Aligning ball bearings during operation shock factor analysis

Bearing is the main source of vibration shaker difficult to control, because the shaker is a great incentive by the work force to maintain the speed limit and the friction coefficient  spherical plain bearings, so bearing radial force suffered great shaker at work process, a lot of exciting force will cause the elastic vibration bearing system. If poor lubrication, it will have a greater friction bearing temperature is too high, the thermal expansion is too large, the radial clearance is significantly reduced, which in turn exacerbated the friction, temperature further.
Plain bearing locking way into two types:
1. staring screws attached bearing inner ring tight simply extend the partial locking screw nails, you can put export bearing fixed peg locking screw with hex wrench. Please select the appropriate size Allen wrench.
2. The locking sleeve bearings attached fair fair locking sleeve has a recess aligning ball bearing vibration and temperature within the recesses Kong its level in the bearing inner ring is also a local fair. First fair on the inner sleeve is positioned toward the direction of the axis of rotation, the rapid rotation of the bearing sleeve know chucking fair date, hex wrench to lock the screw tightly.
Vibration system with eccentric triple row roller slewing bearing system components, can be regarded as a single degree of freedom system. bearing drive shaft and the driven shaft systems exist in the resonant frequency of a certain value, and if a resonance frequency of the excitation frequency close to the resonance. In addition, due to the eccentricity of the existence of centrifugal force, it will produce bending vibrations affect bearing life of material factors, if the speed close to the critical value, the occurrence of bending resonance.
From falling off, indentation, corrosion, cracks, wear, etc. will be in bearing vibration measurement reflected, the bearing vibration of the bearing damage is very sensitive, so aligning ball tower crane bearing through the use of special bearing vibration measurements (frequency analyzer, etc.) to measure the size of vibration frequency can not be inferred by abnormal circumstances. After Since the measured values ​​due to the conditions of use or the sensor mounting position of the bearing, etc., and therefore requires prior to measurements of each machine are analyzed and compared to determine the criteria.
Because bearing even a slight peeling damage, abnormal tone and irregular tone will be issued, and therefore can be used to distinguish sound measuring device, the use of sound measuring device for the sound operation of the rolling bearing size and quality to be checked, since to advance the role of prevention.
If the use of the hole can be measured directly bearing outer ring temperature, is more appropriate position. In general, the temperature of the bearing, the bearing chamber is generally based on the outside temperature can be inferred. If lubrication, install the appropriate department, the self-aligning ball bearing temperature will be rapid rise, there will be abnormal high temperature, when to stop running and take the necessary precautions. Typically,  bearing temperature rise slowly with the start of the operation, after 1-2 hours to reach steady state. The normal temperature of the bearing due to heat capacity, heat capacity, speed and load of the machine and different. If necessary, you can always use heat sensors to monitor bearing operating temperature, and automatic alarm user or stop to prevent burning shaft accident temperature exceeds a predetermined value.

Thrust ball bearings running track installation methods judgment

When truck mounted crane bearing rotates when the raceway thrust ball bearing inner and outer rings and rolling elements due to rolling contact, so run track for the dark side, running track attached to the roller surface are not unusual, thus becomes load conditions can be learned, so when dismounting bearings, please pay attention and observe strict raceway running track.
Thrust ball bearings are correctly installed, affecting accuracy, longevity, performance. Therefore, the design and assembly department to adequately studied bearing installation. I hope to be in accordance with the operating standards for installation. Operating standards of the project generally as follows:
(1), cleaning bearings and related components
(2), size and finishing Check the connected components
(3), the installation
(4) After installation check the bearings
(5), supplying lubricant
Immediately prior to installation, open wind power bearing package. General grease lubrication, no cleaning, directly filled grease. Lubricating oil, do not clean the ordinary, however, the instrument used or high-speed bearings, etc.
Oil use clean wash, remove coating on the bearing rust inhibitor. Removing the bearing rust inhibitor, rust, it can not be placed in the air. For have a grease-enclosed bearing, can be used directly without washing.
four point contact ball slewing bearing installation method, because the bearing structure, with the condition varies, in general, due to multi-axis rotation, so the inner need interference fit. Cylindrical bore bearings, the use of press push, or by hot charging methods. Cone of the occasion, mounted directly on the tapered shaft or sleeve installation.
When mounted to the housing, usually with more clearance, the outer ring interference, usually pressed into the press or shrink fit method also cooling installation. With dry ice as coolant, shrink fit installation situations, moisture in the air will condense on the surface of the bearing. Therefore, proper corrosion protection.
If you look at the trajectory, then this will only burden that radial load to bear large axial load, to withstand the torque load on the bearing housing or extreme rigidity inequality. You can check whether the bearing loads and unexpected plus installation errors, such as whether the ANC and became prosecuted bearing loss for clues to the cause.

Way of bearing temperature during processing by lubricating spherical roller

There are pre-filled with grease greased sealed manner in sealed bearings, as well as inside the casing filled with the right amount of grease at regular intervals to supplement or replacement for grease filling mode. In addition, there are many excavator bearing  eed lubricating machinery, also uses the pipe connected to the lubrication at centralized way for fat. Grease filling can be done after the first time without grease supplement, and its structural sealing device is also relatively simple, so widely used. Lubricating oil is relatively simple. Regular lubrication can greatly improve the spherical roller bearing life Oh!
bearings when the temperature rises, first determine whether the error first move to do, if the temperature is indeed rising, Dangdang that do the following disposition:
(1) Check the cooling water pressure, flow and piping system can generally bearings. If water filter may be clogged down, can not timely disposal of hot disassembly spherical plain bearings ylindrical bore bearings can shut down the disposal, can work when the confirmation is done, then put into use.
(2) When the check governor oil pressure, oil pressure may result if the cooling water hydraulic valve closed.
(3) check whether no bearing spherical ball with the outside of the soundtrack, and can not detect bearing swing very much.
(4) to take oil samples to see whether the oil did not change color, bearing and conduct tests to see whether the variables. If confirmed deterioration, stop change when the new oil.
(5) Check the oil standard oil level can generally, if the non-general, check whether the tank drain valve closed. If the bearing is not closed, when up the oil, if oil leakage sealing pads, when stopping for disposal.
Bearing lubrication performance can be divided into the following areas:
1, the first portions of lubricating spherical roller bearings, reducing bearing friction and wear;
2, the rolling contact surfaces of the bearing oil film often form appropriate to extend the fatigue life of the bearing;
3, through the heat inside the bearing lubrication away due to friction or other causes;
4, by ship loader bearing lubrication to the role of rust and dust.

Tapered roller bearings for use in the environment under which

tapered roller Full complement cylindrical roller bearing are precision components, its use should also be carefully carried out. No matter how high-performance bearings, if used improperly, it will not get the expected performance. Use Notes on tapered roller bearings are as follows.
First, keep tapered roller bearings and their surroundings clean
Even tiny invisible dust into the tapered roller bearings, will increase wear, vibration and noise of the bearing. tapered roller bearings and its peripheral accessories should be kept clean, especially the dust and dirt, tools and working environment must be kept clean.
Second, when using the installation to be carefully
Does not allow a strong punch, not allowed to use a hammer, a direct hit  tapered roller bearings are not allowed to pass through the rolling pressure.
Third, the use of appropriate and accurate installation tool
Try using a dedicated tool, try to avoid using fabric and staple fiber stuff like that.
Fourth,  tapered roller bearings to prevent corrosion
Direct hand pick  tapered roller miniature linear bearings  to fully wash hands sweat, and coated with high quality mineral oil and then operate in the rainy season and summer with particular attention to rust. However, in some special operating conditions, the bearing can be obtained in a longer life of traditional computing, especially under light load conditions. These particular operating conditions that, when the rolling surface (track and rolling elements) are effectively separated and limit pollutants may cause surface damage of a lubricant film. In fact, under ideal conditions, the so-called permanent tapered roller bearing life is possible.
Use the site and conditions of use and environmental conditions to select size, precision, with appropriate tapered roller bearings based on the bearing life and viability of the premise.
1, using the site: tapered roller bearings for joint load to bear radial load mainly radial and axial, usually paired with two sets of crossed roller bearings  primarily for automotive front and rear hub, active gear, differential , a reducer and other transmission parts.
2, the permissible speed: install properly oiled environment, allowing for tapered roller bearings 0.3-0.5 times the speed limit. Under normal circumstances, to 0.2 times the speed limit is the most appropriate.
3, allowing the tilt angle: Tapered roller bearings are generally not allowed to tilt axis relative to shell hole, if inclined, to a maximum of 2 '.
4, allowing the temperature: in under normal load, and lubricant high temperature performance, and under conditions sufficient lubrication, tapered roller bearings are generally allowed to work at -30 ℃ -150 ℃ ambient temperature.

One way bearing technology principle

A ramp and roller design

Ramp and roller one-way clutch inner diameter of the outer drum consists essentially, with the slope and the inner spring force to bear and were always in close contact with the inner and outer rings consisting of a set of rollers. As long as one of the rotating raceway on its impact on the direction of movement has become another industry, this arrangement ensures immediate and guaranteed the ability to go beyond the speed of the drive immediately from nature.

Use:

The design of the one-way truck mounted crane bearing can fit beyond, indexing and non-return of use in a variety of environments.

When used as a use beyond the one-way clutch

Slope-style, one-way roller clutch will be installed in this manner, is to go beyond the outer ring as a member. This point is very important for high-speed beyond. Beyond the use of the inner ring, acting on the roller speed is limited by the centrifugal force will cause beyond.

When used as an anti-kickback when using one-way clutch

Only rotating the inner roller ramp type one-way clutch is adapted to a relatively low speed. If the required speed is higher than the recommended speed, we recommend using the wedge-way clutch.

When used as an indexing using a one-way clutch

The outer ring is often seen as the swing elements are often seen from the inner components. Otherwise, rollers and spring inertia will cause errors, especially at high frequencies indexing. Diluted lubricant use and powerful springs provides high-speed indexing accuracy and quality of.

2, the wedge design

This wedge roughly one-way clutch retainer consists of a strong spring and bearing inner and outer rings, wedges group, wedge. Including wedge to wedge between the outer ring to roll from one track to another raceway transfer power. Wedge has both a diagonal diameter (that is, from one corner to the other on the wedge angle distance) is greater than the other one. In a relatively large cross-section to force the wedging action occurs when the relative rotation of the outer ring inner wedge greater vertical position.

3, self-locking angle

Rely mainly on the wedge wedging action between the inner and outer rings and self-locking wedge angle. The basic concept of the one-way clutch wedge wedge friction coefficient requirements drive the direction of the inner ring with sudden torque of a relationship, the friction value must be greater than the tangent of the angle of self-locking. If the conditions are unsafe, wedging will not happen.

Self-locking by the wedge angle is determined by the structure, the point on the inner and outer rings were used to wedge and its connections.

The initial design of the wedge has a very low self-locking angle to ensure the absolute binding at the beginning. With the increase, the wedge will generate a torque so that the wedge but raceway radial deflection forces, resulting in a wedge roller to a new location. Wedges are often designed with a self-locking can be gradually increased angle, and it is up to the same position from beyond the position of the maximum load marine crane bearing. Relatively large self-locking wedge angle can be reduced by producing a radial force, so long as the ultimate elongation and Brinell hardness requirement allows greater torque is transmitted.

Bearing materials heat treatment of new technology

Currently aeroengine bearings standard materials at temperatures up to 300 ℃ condition with good fatigue strength of high-speed steel. However, when the bearing is running at a high speed or very high speed, the material properties of fracture toughness of this material, the hardness and the resistance to crack generation and scalability can not meet the requirements.
In order to improve the material structure, improve material properties, development of aircraft engine technology to meet the requirements of the bearing, ship loader bearing three different existing materials were studied by experiments illustrate the relationship between microstructure and properties of materials. These three materials are A casting hot rolled steel (M2), one kind of powder metallurgy material (ASP23) and a carbonaceous 0.65 (weight percent), low content of alloying elements of high speed steel derived material.
1. Fracture Toughness
In aircraft engines, since the high speed of the bearing, and the resulting strong centrifugal force, and therefore the fracture toughness of the bearing material is particularly important.
In the hardened high speed steel, carbide fracture process including initial gap caused by the emergence of crack or cracks at the end of the elastic region due to the martensitic matrix microstructure caused decohesion produce. Studies have shown that these three materials, the material with the improvement of toughness, hardness decreased, and the quenching temperature decreases.
This is mainly due to the lower half of the martensitic matrix content and improve tissue elasticity actions. Most carbide steel hardened by a low temperature, they choose adversely affect fracture toughness. In the case of low hardness, since the material yield strength decreased, the difference between the low hardness of the steel depends on Fracture explants taken to the distribution of carbides at high hardness, the decrease in the volume occupied by carbides, carbide and the size of the gap between the elastic material is about the same.
In this case, the fracture toughness is no longer primarily depends on the distribution of carbides and matrix tissue elasticity is also the smallest. Therefore, the fracture toughness values ​​of the three material concentrated in 750HV and higher hardness. Under low hardness, a large area of the elastic case, by increasing the diameter of the carbide or carbides in the reduced hardness of the same conditions the ratio of the fracture toughness can be improved. Further, when the hardness, fracture toughness value of the rate of change is lowered. When the elastic region carbide gap between small and large, the matrix effect
on the fracture toughness of the largest organizations.In short, the fracture toughness of high speed steel mainly depends on the elastic matrix structure, and matrix organizational flexibility also affected by the carbon content of martensite and its largely. The researchers also pointed out that of course can not be ruled out starting carbide, residual stress, and other factors affecting the residual austenite and martensite tempered from precipitation of carbides, such as fracture toughness.
2. The development of fatigue cracks
Researchers crack development process into the following phases:
The first stage, cracks began to expand. Although the critical stress intensity high-speed steel can be changed by heat treatment, but the range is not large absolute value, between 3 ~ 5MPa / m2.
The second stage, crack propagation. Crack growth rate was also similar to the high-speed steel, as in the case 10Mpa / m2, the approximately 5 × 10-6mm / cycle. But with a large steel toughness can slow down the speed of crack propagation.
The third stage, the rapid expansion of the crack. When the crack reaches this stage, mobile crane bearing soon fail.
3. Surface Treatment
According to the study of the relationship between the fracture toughness and other materials crack development process and analysis, we can see that in the presence of high and dn value hoop stress of the situation, the low carbon content of the surface treatment and high-speed steel HSS hardened surface depth change is significant. For this reason, development of a surface treatment process, can enhance the surface hardness and compressive stresses. Surface-treated material has the following characteristics: has good resistance to fatigue crack resistance, the second stage, fracture toughness values ​​have
lower crack growth rate and insufficient hardening or due to the low carbon content of the core material of higher and so on.Such surface treatment method developed comprising:
(1) with a laser, electron beam or induction hardening methods such as inadequate hardened local heat treatment, in order to obtain a surface hardened layer. It should be noted that hardening is insufficient to increase the fracture toughness.
(2) obtained by chemical treatment hardened surface layer. Such methods include carbon or nitrogen to penetrate into the ordinary high-speed steel microstructure, or a small change in the carbon content of the degree.
In short, the company believes in the development of new or improved analysis method of steel heat treatment process for the next generation of aircraft engines, considerable benefit can be obtained from the resulting effect of surface treatment. It can be said that if this microstructure and heat treatment related to the development of the means of mechanical properties once people fully grasp, hardenability steel and high speed steel is bound to be fully utilized in the aero-engine bearings.

The factors of slim ball bearing

A large number of domestic and international tests show: cage, collar, processing quality ball bearing vibration having different degrees of impact, which processing quality ball bearing vibration impact on the most obvious, followed by rings of processing quality, the most important influence factor is the roundness of the ball and rings, waviness, roughness, surface bump injuries.
Our ball products most prominent problem is the discrete vibration, surface defects serious (single point, the group points, pits, etc.), although the surface roughness, size, shape, and the error is not lower than the level of the loop, but the co-sets After high slim ball bearing vibration, and even different sound, the main problem is the waviness no control (no standard, no proper testing of the instruments), while the description of the machine vibration resistance poor, wheel, grinding disc, coolant, process parameters are problematic ; on the other hand to improve the management level, to avoid the bump injuries, scratches, burns and other machines of quality problems at any time.
For rings, the most serious impact of bearing vibration is channel waviness and surface roughness. For example, small and medium deep groove ball bearings inside and outside the channel roundness greater than 2μm, will have a significant impact on the bearing vibration, while the inner and outer channel waviness greater than 0.7μm, slewing ring bearing vibration value increases with increased waviness, the channel serious gouges Vibration can rise more than 4dB, and even different tone.
Whether balls or rings, waviness produced in grinding, superfinishing although you can improve waviness and roughness reduced, but the most fundamental measure is to reduce the process of ultra-fine grinding waviness, avoid randomness bump hurt, there are two main measures:
First, reduce the vibration of the rolling surface of ultra-fine grinding time, get a good shape accuracy and surface finish quality surface texture to reduce vibration, wear super machine must have good vibration resistance, bed and other important structural member having vibration absorption, super precision machine tools Whetstone oscillation system with good anti-vibration performance; improve grinding speed, grinding 6202 foreign commonly used outer raceway 60,000 spindle, grinding speed 60m / s or more, domestic general much lower, mainly due to the spindle and restrictions main bearing performance.
When the high-speed grinding, grinding force is small, thin grinding deterioration, do not burn easily, but also can improve the precision and efficiency, a significant impact on low-noise ball bearings; spindle speed characteristics of static and dynamic stiffness and low noise ball bearing large grinding vibration, the higher the stiffness, grinding speed, the less sensitive to changes in the grinding force, grinding system vibration is smaller; increase support rigidity spindle bearings, using random balancing technology to improve
the grinding spindle vibration sex. Foreign grinding vibration velocity approximately one tenth the domestic general spindle; Whetstone wheel is essential to improve the quality of cutting and trimming. China is currently the main problem is wheel Whetstone uniformity poor organizational structure, seriously affecting the ultra low noise ball bearing grinding process quality; sufficiently cooled, improve filtering accuracy; improve the resolution of the fine feed to the system, reduce the feed inertia; super reasonable processing mill process parameters and manufacturing processes are factors that can not be ignored, grinding allowance should be small, geometric tolerances and strict,
small ball ferris wheel bearing diameter should not use super-lapping, super coarse grinding should be separated to ensure good surface quality.
The second is to improve the machining accuracy of the reference plane, reduce grinding and superfinishing process of error reflection end surface is the outer diameter of the grinding process of super-positioning reference. The outside diameter of the channel ultra fine error reflection on the ditch by the outside diameter grinding, grinding on ditch super error reflection passed indirectly. If the work piece bump hurt in the transfer process, the complex will be directly mapped onto the raceway machined surface, the impact of bearing vibration. So you must take the following measures: to improve the positioning reference surface shape accuracy; processing pass smooth, no bump injury; rough allowance geometric error can not be too large, especially when allowance is small, too large error
will result in a final grinding and ultra-fine At the end of the final shape accuracy has not been improved to the quality requirements, seriously affect the consistency of the processing quality.
From the above analysis is not difficult to see: Auto-line consists of high performance, high stability of the machine system consisting of grinding the most suitable machining ultra low noise ball bearing, avoid bump hurt, reduce transmission error, eliminate artificial factors, improve processing efficiency and quality consistency reduce production costs and improve efficiency.

The needs of different sectors of the bearing what are

First, smelters, mines, steel mills rolling a mechanical device endurance bearings.
Second, power plants, gas turbines, electrical power equipment factory requirements bearings. Such devices are mostly continuous operation, deep groove ball bearing large force, dismantle trouble, inconvenience replacement, it requires very stable bearing quality, wear pressure. Manufacturers generally use more imports.

Third, printing, packaging machinery, food machinery, special bearings and spherical bearings.
Fourth, plastics, chemical fiber machinery, film stretching, special bearings and high temperature bearings. With the development of technology, such machinery and equipment continue to improve, change with each passing day; some foreign and domestic will soon have, the bearings are also equipped with its innovation. Dongguan TR conveyor section, mostly Taiwanese and foreign Southampton FS brand spherical bearings, easy to install, beautiful, easy to replace, favored by the users. Host important parts of some imported bearings. Meanwhile, joint single direction thrust ball bearing, one-way bearings, guide bearings, needle roller bearings, BOPP, PVC stretch film equipment drying oven temperature bearings.
Five, toys, watches, electronics, audio-visual equipment fine-axis zero.
Six, textiles, dyeing, footwear, tobacco machinery selection of bearings. Such bearings small size, high efficiency and durable, require high speed, minimal noise, non-power of plants can not manufacture. Its device-specific and strong, each with different design, using bearings are not the same, generally can not get ready cash, sometimes not easy to find (only frequent traveler customers only know to prepare for an emergency), it is recommended that the user is best done with a prepared one, avoid downtime to be parts, affecting production.
Seven, beer, beverage equipment, medical equipment selection bearings.
Eight, crushing, ceramic machinery, chemical machinery selection of bearings. Such equipment is poor work environment, more than a mist, moisture, dust, acid, etc., require a strong bearing seal, Shantou fat adequate and reasonable, it is best to add grease timely.

Wheel Bearing Maintenance

Before removing the wheels, wheel maintenance should do the preparatory work, the car parked and set up a bridge in order to ensure the maintenance of safe operations.
(1) Remove the hub shaft head decorative cover, dust cover;
(2) Remove the wheel nuts and tires, be careful not to bruise the tire bolt threads. If the disc brakes, the brake should be removed and then used pliers to remove the lock ring or locking pin.
(3) with a special tool to remove the hub;
(4) scrape ferris wheel bearing, journal and hub cavity of the old grease, cleaning wheel bearings and journal with detergent and dry with a cloth, and finally with a cloth to wipe the hub cavity.
(5) Check the wheel bearings and bearing races, found cracks, flaking and loose roller bearings and other phenomena, replace the bearings. If you find pitting on the bearing race, it should replace the bearings.
When cope with the situation
(6) Check the bearing bore and the journal, with the gap should not exceed 0.1Omm measuring journal, should be in the upper and lower parts of the vertical ground (where the maximum wear parts) measurements. If used with the gap exceeds the limit, replace the bearing, so back to normal with the gap. Is not allowed to play glitches, pitting the journal to narrow the gap.
(7) Upon completion of all parts meet the requirements, the inner flanged ball bearing grease after release hub.
(8) When grease the bearing cavity attention should be squeezed into the bearing grease until grease to date to emerge from the other side of the bearing. In the hub and shaft cranial cavity Apply a thin layer of grease to make it play a role in rust. Note the hub cavity grease Do not apply too much, otherwise it will affect the cooling and braking.
(9) the hub and the outer bearings mounted back on the journal, hand-axis head adjustment nut, and then use the shaft torque wrench required to tighten the adjusting nut. After tightening the nut, turning left and right wheels laps should see bearing installation; on the other hand, by rotating the bearing and the race proper fit. At this time spherical plain bearings tightness appropriate wheels to rotate freely and not feel the axial clearance.
(10) Finally, in order to install the locking plate, fixing nut, tires, dust cover and decorative cover and other parts.
(11) wheel bearings adjusted, with some mileage (about 1Okm), stop and check for swab touch wheel temperature, if fever, caused by bearing adjustment too tight, should be re-adjusted

appropriately relaxed bearing tightness.

Automated shiped loading machine

Loading machine is a large bulk mechanical dock for use bulk shipment. Usually ship loader boom belt by the transition belt conveyor, telescopic chute, tail car, running gear, masts, towers, pitch devices, rotary devices and other components, as shown in Figure 1. Bulk loading large port facilities, especially in some large, high-speed bulk distribution center in the energy, power, metallurgy, ports and other industries, stable, set effect, rolling development, plays an important role. ship loader bearing machines are generally continuous loading operations. Therefore, there must be a complete set of equipment to provide a continuous stream loading machine can make continuous shipment. Granary Wharf as feed grain, coal terminal in the quarry bucket wheel reclaimer continuous feeding feeder and so on.
Promote the development of global trade integration within the worldwide demand for bulk transport categories of goods from point of view, iron ore, coal, grain and other bulk cargo shipping volume rose showed rapid growth. Alongside this development is constantly updated ocean bulk transport ship. The attendant is able to dock and unload these large ships to build a super demand for bulk handling port boat equipment, increase the bulk cargo ship also pose new challenges for the design and manufacture of bulk handling equipment ship machines . According to the development trend of bulk automated, predictable, some developing trends shipment machines.
Since the loading and unloading of dry bulk cargo wharf with different characteristics, in addition to the type of ship is greater when coupled with the impact of bulk dust relatively poor operating environment, equipment and technology for the detection of a more demanding, so the current bulk loading boats low degree of automation systems, basically rely on manual field operations. The use of live human operator on the one hand due to the bulk terminal poor working conditions (high temperature, high dust, high noise, etc.) would endanger the health field staff, on the other hand due to poor working conditions and long cargo mobile crane bearing

, pole workers can lead to fatigue, resulting in an accident during shipment. Also due to manual loading, the operation will not standardized unscientific, such as to avoid a collision, the chute overhanging the cabin, causing dust emissions and loss of goods. Since the marina berth is a scarce resource, so the bulk terminal loading process become one of the bottleneck restricting the bulk of logistics, the urgent need to automate loading system, therefore, the future of one of the biggest trends for shipment machine automation will become increasingly high.

Wheel bearing installation, use common sense

Car wheel bearings are used in pairs over most single row tapered roller or ball bearings . With the development of technology, the car has been widely used car wheel units. Growing scope and use of the hub bearing unit, has now developed to the third generation: the first generation is a double row angular contact bearing components. The second generation of the outer raceway has a flange for fixing the bearing, the turntable bearing sleeve may simply be fixed with a nut on the axle.So that the vehicle maintenance becomes easy. The third generation wheel hub bearing units are used bearing units and anti-lock brake system fitted. Wheel hub unit is designed to have the inner flange and outer flange, the inner flange is bolted to the drive shaft, the entire bearing outer flange fit together.Worn or damaged wheel bearing or hub units will make your vehicle is involved in a high anachronistic and costly failure in traveling the road, or even cause damage to your safety. In the wheel bearings use and installation Please note the following:
1, in order to ensure maximum safety and can be *, regardless of the age of the vehicle is recommended that you should always check how long the wheel bearings - note bearing for wear early warning signals: includes any friction or noise when rotating wheel suspension combination abnormal deceleration when cornering.Rear-wheel drive vehicle is recommended for the vehicle to 38,000 km is to deal with the front wheel hub double row ball slewing bearing lubrication. When replacing the brake system, check the bearings and replace seals.
2. If you hear noise emitted wheel bearing parts, first of all, it is important to find the location of the noise occurs. There are many moving parts may produce noise, but also may be some non-rotating member and the rotating member contact occurs. If the confirmation is bearing noise, the bearing may be damaged and need replacing.
3, because the front wheel hub bearing failure leads to both sides working conditions are similar, so even if only one bearing bad, it is recommended to replace in pairs.
4, wheel bearing more sensitive, in any case need to adopt the right approach and the right tools. In storage and during installation, the thin wall bearings

 parts can not be damaged. Some bearings require greater pressure pushed, so they need special tools. Be sure to reference vehicle manufacturers instructions.
5, when installing the bearings should be clean and tidy environment, small particles from entering the bearing will shorten bearing life. When replacing the bearings to maintain a clean environment is very important. Do not allow the bearing with a hammer percussion, note bearing not fall to the ground (or similar misconduct). Before installing the shaft and the bearing housing should also check the condition of, even minor would lead to undesirable wear of mating, thereby causing early failure of the bearings.

Bearing applications in Gantry Crane

    Bridge, gantry crane and trolley carts wheels were powered by a 90 ° angle of the bearing housing assembly together into the wheel group, the overall adjustment tack welding station in the traveling frame, such a structure in the country has become a series of products, and widely used. It is characterized by the frame does not need to go on-line station processing, assembly more convenient. According to the case currently in use, taking into account the load-bearing parts crane wheels are in operation will be affected by the quality of rail and wheel installation itself manufacture and assembly deviation factor deviation, resulting deflect wheel slip, skew and other phenomena while the skew is important to be the one of the factors considered in the design. The main factor in the quality and the wheel itself to manufacturing variations, the deviation of the wheel assembly became gnawing rail mounted on the removal of track. So I plant using a 45 ° angle to assemble the wheel set ship loader bearing, mounted on a 35t and 10t container gantry crane gantry cranes General, and achieved good results.
  (1) The main features ① As the bearing welded to the station frame, supporting hole machining the bearing bore and the overall balance beam with a shape, by working to ensure the accuracy of assembly requirements, thereby greatly reducing the deviation of the wheel assembly group. ② repair, replacement parts wheel set is more convenient. (2) a few questions in the actual design and applications should be noted ① and balance beam supporting the mobile crane bearing

 bore hole while the design on the table frame, the processing, the installation process should be completed in time to ensure that its hole center line parallel, but also to ensure the balance of the wheel center plane of the support points.

Development of wheel bearings

   Traditional automotive agricultural bearings is composed of two tapered roller bearings or ball bearing combination, bearing installation, oiled, sealed and adjust clearance are carried out in the car on the production line. This structure makes it difficult in a car assembly plant, high cost, poor reliability, and maintenance car maintenance, but also the need for bearing cleaning, oiling and adjustment.
    Developed on the basis of the hub bearing unit is the standard angular contact ball bearings and tapered roller bearings on, it will be two sets of bearings as a whole, with good assembly performance can be omitted clearance adjustment, light weight, compact structure, load capacity large, sealed linear plain bearings grease can be loaded in advance, hub seals and omitted from the outside wheel maintenance, etc., has been widely used in cars, and in the truck also has a tendency to gradually expand the application.
    Car wheel bearings are used in pairs over most single row tapered roller or ball bearings. With the development of technology, the car has been widely used car wheel units. Growing scope and use of the hub bearing unit, has now developed to the third generation:
The first generation is a double row angular contact bearing components.The
second generation of the outer raceway has a flange for fixing the crane bearing

, the bearing sleeve may simply be fixed with a nut on the axle. So that the vehicle maintenance becomes easy.The third generation wheel hub bearing units are used bearing unit and ABS anti-lock brake system fitted. Wheel hub unit is designed to have the inner flange and outer flange, the inner flange is bolted to the drive shaft, the entire bearing outer flange fit together.

LYHY ferris wheel bearing Wheel bearing (hub bearing)

Wheel bearing (hub bearing) primary role is to load and for the rotation of the hub to provide accurate guidance, both axial load and radial load, is a needle roller bearings‍ very important component. Traditional automotive wheel bearing is composed of two tapered roller bearings or ball bearing combination, bearing installation, oiled, sealed and adjust the clearance is carried out in the car on the production line. This structure makes it difficult in a car assembly plant, high cost, poor reliability, and maintenance car maintenance, but also the need for bearing cleaning, oiling and adjustment. Developed on the basis of the ferris wheel bearing unit is the standard angular contact ball bearings and tapered roller bearings on, it will be two sets of bearings as a whole, with good assembly performance can be omitted clearance adjustment, light weight, compact structure, load capacity large, sealed bearings can advance into the grease, Angular contact ball bearings‍ hub seals and maintenance advantages omitted from the outside wheel, has been widely used in cars, and in the truck also has a tendency to gradually expand the application.

mobile crane bearing precision bearings configuration issues

For some high-precision bearings, its configuration requirements are very high, today we have to introduce a configuration problem on precision bearings.

Traditional applications of precision machine tool spindle bearings are, depending on the machine spindle processes have different requirements. In general, the lathe ferris wheel bearing‍ spindle is used at lower speeds and greater cutting metal cutting load. This type of transmission of the driving torque of the spindle usually through the pulley or gear. This means that the spindle drive end load is also quite large.

Such applications do not require high speed of the more important parameter is the stiffness and load-carrying capacity. A very common method is to install a working end of the spindle-row cylindrical roller bearings and a double row angular contact thrust ball bearings, while at the end of the spindle drive uses needle roller bearings‍ a double row cylindrical roller bearings. This configuration ensures a long working life and excellent rigidity, to produce high quality parts. Moreover, the bearings can operate stably in terms of kinematics is concerned, because the two types of bearings (radial and axial) were carrying the load applied to the spindle (in fact, in order to prevent angular contact thrust ball bearing bearing diameter to the load, the outer diameter of a special foreign ensure it never tolerances can contact bearing).

In the design of these types of spindles (which is usually applied when the heavy load), a bearing located about the axis of where a rule of thumb the distance between the centers of the front and  Taper roller bearings ‍ rear support bearings for the 3-3.5 times the diameter.

In that require higher speeds (ie, high-speed machining centers or internal grinding), you need to find a different bearing solutions. Obviously, the need to make sacrifices in rigidity and load carrying ability in these cases. High-speed applications usually by direct-motor and / or direct drive spindle coupling (the so-called motor spindle).‍

ship loader bearing Ceramic Bearings

Cheng as an important machine parts, because of its incomparable metal bearing excellent performance, high temperature, super-strength materials such as the new world dominate.

Advantages

First, since the ceramic almost afraid of marine crane bearing‍ corrosion, so the ship loader bearings suitable for operation under harsh conditions covered with corrosive media.

Second, since the ceramic rolling the ball lower density than steel, but much lighter weight, so when you rotate the outer ring centrifugal effect can be reduced by 40%, thus greatly extended service life.

Third, the expansion and contraction of the ceramic affected smaller than steel, and therefore the gap of the bearing is constant, the bearing allows the temperature changes more severe ferris wheel bearing‍ environment.

Fourth, as the ceramic high modulus of elasticity than steel, when the force is not easy deformation, and therefore help to improve the operating speed and achieve high accuracy.‍

LYHY ferris wheel bearing Applications

Medical equipment, cryogenic engineering, optics, high-speed machine tools, high-speed motor, printing machinery, food processing machinery.

In the field of aerospace, marine, nuclear industry, Triple row roller slewing bearing‍ petroleum, chemical industry, textile industry, machinery, metallurgy, electric power, food, locomotives, subway, high-speed machine tools and research needs of national defense and military technology in high-temperature, high-speed, cryogenic, flammable, explosive, strong corrosion, vacuum, electrical insulation, non-magnetic, dry friction and other special conditions of work, replace the indispensable role of ceramic bearings are being increasingly recognized people.

With the continuous advancement of processing technology, increasing the level of technology, the cost of ceramic bearings declining, has been in some high precision applications in the field of small-scale tip, gradually extended from the past only to the national economy in various industrial fields, the market price marine crane bearing‍ gradually approaching practical, to achieve an acceptable level users, the wave of large-scale applications of ceramic bearings have been coming!

mobile crane bearing Uses classification

(1), high-speed bearings: a cold, mechanical elasticity is small, anti-stress, poor thermal performance, light weight, low friction coefficient, etc., can be applied at 12,000 rev / min -75 000 rev / min high speed spindle and the other precision equipment;

(2), the bearing temperature: temperature of the needle roller bearings‍ material itself has 1200 ℃, and good self-lubricating, temperature is not generated due to the expansion caused by temperature differences between the 100 ℃ -800 ℃. Can be used in furnaces, made ​​of plastic, steel and other high-temperature devices;

(3), corrosion-resistant bearings: the material itself has a corrosion-resistant properties, can be applied in the field of acids, alkalis, inorganic and organic salts, water, etc., such as: plating equipment, electronic equipment, chemical machinery, shipbuilding, medical equipment, etc. .

(4), magnetic bearings: do not smoke because of non-magnetic dust, can reduce mobile crane ‍bearing advance peeling, noise and large. Available in demagnetization device. Precision instruments and other fields.

(5), electrical insulation bearings: due to the high resistance force, can avoid arcing damage bearings, available in a variety of requirements for insulation of electrical equipment.

(6), vacuum Bearings: Ceramic materials for unique oil-free self-lubricating properties, in ultra-high vacuum environment, can not be achieved to overcome the plain bearing lubrication Triple row roller slewing bearing‍ problems. Note: The above five categories bearings, bearing the same set can be applied to high-temperature, high-speed, pH, magnetic field, in the non-insulated, but the material properties vary (see performance table of rare earth ceramic material) so please customers choose products, applied according to their own situation, to select the material most suitable ceramic bearings.

ship loader bearing Materials Category Zirconia ceramic bearings

Full ceramic bearings with anti-magnetic insulation, abrasion resistant, oil-free self-lubricating, high temperature resistant, cold, etc., can be used in extremely harsh environments and special conditions. Rings and rolling using zirconia (ZrO2) ceramic materials, keep using polytetrafluoroethylene (PTFE) as the ferris wheel bearing‍ standard configuration, the general use of glass fiber reinforced nylon 66 (RPA66-25), special engineering plastics (PEEK, PI), stainless steel (AISISUS316), brass (Cu) and the like.

Silicon nitride ceramic bearings

Silicon nitride ceramic bearing rings and rolling silicon nitride (Si3N4) ceramic materials, the general use of RPA66-25, PEEK, PI, and phenolic cloth bakelite tubes. SiN4 system ZrO2 full ceramic ship loader ‍bearings compared to material suitable for higher speed and load capacity, as well as suitable for higher ambient temperatures. While providing precision ceramic bearings for high-speed precision and high rigidity of the spindle, the highest manufacturing precision of P4 to UP level.

Full ceramic bearings, full complement ball

Full complement ball full ceramic bearing side with mobile crane bearing‍ Tim ball gap, due to the use of cage-free design, you can load more than the ceramic ball bearing standard structure, thereby increasing its load capacity, also can avoid the restrictions shelf materials can be achieved by ceramic cage type full ceramic bearing corrosion and temperature effects. The series bearing suitable for high speed, the installation should pay attention to the gap surface mounted on one end does not bear the axial load.

Hybrid ceramic ball bearings

Especially silicon nitride ceramic balls ball with a low density, high hardness, low friction coefficient, wear-resistant, self-lubricating and rigidity characteristics, especially suitable for needle roller bearings‍ high-speed, high-precision and long life hybrid ceramic ball bearings rolling elements (inner and outer rings metal). General inner and outer rings ship loader bearing steel (GCr15) or stainless steel (AISI440C), ceramic balls can be used ZrO2, Si3N4, or SiC material.     

LYHY ferris wheel bearing Deep groove ball bearings

(Technical grade: P4, P5, P6, P0) deep groove ball bearings, the most representative of rolling bearings, widely used, can bear radial load and axial load. Suitable for high-speed, low noise, low vibration and high temperature occasion or steel bearings can not be applied, the cold, corrosion, magnetic, mobile crane bearing‍ non-insulated and other fields.

Aligning ball bearings

Aligning ball bearing outer ring raceway spherical, self-aligning, can add error misalignment and shaft deflection caused. Shaft and housing for generating different parts of the heart or shaft deflection and aligning parts of high temperatures, low cold, corrosive, non-magnetic insulation requirements. Note: The tilt is not more than 3 degrees.

Single row angular contact ball bearings

(Technical grade: P4, P5, P6, P0) angular contact bearings for high-speed and high-precision rotation, at high temperature, magnetic field, water and so does not affect its accuracy, and can withstand the synthesis load. Standard contact angle of 15 °, 30 ° and 40 °, the contact angle greater the greater the axial load ferris wheel bearing‍ capacity, the contact angle is smaller bearings can bear radial load and axial load. Generally installed in pairs taken. Please take note at the time of purchase.

Thrust ball bearings

Thrust ball bearings, with the ball rolling by washer-shaped raceway rings and the ball cage assembly components. Can withstand axial load, but can not bear radial load.‍

mobile crane bearing Copper graphite bearings

The process and principles:

1 special production process

Due to the special requirements of the production process, some key industrial and mining equipment operating in extremely harsh conditions. Due to heavy equipment, the ambient Series super thin section bearings‍ temperature is high, dusty or air containing corrosive acid gases CO, SO2, etc., lubrication equipment to mobile crane bring a lot of problems, friction and wear serious, far, most domestic enterprises still follow the traditional above-mentioned oil, greased, and the fact that these mining conditions beyond the oil and grease lubrication range, prone to friction bearings and other bite or killed, causing severe parts wear and damage, regularly lead to equipment outages. In order to produce continuous operation, in addition to the original design requires the installation of multiple units wheel repair, we must also invest a lot of maintenance personnel. Severely limiting the increase in productivity, spare parts and energy consumption greatly, has become an important obstacle to the development of production. Automobile manufacturing, cement production, petrochemical and other companies have made ​​special lubricating material requirements provided under complex working conditions. To this end, mosaic self-lubricating composite material, the material formulation and preparation process to highlight its own characteristics, material properties mobile crane bearing‍ has reached the international advanced level, for enterprises to solve the problem of the special conditions of lubrication, and brought significant economic and social benefits. However, due to various reasons more domestic enterprises have yet to adopt the condition still exists.

ship loader bearing special production process

Due to the special requirements of the production process, some key industrial and mining equipment operating in extremely harsh conditions. Due to heavy equipment, the ambient temperature is high, dusty or air containing corrosive acid gases CO, SO2, etc., lubrication equipment to bring a lot of problems, marine crane bearing‍ friction and wear serious, far, most domestic enterprises still follow the traditional above-mentioned oil, greased, and the fact that these mining conditions beyond the oil and grease lubrication range, prone to friction bearings and other bite or killed, causing severe parts wear and damage, regularly lead to equipment outages. In order to produce continuous operation, in addition to the original design requires the installation of multiple units wheel repair, we must also invest a lot of maintenance personnel. Severely limiting the increase in productivity, spare parts and energy consumption greatly, has become an important obstacle to the development of production. Automobile manufacturing, cement production, petrochemical and other companies have made ​​special lubricating material requirements provided under complex working conditions. To this end, mosaic self-lubricating composite material, the material formulation and preparation process to highlight its own characteristics, material properties has reached Series super thin section bearings‍ the international advanced level, for enterprises to solve the problem of the special conditions of lubrication, and brought significant economic and social benefits. However, due to various reasons more domestic enterprises have yet to adopt the condition still exists.

LYHY ferris wheel bearing key technical principles

Self-lubricating bearing composite mosaic is a novel use of extreme pressure lubricating solid material comprising a metal substrate and embedded in the substrate the holes or grooves of the solid lubricant paste composition. In the course of friction metal substrates bear most of the load. Transferred by needle roller bearings‍ friction, hole or slot solid lubricant or anti-friction surface to transfer, at the friction surface to form well-oiled, strong adhesion and uniform coverage of the solid transfer film, greatly reducing friction and wear. Carried out with friction, continue to provide the solid lubricant embedded in the friction surface, to ensure a good lubrication of the friction during long-term operation.

One, P117 series thrust bearing low cost, strength, wear resistance in general, suitable for a variety of submersible pump thrust bearing.

Two, COP series thrust axis low cost, suitable for small, low power lift submersible pump thrust bearing (thrust bearing outside diameter of 85mm or more, power 11km lift 65m below)

Three, PTFE series thrust bearing moderate cost, is robotics bearing‍ the mainstream product submersible pumps used in Praise submersible pumps suitable for the next thrust bearing.

Four, S299 high strength thrust bearing higher costs, suitable for high-power high head submersible pump under the thrust bearing.

Five, S299B high strength and thrust bearings

Six, S299G high wear-resistant high-voltage current high-tech products

Seven, M120H Series graphite sintered bearing (sintered graphite impregnated with epoxy resin) low cost, suitable for all kinds of Submersible Pump 18.5KW following guide bearings.

Eight, M120B series graphite sintered bearing marine crane bearing‍ (sintered graphite impregnated babbitt) higher costs, 18.5KW various submersible pump above the guide bearings and a variety of high-power, high-head submersible pump thrust bearing.

Nine, M102B higher (asbestos iron) cost more than submersible pumps suitable for 18.5KW guide bearings.‍

mobile crane bearing Skateboard bearings

Skateboard bearings unlike those yo-yo as precise, because there are eight and four in lock bearing a plate above, for bearing the best eight are replaced, regardless of which axis before ringing off the hook, it is necessary to do so.

Bearing Cleaning

Skateboard bearings cleaning is very simple, marine crane bearing‍ get the mobile crane bearing from the board down with a paper towel to grease the bearings, wipe the stain, wipe the wheels inner wall also will change around the front and rear wheel bearings are smooth and look good. Probably every time, the use of high temperatures generated during rotation of the bearing plate, rubber wheels and bearings will close with a week to clean the walls, causing the wheel to change or replace the bearing so often inconvenient when removing the wheel bearing in accord, to avoid trouble can simultaneously clean the mobile crane bearings.

Bearing oil

Remember to clean the oil, a wide range of oil, edible oil all OK, but it was said to buy back the bearing first soaked in gasoline in the week, so it is a waste of gasoline, buy back, after a week cleaning of use when the oil does not matter, bought back the bearing lubricant to prevent bearing rusty oil stored in the needle roller bearings‍ oil with the board when you can send bearing, clean the first time when oil cleared on oils, these oils do not play lubrication, simply can not be heated like a cylinder of liquid only take effect the same amount, only to prevent rust, but is often difficult with the plate bearing rust.

ship loader bearing Advantage of a flange bearing characteristics, the main purpose

Flange bearings from printers, fax machines to monitor, used in household products in their daily lives have a flange bearing products show space technology. In the standard ABEC-1 level size and accuracy requirements, produced by the bearings, to meet the general purpose products.

Products with a flange on the outer ring, needle roller bearings‍ so that the axial positioning easier; ship loader bearing is no longer needed, it becomes more economical. In order to obtain a low friction bearing torque, high rigidity, good rotation accuracy, the use of a small ball diameter. Use of the hollow shaft to ensure that the weight and the wiring space.

The biggest feature is the bearing flange and became one. When the end of the shaft is not connected pieces, such as the board needs to be fixed in the plane, while on the wall flange bearing an expression of its advantages.

In the ultra-small aperture miniature bearings, bearing dust cover plate can be divided into ZZ series, RS rubber bearing seals series, Teflon bearing seals series, flange series, stainless steel series, ceramic ball series. Miniature ball bearings with a wide range of uses. For high-speed rotation, robotics bearing‍ low friction torque, low vibration, low noise requirements.

Flange bearings are suitable for all types of industrial equipment, small rotary motors, office equipment, micro-motor soft drive, pressure rotor, dental burs, hard disk motor, stepper motor, drum recorders, toys, models, fans, pulleys, rollers, transmission equipment, entertainment equipment, robotics, medical equipment, office equipment, testing equipment, gear, transmission, motor optics, imaging devices, card readers, electrical, precision machinery, electric tools and toys.

How to prolong the service life of the bearing flange

Whether buyers or sellers are concerned about the length of life of the bearing. Such as: flange bearings mainly bear radial load, but also to support radial and axial loads. But for the life of the bearing flange are not very understanding, the following three steps will teach you to extend bearing life:

(1) In order to make the radial clearance marine crane bearing‍ between the ship loader bearing retainer and the ship loader bearing ring is provided with greater eccentricity than the internal structure has been improved;

(2) using the FEM analysis, by optimizing the shape and thickness, etc., to improve the strength of the retainer;

(3) In order to prevent a decrease in surface damage caused by the lubricating oil in the bearing ring in the design of the guide groove.‍

LYHY ferris wheel bearing Magnetic bearing system

 Magnetic bearing system is composed of the following five components: controller, rotor, solenoids, sensors and power amplifiers. One of the most critical component is the controller. Controller performance largely determine the performance of the magnetic bearing system. Control law controller conical bearing‍ determines the dynamic performance and stiffness of the magnetic bearing system, damping and stability.

The controller is divided into two kinds: Analog controllers and digital controllers. Compared with the digital controller analog controller has the following disadvantages :( a) adjustment inconvenient; (b) it is difficult to implement complex control; (c) can not simultaneously achieve two or more degrees of freedom control; (d) mutual change is poor, that is, different magnetic bearing controller must have a corresponding; large (five) power consumption, large volume and so on.

Magnetic bearing to be widely used, the difference between analog controller to adjust the performance of online say that it is one of the reasons, therefore, the direction is the marine crane bearing‍ development trend of digital magnetic bearing. At the same time, to achieve intelligent magnetic ferris wheel bearing systems, analog controller is obviously difficult to meet this requirement. Therefore, to improve the magnetic bearing from the performance, reliability, and enhance the flexibility and reduce the volume controller, power, and in the future to network, intelligent direction angles, the controller must implement digitization. The last three decades has been the rapid development of control theory and made widely used.

Magnetic bearings, is a new high-performance bearings. Compared with conventional ball bearings, plain bearings and oil film bearings, magnetic bearings there is no mechanical contact, the rotor can reach very high operating speed, with a small mechanical wear, low energy consumption, low noise, long life, no lubrication, no oil pollution etc., especially for high-speed, vacuum, clean and other special environment. It can single-row crossed roller slewing bearing‍ be widely used in machining, turbo machinery, aerospace, vacuum technology, rotor dynamics identification and other tests in the field, is recognized as a very promising new bearings.

mobile crane bearing Using electric force

Using electric force, magnetic force of the shaft suspension sliding bearings. Electric field force is electrostatic bearing suspension with magnetic force suspension of magnetic bearings (see figure), electric field strength and the magnetic field strength is combined together suspension bearings. A mobile crane ‍bearing both electrodes have the poles in the circuit connecting the capacitor and inductor corresponding to each Liner Motion Bearings‍ other tuner, the stiffness is much higher than the first two, and the corresponding displacement of the maximum force is very small. Electromagnetic bearings for shaft and bearing no direct contact, no lubrication, can be in a vacuum and over a wide temperature range, friction is small, not the speed limit (some speed up to 23 million rev / min line speed of up to three times the speed of sound), long life, the structure can be diversified. Static bearing requires a lot of field strength, the application is limited, use only a few meter. Magnetic bearings with a larger carrying capacity and stiffness, have been used in ultra high-speed trains, ultra high-speed centrifuges, hydro, spacecraft angular momentum flywheels, flow meters, density meter, power meter, vacuum pumps, precision current regulator and gyroscopes. With the development of magnetic and electronic technology, marine crane bearing‍ electromagnetic bearing applications are growing.

Electric force and electric field strength, electric displacement and the electrode area is proportional to the magnetic field strength and the magnetic field strength is proportional to the magnetic flux density and magnetic area. Select the appropriate electric or magnetic field parameters and geometry, get some bearing load capacity and stiffness. Electrostatic attraction between the magnetic attraction is inversely proportional to the square or the distance of the object, according to Hugh Aner theorem, this system is statically indeterminate statics, so in addition to the use of anti-bearing outer magnets or superconductors, in the electrostatic field or static magnetic field work bearing is unstable. For the magnetic bearing is stable, servo device or method must be used to adjust the circuit parameters control. conical bearing‍ The actual use of the general magnetic bearing by radial bearings, thrust bearings, servo-control loop, dampers, speed sensor or position sensor and other components.

ship loader bearing Wheel bearings

Wheel bearings are used in automotive axles for load-bearing and rotating at the hub of providing precise guidance components, both axial load and radial load, is conical bearing‍ an important part of the car load and rotation.

Traditional automotive wheel bearing is composed of two tapered roller bearings or ball bearing combination, bearing installation, oiled, sealed and adjust the clearance is carried out in the car on the production line. This structure makes it difficult in a car assembly plant, high cost, poor reliability, and maintenance car maintenance, but also the need for bearing cleaning, oiling and adjustment.

Wheel Hub Bearing

In standard angular contact ball bearings and tapered roller bearings developed on the basis, it sets bearing as a whole, with good assembly performance can be omitted clearance adjustment, light weight, compact structure, large load capacity, for can advance into the grease sealed bearings, seals and hub maintenance omitted from the outside wheel, etc., have been widely used in cars, and in the truck also has a tendency to gradually mobile crane bearing  ‍expand the application.

History

Car wheel bearings are used in pairs over a maximum single row tapered roller or ball bearings. With the development of technology, the car has been widely used car wheel unit. The growing scope and use of hub bearing unit has now developed to the third generation:

The first generation is a double row angular contact bearing components.

The second generation of the outer raceway Liner Motion Bearings ‍for bearing a fixed flange bearing sleeve may simply be fixed with a nut on the axle. Makes the car maintenance becomes easy.

The third generation wheel hub bearing units are using a bearing unit and ABS anti-lock brake system compatible. Wheel hub unit designed to have the inner flange and an outer flange, the flange is bolted to the drive shaft, the outer flange of the bearing mounted together.‍

LYHY ferris wheel bearing Mobile rotating crane

In the span of a large crane loading and unloading requirements, but I hope not too long crane boom situation, often using mobile rotating crane. Mobile cranes along the ship's rotation and longitudinal movement of two kinds of lateral movement.

Gantry Cranes

This crane is a full container ship (see container ships) self aligning ball bearing‍ and load barges are widely used, usually four-legged type or C type. There is an extendable boom, lifting rungs and a removable tray and cab. Higher levels of bridge girders stowed on the deck of the container, and automatic positioning device, when shipping containers can be placed exactly fall in separate compartments or containers stacked on deck. The number of gantry crane barge load containers on board more than that, from the weight of up to several hundred tons.

Other handling machinery

There are lifts, elevators and conveyors. Boat lift is a vertical movement of the machine along the rails for lifting and lowering between each deck cargo use. Such as multi-use lift decks connected to the delivery of goods on the ro-ro. There lift scissor on ro-ro, chain and several species, its length is 9 to 18.5 meters, a width of 3 to 5 meters. Also installed on some carrier barge loading and unloading cargo barge lift, but lifting capacity is single direction thrust ball bearing‍ much greater than on the ro-ro ships. Hoist is larger in the vertical direction or inclined direction of the continuous movement of goods. Conveyor is a little slope in the horizontal direction or the direction of the continuous delivery of goods. Both mechanical dump is used in loading and unloading of a ship or boat through the side door.

LYHY ferris wheel bearing The bearing temperature are the main reason

The first: whether the lubricating oil quality deterioration? If the viscosity of lubricating oil can also result in INA bearing temperature rise

Second: bearing Angular contact ball bearings‍ assembly if too tight, the gap will lead to inadequate flange bearing temperature rise;

Third: bearing assembly too tight will result in bearing temperature rise;

Fourth: Race rotation on the shaft or shell will result in bearing temperature rise;

Fifth: the bearing load is too large will Excavator Slewing Bearing‍ result in bearing temperature rise;

Sixth: if the bearing cage or a rolling body broken words, will result in bearing temperature rise.‍

ship loader bearing thrust tapered roller bearing

Separation type bearings. A design of the shaft ring and ring raceway and roller rolling surface of the conical surface vertex to the center needle roller bearings‍ line. A one-way bearing can bear axial load, two-way two-way bearings can withstand axial load.

12, the needle roller bearing

The roller length (L) and roller diameter (Dw) than L/Dw > 2.5 and roller diameter (Dw) < roller bearing 6mm is referred to as the Crossed Roller Slewing Bearing‍ needle roller bearing.

12.1 needle bearing radial size is small, but the radial load carrying capacity is very high, can not bear the axial load, use only as a free end ship loader bearing. Lightweight, miniaturization is beneficial to device.

Needle roller bearings without inner ring 12.2 with or without outer ring, only keep the needle assembly frame, the machining accuracy requirements, the match of the journal and bearing seat hole surface hardness should be the same with the bearing Slewing drives‍ ring rolling.

The coefficient of friction of 12.3 needle bearing large, not suitable for high speed.‍