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.