The difference between the high speed bearings and plain bearings

General high speed bearing is the speed reached 60 meters per second bearing. Bearing high-speed, medium-speed and low-speed but not with the speed given at a line speed given. Quick to turn tens of thousands of small bearings is not high-speed bearings, large bearings even a few hundred turn high-speed bearings. Sliding bearings, hydrostatic bearings, hydrodynamic bearings, aerostatic bearing, the gas dynamic pressure bearing are suitable for high-speed rotation. Adaptation and general rolling bearing rotational velocity in low,If you use a high-speed rotation of rolling bearings requires special requirements. Above the national standard bearings are easily found in the bearing, it is reasonable to choose their models based on the use of the load and other factors.

Ferris wheel to take "sub-assembly method with" Install

Ferris wheel to take "sub-assembly method with" Install. Firstly the spindle and the ferris wheel bearing installation, which is the dot whole Ferris wheel; followed by the installation of the wheel and cockpit, wheel outside the racking several transparent cockpit, which can concept for hundreds of people; and finally electric drive mounting device, which is located in the Ferris wheel and bridge binding place, after opening the Ferris wheel can be controlled uniform rotation, revolution needs about 30 minutes to reach the highest point, with sweeping views of the surrounding, you can see within a radius of 40 km views. Ferris wheel means no gear wheel bearings four point contact ball slewing bearing, a separate type of bearings, it can be said that a two-way bearings can withstand axial load angular contact ball bearings.

Wheel bearings applied ferris wheel bearing

turntable bearing can withstand a large axial load, radial load and overturning moment, such as integrated load, set bearing, large bearing rotation, transmission, fixed and other functions in a special structure. Under normal circumstances, transfer All with their own plate bearing mounting holes, lubricants and seals, to meet the different needs of a variety of different types of work working conditions hosts; on the other hand, wheel bearing itself has a compact, convenient rotation guide, installation Simple and easy maintenance, etc., are widely used in material handling equipment (ferris wheel bearing), mining machines, construction machinery, port machinery, wind energy, medical equipment, radar and missile launchers and other large rotary device.

ship loader bearing

ship loader bearing is used for bulk loading dock used for large bulk handling mechanical bearings. Usually by the boom belt loading machine, the transition belt conveyor, telescopic chute, tail car, running gear, mast, tower, tilt device, slewing drives and other components, a large bulk shipment port equipment, energy, electric power, metallurgy, ports and other industries, especially some large bulk distribution center speed, stability, collection efficiency, rolling development, plays an important role. Installed generally continuous loading operation. Therefore, there must be a complete set of equipment to provide a continuous flow of material loading machine can make continuous shipment. Such as feed grain terminal barn, yard Coal Terminal in bucket wheel reclaimer continuous feeding feeder like.

Acoustic emission technology

Acoustic emission (ae) technology as one of the early detection of material injury powerful tool has been widely used in petroleum, petrochemical, power, aviation, aerospace, metallurgy, railway, transport, coal, construction, machinery manufacturing and other processing, at low speed Overload device diagnostics field acoustic emission-line monitoring for port Crane (mobile crane bearing), providing more accurate information to the low-speed rolling bearing fault diagnosis, discussed the application of acoustic emission sensors to monitor the speed (10 ~ 1850) r / min angular contact bearing, found at low speed acoustic emission sensors in each pair of bearing balls bearing concentrated loads caused by small strain responsive, further evidence of the effectiveness of the acoustic emission technique.

Roller coaster

Roller coaster on our common observation wheel will need at least two large spindle bearing, this bearing applications we called ferris wheel bearing, each side needs to custom design a spherical roller bearings, which sealed spherical roller bearings almost unprecedented weight and size. Each bearing the weight of about 8800 kg, it is designed to be an outer diameter of 2300 mm, an inner diameter of 1600 mm, and 630 mm in width, while the use of advanced lubrication, sealing and online condition monitoring system and lead monitoring bearings.

What materials are used in wheel bearings

Rolling bearing steel is mainly used in the manufacture of rolling elements and rings. Since the bearing should have a long life, high-precision, low heat, high speed, high rigidity, low noise, high wear resistance and other characteristics, thus requiring bearing steel should have: high hardness, uniform hardness, high elastic limit, high contact fatigue strength, toughness necessary, certain hardenability in atmospheric corrosion lubricant. To achieve the above performance requirements, bearing steel chemical composition uniformity, non-metallic inclusion content and type, carbide size and distribution of decarbonization and other demanding. Bearing steel development to quality, performance and overall direction of many varieties. To meet the high-temperature, high-speed, high load, corrosion, anti-radiation requirements, the need to develop a series of new bearing steel called special bearing with special properties. Along with economic development and industrial technological progress, expand the scope of application of the bearing; and the development of international trade, but also to promote the development and application of bearing steel to international standards and new technologies, new processes and new equipment, high efficiency, high quality, cost Low of supporting technology and process equipment came into being.

How to install slewing bearing (wheel bearing) is correct

turntable bearings,also known slewing rings,is a way to withstand large axial load, radial load and overturning moment large bearings. Wheel bearings generally come with mounting holes, internal gears or external gears, lubricants holes and sealing devices, which enable the host compact design, guide reliable, and easy maintenance. So how to properly install and maintain slewing ring?First, the transport, storage slewing ring rust oil coating at the factory, and with the film wrapped, the packaging rust usually valid for 3-6 months. Its storage temperature should be 20 ± 10 ℃, and relative humidity less than 60%, after more than valid, timely maintenance.Second, install the first open slewing ring packing, inspection certificate and signs, regular slewing bearing manufacturer should have a certificate and signs, used to confirm the correct type slewing ring.Third, regular inspection and maintenance.

Cylindrical thrust roller bearings &Tapered roller thrust bearings

Cylindrical thrust roller bearings consist of small cylindrical rollers arranged flat with their axes pointing to the axis of the bearing. They give very good carrying capacity and are cheap, but tend to wear due to the differences in radial speed and friction which is higher than with Thrust Ball Bearings.Tapered roller thrust bearings consist of small taper roller bearing arranged so that their axes all converge at a point on the axis of the bearing. The length of the roller and the diameter of the wide and the narrow ends and the angle of rollers need to be carefully calculated to provide the correct taper so that each end of the roller rolls smoothly on the bearing face without skidding. These are the type most commonly used in automotive applications (to support the wheels of a motor car for example), where they are used in pairs to accommodate axial thrust in either direction, as well as radial loads. They can support greater thrust loads than the ball type due to the larger contact area, but are more expensive to manufacture.

thrust ball bearing of Luoyang Huayang

A thrust ball bearing is a particular type of rotary ball bearing. Like other ball bearings, they permit rotation between parts, but they are designed to support a high axial load while doing this (parallel to the shaft). Higher speed applications require oil lubrication. Generally, they are composed of two washers (raceways) which may be grooved the rolling balls elements which are typically caged. As opposed to thrust roller bearings, ball thrust bearings can generally operate at higher speeds but at lower loads.

needle roller bearings

Use of needle roller bearings, printer manufacturers are still making trouble in the need for processing high precision coat, and need an experienced installer to find the right needle group. To solve this problem, the bearing outer ring manufacturers developed integrated flange bearings. Needle roller bearings can achieve good precision and rigidity through preloaded. And you can also use the inner tapered to arbitrarily adjust the bearing clearance. Such solutions can achieve zero clearance printer roller bearings.It needs. And the outer ring with
flange for printer manufacturers to solve the installation and lubrication problems. MAN Roland, Heidelberg, Japan and Li You than domestic models widely used in the North were bearing. Its needle roller bearings support programs have become a printer in Drum support mainstream programs.

Crossed Roller Bearing Inspection noise type and identification of causes

Crossed Roller Bearings abnormal sound occurred during the operation, a wide range of formation mechanism is more complex, factors that are multifaceted, and various abnormal sound often added together, it is difficult to distinguish, mainly due to the following categories:
1. The bearing inner and outer raceway presence bump hurt, scratched or periodic vibration pulse serious defect.
2. Scroll surface bump hurt of rolling bearing, aperiodic oscillation pulse scratches and other defects caused.
Periodic or aperiodic oscillation pulse
3. Since residual magnetism adsorption iron powder present on the raceways or rolling elements caused.
4. impurities or dust into the bearing raceway pulse caused by aperiodic vibration. Must be done in space when high cleanliness of cross roller bearing assembly.
5. aperiodic oscillation pulse violent collision between the rolling element and spacer blocks caused.
6. poor performance lubricants, rolling vibration pulse generated when the lubricant sliding friction between the rolling element and spacer blocks and the rolling elements running. Crossed roller Slewing Bearing senior grease, in order to ensure the use of sophisticated demand environment.

rolling bearing has some shortcomings

Rolling bearing also has some shortcomings, mainly:

1. Rolling bearing load bearing capacity than the same volume of spherical plain bearings is much smaller, and therefore, bearing large radial dimension. Therefore, in the case of heavy load to bear and requiring small radial dimension, compact structure requires occasions <such as crankshaft bearings), the use of sliding bearings;

2. Rolling bearing vibration and noise is large, especially in the use of late particularly significant. Therefore, demanding precision, without Xu Youzhen moving occasion, Rolling difficult to competent, generally used in sliding bearings better.

3. Rolling bearing metal shavings and other foreign matter is particularly sensitive, bearing enters the foreign body, it will have a greater intermittently vibration and noise, also cause early damage. 

In addition, because the metal clip Rolling impurities also easy possibility of early damage occurs. Early damage does not occur even if the life of rolling bearings there are certain limits. In short, the life of rolling bearings is shorter than the plain bearing. However, Rolling and plain bearings compared advantages and disadvantages, each occupy a certain application of occasions. Therefore, the two can not completely replace each other, and each to a certain direction, to expand their fields. However, due to the outstanding advantages of rolling bearings, quite latecomers trend. Currently, the rolling bearing has developed into the main types of mechanical support, the application more widely.

Rolling bearings compared with sliding bearings, it has the following advantages

Rolling bearings compared with sliding bearings, it has the following advantages:
1. Rolling bearings friction coefficient than the slide bearings, high transmission efficiency. General Bearing friction coefficient is 0.08-0.12, and only Rolling friction coefficient 0.001-0.005;2. Rolling has achieved standardization, serialization, universal, suitable for mass production and supply, use and maintenance is very convenient;
3. Rolling bearing steel manufacturing and after heat treatment, therefore, bearing not only has high mechanical properties and long life, and can save manufacturing sliding bearings used in more expensive colored Metal;
4. Internal bearing clearance is small, high precision of the parts, and therefore, higher running accuracy. At the same time, it can increase the rigidity of the bearing by preloaded approach. This high precision bearings is very important;
5. Some rolling bearings can support radial load and axial load, it is possible to simplify the bearing support structure;
6. Due to the high Rolling transmission efficiency, less heat, and therefore, can reduce oil consumption, lubrication maintenance relatively easy;
7. Rolling can be easily applied to any position of the shaft space.

Performance characteristics and advantages of rolling bearings

Rolling bearings advantages are as follows:
1. The friction is small, small power consumption, high mechanical efficiency, easy to start.
2. The size standardization, interchangeability, easy installation and removal, and easy maintenance.
3. Compact and lightweight, the axial dimension is more narrow.
4. High precision, high speed, low wear, long life, suitable for high precision bearings.
5. part with self-aligning bearing performance.
6. suitable for mass production, stable and reliable quality, high production efficiency.

Roller bearings and ball difference function

Roller bearings and roller ball bearings of the same points that they are high-vice campaign; all rolling bearings, has the characteristics of the performance of rolling bearings. The difference is that roller bearings deputy campaign and roller bearings are point contact and line contact. The use of roller bearings, printer manufacturers are still making trouble in the need for processing high precision coat, and need an experienced installer to find the right needle group. To solve this problem, manufacturers developed a bearing outer ring flange integrated roller bearings. Roller bearings can achieve good precision and rigidity through preloaded. And you can also use the inner tapered to arbitrarily adjust the bearing clearance. Such solutions can achieve zero printer roller bearing clearance requirements.

Thrust ball bearing

Thrust ball bearing is a separate type of bearings, shaft ring, seat ring and the cage can be, the ball component separation. Shaft ring is cooperating with the shaft collar, seat is compatible with the bearing hole of the ring, and there is a gap between the shaft; thrust ball bearings can only bear axial load, single direction thrust ball bearings can only bear axial load in one direction, two-way thrust ball bearings can withstand axial load in both directions; thrust ball bearings can not limit the radial displacement axis, the limit speed is very low, one way thrust ball bearings can limit a shaft and housing axial displacement direction, two-way bearing can limit the axial displacement in both directions.

Deep groove ball bearings

Deep groove ball bearings are rolling bearing the most common type. The basic model consists of a deep groove ball bearing outer ring, an inner ring, a steel ball and a group of holding structure into. Deep groove ball bearing type has two kinds of single and double row deep groove ball structure also split seal and open two structures, open means bearing structure without seals, seal deep groove ball into dust seal and oil seal. Deep groove ball bearings mainly take radial load, but also to support radial and axial load. When the only radial load, the contact angle is zero. When the deep groove ball bearings with a larger radial clearance, the performance with angular contact bearings, can withstand greater axial load, deep groove ball bearing friction coefficient is small, speed is also very high.

The basic structure of wheel bearings

Wheel bearings can withstand a large axial load, radial load and overturning moment, such as integrated load, set bearing, large bearing rotation, transmission, fixed and other functions in a special structure. A series of four point contact ball bearing turntable bearing turntable belonging, which consists of two races composition, compact, ball and arc raceway four-point contact. Mainly used truck cranes, tower cranes, excavators, piling machines, construction vehicles, radar scanning equipment to withstand the overturning moment and vertical axial force, the level of tendency force of machinery.

Rolling tower crane repair Points to note

Most tower crane used in the rolling bearing should be renewed in the repair and overhaul period. Rolling bearing secondary site without carefully checked found to be defective may continue to be used. Where the ball and spacer ring rust, raceway surface wear and fatigue erosion, balls and steel columns for wear scratches, damage and isolation ring inside, coat cracked bearings, it must be replaced. The inspection can continue to use the rolling bearing must be clean, in order to continue to use.

Cranes bearing applications

Lifting or horizontal applications, bearing play a significant role in regulating the different lifting equipment, bearing requirements are not the same. Here a crane bearing, pulley in the crane hook with that there is a bearing, full complement cylindrical roller bearings, with seals on both sides, using rope or crane hook bearing movement of goods known as mobile cranes bearing.

The stress analysis of crankcase

According to the stress analysis of the crankcase, consider the strength, confirm the deformation amount and bearing clearance of crankcase and bearing, calculating miniature linear bearings life, and try to optimize the bearing and axle box.
The maximum deformation of 1.5MW four point contact ball slewing bearing and axle radial fan for 0.07mm. Considering the calculation results of deformation and bearing clearance  and the crankcase as steel body life difference within 5%, this value in practice is not a problem. The life of difference, life is shortened, then, must change the axle box design, improve the rigidity.

Mainstream of bearing types

For bearing types,linear plain bearings and mobile crane bearing is the mainstream, but most of the use of self-aligning roller bearings in the non linear favorable. Non linear spindle generally need to consider the plus or minus 0.5 degrees.
As B type automatic self-aligning roller bearing  is designed by the use of the middle block side guide roller , it is no skew of the maximum load wide in the minimum load to load region , which can run in a stable torque and low fever cases.
In addition,vibration of blade and gear box vibration increasing of the rotor thin wall bearings, there is danger of corrosion and friction .Therefore, optimal bearing selection and clearance and mating and selection of suitable oil is very important.

Study on the thermal characteristics of rotary bearing

The friction heat of spindle bearings significantly influence the speed and the dynamic performance of the rotary bearing unit, is restricting the main factors to improve the machining efficiency and precision.
To build up the heat transfer equations, the friction heat and temperature distribution calculation of bearing, thermal characteristics research of bearing, and its impact on the speed and dynamics is an important topic with theoretical
and practical significance.
In this paper, based on the heat transfer, tribology of agricultural bearings and rotor dynamics as the theoretical basis,taking the GDZ48A type electric spindle as an example, establishes the spindle bearing considering the effect of friction heat and pre tightening mode quasi dynamics analysis model, analyzes the bearing friction torque, motor, load and stiffness, study the influence of thermal characteristic, tower crane bearing design and application parameters on the speed and dynamics, and validated by experiments.

ball and roller combined bearing

ball and roller combined bearing dynamics performance study  including ,
1) dynamic analysis of pseudo bearing, the establishment of improved quasi dynamics analysis method, considering the effect of friction heat and pre tightening mode, calculation of bearing load, motion, displacement, friction torque and friction heat equation.
2) calculation of bearing temperature distribution, using heat transfer theory, the establishment of the spindle unit of heat transfer model, derives the heat transfer resistance and heat transfer equation.
3) thin section bearing operation performance calculation, the effects of example calculation and thermal characteristics, analysis of bearing design parameters and Preload Method on operation performance.

three row roller slewing bearing

three row roller slewing bearing needing preload is generally as angular contact ball bearings front bearing use.
triple row roller slewing bearing is generally used in groups, pre tightening in two ways,
1, bearing between the spacer sleeve, the top outer ring, inner ring with pressure pretightening nut.
2, at the end of main shaft side top outer ring, inner ring with a pre tightening nut pressure behind.

Methods 1 septum sleeve ends parallel precision must be very good. Mode 2, pressure ring side of the shaft is vertical to very good accuracy.
On the vertical accuracy requirements of bearing side with the thread of the locking nut is also high.
In addition, bearing must not install anti, anti loaded words bearing will be pressed powder.Note that the pre tension (or preload) must meet the requirements of bearing the instructions, otherwise it will damage the bearing.

The inner ring and shaft coordination

With the inner ring and the shaft, with no interference, no clearance of the state as the target (Line to Line). With the outer ring and the outer shell is movably matched with the hole.
Used in the same inner diameter of the casing in parallel with the double row spherical roller bearing case, outside diameter tolerance is F6, so as to be movable fit.
thrust ball bearing screw support frame for angular contact ball bearing ,as the shaft size tolerances recommended H5 as shell hole size tolerance, recommendation H6
The clearance and preload bearings
Install bearings, applying pre load appropriate to give, as the axial clearance, the regulations are as follows.

Spindle bearing and running

The running purpose is to make the bearing in the formal angle before, the roller and raceway contact through running, can have good conditions, to maintain the bearing contact with good accuracy, and avoid the damage of the bearing roller in the beginning due to high-speed and heavy haul when in use and the raceway, thereby improving the bearing  life and accuracy .
Because the cross roller bearings is not completely rolling contact, between the shoulder and the inner roller end the existence of sliding contact, if the condition is not good, it is easy to appear the phenomenon of occlusal damage, so more attention should be paid to this kind of bearing running.
The precision spindle bearing is the main shaft bearing of precision machine tools and similar equipment, to ensure the accuracy of its work and the use of performance of precision machine tool.

Set the value of the hydraulic system and crane bearing

In general, truck crane bearing hydraulic system pressure is 18 ~ 35MPa; through a multi way reversing valve, the hydraulic cylinder, hydraulic motor actuator to perform each action.

  Thus for the fault of hydraulic system pressure is insufficient, according to the form to diagnose five institutions loop,linear plain bearings , what is the insufficiency which loop system pressure.

  For example, rod reducing pressure, pressure is not up to the allowable value, which indicates lack of telescopic crane loop system pressure. Then according to the hydraulic circuit pressure is insufficient,mobile crane bearing , according to the basic form of the pressure pump oil supply mode and the hydraulic circuit, judge which is a hydraulic pump, an overflow valve malfunction caused by insufficient pressure.

Mobile crane bearing and the three oil supply

Fuel pump is three,mobile crane bearing small displacement pump as the outrigger retractable circuit and power supply circuit of rotary mechanism; the larger displacement pump for telescopic crane boom luffing loop and loop injection.( radar bearing ) The largest displacement oil pump and oil pump confluence in the larger displacement car combined control valve common power supply circuit for lifting mechanism.

  Whether two or three oil supply, oil supply,ship loader bearing the basic forms of hydraulic circuit for hydraulic pump, the pressure oil discharged a routing pressure relief valve adjustment after the return tank.

Crane bearing and lack of system pressure

Insufficient pressure of automobile crane hydraulic system is mainly due to the overflow valve hydraulic pump,bearing manufacturer failure cause. Truck crane hydraulic system generally consists of two or three hydraulic pump to provide pressure oil system.

  Fuel pump is two, small displacement pump as the outrigger retractable power supply circuit,mobile crane bearing the manual reversing valve outrigger retractable loop is in place, the pressure oil enters through the center of the revolving body connector on the train combined control valve.

  Large displacement pump output pressure oil through the center of the revolving body connector also enters the pressure oil pump output bus combination valve and manipulation of small displacement confluence together for the slewing mechanism, lifting mechanism circuit loop, telescopic crane bearing boom luffing loop and loop injection.

Crane bearing telescopic crane loop and lifting arm luffing loop

• Telescopic crane loop

The hanging arm is composed of basic arm and a telescopic arm,mobile crane bearing a telescopic arm in arm in the basic set. Telescopic boom is controlled by the telescopic hydraulic cylinder and steel wire rope. In order to prevent the hanging arm falling on the mass of the balance valve, a telescopic loop.

• The lifting arm luffing loop

The so-called amplitude hydraulic cylinder is used to change the angle of the boom.( ship loader bearing ) Luffing operation is also required to prevent the drop in weight function, therefore the lazy arm amplitude circuit is also provided with a balanced valve. Failure of truck crane bearing hydraulic system is mainly manifested in the five loop, the most common fault is the system pressure is insufficient and the hydraulic cylinder retracts.

Mobile crane bearing hoisting mechanism brake system

Brake system in the lifting mechanism is arranged on the brake cylinder, so as to turn in a hydraulic motor,agricultural bearings , brake lock lifting hydraulic motor. At the same time in the brake cylinder into the oil passage is provided with a one-way throttle valve, and its role is to enable the brake brake fast, slow release the brake.

  The former is to enable the motor to brake quickly, quickly stopped falling weight. The latter is when the load lifting process again in mid air,mobile crane bearing , avoid heavy weight of the hydraulic motor drag inversion and produces transient downhill phenomenon.

Hydraulic truck mobile crane bearing

Due to the arrangement of the balance valve( marine crane bearing ), so that the hydraulic motor can only have the pressure in the oil inlet of case rotation, so falling will not produce the phenomenon of nod.

  But the leakage of the hydraulic motor of the hydraulic cylinder is much larger than that when the load hanging in the air, although the balance valve is provided with a circuit,agricultural bearings  ,they may still produce the slipping phenomenon.

Hoisting mechanism circuit of mobile crane bearing

The lifting mechanism is the main implementation mechanism of crane, winch is driven by one or two large torque hydraulic motor.( ferris wheel bearing ) Motor forward and reverse control by a manual three position four way reversing valve.

  The rotational( rotary bearing ) speed of the motor, namely the lifting speed can be adjusted by changing the speed of the engine. In the back of the oil motor decline on the road with the balance valve,ship loader bearing used to prevent the free falling weight.

Slewing mechanism circuit of mobile crane bearing

The slewing mechanism ( slewing bearing manufacturer )adopts the hydraulic motor as the actuator. The hydraulic motor through a speed reducer to drive the turntable, the turntable speed is low, generally 1 ~ 3r/min. To obtain a left turn, right turn stop,mobile crane bearing three different conditions through a three position four way manual reversing valve.

Outrigger retractable of hydraulic truck crane bearing

Because the bearing capacity of the Automobile Tire Co., during the lifting operation must put down the leg, make tire overhead, and the car must be the away leg. There are two legs before and after the crane bearing , each leg were controlled by the manual reversing valve, the legs with horizontal and vertical hydraulic cylinder hydraulic cylinder (mobile crane bearing ).Vertical hydraulic cylinder with bidirectional hydraulic lock, to ensure that the leg is reliably locked, prevent the lifting operations occurring in the process of Soft Legs phenomenon or in the driving process of hydraulic legs automatically falls,ferris wheel bearing .

Full hydraulic mobile crane bearing

Full hydraulic truck crane is a kind of truck crane slewing （crane bearing ), luffing, full hydraulic transmission and hydraulic operation.
  The outrigger retractable, slewing mechanism, the five part telescopic crane lifting mechanism, and the lazy arm amplitude are the hydraulic drive, stepless speed regulation( high speed bearing ), and according to the need to make any part of a separate action,mobile crane bearing also can be in the implementation of components is not full, the implementation of components of each series of any group of contract action.

Reflections on the ferris wheel project

For the Henri Vander Knokke and his colleagues, this is a very exciting experience, he confidently said，from the project, we learned a lot of things, and the experience will be well applied in the future.

  Schaeffler Group in Berlin and Orlando Ferris wheel project also got orders. Customers like Schaeffler Everything is contained therein., worry free packaging services, thanks to during operation we can provide a technical support for the production and design service, which is provided by the Schaeffler subsidiary of --FAG company.

  All members of the team project has a dream: to Beijing to really enjoy a world's tallest ferris wheel travel. This is what they deserve.

All the casual products,behind which have a team in unremitting efforts. So this is also so for LYHY bearings，take the quote of the film ,Our lives are not our own, From womb to tomb, we are bound to others.It is these connections, or effort, composed of a bearing universe.

Safety test of ferris wheel bearing

About the test—— ferris wheel bearing installed in Beijing not only requires a 100 meter high tower, but also need for many eye bolt for bearing rising.

 Some people think this is a very simple thing. But far from it, We conducted a series of complex experiment in Herzogenaurach ,Schaeffler group headquarters . Technical personnel must examine these eye bolt line whether can withstand so large a weight. Because one thing must be guaranteed, it is safe.

The true test of patience in the process of bearing

Finally, the  bearing is further processed and installed by large bearing expert FAG in Wuppertal . Although we have a large bearing experience of ten years, but the project was the emergence of one or two unexpected things, product manager Gerd Benninghoven said.

  The outer ring reluctantly into hardening furnace. However, no one can know the process how it would affect the material. In fact, bearing ring diameter during heat treatment reduced about 1 cm. In the final machining process, in any case range must be restored.For such a large part, this is a very challenging work.

  Benninghoven said,just imagine, in the processing cycle , the length measured by a tool is more than 20 kilometers, this is because it needs to pass through metal, which is the true test of patience.

Design engineer's memory

Worked in the spherical roller bearing production line design engineer Rainer Schrode said. So the first thing we need to do is to confirm whether our production equipment to produce such required bearing.

  Whether the production of tools can produce such bearing size? Is setting the fire big enough? Can the starter afford this weight? What is the best way to China? How to ensure a smooth installation? A multitude of things, but in the act with united strength, design, construction and production departments of the actuarial, step by step, we finally determined the scheme.

  Van der Knokke recalls,in this process, the team members to continuous innovation, a time to adjust the schedule. Circular bearing is composed of a supplier in Italy dozen circle casting. Barrel roller is  making in FAG workshop of Eltmann, finalize the design is in Wuppertal, and then was sent back to the Eltmann for the new grinding.

Beijing bearing standard contrast the world's largest Ferris wheel

The real work that engineers are impressive, only when you really start to face with huge bearing imagined in the silver light you can realize its true size, an unprecedented huge monster.

  Schaeffler heavy machinery group company's person in charge Henri van der Knokke recalled,When a written request we received Beijing great wheel dimensions and specifications, the first feeling is not believe my own eyes, when we research this project, like a spherical roller bearing require to undertake such a large size is unprecedented.

  In fact, the team was involved in the design, the construction was acclaimed as the world biggest Ferris wheel of the London Millennium years ferris wheel bearing. But Beijing ferris wheel was put forward further requirements: bearing outside diameter size of London is 2600 mm, but this is just the standard of inner ring hole bearing  in Beijing.

The huge monster rotating bearings

In Schweinfurt, August 29, 2008. The two Normal spherical plain bearings in fact is nothing special,except its unordinary size, external diameters 3200 mm, 2600 mm inner hole, ring width of 630 mm.

  Each bearing are connected with 118 rollers, each weighing almost 20 kilograms.
A total of nearly 11 tons of steel insert each bearing,which can be very appropriate to call  the Huge Monster Rotating bearings. Soon the huge monster will start the service in 108 meters above the ground,new Beijing Ferris wheel is a 208 meter high - this huge monster just like two huge bearing rotating around it.

  The ferris wheel design can accommodate 1920 tourists, 20 minutes of air travel to watch the beautiful scenery of Beijing .

The ferris wheel appearance of Haihe River

In the German custom of Cihai Bridge giant wheel bearing reached  construction site of Tianjin,China,2007.  After the installation is complete implementation of the ferris wheel  installed on the Cihai Bridge Human character support, basicly complete in June. 110 meters in diameter of the giant ferris wheel  appear on Haihe river.

  According to the construction personnel of Cihai Bridge  introduction, the Cihai Bridge Ferris wheel is the world's only built on the bridge Ferris wheel, the 110 metres in diameter, which is relatively high for carrying the ferris wheel rotating bearing technology requirements.

  The bearing in the German custom diameter of 3.5 meters, is located in the center of the main bearing of Cihai Bridge Ferris wheel.

  Reportedly, at present, there are some parts of Cihai Bridge in the field of production, for supporting the Cihai Bridge giant Ferris wheel Human word bracket has been installed, with the installation of the ferris wheel condition.

  The ferris wheel of the installation is a difficult engineering, roulette will be divided into 24 equal parts, a section to install, just as the segments into a big orange.

Strong mobile crane market

In March, 2009 ,truck crane, crawler crane ,lorry-mounted crane， wheel crane and other cranes of radar bearing four cumulative sales of more than 3000 , 56.82% growth than last month,  9.05% over the same period last year. The first quarter of four cranes of cumulative sales of 7056 units,4.40% below  compared to the same period last year.

  Overall, the recent China four categories of ship loader bearing market continued to show strong market development trend, showing a basic Production and Sales Booming situation. But due to the 1-2 month crane market dragged down, four categories of mobile crane market performance is still slightly less than a quarter of the same period last year.

According to the general rising market demand, a mobile crane bearing market must also ready for action.

The ferris wheel bearing tragedy

In December 4, 2014, Pakistan's second largest city Lahore  Jalloh  theme park ferris wheel bearing fault occurred, 5 school teachers and students died on the spot,leaving 47 victims.
  At 11 AM, the local  West school teachers and students sit to pull on the skyscraper wheel, with the big wheel rotation. When the ferris wheel to the top speed, bearing rupture suddenly,the ferris wheel like huge monster for the centrifugal force quickly to outside the crowd came hurtling, hitting people picnic on the grass, on the spot to fall dead, killed 5 teachers and students, of which 3 are children of 8-13 years old, the other 2 are old.

  According to reports, the Jalloh theme park recreation facilities in disrepair, serious lack of maintenance. Events soon, casualties of teachers and students family members decided to jointly to resort to the law, requirements for the park managers to make tough sanctions.

  Anything has use period, but LYHY ferris wheel bearing ,metallurgical bearing and mobile crane bearing can do our best to provide the best quality service.

Crane bearing and the ship crane bearing technical characteristics comparison

• Harbour mobile crane bearing.

The three row roller slewing bearing of port crane usually use internal or external toothing diameter 4 meters, to withstand overturning moment is very high.

• Stacker reclaimer and rotary bearing

Slewing bearing stacker reclaimer used usually adopts ball column combined type, three rows ofroller type and cross roller type, diameter of 3 meters most super. 

  Because of the poor working environment, dust, this kind of bearing has high carrying capacity, long service life, good sealingperformance characteristics. Considering the design of seal, uses the double sealing, plus steel protection sealing solution.

• The  ferris wheel bearing of large slewing bearing

LYHY bearings are used for the four point contact ball slewing bearing the ferris wheel.

• Ship unloader rotary bearing

Slewing bearing ship unloader with external teeth usually adopts three rows of rollers in structure,about 4-6 meters in diameter.

• Engineering machinery rotary bearing

Rotary bearing the most widely used most, generally not more than 4 meters in diameter, structure based on four point contact ball.

• Tower crane bearing

Application of rotary bearing the most concise, also called slewing bearings, ball and roller are to.

• Ladle Turntable Bearing

• Shield machine bearing 

The slewing bearing the most top application. High safety, high reliability, high stability, high value.

• Radar bearing

Belongs to the military bearing, is not introduced, quality is the first.

Find weakness,breakthrough bearing industry

Recent years, high speed bearing Rail, automobile, ship loader bearing and engineering machine industry of China is  rapidly developing. as the industry foundation  accessory equipment demand has increased dramatically, bearing opened  huge market demand space of China bearing industry.

The current bearing  produced in China and world industrial powers of production, where still exsits a  certain  gap .It mainly displays among the high technology, high precision bearing , high value added products the proportion of low, the stability of the product needs to be further improved and improvement.
   

Common sense of Ferris wheel

The Ferris wheel bearing , a structure composed of a rotating vertical wheel multi passenger component, in such a way, the rotation of the wheels on the edge, they remain upright, usually by gravity.

  Some of the largest modern mobile crane bearing is arranged on the rim, the electric motor rotate independently, upright every car. These wheels are sometimes referred to as observation wheels, whose cars are called capsule, however these alternative name, sometimes used with conventional gravity type vehicle wheel.

  The first Ferris wheel was built by George Washington gale Ferris, as small as, signs in the 1893 Chicago World Expo Kolumb. Ferris round of the term collectively referred to as all this structure, this is the type of now rides on national exhibition in the most common American.

Crane bearing and the ship crane bearing technical characteristics comparison

Slewing bearing is bearing the heavy industry is extremely important, diameter ranging from 10cm to 10 m, almost all of the large equipment to do reciprocating circular motion.

• Wind turbine slewing bearing

  Technical features: the yaw bearing is installed on the connecting part of the tower and cabin,variable paddle bearing installed in the root and the hub of each blade connecting parts. Each wind generator with a set of yaw bearing and three sets of variable pitch bearings. Yaw, pitch bearingmaterials selected 42CrMo, heat treatment using whole quenching and tempering treatment, the raceway surface quenching. The stress situation of yaw, pitch bearing complex, but also bear theshock and vibration is relatively large, therefore, requirements of bearing can bear the impact, but also can bear larger ship loader bearing.

  Wind turbine host life requirement of 20 years, the cost of installation and bearing large, therefore asked the yaw, pitch bearing life to reach 20 years. Bearing ring matrix hardness is 240-280HB,able to withstand shock and plastic deformation does not occur at the same time, the racewaysurface quenching hardness reaches 55-62HRC, which can increase the contact fatigue life, so as to ensure the long life of use requirements of bearing.

• The ship crane slewing bearing

The crane load bearing requirements of large, flexible rotation, relatively high speed, rotation of 270 degrees, the action to be fast, so the selection of internal tooth, double row ball slewing bearings. Crane bearing and the ship crane bearing technical characteristics comparison

•  Offshore platform crane bearing

According to the requirement of the bearing capacity of different, offshore platform crane often use four point contact ball slewing and the three row roller slewing bearing inner tooth.

Slewing bearing used in the offshore platform crane requires special material, the mechanical properties of the material to be able to ensure the safety coefficient of limit load, forging samplingCharpy impact experiment can achieve the average value of 42 J@-20 degrees C or 27J @ -40 C.Bearing finished product to Norske Veritas certification CCS.