rotation accuracy.
Wheel handpiece bearing are widely used in lifting the machinery, mining machinery, construction machinery, port machinery, shipbuilding, machinery and mechanical precision radar and missile launchers and other large rotating equipment.
Wheel bearings used in various fields.
1. Wind Turbine
The connecting portion of the tower with a yaw bearing is mounted in the cockpit, the pitch bearing is installed with the hub at the root portion of each blade is connected. Each wind generator with a yaw bearing and three pitch bearing. Yaw, pitch bearing ring material selection 42CrMo, heat treatment with the overall quenching, raceway surface hardening. Yaw, pitch bearing force the situation is complex, and to withstand shock and vibration is relatively large, and therefore, require both bearings to withstand the impact, but also bear a greater load. Wind turbines host life requirements of 20 years, a larger bearing installation costs, thus requiring yaw, pitch bearing life have reached 20 years. The matrix hardness of the bearing rings 240-280HB, able to withstand impact without the occurrence of plastic deformation, while the raceway surface quenching hardness 55-
62HRC, contact fatigue life can be increased, so as to ensure long bearing life
requirements.
2. Ship Cranes
Ship Cranes general use double Reducing ball, four-point contact ball bearing turntable Tri-row roller tooth structure, depending on the load carrying capacity, three-row roller wheel bearings typically used for heavy-duty cranes, four-point contact ball slewing and Reducing double ball bearing turntable for light cranes.
Since the crane at -20 ° C - +45 ° C under work environment, high class material bearing on the mechanical performance requirements.
3. offshore crane
Depending on the load capacity requirements, offshore crane usually using four-point contact ball slewing and three-row roller gear wheel bearings.
Application in offshore crane turntable bearing with special material requirements, the mechanical properties of the material to be able to guarantee the safety factor under extreme load, forging sample Charpy impact test to reach the average of 42J @ -20 ° C or 27J @ -40 ° C. Bearing Classification Society certification to be finished.
4. harbor mobile cranes
4 meters of harbor cranes usually use internal or external gear teeth diameter three-row roller slewing bearings to withstand high overturning moment.
5. Stacker Reclaimer
Reclaimer with column wheel bearings usually ball joint, three-row roller and cross-roller type, most ultra-three meters in diameter. Due to poor working conditions, dusty, these bearings have a high load capacity, long life, good sealing performance characteristics.
6. Ferris Wheel
For four-point contact ball bearing turntable Ferris wheel on the outside diameter of 4100mm, thickness 85mm
7. unloader
Unloader wheel bearings with external teeth usually three-row roller structure, about 4 meters in diameter.
8. Crane
Tower crane used wheel bearings usually small size four-point contact ball bearing turntable or dual volleyball dial diameter of not more than two meters.
9. The radar antenna
Shortwave antenna generally with three-row roller bearing turntable sub-structure, the rotation is slow.
10. TBM
Shield machine with turntable bearing diameters from 2.5 m to 6 m range, some larger diameter, these bearings working under very harsh conditions, bearing carrying a large load, corrosion resistance, short life.
11. ladle turret
Ladle turret slewing bearing usually with three-row roller structure, due to work under harsh conditions with dust and high temperature conditions, and on the holder, grease and seals have very high demands.
12. Construction Machinery
Wheel ring bearing typically used in construction machinery in a small four-point contact
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