Structure and Application of wheel bearings

There are a variety of structural types of wheel bearings, if no gear, external tooth and internal tooth four-point contact ball bearings, double row angular contact ball bearings, cross cylindrical roller bearings, tapered roller bearings and cross three rows Cylindrical roller bearings. Wherein the four-point contact ball bearings with high static load capacity; Cross cylindrical roller bearings with high dynamic load capacity; cross tapered roller bearings preloaded by make bearings with a larger supporting rigidity and high rotation accuracy.
 
Wheel bearings widely used in lifting machinery, mining machinery, construction machinery, port machinery, shipbuilding, machinery and mechanical precision radar and missile launchers and other large rotary device. The following is a wheel bearing applications in various fields:
 
Construction Machinery. Typically in a small four-point contact ball bearing turntable, diameter of not more than two meters.
 
Marine cranes. General use double Reducing ball, four-point contact ball turntable within three row roller bearing tooth structure. The mechanical properties of the material are higher.
 
Wind Turbines. Each wind turbine with a yaw bearing and three pitch bearings. It requires both bearings to withstand the impact, but also bear a greater load.
 
Offshore crane. Depending on the load carrying capacity requirements, usually using four-point contact ball turntable and Tri-row roller gear wheel bearings.
 
Mobile harbor cranes. 4 meters is usually provided with external gear teeth or the diameter of three-row roller slewing bearings to withstand high overturning moment.
 
Stacker-reclaimer. Due to poor working conditions, dusty, these bearings have high load capacity, long life, good sealing performance characteristics.
 
Ferris wheel. For four-point contact ball bearing turntable on the Ferris wheel, the outer diameter of 4100mm, thickness 85mm
 
Unloader. Turntable bearings with external teeth usually three-row roller structure, approximately four meters in diameter.
 
Crane. Tower machine turntable bearings are usually in a small four-point contact ball bearing turntable or double volleyball dial, no more than two meters in diameter.
 
Radar antenna. Shortwave antennas are generally used three-row roller bearing turntable substructure rotational speed.
 
Shield. These bearings under very poor conditions of work, bearing bearing load, corrosion resistance, short life.
 
Ladle turret. Usually three-row roller structure, due to work under harsh conditions with dust and high temperature conditions, the on retainer, grease and seals have high demands.