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Do you know the failure mechanism of rolling bearings?

2019-08-05 16:34
1. Abrasive wear
 
Because of the different working conditions of bearings, the wear and tear of bearings are also different. In normal working environment, there will also be abrasive particles (such as dust, sand and other hard particles) into the surface of the bearing; when the bearing works, the abrasive particles will treat the bearing surface as a grinding plane, which will damage the surface, so that the performance of the bearing will deteriorate sharply before life, mainly in the start, stop or shaft. When the edge contact occurs between the neck and the bearing, the anticipated life causes geometric shape change, precision loss and bearing clearance increase.
 
 
 
 
 
2. Fretting wear
 
When the rolling bearing is in a non-working state, due to the external vibration load, or in a slightly swinging condition, the relative motion of the rolling element near the contact area of the raceway will occur, because the motion range is very small. Lubricating oil can not be redistributed on the surface of contact zone, which makes the metal surface contact directly and interact with each other under the participation of oxygen, resulting in corrosion of metal surface and metal oxide debris. This phenomenon is called fretting wear of rolling bearings, which is inevitable wear caused by external environment.
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