Do you know what are the failure mechanisms of rolling bearings?
1. Abrasive wear
Due to the different working conditions of the bearings, the wear conditions of the bearings are also different. Under normal working conditions, abrasive particles (such as dust, sand and other hard particles) will also enter the surface of the bearing; when the bearing is working, the abrasive particles will treat the bearing surface as a grinding plane, which will damage the surface. There can be cases where bearing performance deteriorates dramatically before life, mainly due to life-expected geometry changes, loss of accuracy, and increased bearing play during start-up, shutdown, or edge contact between the journal and the bearing.
2. Fretting wear
When the rolling bearing is in a non-working state, due to the action of external vibration loads, or when it is in a slight swing condition, the rolling elements will have a small relative movement near the contact area of the raceway, because the movement amplitude is small. The lubricating oil cannot be redistributed on the surface of the contact area, but the metal surface is in direct contact and interacts with the participation of oxygen, resulting in corrosion of the metal surface and generation of metal oxide wear debris. This phenomenon is called fretting wear of rolling bearings. This wear is inevitable wear caused by the external environment.