Reasons for bearing failure

Bearing is an important part of today's mechanical equipment. Its main role is to support the mechanical rotating body, thereby reducing the friction coefficient during its movement and ensuring its rotation accuracy.

In real life, bearing damage or failure is usually the result of the interaction of various failure mechanisms. The cause of bearing failure can be caused by improper installation or maintenance, defects in the manufacture of the bearing and its surrounding components. In some cases, it may also be due to cost control or failure to accurately predict the operating condition of the bearing.

Bearing failure is a common problem in the running of bearings. Wear failure is one of the common failure modes of all kinds of bearings, which can be generally divided into the most common abrasive wear and viscous wear according to the wear form. Most bearing wear failure causes:

1. Maintenance is not in place, insufficient lubrication. Bearing heat from dry grinding.

2. Factors such as poor lubricating oil quality or poor use conditions lead to premature bearing wear.

Wear failure means that the relative sliding friction between surfaces causes the metal on the working surface to wear continuously, resulting in failure. Continuous wear will cause gradual damage to bearing parts, and eventually lead to the loss of bearing dimensional accuracy and other related problems.

Viscous wear refers to the uneven force of the friction surface due to the micro-bumps or foreign bodies on the friction surface, the selection of lubricating grease is not suitable for or in the serious deterioration of lubrication conditions, due to local friction heat generation, it is easy to lead to local deformation of the friction surface and friction micro-welding phenomenon, and in serious cases, the surface metal may be partially melted. The force on the contact surface will tear the local friction welding point from the matrix and increase the plastic deformation. This sticky - tear - viscous cycle process constitutes viscous wear, generally speaking, slight viscous wear is called abrasion, serious viscous wear is called bite.