Inappropriate lubricants, excessive load, excessive preload, excessive interference, foreign matter biting of metal powder, etc. can cause damage to the bearing. After bearing damage, fully understand the bearing usage and make clear The situation of the accident can be prevented from happening again when combined with bearing damage and various reasons. Here are the reasons for bearing damage and remedial measures.
Bearing peeling
Damage state: When the bearing is subjected to load rotation, the raceway surface or the rolling surface of the inner ring and the outer ring exhibits a fish scale-like peeling phenomenon due to rolling fatigue.
Reason: The load is too large. Poor installation (non-linear) torque load foreign matter intrusion, water ingress. Poor lubrication, improper lubricant clearance, improper bearing clearance. The accuracy of the bearing housing is not good, and the rigidity of the bearing housing is uneven, the deflection of the shaft is large, the rust, the erosion point, the scratch and the indentation (surface deformation phenomenon) are caused.
Measures: Check the size of the load and the bearing used in the re-inspection to improve the installation method to improve the sealing device and prevent rust during shutdown. Use a lubricant of appropriate viscosity to improve the lubrication method. Check the accuracy of the shaft and bearing housing. Check the clearance.
2. Bearing card injury
Damage state: The so-called card injury is a surface damage caused by a combination of minute burns generated in a sliding surface flaw. Linear flaws in the circumferential direction of the slide surface and the rolling surface. The tangential flaw of the roller end face is close to the pinch of the collar surface of the roller end face.
Reason: Excessive load, excessive preload. Poor lubrication. Foreign body bites into it. The inclination of the outer ring of the inner ring and the deflection of the shaft. The accuracy of the shaft and bearing housing is poor.
Action: Check the size of the load. Preload should be appropriate. Improve lubricants and lubrication methods. Check the accuracy of the shaft and bearing housing.
3. Bearing cracks, cracks
Damage state: The so-called crack refers to the crack damage caused by the race wheel or the rolling element. If it continues to be used, it will also include cracks that develop cracks.
Reason: Too much excess. Excessive load, impact load. Stripping has developed. Heat and fretting wear due to contact of the raceway wheel with the mounting member. The fever caused by creep. The cone angle of the cone shaft is poor. The cylindricity of the shaft is poor. The corner radius of the shaft step is larger than the bearing chamfer and causes interference with the bearing chamfer.
Measures: The amount of interference is appropriate. Check the load conditions. Improve the installation method. The shape of the shaft should be appropriate.
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