Rolling bearing disassembly inspection, according to the bearing damage to determine the bearing failure and damage reasons.
Burned bearing its raceway, rolling on the tempering color. The cause of the burn is generally insufficient lubrication, the quality of the lubricating oil does not meet the requirements or deterioration, and the bearing assembly is too tight.
2. Roller surface metal flaking
Bearing rolling body and the inner and outer ring raceway surface are subjected to periodic pulsating load role, resulting in periodic changes in the contact stress. When the number of stress cycles to a certain value, in the rolling body or inner and outer ring raceway surface fatigue fatigue peeling. If the bearing load is too large, will make this fatigue intensified. In addition, the bearing is not installed, the shaft bending, will also produce roller off phenomenon.
The fatigue flaking of the bearing raceway reduces the operating accuracy of the shaft, causing vibration and noise to occur.
3. Plastic deformation
Bearing raceway and roller contact surface appears uneven pits, indicating bearing plastic deformation. The reason is that the bearing under a large static load or impact load, the working surface of the local stress exceeds the yield limit of the material, this situation generally occurs in low-speed rotating bearings.
4. bearing seat crack
Bearing seat ring cracks may be due to the bearing with too tight, the bearing foreign or inner ring loose, bearing the deformation of the package, the installation of the bearing surface of the poor processing.
5. Cage fragmentation
The reason is lack of lubrication, rolling broken, seat crooked and so on.
6. The metal of the retainer adheres to the rolling element
Possible reason is that the rolling element is caught in the cage or insufficient lubrication.
7. Seat roller raceway serious wear and tear
May be inside the seat ring into the foreign body, lack of lubricants or lubricants grades inappropriate.