When the joint bearing is removed and inspected after the damage, the failure of the IKO bearing and the cause of the damage can be judged according to the damage of the bearing.
1. Rolling surface metal peeling
The bearing rolling elements and the inner and outer ring raceways are subjected to periodic pulsating loads, resulting in cyclically varying contact stresses. When the number of stress cycles reaches a certain value, fatigue peeling occurs on the rolling element or the inner and outer ring raceways. If the load on the IKO bearing is too large, this fatigue will be exacerbated. In addition, the bearing is not installed correctly, the shaft is bent, and the raceway is peeled off. Fatigue spalling of the bearing races reduces the accuracy of the shaft and causes vibration and noise in the mechanism.
2. Bearing burns
Burned bearings have a tempering color on the raceways and rolling elements. The causes of burns are generally insufficient lubrication, the quality of the lubricant does not meet the requirements or deterioration, and the bearing assembly is too tight.
3. Plastic deformation
Uneven pits appear on the contact surface between the raceway and the roller of the bearing, indicating that the bearing is plastically deformed. The reason for this is that under a large static load or impact load, the local stress of the working surface exceeds the yield limit of the material, which generally occurs on bearings rotating at low speed.
4. Bearing race crack
The cause of the crack in the bearing race may be that the bearing is too tight, the outer ring or the inner ring is loose, the bearing of the bearing is deformed, and the surface of the bearing is poorly machined.
5. The cage is broken
The reason is insufficient lubrication, broken rolling elements, and skewed races.
6. The metal of the cage adheres to the rolling elements
The possible cause is that the rolling elements are stuck in the cage or are insufficiently lubricated.
7. The raceway of the raceway is seriously worn
It may be that foreign objects are falling into the seat, the lubricating oil is insufficient or the lubricating oil grade is not suitable.
The main factors affecting the damage of the joint bearing are: load condition, lubrication condition, assembly condition, environmental condition and material or manufacturing precision.
After the joint bearing is installed, if it is not carefully aligned, alignment may result in additional load, friction and vibration of the bearing. These can accelerate fatigue and reduce bearing life and can damage the life of other machine parts. In addition, increased vibration and friction can greatly increase energy consumption and risk of premature failure.
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