The metallurgical quality of bearing materials used to be the main factor affecting the early failure of INA imported bearings. With the improvement of metallurgical technology (such as vacuum degassing of bearing steel, etc.), the quality of raw materials has improved. The proportion of raw material quality factors in the overall eccentric bearing failure analysis has dropped significantly, but it is still one of the main influencing factors of bearing failure. Whether the material selection is appropriate is still a factor that must be considered in bearing failure analysis.
The main task of bearing failure analysis is to find out the main factors causing the failure of INA imported bearings based on a large amount of background materials, analysis data and failure modes, so as to propose targeted improvement measures, extend the service life of imported bearings and avoid bearing failures. Sudden early failure.
Bearing vibration has a significant impact on bearing failure. For example: peeling, indentation, rust, cracks, wear, etc. will be reflected in the vibration detection of INA imported bearings. Therefore, the size of the vibration can be measured by using a special overall eccentric bearing vibration measurement device (frequency analyzer and vibration meter, etc.) The frequency distribution can be used to infer the details of abnormal vibration. The measured values vary depending on the use conditions of INA imported bearings or the installation position of the sensor. Therefore, it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment scale.
1. Reason: The overall eccentric bearing has low accuracy; Method: Select bearings with specified accuracy level.
2. Reason: The spindle is bent or the box hole is not concentric; Method: Repair the spindle or box.
3. Cause: The belt is too tight; Method: Adjust the belt to make it appropriately tight.
4. Reason: Poor lubrication; Method: Use the specified brand of lubricating material and clean it appropriately.
5. Reason: low assembly quality; method: improve assembly quality.
6. Reason: The inner and outer shell of the bearing is running in circles; Method: Replace the bearing and related wear parts.
7. The axial force is too large; method: clean and adjust the sealing ring clearance to 0.2~0.3mm, correct the diameter of the impeller balance hole and verify the static balance value.
8. The bearing is damaged; method: replace the INA bearing.
