Abnormal sound of air compressor bearing caused by 30 reasons

Author : RUNNINGWAY

Update time : 2021-05-20 14:22:05

1. The grease has impurities;
2. Insufficient lubrication (the oil level is too low, improper storage causes oil or grease to leak through the seal);
3. The clearance of the bearing is too small or too large (manufacturer problem);
4. Impurities such as sand or carbon particles are mixed into the bearing to act as an abrasive;
5. The bearing is mixed with water, acid or paint and other dirt, which plays a corrosive effect;
6. The bearing is clamped flat by the seat hole (the roundness of the seat hole is not good, or the seat hole is twisted and not straight);
7. The pad iron on the bottom surface of the bearing seat is not flat (causing deformation of the seat hole and even cracks in the bearing seat);
8. There are debris in the bearing seat hole (residual chips, dust particles, etc.);
9. The sealing ring is eccentric (touching adjacent parts and causing friction);
10. The bearing is subjected to extra load (the bearing is tight in the axial direction, or there are two fixed-end bearings on one shaft);
11. The matching table of the bearing and the shaft is too loose (the diameter of the shaft is too small or the adapter sleeve is not tightened);
12. The clearance of the bearing is too small and it is too tight during rotation (the adapter sleeve is too tight);
13. The bearing is noisy (caused by the end face of the roller or the steel ball slipping);
14. The thermal elongation of the shaft is too large (the bearing is subjected to statically indeterminate axial additional load);
15.The shaft shoulder is too large (touching the seal of the bearing and causing friction);
16. The shoulder of the seat hole is too large (the seal of the bearing is distorted);
17.The gap of the labyrinth seal is too small (friction with the shaft);
18. The teeth of the lock washer are bent (touch the bearing and cause friction);
19.The position of the oil slinger is not suitable (touching the flange cover and causing friction);
20. There are pressure pits on the steel ball or roller (caused by hitting the bearing with a hammer during installation);
21. The bearing is noisy (with external vibration source interference);
22. The bearing is heated and discolored and deformed (caused by the use of a spray gun to heat the bearing and disassemble the bearing);
23. The shaft is too thick and the actual fit is too tight (causing too high bearing temperature or noise);
24. The diameter of the seat hole is too small (causing the bearing temperature to be too high);
25. The diameter of the bearing seat hole is too large, and the actual fit is too loose (the bearing temperature is too high-the outer ring is slipping);
26. The bearing seat hole becomes larger (the bearing seat hole of non-ferrous metal is enlarged or enlarged due to thermal expansion)
27. The cage is broken.
28. The bearing raceway is rusty.
29. Wear of steel balls and raceways (unqualified grinding or product bruises).
30. The raceway of the ferrule is unqualified (problem by the manufacturer).

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