Industry News

Air compressor bearing abnormal sound caused by 30 reasons

Author : Runningway

Update time : 2019-08-05 16:06:32

1. Grease has impurities;
2, insufficient lubrication (oil level is too low, improper storage caused oil or grease leakage 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 pollutants, causing corrosion;
6. The bearing is flattened by the seat hole (the roundness of the seat hole is not good, or the seat hole is not twisted straight);
7. The horn of the bottom of the bearing seat is not flat (resulting in deformation of the seat hole or even cracks in the bearing housing)
8. There are debris in the bearing housing hole (residual chips, dust particles, etc.);
9. The seal ring is eccentric (touching adjacent parts and causing friction);
10. The bearing is subjected to additional load (the bearing is axially tightened, or there are two fixed end bearings on one shaft);
11. The matching table between the bearing and the shaft is too loose (the diameter of the shaft is too small or the tightening sleeve is not tightened);
12. The clearance of the bearing is too small, and the rotation is too tight (the tightening sleeve is too tight);
13, the bearing is noisy (the end of the roller or the ball is slipping);
14. The thermal elongation of the shaft is too large (the bearing is subjected to static and indeterminate axial additional load);
15, the shoulder is too large (touch the seal of the bearing and friction);
16. The shoulder of the seat hole is too large (the seal of the bearing is distorted);
18. The gap of the labyrinth seal is too small (friction with the shaft);
18. The teeth of the lock washer are bent (wearing the bearing and causing friction);
19. The position of the oil slinger is not suitable (the flange cover is encountered and friction occurs);
20. There is a pressure pit on the steel ball or roller (caused by hammering the bearing during installation);
21, the bearing has noise (with external vibration source interference);
22, the bearing is heated and discolored and deformed (caused by the use of a spray gun to disassemble the bearing);
23. The shaft is too thick to make the actual fit too tight (causing the bearing temperature to be too high or noise);
24, the diameter of the seat hole is too small (causing the bearing temperature is too high);
25, the bearing housing hole diameter is too large, the actual fit is too loose (bearing temperature is too high - outer ring slip);
26. The bearing housing hole becomes larger (the bearing hole of non-ferrous metal is enlarged, or becomes larger due to thermal expansion)
27. The cage is broken.
28. The bearing raceway is rusty.
29, steel ball, raceway wear (unqualified grinding or product damage).
30, the ferrule raceway is not qualified (manufacturer problem).

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