In the process of using water ring vacuum pump, the abnormal noise of bearing sometimes occurs. If it is not handled in time, the motor of water ring vacuum pump will be damaged. So what are the main reasons for abnormal bearing noise of water ring vacuum pump?

1. There are impurities in the oil;

2. Insufficient lubrication (oil level is too low, improper storage leads to oil or grease leakage through the seal);

3. The clearance of bearing is too small or too large (factory problem);

4. Impurities such as sand or carbon particles are mixed into the bearing to play the role of abrasive;

5. The bearing is mixed with water, acid or paint and other dirt to play a corrosive role;

6. The bearing is clamped flat by the seat hole (the roundness of the seat hole is not good, or the seat hole is not straight);

7. The iron pad on the bottom surface of the bearing seat is uneven (resulting in deformation of the seat hole and even cracks in the bearing seat);

8. There are impurities in the bearing seat hole (residual chips, dust particles, etc.);

9. Eccentric sealing ring (contact with adjacent parts and friction);

10. The shaft is subjected to additional load (the shaft is subjected to axial tightness, or there are two fixed end bearings on one shaft);

11. The fit 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 it is too tight when rotating (the tightening sleeve is over tightened);

13. Bearing noise (caused by sliding of roller end face or steel ball);

14. The thermal elongation of the shaft is too large (the shaft bears the static and indeterminate axial additional load);

15. The shoulder of the shaft is too large (touching the seal of the bearing and causing friction);

16. The shoulder of the seat hole is too large (distort the seal of the bearing);

17. The clearance of labyrinth seal ring is too small (friction with shaft);

18. The teeth of the lock washer are bent (rubbing against the bearing);

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 knocking the bearing with a hammer during installation);

21. Bearing noise (external vibration source interference);

22. Bearing discoloration and deformation due to heating and disassembling the bearing with spray gun;

23. The shaft is too thick to make the actual fit too tight (resulting in excessive bearing temperature or noise);

24. The diameter of seat hole is too small (resulting in high bearing temperature);

25. The diameter of bearing seat hole is too large and the actual fit is too loose (bearing temperature is too high - outer ring 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. Cage broken.

28. The bearing raceway is rusty.

29. Wear of steel ball and raceway (unqualified grinding or bumping of products).

30. The raceway of ferrule is unqualified (factory problem).

The above is the water ring vacuum pump bearing abnormal noise of 30 reasons, when encountered in any case, must stop the operation of the water ring vacuum pump for inspection, in order to prevent damage to the vacuum pump.