Common periodic leakage solution for pumps

Common periodic leakage solution for pumps

1. The axial displacement of the pump rotor is large, the interference between the auxiliary seal and the shaft is large, and the moving ring cannot move flexibly on the shaft. After the pump is turned over and the moving and stationary rings are worn, the compensation displacement is not obtained.

Solution: When assembling the mechanical seal, the axial yaw of the shaft should be less than 0.1mm, and the interference between the auxiliary seal and the shaft should be moderate. While ensuring the radial seal, the dynamic ring pump can be matched on the shaft. Flexible movement (pressing the moving ring against the spring can bounce back freely).

2. Insufficient amount of lubricating oil on the sealing surface causes dry friction or brushed end faces.

Solution: The height of the lubricating oil in the chamber of the oil chamber should be added to the sealing surface above the dynamic and static rings.

3. The rotor periodically vibrates. The reason is that the stator is not centered with the upper and lower end caps or the impeller and the main shaft are unbalanced, cavitation or bearing damage (wear), which shortens the seal life and creates leakage.

Solution: The above problem can be corrected according to the maintenance standard.

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