For the pump products to use the bearings to help run, I believe we all have to understand, but the sleeve is also an important part of the pump, wear-resistant sleeve on the basis of anti-leakage is that we all understand, then for you A simple summary of the knowledge.

1, the pump rotor axial movement of large, auxiliary seal and the shaft of the large amount of interference, dynamic ring can not be flexible in the shaft to move. After the pump is turned, the static and static ring wear, the compensation displacement is not obtained.
2, the sealing surface of the lack of lubricating oil caused by dry friction or wool sealing end.
3, the rotor periodic vibration. The reason is that the stator is not aligned with the upper and lower ends or the impeller and spindle are not balanced, cavitation or bearing damage (wear), this situation will shorten the seal life and produce leakage.