The best way to deal with shaft misalignment in centrifugal pumps
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Our company has several centrifugal pumps equipped with mechanical seals, but these seals often leak due to shaft misalignment. The connection between the bearing and the bracket can be pulled apart by hand; let’s discuss what the best way to deal with this issue is.
Pitting can be done using a bracket, and the clearance of the bearing cover can be adjusted to control the play
The issue of shaft play must be addressed first; is it a single-stage pump or a multi-stage pump? For single-stage designs, a radial thrust ball bearing + NU bearing can be used, or horizontal holes can be cut in the impeller ； For multi-stage pumps, check the balance disk and balance pipes.
1: The inner ring of the bearing fits with the shaft, and the outer ring fits with the bearing housing. What is a bracket? If it refers to the degradation of the bearing housing, then it means the bearing is wearing out. Solutions: Create protrusions on the inner ring of the bearing housing. Second: A single-stage ordinary centrifugal pump should not have a cross-flow configuration. The outer ring of the bearing is pressed by the gland of the bearing housing, and the inner ring of the bearing is secured by a back cap – how can it be assembled? Three: It should be a double-support pump, or maybe a multi-stage centrifugal pump? So what is the total series resistance of this pump? How much have you set for the string division? IV: How to determine whether the mechanical seal leakage is caused by shaft misalignment? Is this a modular mechanical seal, or one with large springs and small springs? What is the compression amount of the mechanical seal?