Seek advice on avoiding thermal expansion issues when installing multi-stage centrifugal pumps
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Dear experts, when installing multi-stage centrifugal pumps, is the gap between the outlet of the first-stage impeller and the guide vane larger than that of the second stage, and so on? Why? Thank you
On the motor side of a multi-stage pump, it’s the NU series of strip roller bearings, right? During operation, the pump expands in the direction of the motor; the more it gets close to the motor, the greater the amount of expansion that occurs. I’m not sure if this is the reason
To prevent pump cavitation, the inlet ring of the first impeller stage in a multi-stage centrifugal pump is larger in size than that of the subsequent stages; the clearance between the impeller inlet ring and the guide vane inlet ring is proportional to the diameter of the inlet ring