MULTISTAGE CENTRIFUGAL PUMP FOR PUMPING FLUID, AN IMPELLER/ SHAFT ASSEMBLY AND A METHOD FOR ASSEMBLING AN IMPELLER/ SHAFT ASSEMBLY
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United States of America
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Issued Date -
Mar 6, 2025
app pub date -
Jan 24, 2022
filing date -
Jan 24, 2022
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Abstract
A multistage centrifugal pump for pumping fluid includes a pump housing having a fluid inlet and a fluid outlet and a flow channel between the inlet and the outlet in the housing. The pump housing includes a number of pumping stages. A shaft is mounted by bearings for rotation about a center axis, and a number of impellers each including a hub having an axial opening are to be fitted on the shaft. When in operation, power is transmitted though the rotating shaft to the impellers, causing torque, radial forces and axial forces. Over the length of the shaft where the impellers are configured to be assembled, the shaft has a diameter that is smaller than the inner diameter of the hub and an adaptor ring is arranged in the axial opening of the hub to transmit the radial forces between the impeller and the shaft.
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