Patent ID: 8651836
Filing Date: 2014-02-18
Classification: F04D

Abstract:
1. A centrifugal pump assembly, comprising: a motor, a seal section and a pump; a rotatable shaft assembly extending through the motor, the seal section, and the pump; the pump has a plurality of sleeves, each of the sleeves having a bore that receives the shaft assembly; a torque-transmitting ring deformed between the bore of each of the sleeves and the shaft assembly, the deformation of the ring creating a frictional force sufficient to cause each of the sleeves to rotate in unison with the shaft assembly, wherein: the pump has a plurality of stages having a rotating impeller and a non rotating diffuser; and at least one of the sleeves comprises a hub of the impeller of at least one of the stages; at least one of the sleeves comprises a tubular spacer having a bore that receives the shaft assembly, the spacer having one end in engagement with the hub of one of the impellers and another end that transmits downward thrust from the impeller through the hub and the spacer to the diffuser.