CENTRIFUGAL PUMP STAGE, CENTRIFUGAL PUMP AND USE OF A PUMP STAGE

摘要

The pump stage for a centrifugal pump comprises an impeller unit (10) having an axial hub and a diffuser unit (20) extended at a first face of said impeller unit (10). The impeller unit (10) is supported floating inside the diffuser unit (20). A shim ring (40) is associated with the impeller unit (10) and is sustained in sliding support on a washer (27) housed in a fixed position in a correspondent seat (26) of the diffuser unit (20) of an adjacent pump stage.

主权项

1. A pump stage for a centrifugal pump, comprising:
an impeller unit comprising an axial hub suitable to be mounted on a pump shaft of the centrifugal pump coaxial with the pump shaft; a diffuser unit extending at a first face of said impeller unit; an aspiration lid associated with said diffuser unit and extended at a second face of said impeller unit, said impeller unit floating inside said diffuser unit, said impeller unit being associated with a shim ring mounted fixed on said axial hub and sustained in sliding support on a washer housed in a fixed position in a correspondent seat of the diffuser unit of an adjacent pump stage, said impeller unit being in sliding contact with said aspiration lid, along an annular portion extended at said second face.