CENTRIFUGAL PUMP

摘要

A centrifugal pump is provided, which includes a rotor assembly and a shaft. The rotor assembly includes an injection molded body and a shaft sleeve, the rotor assembly is injection molded taking the shaft sleeve as an injection molding insert, and the impeller injection molded body and the shaft sleeve are fixed by injection molding. The rotor assembly is rotatably supported on the shaft by the shaft sleeve, and the shaft sleeve is processed by injection molding or forging. The shaft sleeve is of a hollow structure, and the shaft sleeve includes a body. A central hole is formed in the body. The shaft sleeve further includes an impeller limiting portion configured to limit a rotating movement and an axial movement of the shaft sleeve with respect to the injection molded body.

主权项

1. A centrifugal pump, comprising a rotor assembly and a shaft, wherein the rotor assembly comprises an injection molded body and a shaft sleeve, the injection molded body comprises an impeller, the rotor assembly is formed by injection molding taking the shaft sleeve as an injection molding insert, the injection molded body is fixed to the shaft sleeve by injection molding, and the rotor assembly is rotatably supported on the shaft via the shaft sleeve, wherein:
the shaft sleeve is formed by injection molding, or formed by forging, or formed by forging and machining, or formed by extruding and machining, or formed by powder sintering, or formed by machining; the shaft sleeve comprises a body, a central hole is formed in the body of the shaft sleeve, the body of the shaft sleeve comprises an outer surface and an inner surface, the inner surface encloses to form the central hole, the shaft is arranged to pass through the central hole, and the outer surface is fixed by injection molding to the injection molded body; and the shaft sleeve further comprises an impeller limiting portion, the impeller limiting portion is arranged on the outer surface of the shaft sleeve, and the impeller limiting portion comprises at least one part of a portion where the shaft sleeve fits the injection molded body, and the impeller limiting portion is configured to limit a rotating movement and an axial movement of the shaft sleeve with respect to the injection molded body.