Integrated centrifugal pump and motor

Details Integrated centrifugal pump and motor Integrated centrifugal pump and motor

1991-11-08

1992-10-27

Bertsch, Richard A.

Pumps

Motor driven

Electric or magnetic motor

417355, F04B 1700, F04B 3504

Patent

active

051584409

ABSTRACT:
An integrated centrifugal pump and motor is provided by an impeller disk which contains permanent magnets and functions as the rotor for a brushless DC motor. The rotor is supported by non-contacting radial bearings and is hydrodynamically balanced against any axial thrust so that there is no contact between rotating and stationary elements during operation. Since the impeller disk is also the motor rotor, there is no need for a shaft, in the ordinary sense, which would penetrate the case and, thus, require seals. The resulting pump is compact and can be operated electronically at variable speeds.

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