Integral motor and pump

Details Integral motor and pump Integral motor and pump

1992-04-27

1993-05-11

Bertsch, Richard A.

Pumps

Motor driven

Pump within rotary working member

417365, 4174235, 4151995, 384115, F04B 3504

Patent

active

052096505

ABSTRACT:
A pump integral with an electric motor has an integral rotor and impeller assembly that rotates within a stator casing and is supported on hydrostatic radial and thrust bearings. The pump avoids having to provide external seals or friction type bearings. The unit has a stator with windings therein contained within a pump casing which has an axial liquid entry and a liquid outlet. An integral rotor and impeller assembly is mounted for rotation on a fixed axial shaft within the stator. The integral rotor and impeller assembly is positioned axially relative to the stator casing by hydrostatic thrust bearings where the pressure for the thrust bearing fluid is generated by radial ducts located within the integral rotor and impeller assembly.

REFERENCES:
patent: 4919549 (1990-04-01), Lawson et al.

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