Sickleless internal gear pump with radially movable sealing elem

Details Sickleless internal gear pump with radially movable sealing elem Sickleless internal gear pump with radially movable sealing elem

1993-03-17

1994-10-11

Bertsch, Richard A.

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

418171, F01C 1908

Patent

active

053541880

ABSTRACT:
The invention relates to a sickleless internal gear pump with an internal ring gear and a pinion meshing with the ring gear. The ring gear and pinion are rotatably mounted in a common housing part having an axial expanse corresponding to the width of the teeth of the ring gear and the pinion. The housing features a suction port and a pressure port. The ring gear features radial ports for the fluid medium to be pumped. Disposed in the pressure side region of the housing, opposite the rotating gearing parts of the ring gear and the pinion, is an axially movable axial disk exerting a force on the rotating gearing parts dependent on an axial pressure derived from the working pressure. The axially movable disk provides axial sealing by compensating for the gap between it and the fixed housing.

REFERENCES:
patent: 3496877 (1970-02-01), Eckerle et al.
patent: 3912427 (1975-10-01), Eckerle et al.
patent: 4801255 (1989-01-01), Wankel
patent: 4969806 (1990-11-01), Nusser

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