Gear pump with pressure balancing structure

Details Gear pump with pressure balancing structure Gear pump with pressure balancing structure

1991-04-12

1992-09-08

Bertsch, Richard A.

Rotary expansible chamber devices

Interengaging rotating members

Like rotary members

F04C 208

Patent

active

051453495

ABSTRACT:
A gear pump which includes a pressure balancing structure to ensure balanced pressure within the pump chamber during low flow operation is disclosed. A groove is formed in the casing internal surface throughout the entire axial length of the gears and supplies high pressure fluid to positions within the pump chamber which are at a high pressure during normal flow operation. This groove thus ensures that high pressure fluid will be at all locations within the pump chamber which are expected to have high pressure during normal pumping operation. Forces on the gear are as expected during low flow operation, and that the gears will not be forced in an undesirable direction.

REFERENCES:
patent: 2624287 (1953-01-01), Ilyin
patent: 2820416 (1958-01-01), Compton
patent: 2871794 (1959-02-01), Mosbacher
patent: 3221663 (1965-12-01), Schofield et al.
patent: 3474736 (1969-11-01), Lauck
patent: 3528756 (1970-09-01), Norlin et al.
patent: 3781149 (1973-12-01), Weaver et al.
patent: 4087216 (1978-05-01), Shumate
patent: 4355964 (1982-11-01), Rodibaugh et al.
patent: 4781541 (1988-11-01), Sohler et al.

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