High pressure upstream pumping seal combination

Details High pressure upstream pumping seal combination High pressure upstream pumping seal combination

1980-03-31

1981-09-22

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277134, 277135, F16J 1516

Patent

active

042906113

ABSTRACT:
This specification discloses a dual seal combination for sealing the space between a housing and a shaft which passes through the housing. The combination is formed of an inboard seal and an outboard seal which are axially spaced from one another to define a buffer zone containing a buffer fluid. The inboard seal has radial faces provided with pumping grooves for sealing high pressure and for pumping buffer fluid from the buffer zone towards the upstream or high pressure side of the seal to lubricate the seal faces and to insure against leakage of fluid.

REFERENCES:
patent: 3834715 (1974-09-01), Butler
patent: 3894741 (1975-07-01), McHugh
patent: 3943717 (1976-03-01), Schexnayder

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