Face seal with angled grooves and shallow annular groove

Details Face seal with angled grooves and shallow annular groove Face seal with angled grooves and shallow annular groove

1996-09-10

1997-12-30

DePumpo, Daniel G.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 81R, 277 96, F16J 1534

Patent

active

057021104

ABSTRACT:
A non-contacting grooved face seal for a shaft rotating at a high pressure and high speed with a combination of two groove patterns on one of the two sealing faces of mating sealing rings; one pattern being relatively deep angled grooves, and the other pattern begin a relatively shallow annular groove. The relatively deep groove pattern is optimized for hydrodynamic operation and on shaft rotation pumps the sealed fluid between the sealing faces to set the running clearance. The relatively shallow pattern is designed to hydrostatically prevent a friction lock of the sealing faces at starting and stopping of shaft rotation by admitting controlled amount of sealed fluid between the sealing faces when the shaft is at or near to a stationary condition.

REFERENCES:
patent: 3675935 (1972-07-01), Ludwig et al.
patent: 3804424 (1974-04-01), Gardner
patent: 3894741 (1975-07-01), McHugh
patent: 5201531 (1993-04-01), Lai
patent: 5556111 (1996-09-01), Sedy

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