Hydrostatic seal for centrifugal pumps

Details Hydrostatic seal for centrifugal pumps Hydrostatic seal for centrifugal pumps

1979-03-19

1980-04-22

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 15, 277 27, 277173, F16J 1546

Patent

active

041991524

ABSTRACT:
The hydrostatic seal for high-differential pressure situations comprises an annular retainer plate having forward and aft ends for mounting the seal. To the annular retainer plate there is detachably mounted an annular seal housing having at least one purge fluid feed hole, at least one anti-rotation lug, and an annular aft end pressure restoration pocket. Coaxially located along the interior wall of the seal housing is an outer pressure gap interposed between the seal housing and a floating seal sleeve. The seal sleeve contains at least one purge fluid transfer hole radially located through the floating seal sleeve, an anti-rotation lug for mating with each anti-rotation lug of the seal housing, a plurality of inner pressure restoration pockets, and a pair of forward and aft axial seal balance lands. Coaxially located along the interior wall of the floating seal sleeve is an annular seal sleeve which rotates in conjunction with the rotating shaft. Interposed between the seal sleeve and the floating seal sleeve is an inner purge fluid gap which is capable of preventing the intrusion of high-pressure fluid into and through the seal.

REFERENCES:
patent: 3081095 (1963-03-01), Hamrick
patent: 3410565 (1968-11-01), Williams
patent: 3602613 (1971-08-01), Gunther
patent: 3606350 (1971-09-01), Gravelle
patent: 3650582 (1972-03-01), Casey
patent: 3701535 (1972-10-01), Born et al.
patent: 3806135 (1974-04-01), Wiese

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