Mechanical face seal having centering means

Details Mechanical face seal having centering means Mechanical face seal having centering means

1987-05-22

1988-09-06

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 82, 277 84, 277 93SD, F16J 1534

Patent

active

047687908

ABSTRACT:
A mechanical seal for use between a housing and a rotatable shaft supported by the housing, having adjacent annular primary and mating sealing rings, each ring having a generally radial sealing face. Means seals and holds the first sealing ring nonrotatably relative to the housing, and means seals and holds the second sealing ring to rotate with the shaft. One sealing ring is movable axially of the shaft, and springs urge this one ring toward the other sealing ring, which is axially fixed relative to the shaft. The axially moveable seal ring is centered coaxially with respect to the axis of the seal ring through engagement of a centering element which is centered relative to the shaft and which engages the axially moveable sealing ring to center it relative to the shaft. The centering element engages the axially moveable sealing ring to effect such centering at the periphery of the axially moveable ring exposed to the pressurized fluid to be sealed.

REFERENCES:
patent: 3502343 (1970-03-01), Pustelnik
patent: 3675933 (1972-07-01), Nappe
patent: 3807742 (1974-04-01), Hershey
patent: 3918724 (1975-11-01), Alley
patent: 4415165 (1983-11-01), Martini

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