Contactless pressurizing-gas shaft seal

Details Contactless pressurizing-gas shaft seal Contactless pressurizing-gas shaft seal

1994-05-24

1995-07-25

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 92, F16J 1534

Patent

active

054355745

ABSTRACT:
A high pressure sealing arrangement of the type in which a rotor sealing ring end face generates a gas pressure with a stator sealing ring end face at a functional gap between a cylindrical portion of the seal housing and the stator sealing ring bridged by an O-ring of reduced hardness. The gap width is less than 0.4 mm and preferably less than 0.3 mm. The sealing O-ring additionally serve as a compensation or centering ring and has a material hardness which is greater than the extrusion threshold of this material through the gap and is less than a hardness of 90 Shore A according to German Industrial Standard DIN 53505. Preferably the hardness of the O-ring is less than 80 Shore A under this Standard.

REFERENCES:
patent: 3199795 (1965-08-01), Bennett et al.
patent: 3744805 (1973-07-01), Heinrich
patent: 4212475 (1980-07-01), Sedy
patent: 4335888 (1982-06-01), Ohba et al.
patent: 4457521 (1984-07-01), Morley
patent: 4582366 (1986-04-01), Burfield et al.
patent: 5090712 (1992-02-01), Pecht et al.
patent: 5092612 (1992-03-01), Victor et al.
patent: 5222743 (1993-06-01), Goldswain et al.

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