Secondary seal for non-contacting face seal assembly

Details Secondary seal for non-contacting face seal assembly Secondary seal for non-contacting face seal assembly

1994-12-02

1996-10-01

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277157, 277163, F16J 1538

Patent

active

055606229

ABSTRACT:
A non-contacting face seal assembly for a shaft rotating at high speed with an improved secondary seal for low axial drag force. The secondary seal comprises an O-ring with a compliant spring element at its outer circumference. The compliant spring provides a controlled radial force, which keeps the secondary seal in a more reliable sealing contact with the seal ring and the seal housing surface but avoids excessive radial forces so that low axial drag forces due to secondary seal displacements are generated to prevent sealing face hang-up.

REFERENCES:
patent: 3245692 (1966-04-01), Voitik
patent: 3592479 (1971-07-01), Andresen
patent: 4655462 (1987-04-01), Balsells
patent: 4768790 (1988-09-01), Netzel et al.
patent: 5058905 (1991-10-01), Nosowicz et al.
patent: 5172918 (1992-12-01), Pecht et al.
patent: 5174584 (1992-12-01), Lahrman
patent: 5217233 (1993-06-01), Pecht et al.
patent: 5370403 (1994-12-01), Sedy
patent: 5375855 (1994-12-01), Goldswain et al.
patent: 5388843 (1995-02-01), Sedy

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