Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1992-03-13
1993-07-27
Cuchlinski, Jr., William A.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277165, 277177, 277211, F16J 1516
Patent
active
052305201
ABSTRACT:
A hydrodynamically lubricated squeeze packing type rotary shaft with a cross-sectional geometry suitable for pressurized lubricant retention is provided which, in the preferred embodiment, incorporates a protuberant static sealing interface that, compared to prior art, dramatically improves the exclusionary action of the dynamic sealing interface in low pressure and unpressurized applications by achieving symmetrical deformation of the seal at the static and dynamic sealing interfaces. In abrasive environments, the improved exclusionary action results in a dramatic reduction of seal and shaft wear, compared to prior art, and provides a significant increase in seal life.
The invention also increases seal life by making higher levels of initial compression possible, compared to prior art, without compromising hydrodynamic lubrication; this added compression makes the seal more tolerant of compression set, abrasive wear, mechanical misalignment, dynamic runout, and manufacturing tolerances, and also makes hydrodynamic seals with smaller cross-sections more practical.
In alternate embodiments, the benefits enumerated above are achieved by cooperative configurations of the seal and the gland which achieve symmetrical deformation of the seal at the static and dynamic sealing interfaces. The seal may also be configured such that predetermined radial compression deforms it to a desired operative configuration, even through symmetrical deformation is lacking.
REFERENCES:
patent: 3970321 (1976-07-01), Dechavanne
patent: 3980309 (1976-09-01), Dechavanne
patent: 4089533 (1978-05-01), Knudson
patent: 4371177 (1983-02-01), Bahr et al.
patent: 4387902 (1983-06-01), Conover
patent: 4593914 (1986-06-01), Johnson
patent: 4610319 (1986-09-01), Kalsi
patent: 5040905 (1991-08-01), Boyd
Dietle Lannie
Gobeli Jeffrey D.
Cuchlinski Jr. William A.
Folker James K.
Jackson James L.
Kalsi Engineering, Inc.
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