Hydrodynamic face seal with lift pads

Details Hydrodynamic face seal with lift pads Hydrodynamic face seal with lift pads

1987-08-17

1988-04-19

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 82, 277 87, 277 93SD, 277 961, F16J 1538

Patent

active

047384530

ABSTRACT:
An end face seal assembly having a seat and a nosepiece rotating relative thereto in which the nosepiece is fitted with a plurality of recesses that carry stool-like pads therein that operate as lift pads. A fluid dam is provided in association with the nose piece adjacent the lift pads. Essentially the lift pads have leg ligaments that permit the pads to rock under the action of pressure and friction to develop a wedge-like lift between the nosepiece and the seat. The ligaments may also be made flexible in a third direction to allow the pads to be equally loaded and be capable of adjusting for shaft misalignment.

REFERENCES:
patent: 1940779 (1933-12-01), Williams
patent: 2586739 (1952-02-01), Summers
patent: 2888281 (1959-05-01), Ratti
patent: 3169024 (1965-02-01), Johnson et al.
patent: 3559725 (1971-02-01), Fucinari et al.

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