Rotary face seal assembly

Details Rotary face seal assembly Rotary face seal assembly

2006-05-16

2006-05-16

Pickard, Alison K. (Department: 3673)

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

C277S401000, C277S408000

Reexamination Certificate

active

07044470

ABSTRACT:
A rotary seal assembly including a first member having a sealing face and a second member having a sealing face with a number of pumping grooves therein. At least a first set of pumping grooves stating proximate a center portion of the sealing face and extending outward and at least a second set of pumping grooves starting proximate the center portion of the sealing face and extending inward to direct fluid fed to the center portion of the sealing face simultaneously both inwardly and outwardly from the center portion of the sealing face to provide a uniform fluid film thickness between the sealing faces of the first and second members when one sealing face cones due to thermal and/or pressure effects.

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Zheng et al., “Adaptive Divert Double-Sprial Groove Face Seals for High Speed, High Temperature Applications.” American Institute of Aeronautics 00-3373 (2000).

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