Non-contacting shaft sealing device with grooved face pattern

Details Non-contacting shaft sealing device with grooved face pattern Non-contacting shaft sealing device with grooved face pattern

1993-12-02

1996-03-26

Cummings, Scott W.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

F16J 1534

Patent

active

055014704

ABSTRACT:
In a non-contacting shaft sealing device of the type wherein a sealing end face of a case seal and a sealing end face of a rotary shaft seal rotate relative to each other in a non-contacting state while being separated by a film of fluid derived from the high pressure region being sealed, one sealing end face is provided with an even number of dynamic pressure generating groove groups arranged in the peripheral direction on the sealing end face. Each dynamic pressure generating groove group has plural approximately L-shaped linear dynamic pressure generating grooves each composed of a fluid lead-in part extending in the radial direction from the peripheral edge of the sealing end face so as to communicate with the high pressure region, and a dynamic pressure generating part extending in the peripheral direction from the end portion of the fluid lead-in part with the dynamic pressure generating grooves not crossing each other and being arranged in the radial direction. Two adjacent dynamic pressure generating groove groups are symmetrical around the diametral line of the sealing end face.

REFERENCES:
patent: 4212475 (1980-07-01), Sedy
patent: 5066026 (1991-11-01), Heck et al.
patent: 5222743 (1993-01-01), Goldswain
patent: 5312117 (1994-05-01), Takenaka et al.

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