Non-contacting shaft sealing device

Details Non-contacting shaft sealing device Non-contacting shaft sealing device

1995-03-29

1996-06-25

DePumpo, Daniel G.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 81R, F16J 1534

Patent

active

055293182

ABSTRACT:
A non-contacting shaft sealing device in which an even-number of dynamic pressure generating groove groups are arranged in the peripheral direction thereof on a sealing end face of the seal case side or a sealing end face of the rotary shaft side. Each dynamic pressure generating groove group is composed of one or plural shallow L-shaped grooves of a specific groove width comprising a fluid lead-in part extending in the radial direction from a peripheral edge of high pressure side of said sealing end face and a dynamic pressure generating part extending in the peripheral direction from the end portion thereof. When the dynamic pressure generating groove group is composed of plural L-shaped grooves, those L-shaped grooves are arranged close to each other at an equal pitch without crossing each other such that the end portion of each dynamic pressure generating part is positioned on a fourth sealing end face diametral line. Each dynamic pressure generating groove group is symmetrical with respect to each of the adjacent dynamic pressure generating groove groups on both sides thereof around a first sealing end face diametral line passing between those fluid lead-in parts (between the fluid lead-in parts of the outermost side when the dynamic pressure generating groove group is composed of a plurality of the L-shaped grooves) or a second sealing end face diametral line passing between those dynamic pressure generating groove groups.

REFERENCES:
patent: 3640541 (1972-02-01), Taschenberg
patent: 5066026 (1991-11-01), Heck et al.
patent: 5092612 (1992-03-01), Victor et al.
patent: 5201531 (1993-04-01), Lai

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