Self-aligning sealing assembly for a rotating shaft

Details Self-aligning sealing assembly for a rotating shaft Self-aligning sealing assembly for a rotating shaft

1998-05-13

2000-11-14

Knight, Anthony

Seal for a joint or juncture

Seal between relatively movable parts

Close proximity seal

277421, 277422, F16J 15447

Patent

active

061458449

ABSTRACT:
A self-aligning, sealing assembly in accordance with the present invention includes a sealing apparatus and at least one preloading device. The sealing assembly is mounted in machinery which has a rotating shaft and a stationary member with an inner surface which is spaced from and surrounds a shaft. A slot is located in and extends around the inner surface of the stationary member. The slot has an upstream surface, a downstream surface, and an outer surface. The sealing apparatus is adjustably disposed in the slot and has an inner surface, an outer surface, an upstream surface and a downstream surface. Labyrinth seal teeth extend radially inward from the inner surface of the sealing apparatus. Each tooth is radially spaced from the shaft to form a non-contact seal. A space between the outer surface of the ring and the inner surface of the slot is designed to accommodate radial movement of the ring resulting from radial movement of the shaft. The preloading device has first and second ends, with the first end abutting the upstream surface of the slot and the second end abutting an opposing surface of the sealing apparatus. The preloading device ensures sufficient frictional forces between the ring and the slot to support the weight of the sealing apparatus when an insufficient pressure difference exists.

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