Passive bearing clearance control using a pre-swirler

Details Passive bearing clearance control using a pre-swirler Passive bearing clearance control using a pre-swirler

2007-06-19

2007-06-19

Hannon, Thomas R. (Department: 3682)

Bearings

Rotary bearing

Antifriction bearing

C384S900000

Reexamination Certificate

active

11140118

ABSTRACT:
A rotary bearing for high speed and high temperature use is disclosed, the bearing having an inner race and an outer race with a roller ball positioned between the races, and a cooling fluid passageway passing through the races, where one of the passages in the outer race is directed radially inward toward the inner race and at substantially a tangent direction to the inner race, the tangential directed cooling passage providing a swirl to the cooling fluid such that the cooling fluid exits the outer race at a tangential velocity substantially equal to the rotational velocity of the inner race. Since the cooling fluid entering the inner race is traveling at a velocity substantially equal to the rotational velocity of the inner race, the temperature of the cooling fluid drops, and the cooling ability of the inner race is increased.

REFERENCES:
patent: 2854296 (1958-09-01), Eberle et al.
patent: 5192139 (1993-03-01), Hiramoto et al.
patent: 5749660 (1998-05-01), Dusserre-Telmon et al.
patent: 5915843 (1999-06-01), Mattera
patent: 6117063 (2000-09-01), Szepessy et al.

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