Secondary oil system for gas turbine engine

Details Secondary oil system for gas turbine engine Secondary oil system for gas turbine engine

1989-04-03

1990-04-17

Lazarus, Ira S.

Lubrication

Systems

Gas turbine

184107, 415175, 60 3908, F01M 910

Patent

active

049172182

ABSTRACT:
A secondary oil system for a gas turbine engine includes a dual phase blocking member in a passage between an oil reservoir and a secondary orifice adjacent a bearing of the engine. The blocking member has a first phase at temperatures below a threshold temperature of the bearing in which the blocking member prevents secondary oil flow and a second phase at temperatures above the threshold temperature in which the blocking member permits secondary oil flow. Normally, primary oil flow maintains the bearing at an operating temperature below the threshold temperature so that secondary oil flow is normally blocked. After primary oil flow stops, the bearing temperature increases to the threshold temperature and the blocking member transitions to its second phase to initiate secondary lubrication.

REFERENCES:
patent: 526921 (1894-10-01), Gregg
patent: 995459 (1911-06-01), Henderson
patent: 3779345 (1973-12-01), Barnes et al.
patent: 4157881 (1979-06-01), Kasuya
patent: 4717000 (1988-01-01), Waddington et al.
patent: 4741155 (1988-01-01), McCarty

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