Secondary oil system

Details Secondary oil system Secondary oil system

1988-10-31

1989-12-26

Stout, Donald E.

Power plants

Combustion products used as motive fluid

With lubricators

184 64, 184 611, F02C 706

Patent

active

048889474

ABSTRACT:
A secondary oil system for a flight propulsion gas turbine engine becomes operative only when engine fuel pressure is normal and engine primary oil pressure is abnormally low. The secondary oil system includes an air circuit having a mist circuit portion, a pilot operated air valve which normally blocks the air circuit, and a pilot valve responsive to fuel pressure and primary oil pressure to actuate the air valve. When the air circuit is unblocked, air flow in the mist circuit portion aspirates oil from a reservoir tank which oil is dispersed as a mist directed at a bearing in the sump.

REFERENCES:
patent: 3779345 (1973-12-01), Barnes et al.
patent: 4002224 (1977-01-01), Easter
patent: 4153141 (1979-05-01), Methlie
patent: 4284174 (1981-08-01), Salvana et al.
patent: 4309870 (1982-01-01), Guest et al.
patent: 4383421 (1983-02-01), Camboulives et al.
patent: 4390082 (1983-06-01), Swearingen
patent: 4433539 (1984-02-01), Norris et al.
patent: 4569196 (1986-02-01), Waddington et al.
patent: 4717000 (1988-01-01), Waddington et al.
patent: 4741155 (1988-05-01), McCarty

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