Power plants – Combustion products used as motive fluid – With lubricators
Patent
1988-07-21
1989-08-15
Stout, Donald E.
Power plants
Combustion products used as motive fluid
With lubricators
184 62, 184 64, 184 611, 184 65, 384473, F02C 706
Patent
active
048562734
ABSTRACT:
A secondary oil system for a flight propulsion gas turbine engine having a vertical flight mode and a horizontal flight mode. The secondary oil system includes an annular secondary oil tank in a bearing sump of the engine adjacent a bearing to be lubricated, an oil inlet from the primary oil system of the engine into the secondary oil tank for filling the tank with a fraction of the oil flow in the primary oil system, a discharge orifice at the bottom of the secondary oil tank in each of the vertical and horizontal flight modes so that a gravity induced secondary oil flow constituting a small fraction of the oil flow in the primary system continuously issues from the secondary oil tank, a first partition in the secondary oil tank dividing the latter into a holding chamber which retains a volume of oil when the engine is shut down in the vertical flight mode after a normal landing and a descent reservoir open to the discharge orifice, and a second partition in the descent reservoir forming a standpipe over the discharge orifice in the horizontal flight mode so that the descent reservoir always contains a minimum volume of oil when the engine transitions from the horizontal to the vertical flight mode. If primary oil flow stops, the oil in the holding chamber sustains horizontal flight for an initial secondary duration and the oil in the descent reservoir sustains vertical flight for a final secondary duration for controlled descent.
REFERENCES:
patent: 3147821 (1964-09-01), Eggenberger
patent: 3779345 (1973-12-01), Barnes et al.
patent: 4153141 (1979-05-01), Methlie
patent: 4284174 (1981-08-01), Salvana et al.
patent: 4373421 (1983-02-01), Camboulives et al.
patent: 4390082 (1983-06-01), Swearingen
patent: 4511016 (1985-04-01), Doell
patent: 4564084 (1986-01-01), Heckel
patent: 4717000 (1988-01-01), Waddington et al.
patent: 4741155 (1988-01-01), McCarty
General Motors Corporation
Schwartz Saul
Stout Donald E.
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