Secondary oil system
This patent describes a gas turbine engine. It comprises a source of compressed air, a rotor bearing in a bearing sump of the engine, and a primary oil system for lubricating the rotor bearing with oil at a primary oil system pressure when the engine is operating normally, a secondary oil system comprising: a reservoir in the bearing sump, means defining an oil inlet between the primary oil system and the reservoir for filling the reservoir with oil from the primary oil system, a mist tube in the reservoir having a first end connected to the compressed air source and a second end connected to a secondary oil system nozzle in the bearing sump, means defining a first orifice in the mist tube at a first elevation relative to the bottom of the reservoir and above the elevation of the secondary oil system nozzle relative to the bottom of the reservoir, means defining a pick-up tube for conducting oil from the reservoir near the bottom thereof to the first orifice, a shut-off valve means in the mist tube between the first orifice and the first end of the mist tube responsive to the primary system oil pressure to block the mist tube.
- Assignee:
- General Motors Corp., Detroit, MI (United States)
- Patent Number(s):
- US 5046306; A
- Application Number:
- PPN: US 7-556689
- OSTI ID:
- 5661897
- Resource Relation:
- Patent File Date: 23 Jul 1990
- Country of Publication:
- United States
- Language:
- English
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