Permanent magnet generator case vent valve
AssigneeHamilton Sundstrand Corporation
InventorAndrew P. Grosskopf
Life of this patent
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Abstract
An electric generator has a rotor shaft to be driven to rotate with a generator rotor. A generator stator is positioned adjacent the generator rotor. A housing surrounds the generator rotor and the generator stator. The generator rotor shaft extends outwardly of the housing. A seal seals a location where the rotor shaft extends outwardly of the housing. A vent valve is configured to vent of the interior of the housing when the rotor shaft is not rotating. An electrical assembly is also disclosed. An electrical assembly is also disclosed.
Claims20
An electric generator comprising:
- a rotor shaft to be driven to rotate with a rotor;
- a stator in operable communication with said rotor;
- a housing surrounding said rotor and said stator;
- said rotor shaft extending outwardly of said housing, and a seal sealing a location where said rotor shaft extends outwardly of said housing;
- a vent valve, separate from said seal, and configured for allowing venting of the interior of said housing when said rotor shaft is not rotating;
- and
- said vent valve is electrically operated such that electrical power is sent to said vent valve when said rotor shaft is rotating to maintaining said vent valve in a non-venting position, and the supply of electrical power to said vent valve is stopped such that said vent valve is biased to a vent position when said rotor shaft is not rotating.
An electric generator comprising:
- a rotor shaft to be driven to rotate with a rotor;
- a stator in operable communication with said rotor;
- a housing surrounding said rotor and said stator;
- said rotor shaft extending outwardly of said housing, and a seal sealing a location where said rotor shaft extends outwardly of said housing;
- a vent valve, separate from said seal, and configured for allowing venting of the interior of said housing when said rotor shaft is not rotating;
- and
- wherein said rotor shaft extends outwardly of said housing into a gearbox and said vent valve vents said interior of said housing into an interior of said gearbox.
An assembly comprising:
- a gas turbine engine driving an output shaft, said output shaft extending to drive an electric generator, and said electric generator is configured to generate electricity for a use on an aircraft;
- said electric generator including a rotor shaft coupled to be driven by said output shaft, and said rotor shaft to be driven to rotate with a rotor;
- a stator in operable communication with said rotor;
- a housing surrounding said rotor and said stator;
- said rotor shaft extending outwardly of said housing, and a seal sealing a location where said rotor shaft extends outwardly of said housing;
- a vent valve, separate from said seal, and configured for allowing venting of the interior of said housing when said rotor shaft is not rotating;
- and
- said vent valve is electrically operated such that electrical power is sent to said vent valve when said rotor shaft is rotating to maintain said vent valve in a non-venting position, and the supply of electrical power to said vent valve is stopped such that said vent valve is biased to a vent position when said rotor shaft is not rotating.
Dependencies are inferred from the claim text.