Dual direction windmill pump for geared turbofan engines
AssigneeRaytheon Technologies Corporation
InventorJacob Peter Mastro
Life of this patent
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Abstract
A lubrication system may comprise a shaft including a shaft gear, a pump configured to supply a flow of lubricant to a component benefiting from lubrication and an input gear train coupled to the shaft gear and configured to drive the gear pump with a unidirectional rotation in response to a forward rotation and an reverse rotation of the shaft gear. The input gear grain may comprise a primary gear coupled to a common shaft. The input gear train may further comprise a forward shaft and a forward gear about the common shaft, wherein the forward gear is coupled to the forward shaft.
Claims14
A lubrication system comprising;
- a fan shaft including a fan shaft gear;
- a pump configured to supply a flow of lubricant to a component benefiting from lubrication;
- and
- an input gear train coupled to the fan shaft gear and configured to drive the pump with a unidirectional rotation in response to a forward rotation and a reverse rotation of the fan shaft gear,
- wherein the input gear train further comprises:
- a common shaft;
- a primary gear fixed to the common shaft;
- a forward shaft;
- a forward gear fixed to the forward shaft;
- a reverse shaft;
- and
- a single reverse gear fixed to the reverse shaft,
- wherein each of the forward shaft, the reverse shaft, the forward gear, and the reverse gear, are concentric about the common shaft.
A gas turbine engine comprising:
- a compressor section configured to compress a gas;
- a combustor section aft of the compressor section configured to combust the gas;
- a turbine section aft of the combustor section configured to extract work from the combusted gas;
- and
- a lubrication system comprising:
- a fan shaft including a fan shaft gear;
- a pump configured to supply a flow of lubricant to a component benefiting from lubrication;
- and
- an input gear train coupled to the fan shaft gear and configured to drive the pump with a unidirectional rotation in response to a forward rotation and a reverse rotation of the fan shaft gear,
- wherein the input gear train further comprises:
- a common shaft;
- a primary gear fixed to the common shaft;
- a forward shaft;
- a forward gear fixed to the forward shaft;
- a reverse shaft;
- and
- a single reverse gear fixed to the reverse shaft,
- wherein each of the forward shaft, the reverse shaft, the forward gear, and the reverse gear, are concentric about the common shaft.
Dependencies are inferred from the claim text.