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US 2019/0316484 A1Published application
Anti-windmilling system for a gas turbine engine
AssigneeUnited Technologies Corporation
InventorGary D. Roberge
Life of this patent
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Abstract
A gas turbine engine has an engine static structure and at least one component rotatable relative to the engine static structure about an engine axis of rotation. A fan is coupled to at least one component for rotation about the engine axis of rotation. An actuator is mounted to the engine static structure, wherein the actuator is activated to prevent the fan from rotation and is inactivated to allow the fan to rotate. A method for preventing rotation of a fan in a gas turbine engine is also disclosed.
Claims19
A gas turbine engine comprising:
- an engine static structure;
- at least one shaft that is driven by a turbine section and is rotatable relative to the engine static structure about an engine axis of rotation;
- a fan that is driven via a gear system by the at least one shaft for rotation about the engine axis of rotation;
- one or more sensors used to identify a non-operational engine condition that comprises at least a windmilling condition;
- a control that receives data from the one or more sensors to determine if an aircraft is on ground and is experiencing the windmilling condition by
- determining weight on wheels,
- determining if engine shut-down has been completed, and/or
- determining aircraft velocity to identify if the gas turbine engine is stationary;
- and
- an actuator mounted to the engine static structure aft of the turbine section, wherein the actuator is activated by the control to prevent rotation of the fan during the windmilling condition.
7 more elements
A gas turbine engine comprising:
- an engine static structure;
- at least one shaft rotatable relative to the engine static structure about an engine axis of rotation;
- a turbine section configured to drive the at least one shaft;
- a fan coupled to the at least one shaft via a geared architecture;
- at least one sensor used to identify an engine non-operational engine condition that comprises at least a windmilling condition;
- a control that receives data from the at least one sensor to determine if an aircraft is on ground and is experiencing the windmilling condition by
- determining weight on wheels,
- determining if engine shut-down has been completed, and/or
- determining aircraft velocity to identify if the gas turbine engine is stationary;
- and
- an actuator mounted to the engine static structure aft of the turbine section, wherein the actuator includes a first feature and the at least one shaft includes a second feature that selectively locks with the first feature when the actuator is activated by the control to prevent rotation of the at least one shaft during the windmilling condition.
8 more elements
Dependencies are inferred from the claim text.