Controller assembly
AssigneeROLLS-ROYCE plc
InventorChristopher A. Murray
Life of this patent
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Abstract
A controller assembly comprises an electromechanical actuator and a single-stage pneumatic flow switch configured to thermally protect the electromechanical actuator by a supply of cooling fluid. The single-stage pneumatic flow switch is movable between a first mode in which the switch is configured to open a cooling fluid flow passage and a second mode in which the switch is configured to close the cooling fluid flow passage. The electromechanical actuator is coupled to a valve movable between an open and a closed configuration.
Claims12
A controller assembly comprising:
- an electromechanical actuator;
- and
- a single-stage pneumatic flow switch configured to thermally protect the electromechanical actuator by a supply of cooling fluid;
- wherein the single-stage pneumatic flow switch is movable between a first mode in which the switch is configured to open a cooling fluid flow passage and a second mode in which the switch is configured to close the cooling fluid flow passage;
- wherein the electromechanical actuator is coupled to a valve movable between an open configuration and a closed configuration;
- and
- wherein the electromechanical actuator is disposed in a fluid flow outlet of the valve.
A controller assembly comprising:
- an electromechanical actuator;
- and
- a single-stage pneumatic flow switch configured to thermally protect the electromechanical actuator by a supply of cooling fluid;
- wherein the single-stage pneumatic flow switch is movable between a first mode in which the switch is configured to open a cooling fluid flow passage and a second mode in which the switch is configured to close the cooling fluid flow passage;
- wherein the electromechanical actuator is coupled to a valve movable between an open configuration and a closed configuration;
- wherein, when in the first mode, the single-stage pneumatic flow switch is configured to open a further fluid flow passage and, when in the second mode, the switch is configured to close the further fluid flow passage;
- wherein the further fluid flow passage is connected to a control chamber of the valve;
- wherein the further fluid flow passage is connected to a source of fluid at a higher pressure than the pressure across the valve to thereby pressurize the control chamber of the valve;
- and
- wherein the further fluid flow passage is connected to a source of fluid from an upstream side of the valve.
A gas turbine engine for an aircraft, the gas turbine engine comprising:
- an engine core comprising a turbine, a compressor, and a core shaft connecting the turbine to the compressor;
- a fan located upstream of the engine core, the fan comprising a plurality of fan blades;
- a controller assembly comprising:
- an electromechanical actuator;
- and
- a single-stage pneumatic flow switch configured to thermally protect the electromechanical actuator by a supply of cooling fluid;
- wherein the single-stage pneumatic flow switch is movable between a first mode in which the switch is configured to open a cooling fluid flow passage and a second mode in which the switch is configured to close the cooling fluid flow passage;
- and
- wherein the electromechanical actuator is coupled to a valve movable between an open configuration and a closed configuration.
Dependencies are inferred from the claim text.