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US 2010/0163772 A1Published application
Actuator
AssigneeROLLS-ROYCE plc
InventorEric Mitchell Arnett
Life of this patent
Estimating the term…
Abstract
In one embodiment, a fluid driven actuation system is provided having a turbine and an actuation member with cooperating surfaces. In one form the fluid is fuel. The turbine may move when fluid is flowed through the actuation member thereby causing the actuation member to move by action of the cooperating threaded surfaces. A movable nozzle may also be provided to direct fluid flowing through actuation member and may be used to cause the turbine to move. A spring may be provided to create a biasing force in the nozzle.
Claims20
An apparatus comprising:
- a fuel system operable to produce a fuel flow;
- a screw assembly including a screw shaft and a screw follower, wherein the screw shaft and screw follower are threadingly coupled and are configured for relative movement;
- and
- a fluid flow path operable to accommodate a fuel flow from the fuel system, wherein the screw assembly produces relative movement when fuel flows through the fluid flow path.
1 more element
An apparatus comprising:
- a gas turbine engine having a moveable component;
- an actuator operable to produce motion in the moveable component, the actuator having a fuel flow path and a turbine, the turbine having a plurality of reactive surfaces operable to be rotated in an annular space, wherein the fuel flow path is transverse to the annular space, and wherein the actuator is operable to produce motion upon rotation of the turbine;
- and
- wherein the moveable component is moved when the turbine produces work.
1 more element
An apparatus comprising:
- a conduit operable to provide a fuel flow;
- an actuator having a fuel inlet and a fuel outlet, the actuator including an actuation member capable of moving between a first position and a second position;
- a reactive member operable to move when a fuel is moving within the actuator;
- means for directing a fuel flow, the means operable to modulate the reactive member;
- and
- wherein movement of the actuator is related to movement of the reactive member.
3 more elements
A method comprising:
- flowing a fuel to a rotary member of a gas turbine engine actuator;
- rotating the rotary member and causing a motive response in the gas turbine engine actuator;
- generating a movement in a gas turbine engine component coupled to the gas turbine engine actuator;
- and
- directing at least part of the fuel to a combustor after flowing the fuel to the gas turbine engine actuator.
2 more elements
Dependencies are inferred from the claim text.