Nozzle with variable throat and exit areas
AssigneeROLLS-ROYCE plc
InventorsJonathan V Watson, Jack F Colebrooke
Life of this patent
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Abstract
A nozzle for a gas turbine engine. An array of convergent petals hingedly coupled to a nozzle exit of fixed diameter. An array of divergent petals, each divergent petal hingedly coupled to one of the array of convergent petals. A cam surface associated with the array of convergent petals. A pivot point coupled to the array of divergent petals by a first linkage and to a fixed point by a second linkage. A cam follower coupled to the second linkage by a third linkage, the cam follower arranged to abut and travel in contact with the cam surface. An actuator coupled to the cam follower and arranged to translate the cam follower along the cam surface to move the convergent and divergent petals.
Claims14
A nozzle for a gas turbine engine comprising:
- an array of convergent petals hingedly coupled to a nozzle exit of fixed diameter;
- an array of divergent petals, each divergent petal hingedly coupled to one of the array of convergent petals;
- a cam surface associated with the array of convergent petals;
- a pivot point coupled to the array of divergent petals by a first linkage and to a fixed point by a second linkage;
- a cam follower coupled to the second linkage by a third linkage pivotably coupled to the cam follower, the cam follower arranged to abut and travel in contact with the cam surface;
- and
- an actuator coupled to the cam follower and arranged to translate the cam follower along the cam surface to move the convergent and divergent petals,
- wherein the cam surface comprises a first portion and a second portion, the first and second portions forming a convex surface;
- the first portion arranged to maintain a nozzle throat area and the second portion arranged to change the nozzle throat area.
A nozzle for a gas turbine engine comprising:
- an array of convergent petals hingedly coupled to a nozzle exit of fixed diameter;
- an array of divergent petals, each divergent petal hingedly coupled to one of the array of convergent petals;
- a cam surface associated with the array of convergent petals;
- a pivot point coupled to the array of divergent petals by a first linkage and to a fixed point by a second linkage;
- a cam follower coupled to the second linkage by a third linkage such that the cam follower is configured to push and pull the second linkage via the third linkage, the cam follower arranged to abut and travel in contact with the cam surface;
- and
- an actuator coupled to the cam follower and arranged to translate the cam follower along the cam surface to move the convergent and divergent petals.
Dependencies are inferred from the claim text.