35GEARED UNISON RING FOR MULTI-STAGE VARIABLE VANE ACTUATION
First Claim
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1. A variable vane system, comprising:
- an actuator;
a harmonic drive driven by the actuator;
a drive gear driven by the harmonic drive;
an extended geared unison ring driven by the drive gear;
a first variable vane stage with a multiple of actuator gears, each of the multiple of actuator gears mounted to a respective variable vane, each of the multiple of actuator gears driven by the extended geared unison ring.
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Abstract
An actuator system including a harmonic drive operable to drive a variable vane system of a gas turbine engine.
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Citations
18 Claims
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1. A variable vane system, comprising:
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an actuator; a harmonic drive driven by the actuator; a drive gear driven by the harmonic drive; an extended geared unison ring driven by the drive gear; a first variable vane stage with a multiple of actuator gears, each of the multiple of actuator gears mounted to a respective variable vane, each of the multiple of actuator gears driven by the extended geared unison ring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 18)
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13. A gas turbine engine, comprising:
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an actuator; a harmonic drive driven by the actuator; a drive gear driven by the harmonic drive; a first variable vane stage with a multiple of first actuator gears, each of the multiple of first actuator gears mounted to a respective variable vane of the first variable vane stage; and a second variable vane stage with a multiple of second stage actuator gears, each of the multiple of second stage actuator gears mounted to a respective variable vane of the second variable vane stage; an extended geared unison ring driven by the drive gear, wherein the extended geared unison ring spans at least a first variable vane stage and a second variable vane stage, each of the multiple of first and second stage actuator gears driven by the extended geared unison ring. - View Dependent Claims (14, 15, 16, 17)
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Specification