Inner diameter variable vane actuation mechanism
First Claim
1. A variable stator vane actuation system for use in a turbine engine having a first fan case having a first array of variable vanes and second fan case having a second array of variable vanes, the actuation system comprising:
- an inner diameter shroud for encasing an inner diameter synchronizing mechanism and receiving inner diameter ends of the first and second arrays of variable vanes;
a first drive vane arm for supplying a rotational force to a first drive vane of the first array of variable vanes;
a second drive vane arm for supplying a rotational force to a second drive vane of the second array of variable vanes; and
a linkage for connecting the first drive vane arm and the second drive vane arm to coordinate rotation of the first and second arrays of variable vanes.
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Accused Products
Abstract
A variable vane actuation mechanism is comprised of a first drive vane arm and a second drive vane arm for driving a first variable vane array and a second variable vane array, respectively, of a stator vane section of a gas turbine engine. The first drive vane arm and second drive vane arm are connected to each other at a first end by a linkage. The first drive vane arm and second drive vane arm are connected at a second end to a first drive vane and a second drive vane, respectively, of the first and second variable vane arrays. The first drive vane arm and second drive vane arm respond in unison to a single actuation source connected to one of the first drive vane arm and second drive vane arm.
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Citations
19 Claims
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1. A variable stator vane actuation system for use in a turbine engine having a first fan case having a first array of variable vanes and second fan case having a second array of variable vanes, the actuation system comprising:
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an inner diameter shroud for encasing an inner diameter synchronizing mechanism and receiving inner diameter ends of the first and second arrays of variable vanes; a first drive vane arm for supplying a rotational force to a first drive vane of the first array of variable vanes; a second drive vane arm for supplying a rotational force to a second drive vane of the second array of variable vanes; and a linkage for connecting the first drive vane arm and the second drive vane arm to coordinate rotation of the first and second arrays of variable vanes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A variable stator vane section for use in a turbine engine, the stator vane section comprising:
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a first assembly comprising; a first fan case; a first inner diameter vane shroud; a first drive vane rotatably positioned between the first fan case and the first inner diameter vane shroud; a first array of follower vanes rotatably positioned between the first fan case and the first inner diameter vane shroud; a first inner diameter synchronizing mechanism positioned within the first inner diameter vane shroud for coordinating rotation of the first array of follower vanes; and a first drive vane arm for rotating the first drive vane; a second assembly comprising; a second fan case; a second inner diameter vane shroud; a second drive vane rotatably positioned between the second fan case and the second inner diameter vane shroud; a second array of follower vanes rotatably positioned between the second fan case and the second inner diameter vane shroud; a second inner diameter synchronizing mechanism positioned within the second inner diameter vane shroud for coordinating rotation of the second away of follower vanes; and a second drive vane arm for rotating the second drive vane; an actuator; and a linkage for connecting the first drive vane arm and the second drive vane arm such that when one drive vane arm is rotated an amount by the actuator, the other drive vane arm is rotated a like amount, thereby coordinating the rotation of both the first and second variable vane arrays. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A variable vane actuation mechanism for a split vane array, the actuation mechanism comprising:
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first and second semi-circular vane casings assembled at outer diameter split lines to form an annular outer diameter casing; first and second semi-circular vane shrouds assembled at inner diameter split lines to form an annular inner diameter shroud; first and second arrays of follower vanes rotatably connected to the casing and the shroud; first and second drive vanes rotatably connected to the casing and the shroud and positioned adjacent an outer and an inner diameter split line and a follower vane; first and second synchronizing mechanisms disposed within the shroud and connected to the first and second arrays of follower vanes and the first and second drive vanes; and a linkage spanning an outer diameter split line to connect the first and second drive vanes to each other outside the casing.
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Specification