A variable vane assembly includes a damper positioned between a platform and a trunnion. The damper is comprised of a resilient material.
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1. A variable vane damper, comprising: a body comprised of a resilient material, the body including a first surface that is bondable to an inner platform of a variable vane and a second surface that is bondable to an inner diameter trunnion component. 2. The variable vane damping assembly of claim 1
1. A variable vane damper, comprising: a body comprised of a resilient material, the body including a first surface that is bondable to an inner platform of a variable vane and a second surface that is bondable to an inner diameter trunnion component. 2. The variable vane damping assembly of claim 1, wherein the body is comprised of an elastomeric material. 3. The variable vane damping assembly of claim 1, wherein the body is comprised of silicon rubber material. 4. The variable vane damping assembly of claim 1, wherein the body comprises a solid disc-shaped member. 5. The variable vane damping assembly of claim 1, wherein the damper comprises a connecting element that is configured to attach the inner platform to the inner diameter trunnion component to provide the variable vane that is pivotable about a vane axis. 6. The variable vane damping assembly of claim 5, wherein a thickness of the damper is controlled such that an overall length of the variable vane assembly falls within a predetermined tolerance range. 7. A variable vane assembly, comprising: a variable vane body;a platform formed at one end of the variable vane body; a damper bonded to the platform; and a trunnion bonded to the damper. 8. The variable vane assembly of claim 7, wherein the variable vane body has a radially inner end and a radially outer end relative to a central axis of a turbomachine, and wherein the platform is formed at the radially inner end of the variable vane body. 9. The variable vane assembly of claim 8, wherein the damper includes a radially outer surface that is bonded to the platform and a radially inner surface that is bonded to the trunnion. 10. The variable vane assembly of claim 7, wherein the variable vane is positioned within a compression section of a geared turbine engine. 11. The variable vane assembly of claim 7, wherein the trunnion, the platform, and the damper rotate together with the variable vane body. 12. The variable vane assembly of claim 7, wherein the damper is comprised of a resilient material. 13. The variable vane assembly of claim 12, wherein the variable vane body is comprised of a metallic material. 14. The variable vane assembly of claim 13, wherein the trunnion is comprised of a metallic material. 15. The variable vane assembly of claim 13, wherein the trunnion is comprised of a plastic material. 16. The variable vane assembly of claim 7, wherein the variable vane body comprises a separate component from the trunnion, and wherein the damper comprises a connecting element that connects the variable vane body to the trunnion to form a variable vane that is pivotable about a vane axis. 17. The variable vane assembly of claim 16, wherein the trunnion includes an enlarged flange portion and a pivot portion that defines the vane axis, and wherein the damper includes a first surface and second surface opposite the first surface in a direction along the vane axis, and wherein one of the first and second surfaces is bonded directly to an end surface of the enlarged flange portion and the other of the first and second surfaces is bonded directly to an end surface of the platform that faces the end surface of the enlarged flange portion. 18. The variable vane assembly of claim 7, wherein the variable vane body has a radially inner end and a radially outer end relative to a central axis of a turbomachine, and wherein the platform is formed at one of the radially inner and outer ends to provide a first attachment surface, and wherein the trunnion includes an enlarged flange portion and a pivot portion that defines a vane pivot axis, the enlarged portion providing a second attachment surface that faces the first attachment surface, and wherein the damper is bonded directly to the first and second attachment surfaces to connect the variable vane body to the trunnion, and wherein a thickness of the damper is controlled such that an overall length of the variable vane assembly from the radially outer end to the pivot portion falls within a predetermined tolerance range. 19. The variable vane assembly of claim 18, wherein the damper comprises a solid disc-shaped member having first and second opposing mount surfaces in a direction along the vane pivot axis, and wherein the first and second opposing mount surfaces are respectively bonded to the first and second attachment surfaces. 20. A method of assembling a variable vane assembly, comprising: (a) positioning a variable vane body in a first fixture, the variable vane body including a platform at a radially inner end;(b) positioning a trunnion in a second fixture;(c) placing a damper between the trunnion and platform, the damper comprised of an elastomeric material;(d) squeezing the first and second fixtures together; and(e) curing the elastomeric material to bond the damper to the platform and the trunnion. 21. The method of claim 20, wherein step (c) includes injecting a liquid elastomeric material between the platform and the trunnion. 22. The method of claim 20, wherein step (c) includes positioning a pre-molded disc between the platform and the trunnion. 23. The method of claim 20, wherein the variable vane body comprises a separate piece from the trunnion during steps (a) and (b), and wherein the damper comprises a connecting component that connects the variable vane body to the trunnion during step (e). 24. The method of claim 23, including forming the trunnion to have an enlarged flange portion and a pivot portion, and positioning the damper directly between the platform and the enlarged flange portion. 25. The method of claim 20, including controlling the thickness of the damper such that an overall length of the variable vane assembly falls within a predetermined tolerance range. 26. The method of claim 25, wherein a thickness of the damper is controlled to provide +/−0.002 inches tolerance for a finished part height.
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이 특허에 인용된 특허 (11)
Grant, Carl; Douglas, David Curr; Payling, Stephen Rex; Vota, James, Apparatus and method for damping vibrations between a compressor stator vane and a casing of a gas turbine engine.
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