[특허]Methods and apparatus for sealing gas turbine engine variable vane assemblies

General Electric Company

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특허 상세정보

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Methods and apparatus for sealing gas turbine engine variable vane assemblies

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01D-009/02
미국특허분류(USC)	415/160; 415/191
출원번호	US-0322116 (2002-12-17)
발명자 / 주소	O'Reilly, Daniel Padraic Mesing, Thomas Carl Dingwell, William Terence
출원인 / 주소	General Electric Company
대리인 / 주소	Andes William Scott
인용정보	피인용 횟수 : 14 인용 특허 : 10

초록
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A method enables a variable vane assembly for a gas turbine engine including a casing to be assembled. The variable vane assembly includes a seal assembly and at least one variable vane that includes a platform and a trunnion, wherein the platform extends outwardly from the trunnion. The method comprises coupling a seal assembly journal bushing to the variable vane such that the journal bushing is against the trunnion and between the trunnion and the engine casing, and wherein the journal bushing has a substantially constant diameter extending between a ...

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1. A method for assembling a variable vane assembly for a gas turbine engine including a casing, the variable vane assembly including a seal assembly and at least one variable vane that includes a platform and a trunnion, wherein the platform extends radially outwardly from the trunnion, said method comprising:coupling a seal assembly journal bushing to the variable vane such that the journal bushing is against the trunnion to prevent contact between the trunnion and the engine casing, and wherein the journal bushing has a substantially constant diameter extending between a first end and a second end of the journal bushing;positioning a first washer on the platform to prevent contact between the variable vane assembly and the engine casing, wherein the first washer is substantially flat and contacts the seal assembly journal bushing;positioning a second washer in contact with the trunnion and adjacent the journal bushing second end such that the second washer and the journal bushing are separated by a substantially uniform gap defined therebetween: andpositioning the variable vane assembly within an opening extending through the engine casing, and such that variable vane assembly trunnion extends through the opening. 2. A method in accordance with claim 1 further comprising positioning a second substantially flat washer adjacent the journal bushing to prevent contact between the engine casing and a spacer coupled to the variable vane assembly. 3. A method in accordance with claim 2 wherein positioning a second substantially flat washer adjacent the journal bushing further comprises positioning a journal bushing to the variable vane that has a thickness that is greater than a thickness of the first washer and the second washer. 4. A method in accordance with claim 2 wherein positioning a second substantially flat washer adjacent the journal bushing further comprises positioning a journal bushing to the variable vane that is fabricated from a first material that is different from a second material used to fabricate at least one of the first and second washers. 5. A variable vane assembly for a gas turbine engine including a casing, said variable vane assembly comprising:a variable vane comprising a platform and a trunnion, said platform extending outwardly from said trunnion and comprising an outer wall defining an outer periphery of said platform, and a radially outer surface extending from said outer wall to said trunnion; anda seal assembly comprising a journal bushing, a first washer, and a second washer, said journal bushing comprising a first end, a second end, and a substantially cylindrical body extending between said first and second ends, such that a diameter of said body is substantially constant between said first and second ends, said journal bushing in contact with at least one of said variable vane platform and said first washer for preventing contact between said trunnion and the engine casing, said first washer substantially flat and extending from said platform outer wall towards said trunnion, said first washer configured to prevent contact between said variable vane platform radially outer surface and the engine casing, said second washer is substantially planar and contacts said trunnion such that said journal bushing second end and said second washer are separated by a substantially uniform gap that is defined therebetween. 6. A variable vane assembly in accordance with claim 5 wherein, said first washer adjacent said journal bushing first end. 7. A variable vane assembly in accordance with claim 6 wherein said seal assembly journal bushing fabricated from a first material, at least one of said first and said second washer fabricated from a second material different than said journal bushing first material. 8. A variable vane assembly in accordance with claim 6 further comprising a spacer comprising a first portion and a second portion, said first portion contacting a portion of said trunnion, said second washer between said spacer and the engine casing. 9. A variable vane assembly in accordance with claim 6 wherein said journal bushing has a thickness that is thicker than a thickness of at least one of said first washer and said second washer. 10. A variable vane assembly in accordance with claim 6 wherein said seal assembly first washer contacts said journal bushing, such that said journal bushing between said first washer and said trunnion. 11. A compressor for a gas turbine engine, said compressor comprising:a rotor comprising a rotor shaft and a plurality of rows of rotor blades;a casing surrounding said rotor blades;at least one row of variable vanes secured to said casing and extending between an adjacent pair of said plurality of rows of rotor blades, each said variable vane comprising a platform and a trunnion, said platform extending outwardly from said trunnion and comprising an outer wall defining an outer periphery of said platform, and a radially outer surface extending from said outer wall to said trunnion; anda seal assembly configured to facilitate reducing air leakage through said casing at least one opening, said seal assembly comprising a journal bushing, a first washer, and a second washer, said journal bushing comprising a first end, a second end, and a substantially cylindrical body extending between said first and second ends, a diameter of said journal bushing body is substantially constant between said bushing first and second ends, said journal bushing in contact with said trunnion and configured to prevent contact between said trunnion and said casing, said first washer substantially flat and extending radially inwardly from said platform outer wall towards a center axis of symmetry of said trunnion, said first washer configured to prevent contact between said variable vane platform radially outer surface and said casing, said second washer is substantially planar and contacts said trunnion such that said journal bushing second end and said second washer are separated by a substantially uniform gap that is defined therebetween. 12. A compressor in accordance with claim 11 wherein said first washer adjacent said journal bushing first end. 13. A compressor in accordance with claim 12 wherein said seal assembly journal bushing has a first thickness, said first washer has a second thickness, said second washer has a third thickness, said journal bushing first thickness thicker than said first washer second thickness and said second washer third thickness. 14. A compressor in accordance with claim 12 wherein said seal assembly journal bushing fabricated from a first material, said first washer fabricated second material that is different from said journal bushing first material, said second washer fabricated from a third material that is different from said journal bushing first material. 15. A compressor in accordance with claim 12 further comprising a spacer comprising a first portion and a second portion, said second portion contacting said trunnion, said second washer between said spacer first portion and said casing. 16. A compressor in accordance with claim 12 wherein said seal assembly first washer contacts said journal bushing, such that said journal bushing between said first washer and said trunnion. 17. A compressor in accordance with claim 12 wherein said seal assembly second washer contacts said trunnion.

이 특허에 인용된 특허 (10)

이 특허를 인용한 특허 피인용횟수: 14

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Methods and apparatus for sealing gas turbine engine variable vane assemblies

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Methods and apparatus for sealing gas turbine engine variable vane assemblies

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