[특허]Shroud segment and assembly with surface recessed seal bridging adjacent members

[미국특허] Shroud segment and assembly with surface recessed seal bridging adjacent members 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01D-011/08
출원번호	US-0325779 (2002-12-20)
발명자 / 주소	Alford, Mary Ellen Darkins, Toby George Noe, Mark Eugene
출원인 / 주소	General Electric Company
인용정보	피인용 횟수 : 24 인용 특허 : 19

초록 ▼

A turbine engine shroud segment is provided with a radially outer surface including a pair of spaced apart, opposed first and second edge portion surface depressions, for example spaced circumferentially, having a seal surface shaped to receive, in a surface depression formed between assembled adjacent segments in a shroud assembly, or axially assembled adjacent segments and engine members, a radially outer fluid seal member. The depression portions of a shroud segment are joined with the radially outer surface of the shroud segment through an arcuate transition surface. Stresses generated during engine operation in the shroud material are reduced, enabling practical use of a low ductility material, for example a ceramic matrix composite. The edge portion surface depressions are provided with a first shape and the fluid seal member, disposed at the depression, is provided with a surface of a second shape matched in shape with the first shape.

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1. A turbine engine shroud segment comprising a shroud segment body having a radially outer surface extending at least between a pair of first and second spaced apart, opposed outer surface end portions, wherein at least one of the first and second outer edge portions of the radially outer surface in the pair includes a surface depression portion including a depression portion seal surface of a first shape along the depression portion, the depression portion seal surface joined with the shroud body radially outer surface through an arcuate transition surface in which:the pair of first and second outer surface end portions are spaced apart axially; and, the depression portion seal surface of the depression portion extends circumferentially along the depression portions. 2. The shroud segment of claim 1 in which the shroud segment includes a second pair of first and second outer surface end portions spaced apart circumferentially, with depression portion seal surfaces of the second pair extending axially.3. The shroud segment of claim 1 in which the first shape of the depression portion seal surface is flat.4. The shroud segment of claim 1 in which the shroud segment is made of a low ductility material having a tensile ductility measured at room temperature to be no greater than about 1%.5. The shroud segment of claim 4 in which the low ductility material is a ceramic matrix composite material.6. A turbine engine shroud assembly comprising a plurality of circumferentially disposed shroud segments, wherein:each shroud segment comprises a shroud segment body made of a ceramic matrix composite material having a tensile ductility measured at room temperature to be no greater than about 1%, the shroud segment body having a radially outer surface extending at least between a pair of first and second spaced apart, opposed outer surface end portions, at least one of the first and second outer edge portions of the radially outer surface in the pair having a surface depression portion including a depression portion seal surface of a first shape along the depression portion, the depression portion seal surface joined with the shroud body radially outer surface through an arcuate transition surface, with the first and second outer edge portions of a shroud segment being distinct from a surface of a juxtaposed adjacent second member by a separation therebetween; and, a fluid seal member is retained in the surface depression portion and bridges the separation; the fluid seal member including a fluid seal member surface of a second shape matched in shape with the first shape of the depression portion seal surface and in juxtaposition for contact with the depression portion seal surface along the separation; the turbine engine shroud assembly including a seal retainer carried by a shroud hanger separate from and unsecured with the ceramic matrix composite material of the shroud segment body, the seal retainer applying a force to the fluid seal member toward the shroud segment to retain the fluid seal member in the surface depression portion. 7. The shroud assembly of claim 6 in which the fluid seal member is sufficiently flexible to enable contact with the depression portion seal surface.8. The shroud assembly of claim 6 in which:the pair of first and second outer surface edge portions are spaced apart circumferentially; the shroud segments are disposed circumferentially with the depression portions of circumferentially adjacent first and second outer edge portions defining therebetween an axially extending surface depression including a depression seal surface of the first shape and an axially extending separation; and, the fluid seal member is disposed axially along the separation. 9. The shroud assembly of claim 6 in which both the first shape of the depression portion seal surface and the second shape of the fluid member seal surface is flat.10. The shroud assembly of claim 6 in which the seal retainer carried by the shroud hanger is a stepped pin.11. The shroud assembly of claim 10 in which the stepped pin comprises an enlarged head including a slot sized and shaped to receive and apply force to the fluid seal member.

이 특허에 인용된 특허 (19) 인용/피인용 타임라인 분석

Draskovich Barry S., Ceramic airfoil.
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Widrig, Scott M.; Morrison, Jay; Albrecht, Harry A.; Shteyman, Yevgeniy; Butner, Steven C., Ceramic matrix composite turbine vane.
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Carrier Gilles (Ville Lemoyne CAX) Stoten Michael D. (Oakville CAX) Szwedska Patrick (Mississauga CAX), Ceramic stator vane assembly.
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Darkins ; Jr. Toby G. ; Shelton Monty L. ; Doughty Roger L. ; Noe Mark E., Ceramic turbine airfoils with cooled trailing edge blocks.
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Booher ; Jr. Claude R. (West Chester PA) Rahaim Thomas J. (Claymont DE), Ceramic-to-metal (or ceramic) cushion/seal for use with three piece ceramic stationary vane assembly.
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Maier Horst R. (Selb DEX) Krauth Axel (Selb DEX) Pohlmann Hans-Juergen (Selb DEX) Nink Horst (Selb DEX) Brobeck Helmut (Hessheim DEX) Cropp Ingo (Frankenthal DEX) Bergmeier Dieter (Heidelberg DEX), Element and method for connecting ceramic and metallic parts.
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Landis ; Jr. Delmer H. (Loveland OH) Thomas ; Jr. Theodore T. (Loveland OH) Haap Charles J. (Cincinnati OH), Floating seal for a variable area turbine nozzle.
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Hayton Paul R. (Watford GB2), Gas turbine engines.
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Matyscak Kamil (Brenden DEX), Guide wave suspension for an axial-flow turbomachine.
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Lee Ching-Pang, Internally grooved turbine wall.
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Proctor Robert (West Chester OH) Linger David R. (Cincinnati OH) Di Salle David A. (West Chester OH) Brassfield Steven R. (Cincinnati OH) Plemmons Larry W. (Fairfield OH), Isolated turbine shroud.
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Predmore, Daniel Ross, Overlapping interference seal and methods for forming the seal.
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Nichols Herbert E. (Cincinnati OH), Rotor blade shroud segment.
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Hagle Michael P. (Mason OH), Seal assembly for segmented turbine engine structures.
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Edward Isaac Cohen, Split face mechanical seal system.
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Noe, Mark Eugene; Darkins, Jr., Toby George; Doughty, Roger Lee, Tangential flow baffle.
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Bagepalli Bharat Sampathkumaran ; Corman Gregory Scot ; Dean Anthony John ; DiMascio Paul Stephen ; Mirdamadi Massoud, Turbine assembly containing an inner shroud.
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Wygle Thomas G. (Loveland OH) Fargher David G. W. (Fairfield OH) Piekarski Arthur J. (Middletown OH), Turbine rotor disk post cooling system.
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Walker Alan (Wyoming OH) Wakeman Thomas G. (Lawrenceburg IN) Lenahan Dean T. (Cincinnati OH) Plemmons Larry W. (Fairfield OH) Elovic Andrew P. (Rishon Lezion ILX), Turbine shroud clearance control assembly.
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이 특허를 인용한 특허 (24) 인용/피인용 타임라인 분석

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McCaffrey, Michael G.; Hudson, Eric A., Blade clearance control using high-CTE and low-CTE ring members.
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Jarmon, David C.; Smith, Peter G., Ceramic matrix composite combustor vane ring assembly.
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Merrill, Gary B.; Morrison, Jay A., Compressible ceramic seal.
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Jarmon, David C.; Butler, Shaoluo L., Gas turbine engine joint having a metallic member, a CMC member, and a ceramic key.
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Tholen, Susan M.; Lutjen, Paul M., Gas turbine engines and related systems involving blade outer air seals.
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Morrison, Jay A., Grid ceramic matrix composite structure for gas turbine shroud ring segment.
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Shapiro, Jason David, Method and system for a ceramic matrix composite shroud hanger assembly.
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Roberts, III, Herbert Chidsey; Bruce, Kevin Leon; Blow, Gerald Kent; Cairo, Ronald Ralph, Methods and apparatus for assembling turbine engines.
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Shapiro, Jason David; Desander, Donald Brett; Vickers, Edward Charles, Methods and assemblies for attaching airfoils within a flow path.
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Franks, Michael John; Shapiro, Jason David; Rulli, Samuel Ross; Doughty, Roger Lee, Mounting apparatus for low-ductility turbine shroud.
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Dev, Bodhayan; Meyer, Robert Carl; Sarawate, Neelesh Nandkumar; Albert, Jason Edward; Itzel, Gary Michael, Seal assembly to seal corner leaks in gas turbine.
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Martin, Yves; Di Paola, Franco, Sealing and cooling at the joint between shroud segments.
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Budnick, Matthew; Chuong, Conway; Scott, Jonathan A., Seals for a circumferential stop ring in a turbine exhaust case.
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Sippel, Aaron D.; Freeman, Ted J.; Thomas, David J.; Lamusga, Joseph P.; Shoemaker, Brian J.; Hillier, Steven, Split line flow path seals.
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Kirtley, Kevin Richard; Morgan, Victor John, Tapered gas turbine segment seals.
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McCaffrey, Michael G., Turbine rotor non-metallic blade attachment.
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Durocher,Eric; Clermont,Martin, Turbine shroud segment feather seal located in radial shroud legs.
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[미국특허] Shroud segment and assembly with surface recessed seal bridging adjacent members 원문보기

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이 특허에 인용된 특허 (19) 인용/피인용 타임라인 분석

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