[특허]Gas turbine engine clearance control apparatus

[미국특허] Gas turbine engine clearance control apparatus 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01D-011/08
출원번호	US-0656275 (1991-02-15)
발명자 / 주소	Damlis Nicholas (Cincinnati OH) Zegarski Frederick J. (Cincinnati OH) Brayton Donald D. (Maineville OH)
출원인 / 주소	General Electric Company (Cincinnati OH 02)
인용정보	피인용 횟수 : 56 인용 특허 : 0

초록 ▼

Apparatus for controlling the clearance between the tips of a row of rotor blades and an array of surrounding shroud segments in a gas turbine engine. A torque tube is rotatably mounted on the engine casing and has a cam positioned inside the casing. First and second members are positioned inside the casing so as to be only axially moveable and so as to have their cam-engaging surfaces axially surround the cam, and they are biased such that the cam-engaging surfaces engage the cam. A shroud hanger, to which a shroud segment may be attached, includes axially spaced apart hooked flanges positioned to be engaged by hooked flanges of the first and second members. The flanges have axially inclined slide surfaces for such engagement, and the shroud hanger is biased radially inward to engage such slide surfaces. Clearance is controlled by rotation of the torque tube which axially moves the first and second members which radially moves the shroud segment.

대표청구항 ▼

An apparatus for controlling the clearance between the tips of a row of radially outwardly extending rotor blades and an annular array of circumferentially surrounding shroud segments in a gas turbine engine having a generally axially extending engine casing, said apparatus comprising: (a) a radially extending torque tube rotatably mounted on said casing and having an axially extending cam disposed inside said casing; (b) a first member having a first cam-engaging surface and a first hooked flange; (c) a second member having a second cam-engaging surface and a second hooked flange; (d) means for disposing said members inside said casing such that said members are generally only axially moveable relative to said casing and such that said cam-engaging surfaces axially surround said cam; (e) means for biasing said members such that said cam-engaging surfaces axially engage said cam; (f) a shroud hanger having axially spaced apart third and fourth hooked flanges disposed to be engagable respectively by said first and second hooked flanges, said flanges having axially inclined slide surfaces for said engagement, and with a said shroud segment attachable to said shroud hanger; and (g) means for biasing said shroud hanger radially inward to engage said slide surfaces, wherein rotation of said torque tube axially moves said first and second members which radially moves said shroud segment; wherein said disposing means includes a support cone fixedly attached to said casing and having an axially extending circumferential rim and wherein said disposing means also includes one of said members having a circumferentially continuous ring portion with an axially extending circumferential groove slidably engaging said rim, and wherein said torque tube is also rotatably attached to said support cone and said cam is also disposed inside said support cone.

이 특허를 인용한 특허 (56) 인용/피인용 타임라인 분석

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Howell,Stephen John; Jacobson,John Carl; McCaffrey,Timothy P.; Barnes,Barry Francis, Methods and apparatus for film cooling gas turbine engine combustors.
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Scott Richard Zearbaugh ; Steven Louis Brickner ; James Warren Hackler ; Lonnie Ray Chadwell, Methods and apparatus for maintaining rotor assembly tip clearances.
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McCaffrey, Timothy P.; Howell, Stephen John; Tingle, Walter J.; Barnes, Barry Francis; Jacobson, John Carl, Methods and apparatus for operating gas turbine engine combustors.
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Howell, Stephen John; Jacobson, John Carl; McCaffrey, Timothy P.; Barnes, Barry Francis, Methods for assembling gas turbine engine combustors.
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Sexton Brendan F. ; Knuijt Hans M. ; Eldrid Sacheverel Q. ; Myers Albert ; Coneybeer Kyle E. ; Johnson David Martin ; Kellock Iain R., Removable inner turbine shell and bucket tip clearance control.
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Sexton Brendan F. ; Knuijt Hans M. ; Eldrid Sacheverel Q. ; Myers Albert ; Coneybeer Kyle E. ; Johnson David Martin ; Kellock Iain R., Removable inner turbine shell with bucket tip clearance control.
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[미국특허] Gas turbine engine clearance control apparatus 원문보기

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