[특허]Method for reducing steady state rotor blade tip clearance in a land-based gas turbine to improve efficiency

Method for reducing steady state rotor blade tip clearance in a land-based gas turbine to improve efficiency 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01D-005/20
출원번호	US-0565748 (1995-11-30)
발명자 / 주소	Gaul Gregory R. (Orlando FL)
출원인 / 주소	Westinghouse Electric Corporation (Pittsburgh PA 02)
인용정보	피인용 횟수 : 15 인용 특허 : 7

초록 ▼

Disclosed is a method for improving the efficiency of a land-based gas turbine by controlling the blade tip clearance. The diameter of the outer gas path casing is increased during transient periods. The outer casing is heated during transient periods to increase its diameter and the associated blad

대표청구항 ▼

A method of improving the efficiency of a gas turbine during steady state operation, said turbine having at least one blade tip and a support member disposed in relation to said blade tip to define a blade tip clearance, comprising the steps of: (a) providing a predetermined minimum blade tip clearance between the at least one blade tip and the support member, (b) controlling said blade tip clearance during a transient, non-steady state period of operation of the turbine such that the predetermined minimum blade tip clearance is substantially maintained during a steady state period of operation of said turbine. A gas turbine system comprising a gas turbine having at least one blade tip, a support member having an outside diameter disposed in relation to said blade tip to define a blade tip clearance, and means for controlling said blade tip clearance during a start-up period of operation of the turbine such that a minimum blade tip clearance is provided during a steady state operation of said turbine.

이 특허에 인용된 특허 (7)

Weiler Wolfgang (Dachau DEX) Trappmann Klaus (Dachau DEX), Arrangement for maintaining clearances between a turbine rotor and casing.
상세보기
Corsmeier Robert J. (Cincinnati OH) Tseng Wu-Yang (West Chester OH), Blade tip clearance control apparatus using shroud segment position modulation.
상세보기
Lenahan Dean T. (Cincinnati OH) Shotts L. D. (Cincinnati OH) Shetty Bandadi S. (West Chester OH) Glover Jeffrey (Cincinnati OH), Clearance control system for separately expanding or contracting individual portions of an annular shroud.
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Weiler Wolfgang (Dachau DEX), Gas turbine engine.
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Johnson David M. (Mainville OH), Gas turbine engine case thermal control flange.
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Damlis Nicholas (Cincinnati OH) Zegarski Frederick J. (Cincinnati OH) Brayton Donald D. (Maineville OH), Gas turbine engine clearance control apparatus.
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Leonard John F. (Bristol GB2) Maggs Peter J. (Bath GB2), Turbine engines.
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이 특허를 인용한 특허 (15)

John Xia, Active control system for gas turbine blade tip clearance.
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Farley, Nicholas Robert; Cloninger, II, Joel Russell; Lawler, John Fitzgerald, Apparatus and system for compressor clearance control.
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Mark Stewart Schroder, Bucket tip clearance control system.
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Kesseli, James B.; Nash, James S., Ceramic-to-metal turbine shaft attachment.
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Baldwin, Matthew Stephen, Ceramic-to-metal turbine volute attachment for a gas turbine engine.
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Vetters, Daniel Kent; Karam, Michael Abraham, Gas turbine engine tip clearance control.
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Kesseli, James B.; Baldwin, Matthew Stephen, Metallic ceramic spool for a gas turbine engine.
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Shepherd, Andrew, Rotor tip clearance.
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Jonathan J. Stow, Shroud assembly and method of machining same.
상세보기
D'Souza, Prashanth; Badami, Vivek Venugopal; Prabhu, Rahul Srinivas; Balasubramaniam, Mahalakshmi Shunmugam; Behera, Ajay Kumar; Bhattacharya, Aninda; Rajagopalan, Venkatesh, System and method for monitoring health of airfoils.
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Prowse, Kevin Joseph; Kaplan, Howard Jay, System for controlling clearance between blade tips and a surrounding casing in rotating machinery.
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Ballard, Jr., Henry G.; Wilson, Ian David; Chieco, Stephen Christopher; Kneeland, Andrew Ray; Miller, Bradley James; Black, Kenneth David; Goetze, Raymond, Systems and methods of reducing heat loss from a gas turbine during shutdown.
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Rigney, Joseph David; Walston, William Scott; Grylls, Richard John, Turbine airfoil process sequencing for optimized tip performance.
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David Leach ; Iain Robertson Kellock ; Larry Wayne Plemmons ; Cedric Chow ; Brendan Francis Sexton ; Mark Stewart Schroder, Turbine inner shell heating and cooling flow circuit.
상세보기
Brushwood John S. ; Chupp Raymond E., Turbine interstage sealing arrangement.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

연합인증

Method for reducing steady state rotor blade tip clearance in a land-based gas turbine to improve efficiency 원문보기