[특허]Segmented labyrinth-type shaft sealing system for fluid turbines

Segmented labyrinth-type shaft sealing system for fluid turbines 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16J-015/44
출원번호	US-0370093 (1982-04-20)
발명자 / 주소	Brandon Ronald E. (1734 Lenox Rd. Schenectady NY 12308)
인용정보	피인용 횟수 : 35 인용 특허 : 0

초록 ▼

Springs are arranged in elastic fluid turbine seal ring systems to accomplish a condition of relatively large clearance while starting and during low load conditions but in cooperation with pressure forces occurring at higher loads permitting said seal ring to relocate to a position of relatively sm

대표청구항 ▼

In an elastic fluid turbine employing seals to minimize leakage between rotating and stationary components, an improvement in the seal arrangement utilizing the combination of: a segmented seal ring supported by and at least partially contained in an annular groove formed in a stationary casing to permit motion of said seal ring between a large diameter position and a small diameter position corresponding respectively to large and small clearance of said seal ring with regard to the rotating shaft, said seal ring groove being partially defined by a pair of opposing, spaced apart shoulders on said casing which form an opening of said groove extending radially into the clearance area between said casing and said rotating shaft; each segment of said seal ring including an inner arcuate portion hving seal teeth extending therefrom in the direction of and adjacent to said rotating shaft, a radially outwardly facing arcuate surface on said seal ring segment which is located opposite to a radially inward facing arcuate surface of said casing for limiting said large clearance position by contact between said opposing surfaces, an outer ring portion disposed within said seal ring groove for both axial and radial movement therein and having a pair of shoulders, extending axially in opposite directions for making radial contact respectively with said pair of spaced apart shoulders on said casing and thereby limiting said small clearance position, and a neck portion connected between said inner arcuate portion and said outer ring portion and extending between said casing shoulders, said neck portion having an axial thickness which is less than the distance between said opposing casing shoulders to thereby axially locate said seal ring segment against one of said casing shoulders and provide a contact pressure seal at the said of said neck portion which is subject to lower turbine fluid pressure; and a radial positioning means comprising a compressed spring means biased against said ring segments to forcibly cause said segments to move to said large clearance position, while working fluid which is freely admitted to the annular space between said casing and said ring segments will urge said segments toward said small clearance position, whereby at low speed and small turbine loads the spring forces will predominate, while at high flows and high working fluid pressure the pressure forces will predominate.

이 특허를 인용한 특허 (35)

Popa, Daniel Michael; Chevrette, Richard Jon; Wolfe, Christopher Edward; Kirby, III, George Horner, Apparatus and methods for supporting a retractable packing ring.
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Tesh, Stephen William; Tourigny, John Ernest, Apparatus for turbine engine cooling air management.
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Tesh, Stephen William; Tourigny, John Ernest, Apparatus for turbine engine cooling air management.
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Zhou Ming, Brush seal and rotary machine containing such brush seal.
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Dalton,William S.; Sulda,Eric; Dalton,Patrick S.; Catlow,William G., Brush seal designs for turbines and similar rotary apparatus.
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Addis Mark E. ; Dalton Willaim S., Brush-seal designs for elastic fluid turbines.
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Dalton,Wiliam S.; Sulda,Eric; Dalton,Patrick S.; Catlow,William G., Brush-seal designs for turbines and similar rotary apparatus.
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Burdgick,Steven Sebastian, Endface gap sealing for steam turbine diaphragm interstage packing seals and methods of retrofitting.
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Johnson, Jerry Wayne, Floating sealing ring.
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Lebreton Albert F. (Longwood FL), Flow dams in labyrinth seals to improve rotor stability.
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Ernst Hermann H. F., Fluid ring seal system and method.
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Bariaud Christian (Orsay FRX) Delonge Jean-Claude L. (Corbeil-Essonnes FRX), Fluidtight labyrinth seal for a turbo-machine.
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Deo, Hrishikesh Vishvas; Roy, Binayak, Method and apparatus for packing rings.
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Wang, Yu, Method and apparatus for turbine clearance flow reduction.
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Laurer, Kurt Neal; Barh, Kevin Joseph; Couture, Bernard Arthur; Mortzheim, Jason Paul, Methods and apparatus to facilitate sealing in a turbine.
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Brandon Ronald Earl ; Brandon David Earl, Non retractable segmented packing ring for fluid turbines having special springs to reduce forces during shaft rubbing.
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Morrison Bruce L. (Schenectady NY) Morson Alexander (Clifton Park NY), Positive variable clearance labyrinth seal.
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Chevrette, Richard Jon; Skinner, David Robert; Kirby, II, George Horner; Wolfe, Christopher Edward, Retractable packing ring lower half segment retaining key and method for retaining retractable packing ring lower half segment.
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Samudrala, Omprakash; Kumar, Siddarth; Crum, Gregory A.; Sha, Karimulla Shaik, Retractable seal system.
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Brandon Ronald Earl ; Brandon David Earl, Retractable segmented packing rings for fluid turbines.
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Uchida,Tatsuro; Kikuchi,Masataka, Rotary machine with seal.
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McCaffrey, Michael G., Seal anti-rotation feature.
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Turnquist Norman Arnold ; Dinc Osman Saim ; Hu Ziqiang ; Lawen ; Jr. James Louis ; Reluzco George Ernest ; Zhou Ming, Seal assembly and rotary machine containing such seal assembly.
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Paprotna, Hubertus Edward, Seal assembly for a rotary machine.
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Magoshi, Ryotaro; Konishi, Tetsu; Yoshida, Zenichi, Seal ring for steam turbine.
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Dalton William Stewart ; Clark Richard Scott ; Trunkett Kevin Scott, Spillstrip design for elastic fluid turbines and a method of strategically installing the same therein.
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Fedorovich George, Split labyrinth seal.
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Turnquist, Norman Arnold; Awtar, Shorya nmn; Gursoy, Mustafa; Varadarajan, Kartik Mangudi, Spring system designs for active and passive retractable seals.
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Lim, Chan-sun, Turbine seal assembly and turbine apparatus comprising the turbine seal assembly.
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Sanders William P. (Aurora CAX) Mitola Anthony F. (Clifton Park NY), Turbine seal with sealing strip and rubbing strip.
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Cromer Robert Harold ; Turnquist Norman Arnold ; Nielsen Stephen H. ; Chevrette Richard Jon, Uniform clearance, temperature responsive, variable packing ring.
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Feeny, Sean Douglas, Variable clearance packing ring.
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Chevrette, Richard Jon, Variable clearance packing ring arrangement.
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Chevrette Richard Jon ; Skinner David Robert ; Knorowski Victor John, Variable clearance packing ring with clips for preventing circumferential displacement.
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Skinner David Robert ; Knorowski Victor John ; O'Connor Martin Francis ; Chevrette Richard Jon ; Swart Thomas William, Variable clearance packing ring with guide for preventing circumferential displacement.
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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

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연합인증

Segmented labyrinth-type shaft sealing system for fluid turbines 원문보기

초록 ▼

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이 특허를 인용한 특허 (35)

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Segmented labyrinth-type shaft sealing system for fluid turbines 원문보기

초록 ▼

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연구과제 타임라인

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이 특허를 인용한 특허 (35)

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