[특허]Face seal with double spiral grooves

Face seal with double spiral grooves 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16J-015/32
출원번호	US-0862463 (1992-04-02)
발명자 / 주소	Lai Wei-Tang (Hoffman Estates IL)
출원인 / 주소	John Crane Inc. (Morton Grove IL 02)
인용정보	피인용 횟수 : 32 인용 특허 : 0

초록 ▼

A mechanical face seal for a high speed, rotary fluid pressure device comprising rotating and stationary seal rings disposed in a housing and having confronting radial seal faces normally biased into engagement with one another. Oppositely inclined sets of spiral grooves are formed in the seal face of one ring, one set functioning to pump fluid from the reservoir downstream between the seal faces, and the other set functioning to pump fluid between the faces upstream back toward the reservoir. Each downstream pumping groove preferably intersects only one upstream pumping groove. Fluid pressure between the faces forms a gap therebetween, and the reversely inclined groove construction minimizes fluid loss or leakage.

대표청구항 ▼

A mechanical seal construction comprising a stationary housing, a shaft rotatably supported in said housing, a pair of relatively rotatable sealing rings surrounding said shaft, one of said rings being rotatable with said shaft and the other being fixed relative to said housing, said rings having confronting, generally radial faces, means normally biasing one of said rings toward other, said rings having a first set of circumferential edges adapted to be exposed to a fluid under pressure to be sealed in said housing and having other circumferential edges adapted to be exposed to a lower pressure outside of said housing, spiral groove means in the confronting face of one of said rings, said spiral groove means including a plurality of uniformly disposed downstream pumping grooves formed to communicate with the fluid to be sealed at said circumferential edge of said ring adapted to be exposed to the fluid under pressure and extending toward said other circumferential edge of said one ring, the downstream pumping grooves having an included angle at the point of intersection with a tangent of the circumferential edge of said ring which is exposed to the fluid under pressure, said downstream groove included angle being in a range of from 5°to 20°, said downstream pumping grooves being operable during rotation of said shaft to pump fluid from said circumferential edge exposed to the fluid to be sealed toward the other circumferential edge of said ring, said spiral groove means further including a plurality of uniformly disposed upstream pumping grooves intersection only a respective one of said downstream pumping spiral grooves and inclined oppositely thereto, the upstream pumping grooves having an included angle at the point of intersection with the tangent of the circumferential edge of said ring which is exposed to the relatively lower pressure in the environment outside of said housing, said upstream pumping groove included angle being in a range of from about 5°to about 20°, said upstream pumping grooves operable to pump fluid which is between said confronting ring faces back toward said circumferential edge exposed to the fluid to be sealed, said downstream pumping grooves terminating at the intersection thereof with said upstream pumping grooves.

이 특허를 인용한 특허 (32)

Flaherty Andrew L. ; Engelmann Rainer F., Aerospace housing and shaft assembly.
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Flaherty Andrew L. ; Engelmann Rainer F., Aerospace housing and shaft assembly with noncontacting seal.
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Nevadunsky, Joseph John; Enriquez, Carlos Edgar, Apparatus and methods for indicating seal leakage.
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Wang, Yuming, Bi-direction rotatable face seal with spiral grooves.
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Berdichevsky, Alexander, Bi-directional pattern for dynamic seals.
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Dickey Alan M. ; Johnson Kristy J. ; Perry David K., Controlled leakage rotating seal ring with elements for receiving and holding a lubricant on a face thereof.
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Berdichevsky, Alexander, Dynamic lay down lip seal with bidirectional pumping feature.
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Pearce David E., Face seal having strain induced face geometry.
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Sedy Josef (Mount Prospect IL), Face seal with angled grooves and shallow annular groove.
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Wang Yuming,CNX, Face seal with spiral grooves.
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Pecht Glenn G. ; Czubek John P. ; Gabriel Ralph P. ; Vasilache Anca ; Rieger Robert Peter ; Wasser James R., Gas lubricated slow speed seal.
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William E. Key ; Lionel A. Young, Hydrodynamic face seal with grooved sealing dam for zero-leakage.
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Flaherty, Andrew L., Hydrodynamic seal with circumferentially varying lift force.
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Sieghartner Leonard J., Rotary seal assembly having grooved seal facing.
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Hisada, Yoshitake; Fuchida, Takeshi, Rotating pumping apparatus with seal mechanism.
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Inoue, Hideyuki; Hosoe, Takeshi; Negishi, Yuta; Tokunaga, Yuichiro, Sliding component.
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Inoue, Hideyuki; Hosoe, Takeshi; Negishi, Yuta; Tokunaga, Yuichiro, Sliding component.
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Hosoe, Takeshi; Inoue, Hideyuki, Sliding parts.
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Tokunaga, Yuichiro; Itadani, Masatoshi; Sunagawa, Kazumasa, Sliding parts.
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Marsi Joseph A., Split mechanical face seal and method of assembly thereof.
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Yeh Oscar C. ; Hart Douglas P. ; Boyce Mary C. ; Ayala Hugo A., Textured seal for reduced wear.
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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

Face seal with double spiral grooves 원문보기

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이 특허를 인용한 특허 (32)

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Face seal with double spiral grooves 원문보기

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이 특허를 인용한 특허 (32)

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