IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0571686
(2009-10-01)
|
등록번호 |
US-8490409
(2013-07-23)
|
발명자
/ 주소 |
- Pucovsky, Tania
- Aitchison, Paul
- Healey, Brian
|
출원인 / 주소 |
- Pratt & Whitney Canada Corp.
|
대리인 / 주소 |
Norton Rose Fulbright Canada LLP
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
9 |
초록
▼
A fluid-conveying device including an inner tubular member with a circumferential end portion, a non-elastomeric ring received in a depression of the end portion, and an outer tubular member. The ring has a peripheral surface with a rounded contour defined along a longitudinal direction configured t
A fluid-conveying device including an inner tubular member with a circumferential end portion, a non-elastomeric ring received in a depression of the end portion, and an outer tubular member. The ring has a peripheral surface with a rounded contour defined along a longitudinal direction configured to remain out of the depression to engage the outer tubular member and facilitate sealing thereof.
대표청구항
▼
1. A bleed air system for directing bleed air from a compressor section of a gas turbine engine, the bleed air system comprising: a cylindrical adaptor in fluid communication with the compressor section, the adaptor having an inner surface;a cylindrical conduit defined by an outer cylindrical wall h
1. A bleed air system for directing bleed air from a compressor section of a gas turbine engine, the bleed air system comprising: a cylindrical adaptor in fluid communication with the compressor section, the adaptor having an inner surface;a cylindrical conduit defined by an outer cylindrical wall having two opposed open ends for permitting fluid passage therethrough, the outer cylindrical wall having a pair of adjacent annular flanges extending radially outwardly in proximity of a respective one of the open ends, the pair of annular flanges defining a circumferential groove between opposed annular side walls thereof and being circumscribed by the cylindrical adaptor; anda non-elastomeric ring received in the circumferential groove, the ring having two opposed annular walls located adjacent a respective one of the two side walls of the flanges, the ring having a radial thickness greater than a depth of the groove such that an outer peripheral portion of the ring protrudes radially from the groove around an entire circumference thereof, the outer peripheral portion having an outer peripheral surface abutting the inner surface of the adaptor and maintaining the adaptor spaced apart from the conduit in proximity of the ring while sealing the conduit within the adaptor, the outer peripheral surface having a curved profile extending between the opposed annular walls along a longitudinal direction configured to provide continuous abutment of the outer peripheral surface on the inner surface irrespective of angular displacement of the cylindrical adaptor relative to the cylindrical conduit, the ring being spaced apart from an inner circumferential surface defining a bottom of the groove along at least a portion of the circumference of the groove such as to create a radial gap permitting relative movement between the ring and the cylindrical conduit. 2. The bleed air system as defined in claim 1, wherein the ring has a circumferential gap extending along part of a circumference thereof, the circumferential gap allowing radial compression of the ring. 3. The bleed air system as defined in claim 1, wherein the circumferential surface of the groove has holes defined therein in fluid communication with a source of pressurized air to pressurize the gap. 4. The bleed air system as defined in claim 1, wherein the curved profile includes two curves with different radiuses of curvature positioned side by side along the longitudinal direction between the opposed annular walls. 5. The bleed air system as defined in claim 1, wherein the ring is made of a nickel alloy. 6. The bleed air system as defined in claim 1, wherein the outer peripheral surface of the ring includes a layer of anti-galling compound. 7. The bleed air system as defined in claim 1, wherein the curved profile of the ring defines a radius of curvature, and a ratio between the radius of curvature and an outer diameter of the ring is within the range of 0.2 to 0.8. 8. The bleed air system as defined in claim 1, wherein the ring is monolithic. 9. A fluid-conveying device comprising: an inner tubular member having two opposed open ends, at least one circumferential portion of the inner tubular member adjacent one of the open ends having an outer annular surface and an annular depression defined therein by two opposed annular side walls extending radially inwardly from the outer surface and interconnected by a circumferential surface spaced radially inwardly from the outer annular surface;a non-elastomeric ring occupying an annular portion of the depression, the ring having an inner diameter greater than a first outer diameter defined by the circumferential surface and smaller than a second outer diameter defined by the outer annular surface near the depression such as to enable radial displacement of the ring within the annular depression while maintaining an inner annular portion of the ring inside the depression, the ring having opposed annular ring walls located adjacent a respective one of the side walls defining the depression and an outer peripheral surface with a rounded contour extending between the annular ring walls along a longitudinal direction, the ring defining an outer diameter greater than the second outer diameter; andan outer tubular member having an inner surface abutting the outer peripheral surface of the ring, the outer tubular member having an inner diameter at least substantially equal to the outer diameter of the ring and being sealingly engaged thereto, the ring maintaining the outer tubular member distanced from the inner tubular member, the outer tubular member having a radially outwardly extending flange on an open end thereof which receives the inner tubular member therein. 10. The fluid-conveying device as defined in claim 9, wherein the circumferential portion comprises two spaced-apart flanges extending radially outwardly from the circumferential surface, each flange defining one of the annular side walls. 11. The fluid-conveying device as defined in claim 9, wherein the ring wherein the ring has a circumferential gap extending along part of a circumference thereof, the circumferential gap allowing radial compression of the ring. 12. The fluid-conveying device as defined in claim 9, wherein the ring is made of a material resistant to temperatures of at least 1000° F. 13. The fluid-conveying device as defined in claim 9, wherein the rounded contour defines a radius of curvature, and a ratio between the radius of curvature and the outer diameter of the ring is within the range of 0.2 to 0.8. 14. The fluid-conveying device as defined in claim 9, wherein the ring is monolithic. 15. A bleed air transfer tube assembly for a compressor of a gas turbine engine, the tube assembly comprising: an inner tubular member having opposed open ends and at least one annular groove defined in an outer surface thereof in proximity of a respective one of the open ends;an outer tubular member surrounding at least a portion of the inner tubular member where the groove is defined, the outer and inner tubular members being relatively sized such as to allow a range of relative angular displacement therebetween;one of the inner and outer tubular members is in fluid communication with the compressor; anda non-elastomeric ring received within the annular groove and having opposed radial surfaces extending adjacent radial walls of the annular groove, an outer surface defining a curve along a longitudinal direction between the opposed radial surfaces and in sealed contact with an inner wall of the outer tubular member, and an inner surface extending within the groove, the inner surface of the ring being spaced apart from a bottom of the groove around at least part of its circumference throughout the range of relative angular displacement, the ring having a radial thickness larger than a radial depth of the groove, such that the outer surface of the ring is in continuous contact with the inner wall of the outer tubular member and prevents contact between the inner and outer tubular members in proximity of the groove throughout the range of relative angular displacement. 16. The bleed air transfer tube assembly as defined in claim 15, wherein the inner tubular member comprises two adjacent spaced-apart flanges extending radially outwardly from a remainder of the inner tubular member and defining the groove therebetween. 17. The bleed transfer tube as defined in claim 15, wherein the ring is made of a material resistant to temperatures of at least 1000° F. 18. The bleed transfer tube as defined in claim 15, wherein the curve of the outer surface defines a radius of curvature, and a ratio between the radius of curvature and an outer diameter of the ring is within the range of 0.2 to 0.8. 19. The bleed transfer tube as defined in claim 15, wherein the ring is monolithic. 20. The bleed transfer tube as defined in claim 15, wherein the ring has a circumferential gap extending along part of a circumference thereof, thecircumferential gap allowing radial compression of the ring.
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