Multistage compressor with improved map width performance
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04D-029/42
F04D-017/02
F04D-029/68
F04D-027/02
F04D-019/00
출원번호
US-0788064
(2013-03-07)
등록번호
US-8845268
(2014-09-30)
우선권정보
GB-0718846.9 (2007-09-27)
발명자
/ 주소
Nikpour, Bahram
출원인 / 주소
Cummins Turbo Technologies Limited
대리인 / 주소
Krieg DeVault LLP
인용정보
피인용 횟수 :
0인용 특허 :
11
초록▼
A compressor typically for use in a turbocharger comprises a downstream radial compressor impeller wheel, an upstream axial compressor impeller wheel and an intermediate stator. The compressor housing has an inlet with inner and outer walls that define between them an MWE gas flow passage. An upstre
A compressor typically for use in a turbocharger comprises a downstream radial compressor impeller wheel, an upstream axial compressor impeller wheel and an intermediate stator. The compressor housing has an inlet with inner and outer walls that define between them an MWE gas flow passage. An upstream opening defined by the flow passage provides communication between the passage and the intake and at least one first slot downstream of the upstream opening provides communication between the passage and the inner surface of the inner wall. The stator comprises a plurality of fixed vanes and is disposed in the inner wall of the inlet between the radial and axial impeller wheels. The position of the slot can be at one of several positions along the gas flow passage, in other embodiments there are second and third slots and the flow passage is divided into two parts. All the arrangements are designed to improve the compressor map width.
대표청구항▼
1. A compressor comprising: a housing defining a gas inlet and a gas outlet;a radial impeller wheel having a plurality of vanes and mounted in the housing between said inlet and outlet, the wheel being rotatable about an axis;the inlet comprising a substantially tubular outer wall extending away fro
1. A compressor comprising: a housing defining a gas inlet and a gas outlet;a radial impeller wheel having a plurality of vanes and mounted in the housing between said inlet and outlet, the wheel being rotatable about an axis;the inlet comprising a substantially tubular outer wall extending away from the impeller wheel in an upstream direction and forming a gas intake, and a substantially tubular inner wall extending away from the impeller wheel in an upstream direction and within the outer wall, the inner wall defining an inner surface at least a portion of which is located in close proximity to radially outer edges of the vanes of the radial impeller which sweep across said surface as the radial impeller wheel rotates about its axis;a substantially tubular gas flow passage defined between the inner and outer walls and extending from an upstream end to a downstream end proximate to the radial impeller wheel;an upstream opening defined by the flow passage providing communication between said passage and said intake;at least one first aperture downstream of the upstream opening and providing communication between the passage and the inner surface of the inner wall;an axial impeller wheel having a plurality of vanes and supported for rotation in said inlet upstream of the radial impeller wheel; anda stator comprising a plurality of fixed vanes and disposed in the inner wall of the inlet between the radial and axial impeller wheels, wherein the gas flow passage extends over both the axial impeller wheel and the stator. 2. A compressor according to claim 1 wherein the upstream end of the gas flow passage is upstream of the axial impeller wheel. 3. A compressor according to claim 1 wherein the upstream opening of the gas flow passage is upstream of the axial impeller wheel. 4. A compressor according to claim 1, wherein the axial impeller wheel is rotatable about the same axis as the radial impeller wheel. 5. A compressor according to claim 4, wherein the axial and radial impeller wheels are connected to a common rotational shaft for rotation about said axis. 6. A compressor according to claim 1, wherein the axial impeller wheel is disposed for rotation within the inner wall of the inlet. 7. A compressor according to claim 1, wherein the at least one first aperture is provided in the inner wall of the inlet. 8. A compressor according to claim 1, wherein the at least one first aperture is a slot. 9. A compressor according to claim 8, wherein said slot is discontinuous. 10. A compressor according to claim 8, wherein said slot is substantially annular. 11. A compressor according to claim 1, wherein said inner and outer walls and the flow passage are substantially annular. 12. A compressor according to claim 1, wherein the at least one first aperture is located over the vanes of the radial impeller wheel. 13. A compressor according to claim 12, wherein the vanes of the radial impeller wheel each comprise a radially outer edge, the at least one first aperture being adjacent to a radially outer edge. 14. A compressor according to claim 1, wherein the at least one first aperture is located over the vanes of the stator. 15. A compressor according to claim 14, wherein the vanes of the stator each comprise a radially outer edge, a leading edge and a trailing edge, the at least one first aperture being disposed over said radially outer edge. 16. A compressor according to claim 1, wherein the at least one first aperture is located over the vanes of the axial impeller wheel. 17. A compressor according to claim 16, wherein the vanes of the axial impeller wheel each comprise a radially outer edge, a leading edge and a trailing edge, the at least one first aperture being disposed over said radially outer edge. 18. A turbocharger comprising a compressor according to claim 1 and a turbine that drives said axial and radial impeller wheels in rotation. 19. An internal combustion engine fitted with a turbocharger according to claim 18. 20. A compressor comprising: a housing defining a gas inlet and a gas outlet; a radial impeller wheel having a plurality of vanes and mounted in the housing between said inlet and outlet, the wheel being rotatable about an axis;the inlet comprising a substantially tubular outer wall extending away from the impeller wheel in an upstream direction and forming a gas intake, and a substantially, tubular inner wall extending away from the impeller wheel in an upstream direction and within the outer wall, the inner wall defining an inner surface at least a portion of which is located in close proximity to radially outer edges of the vanes of the radial impeller which sweep across said surface as the radial impeller wheel rotates about its axis;a substantially tubular gas flow passage defined between the inner and outer walls and extending from an upstream end to a downstream end proximate to the radial impeller wheel;an upstream opening defined by the flow passage providing communication between said passage and said intake;at least one first aperture downstream of the upstream opening and providing communication between the passage and the inner surface of the inner wall;an axial impeller wheel having a plurality of vanes and supported for rotation in said inlet upstream of the radial impeller wheel; anda stator comprising a plurality of fixed vanes and disposed in the inner wall of the inlet between the radial and axial impeller wheels;wherein the gas flow passage extends over both the axial impeller wheel and the stator; and wherein the at least one first aperture is located over the vanes of the radial impeller wheel; andwherein there is provided at least one second aperture and at least one third aperture in said inner wall at locations axially spaced from the at least one first aperture, said second aperture being disposed over the vanes of the stator and the third aperture being disposed over the vanes of the axial impeller wheel. 21. A compressor according to claim 20, wherein the vanes of the stator each comprise a radially outer edge, a leading edge and a trailing edge, the at least one second aperture being disposed over said radially outer edge. 22. A compressor according to claim 20, wherein the vanes of the axial impeller wheel each comprise a radially outer edge, a leading edge and a trailing edge, the at least one third aperture being disposed over said radially outer edge. 23. A compressor according to claim 20, wherein there is provided a dividing wall in said gas flow passage, dividing the passage into two portions. 24. A compressor according to claim 23, wherein the dividing wall is disposed between the at least one first aperture and the at least one third aperture. 25. A compressor according to claim 24, wherein the dividing wall is movable in an axial direction in the gas flow passage.
Sumser, Siegfried; Fledersbacher, Peter; Wirbeleit, Friedrich; Willand, Juergen; Lehmann, Hans-Georg, Exhaust gas turbocharger for an internal combustion engine and a corresponding method.
Peter Fledersbacher DE; Siegfried Sumser DE; Juergen Willand DE; Friedrich Wirbeleit DE, Internal combustion engine with an exhaust gas turbocharger, and associated method.
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