A compressor for compressing a gas, the compressor comprising: a housing having an axial inlet and an annular outlet volute; an impeller wheel including a plurality of blades, the wheel being rotatably mounted within the housing between the inlet and outlet volute; the axial inlet being defined by a
A compressor for compressing a gas, the compressor comprising: a housing having an axial inlet and an annular outlet volute; an impeller wheel including a plurality of blades, the wheel being rotatably mounted within the housing between the inlet and outlet volute; the axial inlet being defined by a tubular inducer portion of the housing and the annular outlet volute being defined by an annular diffuser passage surrounding the impeller, the diffuser having an annular outlet communicating with the outlet volute; the housing having an inner wall defining a surface located in close proximity to radially outer edges of the impeller blades which sweep across the surface as the impeller wheel rotates; wherein the compressor housing incorporates at least one section comprised of a deformable, energy absorbing material arranged to deform and absorb energy generated as a result of impeller wheel failure. A turbine incorporating similar deformable, energy absorbing materials is also described, as are turbochargers incorporating such a compressor and/or turbine.
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1. A compressor for compressing a gas, the compressor comprising: a housing having an axial inlet and an annular outlet volute;an impeller wheel including a plurality of blades, the wheel being rotatably mounted within the housing between said inlet and outlet volute;the axial inlet being defined by
1. A compressor for compressing a gas, the compressor comprising: a housing having an axial inlet and an annular outlet volute;an impeller wheel including a plurality of blades, the wheel being rotatably mounted within the housing between said inlet and outlet volute;the axial inlet being defined by a tubular inducer portion of the housing and the annular outlet volute being defined by an annular diffuser passage surrounding the impeller, the diffuser having an annular outlet communicating with the outlet volute;the housing having an inner wall defining a surface located in close proximity to radially outer edges of the impeller blades which sweep across said surface as the impeller wheel rotates;the compressor housing incorporating at least one section comprised of a deformable, energy absorbing material arranged to deform and absorb energy generated as a result of impeller wheel failure,wherein said deformable energy absorbing material comprises a cellular material. 2. A compressor according to claim 1, wherein the deformable, energy absorbing material forms at least part of the inner wall of the compressor housing which defines the surface across which the impeller blades sweep as the impeller wheel rotates. 3. A compressor according to claim 1, wherein the deformable, energy absorbing material is embedded within said inner wall of the compressor housing at a location adjacent to said surface. 4. A compressor according to claim 1, wherein the deformable, energy absorbing material is embedded within said inner wall at a location spaced axially and/or radially outboard of said surface. 5. A compressor according to claim 1, wherein the deformable, energy absorbing material forms at least part of the surface across which the impeller blades sweep as the impeller wheel rotates. 6. A compressor according to claim 1, wherein the deformable, energy absorbing material forms substantially all of said surface. 7. A compressor according to claim 1, wherein the deformable, energy absorbing material is comprised in a region of the compressor housing adjacent to the inner wall which defines the surface across which the impeller blades sweep as the impeller wheel rotates. 8. A compressor according to claim 1, wherein the deformable, energy absorbing material forms at least part of the axial inlet and/or annular outlet volute of the compressor housing. 9. A compressor according to claim 1, wherein the deformable, energy absorbing material forms at least part of the tubular inducer portion of the compressor housing. 10. A compressor according to claim 1, wherein said deformable, energy absorbing material comprises an open or closed pore material. 11. A compressor according to claim 1, wherein said deformable, energy absorbing material comprises a metal foam or metal mesh. 12. A compressor according to claim 1, wherein said deformable, energy absorbing material is a metal foam having a density of up to around 50% of the density of a corresponding solid material. 13. A compressor according to claim 1, wherein said deformable, energy absorbing material is a metal foam having a density of around 5 to 25% of the density of a corresponding solid material. 14. A compressor according to claim 1, wherein said deformable, energy absorbing material comprises at least one metal or at least one alloy of said metal selected from the group consisting of aluminium, titanium, magnesium, iron, steel, nickel and copper. 15. A compressor according to claim 1, wherein said deformable, energy absorbing material comprises one of: a composite of two or more metals, a composite of two or more metal alloys, and a composite of at least one metal and at least one metal alloy. 16. A compressor according to claim 15, wherein said composite comprises steel reinforced aluminium. 17. A compressor according to claim 1, wherein said deformable, energy absorbing material incorporates one or more polymeric and/or ceramic materials. 18. A turbocharger comprising a compressor according to claim 1. 19. A turbocharger comprising: a turbocharger shaft rotatable about an axis;a turbine comprising a turbine wheel provided at one end of the shaft for rotation about said axis within a turbine housing;a compressor comprising an impeller wheel mounted to the other end of the shaft for rotation about said axis within a compressor housing;the shaft being rotatable on at least one bearing assembly housed within a bearing housing located between the compressor housing and the turbine housing;the compressor housing having at least one section comprised of a deformable, energy absorbing material arranged to deform and absorb energy generated as a result of the failure of the impeller wheel,wherein said deformable, energy absorbing material comprises a cellular material. 20. A turbocharger according to claim 19, wherein the compressor comprising: the compressor housing having an axial inlet and an annular outlet volute;the impeller wheel including a plurality of blades, the impeller wheel being rotatably mounted within the compressor housing between said inlet and outlet volute;the axial inlet being defined by a tubular inducer portion of the compressor housing and the annular outlet volute being defined by an annular diffuser passage surrounding the impeller wheel, the diffuser having an annular outlet communicating with the outlet volute;the compressor housing having an inner wall defining a surface located in close proximity to radially outer edges of the impeller blades which sweep across said surfaces as the impeller wheel rotates.
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이 특허에 인용된 특허 (7)
Adeff George A. ; Marr Christopher S., Die cast compressor housing for centrifugal compressors with a true volute shape.
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