TURBOMACHINE
First Claim
1. A variable geometry turbine comprising:
- a turbine wheel mounted for rotation about a turbine axis within a housing, the housing defining an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls, the annular inlet being divided into at least two axially offset inlet portions;
a cylindrical sleeve axially movable across the annular inlet to vary the size of a gas flow path through the inlet; and
a guide for guiding the movement of the cylindrical sleeve, the guide being at least partially located within the inlet at a radially extent of the inlet portions, and extending in an axial direction parallel to the turbine axis.
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Accused Products
Abstract
According to a first aspect of the present invention there is provided a variable geometry turbine comprising: a turbine wheel mounted for rotation about a turbine axis within a housing, the housing defining an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls, the annular inlet being divided into at least two axially offset inlet portions; a cylindrical sleeve axially movable across the annular inlet to vary the size of a gas flow path through the inlet; and a guide for guiding the movement of the cylindrical sleeve, the guide being at least partially located within the inlet at a radially extent of the inlet portions, and extending in an axial direction parallel to the turbine axis.
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Citations
20 Claims
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1. A variable geometry turbine comprising:
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a turbine wheel mounted for rotation about a turbine axis within a housing, the housing defining an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls, the annular inlet being divided into at least two axially offset inlet portions; a cylindrical sleeve axially movable across the annular inlet to vary the size of a gas flow path through the inlet; and a guide for guiding the movement of the cylindrical sleeve, the guide being at least partially located within the inlet at a radially extent of the inlet portions, and extending in an axial direction parallel to the turbine axis. - View Dependent Claims (2, 3)
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4. A variable geometry turbine comprising:
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a turbine wheel mounted for rotation about a turbine axis within a housing; the housing defining an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls, the annular inlet being divided into at least two axially offset inlet portions by a baffle, an inlet portion being divided into at least two inlet passages by a vane; and a cylindrical sleeve axially movable across the annular inlet to vary the size of a gas flow path through the inlet; wherein one or more of;
a portion of an extremity of the baffle, a portion of an extremity of the vane and/or a leading end of the sleeve is provided with an inclined surface for facilitating movement of the sleeve across the baffle and/or vane. - View Dependent Claims (5, 6, 7, 8, 9)
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10. A variable geometry turbine comprising:
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a turbine wheel mounted for rotation about a turbine axis within a housing, the housing defining an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls, the annular inlet being divided into at least two axially offset inlet portions; a cylindrical sleeve structure axially movable across the annular inlet to vary the size of a gas flow path through the inlet; and wherein the cylindrical sleeve structure extends across the entire width of the inlet, such that a first end of the sleeve structure is supported within or by the first inlet side wall, or a body defining that wall, and a second opposite end of the sleeve structure is supported within or by the second sidewall, or a body defining that wall; and wherein the sleeve structure comprises one or more apertures locatable within the inlet to, upon movement of the sleeve structure, vary the size of a gas flow path through the inlet. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A variable geometry turbine comprising:
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a turbine wheel mounted for rotation about a turbine axis within a housing, the housing defining an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls, the annular inlet being divided into at least two axially offset inlet portions; a sleeve assembly, comprising a sleeve that is movable in a direction parallel to the turbine axis and across the annular inlet to vary the size of a gas flow path through the inlet, and an actuator for affecting movement of the sleeve; wherein a helical interface is present in the sleeve assembly, the helical interface being arranged to induce, in use, helical movement of a part of the sleeve assembly. - View Dependent Claims (18, 19, 20)
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Specification