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;
wherein the guide comprises one or more elongate members; and
wherein the elongate members are located at an outer radially extent of the inlet portions if the sleeve has an inner diameter that is greater than an outer diameter of inlet portions.
1 Assignment
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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
9 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;
wherein the guide comprises one or more elongate members; and
wherein the elongate members are located at an outer radially extent of the inlet portions if the sleeve has an inner diameter that is greater than an outer diameter of inlet portions. - View Dependent Claims (2)
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3. 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; one or more vanes located in one or both inlet portions, the one or more vanes dividing an inlet portion into at least two inlet passages, and wherein the guide comprises; one or more edges of the one or more vanes. - View Dependent Claims (4, 5)
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6. 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;
wherein at least a part of the actuator comprises the helical interface, and the sleeve is arranged to move axially, and/or helically. - View Dependent Claims (7, 8, 9)
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Specification