Variable geometry turbine
First Claim
1. A variable geometry turbine comprising:
- a turbine wheel supported in a housing for rotation about a turbine axis;
an annular inlet passage defined between respective radial inlet surfaces of first and second wall members, at least one of said first and second wall members being moveable along the turbine axis to vary the size of the inlet passage;
an array of vanes extending across the inlet passage, said vanes being connected to said first wall member;
a complementary array of vane slots defined by the second wall member, said vane slots being configured to receive said vanes to accommodate relative movement between the first and second wall members;
wherein the second wall member comprises at least two axially adjacent co-axial plates, a first of said plates defining a first array of openings which overlie a second array of openings defined by a second of said plates so as to define said array of vane slots, said first plate being fixed to said second plate; and
wherein the second wall member comprises at least a third co-axial plate that is axially adjacent to said second plate, said third plate defining a third array of openings which overlie the second array of openings defined by the second plate so as to further define said array of vane slots.
1 Assignment
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Accused Products
Abstract
A variable geometry turbine comprises: a turbine wheel (5) in a housing (1) for rotation about a turbine axis, an annular inlet passage (9) defined between respective radial inlet surfaces of first and second wall members (11, 12), at least one of said first and second wall members being moveable along the turbine axis to vary the size of the inlet passage; an array of vanes (14) extending across the inlet passage, said vanes being connected to said first wall member; a complementary array of vane slots (28) defined by the second wall member, said vane slots configured to receive said vanes to accommodate relative movement between the first and second wall members; the second wall member comprising at least two axially adjacent co-axial plates (29, 30), a first plate (29) defining a first array of openings which overlie a second array of openings defined by a second plate (30) so as to define said array of vane slots, said first plate being fixed to said second plate.
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Citations
20 Claims
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1. A variable geometry turbine comprising:
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a turbine wheel supported in a housing for rotation about a turbine axis; an annular inlet passage defined between respective radial inlet surfaces of first and second wall members, at least one of said first and second wall members being moveable along the turbine axis to vary the size of the inlet passage; an array of vanes extending across the inlet passage, said vanes being connected to said first wall member; a complementary array of vane slots defined by the second wall member, said vane slots being configured to receive said vanes to accommodate relative movement between the first and second wall members; wherein the second wall member comprises at least two axially adjacent co-axial plates, a first of said plates defining a first array of openings which overlie a second array of openings defined by a second of said plates so as to define said array of vane slots, said first plate being fixed to said second plate; and wherein the second wall member comprises at least a third co-axial plate that is axially adjacent to said second plate, said third plate defining a third array of openings which overlie the second array of openings defined by the second plate so as to further define said array of vane slots. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A variable geometry turbine comprising:
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a turbine wheel supported in a housing for rotation about a turbine axis; an annular inlet passage defined between respective radial inlet surfaces of first and second wall members, at least one of said first and second wall members being moveable along the turbine axis to vary the size of the inlet passage; an array of vanes extending across the inlet passage, said vanes being connected to said first wall member; a complementary array of vane slots defined by the second wall member, said vane slots being configured to receive said vanes to accommodate relative movement between the first and second wall members; wherein the second wall member comprises at least two axially adjacent co-axial plates, a first of said plates defining a first array of openings which overlie a second array of openings defined by a second of said plates so as to define said array of vane slots, said first plate being fixed to said second plate; wherein said first plate comprises first and second segments defining respective first and second openings from said first array of openings, said first segment being displaceable relative to said second segment within a major plane of the first plate; and wherein each of said segments comprises generally radially extending leading and trailing edges connected by radially inner and outer edges; wherein said second plate comprises first and second segments defining respective first and second openings from said second array of openings, said first segment of the second plate being displaceable relative to said second segment of the second plate within a major plane of the second plate. - View Dependent Claims (12, 13)
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14. A variable geometry turbine comprising:
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a turbine wheel supported in a housing for rotation about a turbine axis; an annular inlet passage defined between respective radial inlet surfaces of first and second wall members, at least one of said first and second wall members being moveable along the turbine axis to vary the size of the inlet passage; an array of vanes extending across the inlet passage, said vanes being connected to said first wall member; a complementary array of vane slots defined by the second wall member, said vane slots being configured to receive said vanes to accommodate relative movement between the first and second wall members; wherein the second wall member comprises at least two axially adjacent co-axial plates, a first of said plates defining a first array of openings which overlie a second array of openings defined by a second of said plates so as to define said array of vane slots, said first plate being fixed to said second plate; and wherein said first plate comprises first and second segments defining respective first and second openings from said first array of openings, said first segment being displaceable relative to said second segment within a major plane of the first plate; and wherein each of said segments comprises radially extending leading and trailing edges connected by radially inner and outer edges; and wherein at least one of said leading and trailing edges is curved relative to a radial line passing through said segment and the turbine axis; and wherein said second plate comprises first and second segments defining respective first and second openings from said second array of openings, said first segment of the second plate being displaceable relative to said second segment of the second plate within a major plane of the second plate; and wherein a clearance is defined between the leading edge of one segment of the first plate and the trailing edge of a neighboring segment of the first plate; and wherein a further clearance is defined between the leading edge of one segment of the second plate and the trailing edge of a neighboring segment of the second plate. - View Dependent Claims (15)
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16. A variable geometry turbine comprising:
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a turbine wheel supported in a housing for rotation about a turbine axis; an annular inlet passage defined between respective radial inlet surfaces of first and second wall members, at least one of said first and second wall members being moveable along the turbine axis to vary the size of the inlet passage; an array of vanes extending across the inlet passage, said vanes being connected to said first wall member; a complementary array of vane slots defined by the second wall member, said vane slots being configured to receive said vanes to accommodate relative movement between the first and second wall members; wherein the second wall member comprises a first plate defining a first array of openings so as to define said array of vane slots, said first plate comprising first and second segments defining respective first and second openings from said first array of openings, said first segment being displaceable relative to said second segment within a major plane of the first plate; wherein the second wall member comprises a second plate which is positioned axially adjacent to the first plate and said second plate being arranged co-axially with respect to said first plate, the first plate defining a first array of openings which overlie a second array of openings defined by the second plate so as to define said array of vane slots; and wherein said second plate comprises first and second segments defining respective first and second openings from said second array of openings, said first segment of the second plate being displaceable relative to said second segment of the second plate within a major plane of the second plate. - View Dependent Claims (17, 18)
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19. A variable geometry turbine comprising:
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a turbine wheel supported in a housing for rotation about a turbine axis; an annular inlet passage defined between respective radial inlet surfaces of first and second wall members, at least one of said first and second wall members being moveable along the turbine axis to vary the size of the inlet passage; an array of vanes extending across the inlet passage, said vanes being connected to said first wall member; a complementary array of vane slots defined by the second wall member, said vane slots being configured to receive said vanes to accommodate relative movement between the first and second wall members; wherein the second wall member comprises a first plate defining a first array of openings so as to define said array of vane slots, said first plate comprising first and second segments defining respective first and second openings from said first array of openings, said first segment being displaceable relative to said second segment within a major plane of the first plate; and wherein the second wall member further comprises a second plate that is positioned axially adjacent to the first plate and said second plate being arranged co-axially with respect to said first plate, the first plate defining a first array of openings that overlie a second array of openings defined by the second plate so as to define said array of vane slots; and wherein said second plate comprises first and second segments defining respective first and second openings from said second array of openings, said first segment of the second plate being displaceable relative to said second segment of the second plate within a major plane of the second plate; and wherein a clearance is defined between the leading edge of one segment of the first plate and the trailing of a neighboring segment of the first plate; and wherein a further clearance is defined between the leading edge of one segment of the second plate and the trailing edge of a neighboring segment of the second plate. - View Dependent Claims (20)
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Specification