US4880351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable capacity turbine
Assignee: Honda Motor Co Ltd
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Filing: 1987-05-27
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Granted: 1989-11-14
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Expires: 2007-05-27
Abstract
Abstract Disclosed is a turbine comprising a turbine wheel, a turbine scroll passage defined in a turbine casing around the turbine wheel for introduction of gas to the turbine wheel, and an axial central passage defined in the turbine casing for ejection of gas from the turbine wheel, wherein: a plurality of variable nozzles are arranged outside of a throat section having a locally minimum cross section which is defined in the turbine casing around the turbine wheel. The variable nozzles may be defined by fixed vanes and moveable vanes which cooperate with each other in such a manner that each of the moveable vanes and the corresponding fixed vane define a substantially smooth and continuous airfoil. The moveable vanes may be pivotally supported by a back plate of the casing while the fixed vanes may be integrally provided with a fixed vane member having a disk portion which defines a surface opposing the inner surface of the back plate. The moveable vanes may rotate along and between these mutually opposing surfaces for varying the cross section of the nozzles defined between the fixed vanes and the moveable vanes.
Inventors
- 👤 Kazuo Inoue
- 👤 Osamu Kubota
- 👤 Shunji Yano
- 👤 Fusao Tateishi
- 👤 Etsuo Noda
- 👤 Koji Yamaguchi
- 👤 Tsuneo Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:41
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/16; F01D17/165
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
113 words
A radial in-flow turbine comprising a turbine wheel, a turbine scroll passage defined in a turbine casing around the turbine wheel for introduction of gas to the turbine wheel, and an axial central passage defined in the turbine casing for ejection of gas from the turbine wheel. wherein: a plurality of variable nozzles, having an axial width, are arranged concentrically with respect to the turbine wheel and inside of the turbine casing and outside of an annular throat section defined inside the turbine casing concentric to the turbine wheel and having a locally minimum axial width less than said nozzle axial width, said variable nozzles are defined by fixed vanes and moveable vanes.
Claim 2
Dependent Claim
113 words
A radial in-flow turbine comprising a turbine wheel, a turbine scroll passage defined in a turbine casing around the turbine wheel for introduction of gas to the turbine wheel, and an axial central passage defined in the turbine casing for ejection of gas from the turbine wheel. wherein: a plurality of variable nozzles, having an axial width, are arranged concentrically with respect to the turbine wheel and inside of the turbine casing and outside of an annular throat section defined inside the turbine casing concentric to the turbine wheel and having a locally minimum axial width less than said nozzle axial width, said variable nozzles are defined by fixed vanes and moveable vanes.
Claim 3
Dependent Claim
50 words
A variable capacity turbine as defined in claim 1, wherein the fixed vanes are comprised of arcuate vanes arranged along a circle which is concentric to the turbine wheel and the moveable vanes are adapted to rotate along a plane which is perpendicular to the axial line of the turbine.
Claim 4
Dependent Claim
65 words
A variable capacity turbine as defined in claim 2, wherein the moveable vanes are each provided with a center of rotation at its base end which is adjacent to one of the fixed vanes and are adapted to rotate between a most closed position which is substantially aligned with the circle and a most open position which is inclined inwardly with respect to the circle.
Claim 5
Dependent Claim
27 words
A variable capacity turbine as defined in claim 3, wherein each of the fixed vanes and the corresponding moveable vane define a substantially continuous and smooth airfoil.
Claim 6
Dependent Claim
133 words
A variable capacity turbine as defined in claim 4, further comprising: a fixed vane member having a disk portion which defines a surface opposing an inner surface of a back plate which covers an axial end of the turbine casing remote from an axial end of the central axial passage and the fixed vanes arranged at an equal interval along a peripheral portion of the disk portion radially outside of the outer periphery of the turbine wheel and extend axially towards the back plate; moveable vane members having the moveable vanes and pivot means for supporting the moveable vanes in a rotatable manner along and between the opposing surfaces of the disk portion and the back plate; fastener means for connecting an axial free ends of the fixed vanes to the back plate.
Claim 7
Dependent Claim
20 words
A variable capacity turbine as defined in claim 5, wherein the moveable vanes are pivotally supported by the back plate.
Claim 8
Dependent Claim
42 words
A variable capacity turbine as defined in claim 6, wherein the gap defined by the back plate and the disk portion for receiving one of the moveable vane is flared from an outer circumferential portion thereof to an inner circumferential portion thereof.
Claim 9
Dependent Claim
47 words
A variable capacity turbine as defined in claim 7, wherein the disk portion of the fixed vane member is provided with a central tubular portion which is adapted to be connected to an internal end of the axial passage in a substantially air tight and floating manner.
Claim 10
Dependent Claim
49 words
A variable capacity turbine as defined in claim 8, wherein the minimum opening angle of the moveable vanes is determined by the side edges of the moveable vanes contacting complementary shoulders formed in at least one of the back plate and the disk portion of the fixed vane member.
Claim 11
Dependent Claim
55 words
A variable capacity turbine as defined in claim 9, wherein an overlap along the circumferential direction is provided between the leading edge of each of the fixed vanes and the trailing edge of the corresponding moveable vane, the ratio of this overlap to the axial width of the moveable vane being from 20 to 60%.
Claim 12
Dependent Claim
28 words
A variable capacity turbine as defined in claim 10, wherein the ratio of the overlap to the axial width of the moveable vane is from 20 to 30%.
Claim 13
Dependent Claim
38 words
A variable capacity turbine as defined in claim 1, wherein the opening areas of the variable nozzles are each defined by a fixed axial width and a variable width extending in a direction perpendicular to the axial direction.
Claim 14
Dependent Claim
191 words
A turbine comprising a turbine wheel, a turbine scroll passage defined in a turbine casing around the turbine wheel for introduction of gas to the turbine wheel, and an axial central passage defined in the turbine casing for ejection of gas from the turbine wheel, comprising: a plurality of fixed vanes and movable vanes arranged around the turbine wheel in alternating fashion located inside said turbine casing and outside of an annular throat section; each of the movable vanes being pivoted at its base end adjacent to a trailing edge of an adjacent one of the fixed vanes rotatable between a first position, in which the fixed vanes and movable vanes are substantially aligned with a circle and a free end of the movable vane adjoins a leading edge of the adjacent fixed vane along a circumferential direction so as to define a minimally open nozzle therebetween, and a second position, in which said movable vanes are rotated inwardly toward the turbine wheel so as to define a maximally open nozzle between the free end of each of the movable vanes and the leading edge of the corresponding adjacent fixed vane.
Claim 15
Dependent Claim
191 words
A turbine comprising a turbine wheel, a turbine scroll passage defined in a turbine casing around the turbine wheel for introduction of gas to the turbine wheel, and an axial central passage defined in the turbine casing for ejection of gas from the turbine wheel, comprising: a plurality of fixed vanes and movable vanes arranged around the turbine wheel in alternating fashion located inside said turbine casing and outside of an annular throat section; each of the movable vanes being pivoted at its base end adjacent to a trailing edge of an adjacent one of the fixed vanes rotatable between a first position, in which the fixed vanes and movable vanes are substantially aligned with a circle and a free end of the movable vane adjoins a leading edge of the adjacent fixed vane along a circumferential direction so as to define a minimally open nozzle therebetween, and a second position, in which said movable vanes are rotated inwardly toward the turbine wheel so as to define a maximally open nozzle between the free end of each of the movable vanes and the leading edge of the corresponding adjacent fixed vane.
Claim 16
Dependent Claim
162 words
A variable capacity turbine as defined in claim 13, further comprising: a fixed vane member having a disk portion which defines a surface opposing an inner surface of a back plate which covers an axial end of the turbine casing remote from an inlet end of the central axial passage and the fixed vanes arranged at an equal interval along a peripheral portion of the disk portion radially outside of the outer periphery of the turbine wheel and extend axially towards the back plate; moveable vane members having the moveable vanes and pivot means for supporting the moveable vanes with respect to the back plate in a rotatable manner along and between the opposing surfaces of the disk portion and the back plate in such a manner that each of the moveable vanes and the corresponding fixed vane define a substantially smooth and continuous airfoil; and fastener means for connecting an axial free ends of the fixed vanes to the back plate.
Claim 17
Dependent Claim
60 words
A variable capacity turbine as defined in claim 13, wherein the free end of each of the movable vanes overlaps the leading edge of the adjacent fixed vane along a circumferential direction when the movable vanes are rotated outwardly away from the turbine wheel so as to define a minimally open nozzle between the moveable vane and the fixed vane.
Claim 18
Dependent Claim
125 words
A radial in-flow turbine comprising a turbine wheel, a turbine scroll passage defined in a turbine casing around the turbine wheel for introduction of gas to the turbine wheel, and an axial central passage defined in the turbine casing for ejection of gas from the turbine wheel, wherein: a plurality of variable nozzles located inside said turbine casing and outside of an annular throat section, said nozzles comprised of a plurality of moveable vanes and fixed vanes arranged around the turbine wheel; the moveable vanes and fixed vanes being substantially aligned along a circle concentric to the turbine wheel and presenting substantially smooth inner and outer circumferential contour surfaces when the moveable vanes are positioned to define a minimally open state of the variable nozzles.
Claim 19
Dependent Claim
125 words
A radial in-flow turbine comprising a turbine wheel, a turbine scroll passage defined in a turbine casing around the turbine wheel for introduction of gas to the turbine wheel, and an axial central passage defined in the turbine casing for ejection of gas from the turbine wheel, wherein: a plurality of variable nozzles located inside said turbine casing and outside of an annular throat section, said nozzles comprised of a plurality of moveable vanes and fixed vanes arranged around the turbine wheel; the moveable vanes and fixed vanes being substantially aligned along a circle concentric to the turbine wheel and presenting substantially smooth inner and outer circumferential contour surfaces when the moveable vanes are positioned to define a minimally open state of the variable nozzles.
Claim 20
Dependent Claim
150 words
A radial in-flow turbine comprising a turbine wheel, a turbine scroll passage defined in a turbine casing around the turbine wheel for introduction of gas to the turbine wheel, and an axial central passage defined in the turbine casing for ejection of gas from the turbine wheel, wherein: a plurality of variable nozzles located inside said turbine casing and outside of an annular throat section, said nozzles comprised of a plurality of moveable vanes and fixed vanes having ends, said moveable vanes and fixed vanes arranged around the turbine wheel, and each of the moveable vanes and the corresponding fixed vanes define an airfoil having a substantially smooth contour, the end of each of the fixed vanes remote from the corresponding moveable vane defining the leading edge of the airfoil while the end of the moveable vane remote from the corresponding fixed vane defines the trailing edge of the airfoil.
Claim 21
Dependent Claim
150 words
A radial in-flow turbine comprising a turbine wheel, a turbine scroll passage defined in a turbine casing around the turbine wheel for introduction of gas to the turbine wheel, and an axial central passage defined in the turbine casing for ejection of gas from the turbine wheel, wherein: a plurality of variable nozzles located inside said turbine casing and outside of an annular throat section, said nozzles comprised of a plurality of moveable vanes and fixed vanes having ends, said moveable vanes and fixed vanes arranged around the turbine wheel, and each of the moveable vanes and the corresponding fixed vanes define an airfoil having a substantially smooth contour, the end of each of the fixed vanes remote from the corresponding moveable vane defining the leading edge of the airfoil while the end of the moveable vane remote from the corresponding fixed vane defines the trailing edge of the airfoil.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |