Valve assembly for a multi-scroll turbine

Patent metadata

Field	Value
Publication number	US-11434813-B2
Application number	US-201916981746-A
Country	US
Kind code	B2
Filing date	Feb 22, 2019
Priority date	Mar 27, 2018
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

The invention relates to a valve assembly ( 100 ) for a multi-scroll turbine ( 10 ) for controlling an overflow of exhaust gases between a first spiral ( 36 ) and a second spiral ( 38 ) and for controlling a bypass opening ( 50 ). The valve assembly 100 comprises a lever ( 110 ) and a valve closing element ( 120 ) which is operatively connected to the lever ( 110 ). Furthermore, the valve assembly ( 100 ) comprises a spring element ( 130 ) which is designed to pre-bias the valve closing element ( 120 ) the against lever ( 110 ).

First claim

The invention claimed is:

1. A valve assembly ( 200 ) for a multi-scroll turbine ( 10 ) for controlling an overflow of exhaust gases between a first spiral ( 36 ) and a second spiral ( 38 ) and for controlling a bypass opening ( 50 ), wherein the valve assembly ( 200 ) comprises:
a lever ( 210 ) and
a valve closing element ( 220 ) which is operatively connected to the lever ( 210 ),
characterized in that
the valve closing element ( 220 ) is designed as at least partially hollow and comprises a cylindrical projection ( 222 ) which extends centrally from the bottom ( 221 ) of the hollow valve closing element ( 220 ) into a cavity ( 224 ) of the valve closing element ( 220 ), and the lever ( 210 ) has a valve section ( 212 ) with a substantially hollow cylindrical end region ( 214 ) which is arranged in the cavity ( 224 ) and surrounds the cylindrical projection ( 222 ) so that the lever ( 210 ) is operatively connected to the valve closing element ( 220 ),
wherein the valve closing element ( 220 ) has an inner contour ( 228 ) and an outer contour ( 229 ), the outer counter ( 229 ) comprising a first contour section ( 229 a ) and a second contour section ( 229 b ), the first contour section ( 229 a ) being defined by first, second and third surfaces ( 225 a , 225 b , 225 c ) which define first, second and third radii ( 325 a , 325 b , 325 c ) of different curvatures, respectively, and
wherein the cylindrical projection ( 222 ) extends above the valve closing element ( 220 ), characterized in that the valve closing element ( 220 ) has a closing element sliding contact surface ( 226 ) on which a first sliding contact surface ( 216 ) of the lever ( 210 ) may slide, wherein the first sliding contact surface ( 216 ) is curved and defines a first radius of curvature, and wherein the closing element sliding contact surface ( 226 ) is one of a conical sliding contact surface and a curved sliding contact surface such that when the closing element sliding contact surface ( 226 ) is a curved sliding contact surface, the radius of curvature of the closing element sliding contact surface ( 226 ) is greater than the first radius of curvature.

2. The valve assembly ( 200 ) according to claim 1 , characterized in that the sliding contact surface ( 226 ) is arranged on an inner contour ( 228 ) of the valve closing element ( 220 ).

3. The valve assembly ( 100 ; 200 ) according to claim 1 , characterized in that the valve closing element ( 120 ; 220 ) has an inner contour ( 128 ; 228 ) and an outer contour ( 129 ; 229 ), wherein the outer contour ( 129 ; 229 ) is configured to be substantially rotationally symmetrical or oval, in particular ellipse shaped, wherein a primary axis ( 121 a ; 221 a ) of the ellipse is arranged along a valve region ( 42 ), which extends between the first spiral ( 36 ) and the second spiral ( 38 ).

4. The valve assembly ( 200 ) according to claim 1 , characterized in that the first radii is from 30 to 60 mm, the second radii is from 2 to 6 mm, and the third radii is from 30 to 60 mm.

5. The valve assembly ( 200 ) according to claim 1 , additionally comprising a spring element ( 230 ) which is designed to pre-bias the valve closing element ( 220 ) against the lever ( 210 ).

6. The valve assembly ( 100 ; 200 ) according to claim 5 , characterized in that the lever ( 110 ; 210 ) has a second sliding contact surface ( 118 ; 218 ) being a curved or conical sliding contact surface ( 118 ; 218 ) on which a first sliding contact surface ( 136 ; 236 ) of the spring element ( 130 ; 230 ) may slide.

7. The valve assembly ( 200 ) according to claim 5 , characterized in that the lever ( 210 ) comprises a first annular projection ( 214 a ) and a second annular projection ( 214 b ), wherein the first annular projection ( 214 a ) extends radially outward from the hollow cylindrical end region ( 214 ) and is spaced axially apart from the second annular projection ( 214 b ) along a hollow cylindrical axis ( 222 a ).

8. The valve assembly ( 200 ) according to claim 1 , characterized in that the lever ( 210 ) comprises a first annular projection ( 214 a ) and a second annular projection ( 214 b ), wherein the first annular projection ( 214 a ) extends radially outward from the hollow cylindrical end region ( 214 ) and is spaced axially apart from the second annular projection ( 214 b ) along a hollow cylindrical axis ( 222 a ).

9. The valve assembly ( 200 ) according to claim 8 , characterized in that the first sliding contact surface ( 216 ) is arranged on the first annular projection ( 214 a ), wherein the first annular projection ( 214 a ) is located in a contact region ( 206 ) between the valve closing element ( 220 ) and the lever ( 210 ) on the bottom ( 221 ) of the cavity ( 224 ).

10. The valve assembly ( 100 ; 200 ) according to claim 1 , characterized in that the valve closing element ( 120 ; 220 ) is designed in such a way that, in the installed state, it can be brought into engagement with a valve region ( 42 ) in a connection region ( 40 ) between the first spiral ( 36 ) and the second spiral ( 38 ), wherein a seal ( 160 ; 260 ) is designed between the valve closing element ( 120 ; 220 ) and the connection region ( 40 ).

11. The valve assembly ( 100 ) according to claim 10 , wherein the valve region ( 42 ) and the valve closing element ( 120 ; 220 ) engage into each other in the closing direction in such a way that, at least in the closed state of the valve closing element ( 120 ; 220 ), an overlap by the valve region ( 42 ) and the valve closing element ( 120 ; 220 ) is present in the direction from the first spiral ( 36 ) to the second spiral ( 38 ).

12. A valve assembly ( 100 ) for a multi-scroll turbine ( 10 ) for controlling an overflow of exhaust gases between a first spiral ( 36 ) and a second spiral ( 38 ) and for controlling a bypass opening ( 50 ), wherein the valve assembly ( 100 ) comprises:
a lever ( 110 ) and
a valve closing element ( 120 ) which is operatively connected to the lever ( 110 ),
characterized by
a spring element ( 130 ) which is designed to pre-bias the valve closing element ( 120 ) against the lever ( 110 ),
wherein the valve closing element ( 120 ) has an inner contour ( 128 ) and an outer contour ( 129 ), the outer counter ( 129 ) comprising a first contour section ( 129 a ) and a second contour section ( 129 b ), the first contour section ( 129 a ) being defined by first, second and third surfaces ( 125 a , 125 b , 125 c ) which define first, second and third radii ( 325 a , 325 b , 325 c ) of different curvatures, respectively, and
wherein a cylindrical projection ( 222 ) extends above the valve closing element ( 120 ) characterized in that the valve closing element ( 220 ) has a closing element sliding contact surface ( 226 ) on which a first sliding contact surface ( 216 ) of the lever ( 210 ) may slide, wherein the first sliding contact surface ( 216 ) is curved and defines a first radius of curvature, and wherein the closing element sliding contact surface ( 226 ) is one of a conical sliding contact surface and a curved sliding contact surface such that when the closing element sliding contact surface ( 226 ) is a curved sliding contact surface, the radius of curvature of the closing element sliding contact surface ( 226 ) is greater than the first radius of curvature.

13. The valve assembly ( 100 ) according to claim 12 , characterized in that the sliding contact surface ( 126 ) is arranged on an inner contour ( 128 ) of the valve closing element ( 120 ).

14. The valve assembly ( 100 ) according to claim 12 , characte

Assignees

• Borgwarner Inc

Inventors

• Ebert Stefan
• Cempirek Ondrej
• Injac Ivan
• Witteck Patrick
• Walkingshaw Jason Robert

Classifications

• F02B37/183

  Arrangements of bypass valves or actuators therefor · CPC title

• F02B37/025

  Multiple scrolls or multiple gas passages guiding the gas to the pump drive · CPC title

• F05D2240/14

  Casings or housings protecting or supporting assemblies within · CPC title

• F01D17/146

  by throttling the volute inlet of radial machines or engines · CPC title

• F02C9/18 Primary

  by bleeding, bypassing or acting on variable working fluid interconnections between turbines or compressors or their stages {(F02C3/113 takes precedence)} · CPC title