On-off valve device and rotary machine

• US 10,450,887 B2
• Filed: 08/27/2014
• Issued: 10/22/2019
• Est. Priority Date: 08/27/2014
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Inventors: Higashimori, Hirotaka
• Primary Examiner(s): Gimie, Mahmoud
• Application Number:
  US15/329,640
• Publication Number:
  US 20170218836A1
• Time in Patent Office: 1,882 Days
• Field of Search: 415151
• CPC Class Codes: F01D 17/105 by passing part of the fluid
• CPC Class Codes: F01D 17/14 varying effective cross-sectional area of nozzles or guide conduits
• CPC Class Codes: F01D 17/145 by means of valves, e.g. for steam turbines valves in general F16K
• CPC Class Codes: F01D 17/146 by throttling the volute inlet of radial machines or engines
• CPC Class Codes: F01D 17/148 by means of rotatable members, e.g. butterfly valves
• CPC Class Codes: F01D 17/18 varying effective number of nozzles or guide conduits , e.g. sequentially operable valves for steam turbines
• CPC Class Codes: F01D 25/24 Casings modified for heating or cooling F01D25/14; Casing parts, e.g. diaphragms, casing fastenings casings for rotary machines or engines in general F16M ; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045
• CPC Class Codes: F01D 5/04 for radial-flow machines or engines
• CPC Class Codes: F01D 5/12 Blades specially adapted for radial flow machines or engines F01D5/04; blade roots F01D5/30; rotors with blades adjustable in operation F01D7/00; stator blades F01D9/02
• CPC Class Codes: F01D 5/145 Means for influencing boundary layers or secondary circulations for compressors F04D29/68
• CPC Class Codes: F01D 9/026 Scrolls for radial machines or engines
• CPC Class Codes: F02B 37/025 Multiple scrolls or multiple gas passages guiding the gas to the pump drive
• CPC Class Codes: F02B 37/22 by varying cross-section of exhaust passages or air passages , e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits F02B37/24 takes precedence
• CPC Class Codes: F05D 2220/40 in turbochargers
• CPC Class Codes: F05D 2240/60 Shafts
• CPC Class Codes: F05D 2250/15 spiral
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A turbocharger is provided with a valve body which is disposed in a suction flow path leading from an inflow port of a housing covering a turbine rotor blade to a scroll portion and composed of a single piece or multiple divided pieces to supply a fluid to the turbine rotor blade with the inner surface thereof formed using a first wall surface and a second wall surface facing the first wall surface as part thereof, extends from the upstream side to the downstream side of the flow of the fluid, is rotatably provided in the housing in a direction toward and away from the first wall surface and the second wall surface, forms an upstream-side narrowed flow path with the first wall surface therebetween at an end on the upstream side, and forms a downstream-side narrowed flow path with the second wall surface therebetween at an end on the downstream side. The valve body has a first surface at the end on the upstream side, which faces the first wall surface, gradually approaches the first wall surface from the upstream side to the downstream side and thereafter gradually goes away therefrom, and a second surface which faces the second wall surface.

Claims

1. An on-off valve device comprising a valve body which is disposed in a suction flow path which leads from an inflow port of a housing covering a turbine rotor blade to a scroll portion and is configured of a single piece or multiple divided pieces to supply a fluid to the turbine rotor blade with an inner surface of the suction flow path formed using a first wall surface and a second wall surface facing the first wall surface as a portion of the suction flow path, extends from the upstream side toward the downstream side of the flow of the fluid, is rotatably provided in the housing in a direction toward and away from the first wall surface and the second wall surface, forms an upstream-side narrowed flow path between the first wall surface and the valve body at an end on the upstream side, and forms a downstream-side narrowed flow path between the second wall surface and the valve body at an end on the downstream side;

and

a rotary portion configured to rotate the valve body about an axis which is a rotation center of the valve body,

wherein in the rotary portion, the axis is positioned outside the valve body,

wherein in the valve body, the end on the upstream side is an end facing the first wall surface, and the end on the upstream side is formed of a first surface which gradually goes away from the first wall surface after gradually approaches the first wall surface from the upstream side toward the downstream side, and

wherein the valve body includes a second surface which faces the second wall surface at the end on the downstream side,

wherein the valve body is fully opened when the first surface is parallel to the first wall surface,

the valve body is fully closed when the leading edge of the valve body comes into contact with the first wall surface along with the trailing edge comes into contact with the second wall surface,

the opening degree of the valve body is indicated as an inclination angle of the trailing edge of the valve body in a direction from the first wall surface to the second wall surface,

in an intermediate opening degree of the valve body between a fully close condition and a fully open condition of the valve body, the leading edge of the valve body approaches the first wall surface and the trailing edge approaches the second wall surface.

2. The on-off valve device according to claim 1,

wherein an upstream-side opening which is open to the second surface, a downstream-side opening which is open to the first surface on the downstream side of the upstream-side opening, and a through hole portion which connects the upstream-side opening and the downstream-side opening to each other and penetrates a portion between the first surface and the second surface are formed in the valve body.

3. The on-off valve device according to claim 1,

wherein the valve body includes a protrusion surface which gradually approaches the first wall surface toward the downstream side, a first recessed surface which is continued to the downstream side of the protrusion surface and is curved to be recessed toward the second surface, and a second recessed surface which is continued to the downstream side of the first recessed surface and is curved to be recessed toward the second surface with a curvature radius which is greater than that of the first recessed surface, as the first surface, and includes a protrusion surface which is cured to protrude toward the side going away from the first surface, as the second surface.

4. The on-off valve device according to claim 1,

wherein a rotary portion which rotates the valve body is separately provided from the housing.

5. The on-off valve device according to claim 1,

wherein multiple valve bodies are provided to be arranged in a row from the upstream side toward the downstream side, and

wherein rotary portions which individually rotate the valve bodies are provided.

6. A rotary machine, comprising:

a rotary shaft which rotates about an axis;

a turbine rotor blade which rotates along with the rotary shaft;

a housing which covers the rotary shaft and the turbine rotor blade and in which a suction flow path through which a fluid is supplied to the turbine rotor blade is formed; and

the on-off valve device according to claim 1 in which the valve body is provided in the suction flow path of the housing.

7. The rotary machine according to claim 6,

wherein in the housing, the second wall surface is formed of a division wall surface which divides the scroll portion into two paths in the direction intersecting the flow direction of the fluid.

8. The on-off valve device according to claim 2,

wherein the valve body includes a protrusion surface which gradually approaches the first wall surface toward the downstream side, a first recessed surface which is continued to the downstream side of the protrusion surface and is curved to be recessed toward the second surface, and a second recessed surface which is continued to the downstream side of the first recessed surface and is curved to be recessed toward the second surface with a curvature radius which is greater than that of the first recessed surface, as the first surface, and includes a protrusion surface which is cured to protrude toward the side going away from the first surface, as the second surface.

9. The on-off valve device according to claim 2,

wherein a rotary portion which rotates the valve body is separately provided from the housing.

10. The on-off valve device according to claim 3,

wherein a rotary portion which rotates the valve body is separately provided from the housing.

11. The on-off valve device according to claim 2,

wherein multiple valve bodies are provided to be arranged in a row from the upstream side toward the downstream side, and

wherein rotary portions which individually rotate the valve bodies are provided.

12. The on-off valve device according to claim 3,

wherein multiple valve bodies are provided to be arranged in a row from the upstream side toward the downstream side, and

wherein rotary portions which individually rotate the valve bodies are provided.

13. The on-off valve device according to claim 4,

wherein multiple valve bodies are provided to be arranged in a row from the upstream side toward the downstream side, and

wherein rotary portions which individually rotate the valve bodies are provided.

14. A rotary machine, comprising:

a rotary shaft which rotates about an axis;

a turbine rotor blade which rotates along with the rotary shaft;

a housing which covers the rotary shaft and the turbine rotor blade and in which a suction flow path through which a fluid is supplied to the turbine rotor blade is formed; and

the on-off valve device according to claim 2 in which the valve body is provided in the suction flow path of the housing.

15. A rotary machine, comprising:

a rotary shaft which rotates about an axis;

a turbine rotor blade which rotates along with the rotary shaft;

a housing which covers the rotary shaft and the turbine rotor blade and in which a suction flow path through which a fluid is supplied to the turbine rotor blade is formed; and

the on-off valve device according to claim 3 in which the valve body is provided in the suction flow path of the housing.

16. A rotary machine, comprising:

a rotary shaft which rotates about an axis;

a turbine rotor blade which rotates along with the rotary shaft;

a housing which covers the rotary shaft and the turbine rotor blade and in which a suction flow path through which a fluid is supplied to the turbine rotor blade is formed; and

the on-off valve device according to claim 4 in which the valve body is provided in the suction flow path of the housing.

17. A rotary machine, comprising:

a rotary shaft which rotates about an axis;

a turbine rotor blade which rotates along with the rotary shaft;

a housing which covers the rotary shaft and the turbine rotor blade and in which a suction flow path through which a fluid is supplied to the turbine rotor blade is formed; and

the on-off valve device according to claim 5 in which the valve body is provided in the suction flow path of the housing.

18. The on-off valve device according to claim 1, wherein the opening degree of the valve body is within a range from 15°

to 45°

.