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Exhaust bypass valve for turbocharger

一种涡轮增压器、旁通阀的技术，应用在升阀、阀装置、燃气轮机装置等方向，能够解决控制性恶化等问题，达到抑制转角变动、衰减性高的效果

Inactive Publication Date: 2011-01-19
MITSUBISHI HEAVY IND ENGINE & TURBOCHARGER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the shaft 207 of the valve is worn, the controllability will be deteriorated due to the increase of sway, so it is desirable to configure a structure that reduces wear.

Method used

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  • Exhaust bypass valve for turbocharger
  • Exhaust bypass valve for turbocharger
  • Exhaust bypass valve for turbocharger

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0087] figure 1 The exhaust bypass valve 1 according to the first embodiment of the present invention is shown. figure 2 It is a plan view in which a part of the exhaust bypass valve 1 is cut away. The illustrated exhaust bypass valve 1 has a structure in which a turbine inlet-side flow path 3 and a turbine outlet-side flow path 4 separated by a partition wall 2 are short-circuited and communicated by a short-circuit flow path 5 . The exhaust bypass valve 1 has a valve flap 6 that covers the short-circuit flow path 5 in a cap-like manner. The valve flap 6 is supported by one end of an arm 6a, and the arm 6a is supported around a shaft 7 as a rotation center. One end of a rod 8 is also fixed to the shaft 7 , and the other end side of the rod 8 is driven to open and close by a driver 9 . The shaft 7 is rotatably supported by a bush 13 , and the bush 13 is fitted to a housing (fixed-side member) 14 . From figure 1 The front side of the paper faces the inner side, and the ...

no. 2 approach

[0094] Figure 5 A wastegate valve 21 according to a second embodiment of the present invention is shown. In addition, the structure of the flap 6 etc. is substantially the same as that of 1st Embodiment mentioned above, and the same code|symbol is used for the same structure, and the description is abbreviate|omitted.

[0095] In the present embodiment, the turbine inlet-side flow path 3 and the turbine outlet-side flow path 4 partitioned by the partition wall 22 are short-circuited and communicated by the short-circuit flow path 25 .

[0096] The short-circuit flow path 25 is inclined so as to approach the rotation axis center side of the shaft 7 from the turbine inlet-side flow path 3 toward the turbine outlet-side flow path 4 . As a result, a pressure increase region 30 is formed at the peripheral wall edge portion of the turbine outlet-side flow path 4 of the short-circuit flow path 25 on the side closer to the shaft 7 .

[0097] According to this structure, the short-c...

no. 3 approach

[0100] Figure 7 An exhaust bypass valve 31 according to a third embodiment of the present invention is shown. In addition, the structure of the flap 6 etc. is substantially the same as that of 1st Embodiment mentioned above, and the same code|symbol is used for the same structure, and the description is abbreviate|omitted.

[0101] In the present embodiment, the turbine inlet-side flow path 3 and the turbine outlet-side flow path 4 partitioned by the partition wall 32 are short-circuited and communicated by the short-circuit flow path 35 .

[0102] The flow passage 3 on the turbine inlet side is approximately parallel to the sealing surface 6b of the disc 6 of the exhaust bypass valve 31 in the vicinity of the exhaust bypass valve 31, and the short-circuit flow passage 35 branches off from the flow passage 3 on the turbine inlet side and flows to the outlet side of the turbine. Road 4 is short-circuited and connected. The short-circuit flow path 35 is inclined in the return...

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Abstract

Provided is an exhaust bypass valve which is enabled to prevent the deterioration of controllability by reducing the wear of a spindle. A turbocharger exhaust bypass valve (1) comprises a shorting passage (5) for affording communication between a turbine entrance side passage (3) and a turbine exit side passage (4), and a valve flap (6) for opening and closing the shorting passage (5). The valve flap (6) is opened and closed to short gas flowing in the turbine entrance side passage (3), to the turbine exit side passage (4). The valve flap (6) is supported on one side rotatably and is brought on the other side to and from the shorting passage (5) thereby to close and open the shorting passage (5). At least one of the open edge portion of the shorting passage (5) facing the valve flap (6) and the side face of the valve flap (6) facing the shorting passage (5) is equipped with a taper portion (10) on the other side edge portion.

Description

technical field [0001] The invention relates to exhaust bypass valves for turbochargers. Background technique [0002] In a turbocharger, an exhaust bypass valve is provided to prevent excess gas from flowing into the turbine. The exhaust bypass valve is a valve that opens and closes a flow path that short-circuits a turbine inlet and a turbine outlet. [0003] Exhaust bypass valves mostly use rotary valves with simple structure. Figure 30 An exhaust bypass valve 201 of a conventional turbocharger is shown. The turbine inlet-side flow path 203 and the turbine outlet-side flow path 204 separated by the partition wall 202 are short-circuited by a short-circuit flow path 205, and the exhaust bypass valve 201 has a valve disc 206 that covers the short-circuit flow. Road 205 covered. The valve flap 206 is supported on one arm by an arm 206a, and the arm 206a is supported around a shaft 207 as a center of rotation. One end of a rod 208 is fixed to the shaft 207, and the other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/18F02B39/00F16K1/52
CPCF02C6/12F05B2220/40F01D17/105F01D25/30F02B37/183F05D2220/40Y02T10/144F01D17/12Y02T10/12
Inventor 林慎之久保田满繁横山隆雄东條正希
Owner MITSUBISHI HEAVY IND ENGINE & TURBOCHARGER LTD
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