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Diaphragm actuator

An actuator, diaphragm technology, applied in engine components, combustion engines, machines/engines, etc., to solve problems such as increased contact sound

Active Publication Date: 2019-12-03
IHI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the contact sound becomes louder when the valve seat touches the spool

Method used

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  • Diaphragm actuator
  • Diaphragm actuator
  • Diaphragm actuator

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Experimental program
Comparison scheme
Effect test

no. 2 approach

[0068] Next, refer to Figure 5 , the diaphragm actuator 50B according to the second embodiment will be described. The diaphragm actuator 50B according to the second embodiment differs from the diaphragm actuator 50 of the first embodiment in that instead of the compression coil spring 66 , it is provided with an axial length shorter than that of the compression coil spring 66 . Compression coil spring 66B. In addition, in the description of the second embodiment, the same description as that of the first embodiment will be omitted.

[0069] The compression coil spring 66B has fewer helical turns than the compression coil spring 66 and has a shorter length in the axial direction in the extended state. One end of the compression coil spring 66B is attached to the inner wall surface of the rear wall 59 b of the high pressure chamber 55 by bonding or the like. The other end portion of the compression coil spring 66B is not fixed with respect to the high-pressure side retainer ...

no. 3 approach

[0073] Next, refer to Figure 6 , the diaphragm actuator 50C according to the third embodiment will be described. The diaphragm actuator 50C according to the third embodiment is different from the diaphragm actuator 50 of the first embodiment in that the compression coil spring 66 whose diameter becomes smaller as it goes to the other end side is replaced. , with a compression coil spring 69 whose coil diameter is uniform in the axial direction. In addition, in the description of the third embodiment, the same description as that of the first and second embodiments will be omitted.

[0074] The compression coil spring 69 includes: a first elastic portion 67 disposed on the other end side; and a second elastic portion 68 disposed on the one end side. The first elastic portion 67 is a portion near the other end of the compression coil spring 69 , and the second elastic portion 68 is a portion near one end of the compression coil spring 69 . The diameter of the helix of the fi...

no. 4 approach

[0085] Next, refer to Figure 7 , the diaphragm actuator 50D according to the fourth embodiment will be described. The diaphragm actuator 50D according to the fourth embodiment differs from the diaphragm actuator 50C of the third embodiment in that it includes a holding portion 73 that holds the compression coil spring 69 . In addition, in the description of the fourth embodiment, descriptions similar to those of the first to third embodiments are omitted.

[0086] The holding portion 73 is a recess formed on the rear wall 59 b of the high pressure chamber 55 . The holding portion 73 is recessed toward the outside in the axial direction of the working rod 51 . The holding portion 73 includes a cylindrical portion 73a and a rear wall 73b. The cylindrical portion 73 a is formed to protrude outward from the back wall 59 b in the axial direction of the actuation rod 51 . The other end side of the cylindrical part 73a is provided continuously with the back wall 59b. The back w...

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PUM

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Abstract

Provided is a diaphragm type actuator which drives an operation rod in an axial direction, including: a diaphragm which is connected to the operation rod; a high pressure chamber which is adjacent to one end side of the diaphragm in the axial direction; a low pressure chamber which is adjacent to the other end side of the diaphragm in the axial direction; and a return spring which is provided in the low pressure chamber and urges the diaphragm toward the high pressure chamber. Since an absorption portion is disposed inside the high pressure chamber, a force acting on the diaphragm is absorbed when the diaphragm moves toward the high pressure chamber and stops therein.

Description

technical field [0001] The present invention relates to diaphragm actuators. Background technique [0002] Conventionally, as an actuator for opening and closing a valve body of a waste gate valve in a turbocharger of an engine, for example, a diaphragm type actuator has been used (for example, refer to Patent Document 1). The diaphragm actuator has: a working rod connected to the spool; a diaphragm for driving the working rod; a low-pressure chamber and a high-pressure chamber adjacent to each other through the diaphragm in the axial direction of the working rod; Return spring that energizes the diaphragm. [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 7-269512 [0004] For example, when the wastegate valve is changed from the open state to the closed state, the valve body of the wastegate valve is in close contact with the valve seat (seat surface) which is the peripheral portion of the opening. If the driving force generated by the working rod is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B15/10F02B37/18
CPCF02B37/186F15B15/10F15B15/226Y02T10/12F16K31/1262
Inventor 许宰珉
Owner IHI CORP