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Diaphragm and pulsation damper using the same

A technology of pulsation damper and diaphragm, which is applied in the direction of engine components, machines/engines, charging systems, etc., can solve problems such as insufficient pressure load, and achieve the effect of reducing large pulsation

Active Publication Date: 2019-12-20
FUJIKOKI MFG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the pulsation damper described in Patent Document 1, the amount of volume change is not sufficiently large for the pressure load from the outside of the pulsation damper, so the pulsation (caused by high pressure large pressure fluctuations) fully absorb the concerns of

Method used

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  • Diaphragm and pulsation damper using the same
  • Diaphragm and pulsation damper using the same
  • Diaphragm and pulsation damper using the same

Examples

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Embodiment Construction

[0034] figure 1 is a cross-sectional view of the diaphragm 10 according to the first embodiment of the present invention cut on a virtual plane including the center line (vertical line) O1 of the diaphragm 10, figure 2 yes figure 1 A top view of the diaphragm 10 is shown. In the description below, the figure 1 Such a cross section cut on an imaginary plane is called a "central cross section".

[0035] Generally, the pulsation damper is used with an inert gas sealed inside the protruding portion of the diaphragm at a pressure higher than atmospheric pressure, however, figure 1 and figure 2 A case is shown in which no gas is enclosed in the protruding portion 10A, and the pressure on the outer wall side (protruding side) of the protruding portion 10A is the same as the pressure on the inner wall side.

[0036] Such as figure 1 and figure 2 As shown, the diaphragm 10 of the first embodiment is formed such that the outer shape is circular (the horizontal cross-section of...

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PUM

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Abstract

The present invention provides a diaphragm, which is formed from a thin metal plate. The diaphragm has a flange portion and a protruding portion configured to protrude to one side of the flange portion. The pressure on the outer wall side of the protruding portion In the same state as the pressure on the inner wall side, the protruding portion has a planar top and at least two annular bent portions annularly provided on the radially outer side of the top, in order to include the diaphragm. In a cross-section taken on a virtual plane of the center line, at least two of the annular curved portions are formed in a curved manner, and the centers of curvature of the at least two annular curved portions are arranged opposite to the protruding direction of the protruding portion. different positions on the side.

Description

technical field [0001] The invention relates to a diaphragm and a pulsation damper using the diaphragm, in particular to a diaphragm capable of effectively reducing the pulsation generated in a fuel pump and a pulsation damper using the diaphragm. Background technique [0002] A pulsation damper is known in which, in a conventional high-pressure fuel pump or the like, the fuel sucked into the pressurized chamber from the suction passage is absorbed by a diaphragm provided in a low-pressure fuel passage that supplies fuel to the pressurized chamber of the housing main body. The pulsation of the fluid is reduced (for example, refer to Patent Document 1). [0003] In such a conventional pulsation damper, the diaphragm is formed by pressing a metal plate such as stainless steel, has a protruding portion in one direction, and the top portion (central portion) of the protruding portion is parallel to the flange on the outer periphery. plane. [0004] And, weld the whole circumfe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M59/44F02M59/36
CPCF02M37/0041F02M59/44F02M59/36
Inventor 富塚真弘吉田真须藤真南部晶纪菱沼修山田浩敦
Owner FUJIKOKI MFG CO LTD