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Structure for attaching metal diaphragm damper

A shock absorber and diaphragm technology, applied in charging systems, machines/engines, fuel injection devices, etc., can solve problems such as complex structure, cumbersome assembly operations, and high vibration reduction.

Inactive Publication Date: 2020-11-24
EAGLE INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The metal diaphragm damper of Patent Document 1 is capable of elastic deformation of each diaphragm and integral movement of both diaphragms, so it can achieve high vibration reduction capability, but a separate mounting part is used to hold the metal diaphragm damper, so the parts Large number, complex structure, cumbersome assembly work, etc.
In addition, since the jig-shaped holding portion clamps from the outer diameter edge portion of the welded portion of the diaphragm toward the inner diameter side, it affects the deformation of the deformable portion of the diaphragm on the inner diameter side than the welded portion.

Method used

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  • Structure for attaching metal diaphragm damper
  • Structure for attaching metal diaphragm damper
  • Structure for attaching metal diaphragm damper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] refer to Figure 1 to Figure 5 , the mounting structure of the metal diaphragm damper according to the first embodiment will be described.

[0038] The metal diaphragm shock absorber 1 of the present embodiment is as figure 1 As shown, a high-pressure fuel pump 10 is built in, and the high-pressure fuel pump 10 pressurizes fuel supplied from a fuel tank through a fuel inlet (not shown) to the injector side. The high-pressure fuel pump 10 pressurizes and discharges fuel by reciprocating a plunger 12 driven by the rotation of a camshaft (not shown) of the internal combustion engine.

[0039] As a structure for pressurizing and discharging fuel in the high-pressure fuel pump 10, first, when the plunger 12 descends, the suction valve 13 is opened to perform a suction stroke, and fuel is sucked into the pressurization chamber 14 from the fuel chamber 11 formed on the fuel inlet side. . Next, when the plunger 12 rises, the volume adjustment (flow adjustment) stroke is per...

Embodiment 2

[0065] Below, refer to Image 6 , the mounting structure of the metal diaphragm damper according to the second embodiment will be described. In addition, the same code|symbol is attached|subjected to the same component as the component shown in the said Example, and repeated description is abbreviate|omitted.

[0066] Such as Image 6 As shown in (a), the convex portion 16c' of the case 16 and the convex portion 17b' of the case cover 17 in the second embodiment are arranged closer to each other than in the first embodiment, and the outer peripheral parts 21, 21 In a state sandwiched between the convex portion 16c' and the convex portion 17b', the metal diaphragm damper 1 is in a state where the outer peripheral portions 21, 21 are in contact with each other in the plate thickness direction.

[0067] Such as Image 6 As shown in (b), when the part of the diaphragm 2a, 2b that is closer to the welding part W receives a large vibration from one side to the other side, the con...

Embodiment 3

[0070] Below, refer to Figure 7 , the mounting structure of the metal diaphragm damper according to the third embodiment will be described. In addition, the same reference numerals are assigned to the same components as the components shown in the above-mentioned embodiments, and overlapping descriptions are omitted.

[0071] Such as Figure 7 As shown in (a), in the metal diaphragm damper 100 of the third embodiment, a plurality of circular through-holes 211b in a planar view penetrating through the respective outer peripheral portions 211 of the diaphragms 102a, 102b in the plate thickness direction are separately formed in the circumferential direction. . Such as Figure 7 As shown in (b), through the through holes 211b, the metal diaphragm damper 100 is arranged in the fuel chamber 11 in the state where the metal diaphragm damper 100 is installed between the case 16 and the case cover 17, and through the through holes 211b, it is possible to The fuel is moved to one s...

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Abstract

Provided is a structure for attaching a metal diaphragm damper that can exert a high pulsation reduction function with a simple structure. A structure for attaching a metal diaphragm damper (1), in which gas is encapsulated in an interior part (S3) by a welding part W at which outer diameter sides of two disc-shaped diaphragms (2a, 2b) are welded together in a ring shape, to a space 11 formed between a housing (16) and a housing cover (17), wherein the diaphragms (2a, 2b) have outer peripheral parts (21, 21) on an outer diameter side of the welding part W, and the outer peripheral parts (21, 21) of the two diaphragms (2a and 2b) are sandwiched in a plate thickness direction of the diaphragms (2a, 2b) by the housing (16) and the housing cover (17).

Description

technical field [0001] The present invention relates to a mounting structure of a vibration-absorbing metal diaphragm damper used in a place where vibration occurs, such as a high-pressure fuel pump. Background technique [0002] There is a high-pressure fuel pump that pressurizes fuel supplied from a fuel tank to the injector side. The high-pressure fuel pump pressurizes and discharges fuel by reciprocating a plunger driven by the rotation of a camshaft of the internal combustion engine. For such a high-pressure fuel pump, a change in the amount of fuel discharged from the high-pressure fuel pump to the injector or a change in the injection amount of the injector will cause vibration in the fuel chamber, so in general, a built-in reduction in the fuel Metal diaphragm shock absorbers for vibrations generated by the cavity. [0003] For example, in the metal diaphragm damper disclosed in Patent Document 1, two disk-shaped diaphragms are welded to the outer diameter edge to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M55/00F02M55/02F02M59/44
CPCF02M55/04F02M59/445F02M59/48F02M2200/315F02M2200/8084F02M59/44F02M59/36F02M55/025F02M2200/90
Inventor 岩俊昭小川義博佐藤裕亮
Owner EAGLE INDS