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Splitting design method for absorber recovery sandwich plate valve sheet

A shock absorber and recovery valve technology, applied in the field of hydraulic shock absorbers, can solve the problem of not giving an accurate and reliable splitting design method, lacking the equivalent thickness of superimposed valve plates and analytical calculation formulas of stress intensity, and difficult to meet the requirements of reducing the pressure at the same time. The design requirements of the damping characteristics of the vibrator superimposed on the stress intensity of the valve plate, etc.

Inactive Publication Date: 2014-09-03
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The design value of the thickness of the annular valve plate of the shock absorber is the design value of the thickness of the single valve plate. In order to meet the requirements of different damping characteristics, stress intensity, production process and production cost of the shock absorber, most shock absorbers use stacked valve plates. However, due to the lack of analytical calculation formulas for the equivalent thickness and stress intensity of the superimposed valve plate, no accurate and reliable split design method has been given at home and abroad for the split design of the shock absorber superimposed valve, and most of them use "experience + repeated Test" method, through repeated tests and modifications on the superimposed valve plate of the shock absorber, finally determine the thickness and number of superimposed valve plates of a certain shock absorber
Therefore, the traditional design method is difficult to design the accurate and reliable thickness and number of superimposed valve plates, and it is difficult to meet the design requirements of the shock absorber on the damping characteristics and the stress intensity of the superimposed valve plates at the same time.

Method used

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  • Splitting design method for absorber recovery sandwich plate valve sheet
  • Splitting design method for absorber recovery sandwich plate valve sheet
  • Splitting design method for absorber recovery sandwich plate valve sheet

Examples

Experimental program
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Effect test

Embodiment 1

[0070] Example 1: The structure of a shock absorber piston assembly and recovery valve is as follows figure 2 As shown, the piston body 1, the piston rod 2, the piston hole 3, the recovery valve plate 4, the limit retaining ring 5, the fastening nut 6, the normally open orifice 7, wherein, the angle for the piston hole 3 is θ, and the section Radius r of the inner circle of the valve plate 4 a , outer circle radius r b , the valve port radius is r k ; The oil circuit when the valve is opened at the maximum recovery stroke is as follows: image 3 Shown; the speed characteristic curve required by the shock absorber design is as follows Figure 4 Shown; restore the superimposed valve mechanical model as Figure 5 shown. Shock absorber piston rod diameter d g =20mm, inner diameter of piston cylinder D h =28mm; maximum valve opening speed V of shock absorber recovery stroke k2 =1.0m / s, the required maximum valve opening damping force F dk2 =1650N; Piston average clearance...

Embodiment 2

[0124] Embodiment 2: The structural parameters and oil parameters of a certain shock absorber are the same as those in Embodiment 1, except that the maximum valve opening speed point V of the shock absorber is k2 =1.20m / s, the damping force of restoring valve opening is F dk2 =2000N, the design thickness of the recovery valve plate h=0.30046mm, the area A of the normally open orifice of the recovery valve 0 =0.8mm 2 , usually the width of the through hole b A0 =2.0mm, the number is n A0 =4.

[0125] Adopt the design steps of embodiment one, namely:

[0126] (1) Determine the maximum pressure p on the recovery valve plate when the shock absorber is at its maximum valve opening fk2 :

[0127] Step A: Determine the piston gap throttling pressure p at the maximum valve opening of the shock absorber Hk2 and flow Q Hk2 :

[0128] According to the maximum valve opening speed V k2 =1.2m / s point corresponds to the required shock absorber damping force F dk2 =1650N, inner dia...

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Abstract

The invention relates to a splitting design method for an absorber recovery sandwich plate valve sheet, and belongs to the technical field of absorbers. The splitting design method for the absorber recovery sandwich plate valve sheet is characterized in that the adopted steps are as follows: 1) the maximum pressure of a recovery valve sheet born when a valve of the absorber is opened to the maximum degree; 2) the maximum stress of an absorber single sheet designed thickness recovery valve sheet is calculated; 3) the maximum allowable thickness of the recovery sandwich plate valve sheet is confirmed; 4) splitting design of the absorber recovery sandwich plate valve sheet is carried out; 5) equivalent thickness of the sandwich plate valve sheet is checked. By means of the splitting design method for the absorber recovery sandwich plate valve sheet, the designed thickness of an original single sheet recovery valve sheet can be split and designed to the sandwich plate valve sheet which is composed of thickness of standard series. The thickness and the sheet number meet design requirements of damping force characteristics of an absorber, and design requirements of stress intensity of the recovery sandwich plate valve sheet are met. By means of the splitting design method for the absorber recovery sandwich plate valve sheet, the accurate and reliable absorber recovery sandwich plate valve sheet can be designed and obtained. The rate of development of the absorber is accelerated, and cost for design and experiment of the absorber is reduced.

Description

technical field [0001] The invention relates to a hydraulic shock absorber, in particular to a method for splitting and designing a stacked valve plate of a shock absorber restoration valve. Background technique [0002] The design value of the thickness of the annular valve plate of the shock absorber is the design value of the thickness of the single valve plate. In order to meet the requirements of different damping characteristics, stress intensity, production process and production cost of the shock absorber, most shock absorbers use stacked valve plates. However, due to the lack of analytical calculation formulas for the equivalent thickness and stress intensity of the superimposed valve plate, no accurate and reliable split design method has been given at home and abroad for the split design of the shock absorber superimposed valve, and most of them use "experience + repeated "Test" method, through repeated tests and modifications on the superimposed valve plate of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F9/34G06F17/50
Inventor 周长城孔艳玲曹海琳
Owner SHANDONG UNIV OF TECH
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