Method for calculating radial stress of annular superposed valve slices of shock absorber under nonuniform pressure

A technology of non-uniform pressure distribution and radial stress, which is applied in the field of hydraulic shock absorbers, can solve the problems of not being able to provide analytical calculation formulas and calculation methods, and not being able to meet the requirements of shock absorber split design and strength check.

Inactive Publication Date: 2013-09-11
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pressure on the superimposed valve plate of the shock absorber is non-uniform. For the calculation of the radial stress of the annular superimposed valve plate of the shock absorber under the non-uniform pressure, no accurate calculation method has been given before at home and abroad. At present, most of them use finite element simulation software to carry out numerical simulation calculations for superimposed valve plates under a given pressure by establishing a solid model. Different numerical values ​​obtained by different grid divisions are different to obtain different numerical solutions, and accurate analysis cannot be provided. Calculation formula and calculation method, therefore, can not meet the requirements of the modern CAD of the shock absorber and the actual split design and strength check of the superimposed valve plate

Method used

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  • Method for calculating radial stress of annular superposed valve slices of shock absorber under nonuniform pressure
  • Method for calculating radial stress of annular superposed valve slices of shock absorber under nonuniform pressure
  • Method for calculating radial stress of annular superposed valve slices of shock absorber under nonuniform pressure

Examples

Experimental program
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Effect test

Embodiment 1

[0083] Embodiment one: The radius of the inner circle of a shock absorber annular superimposed valve plate r a =5.0mm, outer circle radius r b =8.5mm, valve port radius =8.0mm, modulus of elasticity E =200GPa, Poisson's ratio mu =0.3, the thickness and number of annular superimposed valve slices are respectively h 1 =0.1mm, n 1 =3; h 2 =0.15mm, n 2 =2; h 3 =0.2mm, n 3 =1, maximum non-uniform pressure p 0 =3.0MPa, in the interval [ r a , r k ] of distribution pressure p 0 =3.0MPa, in the interval [ r k , r b ] of distribution pressure p = MPa. The radial stress of the annular stacked valve plate of the shock absorber under non-uniform pressure is calculated.

[0084] The calculation method of the radial stress under the non-uniform pressure of the annular superimposed valve plate of the shock absorber provided by the example of the present invention, its calculation process is as follows image 3 As shown, the specific calculation steps are ...

Embodiment 2

[0150] Embodiment two: The inner circle radius, outer circle radius and valve material characteristics of the superimposed valve plate of a shock absorber valve plate are exactly the same as those of the first embodiment, and the thickness and number of the superimposed valve plate are respectively h 1 =0.1mm, n 1 =1; h 2 =0.15mm, n 2 =1; h 3 =0.2mm, n 3 =1, the highest non-uniform pressure p =3.0MPa, valve port radius r k =7.0mm, in the interval [ r a , r k ] of distribution pressure p = p 0 =3.0MPa, in the interval [ r k , r b ] of distribution pressure p = MPa. The radial stress of the annular stacked valve plate of the shock absorber under non-uniform pressure is calculated.

[0151] The calculation steps of Embodiment 1 are adopted, namely:

[0152] (1) Determine the equivalent thickness of the annular superimposed valve plate h e :

[0153] According to the thickness and number of annular superimposed valve slices h 1 =0.1mm, n 1 =1;...

Embodiment 3

[0208] Embodiment three: The material characteristic parameters, inner circle radius and valve position radius of a shock absorber annular superimposed valve plate are the same as those in Example 1, and the outer circle radius r b =8.75mm, the thickness and number of superimposed valve plates are respectively h 1 =0.15mm, n 1 =1; h 2 =0.2mm, n 2 =3, the maximum non-uniform pressure p 0 =3.0MPa. The radial stress of the annular stacked valve plate of the shock absorber under non-uniform pressure is calculated.

[0209] The calculation steps of Embodiment 1 are adopted, namely:

[0210] (1) Determine the equivalent thickness of the annular superimposed valve plate h e :

[0211] According to the thickness and number of stacked valve plates h 1 =0.15mm, n 1 =1; h 2 =0.20mm, n 2 =3, to determine the equivalent thickness of the annular superimposed valve h e for:

[0212] = 0.30138mm;

[0213] (2) Determine the thickness proportional coefficient of t...

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Abstract

The invention relates to a method for calculating radial stress of annular superposed valve slices of a shock absorber under nonuniform pressure and belongs to the technical field of shock absorbers. The method is characterized by including firstly, according to thickness and number of the annular superposed valve slices, calculating a thickness proportion coefficient of each superposed valve slice; secondly, according to structure and material characteristic parameters and radius of a valve port position, acquiring a radial stress coefficient of a ring under the nonuniform pressure; thirdly, according to the thickness proportion coefficients, the radial stress coefficient and a maximum nonuniform pressure, calculating radial stress of the annular superposed valve slices of the shock absorber at any radius position. Calculation examples and ANSYS simulation verification results show that the calculation method is correct, so that an accurate method for calculating radial stress of the annular superposed valve slices of the shock absorber is provided for designing and strength verifying of the shock absorber and the superposed valve slices, valve slice parameter design values are more reliable, designing and testing expenses can be reduced, design level, performance and quality of the shock absorber can be improved, and the service life of the shock absorber can be prolonged.

Description

technical field [0001] The invention relates to hydraulic shock absorber technology, in particular to a calculation method for the radial stress of the annular superimposed valve plate of the shock absorber under non-uniform pressure. Background technique [0002] Shock absorber throttle valve plates are mostly annular superimposed valve plates, which are the most critical precision components in automobile shock absorbers, and their thickness is generally only 0.15mm~0.3mm. The stress of annular superimposed valve plates affects the thickness of shock absorber superimposed valve plates Split design and strength check. At the same time, the stress of the valve plate determines the life of the shock absorber. Among them, the radial stress will cause the inner circle of the valve plate to break. However, the pressure on the superimposed valve plate of the shock absorber is non-uniform. For the calculation of the radial stress of the annular superimposed valve plate of the sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 周长城宋群华珍
Owner SHANDONG UNIV OF TECH
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