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Computing method for combined stress of same-structure annular superposed valve sheets of shock absorber

A technology of composite stress and superimposed valves, which is applied in the field of hydraulic shock absorbers, can solve the problems that analytical calculation formulas or calculation methods cannot be provided, and it is difficult to meet the requirements of superimposed valve plates of shock absorbers.

Inactive Publication Date: 2013-07-10
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the calculation of the composite stress of the iso-annular superimposed valve plate of the shock absorber, there is no simple and accurate calculation method at home and abroad. The composite stress of the superimposed valve plate is numerically simulated, but the finite element simulation software cannot provide a simple, accurate and reliable analytical calculation formula or calculation method, which is difficult to meet the actual design and production of the shock absorber superimposed valve plate and the requirements of modern CAD design

Method used

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  • Computing method for combined stress of same-structure annular superposed valve sheets of shock absorber
  • Computing method for combined stress of same-structure annular superposed valve sheets of shock absorber
  • Computing method for combined stress of same-structure annular superposed valve sheets of shock absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment one: The radius of the inner circle of a shock absorber with an isostructured 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 superimposed valve plates are respectively h 1 =0.1mm, n 1 =3; h 2 =0.15mm, n 2 =2; h 3 =0.2mm, n 3 =1, uniform pressure p =3.0MPa.

[0038] (1) Determine the equivalent thickness of the isomorphic annular superimposed valve plate h e :

[0039] According to the thickness and number of the annular superimposed valve plates of the shock absorber h 1 =0.1mm, n 1 =3; h 2 =0.15mm, n 2 =2; h 3 =0.2mm, n 3 =1, the equivalent thickness of the isomorphic annular superimposed valve plate h e for:

[0040] =0.260855mm;

[0041] (2) Determine the thickness proportional coefficient of the isomorphic annular superimposed valve plate k hi :

[0042] According to...

Embodiment 2

[0063] Embodiment two: The structural parameters and material characteristic parameters of a shock absorber isomorphic annular superimposed valve plate are exactly the same as those in Example 1, and the thickness and number of superimposed valve plates are respectively h 1 =0.1mm, n 1 =1; h 2 =0.15mm, n 2 =1; h 3 =0.2mm, n 3 =1, pressure p =3.0MPa.

[0064] (1) Determine the equivalent thickness of the shock absorber isomorphic annular superimposed valve plate h e :

[0065] According to the thickness and number of stacked valve plates h 1 =0.1mm, n 1 =1; h 2 =0.15mm, n 2 =1; h 3 =0.2mm, n 3 =1, to determine the equivalent thickness of the shock absorber isomorphic annular superimposed valve plate h e for:

[0066] = 0.231303mm;

[0067] (2) Determine the thickness proportional coefficient of each superimposed valve plate:

[0068] According to the thickness of the isomorphic ring superimposed valve plate h1 =0.1mm, h 2 =0.15mm, h...

Embodiment 3

[0078] Embodiment three: The material characteristic parameters of a shock absorber isostructured annular superimposed valve plate are the same as those in Example 1, and the radius of the inner circle is =5.0mm, outer circle radius =8.75mm, valve port radius =8.0mm, the thickness and number of superimposed valve plates are respectively h 1 =0.15mm, n 1 =1; h 2 =0.2mm, n 2 =3, uniform pressure p =3.0MPa.

[0079] Adopt exactly the same steps as Example 1, namely:

[0080] (1) Determine the equivalent thickness of the isomorphic annular superimposed valve plate h e :

[0081] 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 isomorphic annular superimposed valve plate h e for:

[0082] = 0.30138mm;

[0083] (2) Determine the thickness proportional coefficient of each superimposed valve plate:

[0084] According to the thickness of the isomorphic ri...

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Abstract

The invention relates to a computing method for combined stress of same-structure annular superposed valve sheets of a shock absorber, and belongs to the technical field of hydraulic shock absorbers. The computing method is characterized by comprising the following steps: (1) confirming the equivalent thickness of the same-structure annular superposed valve sheets; (2) confirming the thickness proportionality factor of the same-structure annular superposed valve sheets; (3) computing the combined stress factor at any radius r of the same-structure annular superposed valve sheets; and (4) computing the combined valve sheet stress at any radius r of the superposed valve sheets and the maximum combined stress at the inner circle radius. With adoption of the computing method, the combined stress at any radius can be accurately computed according to the thickness and the number of the same-structure annular superposed valve sheets as well as the stress borne by the same-structure annular superposed valve sheets. As proved by ANSYS simulation verification results, the computing method for the combined stress of the same-structure annular superposed valve sheets is accurate, and the reliable computing method for the combined stress of the same-structure annular superposed valve sheets is provided for splitting design and stress intensity check of superposed valve sheets actually.

Description

technical field [0001] The invention relates to a hydraulic shock absorber, in particular to a method for calculating the compound stress of the annular superimposed valve plate of the shock absorber. Background technique [0002] In fact, most of the shock absorber throttle valves use multiple superimposed valves with the same material properties and equal inner and outer radii, that is, isomorphic annular superimposed valves, and their thicknesses can be equal or unequal. , but most of them use standard thickness series, that is, h 1 , h 2 ,..., h n To meet the different characteristics of the shock absorber, reduce the production cost and the process and the composite stress of the valve plate. The composite stress of the throttle valve plate of the shock absorber directly affects the life of the throttle valve plate of the shock absorber. In order to reduce the stress of the valve plate and improve the service life, most of the shock absorber valve plates use stack...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 周长城提艳宋群
Owner SHANDONG UNIV OF TECH
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