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Computing method for circumferential stress of equivalent structure circular sandwich valve plate of absorber

A technology of circumferential stress and superimposed valves, which is applied in the field of hydraulic shock absorbers, can solve problems such as the lack of analytical calculation formulas or calculation methods, and the difficulty in meeting the design and production requirements of shock absorber superimposed valve plates.

Inactive Publication Date: 2013-06-26
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 circumferential stress of the iso-structured annular superimposed valve plate of the shock absorber, there is no simple and accurate calculation method at home and abroad. The circumferential utilization of the superimposed valve plate is used for numerical simulation calculations, but due to the lack of simple, accurate and reliable analytical calculation formulas or calculation methods in the finite element simulation software, it is difficult to meet the design and production requirements of the actual shock absorber superimposed valve plate

Method used

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  • Computing method for circumferential stress of equivalent structure circular sandwich valve plate of absorber
  • Computing method for circumferential stress of equivalent structure circular sandwich valve plate of absorber
  • Computing method for circumferential stress of equivalent structure circular sandwich valve plate of absorber

Examples

Experimental program
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Embodiment 1

[0038] Embodiment one: The radius of the inner circle of a shock absorber with an isostructured annular superimposed valve plate ra =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.

[0039] (1) Determine the equivalent thickness of the isomorphic annular superimposed valve plate h e :

[0040] According to the thickness and the number of circular superimposed valve plates of a certain 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:

[0041] =0.260855mm;

[0042] (2) Determine the thickness proportional coefficient of the isomorphic annular superimposed valve plate k hi

[0043] Accordin...

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) 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:

[0065] = 0.231303mm;

[0066] (2) According to the thickness of the isomorphic annular superimposed valve plate h 1 =0.1mm, h 2 =0.15mm, h 3 =0.2mm, and the equivalent thickness in step (1) h e =0.231303mm, determine the thickness proportional coefficients of each superimposed valve plate as:

[0067] k h 1 = 0.43233, = 0.6485, = 0....

Embodiment 3

[0075] Embodiment three: The material characteristic parameters and inner circle radius of a shock absorber isomorphic annular superimposed valve plate are the same as those in Example 1, and the outer circle radius =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 pressure is evenly distributed p =3.0MPa.

[0076] Adopt exactly the same steps as Example 1, namely:

[0077] (1) 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:

[0078] = 0.30138mm;

[0079] (2) According to the thickness of the isomorphic annular superimposed valve plate h 1 =0.15mm, h 2 =0.2mm, and the equivalent thickness in step (1) h e =0.30138mm, determine the thickness proportional coefficients of each superimposed valve plate as:

[0080] k h 1 ...

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Abstract

The invention relates to a computing method for circumferential stress of an equivalent structure circular sandwich valve plate of an absorber, and belongs to the absorber technical field. A reliable computing method for the circumferential stress of the equivalent structure circular sandwich valve plate of the absorber does not exist previously, and therefore the requirements of absorber modernized computer aided design (CAD) design and stress intensity calculation can not be met. The computing method for circumferential stress of the equivalent structure circular sandwich valve plate of the absorber comprises the following steps: (1), ensuring equivalent thickness of the equivalent structure circular sandwich valve plate; (2), ensuring thickness proportionality coefficient of the equivalent structure circular sandwich valve plate; (3), calculating circumferential stress coefficient of the equivalent structure circular sandwich valve plate on any radius r; and (4), calculating circumferential stress and maximum circumferential stress of the equivalent structure circular sandwich valve plate on any radius r. The computing method for circumferential stress of the equivalent structure circular sandwich valve plate of the absorber can accurately calculate the circumferential stress and the maximum circumferential stress of the equivalent structure circular sandwich valve plate on any radius position, and provides a reliable computing method for circumferential stress for absorber equivalent structure sandwich valve plate designs and stress intensity calculation.

Description

technical field [0001] The invention relates to a hydraulic shock absorber, in particular to a method for calculating the circumferential stress of an annular superimposed valve plate of the shock absorber. Background technique [0002] In fact, most of the throttle valve plates of the shock absorber are stacked with multiple plates with the same material properties and equal inner and outer radii, that is, isomorphic annular stacked valve plates. Most of the stacked valve plates adopt standard thickness series, namely h 1 , h 2 ,..., h n To meet the different characteristics of the shock absorber, reduce the manufacturing cost, the stress intensity of the valve plate and the production process requirements. The superimposed throttle valve plate is the most critical precision core component of the shock absorber. The deformation of the superimposed valve plate affects the damping characteristics of the shock absorber. The stress of the superimposed valve plate determine...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 周长城刘小亭提艳
Owner SHANDONG UNIV OF TECH
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