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Intensity checking method of overlaying valve plates of compression valve of vehicle buffer

A technology of strength check and superimposed valve, which is applied in the field of hydraulic shock absorbers, can solve the problems of inability to meet shock absorbers, lack of analytical calculation formulas and methods, etc.

Inactive Publication Date: 2013-06-19
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The maximum stress of the superimposed valve plate of the shock absorber compression valve determines the service life of the shock absorber, but because the oil circuit of the compression stroke is more complicated than that of the recovery stroke, it is not only affected by the structure of the compression valve seat assembly and the compression valve, but also by the piston. The impact of the gap and the normal through hole of the recovery valve; at the same time, because the actual pressure on the superimposed valve plate of the shock absorber is non-uniform, the throttling loss of the oil is nonlinear. The calculation of the maximum stress of the valve plate and the strength check have not been given a reliable calculation method that can satisfy the design and strength check of the shock absorber and the superimposed valve plate. Numerical simulation of stress under constant pressure cannot meet the requirements of modern CAD design of shock absorbers due to the lack of analytical calculation formulas and methods

Method used

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  • Intensity checking method of overlaying valve plates of compression valve of vehicle buffer
  • Intensity checking method of overlaying valve plates of compression valve of vehicle buffer
  • Intensity checking method of overlaying valve plates of compression valve of vehicle buffer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Embodiment one : The structure of a shock absorber compression valve seat assembly and compression valve is as follows figure 2 As shown, compensation valve spring 1, compensation valve plate 2, compression valve seat hole 3, compression valve fastening rivet 4, compression valve superimposed valve plate 5, compression valve clearance limit ring 6; compression valve body 7, compression valve limit Bit gap gasket 8, compensation valve oil passage 9, compensation valve spring seat 10, wherein, due to the normally open orifice of the compression valve superimposed valve plate 7 and the annular throttle gap when the valve is opened at the maximum, the compression valve superimposed valve plate bears The pressure is non-uniform, such as image 3 shown. The structural parameters, valve body structure and oil parameters of the shock absorber are as follows: piston cylinder inner diameter , piston rod diameter d g =20mm, the annular area between the piston cylinder and ...

Embodiment 2

[0146] Embodiment 2 : certain shock absorber except that the compression valve seat hole is different from the embodiment one, other structural parameters and oil parameters are all the same as the embodiment one, wherein the diameter of the compression valve seat hole d hy =2.0mm, number n hy =6; the thickness and the number of compression superimposed valve slices are h 1 =0.10mm, n 1 =2; h 2 =0.15mm, n 2 =2; Maximum valve opening speed required by shock absorber design V k2y =1.0m / s, the maximum valve opening damping force F dk2y =700N.

[0147] Using the calculation steps of Embodiment 1, the strength of the stacked valve plate of the shock absorber compression valve is checked, namely:

[0148] (1) Determine the equivalent thickness of the superimposed valve plate of the shock absorber compression valve h e And the maximum thickness ratio factor:

[0149] According to the thickness and number of stacked valve slices of the compression valve, h 1 =0.10...

Embodiment 3

[0171] Embodiment 3 : The structural parameters, oil parameters and valve opening damping characteristic requirements of a certain shock absorber are the same as those of Embodiment 2, but the structure of the compression valve plate is different from that of Embodiment 2, and the inner circle radius of the compression valve plate r ay =4.0mm, outer circle radius r by =8.0mm, valve port radius r ky =6.5mm.

[0172] Using the calculation steps of Embodiment 2, the strength of the stacked valve plate of the shock absorber compression valve is checked, namely:

[0173] (1) Determine the equivalent thickness of the superimposed valve plate of the shock absorber compression valve h e And the maximum thickness ratio factor:

[0174] According to the thickness and the number of stacked valve plates of the compression valve are the same as those of the second embodiment, therefore, the equivalent thickness And maximum thickness proportional coefficient is also identical wit...

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Abstract

The invention relates to an intensity checking method of overlaying valve plates of a compression valve of a vehicle buffer, and belongs to the technical field of hydraulic buffers. At present, a reliable calculation method for checking the maximum stress and intensity of the overlaying valve plates of the compression valve is not given at home and aboard, the checking is conducted through numerical simulation by finite element software most of the time, and therefore modern design requirements of the buffers can not be satisfied. The intensity checking method is characterized in that checking of the intensity of the overlaying valve plates of the compression valve is conducted according to the thicknesses, the number of pieces, the allowable stress and the maximum stress of the overlaying valve plates of the compression valve. According to the intensity checking method, not only influences of normal open holes of a rebuilt valve, piston gaps and a circulation valve are considered, but also the stress condition of actual non uniform pressure is considered. The intensity checking method of the overlaying valve plates of the compression valve of the vehicle buffer is capable of calculating the maximum stress of the overlaying valve plates of the compression valve accurately, checking the intensity reliably, guaranteeing the design service life of the buffer, reducing maintenance cost, avoiding repeated testing and modification, reducing the cost of designing and testing, and shortening the development cycle.

Description

technical field [0001] The invention relates to a hydraulic shock absorber, in particular to a method for checking the strength of a superimposed valve plate of a compression valve of an automobile shock absorber. Background technique [0002] The maximum stress of the superimposed valve plate of the shock absorber compression valve determines the service life of the shock absorber, but because the oil circuit of the compression stroke is more complicated than that of the recovery stroke, it is not only affected by the structure of the compression valve seat assembly and the compression valve, but also by the piston. The impact of the gap and the normal through hole of the recovery valve; at the same time, because the actual pressure on the superimposed valve plate of the shock absorber is non-uniform, the throttling loss of the oil is nonlinear. The calculation of the maximum stress of the valve plate and the strength check have not been given a reliable calculation method ...

Claims

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Application Information

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IPC IPC(8): F16F9/34
Inventor 周长城肖红华珍
Owner SHANDONG UNIV OF TECH
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