Split design method for non-equivalent structural superposed valve plate of rebound valve of shock absorber
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A design method and shock absorber technology, applied in the direction of shock absorbers, shock absorbers, springs/shock absorbers, etc., can solve the problems of difficult design to obtain accurate and reliable non-equi-structured stacked valve plate thickness and number of plates.
Inactive Publication Date: 2014-04-02
SHANDONG UNIV OF TECH
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Problems solved by technology
However, due to the lack of analytical calculation formulas for the equivalent thickness and stress intensity of non-isostructural superimposed valve plates, there has not been an accurate and reliable split design method for the non-isostructural superimposed valve split design at home and abroad. Most of them use the method of "experience + trial and error", that is, through repeated tests and modifications of the damper characteristics of superimposed valve plates with different thicknesses and outer radii, and finally determine the thickness and thickness of the non-isomorphic superimposed valve plate of a certain shock absorber. number
Therefore, the traditional design method is difficult to design accurate and reliable non-isomorphic superimposed valve plate thickness and the number of plates
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Embodiment 1
[0078] Example 1: The structure diagram of a shock absorber piston assembly and recovery valve is as follows figure 2 As shown, among them, 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, and the normally open orifice 7. The speed characteristic curve required by the shock absorber design is as follows Figure 5 Shown, the return stroke maximum valve opening speed =1.0m / s, the required maximum valve opening damping force F dk2 =1650N; piston rod diameter d g =20mm, inner diameter of piston cylinder D h =28mm; Piston average clearance , piston gap length, Eccentricity =1.0; oil density , kinematic viscosity = m 2 / s, dynamic viscosity ;Physical length of the piston bore =9.0mm, the angle is 52°, piston bore diameter =2.0mm, number n h =4; the radius of the inner circle of the valve plate =5.5mm, outer circle radius =8.5mm, valve port radius ,Poisson's ratio ...
Embodiment 2
[0133] Embodiment 2: The structural parameters and oil parameters of a shock absorber are the same as those in Embodiment 1, except for the maximum valve opening speed point of the shock absorber V k2 =1.20m / s, the damping force of restoring valve opening is F dk2 =2000N, the speed characteristic curve required by the shock absorber design is as follows Figure 7 As shown, the design thickness of the restored valve plate h =0.30046mm, the area of the normally open orifice of the recovery valve A 0 =0.8mm 2 , usually the width of the through hole b A0 =2.0mm, the number is n A0 =4.
[0134] The calculation steps of Embodiment 1 are adopted, namely:
[0135] (1) Determine the maximum pressure on the recovery valve plate when the shock absorber is at its maximum opening :
[0136] Step A: Determine the piston gap throttling pressure at the maximum valve opening of the shock absorber and traffic :
[0137] According to the maximum valve opening speed The poi...
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Abstract
The invention relates to a split design method for a non-equivalent structural superposed valve plate of a rebound valve of a shock absorber, and belongs to the technical field of shock absorbers. The method is characterized in that maximum allowable thickness of the non-equivalent structural superposed valve plate of the rebound valve of the shock absorber is determined according to structural parameters of a shock absorber, oil-liquid parameters, valve plate parameters, material performance parameters and maximum open valve damping characteristics, and split design is performed on the non-equivalent structural superposed valve plate of the rebound valve of the shock absorber according to original single-plate design thickness h, a thickness standard series, a non-equivalent structural superposed valve plate equivalent thickness calculation formula. By equivalent thickness calculation verification and design shock absorber characteristic tests, results show that the design method is accurate, and a reliable design method is provided for the non-equivalent structural superposed valve plate of the rebound valve. By the aid of the method, the accurate and reliable non-equivalent structural superposed valve plate of the rebound valve can be obtained, design and testing expenses are lowered, the requirements on damping characteristics of the shock absorber are met, stress state of the rebound valve plate is improved, and service life of the shock absorber is prolonged.
Description
technical field [0001] The invention relates to a shock absorber, in particular to a split design method for non-isostructural superimposed valve plates of a shock absorber recovery valve. Background technique [0002] The thickness of the annular valve plate of the shock absorber obtained by design is the design value of the thickness of a single valve plate, but in order to meet the requirements of different damping characteristics, stress intensity, production process and production cost of the shock absorber, non-isostructural stacked valves are often used The stacked valve slices, that is, the stacked valve slices have the same inner circle radius and different outer circle radii; the use of non-isostructural stacked valve slices with reasonable design can improve the stress state of the valve slices and increase the service life of the shock absorber, and at the same time The "gap limit washer" can also be avoided, so it has good economic and social benefits. However,...
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