Design method of vehicle damper compression valve limiting checking ring curved surface shape

A limit retaining ring and design method technology, applied in the field of hydraulic shock absorbers, can solve problems such as complex oil circuit, difficulty in meeting the maximum valve opening speed characteristics of the shock absorber, and inability to guarantee the stress strength design requirements of the compression valve plate, etc.

Inactive Publication Date: 2013-06-05
SHANDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the constraints of the deformation of the shock absorber valve plate and the non-linear throttling loss of the oil, and 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 Affected by the piston gap and the area of ​​the normal through hole, there is no accurate and reliable design method for the surface shape of the stop ring of the compression valve of the hydraulic shock absorber at home and abroad, and some of them are directly replaced by ordinary gaskets. , it is difficult to meet the requirements of the maximum valve opening speed characteristics of the shock absorber, and it is impossible to guarantee the stress intensity design requirements of the compression valve plate at the maximum valve opening

Method used

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  • Design method of vehicle damper compression valve limiting checking ring curved surface shape
  • Design method of vehicle damper compression valve limiting checking ring curved surface shape
  • Design method of vehicle damper compression valve limiting checking ring curved surface shape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Example 1: 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 plate 5, compression valve gap limit ring 6; compression valve body 7, compression valve limit gap Gasket 8, compensation valve oil passage 9, compensation valve spring seat 10, wherein, the surface of the compression valve stop ring 6 is a certain curved surface, 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 the piston rod ;piston gap length ;Piston average clearance ; eccentricity ; Oil kinematic viscosity viscosity = m 2 / s, density ,dynamic viscosity ;Diameter of the compression val...

Embodiment 2

[0134] Embodiment 2: Except that the compression valve seat hole of a certain shock absorber is different from Embodiment 1, other structural parameters and oil parameters are the same as Embodiment 1. Among them, 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; the speed characteristics required by the design of the shock absorber, such as Figure 9 Shown, among them, the initial valve opening speed of the compression stroke V k1y =0.10m / s, initial valve opening damping force F dk1y =180N, maximum valve opening speed V k2y =1.0m / s, the maximum valve opening damping force Fdk2y =700N.

[0135] Using the design steps of Embodiment 1, the curved surface shape of the stop ring of the shock absorber compression valve is designed, namely:

[0136] (1) Determine the equivalent thickness of the superimposed valve plate of th...

Embodiment 3

[0164] Embodiment 3: The structural parameters, oil parameters, and valve opening damping characteristics of a shock absorber are the same as those in Embodiment 2, except that the structure of the compression valve plate is different from that of Embodiment 2. The radius of the inner circle of the compression valve plate is r ay =4.0mm, outer circle radius r by =8.0mm, valve port radius r ky =6.5mm.

[0165] Using the design steps of Embodiment 2, the annular stacked valve plate of the shock absorber compression valve is designed, namely:

[0166] (1) Determine the equivalent thickness of the superimposed valve plate of the shock absorber compression valve h e :

[0167] 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 Also identical with embodiment two, namely:

[0168] =0.2061mm;

[0169] (2) Compression valve plate at any radius r Defo...

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Abstract

The invention relates to a design method of a vehicle damper compression valve limiting checking ring curved surface shape and belongs to the technical filed of hydraulic dampers. At present, the design method of the vehicle damper compression valve limiting checking ring curved surface shape is not accurate and reliable at home and abroad. The design method of the vehicle damper compression valve limiting checking ring curved surface shape is characterized in that a curved surface shape of a damper stacking compression valve limiting checking ring is designed according to the thicknesses and the number of compression valve stacking sheets, oil ways after primary opening of a valve and design demands of primary valve-opening speed characteristics and the largest valve-opening speed characteristics. An accurate curved surface shape design curves is provided. Accurate and reliable design values of the damper compression valve limiting checking ring curved surface shape are obtained by using the method. The largest valve-opening speed characteristics of damper compression travel are guaranteed. A stress condition is improved when the compression valve sheets is in the largest valve-opening. Service life of the bumper is prolonged. Meanwhile, repeated experiments, verification and modification are avoided. Expenses of designs and experiments of the bumper are reduced. Development period is shortened.

Description

technical field [0001] The invention relates to a hydraulic shock absorber, in particular to a method for designing the curved surface shape of a stop ring of a compression valve of an automobile shock absorber. Background technique [0002] In order to prevent the deformation and opening of the compression valve plate from increasing in the case of a large impact of the hydraulic shock absorber, resulting in breakdown and damage to the shock absorber, a limit retaining ring is usually installed under the compression valve plate. Among them, The curved surface shape of the limit stop ring has an important influence on the maximum valve opening damping characteristic of the hydraulic shock absorber compression stroke. The appropriate curved surface shape can not only meet the design requirements of the maximum valve opening damping characteristic of the shock absorber compression stroke, but also improve The shock absorber compresses the valve plate in a stressed state, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F9/34
Inventor 周长城李迪刘小亭
Owner SHANDONG UNIV OF TECH
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