Method for designing area of hydraulic shock absorber rebuilt valve normal through hole based on speed characteristics

Abstract

The invention relates to a method for designing the area of a hydraulic shock absorber rebuilt valve normal through hole based on speed characteristics, and belongs to the technical field of hydraulic shock absorbers. The method is characterized by comprising the following steps of 1) determining the design speed point of the area of the normal through hole and the damping force of a shock absorber, 2) determining the throttle pressure and the flow of the piston clearance of the shock absorber, 3) determining the flow of a piston hole; 4) determining the equivalent length of the piston hole, 5) determining the throttle pressure of the piston hole and 6) designing the area of the shock absorber rebuilt valve normal through hole, actual broadband and the actual number. The method can accurately design the area of the rebuilt valve normal through hole according to the design requirements for the hydraulic shock absorber characteristics, shock absorber structure parameters and a rebuilt stroke oil path. According to the method, the accurate and reliable design value of the area of the shock absorber rebuilt valve normal through hole can be obtained, repeated testing and modification are avoided, cost for designing and testing the shock absorber is lowered, and a development period is shortened.

Description

technical field [0001] The invention relates to a cylinder-type hydraulic shock absorber, in particular to a design method for the normal through hole area of ​​a hydraulic shock absorber recovery valve based on speed characteristics. Background technique [0002] The damping characteristics of the hydraulic shock absorber are mainly determined by the parameters of the shock absorber recovery valve and compression valve (normal hole area, valve plate thickness, pre-deformation and maximum limit clearance). Among them, the size of the normal through hole not only affects the damping characteristics of the shock absorber, but also affects the design of parameters such as the thickness of the shock absorber valve plate and the amount of pre-deformation. Due to the nonlinearity between the design value of the normal through hole area of ​​the shock absorber and the design speed point, that is, different design speed points are used to obtain different design values ​​of the norm...

AI Technical Summary

Problems solved by technology

Since the design value of the area of ​​the normal through hole of the shock absorber is nonlinear with the design speed point, that is, different design speed points are used to obtain different design values ​​of the area of ​​the normal through hole. At the same time, the area design of the normal through hole of the shock absorber is also affected by The influence of local throttling loss. At present, there is no accurate and reliable design method for the parameter design of the valve system of the cylinder hydraulic shock absorber in foreign countries. method, and finally obtain the design value of the area of ​​the normal through hole of the shock absorber. Therefore, the design and test costs are high, the development cycle is long, and it is difficult to meet the requirements of the rapid development of the automotive industry.

Chinese scholars have done a lot of research on this. For example, Professor Zhou Changcheng of Shandong University of Technology once established a curve fitting optimization design method, which can obtain the optimal design speed point of the shock absorber and the optimal design value of the normal through-hole area, and the characteristics of the shock absorber. The experimental value is close to the characteristic value required by the design, but because the curve fitting optimal design method needs to establish the optimal design objective function, and needs programming for optimal design and calculation, it is difficult for the shock absorber engineering designer to master

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