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Calculation method for deformation of annular elastic valve plate of shock absorber

A calculation method and elastic valve technology, applied in the field of hydraulic shock absorbers, can solve the problem of inability to calculate the deformation of the valve plate, fail to provide an analytical formula for the valve plate, and fail to provide an annular elastic valve plate that meets the requirements of shock absorber design and characteristic simulation Deformation analytical calculation formula and calculation method and other issues

Inactive Publication Date: 2013-12-11
SHANDONG UNIV OF TECH
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AI Technical Summary

Problems solved by technology

However, previous domestic and foreign calculations for the deformation of the annular elastic valve plate of the shock absorber have not been able to provide accurate and reliable calculation methods. Simulation, although an approximate numerical solution can be obtained, it cannot provide an analytical calculation formula and calculation method for the deformation of the annular elastic valve plate that meets the requirements of shock absorber design and characteristic simulation
Although the "Mechanical Design Manual" provides the maximum deflection calculation formula, an approximate deflection coefficient can only be obtained from the manual based on the ratio of the inner and outer radii of the valve plate, and the approximate calculation of the maximum deflection of the valve plate cannot be performed. The amount of deformation at the radius position is calculated
Although many experts have used the perturbation theory to study the deformation calculation of the valve plate, they have not provided an analytical formula for calculating the deformation of the valve plate at any radial position.

Method used

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  • Calculation method for deformation of annular elastic valve plate of shock absorber
  • Calculation method for deformation of annular elastic valve plate of shock absorber
  • Calculation method for deformation of annular elastic valve plate of shock absorber

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Embodiment 1

[0033] Embodiment one: The thickness of a shock absorber valve plate h =0.3mm, inner circle radius =5.0mm, outer circle radius =8.5mm, valve port position radius r k =8.0mm, elastic modulus E =2.0 and Poisson's ratio mu =0.3, the uniform pressure is p =1.0MPa, p =2.0MPa and p =3.0MPa.

[0034] The calculation method of the deformation of the annular elastic valve plate of the shock absorber provided by the example of the present invention, the calculation process is as follows figure 1 As shown, the specific steps are as follows:

[0035] (1) Determine the constant term of the deformation coefficient of the valve plate E1 , E 2 , E 3 and E 4 :

[0036] According to the radius of the inner circle of the shock absorber valve plate =5.0mm, outer circle radius =8.5mm, elastic modulus E =2.0 and Poisson's ratio mu =0.3, to determine the constants of the deformation coefficient of the valve plate under uniform pressure, namely:

[0037] , ,

[...

Embodiment 2

[0054] Embodiment two: The thickness of the annular elastic valve plate of a shock absorber h =0.3mm, inner circle radius =5.0mm, outer circle radius =8.75mm, valve port position radius r k =8.0mm, elastic modulus E =2.0 and Poisson's ratio mu =0.3, the uniform pressure is p =1.0MPa, p =2.0MPa and p =3.0MPa.

[0055] Using the calculation steps of Embodiment 1, according to the radius of the inner circle of the shock absorber valve plate =5.0mm, outer circle radius =8.75mm, elastic modulus E =2.0 and Poisson's ratio mu =0.3, to determine the constants of the deformation coefficient of the valve plate under uniform pressure, namely:

[0056] , ,

[0057] ,

[0058] = ;

[0059] In the formula, , , , , , , , ;

[0060] Calculate the coefficient of deformation G r with radius r ( ) change curve, such as Figure 8 shown; when the pressure p =1.0MPa, p =2.0MPa and p =3.0MPa, respectively for the deformation of the shock a...

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Abstract

The invention relates to a calculation method for deformation of an annular elastic valve plate of a shock absorber. The calculation method is characterized in that the method comprises the steps of 1) determining constant terms formed by valve plate deformation coefficients; 2) calculating a valve plate deformation coefficient Gr at any position with radius r; and 3) calculating valve plate deformation fr at any position with radius r. The calculation method for the deformation of the annular elastic valve plate of the shock absorber provided by the invention uses a valve plate mechanical model under uniform pressure, gives out the deformation coefficient Gr at any position with radius r of the valve plate according to the inner radius, the outer radius, the elastic model and the Poisson ratio of the annular elastic valve plate, and can accurately calculate the deformation of any position with radius r of the valve plate by using the deformation coefficient of the position with radius r of the valve plate. By making a comparison with an ANSYS simulation verification result, the method is accurate and reliable and an accurate and reliable valve plate deformation calculation method is provided for the modern CAD (Computer-Aided Design) design and property simulation of the shock absorber.

Description

technical field [0001] The invention relates to a hydraulic shock absorber, in particular to a calculation method for the deformation of an annular elastic valve plate of the shock absorber. Background technique [0002] At present, there is no accurate and reliable design method for the valve plate thickness design of the cylinder hydraulic shock absorber in foreign countries. Most of them first determine a valve plate thickness value based on experience, and then finally determine the design parameters through repeated tests, verification and modification methods. The main reason is the lack of an accurate and reliable calculation method for the deformation of the annular elastic valve plate of the shock absorber. Therefore, it is difficult to establish an accurate mathematical model for the thickness design of the shock absorber valve plate and the simulation of the shock absorber characteristics. The annular elastic valve plate of the shock absorber is the most critical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 周长城张秀珍曹海琳
Owner SHANDONG UNIV OF TECH
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