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The Calculation Method of the Maximum Circumferential Stress of Annular Valve Disc with Unequal Thickness in Oil-Pneumatic Spring

A technology of circumferential stress, oil and gas spring, applied in the field of oil and gas spring, can solve the problems of lack of analytical calculation formula and inability to meet, and achieve the effect of reliable calculation method, fast calculation and accurate calculation result

Active Publication Date: 2018-01-05
SHANDONG UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

With the rapid development of the automobile industry and the continuous improvement of driving speed, higher requirements are put forward for the design of oil-gas springs and unequal-thickness annular valve plates. Currently, the maximum circumferential stress is calculated by solid modeling using finite element simulation software. Simulation check calculation lacks accurate analytical calculation formulas, which cannot meet the requirements of the rapid development of the modern automobile industry and the modern CAD design of oil and gas springs

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  • The Calculation Method of the Maximum Circumferential Stress of Annular Valve Disc with Unequal Thickness in Oil-Pneumatic Spring
  • The Calculation Method of the Maximum Circumferential Stress of Annular Valve Disc with Unequal Thickness in Oil-Pneumatic Spring
  • The Calculation Method of the Maximum Circumferential Stress of Annular Valve Disc with Unequal Thickness in Oil-Pneumatic Spring

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Embodiment Construction

[0026] The present invention will be further described in detail through an embodiment below.

[0027] The oil and gas spring of a special vehicle adopts annular valve discs of unequal thickness, the elastic modulus E = 200GPa, Poisson's ratio μ = 1 / 3, and the thickness of the equal thickness part is h 0 =0.3mm, variable thickness radius r t =7.3mm, effective inner circle radius r a =5.0mm, outer circle radius r b =8.5mm, the uniform pressure received is p=3.0MPa.

[0028] The calculation method of the maximum circumferential stress of the oil-gas spring unequal thickness annular valve plate provided by the example of the present invention, its calculation flow chart is as follows figure 1 As shown, the mechanical model of the oil-gas spring unequal-thickness annular valve plate is as follows figure 2 As shown, the specific steps are as follows:

[0029] (1) Determine the constant term X formed by the maximum circumferential stress coefficient of the unequal-thickness an...

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Abstract

The invention relates to a method for calculating the maximum circumferential stress of an oil-gas spring annular valve plate with unequal thickness, and belongs to the technical field of oil-gas suspension. Previously, there was no reliable calculation method for the maximum circumferential stress of oil-gas springs with unequal thickness annular valve plates. Most of them used finite element software to simulate the maximum circumferential stress under a given pressure, which could not meet the requirements of modern CAD design of oil-gas springs. The method for calculating the maximum circumferential stress of the unequal-thick annular valve plate of the oil-gas spring provided by the invention can accurately and quickly calculate the maximum circumferential stress according to the structural parameters and material performance parameters of the unequal-thickness annular valve plate of the oil-gas spring. By comparing with the ANSYS simulation results, it can be known that this calculation method is accurate and reliable, and provides a reliable maximum circumferential direction of the oil-gas spring unequal-thickness annular valve plate for the realization of the modern CAD design of the oil-gas spring and the calculation of the stress intensity of the annular valve plate of unequal thickness. stress calculation method.

Description

technical field [0001] The invention relates to an oil-gas spring, in particular to a method for calculating the maximum circumferential stress of an oil-gas spring with unequal thickness annular valve plates. Background technique [0002] For the maximum circumferential stress of the oil-gas spring unequal-thickness annular valve plate, there is no accurate and reliable calculation method at home and abroad. Most of them use finite element simulation software to establish the entity Numerical simulation of the model can obtain an approximate numerical solution, but a solid model needs to be established and accurate analytical formulas and calculation methods cannot be provided. Since the damage of the unequal-thickness annular valve plate of the oil-gas spring is not only affected by the radial stress, but also affected by the circumferential stress, the unequal-thickness annular valve plate will break along the radial direction, mainly due to the unequal-thickness annular ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 周长城赵雷雷潘礼军王凤娟邵明磊于曰伟
Owner SHANDONG UNIV OF TECH
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