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Temperature rise characteristics of the valve-controlled adjustable damping shock absorber

机译：阀控制可调节阻尼减震器的升温特性

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摘要

The thermodynamic study of the valve-controlled adjustable damping shock absorber is conducted in order to solve the problem of oil leakage caused by excessive temperature rise of shock absorber. In this paper, the temperature rise of the valve-controlled adjustable damping shock absorber is analyzed from the perspective of energy conservation. Combined with the theory of fluid mechanics, the damping heat model is established, and the heat dissipation model of the shock absorber is established based on heat convection, heat conduction and heat radiation. The corresponding thermal equilibrium equation is established on the basis of damping heat and heat dissipation. The effects of vibration velocity, outer diameter, thickness and length of reservoir cylinder, and wind velocity on its thermal performance have been investigated. Specifically, temperature after thermal equilibrium will grow with the increase of vibration velocity and thickness of reservoir cylinder and degrade with the increase of outer diameter, length of reservoir cylinder and wind velocity. The higher the balance temperature, the shorter time is required to arrive thermal equilibrium. The difference between the experimental and simulation values of oil temperature after thermal equilibrium was not more than 2 degrees C, which verified the correctness of the theoretical model, while the experimental value in the process of temperature rise lagged behind the simulation value, which was mainly caused by the cumulative error of step-by-step iteration and the mechanical hysteresis in the experiment. The conclusions obtained can provide some references for the design of shock absorbers.
机译：进行了阀控制可调节阻尼减震器的热力学研究，以解决因减震器的过度温度升高引起的漏油问题。本文从节能的角度分析了阀控制可调节阻尼减震器的温度升高。结合流体力学理论，建立了阻尼热模型，基于热对流，导热和热辐射建立了减震器的散热模型。基于阻尼热和散热来建立相应的热平衡方程。研究了储存筒的振动速度，外径，厚度和长度的影响，以及风速对其热性能的影响。具体而言，热平衡后的温度随着储存缸的振动速度和厚度的增加而生长，并且随着外径的增加，储存器圆筒的长度和风速而降低。平衡温度越高，较短的时间需要到达热平衡。热平衡后油温实验和模拟值之间的差异不大于2℃，验证了理论模型的正确性，而温度升高过程中的实验值落后于模拟值，主要是由逐步迭代的累积误差和实验中的机械滞后引起。获得的结论可以为减震器设计提供一些参考。

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