液压振动试验台直动式溢流阀异常泄露分析及优化

Analysis and Optimization of Abnormal Leakage of Direct-Acting Relief Valve in Hydraulic Vibration Test Bench

针对振动试验台测试时产生的振动影响直动式溢流阀异常泄露问题,通过建立振动环境下阀芯开口量数学模型,并结合MATLAB及控制变量法,分析振动与元件结构参数对泄漏量的影响规律。在研究各影响因素的基础上,以最小泄漏量为目标函数,基于遗传算法对溢流阀异常泄露影响因素进行优化,从而得到稳定性较高的试验台。优化结果显示:在满足各因素变化范围内经优化后,振动频率、振幅、质量分别下降35.25%、30.7%、18.75%;溢流阀弹簧刚度、粘性阻尼系数分别提升28.59%、30.85%,可使得异常泄漏量减少96.98%;所得结果为振动试验台设计及溢流阀结构优化提供重要参考理论依据。

Aiming at the abnormal leakage of direct-acting relief valve caused by vibration during the test of the vibration test bench,the mathematical model of the valve core opening under the vibration environment is established,and MATLAB and the control variable method are combined to analyze the effect of vibration and component structure parameters on the leakage.The law of influence.On the basis of studying various influencing factors,with the minimum leakage as the objective function,the genetic algorithm is used to optimize the influencing factors of the abnormal leakage of the overflow valve,so as to obtain a test bench with higher stability.The optimization results show that after optimization within the range of changes in various factors,the vibration frequency,amplitude,and mass are reduced by 35.25%,30.7%,and 18.75%;the spring stiffness and viscous damping coefficient of the relief valve are increased by 28.59%and 30.85%respectively,which can make the amount of abnormal leakage is reduced by 96.98%;the obtained results provide an important theoretical basis for the design of the vibration test bench and the optimization of the overflow valve structure.