液压伺服阀阀芯结构优化及实验验证

Structure Optimization and Experimental Verification of Hydraulic Servo Valve Spool

以减小阀芯在工作中所受的液动力为目标,以阀芯的外形结构参数为优化变量,对液压伺服阀阀芯结构优化的方法进行了研究。使用SPEA2算法对阀芯的结构进行了多目标优化设计,获得了Pareto最优的阀芯结构设计方案。利用CFD仿真软件计算了优化前后阀芯流场和压力分布,验证了优化效果。搭建了一套实验平台,对优化前后的阀芯液动力进行测试,通过测量阀芯在工作时的速度以及受力情况等参数,计算出阀芯在工作过程中所受的稳态液动力。测试结果显示,经结构优化后的阀芯在不同开口位移下所受的液动力均出现了下降,稳态液动力平均下降14.86%,其变化趋势与仿真计算一致,均在阀口开口位移为0.6 mm时具有最大的优化效果,进一步验证了优化方案的可行性。

With the goal of reducing the flow force acting on the valve spool during operation,and using the external structural parameters of the valve spool as optimization variables,the method of optimizing the structure of the hydraulic servo valve spool is studied.The SPEA2 algorithm is utilized to optimize the external shape of the spool.The Pareto-optimal designs of the spool shape are obtained.The flow field and pressure distribution of the spool before and after optimization are simulated using CFD software,and the optimization effect is verified.An experimental platform is built to test the hydrodynamic force of the spool before and after optimization.This platform is capable of calculating the steady-state flow force acting on the spool during operation.Experimental results show that the flow force of the optimized spool decreases under different opening displacements,with an average decrease of 14.86%in the steady-state hydrodynamic force.The change trend is consistent with the simulation calculation,and the optimization effect is maximized when the opening displacement of the spool is 0.6 mm,further verifying the feasibility of the optimization scheme.