基于有限元的大流量换向阀仿真分析及结构优化

为了提高大流量换向阀的设计能力,该文采用ANSYS仿真平台对大流量换向阀仿真分析及结构优化。研究结果表明:撞击阶段应力集中区域基本出现在二级阀芯径向进油口部位,此时形成的最大应力等于24.26 MPa,明显比682 MPa的材料屈服极限更低。进液阀套达到了271.83 MPa的最大压应力,但明显低于682 MPa的屈服极限,表明壁厚满足设计标准。进液阀套形最大应力出现在阀套内部,跟瞬态冲击条件下最大应力出现区域存在明显差异。二级阀芯最大应力都出现于阀芯部位,完成结构优化之后,二级阀芯的最大应力发生了显著降低,其余各部位的应力也显著减小,可以满足设计标准。

Simulation Analysis and Structure Optimization of High Flow Directional Valve Based on Finite Element Method

in order to improve the design ability of large flow directional valve,this paper adopts ANSYS simulation platform to analyze and optimize the structure of large flow directional valve.The results show that the stress concentration area in the impact stage is basically at the radial inlet of the secondary spool,and the maximum stress formed at this time is equal to 24.26 MPa,which is obviously lower than the yield limit of 682 MPa material.The inlet valve sleeve reached the maximum compressive stress of 271.83 MPa,but was significantly lower than the yield limit of 682 MPa,indicating that the wall thickness met the design standard.The maximum stress of inlet valve sleeve appears inside the valve sleeve,which is obviously different from the area where the maximum stress appears under transient impact condition.The maximum stress of the secondary spool occurs at the position of the spool.After the completion of structural optimization,the maximum stress of the secondary spool is significantly reduced,and the stress of other parts is also significantly reduced,which can meet the design criteria.