外流式滑阀流场仿真及其结构优化  

Simulation of Flow Field and Structure Optimization of External Flow Spool Valve

作　　者：杨国琦 刘赫 赵星宇 葛磊 权龙 YANG Guoqi;LIU He;ZHAO Xingyu;GE Lei;QUAN Long(Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education,Taiyuan University of Technology,Taiyuan,Shanxi 030024)

机构地区：[1]太原理工大学新型传感器与智能控制教育部与山西省重点实验室,山西太原030024

出　　处：《液压与气动》2025年第3期26-33,共8页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(52275063)。

摘　　要：针对滑阀受液动力影响难以精准控制的问题,运用Fluent软件对外流式滑阀内部流场进行仿真计算,分析阀口开度和流量变化对阀芯壁面压力分布的影响,并通过实验进行验证。从平衡阀芯壁面受力的角度提出了阀芯壁面特定径向位置上打孔的优化阀芯结构。结果表明:仿真计算的外流式滑阀壁面压力分布与实验结果趋势相同,入口壁面的径向压力分布基本相等,出口壁面的压力分布呈现阀根处大、阀口处小的状态,壁面压力峰值均随着流量的增大而增大,随着阀口开度的增大而减小;稳态液动力是油液流动导致壁面压力积分不相等产生的,优化的阀芯结构可以有效减小液动力,不同流量的平均液动力补偿效果可达到75%。Aimed at the problem that it is difficult to accurately control the spool valve under the influence of flow force,the internal flow field of the spool valve is simulated by using Fluent software,and the influence of the opening and flow rate changes on the pressure distribution of the spool wall is analyzed and verified by experiments.From the point of view of balancing the force on the wall surface of the spool,the optimized structure of the spool is proposed.The results show that he pressure distribution on the wall of the external flow valve calculated by simulation is the same as the experimental results.The radial pressure distribution on the inlet wall is basically equal,while the pressure distribution on the outlet wall is large at the valve root and small at the orifice.The peak value of wall pressure increases with the increase of flow rate and decreases with the increase of the opening of the valve port.The steady-state flow force is caused by the uneven pressure integral of the wall caused by the oil flow.The optimized spool structure can effectively reduce the flow force,and the average flow force compensation effect of different flow rates can reach 75%.

关 键 词：滑阀 压力分布 实验验证 稳态液动力 液动力补偿 结构优化 

分 类 号：TH137[机械工程—机械制造及自动化]