卸荷阀主阀芯配合间隙内固体颗粒的分布研究  

Research on Distribution of Solid Particles in the Clearance of Unloading Valve Main Spool

作　　者：解浩 张胜军 徐静 XIE Hao;ZHANG Sheng-jun;XU Jing(College of Mechanical and Electrical Engineering,Lanzhou Institute of Technology,Lanzhou 730050,China)

机构地区：[1]兰州工业学院机电工程学院,甘肃兰州730050

出　　处：《液压气动与密封》2024年第7期40-45,共6页Hydraulics Pneumatics & Seals

基　　金：甘肃省高等学校创新基金项目(2022B-246);兰州工业学院青年科技创新项目(2021KJ-18)。

摘　　要：结合生产应用中出现的卸荷阀铜套磨损问题,运用Fluent软件中的多相流欧拉模型,对工作介质为乳化液的卸荷阀主阀腔内部流场进行固液两相流数值解析。研究分析表明:固体颗粒在阀芯与铜套形成的配合间隙中存在聚集现象;直径7μm的固体颗粒在间隙内易引起轻微磨蚀;直径10μm的固体颗粒在间隙内引起严重磨蚀磨损,产生新的固体颗粒,使间隙内固体体积分数最大值升高至进口的3倍左右。针对固体颗粒物聚集引发的磨蚀磨损问题,提出优化方案。通过仿真分析,证明在阀杆上加工环形槽,并在槽间凸肩上打径向孔的结构可起到疏导固体颗粒、缓解磨蚀磨损的作用。Focus on the wear phenomenon of the copper sleeve of the main valve of the unloading valve in practice,this paper applies the Eulerian model of multiphase flow in Fluent software to analyze the numerical analysis of solid-liquid two-phase flow inside the main cavity of the unloading valve,where the working medium is emulsion.Research shows:Solid particles accumulate in the gap between the valve core and the moving pair of copper sleeve;Solid particles with a diameter of 7μm tend to cause slight abrasion in the gap;Solid particles with a diameter of 10μm cause severe abrasive wear in the gap,generating new solid particles and raising the maximum value of the solid volume fraction in the gap to about three times that of the inlet.Optimization solutions are proposed for the abrasive wear problem caused by solid particulate matter aggregation.Through simulation analysis,it is proved that the structure of machining annular grooves on the valve stem and drilling radial holes in the shoulders between the grooves can play a role in evacuating solid particles and alleviating abrasive wear.

关 键 词：卸荷阀 固体颗粒分布 聚集 磨蚀磨损 改进优化 

分 类 号：TH137[机械工程—机械制造及自动化]