液压换向阀阀芯液膜支承力和泄漏研究  

Research on Support Force and Leakage of Liquid Membrane of Hydraulic Valve

作　　者：陈烨波 许静[1] 倪敬[1] CHEN Yebo;XU Jing;NI Jing(School of Mechanical Engineering,Hangzhou Dianzi University,Hangzhou Zhejiang 310018,China)

机构地区：[1]杭州电子科技大学机械工程学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2018年第5期60-65,共6页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家自然科学基金资助项目(51505112);浙江省自然科学基金资助项目(LQ15E050010)

摘　　要：采用基于N-S方程的计算流体动力学方法,在不同压差下,研究不同深厚比、径宽比的微织构对液压换向阀阀芯静止时的泄漏量及阀芯运动时的液膜支承力的影响,优化阀芯表面微织构形貌,使阀芯运动时具有较好的减摩润滑效果,并降低阀芯静止时泄漏量。研究结果表明:表面微织构化阀芯的表面液膜支承力随着压差的增大先增大后减小;微织构表面的液膜支承力随着深厚比和径宽比的增大均呈增大趋势;微织构表面泄漏量随着径宽比、深厚比的增大而增大,但微织构表面的泄漏量随着深厚比的增大增幅逐渐减小,并趋于一个稳定值。This paper uses CFD method based on N-S equation to study.The effects of different depth-thickness ratio and diameter-width ratio micro-texture on the static valve spool leakage and the liquid film support of the moving valve were studied under different pressure differences.By optimizing the micro-textured topography of the valve core,the valve core has better lubrication effect during movement and reduces the leakage of the valve spool when it is stationary.The results show that the supporting force of the liquid film with micro-textured valve spool first increases and then decreases with the increase of differential pressure.The support force of the liquid film on the microtextured surface increases with the increase of the depth-thickness ratio and diameter-width ratio.The leakage of the micro-textured surface increases with the increase of diameter-width ratio and depththickness ratio.However,the leakage of micro-textured surface converges to a stable value with the increase of depth-thickness ratio.

关 键 词：阀芯 微织构 深厚比 径宽比 

分 类 号：TH117[机械工程—机械设计及理论]