摘要
滑阀阀芯同时存在偏心和倒锥时会产生加剧卡紧的径向不平衡力,发生液压卡紧。结合实际加工圆柱度要求,分析其与倒锥和偏心的关系,针对阀芯所受径向不平衡力最大情况进行开设均压槽设计。结果表明:对于开设单条均压槽的情况,当均压槽深度达到一定值时,径向不平衡力减小效果不再变化;均压槽越宽,径向不平衡力减小效果越好,但泄漏量越大;均压槽开设位置距离高压端越近,泄漏量越大。根据泄漏量要求确定了开设均压槽的尺寸和条数,采用响应曲面法拟合阀芯所受径向不平衡力与两条均压槽开设位置和槽间距的关系,采用MATLAB求出径向不平衡力最小时均压槽的最佳开设位置和槽间距,并进行仿真分析。结果表明:开设均压槽后,阀芯所受径向不平衡力由24.77 N减小到1.87 N,减小了92.5%,为均压槽设计提供参考。
When the spool of the slide valve is both eccentric and inverted,it will produce the radial unbalance force which intensifies the clamping,leading to hydraulic clamping.According to the requirement of actual machining cylindricity,the relationship between cylindricity and inverted cone and eccentricity was analyzed,and pressure-equalizing tanks were designed for the maximum radial unbalance force.The results indicate that for the case of a single pressure-equalizing tank,the reducing effect of the radial unbalance force does not change when the depth of the pressure-equalizing tank reaches a certain value.The wider the pressure-equalizing tank is,the better the reducing effect of the radial unbalance force is,but the leakage greater;the closer the pressure-equalizing tank setting up position to the high pressure end is,the greater the leakage is.The size and number of pressure-equalizing tanks were determined according to the leakage requirements.The relationship between the radial unbalance force of two pressure-equalizing tanks and the setting up position and the tank wide was fitted by the response surface method.MATLAB was used to determine the minimum radial unbalance force and the best setting up position and wide of pressure-equalizing tanks,the simulation analysis was conducted.The results indicate that after setting up pressure-equalizing tanks,the radial unbalance force on the spool decreases from 24.77 N to 1.87 N,with a reduction of 92.5%,which provides reference for the design of pressure-equalizing tanks.
作者
张君
李海龙
任芸
刘文平
王伟
ZHANG Jun;LI Hailong;REN Yun;LIU Wenping;WANG Wei(College of Mechanical Engineering,Chongqing University of Technology,Chongqing 400054,China;The Third Military Representative Office of Chengdu Air Armament Bureau Stationed in Guiyang Region,Guiyang Guizhou 550000,China;Guizhou Fengyang Hydraulic Co.,Ltd.,Guiyang Guizhou 550009,China)
出处
《机床与液压》
北大核心
2025年第10期156-160,166,共6页
Machine Tool & Hydraulics
关键词
泄漏量
径向不平衡力
均压槽
响应曲面
leakage
radial unbalance force
pressure-equalizing tank
response surface
作者简介
张君(1968-),男,硕士,高级工程师,主要研究方向为液压技术。E-mail:zhangxj@cqut.edu.cn。
