两自由度高频转阀阀口压力特性研究  

Analysis of Pressure Characteristics of Two Freedom High Frequency Rotating Valve Port

作　　者：刘智 杨伟 张涛川[1] LIU Zhi;YANG Wei;ZHANG Taochuan(School of Mechanical and Electrical Engineering,Foshan Polytechnic,Foshan Guangdong 528137,China;School of Mechanical and Electrical Engineering,Central South University,Changsha Hunan 410083,China)

机构地区：[1]佛山职业技术学院机电工程系,广东佛山528137 [2]中南大学机电工程学院,湖南长沙410083

出　　处：《机床与液压》2018年第20期68-73,共6页Machine Tool & Hydraulics

基　　金：国家自然科学基金资助项目(51774340);高性能复杂制造国家重点实验室项目(zzyjkt2015-03)

摘　　要：传统的伺服阀大部分都是滑阀式,虽然控制精度高、性能稳定,但其工作频宽有限,难以满足高频液压系统的需求。设计出一种两自由度转阀,该转阀换向频率可以通过提高阀芯转速或增加阀芯沟槽的数量来提高。分析其工作原理、建立数学模型,然后对阀口压力进行仿真和实验研究。结果表明:阀口最大压力随换向频率的增大而减小,随系统压力和轴向开口度的增大而增大;而阀口最小压力随换向频率和系统压力的增大而增大,随轴向开口度的增大而减小。Most of traditional servo valves are slide valve type.Although they have high control precision,stable performance,their working bandwidth are limited.So it is difficult to meet the demand of high frequency hydraulic system.In order to solve this problem,a high frequency excitation rotary valve with two degrees of freedom was proposed.The working principle was analyzed and its mathematical model was established,then the pressure at the valve port was simulated and experimentally studied.The results show that the reversing frequency of the rotary valve can be increased by increasing the spool speed valve or increasing the number of spool grooves.The pressure at the valve port exhibits a regular triangular change.The maximum pressure at the valve port decreases with the increase of the reversing frequency,and increases with the increase of the system pressure and axial opening.The minimum pressure at the valve port increases with the increase of the frequency and the system pressure,and decreases with the increase of the axial opening.

关 键 词：两自由度转阀 换向频率 压力特性 

分 类 号：TH137[机械工程—机械制造及自动化]