两级径向流蜿蜒式磁流变阀结构设计与动态性能分析  

Structure Design and Dynamic Performance Analysis of Two-stage Radial Type Magnetorheological Valve with Meandering Fluid Flow Paths

作　　者：胡国良[1] 钟芳[1] 张海云[1] 徐明[1] 

机构地区：[1]华东交通大学载运工具与装备教育部重点实验室,南昌330013

出　　处：《农业机械学报》2016年第10期376-382,389,共8页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金项目(51165005;51475165;11462004);江西省自然科学基金项目(20151BAB206035)

摘　　要：设计了一种具有复杂液流通道结构的两级径向流蜿蜒式磁流变阀,其液流通道主要由2段圆环轴向流、4段圆盘径向流及3段中心小孔流组成。阐述了两级径向流蜿蜒式磁流变阀的工作原理,并推导了其压降数学模型。采用有限元法（FEM）对两级径向流蜿蜒式磁流变阀电磁场进行了建模仿真,分析了磁流变阀压降变化规律,仿真结果表明加载电流为0.8 A时压降为5.81 MPa。搭建了磁流变阀压降性能及响应特性测试实验台,对不同加载电流及不同模拟负载下的磁流变阀压降性能进行了实验分析,结果表明加载电流为0.8 A时压降可达5.77 MPa,与仿真结果基本相符。同时,对磁流变阀压力响应时间进行了测试分析,实验结果表明所设计的磁流变阀响应迅速,响应时间在3～7 ms之间;并且响应上升时间比下降时间短;负载对响应时间没有影响;激励电流越大,响应越快。Magnetorheological（ MR） valve is a kind of smart control mechanism that using magnetorheologcial fluid as the working fluid. The advantages of regulating pressure drop and fast response time make the valve have a promising application prospects in the field of vibration attenuating system. Such as,it can be used as a bypass valve to control the MR damper,which can be formed a MR valve controlled cylinder mechanism to apply in the vehicle suspension system. A two-stage radial type MR valve with meandering fluid flow paths was developed,the fluid flow paths consisted of two annular fluid flow channels,four radial fluid flow channels and three centric pipe fluid flow channels. The working principle of the proposed MR valve was expounded in detail,and the mathematical model of pressure drop was also derived based on the Bingham model. The electromagnetic field model of the MR valve was built up by using the finite element method. The changes of pressure drop under different applied currents were analyzed,the simulation results showed that the pressure drop was 5. 81 MPa at applied current of 0. 8 A. At the same time,the experimental test rig was set up to investigate the pressure drop and response time of the proposed MR vale under different applied currents and different loading cases,the experimental results showed that the pressure drop was 5. 77 MPa at applied current of0. 8 A,which was accorded with the simulation results. The response time was also tested,and the test results indicated that the response time was between 3 ms and 7 ms; the results also showed that the rising response time was shorter than the falling response time. Furthermore,the response time was independent of the loading cases,and the bigger the applied current of the excitation coil was,the faster the response time was.

关 键 词：磁流变阀 两级径向流 蜿蜒式液流通道 结构设计 动态性能 

分 类 号：TH137.5[机械工程—机械制造及自动化]