摘要
磁流变阀是一种以磁流变液为工作介质的智能控制器件,其进出口压差可调且响应速度快的特点使其在减振抗震系统中具有广泛的应用前景。设计了一种典型的阻尼间隙为圆环流动式的圆环流磁流变阀,对其工作原理进行了阐述,同时推导了圆环流磁流变阀的压降数学模型。采用有限元法(FEM)和计算流体力学法(CFD)分别对圆环流磁流变阀的电磁场和流场进行了建模仿真,分析了不同电流下磁流变阀压降变化规律,仿真结果表明圆环流磁流变阀的压降随着加载电流的增大而增大,并且逐渐趋于饱和;同时采用FEM方法得到的最大压降为948 k Pa,采用CFD方法得到的最大压降为1 079 k Pa。搭建了圆环流磁流变阀压降性能试验台,对不同电流及不同负载下的磁流变阀压降性能进行了试验分析,并与仿真结果进行了对比,结果表明试验压降变化趋势与两种仿真方法得出的压降变化基本相符,试验测试得到的最大压降为662 k Pa。同时,试验结果表明外加负载对圆环流磁流变阀压降大小变化基本无影响。
The magnetorheological（ MR） valve is a smart control mechanism that using the magnetorheologcial fluid as the working fluid. The advantages of regulating pressure drop and fast response time make it has a promising application prospects in the vibration attenuating system. In this paper,an annular type MR valve with a fluid flow resistance gap of 2. 5 mm was proposed; the working principle of the MR valve was expounded in detail. At the same time,the mathematical model of pressure drop was derived based on the Bingham model. The electromagnetic field model and fluid flow filed model were established using the finite element method（ FEM） and computational fluid dynamics（ CFD）,respectively. The changes of the pressure drop under different applied currents were analyzed using both of simulation methods,and the simulation result of pressure drop in the FEM method was accorded with that in CFD method. The maximum pressure drop using the FEM method was 948 k Pa,while the maximum pressure drop using the CFD method was 1 079 k Pa. Finally,the experimental test rig was set up to investigate the pressure drop of the proposed MR vale under different applied currents and different loading cases,the test results show that the maximum pressure drop is 662 k Pa at the applied current of1. 8 A,and the pressure drop is independent of the loading cases. Furthermore,the experimental results were compared to the simulation results too,and they are accorded with each other to some extent. In a word,the relevant results can provide some guidance for the design of other types of MR valves.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2016年第3期381-388,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)
关键词
磁流变阀
圆环流
压降
性能分析
MR valve
annular fluid flow
pressure drop
performance analysis
