改进型径向流磁流变阀压降特性研究

在常规型径向流磁流变阀基础上设置导磁零件和不导磁零件，引导磁力线垂直通过未被利用的轴向液流通道，在未改变阀整体外形尺寸和液流通道总长度下，使常规型径向流磁流变阀同时具备有效径向和轴向阻尼间隙，得到一种改进型径向流磁流变阀.采用有限元法（FEM）仿真模拟以观察零件设置对磁流变阀的磁通量分布和压降变化的影响，并结合推导的磁流变阀压降数学模型评估磁流变阀性能.为了验证仿真结果，组建了磁流变阀压降性能测试平台，加工了同样结构尺寸参数的改进型和常规型径向流磁流变阀，并进行实验对比分析.实验数据表明:同样结构参数和磁场参数下，电流为1.8 A时，常规型径向流磁流变阀压降为3 MPa，而改进型径向流磁流变阀压降可达4 MPa，压降有效增加了33%，从而使磁流变阀应用范围进一步得到拓宽. 

Pressure Drop Analysis of an Improved Radial Type Magnetorheological Valve

An improved radial type magnetorheological valve was developed by guiding the magnetic flux into the annular gap,changing the material properties of the typical single radial type MR valve, and making the valve have both annular flow and radial flow path simultaneously.A finite element analysis was carried out with ANSYS/Emag software to simulate the effects of material properties on the magnetic flux distribution and pressure drop change in the valve,and combined with the derived magnetorheological valve model to predict the valve performance.The experimental test rig was set up to validate the simulation results.The experimental results show that,the pressure drop of the improved radial type MR valve is superior to that of typical radial type MR valve under the same geometry conditions and the same electromagnetic parameters.At the applied current of 1.8 A,the maximum pressure drop of typical radial type MR valve is approximately 3 MPa,while the maximum pressure drop of improved radial type MR valve is approximately 4 MPa,increasing the pressure drop by 33% and enlarging its application range.