磁梯度箍缩磁流变阀压降性能仿真分析

针对目前磁流变阀压降调节方式单一的不足,基于磁流变液磁梯度箍缩模式设计了一种液流通道截面积随外部磁场变化而变化的磁流变阀,阐述了磁流变阀的结构及工作原理,推导了压降数学模型。采用有限元法对磁梯度箍缩磁流变阀的磁场和流场进行仿真,分析了磁流变液入口速度、输入电流、液流通道半径对磁流变阀压降变化的影响规律。结果表明:磁流变阀在设计结构下产生高梯度磁场,能够有效控制液流通道的截面积大小;阀进出口压降随着液流入口速度、输入电流的增加逐渐增大,随着液流通道半径的增加而减小,其中液流入口速度影响最小,液流通道半径影响最大。当液流入口速度为1.5 m/s、输入电流为1.5 A、液流通道半径为0.5 mm时,磁梯度箍缩磁流变阀的压降可达1.89 MPa。

Simulation Analysis of Pressure Drop Performance of Magnetic Gradient Pinch Magnetorheological Valve

For the pressure drop regulation of magnetorheological(MR)valve is lack of diversity,a magnetorheological valve was designed based on magnetorheological fluid(MRF)magnetic gradient pinch mode(MGP).The structure and working principle of the MR valve was expounded,and the model of the pressure drop was derived.The magnetic field and the flow field of magnetic gradient pinch magnetorheological valve were simulated by finite element method,the influence law of the magnetorheological fluid inlet velocity,input current and flow channel radius on the pressure drop of the MR valve was analyzed.The results show that the MR valve can generate a high gradient magnetic field,and can effectively control the cross-sectional area of the liquid flow channel.The pressure drop of the MR valve is increased with the increase of the liquid inlet velocity and the current,and decreased with the increase of the liquid flow channel radius.Among them,the liquid inlet velocity has the least influence,and the liquid flow channel radius has the greatest influence.When the inlet velocity is 1.5 m/s,the input current is 1.5 A,and the radius of the liquid flow channel is 0.5 mm,the pressure drop of the magnetic gradient pinch magnetorheological valve can reach 1.89 MPa.