设计参数对鼓式磁流变液制动器传动性能的影响

Influence of design parameters on transmission performance of drum magnetorheological fluid brake

针对传统圆筒式磁流变液制动器制动转矩小的缺点,提出了一种鼓形间隙磁流变液制动的方法。鼓式磁流变液制动器的磁流变液工作体积比圆筒式的更大,从而制动性能显著提升。通过有限元法对装置进行磁场分析,得到了两种间隙形状和鼓形张角对磁场的影响以及不同电流下磁感应强度与轴向距离的关系;建立了鼓式磁流变液制动器转矩与磁感应强度、半径、角速度等参数的关系。结果表明,鼓形的张角对磁流变液的工作体积影响显著;制动器转矩随电流增大而增大,在3 A时输出转矩为10.56 N·m,比圆筒式磁流变液制动器提高了23.6%。

A drum gap magnetorheological fluid brake is proposed to address the shortcomings of the traditional cylindrical magneto-rheological fluid brake with a small braking torque.Drum magnetorheological fluid brakes have a larger working volume of magnetorheological fluid than cylindrical,resulting in significantly improved braking performance.The magnetic field analysis of the device is carried out by the finite element method,and the influence of two gap shapes and drum tension angle on the magnetic field and the relationship between magnetic induction strength and axial distance under different currents are obtained;the relationship between torque and magnetic induction strength,radius,angular velocity and other parameters of drum magnetorheological fluid brake is established.The results show that the effect of the drum-shaped tension angle on the working volume of the magnetorheological fluid is significant;the brake torque increases with the increase of current,and the output torque at 3 A is 10.56 N·m which is 23.6%higher than that of the cylindrical magnetorheological fluid brake.