T型磁流变制动器的有效工作间隙位置对制动性能的影响

Effect of Effective Working Gap Position on Braking Performance of T-type Magnetorheological Brake

针对T型结构磁流变制动器工作间隙的位置和数量的不同对制动性能的影响,结合理论建模与模拟仿真分析,在同等外形尺寸、同种磁流变液材料的约束下,对T型结构磁流变制动器不同工作状态下的制动力矩和磁场分布进行了研究。基于工作间隙的不同位置和数量,进行了磁路的设计和制动力矩理论建模与计算;通过仿真结果和理论计算结果的对比,对不同位置的工作间隙所产生的制动力矩进行了分析。结果表明,当所使用磁流变液的材料、制动器的外形尺寸一致的情况下,对比制动力矩的仿真分析结果和理论计算结果,两者的相对差值在盘式工作状态下大于筒式工作状态。其中,盘式工作状态下,间隙A的相对差值最大;筒式工作状态下,间隙D的相对差值最小。进一步地,间隙D在单位磁动势下产生的制动力矩最大,表明该工作状态下制动器的能量利用率最高。研究结果为T型结构磁流变制动器的设计研究提供了理论参考。

Aiming at the effect of different position and quantity working gaps of T-type magnetorheological(MR)brake on braking performance,combined with theoretical modeling and simulation analysis,the braking torque and magnetic field distribution of T-type magnetorheological brakes under different working states are studied under the constraints of the same size and the same magnetorheological fluid(MRF)material.Based on the different position and quantity of working gaps,the design of magnetic circuit and the theoretical modeling and calculation of braking torque are carried out.By comparing the simulation results with the theoretical calculation results,the braking torque generated by the working gaps at different positions is analyzed.The results show that when the MRF used in brake,the overall dimensions of consistent case,through the contrast of braking torque of the simulation analysis results and the theoretical calculation results,the relative difference in disc work condition is greater than the drum-type working state.Among them,under the disc working state,the relative difference of gap A is the largest,in the drum-type working state,the relative difference of gap D is the smallest.Furthermore,the braking torque generated by the gap D unit magnetomotive force is the largest,which indicates that this type of brake has the highest energy utilization rate under this working state.The research results provide a reference for the design and research of T-type magnetorheological brake.