定子内置式磁流变制动器制动性能分析  

Braking Performance Analysis of Stator Built-in Magnetorheological Brake

作　　者：张利青 胡国良 喻理梵 朱文才 ZHANG Liqing;HU Guoliang;YU Lifan;ZHU Wencai(School of Mechatronics and Vehicle Engineering,East China Jiaotong University,Nanchang Jiangxi 330013,China)

机构地区：[1]华东交通大学机电与车辆工程学院,江西南昌330013

出　　处：《机床与液压》2025年第7期111-117,183,共8页Machine Tool & Hydraulics

基　　金：国家自然科学基金地区科学基金项目(52165004);江西省国际科技合作重点项目(20232BBH80010)。

摘　　要：针对传统磁流变制动器磁场利用率不高及空间利用率低的问题,设计一种定子内置式磁流变制动器。将定子设置在制动器内部,转轴带动制动器外壳旋转,在不改变制动器结构尺寸前提下,增大阻尼间隙长度,从而增大输出制动转矩。通过合理组合隔磁材料及导磁材料,引导磁力线垂直穿过4段轴向和4段径向阻尼间隙。通过阐述制动器结构及工作原理,对8段有效阻尼间隙进行磁路分析,推导并建立制动器输出转矩、电磁场和温度场数学模型。基于COMSOL有限元仿真软件,对磁流变制动器的电磁场与温度场进行仿真分析。结果表明:当外加电流为2 A、转速为500 r/min时,制动器输出转矩可达39.87 N·m;单次紧急制动下,最高温度为29.2℃,多次紧急制动的情况下,最高温度为43.2℃,满足磁流变液正常工作要求。Aiming at the problem of low utilization rate of magnetic field and low space utilization rate of traditional magnetorheological(MR)brake,a stator built-in MR brake was designed.The stator was set inside the brake,and the brake shell was rotated by the rotating shaft,and the damping gaps were increased without changing the size of the brake structure,so as to the output braking torque was increased.Through the reasonable arrangement of magnetic insulation materials and magnetic conductive materials,the magnetic flux lines could be guided to pass through four axial and four radial damping gaps vertically.The structure and working principle of the stator built-in MR brake were described.The magnetic circuit analysis of the eight damping gaps was carried out.At the same time,the mathematical models of the output torque,electromagnetic field and temperature field of the MR brake were derived and established.The electromagnetic field and temperature field of the MR brake were simulated based on COMSOL software.The results show that the output torque of the brake can reach 39.87 N·m when the applied current is 2 A and the speed is 500 r/min.In the case of single emergency braking,the maximum temperature is 29.2°C.In the case of multiple emergency braking,the maximum temperature is 43.2°C,which meets the needs of normal operation of MR fluid.

关 键 词：磁流变制动器 定子内置式 电磁场 温度场 

分 类 号：TH134[机械工程—机械制造及自动化] U463.5[机械工程—车辆工程]