摘要
为研究应用于汽车的波纹状磁流变制动器在磁流热场强耦合作用下的温度特性,建立了磁流变制动器的磁流耦合和热流耦合有限元分析模型,采用直接序贯耦合法得到磁流变制动器的磁场分布和稳态非制动工况、正常制动工况、紧急制动工况、连续间歇制动工况下的温度分布及其变化规律。研究结果表明,在稳态非制动工况,磁流变制动器温度分布近乎均匀,而在正常制动、紧急制动工况和连续间歇制动工况下的最高温度分别为92. 4℃、111. 2℃、80. 4℃,制动间隙内的温度均呈现先上升后下降的变化趋势;随着励磁电流的增加,磁流变制动装置在制停过程中的最高温度也逐渐上升,但其上升幅度越来越小。研究结果可为磁流变制动器的设计和应用提供参考依据。
(MRB) applied to the vehicle under the strong coupling of magnetic fluid thermal field,the finite element analy-sis models of magnetic fluid coupling and thermal fluid coupling are established. The magnetic field distribu-tion,temperature distribution under steady non-braking condition,and the transient temperature distributionunder normal braking,emergency braking and frequency interval braking conditions are obtained by using di-rect sequential coupling method. The results show that the temperature distribution of corrugated MRB is nearlyuniform under steady non-braking condition,while the maximum temperature under normal braking,emergen-cy braking and frequency interval braking conditions are 92.4 ℃,111.2 ℃ and 80.4℃ respectively,the temper-ature in the brake clearance shows a tendency of rising first and then falling. With the increase of excitation cur-rent,the maximum temperature of MRB device gradually increases in the process of breaking,but,its risingrange is smaller and smaller. The results can provide reference for the design and application of MRB.
作者
陶东娅
方志刚
Tao Dongya;Fang Zhigang(School of Mechanical and Electronic Engineering,Taizhou Vocational&Technical College,Taizhou 312000,China;School of Science,Zhejiang Sci-Tech University,Hangzhou 310018,China;School of Mechanical Engineering,Taizhou University,Taizhou 312000,China)
出处
《机械传动》
北大核心
2020年第1期84-89,共6页
Journal of Mechanical Transmission
基金
台州市2019年度教育科学规划研究课题(gg19023)
关键词
磁流变制动器
温度特性
磁流耦合
热流耦合
Magnetorheological brake
Temperature characteristic
Magnetic fluid coupling
Thermal fluid coupling
