基于CFD技术盘式磁流变液制动器结构及性能  

Structure and performance of disc-type magnetorheological fluid brake based on CFD

作　　者：柏宗春[1,2] 吕晓兰[1,2] Bai Zongchun;Lv Xiaolan(Institute of Agricultural Facilities and Equipment,Ministry of Agriculture,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China;Key Laboratory of Protected Agriculture Engineering in the Middle and Lower Reaches of Yangtze River,Ministry of Agriculture, Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China)

机构地区：[1]江苏省农业科学院农业设施与装备研究所,江苏南京210014 [2]江苏省农业科学院农业部长江中下游设施农业工程重点实验室,江苏南京210014

出　　处：《南京理工大学学报》2018年第4期474-483,共10页Journal of Nanjing University of Science and Technology

基　　金：江苏省农业科技自主创新资金CX(16)1002;江苏省现代农业重点项目(BE2017303);农业部设施农业工程重点实验室开放课题

摘　　要：为了研究转盘结构对盘式磁流变液制动器的性能的影响,对制动器磁流变液流场进行了仿真和试验研究。根据制动器的结构特点和磁流变液宾汉模型理论,运用计算流体动力学(Computational fluid dynamics,CFD)软件Fluent对不同转盘结构下,制动器内磁流变液流场的速度、压力、黏度及剪切应力分布进行仿真,得到制动力矩随结构和磁场强度的变化规律,并进行了试验验证。仿真及试验结果表明:磁流变液腔室宽度对制动力矩影响较小,表面开辐射状槽时转盘制动力矩最大,开有通孔的情况次之,开环形槽时制动力矩最小。研究结果为磁流变液制动器的结构设计提供了参考依据。In order to study the effect of turntable structure on the performance of disc-type the magnetorheological fluid(MRF)brake,simulations and experiments of the MRF in the brake are carried out.A computational fluid dynamics(CFD)model of the MRF in the brake is built according to the structural characteristics of the brake and the Bingham model of MRF.Simulations with ring grooves,radial grooves and through holes on the surface of the turntable are carried out at a certain speed and magnetic field strength using Fluent respectively.The velocity,pressure,viscosity and shear stress distribution of the MRF flow in the brake are analyzed.The braking torque of the MRF acting on the turntable is obtained by using the integral method.In order to verify the simulation results,experiments with different turntables are carried out.The simulation and experimental results show that the size of the MRF chamber width has little effect on the braking torque;the braking torque is the maximum when the turntable has radial grooves on the surface,the case with through-holes is the second,and the case with ring grooves is the minimum.The research results provide references for the structural design of the MRF brake.

关 键 词：磁流变液 盘式制动器 流场仿真 宾汉模型 制动力矩 表观黏度 剪切应力 

分 类 号：TG156[金属学及工艺—热处理] TP319[金属学及工艺—金属学]