Drag Characteristics Prediction for Wet Multi-Disk Brakes  

作　　者：Tianhong Luo Zhongtao Li Fuying Li 

机构地区：[1]School of Mechanotronics & Vehicle Engineering,Chongqing Jiaotong University,Chongqing 400074,China [2]Chongqing University of Arts and Sciences,School of Mechanical & Electrical Engineering,Chongqing 402160,China [3]Operation Company of Guiyang Urban Metro Co. Ltd.,Guiyang 550081,China

出　　处：《Journal of Beijing Institute of Technology》2019年第3期549-560,共12页北京理工大学学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(51375519);the Chongqing Graduate Education Innovation Fund Project(CYS18223);the Chongqing University of Arts and Sciences Graduate School Research Project(M2018ME16)

摘　　要：To improve the characteristics of wet multi-disc brakes (WMDBs), the WMDBs of the drive axles of mining trucks were studied. A model was established to predict the phenomenon of drag characteristics during wet brake non-engagement by considering the combined effect of surface grooves, film shrinkage, and laminar Navier-Stokes (N-S) equations. The model was used to study drag torque and temperature variation of the wet brakes for different volume flows, dynamic viscosities, and friction pair clearances. The simulation results indicated that the peak torque decreased when the clearance of the friction pair increased. Additionally, the peak torque increased when the volume flow increased and when the cooling liquid dynamic viscosity increased. The model was more accurate than a traditional forecasting system when considering the role of surface grooves and oil film shrinkage in actual working conditions.To improve the characteristics of wet multi-disc brakes(WMDBs),the WMDBs of the drive axles of mining trucks were studied.A model was established to predict the phenomenon of drag characteristics during wet brake non-engagement by considering the combined effect of surface grooves,film shrinkage,and laminar Navier-Stokes(N-S) equations.The model was used to study drag torque and temperature variation of the wet brakes for different volume flows,dynamic viscosities,and friction pair clearances.The simulation results indicated that the peak torque decreased when the clearance of the friction pair increased.Additionally,the peak torque increased when the volume flowincreased and when the cooling liquid dynamic viscosity increased.The model was more accurate than a traditional forecasting system when considering the role of surface grooves and oil film shrinkage in actual working conditions.

关 键 词：WET BRAKE drag TORQUE combined effects MULTI-PARAMETER PREDICTION system 

分 类 号：U463.5[机械工程—车辆工程]