重型非公路湿式制动器带排特性预测体系  

Drag characteristic prediction system of wet brakes with heavy-duty and off-road

作　　者：罗天洪[1] 李富盈[1] 李春宏 黄兴刚 

机构地区：[1]重庆交通大学机电与汽车工程学院,重庆400074 [2]重庆大江信达车辆股份有限公司,重庆401320

出　　处：《华中科技大学学报（自然科学版）》2014年第5期47-51,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51275537);中央高校基本科研业务费专项资金资助项目(CDJZR10280006)

摘　　要：为了提高湿式多片盘式制动器的运行和制动特性,以轮式挖掘机驱动桥湿式多片式盘式制动器为研究对象,针对湿式制动器在非制动运行过程中带排特征现象,通过考虑表面沟槽作用、油膜收缩现象和层流N-S方程,建立湿式制动器带排特性预测体系,研究在不同体积流量、动力黏度和摩擦副间隙下湿式制动器带排转矩和温度变化规律.分析结果表明:在摩擦副间隙为变量情况下,带排特征预测模型摩擦副间隙越大,带排转矩峰值越低;在体积流量为变量情况下,带排转矩预测模型体积流量越大,带排转矩峰值越大;在冷却液动力黏度为变量情况下,带排转矩预测模型冷却液动力黏度越大,带排转矩峰值越大.The wet multiple of disc brake （WMDB） in mining engineering truck＇s drive axle was stud- ied to enhance the characteristics of WMDB. A prediction system specific to the drag characteristics phenomenon during in wet brake non-engagement was established, considering the surface grooves effect, film shrinkage and laminar N-S equations as factors. The prediction system was built up to un- derstand drag torque and temperature＇s variation of wet brake at different volume flow, dynamic vis- cosity and friction pair clearance. The results indicated that when the friction pair gap is under variable circumstance, the larger friction pair gap of predictive models feature, the lower peak torque; when the volume is variable, the peak torque rises with an increasing volume flow of torque prediction model; when the cooling liquid viscosity is dynamic, the peak torque increases as the torque prediction model coolant dynamic viscosity is greater.

关 键 词：挖掘机 湿式制动器 带排特性 转矩 温度 预测 

分 类 号：TH117.1[机械工程—机械设计及理论] U461.3[机械工程—车辆工程]