高原环境连续下坡路段制动鼓温度预测模型  

Prediction Model of Brake Drum Temperature on Continuous Downgrade Segments in High-altitude Environment

作　　者：陈立辉[1,2] 郭忠印 CHEN Lihui;GUO Zhongyin(The Key Laboratory of Road and Traffic Engineering,the Ministry of Education,Tongji University,Shanghai 201804,China;College of Civil and Architecture Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]东华理工大学土木与建筑工程学院,南昌330013

出　　处：《北京工业大学学报》2020年第7期772-781,共10页Journal of Beijing University of Technology

基　　金：国家科技支撑计划资助项目(2014BAG05B02)。

摘　　要：为了研究高原环境连续下坡路段制动鼓温升规律,在世界道路协会已有的制动鼓温度预测模型基础上,通过引入海拔高度修正系数,构建了适合高原环境连续下坡路段制动鼓温度理论模型.利用VBOX 3i作为数据采集设备,以东风天龙半挂牵引车为试验车型,以国道G214青海省境内日月山段(最高海拔约3400 m)和巴颜喀拉山段(最高海拔约4800 m)连续下坡为试验路段,通过在制动片中埋入温度传感器的方式,采集了温度预测模型需要的相关试验数据,如试验路段的坡度、坡长,车辆的运行速度,发动机转速,发动机水箱温度,制动器衬片和环境温度等,利用试验数据求得预测模型需要的滚动摩擦因数、对流换热系数和制动力分配系数,根据预测温度与实测温度的对比,温度预测模型的准确性达到94.7%,验证了模型的准确性.修正后的制动鼓温度预测模型满足了大型货车在不同海拔高度的制动器温度预测需求,为高原地区连续下坡路段避险车道的设置提供理论依据.To study the temperature rise law of the brake drum in the continuous downgrade section of the plateau environment,a theoretical model of the brake drum temperature suitable for the continuous downgrade section of the plateau environment was constructed by introducing the altitude correction coefficient.Using the VBOX 3i as the data acquisition equipment,the Dongfeng Tianlong semi-trailer as the experimental vehicle,the continuous downgrade segments in the Bayan Har Mountain(up to about 4800 m above sea level)and Ri-yue Mountain(up to about 3400 m above sea level)on G214 in Qinghai Province as the test sections,by embedding temperature sensors in the brake pad,the relevant parameter data required by the temperature prediction model were collected,such as the slope and length of the test section,the operating speed of the vehicle,the RPM of the diesel engine,the temperature of the diesel engine water tank,and the temperature of brake friction disc and environment.The rolling friction coefficient,heat transfer coefficient and braking force distribution coefficient required by the prediction model were obtained from the experimental data.By comparing the predicted temperature with the measured temperature,the accuracy of the temperature prediction model reaches 94.7%,which verifies the accuracy of the model.The revised brake drum temperature prediction model meets the brake temperature prediction requirements of large trucks at different altitudes,and provides a theoretical basis for the establishment of escape lanes on continuous downgrade sections in plateau areas.

关 键 词：道路工程 连续下坡 发动机制动 鼓式制动器 热衰退 预测模型 高原环境 

分 类 号：U491.2[交通运输工程—交通运输规划与管理] U492.8[交通运输工程—道路与铁道工程]