考虑液体黏性传动的湿盘制动器ATF温度场的解析模型
赵波1,2，王梓羽1,2，惠源1,2
（1.四川大学 机械工程学院，四川 成都 610065；2.先进制造技术四川省重点实验室，四川 成都 610065）
摘要：湿盘式制动器是重型车辆制动系统的核心部件，对车辆安全性具有关键影响。本文以制动摩擦副间隙的冷却液压油（ATF）为研究对象，考虑液体摩擦阶段中的液体黏性传动（HVD）特征，由泊肃叶流动方程和能量方程分别建立了湿盘式制动器ATF径向流动速度和稳态轴向温度分布的理论模型，并获得显式解析解。理论预测表明，ATF径向速度和轴向温度分别呈抛物线和四次方分布。以该模型为基础，利用某实际矿车湿盘式制动器设计参数进行了初步的理论温度预测和对比。该模型有潜力用于ATF沿轴向和径向的非稳态温度场的理论预测。
关键词：湿盘式制动器；液体黏性传动；解析解；热流体动力学；速度分布；温度预测
中图分类号：TH243；U461.1 文献标志码：A doi：10.3969/j.issn.1006-0316.2019.12.003
文章编号：1006－0316 (2019) 12－0015－08
2D Analytical Solutions of Thermal Behavior for Automotive Transmission Fluid Considering Hydroviscous Drive in Wet Brakes
ZHAO Bo1,2，WANG Ziyu1,2，HUI Yuan1,2
( 1.School of Mechanical Engineering, Sichuan University, Chengdu 610065, China;2.Sichuan Provincial Key Laboratory of Advanced Manufacturing Technology, Chengdu 610065, China )
Abstract：The wet multi-disk brake is the core braking component of heavy-duty vehicles, which has a significant influence on the safety of the vehicles. On the basis of the Poiseuille equation, the theoretical models of the radial velocity distribution and the axial temperature for the automotive transmission fluid (ATF) of the wet multi-disk brakes are established respectively, and the corresponding closed-form analytical solutions are derived considering hydroviscous drive (HVD) in the fluid lubrication braking phase,. It turns out that the temperature theoretical solution suggested might have the potential to be extended to predict 2D analytical solutions of the radial and axial temperature field under the non-steady state braking actuations of wet brakes. The theoretical results show that the radial velocity along the ATF thickness is parabolic and the axial temperature along the ATF thickness is quadratic. Finally, on the basis of the analytical solutions, a preliminary theoretical temperature prediction based on the key design parameters of the multiple disk wet brakes in a bogie are performed.
Key words：wet multi-disk brake；hydroviscous drive (HVD)；analytical solutions；thermohydrodynamic analysis；velocity distribution；thermal analysis
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收稿日期：2019－09－25
作者简介：赵波（1972－），吉林长岭人，工学博士，教授，主要研究方向为车辆湿盘式制动器性能分析和传热传质统一场理论。
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