动态对流换热条件下液压盘式制动器传热性能预测  

Prediction of Heat Transfer Performance of Hydraulic Disc Brake Under Dynamic Convective Heat Transfer

作　　者：张玲芬 ZHANG Ling-fen(Yantai Automotive Engineering Career Academy,Yantai,Shandong 265500)

机构地区：[1]烟台汽车工程职业学院,山东烟台265500

出　　处：《液压与气动》2018年第11期113-118,共6页Chinese Hydraulics & Pneumatics

摘　　要：液压盘式制动是目前汽车上应用最多的制动类型,制动盘的传热性能对制动可靠性有重要的影响。充分考虑动态对流换热条件,根据边界层理论推导出沿径向变化的表面换热系数,基于有限元法对盘式制动器的传热特性进行了计算,得出制动盘的三维瞬态温度场和摩擦半径内节点温度的变化规律。通过台架试验验证可知,考虑风动因素能够使边界条件更符合真实情况,该传热性能预测方法具有较高的计算精度。Hydraulic disc brake is the most widely used brake type nowadays.The heat transfer performance of brake disc has a key influence on reliability of brake.Considering dynamic convection heat transfer conditions,we deduce the surface heat transfer coefficient along radial direction according to the boundary layer theory.The heat transfer characteristics of disc brake are calculated based on the finite element method,and the three dimensional transient temperature field of the disc and change laws of node temperature within friction radius are obtained.It is proved by a bench test that considering wind dynamic factors can make the boundary conditions more accurate,and the prediction method of the heat transfer performance has a higher calculation precision.

关 键 词：盘式制动 传热 对流换热 有限元 温度场 

分 类 号：TH137[机械工程—机械制造及自动化] TH113