重型商用车后桥搅油损失分析和优化  

Oil Loss Analysis and Optimization of Rear Axle Differential Gear for Heavy Commercial Vehicles

作　　者：毕道坤 陆增俊 唐立国 唐荣江[2] 顾昱彬 BI Dao‐kun;LU Zeng‐jun;TANG Li‐guo;TANG Rong‐jiang;GU Yu‐bin(Commercial Vehicle Technology Center of Dongfeng Liuzhou Automobile Co.,Ltd.,Liuzhou Guangxi 545005,China;School of Mechanical and Electrical Engineering,Guilin University of Electronic Science and Technology,Guilin Guangxi 541010,China)

机构地区：[1]东风柳州汽车有限公司商用车技术中心,广西柳州545005 [2]桂林电子科技大学机电工程学院,广西桂林541010

出　　处：《科技和产业》2021年第7期306-310,共5页Science Technology and Industry

基　　金：国家自然科学基金(52065013);广西青年科学基金(2018GXNSFBA281012);广西创新驱动发展专项资金项目(桂科AA19182004)。

摘　　要：商用车后桥传递效率是燃油经济性的主要影响因素,也是产品竞争力的重要评价指标。现有的商用车传递效率损失较大,后桥(驱动桥)搅油损失是一个重要影响因素。首先通过试验排除注油量的影响,然后基于CFD计算和实验方法对车后桥的流场进行分析,设计出"内置导流板"和"桥壳变形"两种方案以改变流场并进行仿真。结果显示,"内置导流板"功率搅油损失降低14.7%,"桥壳变形"降低22.1%。因此"桥壳变形"的优化结果更佳。最后通过与原始模型的试验对比证明优化后的车后桥传递效率提高近1%,为工程应用提供了可靠的优化方案。The rear axle transfer efficiency of commercial vehicle is the main influence factor of fuel economy and an important evaluation index of product competitiveness.The current commercial vehicle transfer efficiency loss is large,mainly because of the rear bridge oil loss.The influence of oil injection was excluded through experiments,and then the flow field of the rear axle was analyzed based on CFD calculation and experimental method.Two schemes,“built‐in guide plate”and“axle housing deformation”,were designed to change the flow field and were simulated.The results show that the power loss of“built‐in guide plate”is reduced by 14.7%,and the deformation of“axle housing”is reduced by 22.1%,so the optimization result of“axle housing deformation”is better.Finally,by comparing with the original model,it is proved that the transfer efficiency of the optimized vehicle rear axle can be improved by nearly 1%,which provides a reliable optimization scheme for engineering application.

关 键 词：流场分析 后桥 搅油损失 实验研究 功率损失 

分 类 号：U463.22[机械工程—车辆工程]