汽车后桥准双曲面齿轮搅油阻力优化  

Optimization of Churning Resistance of Hypoid Gear for Automobile Rear Axle

作　　者：沈云啸 徐劲力 朱继伟[2] 杨文超 Shen Yunxiao;Xu Jinli;Zhu Jiwei;Yang Wenchao(SAIC-GM-Wuling Automobile Co.,Ltd.,Liuzhou 545000,China;School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]上汽通用五菱汽车股份有限公司,广西柳州545000 [2]武汉理工大学机电工程学院,湖北武汉430070

出　　处：《机械传动》2021年第9期170-175,共6页Journal of Mechanical Transmission

基　　金：广西区科技厅广西创新驱动发展专项资金项目(桂科AA19182003);柳州市科技计划项目(2017AA10102)。

摘　　要：以降低某汽车后桥准双曲面齿轮搅油阻力为目的,基于VOF(Volume of Fluid)两相流模型及标准k-ε湍流模型建立了汽车后桥三维数值模型,分析了后桥准双曲面齿轮搅油功率损失机理;提出了将准双曲面齿轮由螺栓连接改为去除螺栓结构并在其两侧面增加挡板以减少搅油阻力的方法。通过Fluent仿真,对改进前后汽车后桥准双曲面齿轮搅油阻力进行了分析,与经验公式进行对比并进行了试验验证。结果表明,仿真分析及试验结果有较好的一致性;经验公式与仿真结果吻合度较高但小于试验值;适当的结构改进及挡油板的加入可显著降低后桥搅油阻力;随着转速升高,阻力减少数值越大,最高减阻可达35.9%。The purpose of is to discuss an accessible approach to reduce the churning resistance of hypoidgear of automobile rear axle.A CFD model of automobile rear axle is conducted based on VOF and standard k-εmodel,the churning power loss mechanism of rear axle hypoid gear is analyzed.The method of removing thebolt structure and adding baffle plates on both sides of hypoid gear is proposed to reduce the churning resis-tance.Through Fluent simulation,the churning resistance before and after improvement rear axle hypoid gear isanalyzed,and compared with the empirical formula,and verified by experiments.The results show that,resultsof simulation analysis and test are in good agreement,the empirical formula is in good agreement with the simu-lation result,but less than the experimental value,the proper structural improvement and addition of oil bafflecan significantly reduce the rear axle churning resistance,as the speed increases,the resistance reduction val-ue increases,the maximum drag reduction can reach 35.9%.

关 键 词：VOF 后桥 准双曲面齿轮 搅油阻力 

分 类 号：U463.2[机械工程—车辆工程]