自动变速箱内置润滑换挡齿轮泵结构优化设计  

Optimizing Design of the Structure of Interior Lubrication Shift Gear Pump in Automatic Transmission

作　　者：姚方方 马海英 

机构地区：[1]黄河交通学院,河南焦作454950

出　　处：《机械传动》2017年第5期86-92,共7页Journal of Mechanical Transmission

基　　金：河南省科技攻关计划项目(132102210215)

摘　　要：液压齿轮泵是液力自动变速箱的重要组成单元,其为自动换挡系统和润滑冷却系统提供油液。以液力自动变速箱设计为依托,根据径向并联外啮合多齿齿轮泵的结构特点,针对其工作过程中遇到的内部困油现象进行研究,分析形成的原因和解决办法。对齿轮泵进行结构优化设计,提出偏置卸荷槽设计方案,并对其尺寸和位置进行分析,基于CFD对3种不同形式齿轮泵结构工作流场进行对比分析,并搭建试验台架,对优化设计后齿轮泵性能进行试验研究,以验证理论分析的准确性。结果可知,当采用偏置开设卸荷槽时,设计合适的参数可有效改善困油现象,并且齿轮泵的容积效率得到提高;通过试验测试对比容积效率可知,结构优化设计及所搭建数学模型的准确性与可靠性,为此类变速箱齿轮泵的设计提供参考依据。The gear pump is an important component of the hydrodynamic automatic transmission, which provides oil for the automatic shift system and lubrication and cooling system. Based on hydraulic automatic transmission design, according to the structural characteristics of the radial outer engaging in parallel multi - tooth gear pump, an internal study for trapped oil phenomena encountered in the process of their work, the cau- ses and solutions are analyzed. Through gear pump structure optimization, the bias unloading groove design is proposed, and analysis of its size and location is carried out. Based on CFD, the three different forms of gear pump structure work flow field are analyzed and compared, and test bench is built for experimental study of the gear pump performance after the optimization design to verify the accuracy of the analysis. The results show that, when the bias unloading opening slot design appropriate parameters can effectively improve the phenome- non of trapped oil, gear pump and volumetric efficiency is improved. By comparing experimental test of volu- metric efficiency shows accuracy and reliability of the structural optimization design and built mathematical model, a reference for such transmission gear pump design is provided.

关 键 词：齿轮泵 液力自动变速箱 困油 卸荷槽 容积效率 模型 试验 

分 类 号：TH137.51[机械工程—机械制造及自动化]