• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (14): 159-168.doi: 10.3901/JME.2018.14.159

• 运载工程 • 上一篇    下一篇

热负荷特性下的分动器动力传递特性研究

王钰明1,2, 王其东1, 陈黎卿3, 胡冬宝3   

  1. 1. 合肥工业大学机械与汽车工程学院 合肥 230009;
    2. 南通大学交通学院 南通 226019;
    3. 安徽农业大学工学院 合肥 230036
  • 收稿日期:2017-11-03 修回日期:2018-04-10 出版日期:2018-07-20 发布日期:2018-07-20
  • 通讯作者: 王其东(通信作者),男,1964年出生,博士,教授,博士研究生导师。主要研究方向为汽车底盘集中控制。E-mail:qidongw@hfut.edu.cn
  • 作者简介:王钰明,男,1986年出生,博士研究生。主要研究方向为分动器动力学控制。E-mail:wangyuming@ntu.edu.cn
  • 基金资助:
    国家自然科学基金(51305004)、江苏省高校自然基金(16KJB580006)、南通市科技计划(MS22015102)和江苏省大学生创新训练计划(201710304079Y)资助项目。

Research on Transfer Case Transmission Power of Heat Load Characteristics

WANG Yuming1,2, WANG Qidong1, CHEN Liqing3, HU Dongbao3   

  1. 1. School of Mechanical and Automobile Engineering, Hefei University of Technology, Hefei 230009;
    2. School of Transportation, Nantong University, Nantong 226019;
    3. College of Engineering, Anhui Agricultural University, Hefei 230036
  • Received:2017-11-03 Revised:2018-04-10 Online:2018-07-20 Published:2018-07-20

摘要: 分动器作为智能四驱汽车的关键部件,关于其性能研究较多从机械传动角度考虑,没有考虑动力传动中摩擦生热的影响。针对这一问题,首先建立基于热负荷特性作用下的分动器力学模型;接着基于Matlab/Simulink软件建立性能仿真模型,分析结果表明热负荷对分动器摩擦片的摩擦因数以及润滑油黏度的影响较大;在此基础上,构建分动器试验平台,获得热负荷条件下总转矩和转矩响应时间的变化规律与仿真值基本保持一致,验证了所建模型的正确性。最后探明峰值黏性转矩约等于峰值总转矩的1/3,达到峰值总转矩需要0.3 s左右;在热负荷条件下,不同摩擦片数和不同压力对所能传递的转矩起决定性作用,不同油槽的宽度对黏性转矩影响较大,对粗糙转矩基本上不起作用。通过对比分析热负荷条件下有无沟槽的分动器传递转矩变化情况,说明了热负荷在分动器工作过程中的重要作用,获得了分动器接合过程中工作特性的变化规律,为分动器的设计提供了理论依据。

关键词: 动力传递, 多片式离合器, 分动器, 热负荷, 试验测试

Abstract: As one of the essential components of intelligent four-wheel drive, transfer case has been studied thoroughly in the area of mechanical drive in the past. However, its friction heat during the transmission of power is rarely discussed. In our works, we construct a model of transfer case based on heat load characteristics. Then, a performance simulation model in Matlab/Simulink is built, which shows that heat load has a great impact on frictional coefficient and viscosity of lubricating oil of transfer case. Based on the above inspection, a test platform for transfer case is constructed, and we find out that the relation between total torque and torque response time under heat load is consistent with the theoretical result. The peak viscous torque is one thirds of the peak total torque, and it costs about 0.3 seconds to reach the peak total torque. The number of friction plate and the pressure play major roles to determine transferable torque. The widths of sumps, while affect viscous torque greatly, do not affect asperity torque as much. The difference between transferable torques of transfer case with and without trenches under heat load is analyzed, and we find the important role of heat load in the working process of transfer case and how its operating characteristic varies during connecting process, which can provides a theoretical basis for the designing of transfer case.

Key words: experimental test, multi-plate clutch, power transfer, thermal load, transfer case

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