液力变矩器单向离合器阻力矩及流场特性研究  

Resistance Torque and Flow Field Characteristics of One-Way Clutch for Torque Converter

作　　者：刘城[1,2] 柳景灿 郭猛 闫清东[1,3] 魏巍 刘世琦[1] 王浩源 LIU Cheng;LIU Jingcan;GUO Meng;YAN Qingdong;WEI Wei;LIU Shiqi;WANG Haoyuan(School of Mechanical and Vehicle Engineering,Beijing Institute of Technology,Beijing 100081,China;Yangtze River Delta Research Institute(Jiaxing),Beijing Institute of Technology,Jiaxing,Zhejiang 314000,China;Frontier Technology Research Institute(Ji’nan),Beijing Institute of Technology,Ji’nan,Shandong 250307,China;Chongqing Innovation Center,Beijing Institute of Technology,Chongqing 401122,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]北京理工大学长三角研究院(嘉兴),浙江嘉兴314000 [3]北京理工大学前沿技术研究院(济南),山东济南250307 [4]北京理工大学重庆创新中心,重庆401122

出　　处：《北京理工大学学报》2025年第4期391-401,共11页Transactions of Beijing Institute of Technology

基　　金：中国博士后科学基金资助项目(2023M730239);国家自然科学基金青年科学基金资助项目(51805027)。

摘　　要：作为液力变矩器的关键部件,单向离合器可实现变矩器工况耦合器工况的相互切换,对综合式液力变矩器传动性能发挥和可靠运行至关重要.为探究单向离合器转矩性能和流动特性,针对液力变矩器用单向离合器,采用CFD数值分析和实验测试相结合的方法,开展了单向离合器阻力矩及流场特性的研究,分析了单向离合器在不同环境温度下的流场状态分布特征和搅油转矩变化规律,构建了外环搅油转矩与转速、环境温度的映射关系.研究结果表明:单向离合器搅油转矩与内部油液的压力、流速、涡量均相关,流场状态参数数值基本随温度的降低而升高,尤其在外环型面附近最为明显;在外环转速为800~2200 r/min时,外环搅油转矩为6~26 N·m.此外,外环2000 r/min时其型面上最高压力为200 kPa,表面流体流速达20 m/s.As a key component of the torque converter,one-way clutch can switch the modes between torque converter and coupling conditions,playing a crucial role in the transmission performance and reliable operation of the integrated torque converter.To investigate the torque performance and flow characteristics of the one-way clutch,combining the CFD numerical analysis,experiments and tests,an effective method was arranged to study the resistance torque and flow field characteristics of the one-way clutch for torque converters.In this study,the flow field distribution characteristics and oil stirring torque variations of the one-way clutch were analyzed under different ambient temperatures,establishing a mapping relationship among the external ring oil stirring torque,rotational speed,and ambient temperature.The results show that the oil stirring torque of the one-way clutch is related to the pressure,flow velocity and vorticity of the internal oil,and the values of flow field parameters are increasing generally with the temperature decreasing,representing especially evidence near the external ring profile.When the external ring speed is between 800~2200 r/min,the external ring oil stirring torque is usually in the range from 6 to 26 N·m.Additionally,at an external ring speed of 2000 r/min,the maximum pressure on its profile can reach 200 kPa,and the surface fluid flow velocity can reach 20 m/s.

关 键 词：单向离合器 计算流体力学 搅油转矩 流场特性 

分 类 号：TH133.4[机械工程—机械制造及自动化]