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作 者:金宸 刘城[1,2] 闫清东[1,3] 魏巍 JIN Chen;LIU Cheng;YAN Qing-dong;WEI Wei(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081;National Key Lab of Vehicular Transmission,Beijing Institute of Technology,Beijing 100081;Advanced Technology Research Institute,Beijing Institute of Technology,Jinan,Shandong 250300;Chongqing Innovation Center,Beijing Institute of Technology,Chongqing 401135)
机构地区:[1]北京理工大学机械与车辆学院,北京100081 [2]北京理工大学车辆传动重点实验室,北京100081 [3]北京理工大学前沿技术研究院,山东济南250300 [4]北京理工大学重庆创新中心,重庆401135
出 处:《液压与气动》2024年第3期181-188,共8页Chinese Hydraulics & Pneumatics
摘 要:液力变矩器是液力传动的重要元件,以黏性油液为工作介质转换并传递功率,具有无级变速变矩、自动适应等优良传动特性。由于工作介质的高速流动,对各叶轮产生较大的轴向动负荷,同时其内部不同旋转域间存在着较大不平衡面积,使得液力变矩器在工作过程中存在较高的轴向载荷。以某有效直径为420 mm的液力变矩器为研究对象,对带泄漏腔体流域的整体进行三维数值模拟,并分析各个工作轮的轴向力构成,搭建轴向力测试试验台进行试验验证。试验结果表明,三维流场仿真能够较准确地计算轴向力。由仿真分析可知,泄漏区内工作液体的作用所产生的轴向力占比较大;3个叶轮中,涡轮轴向力最小,约为泵轮和导轮的1/5,泵轮轴向力始终使泵轮接近导轮,导轮所受到的轴向力始终使导轮接近泵轮;随着传动比增大,泵轮轴向力先增大后减小,在i=0.3工况时泵轮轴向力最大,导轮轴向力降低,在i=0工况时最大。Hydraulic torque converter is an important component of hydraulic transmission.It uses viscous oil as the working medium to convert and transmit power.It has excellent transmission characteristics such as continuously variable torque conversion and automatic adaptation.Due to the high-speed flow of the working medium,a large axial dynamic load is generated on each impeller,and at the same time,there is a large unbalanced area between different rotating domains inside,so that the torque converter has a high axial load during the working process.load.A torque converter with an effective diameter of 420 mm is taken as the research object,and a three-dimensional numerical simulation is carried out on the whole with a leaking cavity,and the axial force composition of each working wheel is analyzed,and an axial force test bench is built for the test.The test results show that the three-dimensional flow field simulation can calculate the axial force more accurately.It can be seen from the simulation analysis that the axial force generated by the action of the working liquid in the leakage area accounts for a large proportion.Among the three impellers,the axial force of the turbine is the smallest,which is about one-fifth of the pump wheel and the guide wheel.The axial force of the pump wheel always makes the pump wheel close to the guide wheel,and the axial force on the guide wheel always makes the guide wheel close to the pump.As the transmission ratio increases,the axial force of the pump wheel first increases and then decreases,and the axial force of the pump wheel is the largest when i=0.3;the axial force of the guide wheel decreases,and it is the largest when i=0.
分 类 号:TH137[机械工程—机械制造及自动化]
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