摘要
基于行星轮系作为自动变速器(automatic transmissions,简称AT)动力传递的核心部件,在传动效率、传动比范围和承载能力方面具有明显优势,提出了基于循环功率流的变速器行星轮系效率分析方法。首先,基于超图理论和变速器动力传递路线图,建立4排行星轮系的三角形超图;其次,基于行星轮系自旋转理论,建立齿轮啮合摩擦损失和轴承摩擦损失模型,以及变速器2挡位的转速、转矩矩阵;最后,分析了在无损失和考虑2种损失状态下2挡位节点功率和传动比以及其他挡位的循环功率和效率,并对9挡位自动变速器(nine-speed AT,简称9AT)的输出行星排进行实验验证。实验结果表明:考虑2种损失状态下,3挡位行星轮系的动力传递齿圈输出功率损失最大,约占该齿圈总输出功率的16%;4挡位的循环功率与输入功率的比值增加最大,增大了4%;不同转速和转矩下效率的最大误差为4.62%。可见,采用所提出方法能够准确有效地得到变速器工作时的功率损失和效率。
As the core component of automatic transmissions(AT)power transmission,the planetary wheel system has obvious advantages in transmission efficiency,ratio range and load carrying capacity,and its power flow analysis plays an important role in the optimal design.In this paper,an efficiency analysis method of trans⁃mission planetary gear train based on circulating power flow is proposed.Firstly,the triangular hypergraph of four-row planetary gear train is established based on the hypergraph theory and the transmission power transmis⁃sion route map.Secondly,based on the self-rotation theory of planetary gear train,the models of gear meshing friction loss and bearing friction loss are established,as well as the speed and torque matrix of the second gear of transmission.Finally,the node power and transmission ratio of the second gear as well as the cyclic power and efficiency of other gears under the condition of no loss and considering two losses are analyzed,and the output planetary gear of the 9AT transmission is tested and verified.The results show that the output power loss of the power transmission ring gear of the three-gear planetary gear train is the largest after considering the two losses,accounting for about 16%of the total output of the ring gear;The ratio of cyclic power to input power in the fourth gear increases by 4%;The experiment shows that the maximum error of efficiency is 4.62%at different speeds and torques.This method can accurately and effectively obtain the power loss and efficiency of the trans⁃mission during operation.
作者
吴石
赵成睿
于广滨
周熠阳
徐田恬
WU Shi;ZHAO Chengrui;YU Guangbin;ZHOU Yiyang;XU Tiantian(School of Mechanical and Power Engineering,Harbin University of Science and Technology Harbin,150080,China;School of Mechatronics Engineering,Harbin Institute of Technology Harbin,150001,China)
出处
《振动.测试与诊断》
北大核心
2025年第1期18-25,197,共9页
Journal of Vibration,Measurement & Diagnosis
基金
国家重点研发计划资助项目(2019YFE0121300)。
关键词
9挡位自动变速器
行星齿轮系
功率流
循环功率
传动效率
nine-speed automatic transmission
planetary gear train
power flow
cycle power
transmission efficiency
