封闭差动齿轮系统振动传递路径贡献度分析  

Contribution analysis of vibration transfer paths in encased differential planetary train

作　　者：李苗苗[1] 刘钦文 杨杰 陈蔚芳[1] 朱如鹏[1] LI Miaomiao;LIU Qinwen;YANG Jie;CHEN Weifang;ZHU Rupeng(National Key Laboratory of Science and Technology on Helicopter Transmission,College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机电学院直升机传动技术国家重点实验室,南京210016

出　　处：《航空动力学报》2020年第8期1676-1686,共11页Journal of Aerospace Power

基　　金：国家重点研发计划(2018YFB2001500)。

摘　　要：针对封闭差动齿轮系统在减振降噪方面的需求,提出了一种从传动系统运动分析的角度出发确定其振动传递路径并分析各路径贡献度的研究方法。以齿轮啮合时产生的时变啮合刚度和误差等效位移作为内部激励,分析封闭差动齿轮系统的振动传递路径,基于功率流法分析各振动传递路径的贡献度。研究结果表明:振动接受结构输出轴、差动级太阳轮和封闭级行星轮在最大共振频率下对应的最大共振幅值分别为14 010、3 314 (m/s^2)/Hz和95 180 (m/s^2)/Hz;包含封闭级内齿圈和输出轴的路径4在差动级外啮合激励、差动级内啮合激励、封闭级外啮合激励和封闭级内啮合激励对应的振动传递路径贡献度百分比分别为77.7%、77.5%、78.6%和69.9%,封闭级内齿圈和输出轴在封闭差动齿轮系统振动传递中起主要作用。In response to the requirements of the encased differential planetary train in terms of vibration reduction and noise reduction, a method for contribution analysis of vibration transfer paths was proposed. Taking the time-varying meshing stiffness and error equivalent displacement generated during gear meshing as internal excitation, the vibration transfer path of the encased differential planetary train was analyzed, and the contribution of each vibration transfer path was discussed based on the power flow method. Results showed that, the vibration receiving structure including the output shaft, the differential stage sun gear and the encased stage star gear at the maximum resonance frequency corresponded to the maximum common amplitude values of 14 010,3 314,95 180(m/s^2)/Hz, respectively. According to the conclusion, the path 4 including the encased stage ring gear and the output shaft had a vibration transfer path contribution percentage of 77.7%, 77.5%, 78.6% and 69.9%, respectively, under the differential stage external meshing excitation, differential stage internal meshing excitation, encased stage external meshing excitation and encased stage internal meshing excitation. The encased stage ring gear and output shaft play a major role in the vibration transmission of the encased differential planetary train.

关 键 词：贡献度 封闭差动齿轮系统 传递路径分析 功率流 振动响应 

分 类 号：V232.8[航空宇航科学与技术—航空宇航推进理论与工程] TH132.425[机械工程—机械制造及自动化]