尾减速器轴承预紧对锥齿轮接触印痕和齿隙的影响规律研究  

Research on the Influence of Bearing Preload of Tail Reducers on Contact Marks and Backlash of Bevel Gears

作　　者：李添良 邓明明 何志良 何海雨 唐进元[3] Li Tianliang;Deng Mingming;He Zhiliang;He Haiyu;Tang Jinyuan(AECC Zhongchuan Transmission Machinery Co.,Ltd.,Changsha 410200,China;Military Representative Office of Naval Equipment Department in Changsha,Zhuzhou 412000,China;State Key Laboratory of Precision Manufacturing for Extreme Service Performance,Central South University,Changsha 410083,China)

机构地区：[1]中国航发中传机械有限公司,湖南长沙410200 [2]海装驻长沙地区军事代表室,湖南株洲412000 [3]中南大学极端服役性能精准制造全国重点实验室,湖南长沙410083

出　　处：《机械传动》2024年第6期14-21,共8页Journal of Mechanical Transmission

基　　金：国防基础科研计划(JCKY202013B006)。

摘　　要：尾减速器是直升机传动系统的重要部件,轴承预紧是尾减速器装配的关键环节,直接影响直升机尾旋翼的平稳性、寿命及噪声。根据轴承支撑构型建立预紧螺栓的受力模型,得到螺栓的拧紧力矩及施加在支撑面上的轴向力;基于受力关系建立尾减速器轴承预紧有限元分析模型,根据分析结果提取了锥齿轮副的安装误差,处理得到:弧齿锥齿轮副的齿面间隙随着力矩的增大而减小,印痕位置随着力矩的增大有逐渐向大端移动的趋势;试验结果与有限元计算结果吻合性较强,方法可进一步推广到其他类型减速器中。The tail gear reducer is an important component of the helicopter transmission system,and bearing preloading is a key link in the assembly of the tail gear reducer,which directly affects the stability,service life,and noise of the helicopter tail rotor.According to the bearing support configuration,a force model of the preloaded bolt is established to obtain the tightening torque of the bolt and the axial force applied to the support surface;based on the stress relationship,a finite element analysis model for the preloading of the tail reducer bearing is established,and the installation error of the bevel gear pair is extracted according to the analysis results.The processing results show that the tooth surface clearance of the spiral bevel gear pair decreases with the increase of the torque,and the imprint position gradually moves towards the large end with the increase of the torque;the experimental results are in good agreement with the finite element calculation results,and the method can be further extended to other types of reducers.

关 键 词：减速器 轴承预紧 弧齿锥齿轮 接触印痕 齿隙 

分 类 号：V275.1[航空宇航科学与技术—飞行器设计]