润滑作用下含齿距偏差齿轮副内激励及动态特性分析  

Effect of Tooth Lubrication on the Internal Excitation and Dynamic Characteristics of Gear Pairs with Pitch Deviation

作　　者：曾先光 周杨 段林涛[2] 王利明[2] ZENG Xian-guang;ZHOU Yang;DUAN Lin-tao;WANG Li-ming(CRRC Nanjing Puzhen Co.,Ltd.,Nanjing Jiangsu 210031,China;State Key Laboratory of Mechanical Transmission for Advanced Equipment,Chongqing University,Chongqing 400044,China)

机构地区：[1]中车南京浦镇车辆有限公司,江苏南京210031 [2]重庆大学高端装备机械传动全国重点实验室,重庆400044

出　　处：《机电产品开发与创新》2024年第6期107-112,共6页Development & Innovation of Machinery & Electrical Products

基　　金：重庆市自然科学基金面上项目,轮齿随机误差激励下齿轮传动系统早期故障动态建模与解耦提取方法研究(CSTB2022NSCQ-MSX1243)。

摘　　要：针对含齿距偏差齿轮副粗糙啮合界面内激励机理及动力学演变规律不清问题,本文建立了考虑齿轮表面微观形貌的混合弹流润滑接触模型。该模型厘清了齿距偏差和弹流润滑接触状态对时变啮合刚度、载荷分布等的耦合作用规律及其迭代关系,得到了粗糙啮合界面膜厚、压强分布规律;随后建立了6自由度齿轮动力学模型,究明了齿轮系统的动力学演变规律,获取了轮齿润滑对齿轮副动力学特性的影响规律。结果表明:轮齿润滑能够显著抑制由于齿距偏差引起的啮合刚度冲击现象,减小齿轮副啮合冲击力。与此同时,齿轮副的随机振动冲击现象削弱,有效提升了齿距偏差齿轮副的传动稳定性。该方法可以有效预测与齿距偏差大小相关的不同精度齿轮副的振动特性,为齿轮传动系统的服役性能动态调控提供一定的理论指导。To address the unclear excitation mechanism and dynamic evolution of gear pairs with tooth profile deviations in rough meshing interfaces,the mixed elasto-hydrodynamic lubrication model was established considering the micro-topography of gear tooth surface.The coupling relationship and iteration process between tooth profile deviations,lubrication contact states,and time-varying mesh stiffness(TVMS),load distribution were clarified to obtain the film thickness and pressure distribution in the rough meshing interface.Subsequently,a 6-degree-of-freedom gear dynamic model was established to investigate the dynamic evolution of the gear system and understand the effect of gear lubrication on the dynamic characteristics.Results show that gear lubrication can significantly suppress the mesh stiffness impact caused by tooth pitch deviation and reduce the mesh impact force.Meanwhile,the random vibration impact phenomenon of the gear pair is weakened,effectively improving the transmission stability of gear pairs with pitch deviation.This method can effectively predict the vibration characteristics of gear pairs with different precision levels related to pitch deviation,providing theoretical guidance for the dynamic control of the operational performance of gear transmission systems.

关 键 词：齿轮动力学 弹流润滑 齿距偏差 动态特性 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]