摘要
轴承套圈的不对中和剥落是影响齿轮-转子-轴承系统振动特性的典型误差和故障。为了研究外圈不对中和剥落对系统的耦合影响,有必要对含不对中和剥落的齿轮-转子-轴承系统振动特性进行分析。首先,考虑外圈不对中和剥落,计算了轴承的五自由度非线性恢复力。然后,基于轮齿承载接触分析(LTCA)方法,计算了啮合刚度并且建立了直齿轮副的动力学模型。在此基础上,基于切片法建立了花键的等效刚度模型。最后,通过将轴承的恢复力模型、直齿轮副的动力学模型和花键的等效刚度模型与转子系统的有限元模型耦合,建立了齿轮-转子-轴承系统的动力学模型。分析表明,只有剥落位于承载区时,才会对轴承接触力、接触角和系统振动特性产生影响。外圈的不对中导致轴承的承载区范围增大,并使得剥落对系统产生影响的概率增加。
Misalignment and spalling of bearing rings are typical errors and faults that significantly influence the vibration characteristics of a gear-rotor-bearing system.In order to investigate the coupling effects of misalignment and spalling,it is necessary to analyze the vibration characteristics of a gear-rotor-bearing system with misalignment and spalling.Firstly,considering the outer ring misalignment and spalling,the 5-DOF nonlinear bearing restoring force is calculated.Then,based on the loaded tooth contact analysis(LTCA)method,the meshing stiffness is calculated,and the dynamic model of the spur gear pair is established.Furthermore,the equivalent stiffness model of the spline is established based on the slicing method.Finally,by coupling the bearing restoring force model,the dynamic model of the spur gear pair,and the equivalent stiffness model of the spline with the finite element(FE)model of the rotor system,a dynamic model of a gear-rotor-bearing system is developed.The analysis shows that the contact force,contact angle,and system vibration are only affected when the spalling is located in load-bearing areas.The misalignment of the outer ring leads to the increase of the load-bearing area range of the bearing and the influence probability of the spalling on the system.
作者
徐宏阳
赵翔
马辉
罗忠
韩清凯
闻邦椿
XU Hong-yang;ZHAO Xiang;MA Hui;LUO Zhong;HAN Qing-kai;WEN Bang-chun(School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China;Key Laboratory of Vibration and Control of Aero-Propulsion System(Ministry of Education),Northeastern University,Shenyang 110819,China)
基金
Project(2021YFB2011100)supported by the National Key Research and Development Program of China
Project(2020YFB2007802)supported by the National Key Research and Development Program of China
Project(11972112)supported by the National Natural Science Foundation of China。
关键词
球轴承
不对中
剥落
振动特性
齿轮-转子-轴承系统
ball bearing
misalignment
spalling
vibration characteristic
gear-rotor-bearing system
