织物衬垫磨损对自润滑关节轴承动力学的影响  

Effects of the Wear of Fabric Liner on Self-Lubricating Joint Bearings Dynamics

作　　者：郝秀红[1] 田润威 焦伟 朱恒辉 HAO Xiuhong;TIAN Runwei;JIAO Wei;ZHU Henghui(School of Mechanical Engineering,Yanshan University,Qinghuangdao 066004,Hebei,China)

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《华南理工大学学报（自然科学版）》2024年第4期88-94,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：河北省自然科学基金资助项目(2020203022)。

摘　　要：自润滑关节轴承在服役过程中,衬垫的磨损导致自润滑关节轴承内外圈之间产生间隙,自润滑运动副间隙的存在加速了内外圈之间的碰撞以及衬垫的进一步磨损,对自润滑关节轴承的动力学特性产生较大的影响。此外,衬垫的磨损还会导致各构件非线性特性的恶化,降低自润滑关节轴承的稳定性。为研究织物衬垫磨损对自润滑关节轴承动力学响应的影响,文中建立了带间隙的自润滑关节轴承运动副矢量模型。首先,通过修正Lankarani-Nikravesh(L-N)法向接触力模型和改进的库仑摩擦力模型,对内外圈间隙处的碰撞力进行建模;然后,基于牛顿第二定律建立了含间隙的刚柔耦合动力学方程;最后,分析讨论不同织物衬垫磨损量和不同摩擦因数条件下含间隙的自润滑关节轴承传动系统的动力学特性,并利用相图和Poincare映射图分析了自润滑关节轴承的非线性特性。结果表明:随着织物衬垫磨损量的增加,自润滑关节轴承内圈和外圈的动力学行为表现出非线性特性;衬垫磨损量一定时,随着衬垫摩擦因数的增加,系统稳定性得到提高,抑制了混沌现象的发生。In the service process of self-lubricating joint bearings,the wear of the liner leads to the gap between the inner and outer rings of the self-lubricating joint bearings.The existence of the clearance of the self-lubricating remote pair accelerates the collision between the inner and outer rings and further wear of the liner,which has a great impact on the dynamic characteristics of the self-lubricating joint bearings.In addition,the wear of the liner will also lead to the deterioration of the nonlinear characteristics of each component and reduce the stability of selflubricating joint bearings.In order to study the effects of the wear of the self-lubricating liner on the dynamic response of the self-lubricating joint bearing,this study established the kinematic subvector model of selflubricating joint bearing with clearance.Firstly,it modeled the collision force at the gap between the inner and outer rings by modifying the Lankarani-Nikravesh(L-N)normal contact force model and improving the Coulomb friction force model.Then,based on Newton’s second law,it established the rigid-flexible coupling dynamic equation with gap.Finally,it analyzed the dynamic characteristics of the drive system of the self-lubricating knuckle bearing with clearance under different wear amount and friction factor.And it also analyzed the nonlinear characteristics of the self-lubricating knuckle bearing by using phase diagram and Poincare mapping diagram.The results show that the dynamic behavior of the inner and outer rings of the self-lubricating joint bearing exhibits nonlinear characteristics with the increase of the wear amount of the fabric liner.When the wear amount is certain,the stability of the system is improved with the increase of the friction factor of the liner,and the occurrence of chaos is suppressed.

关 键 词：自润滑关节轴承 衬垫磨损 刚柔耦合动力学 动态特性 

分 类 号：O313[理学—一般力学与力学基础]