外圈故障引起圆柱滚子轴承IAS扰动动力学建模  

Dynamic modeling of instantaneous angular speed disturbances in cylindrical roller bearings caused by outer ring failure

作　　者：韩谯 郭瑜[1] 樊家伟 HAN Qiao;GUO Yu;FAN Jiawei(Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学机电工程学院,云南昆明650500

出　　处：《振动工程学报》2025年第2期441-448,共8页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(52165067);云南省重大专项科技计划资助项目(202002AC080001)。

摘　　要：针对瞬时角速度(instantaneous angular speed,IAS)信号与轴承机械动力学之间的关系研究和工业机器人RV减速器转臂轴承在低速工况下易发生失效的问题,提出了一种三自由度局部故障滚子轴承IAS扰动的动力学模型。模型基于Hertz线接触理论,分析了滚子与滚道间相互作用产生的局部变形对IAS的影响机理,给出了耦合切向力与力矩的计算方法;将故障冲击引入扭矩分析,计算故障区带来的扭矩变化,增加角自由度,建立了法向力与切向力相耦合的三自由度轴承IAS扰动动力学模型。采用四阶-龙库塔数值积分法求解,并在近似条件下将仿真与实验结果进行对比分析。结果表明,该模型能较好地解释圆柱滚子轴承IAS扰动的来源,有效反映外圈故障对IAS带来的影响,进一步完善了滚动轴承动力学理论。In light of investigating the interplay between the instantaneous angular speed(IAS)signal and mechanical dynamics of bearings,alongside addressing the vulnerability of rotary arm bearings within industrial robot RV reducers to failure under low-speed conditions,this paper presents a novel three-degree-of-freedom dynamics model to explain the IAS perturbations resultant from localized roller bearing failures.The model,rooted in the Hertz line contact theory,dissects the influence mechanism of local-ized deformations stemming from roller-raceway interactions on the IAS.A comprehensive approach to computing the coupled tan-gential force and torque is outlined.The integration of failure-induced impacts into torque analysis computes torque variations intro-duced by the failure zone,thereby augmenting angular degrees of freedom.As a result,a three-degree-of-freedom bearing IAS dis-turbance dynamic model,coupling both normal and tangential forces,is established.Employing fourth-order Runge-Kutta numeri-cal integration,the model is solved,and its results are meticulously compared and analyzed against experimental approximations under near-approximate conditions.The findings underscore the model’s ability to effectively expound upon the origins of IAS per-turbations in cylindrical roller bearings while adeptly reflecting the ramifications of outer ring failures on IAS.This work contributes to the refinement of rolling bearing dynamics theory,advancing the comprehension of intricate mechanical systems.

关 键 词：转子动力学 圆柱滚子轴承 瞬时角速度 Hertz线接触 

分 类 号：O347.6[理学—固体力学] TH133.33[理学—力学]