考虑轴颈倾斜的动载滑动轴承混合弹流润滑特性研究  

Study on the mixed elasto-hydrodynamic lubrication characteristics of dynamically loaded journal bearings considering journal misalignment

作　　者：曹喜 唐兴波 车常飞 廖剑锋 冯丞科 张成耀 熊国庆 CAO Xi;TANG Xingbo;CHE Changfei;LIAO Jianfeng;FENG Chengke;ZHANG Chengyao;XIONG Guoqing(Chongqing Gas Mine of PetroChina Southwest Oil and Gas Field Branch,Chongqing 400707,China;Beijing Key Laboratory of Health Monitoring and Self-recovery for High-end Mechanical and Equipment,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]中国石油西南油气田分公司重庆气矿,重庆400707 [2]北京化工大学高端机械装备健康监控与自愈化北京市重点实验室,北京100029

出　　处：《机械传动》2025年第2期48-55,共8页Journal of Mechanical Transmission

摘　　要：【目的】针对动载滑动轴承轴颈倾斜状态下润滑特性不清晰的问题,构建考虑轴颈倾斜状态的动载滑动轴承混合弹流润滑模型。【方法】在滑动轴承瞬态混合润滑模型基础上,修正轴颈倾斜状态下的油膜厚度,引入金属表面粗糙峰弹塑性接触模型,进一步耦合了轴颈中心动力学方程与时变载荷;设计数值求解方案与模型收敛条件,实现了对动载滑动轴承轴颈倾斜状态下的润滑仿真。【结果】结果表明,随着轴颈倾斜角度的增大,最大油膜压力与粗糙接触压力显著增大,呈现一定的非线性规律,最小油膜厚度则表现为近似线性下降,压力与油膜分布随倾斜的增大表现出明显的非均匀性;轴心轨迹反映出倾斜状态下的轴颈位置低于轴颈对齐状态。[Objective]In response to the unclear lubrication characteristics of dynamically loaded journal bearings under misaligned journal states,a mixed elasto-hydrodynamic lubrication model for dynamically loaded journal bearings considering journal misalignment was constructed.[Methods]Based on the transient mixed lubrication model of journal bearings,the oil film thickness under journal misalignment was modified,and a metal surface roughness peak elastoplastic contact model was introduced to further couple the dynamics equation of the journal center with time-varying loads.A numerical solution scheme and model convergence conditions were designed to achieve lubrication simulation of dynamically loaded journal bearings with journal misalignment.[Results]The results show that as the misalignment angle of the journal increases,the maximum oil film pressure and rough contact pressure significantly increase,exhibiting a specific nonlinear law.The minimum oil film thickness shows an approximately linear decrease,and the pressure and oil film distribution show significant non-uniformity with the increase of misalignment angle.The axis trajectory reflects that the journal’s position in the misaligned state is lower than that in the alignment state of the journal.

关 键 词：轴颈倾斜 动载 滑动轴承 混合弹流润滑 

分 类 号：TH133[机械工程—机械制造及自动化]