有限长轴颈轴承的弹性流体动力润滑分析  

The Analysis of Elasto-hydrodynamic Lubrication in the Finite-length Journal Bearing

作　　者：于如飞[1] 陈渭[1] 

机构地区：[1]西安交通大学现代设计及转子轴承系统教育部重点实验室,陕西西安710049

出　　处：《西华大学学报（自然科学版）》2016年第1期13-18,57,共7页Journal of Xihua University:Natural Science Edition

基　　金：国家自然科学基金资助项目(51175409/E050504)

摘　　要：为研究变形对有限长轴颈轴承弹流润滑特性的影响,利用Winkler弹性基础模型对其进行分析,使用压力和膜厚双重迭代方法进行数值模拟求解。其结果表明:载荷越大,刚性轴承与柔性轴承的油膜压力和厚度差异越大;在轴承表面变形的条件下,随载荷的增大,偏心率随转速增大而减小的幅度变小,偏位角随转速增大而增大的幅度亦变小;随转速的增大,偏心率随载荷增大而增大的幅度变大,偏位角随载荷增大而减小的幅度亦变大。此外,还研究了在定载荷条件下轴承宽度、厚度、润滑油黏度、间隙等参数对油膜压力、厚度及破裂位置的影响规律。该研究成果可为轴颈轴承的设计及其性能计算提供相应的理论参考。The Winkler elastic foundation model is used to analyze the effect of deformation on the elasto-hydrodynamic of the finite length journal bearing. The dual iteration method of pressure and film thickness is used in the numerical simulation. The results indi- cate that the differences of oil film pressure and thickness between rigid and flexible bearing increase with the increasing load. Further studies were carried out for bearing surface deformation. The results show that with the increase of the load, the decreasing range of the eccentricity ratio reduces along with the increasing of the rotation speed, and the increasing range of the attitude angle also decreases a- long with the increase of the rotation speed. However, with the increase of the rotation speed, the increasing range of the eccentricity ratio increases along with the increase of the load, and the decreasing range of the attitude angle also increases along with the increase of the load. Besides that, the effect of the bearing width, bearing thickness, lubricant oil viscosity and clearance on the oil film pres- sure, thickness and fracture position were investigated under constant load. The findings of this study can provide corresponding theo- retical instructions for the design and the performance computation of journal bearing.

关 键 词：WINKLER模型 有限长轴颈轴承 弹流润滑 偏位角 偏心率 

分 类 号：TH117.1[机械工程—机械设计及理论] TH133.3