表面粗糙度对浮环轴承润滑静特性的影响  

Effect of Surface Roughness on Static Characteristics of Floating Ring Bearing

作　　者：秦超[1] 康洋[1] 宋坤[1] 张浩[1] 甄冬[1] 师占群[1] 

机构地区：[1]河北工业大学机械工程学院,天津300130

出　　处：《润滑与密封》2017年第5期66-72,95,共8页Lubrication Engineering

基　　金：国家自然科学基金项目(51275150);天津市自然基金项目(13JCYBJC41500;14JCYBJC42100)

摘　　要：为研究粗糙度对浮环轴承静特性的影响,基于雷诺方程并结合随机粗糙模型建立粗糙形状的浮环轴承模型,采用有限差分法对模型进行求解,得到浮环轴承润滑过程中的油膜厚度和油膜压力分布。结果表明:油膜承载力随粗糙度的增大而增大,内层油膜承载力大于外层油膜承载力;端泄流量随粗糙度的增大而减小,内层油膜端泄流量大于外层油膜端泄流量;摩擦功耗随粗糙度的增大而增大,内层油膜摩擦功耗小于外层油膜摩擦功耗。The theoretical model of floating ring bearings under different conditions was built based on the Reynolds equation and random rough model to study the effect of surface roughness on the static characteristics of floating ring bearings.The oil film thickness and pressure distribution were obtained by solving the theoretical model with finite difference method.The results show that the bearing capacity of oil film is increased with the increasing of surface roughness, and the bearing capacity of inner oil film is larger than that of outer oil film.The leakage rate of floating ring bearings is decreased with the increasing of the surface roughness, and the leakage rate of inner oil film is larger than that of outer oil film.The friction power consumption is increased with the increasing of surface roughness and the friction power consumption of inner oil film is less than that of outer oil film.

关 键 词：浮环轴承 润滑 粗糙度 静特性 

分 类 号：TH117.2[机械工程—机械设计及理论]