计及表面形貌和热效应的燃油泵滑动轴承润滑分析  

Lubrication analysis of fuel pump journal bearing considering surface topography and thermal effect

作　　者：段京华[1] 孙军[2] 

机构地区：[1]安徽省汽车工业学校教学部,安徽合肥230041 [2]合肥工业大学机械与汽车工程学院,安徽合肥230009

出　　处：《机械设计》2016年第6期1-5,共5页Journal of Machine Design

摘　　要：主要分析了轴承表面形貌和润滑剂黏温效应对燃油泵滑动轴承润滑性能的影响。以流体润滑理论为基础,计及轴承表面形貌参数和润滑剂黏温效应等影响因素,建立燃油泵滑动轴承润滑分析模型。Reynolds方程采用有限差分法求解,联立Reynolds方程、热平衡方程及润滑剂黏温方程求解轴承油膜压力和温升。结果表明:表面形貌和热效应对燃油泵滑动轴承的润滑性能存在直接影响,且偏心率越大,影响越明显;表面越粗糙或表面方向参数越小,轴承最大油膜压力、油膜反力和摩擦力均越大;考虑热效应时,轴承最大油膜压力、油膜反力、端泄流量和摩擦力均减小。The effects of surface topography of bearing and temperature-viscosity effect of lubricant on the lubrication performance of fuel pump journal bearing were analyzed. Based on the hydrodynamic lubrication theory, the analysis model of hydrodynamic lubrication of fuel pump journal bearing was established considering the surface topography of bearing and the temperature-viscosity effect of lubricant. Reynolds equation was solved by the finite difference method. The oil film pressure and temperature rise of bearing were solved by Reynolds equation, thermal equilibrium equation and temperature-viscosity equation of lubricant. The results showed that the surface topography and thermal effect have direct effect on the lubrication performance of fuel pump journal bearing, and the larger the eccentricity is, the more obvious effect will be. The more the surface roughness or the less the parameter of surface direction, the larger the maximum oil film pressure. The resultant oil film force and the frictional force of bearing will be. When the thermal effect was considered, the maximum oil film pressure, the resultant oil film force, the end flow-rate and the frictional force of bearing will be decreased.

关 键 词：燃油泵 滑动轴承 润滑 表面形貌 热效应 

分 类 号：TH133[机械工程—机械制造及自动化]