Numerical Simulation Calculation of Piston Skirt Oil Film Lubrication
In this paper, a mathematic model for piston skirt oil film lubrication is deduced, which based on the fluid dynamics lubrication theory and including the pressure flow factor, shear flow factor, contact factor. Influence of rms roughness in piston skirt surface and its profile are considered in this model. The model considers the roughness of the surfaces and the topography of the skirt in both the axial (barrel profile) and circumferential directions (ovality). Parameters include piston skirt profile, piston to cylinder liner clearance, surface roughness are investigated. The results show that some of these parameters have profound effects on the frictional and impact forces at the piston-skirt/liner interface and therefore they have the potential to optimize the piston friction power loss. Piston secondary motion that combining piston dynamics equation and oil film lubrication is also analyzed. A FORTRAN program with finite element method for numerical solving the Reynolds equation is developed. The program is used for TBD620 diesel engine as an example, and calculates oil film pressure, thickness, friction forces, profile of piston skirt etc. The obtained results have directive significance to the design of low noise internal combustion engine. These results aim at providing a set of quantitative design guidelines.
Mi Fei Zhang Wen-ping
Power and Energy Engineering Institute, Harbin Engineering University
国际会议
2007年(中国内燃机学会第六届学术年会暨国际内燃机学术研讨会和第六届中国国际内燃机及制造装备展览会)两会一展国际学术会议
上海
英文
282-289
2007-10-09（万方平台首次上网日期，不代表论文的发表时间）