【作者】 徐启圣；

【导师】 高传玉；

【作者基本信息】 江苏大学 ， 机械制造及其自动化， 2003， 硕士

【摘要】 发动机是内燃机的心脏，缸套—活塞环系统的润滑效果直接影响到内燃机的功能、使用寿命以及污染物的排放等等，缸套的磨损程度是决定内燃机大修的标准，因此，很有必要采取有效的措施来提高其耐磨性。 本文是关于改进内燃机缸套—活塞环润滑系统的研究，在激光珩磨后具有交叉型网纹储油结构的气缸套表面上，根据缸套活塞环的实际接触情况建立了相应的数学模型，再以线接触弹性流体动力润滑理论建立了相应的润滑模型，将平均Reynolds方程用于润滑和摩擦的分析，可以反映表面形貌即交叉型网纹对缸套磨损效果的影响。通过编程(用Matlab编)，改进并利用在润滑理论中用得最活跃的多重网格法对模型中的控制方程进行了数值模拟计算，反应了网纹各参数如交角、深度、波长以及螺旋升角对润滑效果的影响，得到了相对较佳的网纹参数。 本文研究结果不仅对该润滑系统的摩擦学设计和系统优化提供了方法和途径，而且对实际生产如激光珩磨工艺参数的确定有着重要的理论指导意义。更多还原

【Abstract】 The lubrication effect of cylinder liner - pistons system in internal combustion engine directly influences its function, usage life release of pollution and so on. The wear degree of the liner decides whether internal combustion engine needs repairing or not. Thereafter, it is necessary to take effective measure to improve the wear resistance of liner.The paper is concerned with the study of developing cylinder liner - pistons system in internal combustion engine. The internal face of liner has storing oil-structure with crossing mesh through laser honing. The corresponding mathematical model is designed on the basis of the real contact of cylinder liner pistons system, and the corresponding lubrication model is founded with line contact elastohydrodynamic lubrication theory. To apply average Reynolds to the analysis of lubrication and friction can mirror crossing mesh’s influence on the wear effect. Through program programmed with Matlab, the controlling equations in model were solved by the multilevel solver which is utilized the most active in the lubrication theory and developed. And its effect showed the influence of mesh parameters such as across the mesh across angel, distance between meshes, depth, wave length and spiral angel on the lubrication effect. Finally relatively better parameters were obtained.Not only the effect of this study does provide the method and approach for tribological design and optimization of the lubrication system but also has important theory guide significance to mechanical process and the choice of its parameters.更多还原