活塞环—缸套润滑状态周向不均匀性的研究

本文基于活塞环接触压力分布、活塞环偏摆、活塞环开口间隙位置的分析研究，指出了活塞环－缸套润滑状态周向不均匀性的客观存在。应用二维平均流量模型和微凸体接触方程，并考虑活塞系统的偏摆和润滑油粘度变化，提出了一个新的活塞环－缸套润滑状态的分析计算模型，给出了活塞环－缸套油膜厚度的三维分布，定量探讨了活塞环接触压力分布形状、活塞环偏摆、活塞环开口间隙位置对周向油膜厚度不均匀性的影响。

The Study of Circumferential Non Uniformity of Piston Ring Lubrication

Based on the investigation of effect of piston ring elastic pressure distribution, the tilt of piston ring, and the circumferential position of piston ring gap on piston ring lubrication, it is proved that the lubrication status of piston ring cylinder is non uniformity circumferentially. In this paper, by employing the two dimensional average flow model and asperity contact model, and taking the tilt of piston ring and the changing of lubricant viscosity into consideration, a new model which can be used to study the lubrication property of piston ring cylinder is presented, and three dimensional distribution of oil film thickness between piston ring cylinder is given. The effect of piston ring elastic pressure distribution, the tilt of piston ring and the position of piston ring gap on the non uniformity of oil film thickness between piston ring and cylinder is studied quantitatively.