摘要
在缸套表面制备旋转抛物面形微坑织构,在经典雷诺方程的基础上对微坑-缸套-活塞环系统进行研究,建立微坑动压分布函数。采用Matlab软件分析微坑深度、坑口半径对旋转抛物面形微坑润滑性能的影响。结果表明,随着微坑深度、坑口半径增大,平均油膜承载力呈现先增大后减小趋势,活塞环所受平均剪切应力呈现逐渐减小并趋于稳定,这是因为活塞相对缸套运动过程中,微坑区域内的楔形效应、空化效应导致了平均油膜承载力和平均剪切应力的波动。通过研究得到了旋转抛物面形微坑优化参数。
The rotating parabolic micro-pit were prepared in the cy!inder surface. The rotating parabolic micro-pits-liner-piston ring system was studied based on the classic Reynolds equation and the micro-pits dynamic pressure distribution function was established. The impact of micro-pits depth and radius on the lubricating properties of the rotating parabolic micro-pit was analyzed by using Matlab software. The results show that, along with the increasing of micro-pit depth and pit radius, the average film bearing capacity is increased at first then decreased, the average shear stress is gradually de- creased and tends to be a stable value. It is because the wedge effect, cavitation in the micro-pit area leads to the fluctua- tions of average oil film bearing capacity and average shear stress during the movement process of the piston relative to the cylinder liner. The optimization parameters of rotating parabolic micro-pits are achieved.
出处
《润滑与密封》
CAS
CSCD
北大核心
2015年第4期54-57,共4页
Lubrication Engineering
基金
国家自然科学基金项目(51275490
50975265)
山西省自然科学基金项目(2013011024-5)
关键词
缸套
活塞环
微坑
流体动压润滑
cylinder
piston ring
micro-pits
hydrodynamic lubrication
