摘要
为改善滚滑轴承的润滑,运用两相流理论对其滑块进行油气润滑设计,建立滑块的油-气两相流CFD模型,分析不同入口角度、进气速度、进油速度和润滑油黏度对流场油相分布的影响。结果表明:油-气混合润滑方式能在内外滚道接触区形成有效的润滑油膜;油气管道夹角影响油滴分布,角度过大时大量油滴会在滑块侧面上附着,角度过小时油滴会在外滚道入口处堆积,造成供油连续性不好,油膜稳定性下降;进气速度过大会降低油滴附着率,无法形成有效油膜,而进油速度过大会造成润滑油累积,出现搅油现象,因此选择合适的进气和进油速度,才能控制油滴的大小和保持润滑过程的连续性;润滑油黏度会影响油滴在滑块上的附着效果,合理地选择润滑油黏度,才能保证流场油相分布均匀。
In order to improve the lubrication of rolling-sliding bearing,the oil-gas two-phase flow CFD model of slider was established by using two-phase flow theory.The effects of different inlet angles,inlet velocities,oil inlet velocities and lubricant viscosity on oil phase distribution in the flow field were analyzed.The results show that the oil-gas mixed lubrication can form an effective lubrication film in the contact area of inner and outer raceways.The angle between oil and gas pipelines affects the distribution of oil droplets,too large angle will result in the adhesion of a large number of oil drops on the side of slider,while too small angle will result in the accumulation of oil drops at the entrance of the outer raceway,and reducing oil supply continuity and oil film stability.Excessive air intake speed will reduce the adhesion rate of oil droplets,and the effective oil film cannot be formed.Excessive oil intake speed will result in accumulation of lubricating oil and the occurrence of oil stirring phenomenon.Therefore,the appropriate oil and air intake speed should be selected to control the size of the oil drop and maintain the continuity of the lubrication process.The viscosity of the lubricating oil will affect the adhesion effect of the oil drop on the slider,the appropriate viscosity of the lubricating oil can ensure uniform oil phase distribution in the flow field.
作者
卢黎明
李中豪
李夫
谷开
LU Liming;LI Zhonghao;LI Fu;GU Kai(College of Mechanical and Electrical Engineering,East China Traffic University,Nanchang Jiangxi 330013,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2020年第5期43-48,共6页
Lubrication Engineering
基金
国家自然科学基金项目(51065009)
江西省自然科学基金项目(2016BAB206155).
关键词
滚滑轴承
滑块
油-气润滑
两相流
rolling-sliding bearing
slider
oil-gas lubrication
two-phase flow
