摘要
径向轴承在运行过程中由于磨损、疲劳裂纹、烧蚀、开有油槽等,可能会出现沟槽缺陷而影响轴承的润滑状态。基于Reynolds方程对表面有沟槽的径向轴承进行理论建模并进行数值模拟,得到表面有凹槽缺陷的径向轴承在润滑过程中油膜厚度、压力的分布,研究不同形状、周向宽度、深度和周向间距的凹槽对轴承润滑状态的影响。研究结果表明,矩形凹槽对轴承润滑的影响最大;凹槽参数对轴承润滑的影响在润滑油入口区和出口区各不相同,在润滑油入口区,随着凹槽周向宽度、周向间距的增加,承载力减小、摩擦因数增大;在润滑油出口区,随着凹槽周向宽度、周向间距的增加,承载力增大、摩擦因数减小;在润滑油出口区,凹槽深度对轴承润滑影响不大,而在润滑油入口区,凹槽深度增加将导致承载力减小、摩擦因数增大。
Due to wear, fatigue crack, erosion and oil grooves during operation, the grooves may be formed on the journal bearing, which will affect bearing lubrication. The theoretical model of journal bearing was established based on the Reyn- olds equation, and the oil film thickness and pressure distribution in the process of bearing lubrication were obtained by nu- merical simulation. The effects on beating lubrication state parameters by groove shape as well as groove parameters of cir- cumferential width, circumferential distance and groove depth were investigated. The results show that rectangular grooves have biggest influence on bearing lubrication. The influences of groove parameters on lubrication state between inlet zones and outlet zones are not the same. In the inlet zone of lubricating oil,with the increasing of circumferential width and cir- cumferential distance, the bearing loading capacity is decreased and the coefficient of friction is increased, while in the out- let zone of lubricating oil,the bearing loading capacity is increased and the coefficient of friction is decreased. The influ- ence of groove depth on bearing lubrication increasing of groove tion. depth will result in the is not obvious in the outlet zone of lubricating oil, while in the inlet zone, the decreasing of bearing loading capacity and the increasing of coefficient of fric-tion.
出处
《润滑与密封》
CAS
CSCD
北大核心
2015年第2期23-27,共5页
Lubrication Engineering
关键词
凹槽缺陷
径向轴承
润滑状态
groove defects
journal bearing
lubrication state
