摘要
为分析油气润滑高速滚动轴承腔内油膜流动特性,采用FLUENT软件中VOF(Volume of Fluid)多相流模型和SMM(滑移网格模型)运动方法,建立轴承腔内油气两相流运动模型,对两相流流动进行瞬态数值计算。并以SKF 6307深沟球轴承为对象进行分析,结果表明:轴承腔内油气两相流在内、外圈沟道和球上形成连续油膜,转速、供油量和供气压力是影响两相流油膜运动的重要因素;在油膜流动稳定的状态下,随供油量、转速增大,内、外圈沟道油膜厚度先增大后减小;随供气压力增大,油膜厚度逐渐增大并趋于稳定;此外,空气对油膜的剪切作用和油膜重力作用对油膜平均速度有直接影响。
In order to analyze oil film movement characteristics in oil-gas lubricated high speed rolling bearings,the VOF multi-phase flow model and SMM motion method of Fluent are adopted to establish oil-gas two-phase flow movement model in bearing cavity,and the transient numerical calculation of two-phase flow is carried out.Taking deep groove ball bearings SKF6307 as research objects for analysis,the results show that a continuous oil film is formed by oil-gas two-phase flow in bearing cavity on inner and outer ring raceway and ball,the rotational speed,oil supply amount and air supply pressure are important factors influencing two-phase flow oil film movement.The oil film thickness of inner and outer ring raceway increases firstly and then decreases with increase of oil supply amount and rotational speed under stable state of oil film flow.The oil film thickness increases gradually and tends to stabilize when the air supply pressure increases.In addition,the shear action of air on oil film and the gravity action of oil film have a direct influence on average speed of oil film.
作者
王保民
刘华文
张志愿
WANG Baomin;LIU Huawen;ZHANG Zhiyuan(School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzou 730050,China)
出处
《轴承》
北大核心
2019年第12期28-34,共7页
Bearing
关键词
深沟球轴承
油气润滑
轴承腔
油气两相流
油膜厚度
deep groove ball bearing
oil-gas lubrication
bearing cavity
oil-gas two-phase flow
oil film thickness
