摘要
基于弹流润滑理论研究滚子轴承结构参数对其润滑特性的影响。结合弹性接触变形方程以及流体动力学润滑方程,建立适合于滚子轴承的弹流润滑模型,研究在不同椭圆率、载荷、卷吸速度以及黏度等因素作用下滚子轴承的摩擦学性能变化规律。结果表明:椭圆率、载荷、卷吸速度以及黏度会不同程度地影响压力峰值及二次压力峰等参数;随着椭圆率的增大,油膜厚度以及压力显著增大;随着载荷的增大,总体压力、压力峰值、二次压力峰及其尖锐度明显增大,但最小油膜厚度略有下降;黏度与最小油膜厚度以及压力存在着明显正相关关系;卷吸速度与油膜厚度存在着微弱正相关关系,与油膜压力存在着微弱负相关关系。因此,一定程度上增大椭圆率并减小载荷,有利于提高润滑性能。
The influence of structural parameters of cylindrical roller bearings on their lubrication characteristics was studied based on the theory of elastohydrodynamic lubrication.By combining the elastic contact deformation equation and the fluid dynamics lubrication equation,an elastohydrodynamic lubrication model suitable for roller bearings was established to study the changes in frictional properties of roller bearings under different parameters,such as ellipticity,load,entrainment speed,and viscosity.The results show that the ellipticity,load,suction speed,and viscosity will affect parameters such as pressure peak and secondary pressure peak to varying degrees.As the ellipticity increases,the oil film thickness and pressure significantly increase,as the load increases,the overall pressure,pressure peak,secondary pressure peak and their sharpness significantly increase,but the minimum oil film thickness slightly decreases.There is a significant positive correlation between viscosity and minimum oil film thickness and pressure.There is a weak positive correlation between entrainment velocity and oil film thickness,and a weak negative correlation between entrainment velocity and oil film pressure.Therefore,increasing the ellipticity and reducing the load to a certain extent is beneficial for improving lubrication performance.
作者
黄嘉铭
顾春兴
HUANG Jiaming;GU Chunxing(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200082,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2024年第7期40-49,共10页
Lubrication Engineering
基金
上海市青年科技英才扬帆计划项目(19YF1434500)
国防基础科研重点项目(JCKY2020203B037)。
关键词
滚子轴承
弹流润滑
线接触
点接触
多重网格法
roller bearing
elastohydrodynamic lubrication(EHL)
line contact
point contact
multigrid method
