摘要
理论研究和工程实际表明,微小型高速深沟球轴承的润滑状态不仅影响其承载能力和可靠性,而且决定着分子泵的工作性能。本文针对微小型高速深沟球轴承这一特殊轴承在高速轻载条件下进行弹流润滑数值分析,求得其特征弹流解;并且通过计算不同速度参数下得到的最小膜厚,分析速度参数对最小膜厚的影响,为微小型分子泵轴承润滑性能优化提供依据。
The elastohydrodynamic lubrication of the small deep groove ball-bearing,rotating at a high rotation speed under a small load in low vacuum,was empirically approximated,mathematically modeled,and analytically evaluated by solving the newly-formulated elastohydrodynamic equation-set in direct iteration method.The impact of the realistic situation,including but not fimited to the rotation speed,lubricant viscosity and pressure,on the minimum thickness of the lubricant-oil film was numerically calculated with self-developed program and software Matlab.Moreover,the dependence of the distributions of pressure and thickness of oil film on the speed was derived by numerical calculation.The calculated results show that the speed significantly affects the thickness of the oil film.For example,as the speed increases,the film thickness first slowly increases and then levels off.We suggest that the calculated results may be of some technological interest in design of miniaturized turbo molecular pump.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2016年第4期471-476,共6页
Chinese Journal of Vacuum Science and Technology
基金
国家重大科学仪器设备开发专项资助课题(2013YQ130429)
关键词
高速深沟球轴承
分子泵
弹流润滑
数值分析
Tiny deep groove ball bearings
Molecular pump
Elastohydrodynamic lubrication
Numerical analysis
