螺旋槽动压径向气体轴承承载特性研究  

Study on Bearing Characteristics of Spiral Groove Dynamic Pressure Gas Bearing

作　　者：王洪涛[1] 董志强[1] WANG Hongtao;DONG Zhiqiang(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China)

机构地区：[1]太原科技大学机械工程学院,山西太原030024

出　　处：《润滑与密封》2022年第6期65-72,共8页Lubrication Engineering

基　　金：国家自然科学基金青年科学基金项目(51106162)。

摘　　要：为研究螺旋槽动压径向气体轴承承载特性,运用SolidWorks软件建立其物理模型。基于气体润滑基本方程Navier-Stokes方程,推导出可压缩非定常雷诺方程式。应用CFD技术和流体动力学Fluent软件对气体润滑基本方程Navier-Stokes方程直接求解,得到轴承在不同转速条件下的压力分布,以及轴承承载能力随螺旋槽动压径向轴承结构参数和运行参数的变化规律。结果表明;螺旋槽气体动压轴承在偏心方向气膜厚度最小,压力相对其他区域较大,随着转速的提高,轴承的动压效应更加显著,使得最大压力值逐渐增大;随着槽长、槽深比、槽数等结构参数的增加,以及偏心率、转速等运行参数的增加,轴承承载能力增大;而随着半径间隙的增大承载力减小。研究结果为螺旋槽动压径向气体轴承的设计及优化提供理论依据。In order to study the bearing characteristics of spiral groove dynamic pressure radial bearing,a three-dimensional physical model was established by using SolidWorks software.Based on the Navier-Stokes equation,the compressible unsteady Reynolds equation was derived.The basic Navier-Stokes equation of gas lubrication was solved directly by CFD technology and fluid dynamics Fluent software,the pressure distribution of the bearing under different rotating speeds and the variation law of the bearing capacity with the structural parameters and operating parameters of the spiral groove dynamic pressure radial bearing were obtained.The results show that the gas film thickness of spiral groove gas hydrodynamic bearing is the smallest in the eccentric direction,and the pressure is larger than that in other areas.With the increase of rotating speed,the maximum pressure gradually increases due to the significant dynamic pressure effect of the bearing.With the increase of structural parameters such as groove length,groove depth ratio,groove number,as well as the increase of operating parameters such as eccentricity and speed,the bearing capacity increases.The bearing capacity decreases with the increase of radius gap.The research results provide a theoretical basis for the design and optimization of spiral groove hydrodynamic radial gas bearing.

关 键 词：螺旋槽动压径向气体轴承 承载力 螺旋槽 气体润滑 

分 类 号：TH133.35[机械工程—机械制造及自动化]