• CN:11-2187/TH
  • ISSN:0577-6686

›› 2005, Vol. 41 ›› Issue (2): 28-32.

• 论文 • 上一篇    下一篇

精密离心机静压气体轴承主轴系统的动力学特性分析

李树森;刘暾   

  1. 东北林业大学机电工程学院;哈尔滨工业大学航天工程与力学系
  • 发布日期:2005-02-15

ANALYSIS OF THE DYNAMICS OF PRECISION CENTRIFUGE SPINDLE SYSTEM WITH THE EXTERNALLY PRESSURIZED GAS BEARING

Li Shusen;Liu Dun   

  1. School of Mechatronic Engineering, Northeast Forestry University Department of Aerospace Engineering and Mechanics, Harbin Institute of Technology
  • Published:2005-02-15

摘要: 精密离心机静压气体轴承主轴系统的动力学特性分析是保障其标定加速度仪精度的重要研究课题。通过在小孔节流静压气体轴承的雷诺方程式中加入节流孔的流量项,使计算得以简化;采用了泛函求极值法将二阶偏微分方程离散化,用有限元法进行了承载能力和刚度的数值求解。 把描述静压气体轴承工作的偏微分方程式(雷诺方程)与建立的静压气体轴承主轴系统的动力学数学模型合并直接数值求解,提高了计算精度和可靠性。

关键词: 动力学, 精密离心机, 静压气体轴承, 主轴系统, 玻璃化转变温度, 电热损伤, 红外光谱, 湿热老化, 碳纤维/环氧树脂复合材料

Abstract: The analysis of the dynamics of precision centrifuge principal axis system with the externally pressurized gas bearing is an important issues in securing the precision of accelerometer. A term has been suggested to add to conventional Reynolds equation of orifice compensate externally pressurized gas bearing simplify the calculation. Through the method of the two step partially differentiate equation discretization, namely the optimization of variation functionals and proceed the numerical value resolution of carrying capacity and rigidity with finite element method. A direct resolution is adopted by merging partial differential equations (the equations of Reynolds) de-scribing the externally pressurized gas bearing performance with dynamics mathematical model of externally pressurized gas bearing spindle system, which enormously improves calcu-lation precision and reliability.

Key words: Dynamics, Externally pressurized gas bearing, Precision centrifuge, Spindle, electro-thermal damage, carbon fiber/epoxy composite, glass transition temperature, hydrothermal aging, infrared spectrum

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