Analysis of the dynamics of Precision

Centrifuge spindle system with the

externally pressurized gas Bearing

Li Shusen

(School of Mechatronic Engineering, Northeast Forestry University, Harbin 150040)

Liu Dun

(Department of Aerospace Engineering and Mechanics, Harbin Institute of Technology, Harbin 150001)

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) describing the externally pressurized gas bearing performance with dynamics mathematical model of externally pressurized gas bearing spindle system, which enormously improves calculation precision and reliability.

Key words: Precision centrifuge  Externally pressurized gas bearing  Spindle  Dynamics

CLC No: TH133.36  O322

航天工业总公司137重点资助项目(9.5.11A966000—15)和东北林业大学优秀青年教师创新基金资助项目. Received 20040120, received in revised form 20020040730