The Studies of Static/Dynamic Characteristics and Stability in Rotor-aerostatic Bearing System
博士 === 中原大學 === 機械工程研究所 === 97 === Abstract This project has dealt with the integrated research of the spindles with aerostatic bearings. The contents include studies in load capacity, stiffness, damping ratio, critical inertial force, critical whirl ratio for aerostatic-bearing spindle, analysis fo...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2009
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| Online Access: | http://ndltd.ncl.edu.tw/handle/44533345787232415616 |
| Summary: | 博士 === 中原大學 === 機械工程研究所 === 97 === Abstract
This project has dealt with the integrated research of the spindles with aerostatic bearings. The contents include studies in load capacity, stiffness, damping ratio, critical inertial force, critical whirl ratio for aerostatic-bearing spindle, analysis for simulating the influences of design parameters in operation performances and characteristics and optimal design for aerobearing-spindle system.
The Reynolds equation is solved by the finite difference method and numerical integration to yield static and dynamic characteristics of air film. The motion equation of the rotor-bearing system is obtained by using the perturbation method and the eigensolution method is used to determine the stability threshold. The eccentricity, spindle speed, and restriction parameter are considered in the analysis of the whirl instability of the rotor-aerostatic bearing system for the different comparisons between various designs in the number and location of entry holes of aerostatic bearings.
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