| Summary: | 碩士 === 國立成功大學 === 機械工程學系 === 89 === In the study of gas bearing, how the pressure distribution and the precision of bearing rotation are precisely calculated is an important material for gas bearing design. In this work the theory and the precise analysis of bearing performance are presented. First, the mathematical model of gasflowing condition in the bearing is constructed. After the derivation and the simplification from Navier-Stoke Equation resulting the expected Reynold’s Equation. The combination of continuous equation and flow equation of orifice throttle is then substitute into Reynold’s Equation. Finally The resulting revised nonlinear Reynolds Equation with dimensionless is discretized by, using Newton’methed. The revised numerical iteratived method is then dopted to solve the problem. This method can be used to simulate the high eccentricity ratio journal, the high-speed noncircular journal, the thrust bearing and the non-plane slide bearing, etc.. The analysis can be treated as the fundamental to construct the performance analysis gas bearing.
The performance of the static- and dynamic-pressure gas bearing can be analyzed by the constructed numerical model. It includes the analyses of film pressure distribution, friction, loading capacity, rigidity, flow rate of lubricative gas, and eccentricity ratio, etc.. With the appropriate design of precise rotating bearing, the results of this study could be provided as the fundamental of optimized design and analysis of bearing.
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