1201 非線形軌道法による外部弾性・減衰要素に支持されたヘリングボーン動圧気体軸受の安定性の検討(GS10 設計工学・システム)

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This paper described the stability threshold of the herringbone grooved aerodynamic journal bearings with the external springs and dampings. The change of the air film thickness due to the centrifugal growth of a rotor was considered and the nonlinear lubrication equation based on the narrow groove theory was solved directly by the non-linear orbit method. The locus of the journal and bearing center were obtained by the Runge-Kutta-Gill method. As the results of this work, the results obtained by the non-linear orbit method had a good agreement with the results of the linear method. Moreover, the behavior of the journal and bearing were also cleared in the stability regions, the stability threshold and the unstable regions.
2008-09-19