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首页> 外文期刊>Journal of Micromechanics and Microengineering >Rotordynamic characteristics of a micro turbo generator supported by air foil bearings
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Rotordynamic characteristics of a micro turbo generator supported by air foil bearings

机译：空气箔轴承支撑的微型涡轮发电机的转子动力学特性

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摘要

The rotordynamic characteristics of a micro power system supported by air foil bearings were investigated. Stability analysis was performed by a finite element method with the predicted dynamic coefficients of the foil bearings. A preliminary test rig was developed to simulate the operating characteristics of the micro power system. It consisted of a rotor supported by two air foil journal bearings and two air foil thrust bearings, and an impulse driven turbine. The foil journal bearings had a diameter of 7 mm and a length of 7 mm (L/D = 1). The test rig was operated stably under various situations and speeded up to 300 000 rpm. The main portion of the rotor response was synchronous and the amplitude of synchronous vibration was about 5 - 20 mu m. Further, theoretical and experimental results for the unbalance response were compared. From this study, we showed the possibility of stable performance for the micro power system supported by air foil bearings.
机译：研究了由空气箔轴承支撑的微动力系统的转子动力学特性。通过有限元方法对箔轴承的预测动态系数进行稳定性分析。开发了初步的测试设备，以模拟微功率系统的运行特性。它由一个转子和一个脉冲驱动的涡轮组成，该转子由两个气箔轴颈轴承和两个气箔推力轴承支撑。箔片轴颈轴承的直径为7毫米，长度为7毫米（L / D = 1）。该试验台在各种情况下均能稳定运行，并能达到30万转/分。转子响应的主要部分是同步的，同步振动的幅度约为5-20μm。此外，比较了不平衡响应的理论和实验结果。从这项研究中，我们表明了由空气箔轴承支撑的微动力系统稳定性能的可能性。

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