Prototyping of palm top size micro gas turbine shaft system supported by foil bearings and the evaluation of dynamic characteristics

Shlgehiko Kaneko, Yoshihlro Miyano, Yuji Mori, Tatsuo Watanabe

研究成果: Review article査読

抄録

In recent years, micro gas turbines (MGT) of 100kW or less are drawing close attention as power generators equipped with cogeneration features. Aerodynamic foil bearings are considered to be the best candidate for the MGT due to its ease of maintenance. However, the details of bearing design guidelines have not been clarified though this technology is used in auxiliary power units (APU) for aircraft units. Firstly, we designed and manufactured radial foil bearings for the rotor manufactured from commercially available turbochargers. The diameter of the rotor is 20mm and the surface of the rotor is coated by ceramic. The radial bearing used here is composed of two elements; i.e. a housing and a multi wounded foil with projections of hemisphere on one side in the adequate interval. The bearing radial clearance between the rotor surface and the foil is 20m. In the experiment, we measured rotational speed and vibrations of the rotor in the radial and axial directions. Subsequently, analyses for the evaluation of first natural frequencies corresponding to lateral, conical and the first bending mode were introduced. Finally, the method for predicting the onset whirl rotational speed based on simple measurement is explained.

本文言語English
ページ(範囲)227-234
ページ数8
ジャーナルNihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy
84
3
出版ステータスPublished - 2005 3 1
外部発表はい

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • 燃料技術
  • エネルギー工学および電力技術

フィンガープリント

「Prototyping of palm top size micro gas turbine shaft system supported by foil bearings and the evaluation of dynamic characteristics」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル