粘弾性体で支持されたフォイルスラスト空気軸受の静的特性

摘要

Recently, aerodynamic bump foil bearings have attracted considerable attentions in oil-free turbo machines. However, the structure of bump foils is usually very complicated and it is difficult to fabricate these bump foils. This paper proposes a foil thrust bearing supported by visco-elastic material instead of bump foils. The structure of the proposed foil bearing is much simpler than that of a foil thrust bearing with bump foils. In this paper, the static characteristics of the proposed thrust foil bearing are numerically investigated and the experiment was conducted using manufactured test bearings. It was confirmed that the proposed foil thrust bearing could be easily manufactured and operate well as an aerodynamic thrust bearing.%フォイル空気軸受は，ガスタービンなどのターボ機rn械のオイルフリー化に対応できる軸受として注目され，rn近年，多くの研究がなされている．これまでに報告さrnれている研究の多くは，軸受面を構成するトップフォrnイルをバンプフォイルと呼ばれる波状金属薄板によりrn弾性支持する構造を取り扱っている．