バンプフォイル軸受の理論最大負荷容量に及ぼすトップフォイルの浮上および取付状態の影響（第2報：軸受設計変数に関する広範な調査）

概要

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Bump foil journal bearings are prospective applicants that can support small-sized high-speed rotating machinery. In the previous report, the maximum load carrying capacity of the bearing was predicted, considering the detachment of top foil and the style of attachment of its trailing edge to the bearing housing, and these effects on the capacity were shown to be small. However, the result was obtained only from a base case of the bearing design variables. In this report, the capacity is presented extensively in other cases of the bearing design variables. It is found that the result is applicable to the capacity of the bearing where an excessive static friction acts between the top and the bump foils. On the other hand, the effects of the detachment and the attachment on the capacity of the bearing without the friction between the two foils could be large in the cases of larger values of rigidity of top foil, preload factor, attached angle of top foil, width diameter ratio and pitch angle of bump-equivalent springs.