| 摘要 |
A dynamic foil gas bearing (50) includes a foil group (57) comprising a corrugated-sheet-like bump foil (58), a flat-sheet-like middle foil (59), and a flat-sheet-like top foil (60) which are arranged successively toward the center axis of a bearing case (56A). The top foil (60) includes a second linkage surface (60b) joined to a second fixed surface (60a) fixed to an inner circumferential surface (56a) of the bearing case (56A) and also joined to a second rotatable shaft holding surface (60c). The second linkage surface (60b) is provided by a curved portion of the top foil (60) which is convex toward the center axis of the bearing case (56A). The middle foil (59) includes a first linkage surface (59b) joined to a first fixed surface (59a) fixed to the inner circumferential surface (56a) of the bearing case (56A) and also joined to a first rotatable shaft holding surface (59c). The first linkage surface (59b) is provided by a bent straight portion of the middle foil (59).
|
