| 摘要 |
The radial foil bearing (3, 3A) for surrounding and supporting a rotary shaft (1) includes a cylindrical top foil (10) disposed so as to face the rotary shaft (1), a back foil (11) disposed at a radially outer side of the top foil (10), and a cylindrical bearing housing (12) accommodating the top foil (10) and the back foil (11). Engagement-projecting portions (15) are provided on both ends of an inner circumferential surface of the bearing housing (12) in the axial direction of the radial foil bearing (3, 3A). Engagement notches (16) engaging with the engagement-projecting portions (15) are formed on both ends of the back foil (11) in the axial direction of the radial foil bearing. The engagement-projecting portions (15) are formed using electric discharge machining, wire-cut electric discharge machining, or a combination thereof on both ends of the inner circumferential surface of the cylindrical bearing housing (12) in the axial direction of the radial foil bearing (3, 3A). |
