Patent ID: 11940005
Assignee: IHI CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 8:
9. A radial foil bearing comprising:
a bearing housing which has an insertion hole therein;
a top foil which is disposed inside the insertion hole; and
a foil structure which is interposed between the top foil and the bearing housing,
wherein the foil structure has a folded protruding portion that is bent outward in a radial direction of the insertion hole and is bent back inward in the radial direction,
the folded protruding portion is in contact with an inner surface of a fitting groove formed in an end surface of the bearing housing in an axial direction in an energy storing state and is fitted to the fitting groove, the axial direction being a direction in which the insertion hole extends,
the folded protruding portion is provided at each of end edges of the foil structure on both sides in the axial direction, and
the foil structure has a hole portion provided between the folded protruding portions formed at the end edges on both sides in the axial direction.