Patent ID: 8944688
Filing Date: 2015-02-03
Classification: F16C

Abstract:
1. A radial foil bearing that, by being fitted on a rotating shaft, supports the rotating shaft, comprising: a cylindrical top foil that is arranged facing the rotating shaft; a back foil that is arranged on the outer side of the top foil in the radial direction; and a cylindrical bearing housing that houses the top foil and the back foil in the state of being inserted therein, wherein, an engagement notch that extends from the inner circumferential edge to the outer circumferential edge of the bearing housing is formed at both sides of the bearing housing, and an engagement protruding piece that engages with each engagement notch is provided at both side end portions of the back foil on one side in the circumferential direction of the bearing housing; wherein an engagement groove with a depth that is shallower than the engagement notch is formed in the inner circumferential surface of the bearing housing, between the opposing pair of engagement notches; an engagement protrusion with a height that is lower than the engagement protruding piece is formed on the back foil between the engagement protruding pieces; and along with the engagement protruding piece engaging in the engagement notch, the engagement protrusion engages in the engagement groove.