Patent ID: 9568042
Date: 2017-02-14
CPC Classifications: F16C

Claim:
1. A radial foil bearing used for supporting a rotary shaft so as to encircle the rotary shaft, the radial foil bearing comprising: a cylindrical top foil disposed so as to face the rotary shaft; an intermediate foil disposed outside of the top foil in a radial direction thereof; a back foil disposed outside of the intermediate foil in the radial direction; and a cylindrical bearing housing accommodating the top foil, the intermediate foil and the back foil, wherein a plurality of pairs of engagement recesses are formed in the bearing housing, each pair of engagement recesses are positioned on both side surfaces of the bearing housing so as to be opposite to each other, each engagement recess extends from an inner circumferential surface toward an outer circumferential surface of the bearing housing, and the plurality of pairs of engagement recesses are disposed in a circumferential direction of the bearing housing, wherein the intermediate foil includes intermediate foil pieces disposed in the circumferential direction of the bearing housing, wherein an engagement-projecting piece engaging with the engagement recess is formed in each intermediate foil piece, wherein an engagement notch communicating with the engagement recess is formed on each of both side edges of the back foil, and wherein the engagement-projecting piece of the intermediate foil piece engages with the engagement recess through the engagement notch of the back foil.