Radial foil bearing with multiple bearing surfaces and contact angle definition

The invention relates to a radial foil bearing having an outer ring (2) and three foil groups formed by corrugated foils (3) and top foils (4), said radial foil bearing (1) being operable in only one direction of rotation (11) wherein a first end (6) of each top foil (4) is firmly connected to said outer ring (2) and a second end (7) of each top foil (4) is firmly connected to said outer ring (2). A second end (7) of each top foil (4) opposite the first end (6) can be moved freely, and wherein a shaft (9) to be supported can be brought into contact with the top foil (4) within an angular range (10) of the freely movable second end (7) of the top foil (4), or the envelope circle (15) of the radial foil bearing (1) is in contact with at least one top foil (4) within the angular range (10), the top foil (4) of one foil group (8) overlapping the top foil (4) of the foil group (8) following the one foil group in the circumferential direction at a radial distance. 本发明涉及一种具有外环(2)和三个箔片组的径向箔片轴承，箔片组由波纹箔片(3)和顶部箔片(4)形成，所