US 12,345,293 B2
Thrust foil bearing
Tsutomu Iida, Tokyo (JP); Seiichiro Yoshinaga, Tokyo (JP); Masahiro Nakajima, Tokyo (JP); Shigekazu Aoyama, Tokyo (JP); and Naomichi Omori, Tokyo (JP)
Assigned to IHI Corporation, Tokyo (JP)
Appl. No. 18/027,899
Filed by IHI Corporation, Tokyo (JP)
PCT Filed Sep. 22, 2021, PCT No. PCT/JP2021/034847
§ 371(c)(1), (2) Date Mar. 22, 2023,
PCT Pub. No. WO2022/065375, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 2020-159534 (JP), filed on Sep. 24, 2020.
Prior Publication US 2023/0366429 A1, Nov. 16, 2023
Int. Cl. F16C 17/04 (2006.01)
CPC F16C 17/042 (2013.01) 6 Claims
OG exemplary drawing
 
1. A thrust foil bearing comprising:
a base plate including an insertion hole through which a shaft is inserted, and a supporting surface expanding in a direction orthogonal to an axial direction of the insertion hole;
a step member placed on the supporting surface and formed of a different body from the base plate; and
a back foil extending in a circumferential direction of the insertion hole and in which one part of the back foil is supported by the supporting surface and another part of the back foil next to the one part in the circumferential direction is supported by the step member, wherein
the back foil includes a plurality of mountain parts and a plurality of valley parts that are alternately formed,
the step member includes first surfaces having different heights in the axial direction, and a second surface connecting the first surfaces next to each other, and
at least two valley parts of the plurality of valley parts are supported by the first surfaces.
 
6. A thrust foil bearing comprising:
a base plate including an insertion hole through which a shaft is inserted, and a supporting surface expanding in a direction orthogonal to an axial direction of the insertion hole;
a step member placed on the supporting surface and formed of a different body from the base plate; and
a back foil extending in a circumferential direction of the insertion hole and in which one part of the back foil is supported by the supporting surface and another part of the back foil next to the one part in the circumferential direction is supported by the step member,
wherein an annular member is attached to the base plate, and the step member is sandwiched between the base plate and the annular member.