Foil bearing

Patent metadata

Field	Value
Publication number	US-2016265437-A1
Application number	US-201615158894-A
Country	US
Kind code	A1
Filing date	May 19, 2016
Priority date	Dec 19, 2012
Publication date	Sep 15, 2016
Grant date	—

Abstract

A foil bearing includes an outer member ( 11 ), and a plurality of foils ( 13 ) that are mounted to an inner circumferential surface ( 11 a ) of the outer member ( 11 ) and directly face the inner circumferential surface ( 11 a ) of the outer member ( 11 ) in a radial direction without interposition of another member (such as back foils). The foils ( 13 ) each include: holding portions ( 13 a, 13 b ) that are formed at both circumferential ends and held while in contact with the outer member ( 11 ); and a body portion ( 13 c ) that is formed circumferentially between the holding portions ( 13 a, 13 b ) and has a bearing surface (A). At least an end portion on one side in a circumferential direction of the body portion ( 13 c ) is raised radially inward with respect to the inner circumferential surface ( 11 a ) of the outer member ( 11 ).

First claim

1 - 11 . (canceled)

12 . A foil bearing, comprising:
an outer member that has an inner circumferential surface having a cylindrical surface shape; and a plurality of foils that are mounted to the inner circumferential surface of the outer member, the foil bearing being configured to radially support a shaft which rotates to one side in a circumferential direction with respect to the outer member, wherein the plurality of foils each comprise:
holding portions that are formed at both circumferential ends and held while in contact with the outer member; and
a body portion that is formed circumferentially between the holding portions and has a bearing surface, and
wherein the holding portion on the one side in the circumferential direction of the each of the plurality of foils is inserted to a fixing groove formed in the inner circumferential surface of the outer member.

13 . The foil bearing according to claim 12 , wherein the holding portion on another side in the circumferential direction of the each of the plurality of foils is arranged between adjacent foil and the inner circumferential surface of the outer member.

14 . The foil bearing according to claim 12 , wherein the fixing groove is inclined radially outward to the one side in the circumferential direction.

15 . The foil bearing according to claim 12 , wherein the holding portion on the one side in the circumferential direction of the each of the plurality of foils comprises a projecting portion formed by extending an axial partial region of the body portion to the one side in the circumferential direction.

16 . The foil bearing according to claim 15 , wherein the holding portion on the one side in the circumferential direction of the each of the plurality of foils comprises a plurality of the projecting portions formed apart from each other in an axial direction.

17 . The foil bearing according to claim 12 , wherein the holding portions of the each of the plurality of foils are slidable against the outer member.

Assignees

• Yoshino Masato
• Fujiwara Hiroki
• Ntn Toyo Bearing Co Ltd

Inventors

• Yoshino Masato
• Fujiwara Hiroki

Classifications

• F16C2226/76

  with tongue and groove or key and slot · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F01D25/166 Primary

  Sliding contact bearing (gas bearings F01D25/22) · CPC title

• F02C3/08

  the compressor comprising at least one radial stage (F02C3/10 takes precedence) · CPC title

• F16C32/0603 Primary

  supported by a gas cushion, e.g. an air cushion · CPC title