# US 2021/0341012 A1 · Thurst foil bearing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0341012 A1 - Document ID: US20210341012A1 - Status: Published application - Kind: A1 - Application number: 17/375,277 - Filed: 2021-07-14 - Published: 2021-11-04 - Earliest claimed: 2019-01-17 - Assignees: IHI Corporation - Applicants: Ihi Corporation - Inventors: Naomichi OMORI - Web page: https://patentgrep.com/patent/US20210341012A1 ## CPC - F16C 17/042: {with flexible leaves to create hydrodynamic wedge, e.g. axial foil bearings} - F16C 37/002: {of fluid bearings} - F16C 27/02: Sliding-contact bearings - F16C 2360/23: Gas turbine engines - F16C 2360/24: Turbochargers - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS ## Abstract A thrust foil bearing includes a foil which faces a thrust collar mounted on a shaft in an axial direction, and a case which supports the foil and surrounds the thrust collar, wherein a cooling hole is formed in the case. ## Claims ### Claim 1 A thrust foil bearing comprising: a foil which faces a thrust collar mounted on a shaft in an axial direction; and a case which supports the foil and surrounds the thrust collar, wherein a cooling hole is formed in the case. ### Claim 2 (depends on 1) The thrust foil bearing according to claim 1, wherein an insertion hole through which the shaft is inserted is formed in the case, and the cooling hole is formed on an outer peripheral side of the case in a radial direction of the insertion hole. ### Claim 3 (depends on 2) The thrust foil bearing according to claim 2, wherein the case includes a base plate which supports the foil and has the insertion hole formed therein, and an annular bearing spacer which is mounted on an outer peripheral side of the base plate. ### Claim 4 (depends on 3) The thrust foil bearing according to claim 3, wherein at least one of a first cooling hole located at an axial position of the thrust collar and a second cooling hole located at an axial position of the foil is formed as the cooling hole in the bearing spacer. ### Claim 5 (depends on 3) The thrust foil bearing according to claim 3, wherein at least one of a third cooling hole which overlaps the foil in the axial direction and a fourth cooling hole which does not overlap the foil in the axial direction is formed as the cooling hole in the base plate. ### Claim 6 (depends on 1) The thrust foil bearing according to claim 1, wherein the cooling hole is inclined in a rotation direction of the thrust collar as it goes from an outer side in a radial direction to an inner side in the radial direction. ### Claim 7 (depends on 1) The thrust foil bearing according to claim 1, wherein the cooling hole is inclined in a direction opposite to a rotation direction of the thrust collar as it goes from an outer side in a radial direction to an inner side in the radial direction. ### Claim 8 (depends on 1) The thrust foil bearing according to claim 1, wherein the cooling hole is inclined in a rotation direction of the thrust collar as it goes from the base plate of the case toward the thrust collar in the axial direction. ### Claim 9 (depends on 1) The thrust foil bearing according to claim 1, wherein the cooling hole is inclined in a direction opposite to a rotation direction of the thrust collar as it goes from the base plate of the case toward the thrust collar in the axial direction. ### Claim 10 (depends on 1) The thrust foil bearing according to claim 1, wherein unevenness is formed on an outer peripheral surface of the thrust collar. ### Claim 11 (depends on 4) The thrust foil bearing according to claim 4, wherein at least one of a third cooling hole which overlaps the foil in the axial direction and a fourth cooling hole which does not overlap the foil in the axial direction is formed as the cooling hole in the base plate. ### Claim 12 (depends on 2) The thrust foil bearing according to claim 2, wherein the cooling hole is inclined in a rotation direction of the thrust collar as it goes from an outer side in a radial direction to an inner side in the radial direction. ### Claim 13 (depends on 3) The thrust foil bearing according to claim 3, wherein the cooling hole is inclined in a rotation direction of the thrust collar as it goes from an outer side in a radial direction to an inner side in the radial direction. ### Claim 14 (depends on 4) The thrust foil bearing according to claim 4, wherein the cooling hole is inclined in a rotation direction of the thrust collar as it goes from an outer side in a radial direction to an inner side in the radial direction. ### Claim 15 (depends on 5) The thrust foil bearing according to claim 5, wherein the cooling hole is inclined in a rotation direction of the thrust collar as it goes from an outer side in a radial direction to an inner side in the radial direction. ### Claim 16 (depends on 11) The thrust foil bearing according to claim 11, wherein the cooling hole is inclined in a rotation direction of the thrust collar as it goes from an outer side in a radial direction to an inner side in the radial direction. ### Claim 17 (depends on 2) The thrust foil bearing according to claim 2, wherein the cooling hole is inclined in a direction opposite to a rotation direction of the thrust collar as it goes from an outer side in a radial direction to an inner side in the radial direction. ### Claim 18 (depends on 3) The thrust foil bearing according to claim 3, wherein the cooling hole is inclined in a direction opposite to a rotation direction of the thrust collar as it goes from an outer side in a radial direction to an inner side in the radial direction. ### Claim 19 (depends on 4) The thrust foil bearing according to claim 4, wherein the cooling hole is inclined in a direction opposite to a rotation direction of the thrust collar as it goes from an outer side in a radial direction to an inner side in the radial direction. ### Claim 20 (depends on 5) The thrust foil bearing according to claim 5, wherein the cooling hole is inclined in a direction opposite to a rotation direction of the thrust collar as it goes from an outer side in a radial direction to an inner side in the radial direction.