US 12,442,410 B2
Airfoil journal bearing
Jinwoo Cho, Suwon-si (KR); Woong Hwang, Suwon-si (KR); and Kyeong Dong Kim, Sejong (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR); and NEUROS CO., LTD., Yuseong-gu (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR); and NEUROS CO., LTD., Daejeon (KR)
Filed on Apr. 26, 2023, as Appl. No. 18/139,668.
Application 18/139,668 is a continuation of application No. PCT/KR2022/015017, filed on Oct. 5, 2022.
Claims priority of application No. 10-2021-0158678 (KR), filed on Nov. 17, 2021.
Prior Publication US 2023/0258228 A1, Aug. 17, 2023
Int. Cl. F16C 17/02 (2006.01); A47L 9/22 (2006.01); H02K 5/167 (2006.01)
CPC F16C 17/024 (2013.01) [A47L 9/22 (2013.01); H02K 5/167 (2013.01); F16C 2380/26 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An airfoil journal bearing comprising:
a bearing housing having an inner circumferential surface forming a hollow through which a rotation shaft is insertable; and
an airfoil that, when the rotation shaft is inserted through the hollow, is between the inner circumferential surface of the bearing housing and an outer circumferential surface of the rotation shaft,
wherein the airfoil comprises:
a first foil region that, when the rotation shaft is inserted through the hollow, extends in a circumferential direction of the rotation shaft in a range from 180 to 360 degrees around the rotation shaft, the first foil region having a first edge in a first axial direction of the rotation shaft and a second edge in a second axial direction of the rotation shaft that is opposite to the first axial direction,
a pair of second foil regions that, when the rotation shaft is inserted through the hollow, extend in in the circumferential direction in a range from 180 to 360 degrees around the rotation shaft, each second foil region comprising a plurality of elastic bumps in the circumferential direction of the rotation shaft on a surface of the respective second foil region,
wherein a first of the second foil regions of the pair of second foil regions extends from the first edge of the first foil region and a second of the second foil regions of the pair of second foil regions extends from the second edge of the first foil region,
wherein the first foil region has a smooth curved surface between the first edge and the second edge that is wider in the first axial direction than each of the pair of second foil regions, and
wherein the first foil region, the second foil regions, and the plurality of elastic bumps of each second foil region are integrally formed together as one body.