Tilting pad journal bearing for use in a turbocharger
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16C-017/00
F16C-017/03
F01D-025/18
F02B-039/14
F16C-033/02
F16C-035/02
F16C-017/26
F16C-027/02
F16C-033/10
F16C-017/18
출원번호
US-0913711
(2014-08-25)
등록번호
US-9822812
(2017-11-21)
국제출원번호
PCT/US2014/052439
(2014-08-25)
국제공개번호
WO2015/034695
(2015-03-12)
발명자
/ 주소
Ryu, Keun
Ashton, Zachary
출원인 / 주소
BorgWarner, Inc.
인용정보
피인용 횟수 :
1인용 특허 :
4
초록▼
A bearing housing (12) for a turbocharger having a rotatable shaft (14) passing through the bearing housing (12) with journal bearings (30) having tilting pads (40) for supporting the rotatable shaft (14) in the bearing housing (12). The tilting pads (40) may have oil supply holes (50) through each
A bearing housing (12) for a turbocharger having a rotatable shaft (14) passing through the bearing housing (12) with journal bearings (30) having tilting pads (40) for supporting the rotatable shaft (14) in the bearing housing (12). The tilting pads (40) may have oil supply holes (50) through each pad (40) to direct lubrication to each pad surface (44). The journal bearings (30) preferably have a circumferential groove (52) on an outer surface of the bearing aligned with the oil supply holes (50) to help feed oil to the oil supply holes (50).
대표청구항▼
1. A single-piece journal bearing (30, 130, 230) that is a fully-floating or semi-floating tilting pad bearing comprising: a bearing outer surface (22) that is adapted to be received by a center bearing housing (12) of a turbocharger (100),a bearing inner surface (20) that is adapted to receive a ro
1. A single-piece journal bearing (30, 130, 230) that is a fully-floating or semi-floating tilting pad bearing comprising: a bearing outer surface (22) that is adapted to be received by a center bearing housing (12) of a turbocharger (100),a bearing inner surface (20) that is adapted to receive a rotating shaft (14) of the turbocharger (100),a first set of tilting pads (40) at one axial end (30a) of the bearing (30, 130, 230) and a second set of tilting pads (40) at another axial end (30b) of the bearing (30, 130, 230) arranged circumferentially about the bearing inner surface (20), wherein the tilting pads (40) are integrally connected with the bearing inner surface (20) by a connecting membrane (42) and rotate, precess, or both relative to the bearing housing (12), anda radially-extending oil supply hole (50) that is formed in the bearing (30, 130, 230) and passes through at least one tilting pad (40) and its corresponding connecting membrane (42). 2. The single-piece journal bearing (30, 130, 230) of claim 1, wherein the connecting membrane (42) is configured to permit the tilting pads (40) to pivot relative to the bearing inner surface (20). 3. The single-piece journal bearing (30, 130, 230) of claim 1, further comprising a groove (52) formed on the bearing outer surface (22) and adapted to feed oil to the oil supply hole (50). 4. The single-piece journal bearing (30, 130, 230) of claim 3, wherein the groove (52) extends circumferentially and is axially aligned with the oil supply hole (50). 5. A turbocharger (100) comprising: a bearing housing (12) defining an axial bore (16);a rotatable shaft (14) disposed in the bore (16),a single-piece journal bearing (30, 130, 230) that is fully-floating or semi-floating disposed in the bore (16) and configured to rotatably support the shaft (14), the bearing (30, 130, 230) including a bearing outer surface (22),a bearing inner surface (20),a first set of tilting pads (40) at one axial end (30a) of the bearing (30, 130, 230) and a second set of tilting pads (40) at another axial end (30b) of the bearing (30, 130, 230) arranged circumferentially about the bearing inner surface (20), wherein the tilting pads (40) are integrally connected with the bearing inner surface (20) by a connecting membrane (42) and rotate, precess, or both relative to the bearing housing (12), anda radially-extending oil supply hole (50) that is formed in the bearing (30, 130, 230) and passes through at least one tilting pad (40) and its corresponding connecting membrane (42). 6. The turbocharger (100) of claim 5, wherein the connecting membrane (42) is configured to permit the tilting pads (40) to pivot relative to the bearing inner surface (20). 7. The turbocharger (100) of claim 5, further comprising a groove (52) formed on the bearing outer surface (22) and adapted to feed oil to the oil supply hole (50). 8. The turbocharger (100) of claim 7, wherein the groove (52) extends circumferentially and is axially aligned with the oil supply hole (50). 9. The turbocharger of claim 5 wherein rotation of the rotatable shaft (14) pulls oil through each tilting pad (40) via the oil supply holes (50) to each pad surface (44). 10. A turbocharger (100) comprising: a bearing housing (12) defining an axial bore (16);a rotatable shaft (14) disposed in the bore (16),a single-piece journal bearing (10, 30, 130, 230) that is fully-floating or semi-floating disposed in the bore (16) and configured to rotatably support the shaft (14), the bearing including a bearing outer surface (22) that is spaced apart from an inner surface of the bore (16),a bearing inner surface (20),a first set of tilting pads (40) at one axial end (30a) of the bearing (30, 130, 230) and a second set of tilting pads (40) at another axial end (30b) of the bearing (30, 130, 230) arranged circumferentially about the bearing inner surface (20), wherein the tilting pads (40) are integrally connected with the bearing inner surface (20) by a connecting membrane (42) and rotate, precess, or both relative to the bearing housing (12),wherein the journal bearing is disposed in the bore (16) in a manner such that the journal bearing is free to rotate, precess, or both relative to both the inner surface of the bore (16) and an outer surface of the shaft (14). 11. The turbocharger (100) of claim 10, comprising an oil lubrication path (50) formed in the bearing housing and configured to deliver oil to the journal bearing (130), wherein an outer oil layer (26) is formed between the bearing outer surface and a surface of bore (16),an inner oil layer (24) is formed between the bearing inner surface and the shaft (14), andboth the inner oil layer (24) and the outer oil layer (26) function as a bearing surface during operation of the turbocharger (100).
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이 특허에 인용된 특허 (4)
Barlog, Daniel J., Bearing retention assembly for and method of assembling turbochargers.
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