Oil-free turbocharger bearing assembly having conical shaft supported on compliant gas bearings
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16C-032/06
F16C-033/04
F16C-017/10
출원번호
US-0432814
(2013-10-02)
등록번호
US-9394941
(2016-07-19)
국제출원번호
PCT/US2013/062950
(2013-10-02)
국제공개번호
WO2014/062373
(2014-04-24)
발명자
/ 주소
Ryu, Keun
출원인 / 주소
BorgWarner Inc.
대리인 / 주소
Young Basile Hanlon & MacFarlane P.C.
인용정보
피인용 횟수 :
0인용 특허 :
14
초록
This invention provides a turbocharger bearing assembly having foil bearing assemblies (21, 22, 23, 24, 30, 35, 36, 37, 40, 41, 42, 45, 46, 47, 50, 52) supporting conical rotor elements (3, 4, 10, 11, 16, 17, 31, 32).
대표청구항▼
1. A hydrodynamic foil gas bearing assembly (21, 22, 23, 24, 30, 35, 36, 37, 40, 41, 42, 45, 46, 47, 50, 52) suitable for supporting a rotatable shaft (7, 14, 18, 43, 49, 53) therein, wherein the hydrodynamic foil gas bearing assembly (21, 22, 23, 24, 30, 35, 36, 37, 40, 41, 42, 45, 46, 47, 50, 52)
1. A hydrodynamic foil gas bearing assembly (21, 22, 23, 24, 30, 35, 36, 37, 40, 41, 42, 45, 46, 47, 50, 52) suitable for supporting a rotatable shaft (7, 14, 18, 43, 49, 53) therein, wherein the hydrodynamic foil gas bearing assembly (21, 22, 23, 24, 30, 35, 36, 37, 40, 41, 42, 45, 46, 47, 50, 52) comprises: a. two conical rotor elements (3, 4, 10, 11, 16, 17, 31, 32), each having a small circular end and a large circular end; andb. at least two foil bearings (21, 22, 23, 24, 30, 35, 36, 37, 40, 41, 42, 45, 46, 47, 50, 52) having at least one compliant component (22, 36, 45) and at least one top foil (24, 42, 47) positioned atop the at least one compliant component (22, 36, 45), in which the conical rotor elements (3, 4, 10, 11, 16, 17, 31, 32) make end-to-end contact when placed upon the rotatable shaft (7, 14, 18, 43, 49, 53) disposed within the hydrodynamic foil gas bearing assembly (21, 22, 23, 24, 30, 35, 36, 37, 40, 41, 42, 45, 46, 47, 50, 52) and in which the ends of the conical rotor elements (3, 4, 10, 11, 16, 17, 31, 32) which are in contact are of the same size. 2. The bearing assembly (21, 22, 23, 24, 30, 35, 36, 37, 40, 41, 42, 45, 46, 47, 50, 52) according to claim 1 in which the compliant component (22, 36, 45) is selected from a group consisting of bump foil (22, 40, 45), metal mesh damper (36), and hemisphere convex foil. 3. The bearing assembly according to claim 1 in which the conical rotor elements (3, 4, 10, 11, 16, 17, 31, 32) are of unequal size. 4. The bearing assembly according to claim 3 in which the small ends of the conical rotor elements (3, 4, 16, 17) are placed together. 5. The bearing assembly according to claim 3 in which the large ends of the conical rotor elements (10, 11) are placed together. 6. The bearing assembly according to claim 3 further comprising a shim foil (23, 35, 50, 52). 7. The bearing assembly according to claim 1 in which the small ends of the conical rotor elements (3, 4, 16, 17) are placed together. 8. The bearing assembly according to claim 1 in which the large ends of the conical rotor elements (10, 11) are placed together. 9. The bearing assembly according to claim 1 further comprising a bearing housing (20). 10. The bearing assembly according to claim 9 in which the small ends of the conical rotor elements (3, 4, 16, 17) are placed together. 11. The bearing assembly according to claim 9 in which the large ends of the conical rotor elements (10, 11) are placed together. 12. The bearing assembly according to claim 8 in which the bearing housing has at least one air inlet port (33) for each conical rotor element (3, 4, 10, 11, 16, 17, 31, 32). 13. The bearing assembly according to claim 1 in which the top foil is coated with a solid lubricant selected from the group consisting of polyimide, graphite, polytetraflouroethylene, and molybdenum disulfide. 14. The bearing assembly according to claim 1 further comprising a shim foil (23, 35, 50, 52). 15. The bearing assembly according to claim 1 in which the conical rotor elements (3, 4, 10, 11, 16, 17, 31, 32) are coated with a lubricant selected from the group consisting of polyimide, graphite, polytetraflouroethylene (PTFE), molybdenum disulfide (MoS2), PS304 and PS400.
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이 특허에 인용된 특허 (14)
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