Invention Grant
- Patent Title: Bearing assembly for a turbocharger, and a method for manufacturing a bearing assembly for a turbocharger
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Application No.: US15030693Application Date: 2014-10-21
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Publication No.: US09784315B2Publication Date: 2017-10-10
- Inventor: Tsuyoshi Koda , Goro Nakao
- Applicant: NTN CORPORATION
- Applicant Address: JP Osaka
- Assignee: NTN Corporation
- Current Assignee: NTN Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2013-219371 20131022
- International Application: PCT/JP2014/077955 WO 20141021
- International Announcement: WO2015/060304 WO 20150430
- Main IPC: F16C33/58
- IPC: F16C33/58 ; F16C33/66 ; F16C19/54 ; F01D25/16 ; F16C27/04 ; F16C35/067 ; F16C35/12 ; F16C19/16

Abstract:
A bearing assembly for a turbocharger includes a turbine wheel-side ball bearing at a first axial end of a tubular body, a compressor impeller-side ball bearing at a second axial end of the tubular body, and a bearing housing. The bearing housing includes a first opposed wall opposed to an axially outer side of an outer race of the turbine wheel-side ball bearing, and a second opposed wall opposed to an axially outer side of an outer race of the compressor impeller-side ball bearing. The outer race of the turbine wheel-side ball bearing and the outer race of the compressor impeller-side ball bearing have axially outer end surfaces which are axially outwardly displaced from respective axial end surfaces of the tubular body so that oil films are present between the respective outer races and the corresponding opposed walls.
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