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Title:
BEARING DEVICE FOR TURBOCHARGER, AND METHOD FOR MANUFACTURING BEARING DEVICE FOR TURBOCHARGER
Document Type and Number:
WIPO Patent Application WO/2015/060304
Kind Code:
A1
Abstract:
Provided is a bearing device for a turbocharger, the bearing device being configured so that, when a turbine shaft vibrates, a pair of ball bearings which supports the turbine shaft is not likely to generate heat or wear abnormally. A bearing device (1) for a turbocharger has a turbine wheel-side ball bearing (7) which is disposed at one axial end of a cylinder body (5), a compressor impeller-side ball bearing (8) which is disposed at the other axial end of the cylinder body (5), and a bearing housing (6). The bearing housing (6) has a facing wall (31) which faces the axial outer side of the outer ring (10) of the turbine wheel-side ball bearing (7), and a facing wall (32) which faces the axial outer side of the outer ring (10) of the compressor impeller-side ball bearing (8). The outer ring (10) of the turbine wheel-side ball bearing (7) and the outer ring (10) of the compressor impeller-side ball bearing (8) have axial end surfaces (10a) offset closer to the axial outer side than the axial end surfaces (5a) of the cylinder body (5) so that oil films (f2) are formed between the outer rings (10) and the facing walls (31, 32).

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Inventors:
KODA TSUYOSHI (JP)
NAKAO GORO (JP)
Application Number:
PCT/JP2014/077955
Publication Date:
April 30, 2015
Filing Date:
October 21, 2014
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F02B39/00; F16C27/00; F16C33/58; F16C33/64; F16C35/077
Domestic Patent References:
WO2010109653A12010-09-30
Foreign References:
JPS63186934U1988-11-30
JPS60137131U1985-09-11
JP2005335455A2005-12-08
JPS6235195U1987-03-02
JPH0472424A1992-03-06
JPH048825A1992-01-13
JPH0640908Y21994-10-26
JPH0575000B21993-10-19
Other References:
See also references of EP 3061942A4
Attorney, Agent or Firm:
KAMADA Naoya et al. (JP)
Naoya Kamata (JP)
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