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Title:
DYNAMIC PRESSURE BEARING, AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2019/172244
Kind Code:
A1
Abstract:
A dynamic pressure bearing 8 is provided with dynamic pressure generating portions A1, A2 provided in a region 8a in which a bearing gap is formed between a green compact 10 of a starting material powder M containing, as a main component, a metal powder capable of forming an oxide film 12, and a supported portion 2a1 of the surface of the green compact 10, and an oxide film 12 formed between particles 11 of the metal powder, wherein the dynamic pressure bearing exhibits a radial crushing strength at least equal to 150 MPa. Here, the metal powder exhibits a particle size distribution in which the proportion of the entire metal powder occupied by metal powder having a particle size at least equal to 100 μm is at least equal to 30 wt%, and the cumulative 50% diameter is at least equal to 50 μm and at most equal to 100 μm.

Inventors:
KOMATSUBARA Shinji (3066 Aza Oyumida, Oaza Higashikata, Kuwana-sh, Mie 78, 〒5118678, JP)
Application Number:
JP2019/008611
Publication Date:
September 12, 2019
Filing Date:
March 05, 2019
Export Citation:
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Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
International Classes:
F16C33/12; B22F1/00; B22F3/24; B22F3/26; B22F5/00; F16C17/10; F16C33/10; F16C33/14
Domestic Patent References:
WO2016084546A12016-06-02
Foreign References:
JP2012031965A2012-02-16
JP2016141815A2016-08-08
JP2017179491A2017-10-05
JP2016211690A2016-12-15
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (Ehara Patent Office, 2-15 Bakurou-machi 4-chome, Chuo-ku, Osaka-sh, Osaka 59, 〒5410059, JP)
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