Title:
ROLLING BEARING, AND MAIN SHAFT SUPPORT DEVICE FOR WIND POWER GENERATION
Document Type and Number:
WIPO Patent Application WO/2020/067334
Kind Code:
A1
Abstract:
Provided is a rolling bearing that has a hard film on the inner/outer ring raceway surface etc. of the rolling bearing, that improves the peel-off resistance of the hard film and exhibits characteristics inherent in the film, and that suppresses aggressiveness with respect to a mating material. A rolling bearing 1 comprises: an inner ring 2 having an inner ring raceway surface 2a on the outer periphery; an outer ring 3 having an outer ring raceway surface 3a on the inner periphery; and a plurality of rolling bodies 4 that roll between the inner ring raceway surface 2a and the outer ring raceway surface 3a. A hard film 8 is a structure made of: an underlayer that is formed directly on the inner ring raceway surface 2a and the outer ring raceway surface 3a and is composed mainly of Cr and WC; a mixed layer that is formed on the underlayer and is a graded composition composed mainly of WC and DLC; and a surface layer that is formed on the mixed layer and composed mainly of DLC. The arithmetic mean roughness Ra of a roughness curve on the surface of the hard film where the underlayer is formed is 0.3 μm or less, and the root mean square slope R∆q is 0.05 or less.
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Inventors:
NAKANISHI MASAKI (JP)
MIKAMI HIDENOBU (JP)
MIKAMI HIDENOBU (JP)
Application Number:
PCT/JP2019/037948
Publication Date:
April 02, 2020
Filing Date:
September 26, 2019
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C33/30; C01B32/28; C01B32/907; F16C19/06; F16C33/32; F16C33/62; F16C33/64
Domestic Patent References:
| WO2005050038A1 | 2005-06-02 | |||
| WO2017164325A1 | 2017-09-28 |
Foreign References:
| JP2018146108A | 2018-09-20 | |||
| JP2007269121A | 2007-10-18 | |||
| JP2011196543A | 2011-10-06 | |||
| JP2013092175A | 2013-05-16 | |||
| JP2014190508A | 2014-10-06 | |||
| JP2016196958A | 2016-11-24 | |||
| JP2017150597A | 2017-08-31 | |||
| JP4178826B2 | 2008-11-12 | |||
| JP3961739B2 | 2007-08-22 |
Attorney, Agent or Firm:
WAKI Hikaru et al. (JP)
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