Title:
転がり軸受、および風力発電用主軸支持装置
Document Type and Number:
Japanese Patent JP7373341
Kind Code:
B2
Abstract:
To provide a rolling bearing having a hard film on an inner ring raceway surface and an outer ring raceway surface of the rolling bearing that improves peeling resistance of the hard film, shows the original property of the hard film, and suppresses the attackability to a mating material. A rolling bearing 1 has an inner ring 2 having an inner ring raceway surface 2a on an outer circumference, an outer ring 3 having an outer ring raceway surface 3a on an inner circumference, and rolling elements 4 that roll between the inner ring raceway surface 2a and the outer ring raceway surface 3a. A hard film 8 includes a foundation layer formed directly on the inner ring raceway surface 2a or the outer ring raceway surface 3a and mainly formed of Cr and WC, a mixed layer having a gradient composition formed on the foundation layer and mainly formed of WC and DLC, and a surface layer formed on the mixed layer and mainly formed of DLC. In a roughness curve of a surface on which the foundation layer is formed, the arithmetical mean roughness Ra is 0.3 µm or less and the root mean square gradient RΔq is 0.05 or less.
Inventors:
Masaki Nakanishi
Hidenobu Mikami
Hidenobu Mikami
Application Number:
JP2019174939A
Publication Date:
November 02, 2023
Filing Date:
September 26, 2019
Export Citation:
Assignee:
ntn corporation
International Classes:
F16C33/64; C23C14/06; F03D80/70; F16C23/08; F16C33/32
Domestic Patent References:
| JP2018146108A | ||||
| JP2007269121A | ||||
| JP2011196543A | ||||
| JP2013092175A | ||||
| JP2014190508A | ||||
| JP2016196958A | ||||
| JP2017150597A |
Foreign References:
| WO2005050038A1 | ||||
| WO2017164325A1 |
Attorney, Agent or Firm:
Wake Hikari
Wake Misao
Wake Misao