Title:
METHOD FOR DESIGNING FRICTION BETWEEN SLIDING MEMBERS, METHOD FOR MANAGING SURFACE ROUGHNESS, AND METHOD FOR MANUFACTURING SLIDING MECHANISM
Document Type and Number:
WIPO Patent Application WO/2021/215050
Kind Code:
A1
Abstract:
In the present invention, the sliding friction that occurs between sliding surfaces of two sliding members lubricated with a lubricant can be accurately estimated. A friction designing method which defines a coefficient of friction μ in a model of sliding surfaces corresponding to the mutual sliding surfaces of two sliding members (2, 3) lubricated with a lubricant (Step S1), determines the correlation between the coefficient of friction μ and an oil film parameter (Λ (Rk) or Λ(Rk+Rpk)) provided as a parameter indicating a surface roughness in the model of sliding surfaces and computed using the core roughness depth (Rk) or the sum of the core roughness depth (Rk) and the reduced peak height (Rpk) (Step S2), and, on the basis of the correlation, defines a target value for the surface roughness of the sliding surfaces to be managed for the product (Steps S3 to S6).
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Inventors:
MURATA YOHEI (JP)
MOTODA TOMOHIRO (JP)
UYAMA HIDEYUKI (JP)
MOTODA TOMOHIRO (JP)
UYAMA HIDEYUKI (JP)
Application Number:
PCT/JP2020/047976
Publication Date:
October 28, 2021
Filing Date:
December 22, 2020
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16C17/24; F16C19/36; F16C33/14; F16C33/58; G06F30/10
Foreign References:
| JP2008045573A | 2008-02-28 | |||
| JP2003004043A | 2003-01-08 | |||
| JPH084770A | 1996-01-09 | |||
| JP2014095392A | 2014-05-22 | |||
| JP2007321806A | 2007-12-13 | |||
| JP2005076675A | 2005-03-24 | |||
| JP2002106552A | 2002-04-10 | |||
| JP2001263443A | 2001-09-26 | |||
| JP2000179559A | 2000-06-27 |
Other References:
S. AIHARA: "A new running torque formula for tapered roller bearings under axial load", TRANSACTIONS OF THE ASME. JOURNAL OF TRIBOLOGY, vol. 109, 1987, pages 471 - 478
YUJI YAMAMOTOMOTOHIRO KANETA, TRIBOLOGY, pages 124
TOKUNAGASUGIMURAYAMAMOTO: "Development and performance verification in mechanical seals with friction reduction and sealing mechanism: Experimental Study", JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS, vol. 60, no. 5, 2015, pages 332
KANETA: "Micro-EHL", JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS, vol. 35, no. 1, 1990, pages 8
I. KRUPKAR. POLISCUKM. HARTL: "Behavior of thin viscous boundary films in lubricated contacts between micro-textured surfaces", TRIBOLOGY INT., vol. 42, 2009, pages 535, XP025918245, DOI: 10.1016/j.triboint.2008.03.013
MAEDAMARUYAMANAKANO: "Simultaneous Measurement of Film Thickness and Fracture Rate in EHD Contact", TRIBOLOGY CONFERENCE 2017 FALL IN TAKAMATSU, PROCEEDINGS, vol. A39
See also references of EP 4141276A4
YUJI YAMAMOTOMOTOHIRO KANETA, TRIBOLOGY, pages 124
TOKUNAGASUGIMURAYAMAMOTO: "Development and performance verification in mechanical seals with friction reduction and sealing mechanism: Experimental Study", JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS, vol. 60, no. 5, 2015, pages 332
KANETA: "Micro-EHL", JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS, vol. 35, no. 1, 1990, pages 8
I. KRUPKAR. POLISCUKM. HARTL: "Behavior of thin viscous boundary films in lubricated contacts between micro-textured surfaces", TRIBOLOGY INT., vol. 42, 2009, pages 535, XP025918245, DOI: 10.1016/j.triboint.2008.03.013
MAEDAMARUYAMANAKANO: "Simultaneous Measurement of Film Thickness and Fracture Rate in EHD Contact", TRIBOLOGY CONFERENCE 2017 FALL IN TAKAMATSU, PROCEEDINGS, vol. A39
See also references of EP 4141276A4
Attorney, Agent or Firm:
TANAKA Hidetetsu et al. (JP)
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