Title:
ROLLING MACHINE ELEMENT FATIGUE DIAGNOSIS METHOD AND ROLLING MACHINE ELEMENT FATIGUE DIAGNOSIS SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/255476
Kind Code:
A1
Abstract:
[Problem] To provide a method and system that make it possible to ascertain a fatigue state before a bearing part is damaged and to diagnose the fatigue state without disassembling a rolling bearing. [Solution] Without a rolling machine element being disassembled, a magnetic sensor disposed in the vicinity of a component is used to measure the magnetic flux density in the axial direction and radial direction of the component, the amount of change from a standard magnetic flux density corresponding to the magnetic flux density before the component was first used is calculated, and the fatigue progress of the rolling machine element is determined from the amount of change.
Inventors:
KOBAYASHI DAISUKE (JP)
ONO KOICHIRO (JP)
ONO KOICHIRO (JP)
Application Number:
PCT/JP2020/004419
Publication Date:
December 24, 2020
Filing Date:
February 05, 2020
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
G01N27/72
Foreign References:
| JP2018194433A | 2018-12-06 | |||
| JP2020024172A | 2020-02-13 | |||
| JP2019184540A | 2019-10-24 | |||
| JP2013076617A | 2013-04-25 | |||
| JP2013160561A | 2013-08-19 | |||
| JP2009198251A | 2009-09-03 | |||
| JP2014219329A | 2014-11-20 | |||
| JP2008032677A | 2008-02-14 | |||
| US20030070492A1 | 2003-04-17 | |||
| JP2012042338A | 2012-03-01 | |||
| JPS6334423B2 | 1988-07-11 | |||
| JP2009041993A | 2009-02-26 |
Other References:
OGUMA N : "Prediction of residual fatigue life of bearings, Part 1: Application of X-ray diffraction method", KOYO ENGINEERING JOURNAL, 1 January 2002 (2002-01-01), pages 25 - 30, XP055877991
See also references of EP 3985384A4
See also references of EP 3985384A4
Attorney, Agent or Firm:
KIWA INTERNATIONAL (JP)
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