Title:
ROLLING DEVICE DIAGNOSING METHOD, DIAGNOSING DEVICE, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2024/071272
Kind Code:
A1
Abstract:
This method for diagnosing a rolling device in which rolling elements and peripheral members are lubricated using a lubricant includes: applying an alternating-current voltage to an electric circuit comprising the rolling elements and the peripheral members; measuring an impedance and a phase angle of the electric circuit when the alternating-current voltage is applied; deriving an evaluation value representing a lubrication state inside the rolling device, using a calculation formula defined by the measured impedance and phase angle, an angular frequency of the alternating-current voltage, the number of rolling elements in the rolling device, and the number of contact points; and using the evaluation value to diagnose the lubrication state of the rolling device.
Inventors:
TAKEDOMI JURI (JP)
Application Number:
PCT/JP2023/035318
Publication Date:
April 04, 2024
Filing Date:
September 27, 2023
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
G01M13/04
Foreign References:
| JP2020193968A | 2020-12-03 | |||
| JP6380720B1 | 2018-08-29 | |||
| JP2009002693A | 2009-01-08 | |||
| JPS63290936A | 1988-11-28 | |||
| JP2012163101A | 2012-08-30 |
Other References:
TAISUKE MARUYAMA: "Lubrication Condition Monitoring of Practical Ball Bearings by Electrical Impedance Method", TRIBOLOGY ONLINE, vol. 14, no. 5, 15 December 2019 (2019-12-15), pages 327 - 338, XP093153095, ISSN: 1881-2198, DOI: 10.2474/trol.14.327
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
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