Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR DIAGNOSING ROLLING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/128062
Kind Code:
A1
Abstract:
The present invention is a method for diagnosing a rolling device provided with an outer member, an inner member, and rolling elements, wherein: an alternating voltage is applied to an electric circuit configured by the outer member, the rolling elements, and the inner member; an impedance and a phase angle of the electric circuit when the alternating voltage is applied is measured; and a lubrication film thickness and a metal contact ratio are calculated between the outer member and the rolling elements and/or the inner member and the rolling elements, on the basis of the measured impedance and phase angle.

Inventors:
MAEDA MASAYUKI (JP)
MARUYAMA TAISUKE (JP)
NAKANO KEN (JP)
Application Number:
PCT/JP2017/044745
Publication Date:
July 12, 2018
Filing Date:
December 13, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NSK LTD (JP)
International Classes:
G01M13/04; G01N27/04
Foreign References:
JPS63290936A1988-11-28
JP2002131187A2002-05-09
JPH0496617U1992-08-21
JP2012163101A2012-08-30
JP4942496B22012-05-30
JP2017001019A2017-01-05
Other References:
S. SCHNABEL ET AL.: "Monitoring of Running-in of an EHL Contact Using Contact Impedance", TRIBOLOGY LETTERS, vol. 63, no. 35, 29 July 2016 (2016-07-29), pages 1 - 10, XP036049013, DOI: 10.1007/s11249-016-0727-2
See also references of EP 3567358A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
Download PDF: