Title:
DETECTION METHOD OF STATE OF BEARING DEVICE, DETECTION DEVICE, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2022/054352
Kind Code:
A1
Abstract:
A detection method of the state of a bearing device comprising an outer member, an inner member, and a plurality of rolling bodies, wherein while the bearing device is being applied a given load, an AC voltage is applied on an electric circuit formed by the outer member, the inner member, and the plurality of rolling bodies, then the impedance and the phase angle in the electric circuit under the applied AC voltage are measured, and on the basis of the impedance and the phase angle, an oil film thickness and a metal contact ratio between the inner member and the plurality of rolling bodies or between the inner member and at least one of the plurality of rolling bodies are calculated.
Inventors:
MARUYAMA TAISUKE (JP)
SUGAWARA SUGURU (JP)
MAEDA MASAYUKI (JP)
SUGAWARA SUGURU (JP)
MAEDA MASAYUKI (JP)
Application Number:
PCT/JP2021/020755
Publication Date:
March 17, 2022
Filing Date:
May 31, 2021
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16C19/52; F16C41/00; G01M13/04
Foreign References:
| JP2018180004A | 2018-11-15 | |||
| JP2019211317A | 2019-12-12 | |||
| JP2008185339A | 2008-08-14 | |||
| JP4942496B2 | 2012-05-30 | |||
| JP2020153845A | 2020-09-24 |
Other References:
See also references of EP 4212749A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
Download PDF:
Previous Patent: AGRICULTURE SUPPORT SYSTEM
Next Patent: VEHICLE SUPPORT STRUCTURE AND METHOD FOR MANUFACTURING VEHICLE SUPPORT STRUCTURE
Next Patent: VEHICLE SUPPORT STRUCTURE AND METHOD FOR MANUFACTURING VEHICLE SUPPORT STRUCTURE