Title:
BEARING DEVICE STATE DETECTION METHOD, DETECTION DEVICE, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2023/199655
Kind Code:
A1
Abstract:
The present invention provides a detection method for detecting the state of a bearing device including tapered roller bearings, the detection method comprising: applying an AC voltage to an electric circuit comprising an outer member, an inner member, and a plurality of rolling bodies while a certain load is applied to the bearing device; measuring the impedance and the phase angle of the electric circuit while the AC voltage is applied thereto; and using a calculation formula corresponding to the electric circuit to calculate, 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.
Inventors:
MARUYAMA TAISUKE (JP)
HORII YOJI (JP)
NIWA MISAKI (JP)
IWASE SHUNSUKE (JP)
HORII YOJI (JP)
NIWA MISAKI (JP)
IWASE SHUNSUKE (JP)
Application Number:
PCT/JP2023/008686
Publication Date:
October 19, 2023
Filing Date:
March 07, 2023
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
G01M13/04
Foreign References:
| JP2020193968A | 2020-12-03 | |||
| JP2020159754A | 2020-10-01 | |||
| JP2019211317A | 2019-12-12 |
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
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