Title:
BEARING DEVICE STATE DETECTING METHOD, DETECTING DEVICE, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2023/176602
Kind Code:
A1
Abstract:
This method for detecting the state of a bearing device including a sliding bearing comprises applying an AC voltage to an electric circuit formed from the sliding bearing and a rotary shaft, measuring the impedance and phase angle of the electric circuit at the time of the AC voltage application, and deriving the oil film thickness and metal contact ratio between the sliding bearing and the rotary shaft on the basis of the impedance and the phase angle. The oil film thickness and the metal contact ratio are derived using a calculation expression corresponding to the electric circuit formed by line contact that occurs between the sliding bearing and the rotary shaft.
Inventors:
MARUYAMA TAISUKE (JP)
Application Number:
PCT/JP2023/008684
Publication Date:
September 21, 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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