Title:
油振診断装置および油振診断方法
Document Type and Number:
Japanese Patent JP6848874
Kind Code:
B2
Abstract:
First, the pressure of oil within an oil passage in a control valve device is measured. Then, an amplitude and period of pressure fluctuations are detected on the basis of an obtained measurement result, and an oil vibration state or an oil non-vibration state is diagnosed. In this case, when the amplitude is greater than a reference amplitude value and when the period is less than a reference period value, the oil vibration state is diagnosed. Further, a duration time of the oil vibration state is determined on the basis of a diagnostic result. Then, when the oil vibration state continues for a period greater than or equal to a reference time, warning information is output. In this way, warning information is output stepwise in accordance with occurrence or continuation of oil vibration.
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Inventors:
Yoshihisa Sugimoto
Sumiyoshi Shuyo
Toshimitsu Miyao
Sumiyoshi Shuyo
Toshimitsu Miyao
Application Number:
JP2017545475A
Publication Date:
March 24, 2021
Filing Date:
October 14, 2016
Export Citation:
Assignee:
Nidec Tosok Corporation
International Classes:
F15B20/00
Domestic Patent References:
| JP3260404A | ||||
| JP49030901A | ||||
| JP2168004A | ||||
| JP2016056836A |
Attorney, Agent or Firm:
Nidec Corporation