Title:
油圧ユニット
Document Type and Number:
Japanese Patent JP7376781
Kind Code:
B2
Abstract:
To provide a hydraulic unit capable of issuing a warning before abnormal stop.SOLUTION: A hydraulic unit (1) includes: a hydraulic oil tank 10 for storing hydraulic oil; a hydraulic pump (30) that sucks the hydraulic oil in the hydraulic oil tank (10) and discharges the hydraulic oil to a hydraulic actuator; a pressure detection part (91) that detects a discharge pressure of the hydraulic oil of the hydraulic pump (30); a rotation speed detection part (92) that detects a rotation speed of the hydraulic pump (30); a pressure holding control part (61) that control the hydraulic pump (30) on the basis of the discharge pressure detected by the pressure detection part (91) so that the discharge pressure of the hydraulic oil of the hydraulic pump (30) becomes constant; and a warning issuing part (63, 93) that issues a warning for prompting maintenance, if at least a fluctuation range of the discharge pressure detected by the pressure detection part (91) exceeds a predetermined fluctuation range and the rotation speed detected by the rotation speed detection part (92) exceeds a predetermined rotation speed, when control of the pressure holding control part (61) is performed.SELECTED DRAWING: Figure 4
Inventors:
Keijiro Yamazaki
Application Number:
JP2019212482A
Publication Date:
November 09, 2023
Filing Date:
November 25, 2019
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
F15B20/00; F15B1/26
Domestic Patent References:
| JP2013253674A | ||||
| JP2001038114A | ||||
| JP2005195081A | ||||
| JP2012041767A | ||||
| JP10089316A | ||||
| JP5071511A | ||||
| JP2008303985A | ||||
| JP2011085044A | ||||
| JP2012097822A |
Attorney, Agent or Firm:
Takuji Yamada
Etsuko Isoe
Toshiyuki Yamazaki
Etsuko Isoe
Toshiyuki Yamazaki