| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure adjusting device for optimizing operation efficiency of an operation pump by enhancing control responsiveness while accurately adjusting a pressure of working fluid at multiple levels.SOLUTION: A pressure adjusting device includes: a housing 1 having an inner flow passage 18 through which working fluid delivered from an operation pump 6 flows; a valve element 2 which can be reciprocated in an inside of the housing 1 so as to receive a pressure of the working fluid flowing through the inner flow passage 18; an energizing force adjusting mechanism D having a spring 3 for energizing the valve element 2 to a direction against the pressure, a supporting part 4 holding an end of the spring 3 on a side opposite from the valve element 2, and a motor M adjusting a rotation angle and reciprocating the supporting part 4; a pressure sensor P for measuring the pressure of the working fluid; and a control part 9 for adjusting driving force of the motor M. The control part 9 determines a movement distance of the supporting part 4 and response time of the motor M based on a target pressure and the measurement pressure measured by the pressure sensor P.SELECTED DRAWING: Figure 1 |
