| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pumping installation capable of preventing performance diffrence in the working direction based on working tolerance. <P>SOLUTION: A swash plate 45 of a variable displacement pump 41 is operated with a double-acting inclined cylinder 46 in one direction and the other direction. There are separately installed a directional control valve 51 for controlling the direction of a working fluid output for the inclined cylinder 46, and a pressure control valve 53 for controlling the pressure of the working fluid input into the directional control valve 51. There are provided with a control signal feeding means 61 for feeding a common control signal for the directional control valve 51 and the pressure control valve 53, and a feedback means 69 for feeding back the feedback signal into the pressure control valve 53 identical to the working amount with one direction and the other direction operation of the inclined cylinder 46. <P>COPYRIGHT: (C)2004,JPO |
