| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce energy loss while ensuring priority of revolution.SOLUTION: Parallel connections between a control valve for revolution 20 and control valves 21, 22 more downstream than the control valve for revolution, as well as throttle for priority of the revolutions, are abolished. While oil in a first pump 11 is supplied to a revolving motor 15 at the time of combined control of the revolving motor 15 and hydraulic actuators 16, 17 more downstream than the revolving motor, oil in a second pump 12 is supplied to the downstream actuators 16, 17 via a confluence valve 28 and a confluence line 27.</p> |
