| 摘要 |
<p>Hydraulic circuit (10) for a pumping unit (H) for concrete, having a plurality of actuators (20, 21, 22, 23). The hydraulic circuit (10) comprises pumping members (25) of the oil-dynamic type connected to the actuators (20, 21, 22, 23), distribution members (26, 27) that alternately drive the actuators (20, 21, 22, 23), and command members (29, 30, 35) that command the distribution members (26, 27) in order to coordinate the alternate actuation of the actuators (20, 21, 22, 23). The command members are of the oil-dynamic type and use the same fluid circulating in the pumping members (25) both for the pumping functions and also for the suction functions.</p> |
