| 摘要 |
<p>A control circuit of a transportable crusher, which improves simultaneous operability, fine adjustment and reproducibility when the same pump is used to supply fluid to hydraulic motors and actuators to drive machines having different loads. The control circuit includes at least one variable-delivery hydraulic pump (1); transfer valves (12, 13, 14, 15, 16, 17, 18, 19, 20, 21) for conducting and interrupting the working fluid supplied from the hydraulic pump to hydraulic motors and actuators (25a, 26a, 27a, 28a, 29a, 30a, 31a, 32a, 33a, 34a); pressure compensation control valves (11) for inputting front and back pressure of switch valves, controlling the discharge flow rate of the hydraulic pump (1) so that the difference of these front and back pressures becomes constant, and distributing the discharge flow rate in accordance with required power of the individual hydraulic motors and actuators, or in a predetermined sequence when the switch valves are simultaneously operated; and control means (41) for controlling switch valves to predetermined values set in accordance with the load of the corresponding hydraulic motors and actuators.</p> |
