| 摘要 |
PURPOSE:To save energy without a decrease in dredging efficiency, by a method wherein, during overload of a cutter and swing.winches, the number of revolutions of a motor is decreased, and during overload of both the cutter and the swing.winch, the number of revolutions of a pump is decreased. CONSTITUTION:A cutter 18 is given properties in which the number of revolutions is decreased without a decrease in torque of a motor 17 during overload, and swing.winches 21 and 24 are also given properties in that the number of revolutions is decreased without a decrease in torque of motors 20 and 23 during overload, and the swing speeds of the swing.winches 21 and 24 are controlled in linkage with the number of revolutions of the cutter 18. A pump 29 and an engine 32 of a ladder pump 30 and dredge pump 33, respectively, are controlled to the decreased number of revolutions when the cutter 18 and the swing.winches are both in an overload state. Further, control of a motor and an engine enables saving of energy without a decrease in dredging efficiency. |
