| 摘要 |
PROBLEM TO BE SOLVED: To enhance recovery efficiency of energy of working fluid delivered from a hydraulic actuator.SOLUTION: A driving system 1 of a hydraulic working machine includes hydraulic actuator control circuits 3 and 4 for controlling operation of hydraulic actuators 31 and 41, pumps 14 and 15 for delivering working fluid stored in a tank 21, an engine 11 for driving the pumps, supply lines 30 and 40 for supplying the working fluid to the hydraulic actuator control circuits from the pumps, a pump motor 18, a motor generator 22 connected to an output shaft of the pump motor, a motor generator controller 72 for controlling operation of the motor generator, a capacitor 26 for storing electric energy generated by the motor generator controller, regeneration lines 81 and 82 for supplying the working fluid delivered from the hydraulic actuator control circuits to the pump motor, and an accumulator 51 for collecting the working fluid flowing into the pump motor from the regeneration lines and delivered from the pump motor.SELECTED DRAWING: Figure 1 |
