| 摘要 |
A power regeneration device for an operating machine comprises a hydraulic line 31 which is connected to a bottom-side hydraulic chamber of a hydraulic cylinder 3a and through which returning fluid returning to a tank 6A flows when the hydraulic cylinder 3a contracts, a branching part 32 which is provided in the hydraulic line 31 to branch the hydraulic line 31 into a plurality of hydraulic lines, a regeneration line 33 which is connected to the branching part 32 and leads the returning fluid to the tank 6A via a hydraulic motor 11 to which a generator 12 is connected, a control valve line 34 which is connected to the branching part 32 and leads the returning fluid to the tank 6A via a control valve 2, operation amount detection means 16 which detects the operation amount of an operating device 4, an electricity storage device 15 which stores electric power generated by the generator 12, electric amount detection means 17 which detects the electric amount of the electricity storage device 15, and flow rate calculation means 9 which calculates the flow rate of the returning fluid flowing through the regeneration line 33 and the flow rate of the returning fluid flowing through the control valve line 34 depending on an electric amount signal from the electric amount detection means 17. |
