| 摘要 |
PURPOSE:To aim at energy-saving by recovering the braking energy of a hydraulic motor to an accumulator, and recycling it as the driving energy of the hydraulic motor. CONSTITUTION:An accumulator 20 is connected to a hydraulic motor 9 through a sequence valve 14 having a lower set pressure than those of check valves 12, 13 and safety valves 15, 16. A discharge valve 21, which is interposed between the accumulator 20 and the discharge pipe 23 of a hydraulic pump 1, is opened when a directional switching valve 4 is switched from the neutral position to the appropriate position. Therefore, it is possible to recover the braking energy of the hydraulic motor 9 to the accumulator 20 and recycle it as the driving energy of the hydraulic motor 9, so as to aim at energy-saving. In addition, it is possible to securely prevent the generation of cavitation at the time of braking the hydraulic motor 9. |
