ENERGY REGENERATION SYSTEM FOR WORKING MACHINERY

摘要

PROBLEM TO BE SOLVED: To provide an energy regeneration system for working machinery.

SOLUTION: A method and an apparatus improve regeneration efficiency when regenerating the energy of a discharge fluid from a fluid pressure actuator as electric energy. A displacement variable regenerating hydraulic motor is provided in a flow rate control line functioning as a discharge flow passage for oil discharged from a head side oil chamber of a hydraulic cylinder, and a flow rate of the discharge oil from the head side oil chamber of the hydraulic cylinder can be controlled by controlling the displacement of a regenerating hydraulic motor. A generator is further provided for generating electric power by the rotation of the regenerating hydraulic motor.

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