This invention relates to the field of energy-saving technology for construction machinery, and discloses an
energy recovery and reuse device for a hydraulic
system of construction machinery. The device includes: an
energy recovery interface for connecting to the regeneration oil port of the main hydraulic
system to form a regeneration circuit; a composite
energy storage module for receiving hydraulic energy of different pressure levels from the regeneration circuit and storing and releasing the energy in an optimal manner; an intelligent electro-
hydraulic control valve group for controlling the on / off state, flow direction, and flow rate of the
recovery and release oil circuits; and an intelligent
energy management controller for predicting changes in the overall
machine load in real time, dynamically coordinating
energy recovery, storage, and release to achieve optimal overall energy efficiency of the hydraulic
system. This invention upgrades the
recovery of energy from in-situ utilization to
global scheduling through multi-source energy
recovery and prediction-based intelligent dynamic allocation, enabling precise release at the moment when auxiliary power is most needed, maximizing energy utilization; and significantly reducing fuel consumption.