Flywheel-Based Boom Energy Recovery System for Hydraulic Excavators with Load Sensing System

A hydraulic excavator (HE) is a typical piece of construction equipment and widely used in various fields. However, the poor energy efficiency HEs results serious waste has aroused attention researchers. Furthermore, rising fuel prices increasing stringent gas emission legislation sparked demand for ways to improve efficiency. Recovering otherwise wasted boom potential conventional HE by proper methods offers HEs. In this paper, mechanical recovery system consisting pump/motor flywheel presented using load sensing system. When moves down, converted into cylinder accelerate flywheel. needed, captured stored back form pressure directly drive up without throttling main valve. lifting process, compound circuit that consists control displacement presented. strategy proposed optimize reuse procedure. 4-t as study case investigate energy-saving Numeric simulations show system, when compared with can reduce much 48.9% consumption non-loaded cycle lowering process. As fully loaded case, rate 16.9%. This research indicates flywheel-based scheme promising developing an energy-efficient fluid power reducing consumptions.