Research On Compound Rotary Braking Energy Recovery System Of Hydraulic Excavator

Hydraulicexcavatoris widely used in various fieldssuch as transportation,water conservancy and many other projects. Powerful multi-functionadaptabilityand great potential for developmenthas decided the important position ofexcavatorin construction engineering. Butthe rotaryplatformof excavator has large inertia and large energy loss.Study on thetechnologyof saving energy and reducingtheemissionshas become an important part inpromotingthe development ofexcavator.The technology of energy-saving and emission-reductionusedinexcavator caneffectively reduce energyconsumption,improvethe stability and reliability of the system.Excavator energy lossdue to the engineworks,the system drives, as well as theexcavatorswing arm,revolving dial startsfrequently.In this paper,energy recovery system will be used to improve theenergy utilization efficiency of the system. Through analyze the recyclableenergy of eachactuatorofhydraulic excavator. The paper proposes a new strategyto recover the swing regenerative braking of the system, the new strategy recover energy by both super capacitor and hydraulic accumulator and store the energy recovered by accumulator in super capacitor. The specific contents are as follows:First of all, existing energy recovery strategyofhydraulic excavatorandrecyclableenergy proportion of rotarycircuit are analyzed, and rationalswing braking energy recoverysystem is designed.Analysis main factors affecting theenergy recoveryefficiencyof thesystem,and thehydrauliccomponents added in the systemwill be thepreliminary selectedand parametermatched.Secondly, the new system is simulated modeledandanalyzed byusing AMESimsoftware,the simulation models of accumulatorenergy recovery system,super capacitor energyrecovery systemand theconstruction of complexrotarybrake energy recovery system are established,analyzed and comprised.Thirdly,reasonable control strategy is used toidentifythe rotation braking system, and to controlthe working mode of motorgroup,reasonable control strategy will let the system morereliablen working condition,and finally, improve therecoveryefficiency of thesystem.The results show, the composite energy recovery strategy of the rotary brake system of the hydraulic excavator is feasible. It has achieved energy saving and emission reduction, and improved the starting and braking performance of the rotary platform.The strategy is conducive to improving the stability of the system and improve the life of the excavator.