Research On Slewing Platform Braking Energy Saving Of Hydraulic Excavator Based On Secondary Regulation

Excavatorsare widely used but the energy wasted in construction machinery.It plays a huge role on many construction.Excavators great demand in the Chinese market, but the fuel utilization rate is low and fuel consumption is very high,for instance the ordinary excavator’s energy efficiency is about 20%. So the excavator rotary motion is necessary to study.Excavators work in each cycle,rotary action frequently. For the slewing system of the hydraulic exactor, the energy loss is mainly caused by the overflow loss when the slewing system starts and the kinetic energy of the slewing platform will loss in the form of the heat energy when the slewing system brakes.Theoverflow losses and heat energy will cause the temperature of the hydraulic system rises.It will decline the effective power system,and reduce the number of life of hydraulic oil.This paper analyzes the rotary motion of the excavator,and appliesthe secondary regulation technology and PID control technology to the rotation system. Aiming for the energy recovery when the slewing platform braking. This paper studies commence for excavator energy-saving slewing system.1.Through researching and reading relevantartickes, understanding the hydraulic excavators’ slewing system, find out the deficiency of the present study.On the bases of the secondary regulation technology superiority, topropose the secondary regulation technology apply to slewing hydraulic system.2.Analysis the energy-saving programs of slewing system,research on traditionalexcavator and the excavator slewing hydraulic system with an accumulator to recycle energy,and designethe hydraulic excavator slewinghydraulic system which basedonsecondaryregulation technology.3.To match the main elements parameters of secondary conditioning system,for accumulator overall modeling and parametric analysis.4.To build simulation Amesim models forthe traditional excavator slewing hydraulic system. The systembased on the thehydraulic accumulator of excavator slewing system and the excavator slewing hydraulic system based on PID control ofthe secondary regulation technology.Separately.By the simulation and analysis, as a result, the excavator slewinghydraulicsystembased on PIDcontrolofthe secondary regulation technology have an energy recovery efficiency of 68%,the system energy efficiency was 48%,and the speed of slewing platformhad a good stability.5.Thedifferent parametersofhydraulicsystem have an effectonthe excavator slewing hydraulic system which based on PID of the secondary regulation technology.