Research On Energy-saving Simulation Of Rotary Device Of Hydraulic Excavator Based On Energy Recovery

The energy saving efficiency of the excavator can be greatly improved by the rotary hydraulic system which uses the secondary regulation technology to recover the energy of the accumulator.Hydraulic excavator as a widely used construction machinery,it has the characteristics of reducing the working intensity and improving the working efficiency of the workers.Excavator is an important equipment for earthwork excavation,which is widely used in water conservancy and hydropower,military engineering,mountain excavation,engineering construction and so on.The traditional rotary device of hydraulic excavator has great energy loss in the working process,the reason is that the whole rotary platform has more start-up and braking in the course of working.There is also a large moment of inertia in the process,which is the cause of energy loss.The energy accumulator in the secondary regulation system can be used for recycling the energy,and the energy-saving efficiency of the excavator can be greatly improved.Energy saving of excavators is of great significance to provide energy consumption and protect the environment.In this paper,the principle and working condition analysis of the rotary system of hydraulic excavator are introduced.In this paper,the model of AMESim of the traditional hydraulic excavator is established,and the reason of energy consumption and the energy value of the theoretical recovery are analyzed from the model.Then,according to this energy loss,the lost energy is recovered and reused by adding a storage device.The energy is recovered by the accumulator during the rotary braking process,and the energy released by the accumulator in the reverse phase provides the energy,and the simulation test is carried out by the AMESim software.The experimental results show that the accumulator energy recovery system achieves a certain amount of energy recovery,the energy saving effect is more remarkable,and the energy loss is also reduced.Among them,the energy recovery rate is 40.8%,the accumulator energy recovery efficiency is33.63%,and the energy saving efficiency of the system is 13.73%.In that second place,by introducing the principle and control mode of secondary regulation,a hydraulic rotary system based on secondary regulation is designed.The constant pressure network is established by constant pressure pump and accumulator,and the AMESim model of rotary system based on secondary regulation is established by adding PID control mode.Through model analysis,the energy saving effect of hydraulic pump power output and accumulator is remarkable,in whichthe energy recovery rate is 68%,the energy recovery efficiency is 39.9%,and the energy saving efficiency is 27.1%.Finally,by studying the influence of single parameter on the rotary system based on secondary adjustment,the energy recovery rate,energy recovery efficiency and energy saving efficiency of accumulator can be increased by increasing the moment of inertia.The energy recovery rate,the energy recovery efficiency of the energy accumulator and the energy-saving efficiency can also be increased by suitable means of increasing the system pressure.