Design And Energy Efficiency Analysis Of Slewing System On Hydraulic Excavator

Hydraulic excavator is an important engineering mechanical equipment,which can improve the efficiency of engineering,and is widely used in hydraulic engineering,transportation,electrical engineering,mining and other mechanical construction.In the actual work,because of the bad working environment and the complex working mode of hydraulic excavator,the working device of excavator has been in the condition of frequent fluctuation for a long time,resulting in the diesel engine in the working area of high consumption and low efficiency for a long time,which makes the utilization efficiency of fuel low.With the shortage of energy,energy saving,high efficiency and low emission have gradually become the pursuit of engineering machinery research and development One of the main goals.The majority of researchers through the field experiment and research analysis of the common rotating condition of the traditional excavator,have come to the conclusion that there are two main aspects of energy loss in the rotating condition: one is the overflow loss in the starting stage of the excavator rotating;the other is the loss of energy generated by the inertia motion of oil in the braking process.In view of the low efficiency of energy utilization in the rotating condition of excavator,scholars at home and abroad have summarized many practical research methods,such as independent control technology of import and export,secondary regulation technology,load sensitive technology,energy recovery and reuse technology,etc.Based on the analysis of the characteristics of load sensitive technology and energy recovery technology of accumulator,this paper puts forward three energy-saving schemes based on the slewing system of excavator,compares the energy-saving characteristics of the three schemes,puts forward the improvement scheme and studies the system parameters affecting the energy-saving characteristics in the next step,in order to get a better design scheme of energy-saving effect of excavator slewing condition.The main research contents are as follows:First of all,this paper discusses the important significance of energy saving research on the rotating condition of excavator to improve the energy savingefficiency of the whole machine,summarizes the current energy saving research on the rotating system of excavator at home and abroad,summarizes the advantages and disadvantages of each method,puts forward three energy saving schemes based on the load sensitive technology and energy recovery technology of accumulator,and summarizes this paper The main content of this paper.Secondly,this paper analyzes the rotary hydraulic system of the traditional excavator,and carries on the type selection and Simulation of the excavator.Starting from the mathematical model and simulation,it analyzes the feasibility of energy saving of the rotary system of the excavator,puts forward three energy saving schemes based on the rotary system of the excavator,establishes the working principle diagram and system control strategy of each scheme,and analyzes the energy efficiency of the rotary hydraulic system of the excavator The research object was set up.It provides a certain reference value and basis for the energy saving of mining machinery.Thirdly,the parameters of the key components of the rotary energy-saving system are matched.The AMESim model of the load sensitive rotary system,the traditional energy recovery and reuse system and the load sensitive energy recovery and reuse system are established and the energy efficiency analysis is carried out,Through the calculation of simulation data,we can get all kinds of set work value and energy utilization efficiency.The results show that the hydraulic pump of the load sensitive rotary system can reduce the energy loss by 23.8%,and the energy recovery and reuse system of the general accumulator is obtained The recovery efficiency of brake energy is 60%,the recovery efficiency is 71.1%,the system energy saving efficiency is 54.5%,and the energy recovery efficiency of load sensitive accumulator is 59.7%.Finally,taking the scheme of energy recovery and reuse of load sensitive accumulator as the research object,by changing single system parameters such as accumulator set pressure and accumulator volume,the influence of system parameters on the characteristics of rotary energy saving is studied.