Optimization And Analysis Of Damping Groove Structure Of Valve Plate Of Axial Piston Pump Based On Pumplinx

In construction machinery,hydraulic pump is one of the core components of construction machinery,its application range is very wide,the quality of hydraulic pump,directly affects the efficiency and service life of construction machinery.In the current hydraulic transmission system,piston pump is widely used because of many advantages,such as high transmission power density,high pressure,large flow,convenient variable control and so on.With the widespread use of piston pump,the noise of the piston pump research and efficiency improvement has become increasingly important.Therefore,this article mainly analyzes the motion law and flow characteristics of the traditional axial piston pump,and improves the flow distribution effect and reduces the flow ripple by changing the structure of damping groove of the valve plate.First of all,a single piston needs to be theoretically modeled,and then the theoretical model of the whole pump is established.By analyzing the change of flow area of the flow distribution plate of different damping groove structures,theoretical modeling is carried out for a variety of different damping groove structures,including triangular groove,U shaped groove,U-shaped groove and triangular groove combination structure.The simulation model of the flow characteristics of the whole pump is established by using the computer simulation software,and the influence of the damping groove structure of different distribution grooves on the performance of the piston pump is analyzed.Through the optimization analysis of the structural parameters of the damping groove of the distribution groove,the results showed that when the piston pump to choose the three damping groove structures,combining with groove structure performance is the best,the pressure pulsation rate was reduced by 1.46%,the flow ripple rate was reduced by 1.39%.The results of pumplinx verified that when the depth of the combined tank was 1.6mm,the width of the tank was 0.8mm,and the opening Angle of the triangular tank was 21.5 degrees,the pump infusion pressure amplitude decreased by 3.8 percent and the gas volume fraction amplitude decreased by 8.54 percent.The main content of this article is as follows:The first chapter points out the background and significance of this research.Based on the investigation and analysis of the axial piston pump at home and abroad,this paper introduces the characteristics and research status of the damper groove of the valve plate of the piston pump,and puts forward the main research content of this paper.The second chapter introduces the working principle of the axial piston pump and analyzed the reason for the formation of plunger pump noise,to determine the flow pulsation is a major cause of fluid noise,determine the structure of the valve plate design,and improvement of structure design flow with shock and corrosion,finally,the valve plate down and calculates the relevant mathematical model,by using matlab on different kinds of structure with an area of the simulation calculation of fluid flow table.Chapter 3 analyzes the structure of shock absorber of valve plate of different axial piston pump and creates its AMESim simulation module.Based on this AMESim module,the variation of flow ripple,swash plate torque and leakage of axial piston pump in different working conditions is analyzed.In chapter 4,three-dimensional model of axial piston pump with different valve plate structure is established.The flow passage was extracted and the model was established.The flow field simulation software pumplinx was used to simulate the pressure distribution,flow reversal and cavitation of the flow distribution plates with different structures.