Modeling And Characteristics Of Swash Plate Axial Piston Pump

The working environment of excavator is complex and harsh,and inertia and working power of all moving parts are large,so frequent completion of acceleration,rotation,jitter rod,brake deceleration and other actions will waste a lot of energy.This part of energy is usually consumed at the inlet and outlet of each component,which not only leads to the reduction of service life of components,but also causes problems such as heating and energy loss of the system.Therefore,it is necessary to study the energy consumption of hydraulic components and optimize their parameters to save energy and reduce emissions and improve the working performance of excavators.In modern mechanical hydraulic system,axial piston pump is widely used as power source and hydraulic pump is the "heart" of hydraulic system,which is the core power element providing flow and performing action in hydraulic system.Axial piston pump has the unique advantages of small size,large power transmission,high pressure and speed,convenient variable control,high efficiency and long service life.However,under high pressure operating condition,the periodic oil suction and discharge process of piston pump will produce pressure and flow changes,cavitation and other phenomena,which will cause flow and pressure pulsation,thus causing vibration,noise and accelerating damage of parts.Therefore,it is of great significance to study the axial piston pump and optimize its performance for the performance improvement and development of the whole hydraulic system.In conclusion,based on the platform of Adams,AMESim and MATLAB,this paper will model and study the working characteristics of swashplate axial piston pump:(1)Through the theoretical derivation and calculation of the degree of freedom,kinematics and force law of the plunger pump,the movement and force situation of the main parts of the plunger pump are analyzed to explore the main causes of the mechanical noise of the plunger pump and analyze the main parameters affecting its performance.(2)Using Pro/E to build accurate three-dimensional model of each part of swashplate axial piston pump and assemble it.The model of the plunger pump is transferred to the dynamic analysis software ADAMS of the mechanical system,and complex constraints and forces are added to carry out kinematic and dynamic simulation analysis.The displacement,velocity,acceleration and force curves of the main parts under different working conditions are obtained.Through theoretical derivation and simulation analysis,the main mechanism of noise generation is analyzed from the mechanical point of view.(3)This paper mainly studies the plunger pump from the mechanical point of view,so the key components simulation model of the plunger pump is established on AMESim platform by using a new three-dimensional digital analog modeling method.Through the AMESim hydraulic module model,the flow pulsation,pressure pulsation and flow pressure characteristics are analyzed from the hydraulic point of view.The main characteristics of this paper are that the mechanical model controls the hydraulic model and the mechanical point of view is analyzed.(4)Through the theoretical derivation and Simulation of the hydraulic integrated simulation model of the plunger pump established by Adams and AMESim(Adams controls AMESim),the main parameters that affect the working performance of the plunger pump are found;by changing the parameters of the plunger pump model,the mutual restriction relationship between the parameters is found;by using matlab to optimize the design of the model parameters,the rationality that affects the working performance of the plunger pump is proposed Parameters.So as to reduce pressure shock and flow pulsation,improve the stability of working performance,and make the working system of hydraulic excavator have better energy saving effect.