Research On Optimization Of Structure And Performance Of Electromagnetic Force Interactive Plunger Pump

Piston pumps,as power components of hydraulic systems,are widely used in agricultural machinery,construction machinery and other fields.Traditional plunger pumps are driven by rotating power machinery such as internal combustion engines or motors,and other forms of energy are converted into hydraulic energy.In recent years,the more popular electromagnetic pump has higher frequency,shorter stroke and smaller flow.On this basis,the electromagnetic force interaction plunger pump is put forward,and its working principle and structure are discussed in detail.On the basis of developing the first generation principle verification prototype,buffer optimization research and structure optimization research are carried out.In this paper,the structure and working principle of electromagnetic force interaction plunger pump are discussed in detail.The structure and model of electromagnetic force interaction plunger pump are designed preliminarily by using empirical design method of electromagnet,and the parameters are determined.The three-dimensional model of electromagnetic force interaction plunger pump is established on Solidworks threedimensional design platform.Combining with the working process of the electromagnetic pump,the electromagnetic pump is abstracted into three coupling physical links: circuit links,magnetic links and mechanical and hydraulic links,and its mathematical model is established.Each link and coupling situation are analyzed in detail.Based on Maxwell's equations,the mathematical model of electromagnet is established,and the working principle and performance parameters of electromagnet are analyzed.Based on ADAMS virtual prototype simulation platform,the virtual prototype of electromagnetic force interaction plunger pump is established.Through virtual prototype simulation,the motion characteristics of electromagnetic force interaction plunger pump are obtained,including the plunger motion cycle of 0.2s;the plunger motion speed curve with time,when the plunger reaches the top dead point,the maximum speed is about 0.45m/s;the plunger acceleration curve and the plunger in the top dead point are about 0.45m/s.The maximum impact force at the end of the journey is 3500 N.The force analysis and dynamic model of the electromagnetic force interaction plunger pump are established,and the plunger cushioning is realized by optimizing the control strategy of the electromagnetic coil.After optimization,the electrification time of the electromagnetic coil is 0.07 s,and the maximum velocity of the plunger is 0.42 m/s.Then the plunger reaches the top dead point relying on inertia.When the top dead point is reached,the plunger velocity is 0,so that the end of the plunger stroke is free of impact.Taking the electromagnet as the research object,the finite element simulation model of the electromagnet is established based on COMSOL low frequency electromagnetic module,which is a multi-physical field coupling analysis platform,and the electromagnetic force characteristic curve of the armature's axial displacement is obtained.According to the electromagnetic force characteristic curve,the optimization model is established with the coil's axial position as the design variable,and the optimal coil's axis is obtained through optimization.Location.After optimization,the energy conversion efficiency of the electromagnetic interaction plunger pump is increased by 43%,and the starting electromagnetic suction is increased by nearly four times.The armature structure of the electromagnet is redesigned,and the structure optimization model of the armature component of the electromagnet is established based on ISIGHT multi-disciplinary optimization platform.After optimization,the volume of armature decreases by 48.27% and 76.63% compared with that before redesign.