| Electric spray gun has been widely used in manufacturing,housing decoration,furniture manufacturing for its advantage of small,light,good spraying effect and higher spraying efficiency,etc.In the process of spraying,the flow field distribution and the atomization effect,etc are the important influencing factors of the coating.So it is important reference for the spray gun design to study the spray characteristics of spray gun.Aimed at the problem of poor spraying quality of Electric spray gun,this paper used CFD to simulate the flow field characteristics and verified the simulation result by PIV.On the basis,found out the influence factors of spraying effect and put forward the improvement scheme to improve the spraying effect.The main work and achievements are presented as follows:(1)On the basis of introducing spraying principle of spray gun,analyzed the flow and atomization situation of spray gun flow field,presented the velocity distribution of the flow field.(2)Established a mathematical model of inside and outside flow field of spray gun,on the basis of guaranteeing the numerical transmission accuracy between inside and outside field,made a numerical simulation,extracted the speed and particle size distribution.(3)Using the particle image velocimetry(PIV)to test the flow field of spray gun and extracted the velocity distribution,using drip pan method to test and get particle size distribution,compared the test speed and particle size distribution with theoretical simulation results.(4)On the basis of theoretical analysis and experimental test,found out the structure factors influencing the flow field distribution,and did structure improving design of the spray gun.Finally,analyzed and verified the improved results using the method of numerical simulation and experimental.In this paper,analyzed the spray characteristics of spray gun by using numerical simulation and experimental testing method,and proposed the improvement scheme.This Provides reference for related design of spray gun. |
PDF Full Text Request