Study on Fertilizer Discharge Performance of External Groove Wheel Fertilizer Applicator Based on Discrete Element Method
In order to improve the fertilization discharge performance of variable fertilization of seeder,the fertilizer discharge performance of external groove wheel fertilizer applicator was studied based on discrete element method.Firstly,the discrete element material simulation parameters were determined through fertilizer calibration test.Then,based on the optimization module design experiment of Isight software,with the working length and rotational speed of the outer groove wheel as factors and the coefficient of variation of fertilizer uniformity as the response design experiment,the second-order regression equation of the coefficient of variation of fertilizer uniformity of the fertilizer discharger was obtained.Based on the obtained regression equation,the influence of the working length and rotational speed combination of the outer groove wheel on fertilization stability within a specific fertilizer amount range was analyzed.For fertilizer application rate of 300 kg·hm-2,the external groove wheel flow equation was used as a constraint to optimize the solution.The optimal combination of fertilizer discharge parameters for the external groove wheel fertilizer applicator was groove wheel working length of 60 mm and rotation speed of 30 r·min-1.The optimal fertilization parameter combination was used for fertilization simulation experiments,and the coefficient of variation of fertilization uniformity was 11.7%,which met the fertilization requirements.Above results provided a reference for parameter allocation in the operation of the 2BMJ series no-tillage precision seeder.
seederexternal groove wheel fertilizer applicatordiscrete elementoptimal designcoefficient of variation for uniformity
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