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DEM simulation model to optimise shutter hole position of a centrifugal fertiliser distributor for precise application
Biosystems Engineering ( IF 5.1 ) Pub Date : 2021-02-26 , DOI: 10.1016/j.biosystemseng.2021.02.004
Seok-Joon Hwang , Ju-Seok Nam

The purpose of this study is to analyse the distribution pattern of centrifugal fertiliser distributor with two shutter holes and obtain the optimal position of the shutter holes for improved distribution uniformity. A simulation model of the centrifugal fertiliser distributor was generated by discrete element method (DEM). The behaviour of fertiliser particles on the spinner was analysed by the simulation and the simulation model was verified through a stationary distribution pattern test. The distributor design was modified using the verified simulation model to improve the distribution uniformity. The simulation results of the existing fertiliser distributor showed the amount of fertiliser applied on the right side of the machine was 1.59 times higher than the amount applied on the left (R/L ratio) and the coefficient of variation (CV) was 34.88% at stationary condition indicated non-uniform fertiliser distribution. As the position of the shutter holes was moved in the direction of rotation of the spinner (i.e. clockwise) the amount of fertiliser distributed towards the right side decreased. The shutter hole position accordingly adjusted to improve fertiliser distribution uniformity. When the optimal position of the shutter hole was used under stationary condition, the R/L ratio was close to 1.0, whilst the CV value decreased by approximately 50%. The optimal solution was also suitable during continuous application when applying at a width of 8 m since CV values were <20%. Thus the optimal position can be used to improve the distribution uniformity when stationary and moving.



中文翻译:

DEM仿真模型可优化离心式肥料分配器的百叶孔位置,以实现精确的应用

这项研究的目的是分析带有两个活门孔的离心肥料分配器的分布方式,并获得活门孔的最佳位置,以提高分配的均匀性。利用离散元法(DEM)建立了离心式肥料分配器的仿真模型。通过仿真分析了肥料颗粒在旋转器上的行为,并通过平稳分布模式测试验证了该仿真模型。使用经验证的仿真模型修改了分配器设计,以提高分配均匀性。现有肥料分配器的模拟结果显示,机器右侧施肥量比左侧施肥量(R / L比)高1.59倍,变异系数(CV)为34。固定条件下88%表示肥料分布不均匀。当百叶窗孔的位置沿旋转器的旋转方向(即顺时针)移动时,向右侧分配的肥料量减少了。相应地调节百叶窗孔的位置以改善肥料分配的均匀性。当在固定状态下使用百叶窗孔的最佳位置时,R / L比率接近1.0,而CV值下降了约50%。当CV值<20%时,以8 m的宽度进行涂布时,最佳解决方案也适用于连续涂布。因此,最佳位置可用于改善静止和移动时的分布均匀性。当百叶窗孔的位置沿旋转器的旋转方向(即顺时针)移动时,向右侧分配的肥料量减少了。相应地调节百叶窗孔的位置以改善肥料分配的均匀性。当在固定状态下使用百叶窗孔的最佳位置时,R / L比率接近1.0,而CV值下降了约50%。当CV值<20%时,以8 m的宽度进行涂布时,最佳解决方案也适用于连续涂布。因此,最佳位置可用于改善静止和移动时的分布均匀性。当百叶窗孔的位置沿旋转器的旋转方向(即顺时针)移动时,向右侧分配的肥料量减少了。相应地调节百叶窗孔的位置,以提高肥料分配的均匀性。当在固定状态下使用百叶窗孔的最佳位置时,R / L比率接近1.0,而CV值下降了约50%。当CV值<20%时,以8 m的宽度进行涂布时,最佳解决方案也适用于连续涂布。因此,最佳位置可用于改善静止和移动时的分布均匀性。相应地调节百叶窗孔的位置,以提高肥料分配的均匀性。当在固定状态下使用百叶窗孔的最佳位置时,R / L比率接近1.0,而CV值下降了约50%。由于CV值<20%,因此最佳解决方案也适用于以8 m的宽度连续施用的情况。因此,最佳位置可用于改善静止和移动时的分布均匀性。相应地调节百叶窗孔的位置,以提高肥料分配的均匀性。当在固定状态下使用百叶窗孔的最佳位置时,R / L比率接近1.0,而CV值下降了约50%。由于CV值<20%,因此最佳解决方案也适用于以8 m的宽度连续施用的情况。因此,最佳位置可用于改善静止和移动时的分布均匀性。

更新日期:2021-02-26
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