农业机械学报2024，Vol.55Issue(z2)：30-40,11.DOI:10.6041/j.issn.1000-1298.2024.S2.004
果园四头倾斜螺旋式精准排肥器设计与试验
Design and Experiment of Four-head Inclined Spiral Precision Fertilizer Dischargers in Orchard
摘要
Abstract
To address the issues of significant fertilizer discharge fluctuations and poor stability in traditional spiral fertilizer dischargers,a four-head inclined spiral precision fertilizer discharger was designed.Through motion analysis and theoretical calculations,the key parameters affecting the stability of fertilizer discharge rate were identified,along with their optimal value ranges.Experimental factors included the number of spiral blades,discharger inclination angle,spiral blade diameter,spiral blade pitch,and spiral blade rotational speed,with the coefficient of variation of fertilizer discharge rate as the evaluation metric.Discrete element method(DEM)simulations were conducted for both single-factor and multi-factor scenarios.The single-factor simulation results indicated that the number of spiral blades,discharger inclination angle,spiral blade diameter,and spiral blade rotational speed all significantly impacted the stability of fertilizer discharge rate.It was found that using a four-head inclined spiral to convey fertilizer can enhance discharge stability.Multi-factor simulation results showed that the optimal parameter combination for a four-head spiral configuration was with discharger inclination angle of 38°,spiral blade diameter of 46 mm,and spiral blade rotational speed of 31 r/min.Under this combination,the coefficient of variation of fertilizer discharge rate reached minimum value of 1.65％.Finally,bench tests were conducted to validate the simulation results under the optimal parameter combination.The tests revealed that the measured coefficient of variation for fertilizer discharge rate was 3.69％.Further optimization determined that at spiral blade rotational speed of 33 r/min,the coefficient of variation could be minimized to 2.92％.Both simulation and bench test results demonstrated that the improved four-head inclined spiral precision fertilizer discharger performed well in terms of fertilizer discharge stability,which can meet orchard fertilization standards,and satisfy the operational requirements for orchard fertilization.关键词
农业机械/四头倾斜螺旋式精准排肥器/离散元仿真/参数优化/台架试验Key words
agricultural machinery/four-head inclined spiral precision fertilizer discharger/discrete element method simulation/parameter optimization/bench test分类
农业科技引用本文复制引用
徐文智,袁全春,曾锦,吕晓兰..果园四头倾斜螺旋式精准排肥器设计与试验[J].农业机械学报,2024,55(z2):30-40,11.基金项目
国家重点研发计划项目(2022YFD2001400)、国家梨产业技术体系项目(CARS-28)和江苏省农业科技自主创新资金项目(CX(22)2025) （2022YFD2001400）
