薛忠,赵亮,王凤花,王槊,王刚,潘睿.基于离散元法的螺旋式排肥器性能模拟试验[J].湖南农业大学学报:自然科学版,2019,45(5):.
基于离散元法的螺旋式排肥器性能模拟试验
  
DOI:
中文关键词:  螺旋式排肥器  离散元法  颗粒肥料  参数优化  EDEM
英文关键词:spiral fertilizer distributor  discrete element method  fertilizer particles  parameter optimization  EDEM
基金项目:科技部国家重点研发项目(2017YFD0202102);广东省科学技术厅重点领域研发计划项目(2019B020223001);中央级科研院所基本业务费农机装备科技创新团队项目(1630132017004)
作者单位
薛忠,赵亮,王凤花,王槊,王刚,潘睿 1.中国热带农业科学院农业机械研究所广东 湛江 5240912.昆明理工大学现代农业工程学院云南 昆明 650500 
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中文摘要:
      为提高螺旋式排肥器对颗粒肥料的排肥稳定性与均匀性,采用离散元仿真软件EDEM对排肥器结构参数进行数值模拟并进行仿真试验,分析螺旋叶片直径、螺距和排肥轴转速对排肥器排肥性能的影响,获得排肥器工作参数与排肥量和排肥稳定性变异系数的回归数学模型。仿真试验结果表明:影响螺旋式排肥器排肥量的因素主次依次为排肥轴转速、螺距、螺旋叶片直径,排肥量最大为221.2 g/s,最小为54.76 g/s;影响排肥稳定性变异系数的因素主次依次为排肥轴转速、螺距、螺旋叶片直径,通过Design–Expert 8.0进行参数优化,确定排肥器最优参数组合,即螺旋叶片直径100 mm、螺距60 mm、排肥轴转速15 r/min,此时排肥稳定性变异系数达到最小值,为8.48%,排肥器排肥性能较为稳定均匀。
英文摘要:
      In order to improve stability and uniformity of the fertilizer discharge in tropical orchards, the discrete element method based on EDEM was used to simulate the structural parameters of the fertilizer and carry out simulation experiments. The effects of screw blade diameter, pitch and the speed of exhaust shaft on the fertilizer discharge performance were analyzed to establish the regression mathematical model of the working parameters and the variation coefficient of the fertilizer discharge. The simulation results show that the factors affecting the fertilizer discharge rate of the spiral fertilizer are the rotation speed of the fertilizer discharge shaft, the pitch, and the diameter of the spiral blade in sequence. The maximum and minimum fertilizer discharge rate is 221.2 g/s and 54.76 g/s, respectively. The factors affecting the variation coefficient of fertilizer discharge stability is the speed of shaft, the pitch, and the diameter of screw blade. The optimal parameter combination is determined by Design-Expert 8.0 with the crew blade diameter of 100 mm, the pitch of 60 mm, and the rotation speed of 15 r/min. Under the optimal parameter, the variation coefficient of the fertilizer discharge stability reaches the minimum value of 8.48%. The fertilizer discharge performance of the fertilizer discharge is stable and uniform.
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