韭菜培土机设计与试验

Design and Experiment of Leek Planting Machine

根据农艺需求,韭菜进入动态生长期后要进行2~3次培土工作,且随着韭菜假茎不断长高,培土高度也不断增加。为此,针对国内外现有中耕培土机培土易损伤韭菜茎叶、扶苗困难、不适合韭菜多次培土的问题,设计了一种韭菜培土机,经过对扶苗装置、培土刀的理论研究,确定了工作参数,并采用离散元法模拟了韭菜培土过程,分析了培土装置作业参数对土壤颗粒各轴向运动速度和垄上颗粒数量的影响。通过数据处理软件对田间试验结果进行分析,得到了最优组合参数,即刀具转速为370r/min、内挡土板展开角为93°、外挡土板展开角为68°、培土宽度为365mm、培土厚度为94mm、韭菜真叶土壤覆盖量为72g。

According to the needs of agriculture,leek into the dynamic growth period to carry out 2-3 times of soil cultivation work,leek false stem growing high,soil cultivation height is also increasing,aiming at the existing domestic and foreign soil cultivation machine is easy to damage the stems and leaves of leek,supporting the seedling is difficult,is not suitable for the leek multiple soil cultivation problem,designed a leek soil cultivation machine,after the supporting seedling device,the theoretical research of the soil cultivation knife,The working parameters were determined,the discrete element method was used to simulate the soil raising process of leek,and the effects of the operating parameters of the soil raising device on the axial velocity of soil particles and the number of particles on the ridge were analyzed.Data processing software was used to analyze the field test results,and the optimal combination parameters were obtained,that is,the tool speed was 370r/min,the inner retaining plate expansion Angle was 93°,the outer retaining plate expansion Angle was 68°,the soil width was 365mm,the soil thickness was 94mm,and the soil cover amount of leek true leaf was 72g.