有机肥施肥机关键部件的有限元分析及试验

Finite element analysis and test of key parts of organic fertilizer applicator

为验证自主研发的有机肥施肥机关键工作部件设计的可靠性,首先利用Solidworks自带插件Simulation对受力较大的下螺旋破碎辊和撒施圆盘进行有限元分析。静应力分析结果显示只需对轴头材料进行更换,其他所选材料的屈服极限大于所受最大应力,所用材料合适,安全系数高。模态分析结果表明由下螺旋破碎辊转动、圆盘转动产生的激振及拖拉机激振频率与自身频率无重叠,发生共振的可能性低。然后进行技术指标检测试验,施肥机施肥幅宽4.5 m,横向均匀度变异系数和纵向均匀度变异系数分别为21.3%、13.8%,施肥量变异系数为3.6%,作业效率3.6 hm^2/h。

In order to verify the design reliability of the key working parts of the organic fertilizer fertilizing machine,firstly,the finite element analysis of the lower spiral crushing roller under great stress and the scatter disk were carried out by using the built-in plug-in Simulation of Solidworks.The results of static stress analysis show that the yield limit of other selected materials is greater than the maximum stress,and the materials used are suitable with high safety factor.The modal analysis results show that the vibration caused by the rotation of the lower screw crushing roller,the rotation of the disk and the vibration frequency of the tractor do not overlap with its own frequency,and the resonance possibility is low.Then,the technical indicators were tested.The fertilization width of the fertilizer applicator was 4.5 m,the variation coefficients of horizontal/vertical uniformity were 21.3%and 13.8%,the variation coefficient of fertilizer application was 3.6%,and the operation efficiency was 3.6 hm^2/h.