摘要
针对我国水稻品种类型多样化、生产条件差异大、机械作业行距固定、机插毯状苗生产潜力小等问题,在久保田SPV—6C型高速水稻插秧机基础上改进设计一种可调宽窄行高速水稻钵苗插秧机移箱机构,实现对钵苗的精准取苗和栽插,发挥钵苗和宽窄行种植的优势。按照农机农艺融合的原则,确定移箱机构螺旋轴的结构参数,并建立关键部件的三维模型,分析螺旋轴的结构模态以及对螺旋轴组件装配体进行仿真分析。结果表明:螺旋轴在最高转速时的激振频率为11.08Hz,远小于其第一阶固有频率236.428Hz,不会与插秧机发生共振;滑块圆弧中心点位移约为217mm、质心水平移动速度约为272.87mm/s,与理论结果基本一致;所设计的移箱机构达到了预期性能要求,为进一步实验验证提供较好的理论依据。
Rice is rich in varieties and different in its production conditions in China,the fixed transplanting spacing and limited production potential of rice carpet seedling are the problems.A moving-box mechanism with adjustable wide-narrow row high speed pot-seedling rice transplanter was designed based on SPV—6Ctype transplanter to pick and transplant pot-seedling accurately,thus the advantages of wide-narrow row planting and pot-seedling would be exerted.According to the principles of combining agricultural machinery and agronomy,parameters of screw shaft were determined.Three-dimensional model of moving-box mechanism was built,modal of the screw shaft was analyzed and simulation analysis of the screw shaft assembly was conducted.The results showed that excitation frequency of screw shaft is 11.08 Hz when reaches the highest speed and far smaller than its first natural frequency（236.428Hz）,and the resonance would not happen;the center point displacement and the centroid horizontal movement velocity of slider circle are about 217 mm and 272.87mm/s respectively.All the results are basically consistent with the theoretical one.The structure design achieved the expected requirements of operating performance and could provide theoretical basis for further experimental verification.
出处
《中国农机化学报》
2016年第11期9-14,19,共7页
Journal of Chinese Agricultural Mechanization
基金
国家农业科技成果转化项目(2014C30000162)
"十二五"农村领域国家科技计划课题(2011BAD16B06)
关键词
可调宽窄行
水稻钵苗
螺旋轴组件
有限元分析
虚拟样机分析
adjustable wide-narrow row
rice pot-seedling
screw shaft assembly
finite element analysis
virtual prototype analysis
