高级检索+

油菜基质块苗移栽机双向递进式送苗装置设计与试验

Design and Experiment of Two-way Progressive Seedling Feeding for Rape Substrate Transplanters

  • 摘要: 针对油菜移栽机以半自动化为主,缺乏与基质块苗取苗机构相匹配送苗装置的问题,设计了一种油菜基质块苗移栽机双向递进式送苗装置。阐述了送苗装置工作过程,测定了油菜载苗基质块力学特性,确定了送苗过程中载苗基质块稳定输送的工作参数,构建了送苗过程中横向递进送苗阶段和纵向连续送苗阶段运动学模型。以苗框底高、上导杆高度、纵向送苗速度为因素,送苗同步率、送取苗成功率为评价指标,开展了单因素试验和三因素三水平二次正交组合试验。单因素试验结果表明:当苗框底高为5~25 mm、上导杆高度为45~55 mm、纵向送苗速度为80~140 mm/s时,送苗效果较好。二次正交组合试验结果表明:苗框底高为10.7 mm、上导杆高度为50.0 mm、纵向送苗速度为140.0 mm/s时送苗效果较优,较优参数组合下台架试验得出送苗同步率为94.54%,送取苗成功率为93.13%,田间验证试验结果表明送苗同步率为92.20%,满足油菜移栽机送苗技术要求。

     

    Abstract: In order to solve the problem that the rape transplanter is mainly semi-automatic and lacks the seedling feeding device matching with the substrate block seedling separating mechanism, a two-way progressive seedling feeding device for rape substrate transplanter was designed. The working process of the seedling delivery device was described, the mechanical properties of the substrate block were measured, the working parameters of the stable transportation of the substrate block were determined, and the kinematic models of the lateral progressive seedling delivery stage and the longitudinal continuous seedling delivery stage were constructed. The single factor experiment and three factor three level quadratic orthogonal combination experiment were carried out with the bottom height of seedling frame, the height of upper guide rod, the longitudinal seedling delivery speed as the factors, the synchronization rate of seedling delivery and the success rate of seedling delivery as the evaluation indexes. The results of single factor test showed that when the bottom height of seedling frame was 5~25 mm, the height of upper guide rod was 45~55 mm, and the longitudinal seedling feeding speed was 80~140 mm/s, the seedling feeding effect was better. The results of quadratic orthogonal combination test showed that when the bottom height of seedling frame was 10.7 mm, the height of upper guide rod was 50.0 mm, and the longitudinal seedling delivery speed was 140.0 mm/s, the seedling delivery synchronization rate was 94.54%, and the success rate of seedling delivery was 93.13%. The results of field verification test showed that the seedling delivery synchronization rate was 92.20%, and the success rate of seedling delivery was 88.30%, which met the requirements of rape transplanter. The research result can provide a reference for the structural improvement of the transplanter.

     

/

返回文章
返回