Authors

Abstract

To address low planting qualification caused by inaccurate longitudinal seedling feeding in rapeseed blanket transplanter, a longitudinal auxiliary feeding mechanism was designed.The working principle of the seedling feeding mechanism is elucidated, and mathematical model of mechanics is established. The parameter range of the key components of the longitudinal auxiliary seedling feeding mechanism was determined. A multi-factor test was implemented, evaluating spring tooth thickness (0.2-0.4 mm), height (65-75 mm), and quantity (6-8 units) as independent variables, and the longitudinal compression amount, uniformity coefficient of longitudi-nal seedling delivery, and cutting block qualification rate as evaluation indexes. The test parameters were op-timized using the comprehensive scoring method. The optimization results of the regression model derived from the quadratic orthogonal combination bench revealed test that when the thickness of the spring teeth was 0.29 mm, the height was 74.3 mm, and the number was 10, the longitudinal compression was 11.86 mm, the uniformity coefficient of longitudinal seedling delivery was 0.97, and the qualification rate of cutting was 91.13%. It was verified that the longitudinal compression was 12.6 mm, the uniformity coefficient of longitudinal seedling delivery was 1.08, and the qualified rate of cutting was 93.6 %. The optimization results of the regression model verified by field experiments showed that the planting qualification rate was 92.35 %. Obviously, the experimental results not only successfully achieved the predetermined goal, but also fully met the design requirements. Undoubtedly, this paper provides valuable method reference for the re-search and development of transplanting device.

Abstract in Chinese

针对油菜毯状苗移栽机因纵向送苗精度不足导致的栽植合格率低的问题，设计了一种纵向辅助送苗机构。阐述了该机构的工作原理并建立了力学模型，确定了关键部件的参数范围。采用多因素试验，以弹齿厚度（0.2~0.4 mm）、高度（65~75 mm）及数量（6~8个）为自变量，以纵向压缩量、纵向送苗均匀性系数及切块合格率为评价指标，运用综合评分法优化试验参数。二次正交组合台架试验回归模型优化结果表明：当弹齿厚度0.29 mm、高度74.3 mm、数量10个时，纵向压缩量为11.86 mm，纵向送苗均匀性系数为0.97，切块合格率为91.13%。验证试验结果为纵向压缩量12.6 mm、纵向送苗均匀性系数1.08、切块合格率93.6%。田间试验验证优化模型后，栽植合格率达92.35%，实现了预定目标并满足设计要求，可为移栽装置研发提供方法参考。