Authors

Abstract

To address the issue of height disparity between the output device of the tray placement machine and the seedbed in stacked-tray germination under enclosed conditions - which can lead to vibration and displacement when trays are placed - a slide-type output device with a buffering function equal to the height difference was designed to ensure gentle placement of seedling trays. A three-factor, five-level quadratic orthogonal rotational combination test was conducted using Adams software for simulation analysis. The test factors included the horizontal inclination angle of the tilting frame, the horizontal inclination angle of the sliding plate, and the speed of the seedling tray pusher. Evaluation indices included the qualification rate of tray spacing, the qualification rate of alignment, and the efficiency of tray placement. Test results were analyzed using Design Expert 13 software, and multi-objective parameter optimization was performed. The optimal parameter combination was determined as follows: a tilting frame inclination angle of 15°, a sliding plate inclination angle of 18°, and a tray pusher speed of 0.16 m/s. Field trials conducted to validate these parameters resulted in a 96.11% qualification rate for tray spacing, a 95.89% alignment qualification rate, and a tray placement efficiency of 714 trays per hour - within 1% of the theoretical optimal value. These findings provide a theoretical foundation for the smooth and efficient operation of automatic seedling tray placement machines.

Abstract in Chinese

针对现有叠盘暗室育秧模式下摆盘机因其出盘装置与苗床之间存在高度落差，秧盘着床时易产生震动位移，导致秧盘摆放不整齐的问题，设计了一种具有落差缓冲能力的滑板式出盘装置，实现秧盘无震颤平稳摆放。通过Adams软件仿真分析，以倾斜架水平倾角、出盘滑板水平倾角、推盘推杆速度为试验因素，秧盘间距合格率、排齐率、摆盘效率为试验指标，进行三因素五水平二次正交旋转组合试验。应用Design Expert 13软件对试验结果进行分析并进行多目标参数组合优化，得到仿真最佳参数组合为：倾斜架水平倾角为15°，出盘滑板水平倾角为18°、推盘推杆速度为0.16m/s，该条件下秧盘间距合格率为96.25%，排齐率为96.16%，摆盘效率为722盘/h。对最优参数组合进行田间验证试验得到秧盘间距合格率为96.11%，排齐率为95.89%，摆盘效率为714盘/h，与理论优化值误差小于1%。研究结果为摆盘机平稳摆盘提供理论基础。