窝眼窄缝式气吸滚筒排种装置的试验

Seeding experiments of suction cylinder-seeder with socket-slot

为了实现超级稻工厂化育秧,保证作业质量,研制了窝眼窄缝式气吸滚筒排种试验装置。以超级稻"培杂泰丰"为研究对象,采用4因素3水平正交试验设计方法,研究了窝眼半径、窄缝宽度、真空度和滚筒转速对播种空穴率、重播率和合格率的影响规律。通过对试验结果的分析,得出了影响空穴率和合格率的主次顺序为窝眼半径>真空度>滚筒转速>窄缝宽度;影响重播率的主次顺序为窝眼半径>滚筒转速>窄缝宽度>真空度;最佳参数组合为窝眼半径5.5mm、真空度4kPa、滚筒转速为0.82rad/s和窄缝宽度1mm。经验证,在最佳参数下,播种空穴率、重播率和合格率分别为4.88%、9.78%和85.34%。尽管性能有待提高,但窄缝不发生堵塞,表明这是一种具有应用前景的精密播种装置。

In order to achieve the nursing seedlings of super hybrid rice for factory production,and assure its working performance,the suction cylinder-seeder with socket-slot for experiment was designed and produced. The super hybrid rice Peizataifeng was selected as experimental object,and the effects of socket radius,slot width,vacuum and cylinder speed on cavity rate,reseeding rate and qualified rate of seeding were studied by the four factors and three-level orthogonal experimental method. Results indicated that the orders affecting cavity rate and qualified rate was socket radius vacuum cylinder speed slot width,and the order affecting reseeding rate was socket radius cylinder speed slot width vacuum. The optimal parameter combination was socket radius with 5.5 mm,vacuum with 4 kPa,cylinder speed with 0.82 rad/s and slot width with 1 mm. The cavity rate,reseeding rate and qualified rate of seeding were 4.88%,9.78% and 85.34% respectively under condition of the optimal parameters. Although seeding performance should be further improved,the slots are never plugged,which shows that the seeder is a precision seeding device with good application prospect.