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首页> 外文期刊>Agricultural mechanization in Asia, Africa and Latin America >Air-jet Seed Knockout Device for Pneumatic Precision Planters
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Air-jet Seed Knockout Device for Pneumatic Precision Planters

机译：气动精密播种机的喷气种子剔除装置

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摘要

One of the important applications of pneumatic systems is in seed planting machines. A seed knockout device is one of the main components of precision-pneumatic planters for sowing small seeds. Examination of various commonplace plate-type vacuum planters shows that the main reason for low success of plate-type vacuum planters in planting small seeds is the current deficiency in their seed metering mechanism. On the other hand, studies on seed ejection by seed knockout devices are very limited. Therefore, the main objective of the present research is studying seed ejection by a seed knockout mechanism for improving the available plate-type vacuum planters. First, the effective parameters in seed ejection were determined theoretically, then an air-jet seed knockout device was developed and mounted on the seed metering device of a vacuum-precision planter. Subse-rnquently, the influence of effective parameters in seed ejection and that of the knockout device on the planter's performance was tested. Important, effective parameters in seed ejection are the rotational velocity of the seed plate, the air velocity of the air-jet seed knockout device, and the distance of the nozzle tip from the seed plate holes. Independent test variables were rotational velocity of the seed plate at three levels (40, 68 and 99 rpm) and air velocity of the air-jet seed knockout device at three levels (0, 7-8 and 15-16 m/s). Dependent variables included three different types of seed damage, cell filling percentage, and seed viability. Analysis of variance indicated that mechanical damage decreased with increasing air velocity. Test results indicated that, not only did the air-jet seed knockout device decrease seed damage, but also, due to clearing the seed metering plate of cells clogged by broken seeds and plant debris, it increased cell filling percentage and improved overallrnperformance of the seed metering system.
机译：气动系统的重要应用之一是在播种机中。种子剔除装置是用于播种小种子的精密气动播种机的主要组件之一。对各种常见的平板式真空种植机的检查表明，平板式真空种植机在种植小种子方面失败的主要原因是目前它们的种子计量机制不足。另一方面，关于通过种子敲除装置排出种子的研究非常有限。因此，本研究的主要目的是通过种子敲除机制来研究种子排出，以改善可用的板式真空种植机。首先，从理论上确定种子排出的有效参数，然后开发一种气流种子剔除装置，并将其安装在真空精密播种机的种子计量装置上。随后，测试了种子射出中的有效参数以及敲除装置的参数对播种机性能的影响。种子排出中重要的有效参数是种子板的旋转速度，空气喷射种子敲除装置的空气速度以及喷嘴尖端距种子板孔的距离。独立的测试变量是播种板的旋转速度处于三个级别（40、68和99 rpm），而喷气式种子剔除装置的空气速度处于三个级别（0、7-8和15-16 m / s）。因变量包括三种不同类型的种子损害，细胞填充百分比和种子生存力。方差分析表明，机械损伤随风速的增加而降低。试验结果表明，不仅用空气喷射种子敲除装置减少了种子损伤，而且由于清除了种子计量板中被破碎的种子和植物残渣堵塞的细胞，它增加了细胞填充率并改善了种子的整体性能。计量系统。

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    Hassan Zaki Dizaji; Saeid Minaei; Mohammad Reza Y. Taheri;

  • 作者单位

    Agricultural Machinery Engineering Department, Tarbiat Modares University, Tehran, IRAN;

    Agricultural Machinery Engineering Department, Faculty of Agriculture, Tarbiat Modares University, P.O. Box: 14115-336,Tehran, IRAN;

    East Azerbaijan Research Center for Agriculture & Natural Resources, Tabriz, IRAN;

  • 收录信息 美国《工程索引》(EI);
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