An Evaluation of a Vacuum Distribution Device for Seed Pick-Up Regularity of A Multiple -Rows Pneumatic Plate

Elebaid Jabir, Abdelkarim Dafaalla Alfadilb
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Abstract

The aim of the study was to investigate the effect of an adjustable vacuum distribution device on seed pick-up similarity of a multiple-rows pneumatic plate metering device due to unequal rows performance. A completely vacuum opened angle of the device (30°), Six vacuum opening angles (5°, 10°, 15°, 20°, 25° and 30°) and different angles set up on rows (4°, 7°, 10° and 30° through row 1,2,3, and 4, respectively) were separately examined at six rotating speeds. Results revealed that under same speed and same vacuum opening angle, an increase in vacuum provided more consistent rows pick-up, while increase in angle increased rows pick-up coupled with the increase in their variation. Row1 and row4 generally tend to have the highest and lowest seed pick-up, respectively, under most of investigated angles and speeds. Rows consistency CV declined under the increase of both opening angle and velocity. Results of different rows angles set up were found to be better than those of the same angle. Different rows angles resulted in better rows CV value of 2.01%, 1.78%, 1.89%, 1.34%, 1.77% and 2.45% at speed of 5, 10,15,20,25 and 30 r.min-1, respectively. Results concluded that vacuum distribution device could be acceptably used for improving rows performance, but further studies are necessary to develop an outside-control method for easy application.
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多排气动板抽种规律的真空分配装置评价
本研究的目的是探讨可调真空分配装置对多排气动板计量装置在不同排性能下取种相似性的影响。在6种转速下,分别检测了装置的完全真空打开角度(30°)、6个真空打开角度(5°、10°、15°、20°、25°和30°)以及排上设置的不同角度(分别通过第1、2、3和4排设置的4°、7°、10°和30°)。结果表明,在相同速度和相同真空开启角度下,真空度的增加使排吸更加一致,而角度的增加使排吸增加,并且排吸变化也增加。在大多数角度和速度下,行1和行4的收粒率分别最高和最低。排一致性CV随开角和开速的增大而减小。不同排角设置的效果优于相同排角设置的效果。在5、10、15、20、25和30转min-1转速下,不同排角的排CV值分别为2.01%、1.78%、1.89%、1.34%、1.77%和2.45%。结果表明,真空分配装置可用于提高排料性能,但需要进一步研究开发一种易于应用的外部控制方法。
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