مطالعه عوامل مؤثر بر عملکرد موزع استوانه‌ای نیوماتیکی دقیق برای کاشت بذر آویشن

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه مهندسی مکانیک بیوسیستم، دانشکده کشاورزی، دانشگاه ارومیه، ارومیه، ایران

چکیده

برای کاشت غلات از کارنده­های دقیق نیوماتیکی استفاده می­شود. اما استفاده از این کارنده‌ها برای کاشت بذرهای کوچک گیاهان دارویی فاقد روکش بسیار مشکل است. هدف از این مطالعه، بررسی عملکرد موزع استوانه­ای نیوماتیکی برای کاشت بذر آویشن بدون روکش و تعیین شرایط بهینه آن بود. برای این منظور اثرات چهار عامل فشار مکش 6-، 8- و 10- کیلو پاسکال، سرعت خطی موزع 03/0، 04/0 و 05/0 ­متر در ثانیه، قطر سوراخ موزع 4-10*5 و 4-10*7  ­متر و شکل سوراخ  مخروطی و مستقیم بر روی سه شاخص نکاشت، چندکاشت و کیفیت کاشت برای بذر آویشن مورد بررسی قرار گرفت. آزمایش­ها در 5 تکرار به روش فاکتوریل و در قالب طرح کاملا تصادفی انجام شد. نتایج نشان داد که فشار مکش و سرعت خطی موزع تأثیر معنی­داری بر شاخص­های مورد نظر دارد. بهترین عملکرد موزع در فشار 10- کیلو پاسکال، سرعت خطی موزع 3 سانتی­متر در ثانیه، قطر سوراخ موزع 7/0 میلی­متر و شکل سوراخ مخروطی بدست آمد. در این شرایط، مقادیر شاخص­های نکاشت، چندکاشت و کیفیت کاشت به ترتیب 4/0، 4/4 و 2/95 درصد به دست آمد.

کلیدواژه‌ها


عنوان مقاله [English]

Study of the Affecting Factors on the Performance of Precision Pneumatic Cylindrical Distributor for Sowing Thyme Seed

نویسندگان [English]

  • Adel Hakimi
  • Rahman Farrokhi Teimourlou
Department of Mechanical Engineering of Biosystems, Faculty of agriculture, Urmia University, Urmia, Iran
چکیده [English]

Pneumatic precision seeders are used for sowing of cereals. However, sowing small uncoated seed of medical plants is very difficult by these seeders. The purpose of this study was to investigate the performance of the pneumatic cylinder distributor to sow uncoated thyme seed and to determine its optimal conditions. The effects of four factors were investigated: the suction pressure at -6, -8, -10 kPa, the linear velocity of distributor at 3, 4, 5*10-2 m. s-1, the diameter of the distributor hole at 5, 7*10-4 m and the seed hole shape in conical and straightforward forms. In order to estimate the distributor yield, three indices of miss index, multiple index and quality of feed index for thyme were examined. The experiments were performed in 5 replications by the factorial method in a completely randomized design. The results showed that the suction pressure and linear speed of the distributor had a significant effect on the indices. The best performance of the distributor unit was obtained at -10 kPa pressure, 3*10-2 m. s-1 linear speed of the distributor, 7*10-4 m diameter for the distributor hole and the shape of the conical hole. Under these conditions, the values of miss, multiple and quality of feed indices resulted in 0.4%, 4.4%, and 95.2%, respectively.

کلیدواژه‌ها [English]

  • Small seeds
  • Uncoated seed
  • Feed indices
  • Suction pressure
  • Pneumatic precision seeders
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