پديد آورنده :
رئيسي نافچي ، احمد رضا
عنوان :
ارزيابي ، طراحي مجدد و بهينه سازي مكانيزم ريزش ني در قلمه كار نيشكر
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
﴿مكانيك ماشينهاي كشاورزي﴾
محل تحصيل :
اصفهان : دانشگاه صنعتي اصفهان ، دانشكده كشاورزي
صفحه شمار :
شانزده ، 128 ، [II] ، ص : مصور ، جدول ، نمودار ، شكل
يادداشت :
ص . ع : به فارسي و انگليسي
استاد راهنما :
سيد جليل رضوي
توصيفگر ها :
كشت دستي ، مكانيزه , نوع واريته ، لاستيك , تسمه نقاله , موزع استوانه اي ، زنجيري , دستگاه تست ريگ , طراحي شاسي
استاد داور :
مرتضي صادقي ، جهانگير عابدي
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Abstract In recent years many efforts have been made to mechanize sugarcane plantingwith the aim of reduction in production costs Mechanized planting can have suchadvantages like labor cost reduction as compared to non mechanized method Otheradvantages include speed accuracy and timeliness of conducting planting operation On the other hand problems such as inaccurate machine performance may result in areduction of the farmland productivity A sugarcane billet planter used in Sugar CaneDevelopment Co in Khuzestan province in Iran was evaluated to determine factorsaffecting its performance This machine has been reproduced based on reverseengineering design according to an Australian two row billet planter Factors related toits performance were divided to those dependent on soil tillage conditions wheel typeand forward speed and those factors independent of field performance drop tubecover vibrator on metering belt and tip angle of billet picking mechanism Wheelsused in the field experiments consisted of the original wheel used on the Australianmachine wheels used on the copied machine taken from lift trucks and metal wheelsmade for test purposes in this study Soil tillage related factors were tested in the fieldand factors independent of soil tillage conditions were tested on a test rig constructedfor this purpose in the laboratory The test rig was designed and built so that a widerange of field speeds could be simulated for various test conditions Computer softwares such as Inventor Catia and Maple were used to draw the test rig drawings andperform stress analysis on designed sections The test rig forward speed was calibratedwith varying voltage frequency of an electric motor using a 10 HP Delta inverter Tostudy movement behavior of the billets in the path from holding box to the ground Aclosed caption camera system was used Certain physical properties of sugarcane billetssuch as unit linear mass and diameter were determined Homogeneity of plantingoperation was determined using low overlap and high overlap indices A completelyrandomized design with three replications was used to determine the effect of factorsmentioned above on the performance of the planter considering the law and highoverlap indices Data analysis was performed by SAS and MSTATC soft wares Resultsof laboratory tests indicated that the billet packing strips with tip angle of 90 degreesand use of cover on drop tubes and lake of vibrator had a significant effects on overlapindices Field tests using picking strips with 90 degree tip angle and cover on drop tubeswere performed Results indicated that the best forward speed for better performance ofthe planter was 2 kilometers per hour Type of wheel had no significant effects on theperformance of the machine perhaps due and acceptable soil tillage condition present atthat time of running this experiment
استاد راهنما :
سيد جليل رضوي
استاد داور :
مرتضي صادقي ، جهانگير عابدي
