نوع مقاله : مقاله پژوهشی
نویسنده
گروه مهندسی مکانیک بیوسیستم، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
One of the most important agricultural operations in wood fields, row crop fields, gardens, and traditional greenhouses is disturbing the topsoil, and removing weeds. In this research, a lightweight (65 kg) rotary-weeder machine with a 5-hp engine and a walk-behind rotary unit was designed, manufactured, and evaluated. A single-speed planetary gearbox was used to transmit the engine power through a power transmission shaft and a 90-degree final reducer to the blades assembled in front of the machine. Using a planetary gearbox and providing the torque needed for tillage operations caused a significant weight reduction in the device compared to conventional rototillers. The working width of the cultivator unit can be changed from 15 to 60 cm with 6 C-shaped blade flanges. The tests were carried out with 3 rotation speeds of the rotary unit (200, 250, and 300 rpm) and in vegetation conditions as a completely random basic design experiment. The field evaluation results show that the machine has a higher operating speed and more satisfactory performance compared to conventional agricultural rotary tillers for churning, aerating the topsoil, and removing weeds. Because the rotary unit is mounted in the front, it has better maneuverability especially when it works between the rows. However the increase in the blade's axis rotation increases the speed of traveling, the results of the statistical analysis showed that the increase in the blade's axis rotation causes the particles of tilled soil to become finer (F: 5%). Also, by increasing the rotation of the blade’s axis, the intensity of the device's operation is more suitable in the conditions of maximum vegetation and prevents the locking of the rotary axis.
کلیدواژهها [English]
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