Document Type : Original Article
Authors
1
Agricultural Engineering Research Institute (AENRI) Agriculture Research Center, Dokki, Giza, Egypt.
2
Department of Agricultural Structures and Environmental Control Engineering, Faculty of Agricultural Engineering, Al-Azhar University, Cairo, Egypt.
Abstract
Crop residues have become a heavy burden on the Egyptian farmer. The problem could increase the desire to eliminate the crop residual to equip the land for the next crop. To eliminate the insects that result from the stored crop residuals, the difficulty of removing and storing the residues outside the farm and the unavailability of manual labor. This is done by using a machine consisting of a cutting unit and a chopping unit. The cutting unit is tested alone, then the chopping unit alone and the two units are tested together by studying the following variables: feed speed 920, 1100, and 1300 rpm (8.8, 10.5, and 12.4 m/s) respectively, cutting speed 1600, 1800, 2000, and 2200 rpm (18.5, 20.7, 23, and 25.3 m/s) respectively, chopping speed 1500, 1750, 2000, and 2800 rpm (18.8, 22, 25.1, 35.1 m/s) respectively, two sieves (3 and 4 mm). The machine is evaluated through: cutting productivity for the cutting unit, chopping productivity for the chopping unit, Cutting efficiency, and Power Consumed. The most important obtained results may be summarized as follows: the maxims of cutting productivity were 65 kg/h at a cutting speed of 2200 rpm (25.3 m/s) with a feeding speed of 1300 rpm (12.4 m/s), the results obtained when using the cutting speed were 1800 rpm (20.7 m/s), at the feed speed of 1100 rpm (10.5 m/s), and at the chopping speed of 1750 rpm (22 m/s), and with a sieve (3 mm). The best chopping efficiency was (98%), and the results were obtained when using at the chopping speed of 1500 rpm (18.8 m/s) and the feed speed of 920 rpm (8.8 m/s) and with a sieve (3 mm). The less machine power consumption was 257 W.
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