The experiments were carried out during the agricultural season of 2003 to evaluate two different systems of harvesting soybean crop to choose the most efficient and economic system as well as to determine the optimum operating conditions for both systems. The first system was harvesting soybean crop by combine harvester (Yanmar-CA760) which was tested at four different forward and cylinder speeds under four various levels of grain and straw moisture contents. The second was harvested by hand sickle then threshed, winnowed by Turkish threshing machine that was tested at four feed rates and cylinder speeds under the same above mentioned moisture contents. All experiments were performed at the research farm of Rice Mechanization Center, Meet El-Deeba, Kafr El-Sheikh Governorate.Results showed that combine harvester (Yanmar-CA760) is strongly recommended since it gave lower losses, damage, costs and higher performance efficiency compared to manual harvesting and gathering followed by mechanical threshing and winnowing using Turkish thresher. The optimum operating conditions for combine harvester (Yanmar-CA760) are at forward speed of 2.6 km/h, cylinder speed of 10.89 m/s and grain moisture content of 18.50%. However, the optimum operating conditions for manual harvesting and gathering followed by mechanical threshing and winnowing using Turkish thresher was at feed rate of 0.5 kg/s, cylinder speed of 11.99 m/s and grain moisture content of 18.50%.
Continuation for unbinding of separating and cleaning seed pea problem and completion spread our investigations in 2008 at 15 Annual Conference of the Miser Society of Agricultural Engineering. The obtained results in this work had been activated and we have done the final design and fabricated in a Workshop in Kafr El-Sheikh Governorate to produce the first specialized machine for separating and cleaning seed pea. Cylinder design with special specifications was used to reduce the exposure of pea seed to impact during the torsion motion. The design used traditional separating theory that helped in seed separation and accelerating the discharge of empty pods and skin from separating chamber to prevent covering and blockage of the concave sieve. After that the mixture of separating fall on oscillating sieve to separate the seed from pods skin. The machine was tested and evaluated under four drum speeds of 8.83, 10.60, 12.36 and 14.13 m/s (375, 450, 525 and 600 r.p.m), three feed rates 6.0, 9.0, 12.0 kg/min, three oscillating shaker speed of 150, 225 and 300 r.p.m (15.7, 23.55 and 31.4 rad/s) and three sieve slope angles of 15, 20, 25 moisture content of 76 % for pods. Machine productivity, separating efficiency, cleaning efficiency, seed losses, seed damage and specific energy had been determined.The results show that, specialized was suitable for separating seed peas with low drum speed 450 r.p.m (10.60 m/s) and 6.0 kg/min feed rate with oscillating shaker 225 r.p.m and sieve slop angle 20. Machine productivity, separating efficiency, cleaning efficiency, seed losses, seed damage and specific energy were 3.40 kg/min, 94.16%, 96.00%, 4.68 %, 1.46% and 11.446 kW.h/ton, respectively.
The objectives of the present study were to construct and evaluate an automatic control system to be used for minimizing grain sorghum loss in straw. Experiments were conducted at Sakha Agriculture Research Station during the summer season of 2005 using grain sorghum (hybrid 102). Experiments were carried out using locally manufactured threshing machine. A gate was used to control the time of staying the threshed materials upon cleaning sieves. The effect of cylinder speed, holding time and feed rate on threshing performance (total seed damage, total seed losses, cleaning efficiency and specific energy) were measured.The construction and use of the automatic control system behind the cleaning sieves reduces grain losses in straw of about 78,80% compared with control treatment at cylinder speed of 26.18 m/s, feed rate of 5 kg/min and holding time 60 sec.In the same manner the highest value of cleaning efficiency was 96.35% at the holding time of 20 sec, cylinder speed 17.42 m/s and feed rate of 5 kg/min for the modified threshing machine. However, the lowest value of specific energy was 10.21 kW.h/Mg at cylinder speed 17.42 m/s, feed rate of 10 kg/min and holding time of 60 sse.The optimum operating conditions were holding time of 40 sec, cylinder speed of 23.61 m/s and feed rate of 7.5 kg/min for its good performance.
The objective of the present study is to construct and evaluate sugar cane shelling machine to be used in sugar cane juice shops. Shelling machine was fabricated on a private workshop in Dosuq city and experiments were carried out at Sakha Agriclture Research Center during summer season 2008 to state the effect of stalk moisture content, feeding and shelling speeds on shelling performance (shelling efficiency, machine productivity, specific energy and shelling cost).Some physical and mechanical properties for sugar cane stalk variety Giza 54-9 were also measured. The obtained data helped in designing and manufacturing the proposed shelling machine.Results showed that, the optimum operating conditions of the proposed prototype was at feeding speed of 500 r.p.m, shelling speed of 1200 r.p.m and stalk moisture content of 61.73%. Whereas it gave shelling efficiency of about 76.14% specific energy of 1.625 kW.h/ton and acceptable machine productivity of 0.670 ton/h. Also the cost calculations indicated that the manual shelling of sugar cane is about 4.51 times of mechanical shelling.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.