Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. In the present paper, an effort has been taken to perform a literature review on the development and performance evaluation of maize shelling machine. Maize shelling or simply maize threshing is the most important aspect of post-harvest operation of maize. It involves detaching of the maize grain from its cobs.
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To provide content to percent d. The activity related to removal not reaching to the farmer level. The er has been designed, developed, of the outer sheath from the plucked estimate of population of agricultur- fabricated and evaluated.
Far m cob called dehusking is mostly al workers indicated the declining women could easily operate the performed by farm women.
It is trend of men workers and increasing machine with right or left hand. The also observed that except beating trend of women workers for farm output capacity with the machine with a stick, removal of grain from operations Anonymous, The done by farm women Singh, The present paper discusses breakage 0.
Two farm was developed at Udaipur Mudgal ation of such a maize dehusker- women one for hand cranking and et al. This machine had a sheller. Both the workers could be bars and the other with rubber strips Methods and Materials shifted during operation to increase to act as dehusking and shelling the continuity in operation.
This dehusker- During the development of the VOL. Farm women lug spacing on each beater was Torque on cylinder shaft was cal- wear loose cloth Saree and are mm, thus, during rotation, a lug culated using following formula: not accustomed with cycling. Design torque was kept the flow cylinder. This feature with the of the cylinder for easy movement same as obtained, i. Both the louverers were made by a human being was considered.
This system consumes low solid lug of a beater to the second suming uniformly distributed load energy because it does not make lug of another beater. Simultaneous- over a simply supported beam. Load fine straw in comparison to spike ly other louverer was welded from was calculated on the basis of cob tooth and rasp bar type threshers. Cob weight of Moreover, with the dehusker-sheller, the third lug of the fourth beater.
Assuming a load there is no need of making straw so Cylinder Diameter of about two un-dehusked cobs the axial flow system was opted. The cylinder diameter, including g weight , thus, g load would be Threshing Cylinder lug height, was mm to achieve on cylinder.
The length of circular The threshing cylinder consisted the peripheral tip cylinder speed of MS shaft was mm to accommo- of beaters, solid lugs and louverers. The large cover, bearings and mm excess der of the axial flow threshing sys- size diameter cylinder was taken shaft to provide the driven sprocket.
This also shaft. An opening on man being to the machine, a chain cided as per the literature and the the bottom cover from the other end sprocket system was selected for diameter of kernel shelled cob was of feeding was provided in half arch transmission of power to a paral- also considered which varied from shaped above 12 mm from perfo- lel shaft; i.
Hence, the concave rated concave for coming out dehu- cylinder shaft with moderate cen- clearance was kept to 35 mm. The sked material from the cylinder. The tre distance. A collar of 65 over feeding which might affect the 5. The hopper height from Where, in dehusking-shelling the un-dehu- ground was 1, mm.
A square mm. This unit was mounted at an n 2 was Therefore, the number opening of mm was provided angle of from horizontal to al- of teeth on the larger sprocket n1 at on this cover from the front side to low free flow of maize grain.
An angle of 6. A wooden handle grip 30 sprocket and also facilitates the grain com- mm diameter and mm long was A small chain pitch of The diameter, provided. Centre distance 9. Design for diameter of shaft to dehusker-sheller. Ac t u a l f a c t o r of s a fe t y w a s mount drive sprocket was done con- Performance of machine checked by sidering torque only. This machine was able be greater than allowable.
Thereafter, the prototype of hand Where,. Assumption, was operated by ten farm women. Output of the dehusker-sheller was calculated. Grain obtained from maize cob at different feed rates while operat- ing the maize dehusker-sheller with farm women is shown in Fig. Shelling efficiency and grain break- age at different cylinder speeds while operating the maize dehusker- sheller with farm women are shown in Fig. Based on the results obtained with this prototype, a computer aided de- sign was prepared for fabrication of the final prototype of the hand oper- ated maize dehusker-sheller.
The orthogonal view of the machine is shown in Fig. This machine was fabricated as per design. The ma- 1 Trapezium shaped 9 Stopper on hinge 17 Handle assembly frame clamp chine was also evaluated with farm 2 Bottom cylinder cover 10 Latch assembly 18 Bolt women Fig.
The data obtained from 5 Bolt 13 Circular clip 21 Safety cover assembly the first prototype was compared 6 Washer 14 Drive sprocket 22 Bolt with final prototype and are given assembly in Table 1.
The manufacturing cost 7 Nut 15 Key 23 Nut of the final prototype of hand oper- 8 Top cylinder cover 16 Driven sprocket ated maize dehusker-sheller is given assembly in Table 2. The cost of operation of Fig.
The shelling efficiency was The graph indi- grain moisture content of While it was Though, The developed maize dehusker- there was not much difference in sheller was evaluated by recording Comparative Performance of Pro- shelling efficiency with both proto- the performance of the machine totypes types. It could be assessed that dried du r i ng hand cran k i ng by far m None of un-dehusked maize cob un-dehusked maize cob might gave women.
The grain moisture content came without dehusking with outlet better shelling. The output in terms was The higher value of coefficient of Table 2 Manufacturing cost of final prototype of hand operated determinant R 2 suggested a second maize dehusker-sheller order polynomial trend.
The polyno- Approximately cost, Rs. The Cylinder shaft, kg 3. Perforated concave including MS bar, kg 6. Bottom conical shaped cover, kg 8. The Sprockets, kg 1.
Safety cover, kg 1. The shelling efficiency was in Transport wheel 4 no. The performance pable of doing the desired job. Journal of totype were almost identical. Conclusions equipment comfortably with either A nony mou s. Popu lat ion left or right hands. Two farm women A hand operated axial flow maize Projections for India and States one for hand cranking and another dehusker-sheller operated by farm Report of the Technical for feeding the cob were required women was designed and devel- Group on Population Projections du r i ng oper at ion of t he mai ze oped.
Farm women could easily op- Constituted by the National Com- dehusker-sheller. Both the workers erate the machine with right or left mission on Population, Govern- could be shifted during operation to hand. The peripheral cylinder tip ment of India, New Delhi In increase the continuity in operation.
Re- Weight of the final prototype of optimum from the grain breakage port No. Horsepower- porting wheels 75 mm diameter h at feed rate of 80 kg un-dehusked Wi k ipedia, the f ree encyclo - were provided for ease in transport.
The dehusking efficiency was pedia. The s-1 cylinder speed. Bosoi, E. Verniaev, I. Theory, Construction and sheller came to Rs.
Oxonian shelling dehusked maize cob and it Ali, U. Singh, A. Soni, and A. Economic p. Johnson, W. Jain, M. Hamdy, and F.
Review on Development and Performance Evaluation of Maize Sheller