DESIGN, DEVELOPMENT AND PERFORMANCE EVALUATION OF TRACTOR OPERATED ONION DIGGER

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dc.contributor.advisorJogdand, S.V.
dc.contributor.authorGautam, Amita
dc.contributor.otherNaik, R.K.
dc.contributor.otherTrivedi, Jitendra
dc.contributor.otherSaxena, R.R.
dc.contributor.otherVictor, V.M.
dc.date.accessioned2022-03-24T07:10:35Z
dc.date.available2022-03-24T07:10:35Z
dc.date.issued2021
dc.descriptionDESIGN, DEVELOPMENT AND PERFORMANCE EVALUATION OF TRACTOR OPERATED ONION DIGGERen_US
dc.description.abstractOnion has an important place in Indian cuisine due to its taste improving property. Various Indian dishes include use of onion chopped in different sizes to increase taste of recipe. Onion is grown in two or three seasons in different parts of India. To fetch a higher market price, timely harvesting of onion crop is essential. If delayed, possibilities of losses increase due to rain and other factors. Harvesting of onion bulbs is carried out by the soil primarily as the bulbs develop underground. Generally onion harvesting of onions is performed manually by small and medium farmers of Chhattisgarh. This is a laborious and time consuming process therefore a tractor operated onion digger was designed, developed and tested at S.V.C.A.E.T & R. S. Raipur. Various parameters were considered for design of onion digger viz. engineering properties of onion bulb, agronomical characteristics of onion crop, soil parameters and various machine components. Based on agronomical parameters i.e. depth of onion bulb and row spacing the size of the digger was conceived. The working width of digging blade was kept 600 mm, designed to work up to 100 mm depth from ground surface. The required power to operate the onion digger was calculated as 14.04 kW. Based on soil draft working on the digging unit a 6 mm thick MS sheet (AISI 1018) was used to manufacture digging blade. Three different blade shape viz. V-shape blade, serrated and flat blade were fabricated to find out the best working blade for the onion digger, and finite element analysis was conducted with the help of computer software ANSYS-R1-2021 to test the material of blade. The size of the separator was decided based on working width and volume of dugout material handled by separator during onion digging, total length of separator was determined as 760 mm which was made up by attach square bars parallel in the link attachment chain. The speed of the separator and inclination angle was selected by laboratory testing, in which three separator velocities (0.5, 1.0 and 1.5 m s-1) and five inclination angle (10, 15, 20, 25 and 30°) was analyzed statistically with the help of randomized block design. The rotary power from tractor PTO was used to drive the separator with the help of transmission unit, which consist PTO bush, universal joint, gear box unit and chain drive from PTO of tractor to separator unit. A windrowing unit was attached behind the digger just below the separator to reduce the impact of sudden fall of onion behind it and also discharge the onion in center of the machine. The overall dimension of the developed onion digger was 1500×850×800 mm, which was small in size to reduce the capital cost and make it affordable for small farmers. The prototype of onion digger was tested in the experimental field to evaluate its performance. Factorial randomized block design was used to analyze the effect of independent variables viz. blade shape (V-shape, serrated and flat blade), rake angle (15, 20 and 25°), separator velocity ( 0.7 and 1.0 m s-1) and forward speed (2.0, 2.5 and 3.0 km h-1) on damage per cent, separation Index and digging efficiency with their three replications. After test best result was found in V-shape blade with rake angle 20°, at separator velocity 0.7 m s-1 when the forward speed was 2.0 km h-1, at this setting damage per cent of onion bulb was minimum and digging efficiency was maximum i.e. 0.82 per cent and 99.02 per cent respectively. The fabrication cost of developed onion digger was calculated ₹ 28,120/-. Cost of operation of developed onion digger and with manual method were found ₹ 3,346.72/- per hectare, and ₹ 17,121.74/- per hectare, respectively.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810183786
dc.keywordsOnion harvesting; onion digger; physical; engineering properties; onion bulb; design; onion digger; digging efficiencyen_US
dc.language.isoEnglishen_US
dc.pages257p.en_US
dc.publisherINDIRA GANDHI KRISHI VISHWAVIDYALAYA RAIPUR (Chhattisgarh)en_US
dc.research.problemDESIGN, DEVELOPMENT AND PERFORMANCE EVALUATION OF TRACTOR OPERATED ONION DIGGERen_US
dc.subFarm, Machinery and Poweren_US
dc.themeDESIGN, DEVELOPMENT AND PERFORMANCE EVALUATION OF TRACTOR OPERATED ONION DIGGERen_US
dc.these.typePh.Den_US
dc.titleDESIGN, DEVELOPMENT AND PERFORMANCE EVALUATION OF TRACTOR OPERATED ONION DIGGERen_US
dc.typeThesisen_US
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