DEVELOPMENT AND TESTING OF MINI COMBINE HARVESTER.

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dc.contributor.advisorThakare, Dr. S. H.
dc.contributor.authorKARHALE, SANDIP SHAMRAO.
dc.date.accessioned2023-01-02T21:07:46Z
dc.date.available2023-01-02T21:07:46Z
dc.date.issued2022-09-12
dc.descriptionThe present investigation was undertaken during the year Kharif 2019-20 and Kharif 2020-21 which was carried out at the Department of Farm Power and Machinery, PGI, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola.en_US
dc.description.abstractThe present investigation was carried out during Kharif 2019 and 2020 on “Development and Testing of Mini Combine Harvester” at the Department of Farm Power and Machinery, Post Graduate Institute, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola (M.S.). The results indicated that, Paddy is one of the most important crops for food security in India, contributing significantly towards providing food and livelihood for 130 million people. The area under paddy cultivation in India is around 44 million ha with production of 105 million tons in 2019. As per Bureau of Indian Standards, combine-harvester-thresher popularly known as combine harvester is defined as a machine designed for harvesting, threshing, separating, cleaning, collecting and unloading grain while moving through the standing crop. Mini combines consist of a cutting mechanism attached to a travelling thresher. The ultimate purpose of any combine harvester equipment is to recover the grain, free from plant residue, with a minimum of grain loss. The harvester should have facilities for varying speeds of different working components like machine forward speed, threshing cylinder speed, blower speed and speeds of header unit which includes reel cutter bar speeds depending upon the type of crop and field conditions. In mini combine harvester an ordinary farm tractor was used to power the combine harvester, which is attached to one side and has the cutting mechanism at the front. A suitable size of tractor was selected to match the power and speed requirements of different working components of machine as the power requirement for harvesting and threshing of different crops may vary due to type of crop and its variety, grain-straw ratio, machine size and design. A prototype of mini combine harvester for harvesting of selected varieties of paddy crops has been developed and fabricated by using the designed parameters of functional components viz., reel speed, cutter bar speed, feed rates of platform auger, feeder conveyor, type of threshing cylinder and its speed, blower and power transmission system. A newly developed mini combine harvester performs four major operations- it cuts the crop, conveys the harvested crops to threshing unit or beats the panicle from the plants, separates the grains from the straw and cleaned paddy grains collected in collection tank. The essential parts of mini combine harvester are cutting unit, header assembly unit, platform assembly, feeder conveyor, thresher assembly and blower assembly. These units were mounted on a tractor with provision for mounting a thresher. The evaluation of combine harvester was carried out at selected parameters by maintaining the forward speed of 3.5, 4.0 and 4.5 km h-1. The combine harvester was tested for a period of six hours continuously and the performance was evaluated. The performance was analyzed in terms of threshing efficiency, cleaning efficiency, broken percentage, blown off grains, unthreshed grains and header loss for the tested varieties. Similarly evaluation trials were conducted for paddy varieties by maintaining forward speed. This mini combine harvester was developed and tested for machine parameters like cylinder speed (14, 15 and 16 m s-1), forward speed (3.5, 4.0 and 4.5 km h-1) and crop parameter viz., grain moisture content (18 to 22 %) were studied in relation to threshing efficiency, cleaning efficiency and total grain losses for fine and coarse paddy varieties. Moisture content of 18 %, cylinder speed of 15 m s-1 and forward speed of 4.0 km h-1 was found satisfactory for harvesting of fine paddy variety PKV-HMT and PKV-TILAK. Moisture content of 18 %, cylinder speed of 16 m s-1 and forward speed of 4.5 km h-1 was found satisfactory for harvesting of coarse paddy variety PKV- KISAN and PKV- KHAMANG. Moisture content was the most important factor influencing threshing efficiency, cleaning efficiency and total grain losses followed by cylinder speed and forward speed in fine and coarse varieties. In fine paddy varieties, the average threshing efficiency varied from 99.78 to 99.82 %, whereas cleaning efficiency varied from 99.15 to 99.17 %. The pre harvest losses varied from 30.58 to 30.80 kg ha-1. In coarse paddy varieties the average threshing efficiency varied 99.73 to 99.64 %, whereas cleaning efficiency varied from 98.95 to 99.14 %. The pre harvest losses varied from 29.10 to 29.20 kg ha-1. In fine varieties the total losses varied from 1.43 to 1.64 % and 1.34 to 1.45 % in coarse paddy varieties at said parameters. The cost of operation of the developed combine harvester was found to be Rs. 2303 per ha against Rs. 5400 per ha required for harvesting and threshing of one ha area by conventional method. The breakeven point and payback period of thresher was 340 hours per annum and 3.22 years respectively. The B:C ratio was found to be 1.62 in paddy harvesting. The mini combine harvester was found economical and viable because of negligible breakage losses and less break- even point, resulted more beneficial for small and medium paddy farmers.en_US
dc.identifier.citationKARHALE, SANDIP SHAMRAO. (2022). Development and testing of mini combine harvester. Department of Farm Power and Machinery, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. Ph.D. 2022. Print. xxvi, 269p. (Unpublished).en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810191016
dc.keywordsMini combine harvester, Combine harvester losses, Paddy harvesting, Threshing efficiency.en_US
dc.language.isoEnglishen_US
dc.pagesxxvi, 269p.en_US
dc.publisherDr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.en_US
dc.research.problemIn the present to study the engineering properties and threshing parameters of the paddy crop as related to combine harvesting, develop tractor operated mini combine harvester mechanism for paddy harvesting, test the performance of developed tractor operated mini combine harvester mechanism, and study the cost economics of developed tractor operated mini combine harvester mechanism.en_US
dc.subFarm, Machinery and Poweren_US
dc.themeThe present investigation deals with the development and testing of the mini combine harvester, their harvesting losses, testing of different paddy varieties, optimization of crop-machine parameters, and their operating conditions.en_US
dc.these.typePh.Den_US
dc.titleDEVELOPMENT AND TESTING OF MINI COMBINE HARVESTER.en_US
dc.typeThesisen_US
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