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Type of publication: research article
Type of publication (PDB): Straipsnis konferencijos medžiagoje Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or Scopus DB conference proceedings (P1a)
Field of Science: Mechanikos inžinerija / Mechanical Engineering (T009)
Author(s): Špokas, Liudas;Steponavičius, Dainius
Title: Comparison of working quality of combine harvesters equipped with a single threshing rotor
Is part of: Rural development 2011 : 5th international scientific conference, 24-25 November, 2011, Akademija : proceedings. Akademija : Aleksandras Stulginskis University, Vol. 5, b. 1 (2011)
Extent: p. 448-455
Date: 2011
Keywords: Combine-harvester;Grain damage;Grain losses;Fuel consumption
Abstract: Operation quality of two combine-harvesters A and B equipped with a single axial threshing rotor have been tested paying special attention to grain separation losses, grain damage, amount of impurities in the grain, and fuel consumption. The relationship between the feedrate of winter wheat Ada and Ebi supplied into the combine and the mentioned operation factors has been defined. It has been determined that when the feedrate of the winter wheat has been increased from 3.4 to 27.2 kg s-1 combine-harvesters A and B have not exceeded the permissible 1% grain damage limit. The least grain damage (0.2%) has occurred when the feedrate of 20 kg s-1 has been supplied into the threshing-separation apparatus. Then the grain separation losses of both combines have been approximately 0.4%. Hourly fuel consumption of the combine B when idling with switched on technological gears equals to about 4 liters, when driving through the field stubble it is about 3 liters, and while harvesting the winter wheat it is about 8 liters greater than the hourly fuel consumption of the combine A. It has been destined by the peculiarities of combine design and because the maximum rotational speed of the combine B engine during its operation has been greater by 200 min-1. When the stubble height of the wheat has been increased from 80 to 150 mm, the wheat feedrate supplied into the combine A moving at the same speed has been 3.1 kg s-1 less. Thus hourly fuel consumption of the engine has been reduced by approximately 11 liters or by 0.3 liters to thresh a ton of grain. The hourly efficiency of the combine-harvester A in technological time while harvesting winter wheat Ada equals to 35.9±1.8 t, and while harvesting winter wheat Ebi it is by 1.1 t greater. Combine A has threshed about 2.4 t more grain and harvested by 0.25 ha greater crop area if compared with combine B, because its cutting bar is by 1.5 m wider
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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