Mathematical Modeling of the Processes of Mowing, Oriented Feeding, and Chopping of Stalk Forage by a Forage Harvester
Abilzhanuly T. Iskakov R. Nurgozhayev S. Abilzhanov D. Seipataliyev O. Kosherbay D.
December 2024Multidisciplinary Digital Publishing Institute (MDPI)
AgriEngineering
2024#6Issue 44766 - 4785 pp.
The design and technological scheme of a small-sized forage harvester with a capture width of 1.35 m equipped with a device oriented along the length of the stems was developed in this study. As a result of theoretical studies, the process of the movement of mass into the chamber of the mowing rotor due to centrifugal forces was revealed. The speed of mass movement and the average size of crushed particles with the mowing rotor were determined. The oriented feeding process of stems in the chamber of the chopping rotor is mathematically described in this paper. An analytical expression is obtained for determining the average size of crushed particles by the forage harvester, that is, a mathematical model of the processes of mowing, oriented feeding, and the chopping of stem fodder by the forage harvester. Laboratory and field tests of a forage harvester equipped with a device oriented along the length of the stems were conducted. The combine harvester’s productivity was 6.14 t/h when mowing alfalfa. Special experiments were conducted to determine the average size of crushed particles after the mowing rotor. The average size of crushed particles with the mowing rotor was 147.4 mm, while the theoretical value was 144 mm. The difference between these values was only 2.31%. A special experiment was conducted on the combine without an orienting device to compare the quality indicators. The mass fractions of crushed particles of up to 50 mm in length when the combine was operating with and without an orienting device were 79.3 and 46.7, respectively. Accordingly, the average length of crushed particles was 33.79 mm and that without an orienting device was 77.07 mm. The theoretical value of the average length of crushed particles was 34.9 mm (i.e., the difference between the theoretical and actual value of the average size of the crushed particles was only 3.25%). All this proves that when the combine harvester was operated with an orienting device, there was a significant increase in the quality indicators of the chopped feed, and the reliability of the theoretical studies and the resulting mathematical model were determined.
average cutting length , mathematical model of mowing and chopping processes , mowing process , orienting device , process of stems entering the chamber , small-sized forage harvester
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Scientific Production Center of Agricultural Engineering, Department of Animal Husbandry Mechanization, Almaty, 050005, Kazakhstan
Technical Faculty, S.Seifullin Kazakh Agrotechnical Research University, Astana, 010000, Kazakhstan
Scientific Production Center of Agricultural Engineering
Technical Faculty
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