THE MOMENT FROM THE EFFORT OF FRICTION OF THE GRASS MASS ON THE DISC KNIFE OF THE CUTTING MACHINE
Kholodiuk Oleksandr - Ph.D, Senior Lecturer of the Department of "Operation of a machine-tractor park and technical service" of Vinnytsia National Agrarian University (3, Sonychna St., Vinnytsia, 21008, Ukraine, e-mail:firstname.lastname@example.org ).
Kuzmenko Volodymyr - Ph.D, Senior Researcher, head of the department "Biotechnical systems in animal husbandry and harvesting of feeds" of the National Scientific Center of the Institute of Mechanization and Electrification of Agriculture (11, Vokzalna St., Glevakha, Vasylkivskyi district, Kyiv region ., 08631, Ukraine, e-mail: email@example.com ).
The shredder is the main and most energy-consuming unit of any forage harvester. Its design determines the technological scheme of the machine and the location of its main joints. Pull-type and self-propelled forage harvesters are equipped with disc and drum shredders, which have become widespread. Beater-knife cutters are installed on balers.
In general, the work which is done on grinding the grass mass includes grinding (compression, cutting, friction), transportation of leaf mass, as well as the cost of idle motion of the working parts. A characteristic feature of the bither-knife apparatus under the study is the use of active disc knives, which cut a portion of the leaf mass. Therefore, the determination of the moment of friction forces on the side surfaces of the disk knife of the shredder is important for an objective assessment of the energy density of the process of grinding the grass mass.
The object of the study was the process of transporting the cut portion of the grass mass with the fingers of the feed rotor through the disc knives in the forming channel of the biter-knife shredder. The purpose of the work was to establish the analytical dependences of the moment and the work on the friction forces of the grass mass on the side surface of the disk knife of the biter-knife shredder. The task of the work was: to analyze researches and publications on cutting the material (soil, plant debris, plant stems) with a disk knife and their interaction during the process; to determine the area of the part of the disc knife that is in direct contact with the grass mass; to establish the total force of action of the cut layer of the stem mass and the analytical dependences of the torque and work on the force of friction of the grass mass on the side surface of the disk knife of the shredder. The research methodology was based on the analysis of the interaction of the cut portion of the grass mass with the side surface of the disc knives in the formation of channels of the grinding apparatus using the methods of theoretical mechanics.
In the work were established the direction of the absolute vector of speed and friction force of the grass mass on the side surface of the disk knife; was determined the area of the surface of the blade disk bounded by the bottom of the shredder and the blade of the knife and the area (6) of the part of the disk knife that is in direct contact with the grass; was established the total force (7) of action of the cut layer of the stem mass. The analytical dependences of the torque (9) and work (10) on the friction force of the grass mass on the side surface of the disc knife of the shredder are given.
It is established that the coefficient of friction of the movement while harvesting lucerne for soliage with a humidity of 45-55% depending on the speed og rotation and pressure on the side surface of the knife takes the magnitude within the limits of fд = 0,25 – 0,55.
 Reznik N. Ye. (1975). Teoriya rezaniya lezviyem i osnovy rascheta rezhushchikh apparatov. Moskva: Mashinostroyeniye. [in Russian].
 Mel'nikov S. V. (1978). Mekhanizatsiya i avtomatizatsíya zhivotnovodcheskikh ferm. Leningrad : Kolos. [in Russian].
 Kuz'menko, V. F., Kholodyuk, O. V. (2014). Biterno-nozhevoy rezhushchiy apparat s diskovymi nozhami. Nauchno-tekhnicheskiy progress v sel'skokhozyaystvennom proizvodstve, (3 t. 1), 224–230. [in Belarus].
 Kanarev F. M. (1983). Rotatsionnyye pochvoobrabatyvayushchiye mashiny i orudiya. Moskva : Mashinostroyeniye. [in Russian].
 Kobyakov, I. D. (2008). Issledovaniye raboty pluzhnogo diskovogo nozha. Tekhnika v sel'skom khozyaystve, 2, 6–8. [in Russian].
 Medvedev, V. I., Konstantinov, YU. V., Akimov, A. P., (2001). Obobshchennaya matematicheskaya model' vzaimodeystviya diskovogo nozha s pochvoy. Traktory i sel'skokhozyaystvennyye mashiny, 2, 34–37. [in Russian].
 Akimov, A. P., Konstantinov, YU. V., (2005). Skol'zheniye-buksovaniye diskovogo nozha v pochve i yego silovyye kharakteristiki. Traktory i sel'skokhozyaystvennyye mashiny. 4, 30–34. [in Russian].
 Dubrovin, V. O., Holub, H. A., Skorobohatov, D. V. (2007). Obgruntuvannya diametra dyskiv podribnyuvacha stebel syderalʹnykh kulʹtur. Naukovyy visnyk NAU, (107), 388-392. [in Ukrainian].
 Korchak, M. M. (2009). Teoretychni doslidzhennya vplyvu dyskovoho nozha na protses rozrizannya roslynnykh zalyshkiv hrubosteblovykh kulʹtur v mizhryaddyakh. Zb. nauk. pratsʹ Podilʹsʹkoho derzhavnoho ahrarno-tekhnolohichnoho universytetu. Kamʺyanetsʹ-Podilʹsʹkyy. (17), 450-458. [in Ukrainian].
 Zayika, P.M. (2001). Teoriya silʹsʹkohospodarsʹkykh mashyn. Mashyny ta znaryaddya dlya obrobitku gruntu (Vol. 1). Kharkiv : Oko. [in Ukrainian].
 Yarotsʹkyy, V. A. (1991). Enerhovytraty na podolannya syl tertya pry riznykh rezhymakh roboty dyskovoho nozha. Pratsʹ UkrNDI mekhanizatsiyi ta elektryfikatsiyi sil. hosp-va. (73), 11-14. [in Ukrainian].
 Sereda, L. P., Kuzʹmenko, V. F., Kholodyuk, O. V. (2013). Vyznachennya koefitsiyenta tertya rukhu masy lyutserny po metaleviy poverkhni. Zb. nauk. stat. Lutsʹk. NTU. (24), 178-186. [in Ukrainian].
131 - Applied Mechanics
132 - Materials Science
133 - Industry engineering
141 - Power engineering, electrical engineering and electromechanics
208 - Agricultural engineering
The magazine "Engineering, Energy, Transport AIC" is included in the list of scientific professional editions of Ukraine on technical sciences
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Certificate of state registration of mass media: No. 21906-11806 P dated 03/12/2016.
Founder of the journal: Vinnytsia National Agrarian University
Editor-in-chief: Tokarchuk Olexiy A.
Ph.D., Assoc., VNAU (Vinnytsia)
Deputy Editor-in-Chief: Veselovska Nataliia R.
Doctor of Technical Sciences, Full Prof., VNAU (Vinnytsia)
Executive Secretary: Polevoda Yuri A.
Ph.D., Assoc., VNAU (Vinnytsia)
Members of the Editorial Board:
Tokarchuk O.A. - Ph.D., Associate Professor, Vinnytsia National Agrarian University
Veselovska N.R. - Doctor of Technical Sciences, Full Professor, Vinnytsia National Agrarian University
Bulgakov V.M. - Doctor of Technical Sciences, Full Professor, Acad. NAAS, National University of Life and Environmental Sciences of Ukraine
Iskovich-Lototsky R.D. - Doctor of Technical Sciences, Full Professor, Vinnytsia National Technical University
Bandura V. N. - Ph.D., Full professor, Vinnytsia National Agrarian University
Polevoda Yu.A. - Ph.D., Associate Professor, Vinnytsia National Agrarian University
Tsurkan A.V. - Ph.D., Associate Professor, Vinnytsia National Agrarian University
Ivanchuk Y.V. - Ph.D., Associate Professor, Vinnytsia National Technical University
Jordan Todorov Maximov - Doctor of Technical Sciences, Full Professor, Technical University of Gabrovo (Bulgaria)
Type of publication: journal
Kind of publication: scientific
Publication status: domestic
Year of foundation: 1997
Periodicity: 4 times per year
Volume: 18-20 conv. print. sheet (А4)
ISSN: 2520-6168 (print version), (online version)
Language of publication: (mixed languages) Ukrainian, Russian, English
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The periodical edition is included to the List of scientific professional publications of Ukraine on technical sciences, approved by order of the Ministry of Education and Science of Ukraine in 05.16.2016, No. 515.
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It was founded in 1997 under the title "Bulletin of the Vinnitsa State Agricultural Institute." According to the Decree of the Presidium of the Higher Attestation Commission of Ukraine of September 11, 1997, this publication received the status of a professional in which it is allowed to publish the main results of dissertation researches.
In 2001-2014 the journal published under the title “Collection of scientific works of Vinnytsia National Agrarian University. Series: Technical Sciences "(Certificate of State Registration of Mass Media KV No. 16644-5116 PR of 04/30/2010).
Since 2015 journal has title "Engineering, Energy, Transport AIC" (Certificate of State Registration of Mass Media No. 21906-11806 P dated 03/12/2016).