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Engineering, Energy, Transport AIC

space SCIENTIFIC JOURNALS OF VINNITSA NATIONAL AGRARIAN UNIVERSITY

Issue №: 3(110)

Published: 2020.10.30
DOI: 10.37128/2520-6168-2020-3


Description:
Тематика журналу: 131 - Прикладна механіка, 132 - Матеріалознавство, 133 - Галузеве машинобудування, 141 - Електроенергетика, електротехніка та електромеханіка, 208 - Агроінженерія.

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DETERMINATION OF THE MAIN PARAMETERS OF THE ROTARY MOWER CUTTING APPARATUS

DOI: 10.37128/2520-6168-2020-3-8
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Dmitry Kondratyuk -  PhD, Associate Professor of the Department of Agroengineering and Technical Services of the Vinnytsia National Agrarian University (3, Solnyshchaya St., Vinnitsa, Ukraine, 21008).
Vitaliy Komaha - Candidate of Technical Sciences, Senior Lecturer of the Department of Agroengineering and Technical Services of the Vinnytsia National Agrarian University (3, Solnyshchaya St., Vinnitsa, Ukraine, 21008, e-mail: komacha@vsau.vin.ua).

Annotation

For mowing grass during harvesting of hay or haylage, support-free mowers with rotary movement of knives are used mainly, the productivity of which is much greater than segment-finger mowers. Free-cutting cutting apparatuses with rotational movement of knives happen with their rotation around the vertical (rotary) and horizontal (rotary) axes. Mowers that are equipped with rotary cutting devices significantly grind grass, so they are used in mower-grinders and lawn mowers. The purpose of the work is to substantiate the methodology for calculating the structural and kinematic parameters of rotary cutting devices, corresponding to the conditions of their use. The main parameters characterizing the operation of rotary cutting devices are: area, mows than in one revolution of the disk; knife working length; overlapping knives of adjacent rotors; cutting speed.
In determining the basic parameters of the rotary cutting apparatus of the mower, the following assumptions were made. It was believed that the angular speed of the rotor and the translational speed of the mower are unchanged, and the movement of the unit is straightforward. In addition, the cutting apparatus performs mowing in a plane parallel to the soil surface, that is, in a plane perpendicular to most plant stems. It is shown that the absolute speed of any point of the knife varies from the maximum value equal to the sum of the peripheral speed of this point and the aggregation speed of the mower, to the minimum - the difference of the above speeds. It was found that the working length of the cutting edge of the knife is directly proportional to the speed of aggregation of the mower and inversely proportional to the angular velocity of the rotor and the number of knives mounted on it. The overlap of the path of the knives of adjacent rotors depends on the radius of the rotor; the number of knives mounted on it and the kinematic mode of operation of the cutting apparatus. Moreover, an increase in the radius of the rotor requires an increase in overlap, and an increase in the kinematic mode and the number of knives leads to a decrease in the overlap between the paths of the knives. The resulting dependence, which allows you to determine the area, mows than in one revolution of the rotor.

Keywords: rotary mower, rotor, knife, cutting area, overlapping, cutting speed

List of references

 

[1]    Morozov, I. A., Kornilovich, R. A. (2005). Klassifikatsiya rabochih organov rotatsionnyih kosilok. Sbornik nauchnyih trudov molodyih uchenyih Ryazanskoy GSHA, p. 173–174. [in Russian].
[2]    Rubtsov, G. M. (1965). Issledovanie protsessa rezaniya stebley izmelchitelem rotornogo tipa. Dokladyi MIISP. Tehnicheskaya mehanika. Moskva, p. 135–142. [in Russian].
[3]    Kornilovich, R. A. (2007). Sovershenstvovanie rezhuschego apparata rotatsionnoy kosilki [Improving the cutting apparatus of a rotary mower] (Candidate’s thesis). Ryazanskaya gosudarstvennaya selskohozyaystvennaya akademiya imeni professora P. A. Kostyicheva. Ryazan. [in Russian].
[4]    Reznik, N. E. (1975). Teoriya rezaniya lezviem i osnovyi rascheta rezhuschih apparatov. Moskva : Mashinostroenie. [in Russian].
[5]    Karpenko, M. I. (1984).Obosnovanie optimalnyih tehnologicheskih parametrov rotatsionnogo rezhuschego apparata kosilok s ponizhennoy skorostyu nozhey [Justification of the optimal technological parameters of the rotary cutting apparatus of mowers with reduced knife speed] (Extended abstract of Candidate’s thesis). Glevaha. [in Russian].
[6]    Mc Randal, D. M., Mc Nalty, P. B. (1980). Mechanical and physical properties of grasses. Trans. Asae, 4, 816. [in English].
[7]    Mc Randal, D. M.,  Mc Nalty, P. B. (1978). Elpact cutting behavior of forage crops.  Journal  of Agricultural Engineering Research, 3, 313–338. [in English].
[8]    O'Dogherty, M. I. (1982). A review of research on forage chopping. Journal of Agricultural Engineering Research, 27. 268–289. [in English].
[9]    Kaifash Ferents (1982). Obosnovanie dinamicheskih parametrov i rezhima rabotyi rotatsionnogo rezhuschego apparata [Justification of the dynamic parameters and operating mode of the rotary cutting apparatus] (Extended abstract of Candidate’s thesis). Moskva. [in Russian].
[10]    Ovchinnikov, Ya. L., Kuyanov, I. A. (2009). K voprosu sovershenstvovaniya rabotyi rotatsionnogo rezhuschego aparata. Polzunovskiy almanah, 3(2), 260–263. [in Russian].
[11]    Bronshteyn, I. K., Semedyaev, K. A. (1981). Spravochnik po matematike dlya inzhenerov i uchaschihsya vuzov. Moskva : Nauka. [in Russian].
[12]    Smirnov, G. A. (1989). Issledovanie tsikloidnyih krivyih pri analize rabotyi rotatsionnyih rabochih organov. Sbornik nauchnyih trudov VIM, Vol. 119, 19–25. [in Russian].
[13]    Osobov, V. I., Vasilev, G. K. (1983). Senouborochnyie mashinyi i kompleksyi. Moskva: Mashinostroenie. [in Russian].

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About journal

Topics of the journal:

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

(Category "Б", Order of the Ministry of Education and Science of Ukraine dated 02.07.2020 №886)

 

Key information:
ISSN (print): 2520-6168
DOI: 10.37128/2520-6168

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

The sphere of distribution and category of readers: national, foreign, faculty, scientists, entrepreneurs.

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.

The journal "Engineering, Energy, Transport AIC" is included in the "Catalog of Ukrainian Publications".

Subscription to the journal can be issued in each post office. The subscription index is 99720.

History of journal:

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).