Engineering, Energy, Transport AIC

Dmytro Makarenko – Candidate of Technical Sciences, Associate Professor, head of the department of of the department of machine and tractor park operation of Dnipro State Agrarian and Economic University (St. S. Efremova, 25, Dnipro, Ukraine, 49000, e-mail: makarenko.d.o@dsau.dp.ua, https://orcid.org/0000-0002-3166-6249).

Oleksii Derkach – Candidate of Technical Sciences, Associate Professor of the department of machine and tractor park operation of Dnipro State Agrarian and Economic University (St. S. Efremova, 25, Dnipro, Ukraine, 49000, e-mail: addsau@gmail.com, https://orcid.org/0000-0002-5537-8022).

Volodymyr Govorukha – Doctor of Physical and Mathematical Sciences, Professor, Head of the department of higher mathematics, physics and general engineering disciplines of Dnipro State Agrarian and Economic University (St. S. Efremova, 25, Dnipro, Ukraine, 49000, e-mail: govorukhavb@yahoo.com, https://orcid.org/0000-0002-0936-9272).

Nataliia Veselovska – Doctor of Technical Sciences, Professor, Head of the Department of Machines and Equipment of Agricultural Production of Vinnitsa National Agrarian University (3 Soniachna St., Vinnytsia, Ukraine, 21008, e-mail: wnatalia@ukr.net, https://orcid.org/0000-0001-9399-6721).

The efficiency of planting seeds and, therefore, the yield of agricultural crops depend significantly on the characteristics of the mechanisms of copying sowing sections. These mechanisms can be conditionally divided into two categories: radial and parallelogram. Radial mechanisms with leashes are used in traditional technologies and require high-quality preliminary processing, and radial mechanisms with pressure rods are suitable for any agrophones
The durability of the movable joints of the parallelogram copying mechanism of the sowing complex depends on their resistance to wear. This stability is determined by the mode of operation, chemical composition and structure of the surface layer of parts, as well as physical-mechanical and tribotechnical characteristics.
With an average seasonal task for Agro-Soyuz Turbosem II 19-60 sowing complexes within 3–4 thousand hectares, the total service life of experimental parts is at least 4 years, which is at least four times more than in the case of serial parts.
The positive effect of the absence (or the presence within the measurement error) of wear of steel parts of movable joints that work in connection with polymer composite material (PCM) was revealed. The average resource of experimental parts in the hinges of the parallelogram copying mechanism for Agro-Soyuz Turbosem II 19-60 seeding complexes is 20589 ha. The average value of the wear of the experimental parts was determined to be 1.78 mm, and the intensity of their wear was 1.02×10-4 mm/ha. It was established that the wear of UPA-6-30 PCM parts in the moving joints of the copying mechanism occurs according to the normal distribution law ( = 0.108), which allows very accurate prediction of their resource. The consistency of the experimental distribution with the theoretical distribution was checked using the Kolmogorov criterion. It is confirmed that the distribution takes place according to the normal law. An analysis of reliability indicators during shortened tests was also carried out and the probability of failure-free operation of experimental parts made of polymer-composite material was determined. According to the results of field tests of the elements of the movable joints of the mechanism of copying the sowing complex, it was established that the resource value of 20,558 hectares exceeds the indicators of serial parts by 4 times.

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