Engineering, Energy, Transport AIC

Serhiy Shargorodskiy – Ph.D., Associate Professor of the Department "Machinery and Equipment of Agricultural Production" of the Vinnytsia National Agrarian University (3, Solnychna str., Vinnytsia, Ukraine, 21008, e-mail: sergey20@vsau.vin.ua, https://orcid.org/0000-0003-2125-773X).
Volodymyr Rutkevych – Ph.D., Associate Professor of the Department of Machinery and Equipment for Agricultural Production of Vinnytsia National Agrarian University  (Sonyachna Str., 3, Vinnytsia, Ukraine, 21008, e-mail: v_rut@ukr.net, https://orcid.org/0000-0002-6366-7772).
Evhenyy Yaschcuk  – post-graduate student of the Department "Machinery and Equipment of Agricultural Production" of Vinnytsia National Agrarian University (3 Sonyachna Street, Vinnytsia, 21008, Ukraine, e-mail: zenaasuk@gmail.com, https://orcid.org/0000-0002-6912-4058).

The publication discusses the issues of mathematical modeling of dynamic processes occurring in a complex hydromechanical system of the hydraulic drive of the wide-cut cultivator sections with consistent wear of the hydraulic cylinders. The analysis of known designs of wide-cutting tools and agricultural units is carried out. It is noted that one of the tendencies in the development of domestic agricultural engineering is an increase in the width of coverage of tillage machines. In this regard, hydraulic drives for decomposition and assembly of sections of these machines are widely used. The use of this type of drive is due to its compactness, speed and power. The basic schematic diagrams of hydraulic drives for decomposition of wide-cut tillage machines are considered. On the basis of the analysis, a schematic diagram of the hydraulic drive for assembling (decomposing) sections of a wide-grip cultivator with sequential actuation of hydraulic cylinders is proposed and the principle of its operation is described. A mathematical model has been developed for the hydraulic drive of the wide-grip cultivator sections in the working and transport position. The mathematical model consists of the equations of the continuity of the flows of the working fluid, which describe the processes occurring in the hydraulic drive, and the equations of moments and forces, from which it is possible to determine the force factors acting on the elements of the system. It is difficult to obtain an analytical solution to the resulting system of equations, therefore, to find solutions, numerous methods were applied, namely the Runge-Kutta-Feldberg method with an automatic change in the integration step. On the basis of the obtained dependencies, an analysis of the operation of the hydraulic drive with sequential wear of the hydraulic cylinders was carried out and recommendations were proposed on the design device and directions for improving the hydraulic drive of the tillage unit sections.

[1]    Ratushna, N., Mahmudov, I., Kokhno A. (2007). Metodychni pidkhody do stvorennia novoi silskokhospodarskoi tekhniky u vidpovidnosti z vymohamy rynku naukoiemnoi produktsii. MOTROL. 9А. 119–123. [in Ukrainian].
[2]    Lupеnkа, Yu. О., Меsеl-Vеsеliakа, V.Ya. (2012). Strаtеhіchni nаpriamy rоzvytku sіlskоhо hоspоdаrstvа Ukrаiny nа pеrіоd dо 2020 rоku. K. : NNTS “ІАЕ”. [in Ukrainian].
[3]    Smіrnоv, А. (2011). Kultyvаtоry. Аhrоbіznеs sоhоdnі. 8(207). 18–22. [in Ukrainian].
[4]    Yasеnеtskyi, V.А., Shustіk, L.P. (2005). Vіtchyznяianі kultyvаtоrи. Prоpоzиtsіia. 12. 25–33. [in Ukrainian].
[5]    DSТU 2189-93. (1994). Systеmа stаndаrtіv bеzpеky prаtsі. Маshyny sіlskоhоspоdаrskі nаvіsnі tа prychіpnі. Zаhаlni vymоhy bеzpеky. Nаdаnо chynnоstі 1994–01–01. K.:Dеrzhpоzhyvstаndаrt Ukrainy. [in Ukrainian].
[6]    Ivanov, M.I., Rutkevich, V.S., Pоhrеbnyi, L.P. (2015). Pat. 101966 Ukraina, MPK (2015.01) А01В 39/12/ Hidravlichnyi pryvod skladаnnia sеktsіi shyrоkоzаkhvаtnоhо kultivаtоrа ; zaiavnyk ta patentovlasnyk Vinnitskii natsionalnyi agrarnyi universitet № u 2015 03351; zaiavl. 10.04.15; opubl. 12.10.2015, Byul. № 19. 5 s. [in Ukrainian].
[7]    Drive and Control Systems for Combine Harvesters and Forage Harvesters. (2001). Bosch Rexroth AG. RE 98071. [in English].
[8]    Ivanov, N., Sharhorodskyi, S., Rutkevych, V. (2013). Matematicheskaia model hidroprivoda blochno-portsionoho otdelitelia konservirovannykh kormov. MOTROL. 5. 83–91. [in Russians].
[9]    Paсstуushеnkо, S.I. (2002). Pytаnnia оptymіzаtsіi tеkhnіchnykh systеm. Zbіrnyk nаukоvykh prаts NАU “Mеkhаnіzаtsіia sіlskоhоspоdаrskоhо vyrоbnytstvа”. Кyiv: Vydаvnytstvо NАU. Т.XI. 266–271. [in Ukrainian].
[10]    Ivanov, M.I., Shаrhоrоdskyi, S.А., Rutkevych, V.S. (2013). Pіdvyshchеnnia еkspluаtаtsіinоi еfеktyvnоstі blоchnо-pоrtsіinоhо vyvаntаzhuvаchа kоnsеrvоvаnych kоrmіv shliakhоm hіdrоfіkаtsіi pryvоdа rоbоchиkh оrhаnіv [Improving the operational efficiency of the block-batch unloader of canned fodder by hydration of the drive of working bodies.]. Prоmyslоvа hіdrаvlіkа і pnеvmаtykа – Industrial hydraulics and pneumatics. 1(39). 91–96 [in Ukrainian].