FEATURES OF THE STAND AND METHODS FOR EXPERIMENTAL STUDIES OF PUMP-DOSING PUMPS OF HYDRAULIC STEERING SYSTEMS OF SELF-PROPELLED VEHICLES UNDER THE ASSOCIATED LOAD
Motorna Oksana – PhD, senior teacher of the Department of “Agricultural machinery and equipment” of the Vinnytsia National Agrarian University (3 Solnechnaya St, Vinnytsia, 21008, Ukraine, e-mail: email@example.com).
The article discusses a special stand for experimental research of dosing pumps of hydrostatic steering systems of self-propelled machines, which makes it possible to analyze the quality of the dosing pump under conditions that correspond to different control actions and loads that arise during the operation of the steering system. An electro-hydraulic scheme of the stand has been developed to determine the characteristics of a dosing pump under the action of a associated load. The characteristics of control and measuring devices for determining parameters that are controlled both in statics and in dynamics are presented. To record changes in signals over time, a recording system has been developed that realizes the recording of signals on a computer and their processing using the «PowerGraph» program.
A feature of this stand is that the load for the dosing pump is formed in the form of a pressure drop in its outlet channels. This makes it possible to evaluate the performance of these products regardless of their working volume and facilitates the experimental study of the behavior of the system when reproducing certain modes of its operation over a period of time that is not limited to the stroke of the executive hydraulic cylinder of the steering system.
The stand implements an original technique for reproducing the associated load in the outgoing channels of the dosing pump, for which an additional pump driven by a hydraulic motor is installed in the outgoing channels of the metering pump. Regulation of the speed of rotation of the drive motor makes it possible to set the required value of the associated load.
The method for determining the quality indicator of the dosing pump operation under the action of a associated load is briefly described In this case, the indicator of relative flow rates in the outgoing channels of the metering pump is determined, which shows how many times the actual flow rate of the working fluid increases in comparison with the nominal one, which is determined for the dosing pump with a certain working volume by the speed of rotation of the input shaft.
 Pohorilets, O.M., & Volianskyi, M.S. (Ed.). (2004). Hidropryvid silskohospodarskoi tekhniky [Hydraulic drive of agricultural machinery]. Kyiv: Vysha osvita [in Ukranian].
 Hidravlichnyi rulovyi mekhanizm transportnoho zasobu [Hydraulic steering mechanism of the vehicle]: pat. 86521 Ukraina, MPK (3012.01) В62D 5/00. № u 2013 01264; zaiavl. 04.02.2013; opubl. 10.01.2014, Biul. № 1.
 Motorna, O.O., Ivanov, M.I., Kozak, Yu.M., Pereiaslavskyi, O.M. (2016). Vybir parametriv nasosa-dozatora dlia systemy hidroobiemnoho rulovoho keruvannia samokhidnykh mashyn na osnovi bahatokriterialnoi optymizatsii [Selection of dosing pump parameters for the system of hydrovolume steering of self-propelled machines on the basis of multicriteria optimization]. Promyslova hidravlika I pnevmatyka - Industrial hydraulics and pneumatics, 1, 65–76 [in Ukranian].
 Pogorelyi, L.V., & Anilovich, V.Ya. (2004). Ispytaniia selskokhoziaistvennoi tekhniki: nauchno-metodologicheskie osnovy otsenki i prognozirovaniia nadezhnosti selskokhoziaistvennykh mashin [Tests of agricultural machinery: scientific and methodological bases for assessing and forecasting the reliability of agricultural machines]. Kyiv: Feniks [in Russian].
 Armashov, Yu.V. (2002). Vyprobuvannia salckohocpodarskoi tekhniky na nadiinist [Testing of agricultural machinery for reliability]. Dnipropetrovsk: Okhmat P.K. [in Ukranian].
 Ivanov, M.I., Motorna, O.O., Kozak, Yu.M., Pereiaslavskyi, O.M. (2016) Stend ta metodyka eksperymentalnykh doslidzhen nasosiv-dozatoriv system hidroobiemnoho rulovoho keruvannia samokhidnykh mashyn pty dii zustrichnoho navantazhennia [The stand and a technique of experimental researches of dosing pumps of systems of hydrovolume steering of self-propelled cars at action of counter loading] Promyslova hidravlika I pnevmatyka - Industrial hydraulics and pneumatics, 3, 66–74 [in Ukranian].
 Ivanov, M.I., Sharhorodskyi, S.A. (2002) Vplyv poputnoho navantazhennia na robotu systemy hidroobiemnoho rulovoho keruvannia mobilnykh mashyn [Influence of the associated load on the operation of the hydrovolume steering systems of mobile machines]. Zbirnyk naukovykh prats Vinnytskoho derzhavnoho ahrarnoho universytetu - Collection of scientific works of Vinnytsia State Agrarian University, 11, 204–210 [in Ukranian].
 Obidin, V.Ya., Smoliakov, A.I., Ivanov, A.V. (1988) Stend dlia issledovaniia gidrorulei mobilnykh mashin [Stand for research of hydraulic steering wheels of mobile machines] Stroitelnye I dorozhnye mashiny - Construction and road machines, 9, 26-26 [in Russian]
 A.s. 1280376 SSSR, MKI G 01 M 17/06. Stend dlia ispytanii rulevykh mekhanizmov transportnykh sredstv [Test bench for steering mechanisms of vehicles] № 3937388/31-11; zaiavl. 06.08.85; opubl. 30.12.86, Biul. № 48.
 Motorna, O.O. (2015). Vybir pokaznykiv yakosti dlia vsebichnoi otsinky funktsionuvannia hidroobiemni systemy rulovoho keruvannia samokhidnykh silskohospodarskykh mashyn [Selection of quality indicators for a comprehensive assessment of the operation of the hydrovolume steering system of self-propelled agricultural machines] Promyslova hidravlika I pnevmatyka - Industrial hydraulics and pneumatics, 2, 71–75 [in Ukranian].
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)
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.
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).