DETERMINATION OF THE SWITCHING ON MOMENT OF THE ACTIVE WHEELS OF A TECHNOLOGICAL MACHINE FROM THE POSITION OF ENERGY CONSERVATION
Abstract
The article considers the problems of increasing the efficiency of transport and technological units by more fully using the power of their engines. When a module with a variable mass (hopper, trailer-loader, container, etc.) is included in the composition of the combined unit, it is not possible to achieve a constant level of loading of the tractor engine, since at the beginning and end of the technological operation the mass of the load will be different, therefore one of the interesting ways to solve this problem is to use active drive wheels of the technological machine (trailer). Given that for a transport and technological unit, the use of active wheels of a technological machine (trailer) is effective only for part of the working time, it is advisable to determine the boundary conditions for connecting (disconnecting) active wheels from the standpoint of energy saving. The determining parameter for connecting active wheels can be the slippage of the tractor propellers, but during operation the transport and technological unit is subjected to significant dynamic influences, therefore, when determining the slippage coefficient and its limit values, it is advisable to take into account the dynamic component. The dependences of the change in the slippage of an all-wheel drive tractor when changing the vertical dynamic loads of its axles at different speeds of movement have been determined. It has been found that when the unit is accelerated, the intensity of the increase in the dynamic loads of the rear axle is greater than that of the front; and slippage is vice versa. With fluctuations in longitudinal forces, which are caused by fluctuations in engine torque and resistance of the technological machine (agricultural implement), within P P kT kT , the slip coefficient will change proportionally and have a maximum δmax and minimum δmin value. At the same time, the increase in the slip coefficient at P const kT is not constant, since it depends on the frequency of oscillation of the force influences that form the frequency characteristics of the oscillation of the corresponding force. Since it was found that the dynamic slip coefficient will be greater than the tractor slip coefficient when working with a constant force on the hook, when determining the moment of switching on the active wheels, it is necessary to base it on the δdyn.
References
2. Antoshchenkov R.V., Antoshchenkov V.M., Karshin D.V. (2015): Analiz eksperymentalnykh doslidzhen dynamiky buksuvannia rushiiv husenychnykh ta kolisnykh traktoriv.[ Analysis of experimental studies of the dynamics of skidding of crawler and wheeled tractor engines]. Pr. Tavr. derzh. ahrotekhnol. un-tu. Vol. 15 (3), P. 80–85. (in Ukrainian) .
3. Chaplinskyi Andrii, Nadykto Volodymyr (2024): Research of the plowing quality with a unit based on a modular traction-transportation vehicle. E3S Web of Conf. 508, 08002. https://doi.org/10.1051/e3sconf/202450808002.
4. Kalinin Ye.I., Shuliak M.L., Maltsev V.P (2016): Vplyv nestatsionarnosti hakovoho navantazhennia na buksuvannia rushiiv kolisnoho traktora. [The influence of hook load unsteadiness on the slippage of wheeled tractor drives]. Systemy obrobky informatsii. Kharkov: KhUPS. Vol. 5(142), P. 27–30. (in Ukrainian) .
5. Kalinin Ye.I., Shuliak M.L., Poliashenko S.O. (2016): Doslidzhennia horyzontalno-poperechnykh kolyvan napivprychepu. [Research on horizontal-transverse vibrations of a semi-trailer].Visnyk KhNTUSH im. P. Vasylenka. Vol. 169, P. 155–161. (in Ukrainian) .
6. Kalinin, Ye. (2020): Analiz dynamiky transportno-tekhnolohichnykh ahrehativ yak system zminnoi masy. [Analysis of the dynamics of transport and technological units as variable mass systems]. Inzheneriia pryrodokorystuvannia (2(12), P. 38-43. http://journal.khntusg.com.ua/index.php/enm/article/view/155 (in Ukrainian) .
7. Karelina Mariya, Rakov Vyacheslav, Ershov Vladimir, Klimenko Viktor (2021): A hybrid drive system for off-roaders with a powered trailer to be used in the Arctic Region, Transportation Research Procedia, 57, 285-290. https://doi.org/10.1016/j.trpro.2021.09.053.
8. Lebedev S. (2016): Pidvyshchennia ahroekolohichnykh yakostei silskohospodarskykh kolisnykh traktoriv. [Improving the agroecological qualities of agricultural wheeled tractors]. Tekhnika i tekhnolohii APK. Vol. 1, P. 16–21. (in Ukrainian) .
9. Nadykto V. (2016): Vyznachennia maksymalnoho buksuvannia kolisnykh rushiiv z urakhuvanniam obmezhennia yikh tysku na grunt. [Determination of maximum slippage of wheeled drives taking into account the limitation of their pressure on the ground]. Tekhnika i tekhnolohii APK. Vol. 10, P. 34–38. (in Ukrainian) .
10. Shuliak, M. L., Lebedev, A. T., Raputa, V. V., & Murchych, M. M. (2024): Enerhozberezhennia transportnotekhnolohichnykh ahrehativ zminnoi masy pry vykonanni tekhnolohichnykh operatsii roslynnytstva. [Energy saving of transport-technological units of variable mass when performing technological operations in crop production]. Visnyk Sumskoho natsionalnoho ahrarnoho universytetu. Seriia: Mekhanizatsiia ta avtomatyzatsiia vyrobnychykh protsesiv, № 4 (58), 81-88. https://doi.org/10.32782/msnau.2024.4.12 (in Ukrainian) .
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