Issue №4, Vol. 22Derepasko I., Popikov P., Polukarov D., Chernykh A., Manukovsky A., Abramov V., Savchenko S. Title of the Paper Modeling of working processes of a chokerless skidding unit with a hydraulic drive for energy recovery // Resources and Technology. 2025. №4, Vol. 22. P. 36‒56.
DOI: 10.15393/j2.art.2025.9043
Title of the Paper Modeling of working processes of a chokerless skidding unit with a hydraulic drive for energy recovery
Derepasko
Ivan Viktorovich | G.F. Morozov Voronezh State Forestry University, derepaskoiv@mail.ru |
Popikov
Petr Ivanovich | G.F. Morozov Voronezh State Forestry University, popikovpetr@yandex.ru |
Polukarov
Denis Anatolyevich | G.F. Morozov Voronezh State Forestry University, aviatortut@mail.ru |
Chernykh
Alexander Sergeevich | G.F. Morozov Voronezh State Forestry University, as-umu@mail.ru |
Manukovsky
Andrey Yurievich | G.F. Morozov Voronezh State Forestry University, mayu1964@mail.ru |
Abramov
Vitaly Viktorovich | G.F. Morozov Voronezh State Forestry University, vitali1980a@ yandex.ru |
Savchenko
Stanislav Igorevich | G.F. Morozov Voronezh State Forestry University, savchenko.stas2020@yandex.ru |
Key words:
forest skidding; thinning; skidding grab; logs; modeling; compliance factor; recovery hydraulic cylinder |
Summary: The article analyzes the studies of the hydraulic drive dynamics of process equipment. Analysis of research aimed at increasing the energy efficiency of the hydraulic drive of forestry machines showed lack of such studies concerning chokerless skidding units. Also the use of hydraulic accumulators in the design of lifting mechanisms for energy recovery has not been studied thoroughly enough. The analysis also helped to determine the methods of mathematical modeling of the proposed device dynamics. The purpose of this work was to increase the energy efficiency of a chokerless skidding unit by substantiating the parameters of a hydraulic drive with energy recovery. The solution to the mathematical model of the working process of a chokerless skidding unit was obtained by constructing a cyclic algorithm in the Excel software product. This program allowed the authors to construct the dependencies of the functions of vertical movement, the angle of inclination of the unit and the pressure of the liquid in the recovery system based on the calculations performed. To check the adequacy of the mathematical model of the working processes of the energy-saving hydraulic drive of the skidding grapple for aggregation with the MTZ-82 tractor, preliminary laboratory tests were performed and experimental dependencies of the working fluid pressure in the recuperation hydraulic drive similar to the theoretical ones were obtained. With a stump density of 200 pcs/km in the felling area, 60 collisions of the skidding bundle of assortments may occur with an average skidding distance of 300 m. Therefore, energy savings with a skidding bundle weight of 600 kg and an amplitude of unit oscillations of 0.2 m can be 48 kJ per skidding cycle, i. e. the reduction in energy costs reached 10 %. A comparative analysis of the performance of the skidding unit, before and after changing its structure, showed that the volume of wood falling out of the capture per hour of operation of MTZ-82 + PTN-0.8 was 0.933 m3. The implementation of the proposed solutions resulted in an increase by 17% in hourly (from 3.47 to 4.2 m3) and shift productivity (from 22.27 to 26.9 m3) at a skidding distance of 270 m.
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