TEKA
Komisji Motoryzacji i Energetyki Rolnictwa XVII_2/2017.
Commission of Motorization and Power Industry in Agriculture

Strona redakcyjna - editorial page - plik PDF

List of the Reviewers - editorial page - plik PDF

Spis treści - plik PDF

Roman Kuzminskyj, Stepan Miahkota, Ruslan Barabash
Department of Mechanics and Energetics, Lviv National Agrarian University,
St. Volodymyr the Great 1, 80381 Dubliany, Ukraine
e-mail: rkuzminsky@gmail.com

Organizational and technological compatibility of the technological processes of three different types of third line maintenance of KhTZ-3522 tractors in the joint technological flow - pełny artykuł (full article) - plik PDF

Summary. The work is dedicated to systematic sub-stantiation of capacity, production structure and specialization of service station (SS) of KhTZ-3522 tractors. Based on the technical and economic comparati-ve analysis of the results of modeling of the technological processes (TPs) of the third line maintenance, the third line maintenance before current repair (BCR) and the third line maintenance before major repair (BMR) of KhTZ-3522 tractors, the parametrical series of production structures of service stations (SSs) both mono- and poly technological specialization, which can work effectively in a wide range of the general annual program of orders, and in the conditions of seasonal fluctuations of orders for the maintenance of these tractors, are founded. The results of calculations of the system of indicators of organizational and technological compatibility (OTC) of the TPs of the third line maintenance, the third line maintenance BCR and the third line maintenance BMR of KhTZ-3522 tractors in the joint technological flow are presented. The dependencies of these indicators on the total annual program of orders for SSs of different productivity are analyzed. According to the results of the analysis, the poly technological specialization of such service stations is substantiated.
Key words: KhTZ-3522 tractors, maintenance, technological processes, organizational and technological compatibility, service stations, specialization



M. Piven
Kharkiv Petro Vasylenko National Technical University of Agricultural, Ukraine, e-mail: info@khntusg.com.ua

Numerical solution of the problem of spatial movement of a loose mixture in a vibrolot - pełny artykuł (full article) - plik PDF

Summary. A computational solution of the spatial motion problem of a loose mixture in a vibrating tray by finite-difference method is obtained in the article. The essence of the method consists in the fact that the differential operators regarding the spatial variables are replaced by finite-difference operators in the mesh points. In that time, the finite-difference operator is to be approximate the differential one as accurately as it possible. Finite-difference operators with the second order of accuracy are used. Boundary conditions introduce changes in the coefficients of difference operators. We assume that these changes are already have been taken into account in the equations which correspond a system of ordinary differential equations relative to the vector variable. The dominant terms of the dynamics equations reckon in the summands of equations. They affect the convergence speed of the approximate solutions to the exact one. To the right-hand members the terms, which contain mixed derivatives, are reckon in. In this form, the equations are prepared for the application of the difference splitting method. In order to obtain a stationary solution of the problem, the following points are used: the presence of dissipation in the problem (forces of internal and external friction) leads to the fact that under constant external conditions (the boundary conditions do not depend on time), the flow of the loose mixture stabilizes with time and irrespective of the initial conditions reach its stationary state. Therefore, the initial-boundary-value problem with invariable boundary conditions is formulated further. And the stationary solution is considered as asymptotic. The multidimensionality of the problem leads to the need to solve systems containing a large number of equations. In addition, when solving the latter, numerical instability of the algorithm may arise is possible. One way of solving the equations is to move from differential equations to a system of algebraic equations by replacing the time-differentiation operator with finite difference. In the following, an implicit difference scheme corresponding to the Crank-Nicholson method with a double step in time, with a second order of accuracy, both in time and in spatial variables, is applied..
Key words: spatial motion, bulk mixture, finite-difference method, differential operators.


V. Didukh, R. Kirchuk, U. Onyuh
Lutsk National Technical University, Ukraine, e-mail: didukh_v@ukr.net

Study of the potential use of oil flax stems - pełny artykuł (full article) - plik PDF

Summary. The article demonstrates the results of research on determining the potential of oil flax stem which allows to set realistic directions for its use for manufacture of short polidisposed fiber or fuel briquettes For high-quality processing of the stem, which remains standing, it is worthwhile applying the North –European technology of stem transformation into the treated plant fibers. Analysis of manufacturing technology of fuel pellets, briquettes indicates that the quality of their formation depends on the grinding, the initial moisture content. The stems of oil flax by calorific capacity do not differ from the most agricultural materials and produce 16 ... 18 MJ / kg. So, it is possible to receive short polidisposed fiber, in case of optimal weather conditions, or use the treated plant fiber as the raw material in production of materials for construction, fuel briquettes, which is the burning issue for the Western Polissya. The analysis shows that in order to reduce dependence on traditional energy sources , it is necessary to increase production of fuel briquettes. However the potential of organic part of crops is not used at maximum. The advantage is the relatively short cycle of funds necessary for oil flax cultivation technologies - from planting to harvesting and processing.
Key words: stems of flax, seeds, briquettes, technology.


Alexander Bondarenko, Peter Yeliseev, Marina Loriya, Aleksey Tselish?hev
Volodymyr Dahl East Ukrainian National University; e-mail:pyrodetector@gmail.com

Mathematical and simulation modeling of thermal processes in pyroelectric detectors - pełny artykuł (full article) - plik PDF

Summary. This paper considers mathematical and simulation models of a typical pyroelectric detector It explains the importance of the rate of temperature change of the sensitive element in current mode.
Key words: Pyroelectric detector, mathematical modeling, simulation modeling, temperature change, rate of temperature change.



Dmytro Marchenko, Andrii Zhydkov
East Ukrainian Volodymyr Dahl National University
V. Dahl EUNU pr. Central 59-? Sievierodonetsk, 93400, Ukraine, e-mail: zhand.cmw@ukr.net

Model of operation of technical objects taking into account the defect state of their individual elements - pełny artykuł (full article) - plik PDF

Summary. The article describes a model for the synthesis of maintenance strategies for technical facilities to minimize the risks of failures. The model is constructed taking into account the nature of the distribution of the probability of failure of individual elements of the technical object. To improve the quality of the model, it includes diagnostics of the pre-defect state of elements prone to fatigue failure.
Key words: Model, risks of failures, technical object, pre-defect state, fatigue failure.


Ievgen Medvediev*, Iryna Lebid**, Mykyta Bragin*
*Volodymyr Dahl East Ukrainian National University; e-mail:medvedev.ep@gmail.com **National Transport University; e-mail: i.h.lebed@gmail.com
Assessment of the weather and climate conditions impact on the organization and planning of transport support for wheat harvesting-pełny artykuł (full article) - plik PDF



Summary. The article presents the results of the research on the assessment of the weather conditions impact on organization and planning of the transport support in agriculture during the wheat harvesting. With the help of the theoretical studies of the sources and live surveys among the agricultural experts, who are involved in wheat harvesting, the assessment of the weather conditions impact on the organization and planning of transport support for wheat harvesting has been updated. The research on the impact of the weather and climatic conditions on the organization and planning of transport support for the wheat harvesting consists of two parts. The first part consists of a survey on the relevance of taking into account the weather conditions made among the subscribers of the specialized groups in the social networks, the second part – is a categorization of the experts, who are involved in wheat harvesting and the survey regarding the estimation of the weather and climate conditions impact on the organization and planning of the transport support. The relevance of taking into account the weather conditions is confirmed from the point of view of experience by such agrarian experts as: machine operators, combine harvester operators, tractor drivers, truck drivers caring the wheat out from the field to the threshing floor; managers of the agricultural enterprises, engineers, logistic specialists. The outcomes of the research in a shape of estimation of the impact of the weather conditions could be used by the agricultural enterprises when organizing and planning the transport support during the harvesting..
Key words: impact estimation, weather and climate conditions, transport support, harvest, agro meteorological provision.


Oleg Semen, Dmytro Kuzenko, Yaroslav Semen
Lviv National Agrarian University V. Velykogo Str. 1, Dubliany, Ukraine. E-mail: kuzenko-dv@meta.ua


A machine for oriented planting of garlic teeth - pełny artykuł (full article) - plik PDF

Summary.The problem of mechanized planting of garlic teeth with forced placement in the soil with a bottom down, and a germ upwards is considered. It is established that to date, semi-mechanized and mechanized methods of planting this crop have been used predominantly. Used in this machines and equipment have certain design features and innovative solutions that allow the planting of garlic teeth at a given depth and the prepared rows, but do not provide the necessary orientation during direct laying in the soil. The existing machines and separate working bodies intended for garlic planting are analyzed. The overwhelming majority of them are equipped with disk-gripper, tape-gripper, chain-gripper, pneumatic, mechanical-air and disk planting units. During the work, the seeds released from them, under the action of gravity, fall into the groove, formed on the field by a coulter, which is immediately flooded by the soil with the help of coverers. In this case, teeth of garlic are distributed in the soil chaotic and without the necessary orientation. The construction of a machine for semi-mechanized planting of garlic teeth with a pneumatic mechanical system for picking them out of a bunker, orientation and internal-machine transport and a chain-plunger planting machine is proposed. The constructive-technological scheme of the developed planter is given. The constructive features and the principle of work of its separate units and working bodies are substantiated. The technological process of planting garlic teeth with their forced laying in a wedge-shaped groove with a bottom down, and a germ up is described. The interaction of the roller rod of the plunger with the guide of the planting unit is theoretically investigated. The analytical dependences for determining the main kinematic parameters of the interaction of the roller, fixed on the rod of the plunger with the guide when the jaw with a garlic tooth in the ground is dug, are obtained..
Key words: garlic tooth, planter, planting unit, plunger, jaw, guide, roller.


O. Miroshnyk* , T. Shchur**
* Petro Vasylenko Kharkiv National Technical University of Agriculture; e-mail:
omiroshnyk@ukr.net
** Department of Mechanics and Energetics, Lviv National Agrarian University; e-mail:
shchurtg@gmail.com

Neural network prediction parameters quality of electrical - pełny artykuł (full article) - plik PDF



Summary.A method for predicting physical parameters is proposed. The apparatus is considered and an analysis is made of the need to use a neural network for the problem of predicting the quality of electrical energy. The analysis and the structure of neural networks, which are expedient for using for the estimation and forecasting of the quality of electric energy, are chosen. Neural network models are constructed to calculate additional indicators of the quality of electrical energy. Also mathematical expressions for the description of neural networks and their work are given.
Key words: neural network, forecasting, quality electrical energy.


P. Łagowski*, D. Kurczyński*, G. Wcisło**, B. Pracuch***, V. Tomyuk****
*Kielce University of Technology
Department of Automotive Vehicles and Transportation, Poland
Phone: 0048 41 3424332 e-mail: kdarek@tu.kielce.pl
**Faculty of Production Engineering and Power Technologies. University of Agriculture in Krakow, Poland
Phone. 0048 513-157-977, e-mail: grzegorz.wcislo@ur.krakow.pl
***Malopolskie Centre for Renewable Energy Sources "BioEnergia”, Poland
e-mail: gwcislo@bioenergia.com.pl
****Lviv National Agrarian University; Department of Automobiles and Tractors, Ukraine
e-mail: vtomyuk@ukr.net,

Angle of injection impact on the combustion process in a compression-ignition engine - pełny artykuł (full article) - plik PDF

Summary. The article presents the impact of hydrocarbon fuel angle of injection on heat emission characteristics in a compression - ignition AD3.152 engine. The angle of injection has a significant impact on the primary engine operating parameters and combustion process indicators, which include the proportion of combustion which occurs according to kinetic and diffusion models, heat emission rate and the combustion process duration. The characteristics describing emission of a relative heat quantity were determined on the basis of an analysis of actual, indicator diagrams averaged over 100 runs, under the assumption that the combustion process ends by the time the exhaust valve opens. During the test, the engine operated according to an external speed characteristic. Tests were carried out for three fuel angles of injection: 13, 17 and 21 crankshaft rotation degrees.
Key words: angle of injection, Diesel engine, emission, physical and chemical properties of the fuel.


O. Brovarets, Yu. Chovniuk
Kiev Cooperative Institute of Business and Law National University of Life and Environmental Sciences of Ukraine e-mail: brovaretsnau@ukr.net

Integrated systems of management for the performance of technological processes in agricultural production which depend on the initial and final moments of their operation time - pełny artykuł (full article) - plik PDF

Summary. The integrated systems of control of technological processes implementation in agricultural production, which depend on the initial and final moments of their operation time, are substantiated. In order to optimize the management processes of these systems, a generalization of the results of researches of the influence of various factors on the efficiency of crop production has been carried out. The most important technological, technical and organizational criteria of the quality work of agricultural machines are determined along with their level of influence on the final result - the magnitude of the harvested yield, as well as the possible level of efficiency of the application of the corresponding technical means of mechanization with a controlled effect on the quality of the actual performance of the technological operations itself.
Key words: integrated control systems, technological processes, agricultural production, dependence, initial and final moments of functioning/operation.


A. Leœniak*, G. Wcisło**, B. Pracuch***, P. Łagowski****, D. Kurczyński****, V. Tomyuk*****
*Cracow University of Economics. Faculty of Commodity Science. e-mail: lesniaka@uek.krakow.pl
**Faculty of Production Engineering and Power Technologies. University of Agriculture in Krakow, Poland e-mail: grzegorz.wcislo@ur.krakow.pl
***Malopolskie Centre for Renewable Energy Sources "BioEnergia”, Poland gwcislo@bioenergia.com.pl
****Kielce University of Technology Department of Automotive Vehicles and Transportation, Poland -mail: kdarek@tu.kielce.pl
*****Lviv National Agrarian University; Department of Automobiles and Tractors e-mail: vtomyuk@ukr.net,

Determination of the impact of the type of sunflower oil used for production of biofuels on the fractional composition of SFME-pełny artykuł (full article) - plik PDF

Summary. The aim of the study was to determine the impact of the frying process on the fractional composition of SFME Biodiesel in comparison to the SFME obtained from unused (fresh) sunflower oil. The freshly pressed sunflower oil was divided into two portions. One was used for frying potato slices at 210°C for a period of 3 hours. The study showed the SFME biodiesel produced from unused (pure) sunflower oil generally has better distillation properties. The temperatures at the start of distillation were similar for both of the SFMEs. Within the 20-70% mid-range temperatures, the SFME produced from the used cooking sunflower oil was characterized by higher distillation temperatures for the same volume of fuel. The largest differences were observed for distillation temperatures from 85% to 100% and the final temperature of the distillation process. This may testify to lower purity of the SFME produced from the used cooking oil. In such a biofuel there may be more less volatile mono- and diglycerides or other chemicals which e.g. remain in the oil after frying. It must be said, though, these are not solid particles, as those were separated from the oil through filtration.
Key words: biodiesel SFME, biopaliwo, diesel engine, fractional composition, temperature distillation