Tekhnikotekhnologichni aspekti rozvitku ta viprobuvannia novoyi tekhniki i tekhnologii dlia sil''s''kogo gospodarstva Ukrayini最新文献

{"title":"REGULATORY AND METHODOLOGICAL ASPECTS OF TYPE APPROVAL OF AGRICULTURAL AND FORESTRY VEHICLES","authors":"V. Kravchuk, T. Tsema, S. Afanasieva","doi":"10.31473/2305-5987-2021-1-28(42)-2","DOIUrl":"https://doi.org/10.31473/2305-5987-2021-1-28(42)-2","url":null,"abstract":"Goal of the study – development and implementation of provisions for further updating and improvement of the components of the mechanism of application of Technical Regulations on type-approval of agricultural or forestry tractors, their trailers and interchangeable towed machinery, together with their systems, components and separate technical units, approved by the Resolution of the Cabinet of Ministers of Ukraine dated 28.12.2011 № 1367 (hereinafter – Technical Regulation 1367/2011), using the results of research carried out in L. Pogorilyy UkrNDIPVT in relation to the type approval system in the sector of agricultural and forestry vehicles, and an analysis of the main regulatory and methodological aspects of the type approval of the specified equipment. Research methods are to study, analyze, compare, summarize and evaluate data, including the comparative law method used in the analysis of domestic and European legislation in the field of assessment and verification of conformity (type approval) of agricultural and forestry vehicles. Results. The results of updating the mechanism of application of the current Technical Regulation 1367/2011 have been received and implemented. Resolution of the Cabinet of Ministers of Ukraine of 04.12.2019, № 1168 was adopted and implemented, which amended the Technical Regulation 1367/2011 and the procedure for departmental registration of agricultural and forestry vehicles, proposals for which were prepared based on the research results of the L. Pogorilyy UkrNDIPVT. Developed, reviewed and approved by the order of the Ministry of Economy dated 30.12.2020 № 2810 updated List of national standards for the purposes of application of the Technical Regulation 1367/2011, which sets requirements for these vehicles, their systems, components and separate technical units . Proposals have been prepared for further development of national standards included in the List, based on new versions of international ISO standards. Further steps in the direction of improving the procedures for type approval and entry into service of agricultural and forestry vehicles are identified. Conclusion. Updated and implemented as a result of research requirements and provisions for improving the type approval and registration of agricultural and forestry vehicles are practically used during type approval in accordance with Technical Regulation 1367/2011 and create grounds for improving safety, reducing the negative impact of these vehicles on human, animal and environmental health, simplify procedures for verification of their conformity and registration, introduce gradual approximation to European standards, including on environmental indicators.","PeriodicalId":34711,"journal":{"name":"Tekhnikotekhnologichni aspekti rozvitku ta viprobuvannia novoyi tekhniki i tekhnologii dlia sil''s''kogo gospodarstva Ukrayini","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45396092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IMPROVEMENT OF MUFFLER S DESIGN FOR REDUCTION OF THE LEVEL OF SOUND PRESSURE ON SMALL TRACTORS OPERATORS","authors":"M. Podolsky, I. Y. Lilevman, O. Lilevman, O. Y. Kedrovsky","doi":"10.31473/2305-5987-2021-1-28(42)-3","DOIUrl":"https://doi.org/10.31473/2305-5987-2021-1-28(42)-3","url":null,"abstract":"Noise background, as an important factor in the working conditions of agricultural operators, has a direct impact on human health and productivity. This topic is especially relevant for small tractors, which in most cases are not equipped with cabs. One of the main means of reducing the sound pressure on the operator are the mufflers of exhaust gases, which mainly have a labyrinth-absorbing type of action. The paper proposes a fundamental approach to the design of the muffler by the criterion of reflection and scattering of sound waves with the verification of efficiency by computer simulation. The purpose of research: - to improve the working conditions of operators of small tractors that are not equipped with cabs, by reducing the sound pressure level from internal combustion engines; - to improve the noise-absorbing properties of mufflers of exhaust gases of engines with observance of requirements to manufacturability of process of their manufacturing; - to develop a structural scheme of the exhaust gases muffler based on the results of preliminary modeling and analysis of the trajectory of the gas flow in the cavity of its working part. Methods. Determination of the sound pressure level of the engine of a small tractor by mathematical (computer) modeling of the behavior of the exhaust gas flow in the muffler cavity in different frequency ranges. Results. The article analyzes the main sources of noise during the operation of agricultural machinery with internal combustion engines (ICE). On the basis of literature sources and methods, their separate degree of influence on the complex picture of noise pollution of the working space of the operator of a small tractor is established. A comparative analysis of the efficiency of mufflers, created on the generally accepted principles and approaches to the design of such devices. According to the results of previous tests, shortcomings and limitations in the application of design concepts were identified, an additional analysis of external causes and factors was made, and adjustments were made to the method of creating muffler designs. An alternative design approach to the creation of internal combustion engine mufflers of small tractors is proposed and computer modeling of the processes of sound pressure distribution and sound waves in their cavity is performed. Conclusions. 1. A layout diagram of the design of the exhaust muffler, containing a resonator chamber and a shell module, which is made in the form of a three-stage ribbed diffuser of oscillations of the exhaust flow pulses with an additional surface layer of the vibration absorber. The parameters of the exhaust flow of exhaust gases of a typical diesel engine of a small tractor with a capacity of 24 hp are calculated. (pressure - 11652 Pa, acceleration – 90-105 m / s2, frequency - 1950-3300 Hz), which performed computer simulations of the process of gas movement in the muffler cavity of the proposed layout. Optimal design parameters were sel","PeriodicalId":34711,"journal":{"name":"Tekhnikotekhnologichni aspekti rozvitku ta viprobuvannia novoyi tekhniki i tekhnologii dlia sil''s''kogo gospodarstva Ukrayini","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46572140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EVALUATION OF THE AUTOMATIC MOBIL MILK RECEIVING UNIT OF DOMESTIC PRODUCTION","authors":"V. Smolyar, K. Postelga, O. Kovtun","doi":"10.31473/2305-5987-2021-1-28(42)-13","DOIUrl":"https://doi.org/10.31473/2305-5987-2021-1-28(42)-13","url":null,"abstract":"The purpose of the research – to conduct experimental testing aimed at evaluating of the automatic mobil milk receiving unit of domestic production. Research methods. During the testing of the automatic mobil milk receiving unit of domestic production the quality of the technological process was determined using the methods given in DSTU 7435: 2013 and DSTU 3662: 2018, operational-technological and economic evaluation was carried out according to DSTU 8424: 2015 and DSTU 4397: 2005, safety and ergonomics were determined according to DSTU EN ISO 12100: 2014. Research results. According to the results of experimental testing, it was found that the automatic mobil milk collection unit АППМ-1 at the appropriate level measures the amount of delivered milk with an error of 0,9 %, which meets the requirements of the TU (up to 3,0 %). The water temperature for washing equipment is 58 °C, which meets the requirements of TU (50-60 °C). The system of washing of surfaces of the automatic point which are in contact with milk provides high-quality washing of the equipment, existence of an intestinal stick (coli-titer) makes > 1,0 that meets requirements of TU (not less than 1,0). The period of acceptance, transportation and delivery of milk to the processing plant for one working cycle of procurement is 3,3 hours, which meets the requirements of the TU (not more than 4 hours). Productivity of the automatic point of reception of АППМ-1 milk during performance of technological process on reception, registration and transportation of milk in a radius of 30 km makes 363 l / h, for a radius of transportation in 50 km - 330 l / h, 100 km - 280 l / h, that meets the requirements of TU (275-360 l / h). Specific fuel consumption (liquefied gas) is 7,4 liters per ton of milk collected. Conclusions. The first experimental testing of the domestic automatic milk collection point APPM-1 showed that the equipment satisfactorily performs the specified technological process of acceptance, registration, short-term storage of milk obtained in private farms and transporting it to processing enterprises, according to the quality of the process meets the requirements of technical conditions. The automatic milk collection point АППМ-1 is characterized by a high technical level and can be used in Ukraine.","PeriodicalId":34711,"journal":{"name":"Tekhnikotekhnologichni aspekti rozvitku ta viprobuvannia novoyi tekhniki i tekhnologii dlia sil''s''kogo gospodarstva Ukrayini","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45397323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TECHNICAL SUPPORT OF MODERN LIVESTOCK FARMS","authors":"V. Smolyar","doi":"10.31473/2305-5987-2021-1-28(42)-11","DOIUrl":"https://doi.org/10.31473/2305-5987-2021-1-28(42)-11","url":null,"abstract":"The purpose of the research – is to form a priority list of domestic and foreign machines and equipment for mechanization of dairy, fattening cattle and sheep farms. Research methods. Analytical studies were conducted to form a priority list of domestic and foreign machines and equipment for mechanization of dairy and fattening farms of cattle and sheep farms. A review of a large array of information materials on technical means, taking into account their novelty, basic technical characteristics, including performance, reliability, quality of technological process, safety, as well as compliance with regulatory requirements of Ukraine and the European Union was made. Research results. For the first time analytical researches on formation of the priority list of domestic and foreign cars and the equipment for mechanization of dairy, fattening farms of cattle and sheep farms are carried out. During the research, a significant array of information materials on technical means was reviewed, taking into account their novelty, basic technical characteristics, and actually productivity, reliability, quality of technological process, safety, as well as compliance with regulatory requirements of Ukraine and the EU. Conclusions. The priority list of domestic and foreign machines and equipment for mechanization of dairy, fattening cattle and sheep farms formed on the basis of analytical research will be used in practice during the creation, reconstruction, re-equipment of livestock facilities on a new technical and technological basis.","PeriodicalId":34711,"journal":{"name":"Tekhnikotekhnologichni aspekti rozvitku ta viprobuvannia novoyi tekhniki i tekhnologii dlia sil''s''kogo gospodarstva Ukrayini","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44371338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TRACTOR DYNAMICS AS A COMPLEX MECHANICAL SYSTEM SPATIAL FRAME TYPE","authors":"E. Kalinin, Y. Kolesnik, Y. Kozlov","doi":"10.31473/2305-5987-2021-1-28(42)-5","DOIUrl":"https://doi.org/10.31473/2305-5987-2021-1-28(42)-5","url":null,"abstract":"Purpose of the study is to develop a matrix method for studying the dynamics of a tractor as a multi-mass spatial system of rigid bodies with an arbitrary arrangement of elastic suspension of bodies on shock absorbers relative to a fixed support surface and the presence of elastic connections between the bodies, made in the form of beam elements. Research methods. The methodological basis of the work is the generalization and analysis of well-known scientific results regarding the dynamics of two-mass systems in resonance modes and the use of a systematic approach. The analytical method and comparative analysis were used to form a scientific problem, determine the goal and formulate the research objectives. When creating empirical models, the main provisions of the theory of stability of systems, methodology of systems analysis and research of operations were used. The results of the study. A wheeled vehicle is presented as an amortized continuous frame type structure with assemblies and assembly units located on it, as well as a methodology for calculating individual block matrices of stiffness and damping coefficients. In this case, it is assumed that a viscous damper can be connected in parallel to each elastic element. In this construction of the stiffness and damping matrix of the block matrix are formed in the same way. Damping matrices are derived from the corresponding matrices by substituting damping constants instead of stiffness constants. To determine the natural frequencies and vibration modes of an undamped system using a PC, the most effective method of diagonalization by successive rotations. This method provides a complete solution to the problem, allowing all frequencies and shapes to be determined simultaneously, and good convergence. Conclusions. The considered method for analyzing and calculating the dynamics and vibration damping of a tractor as a complex mechanical system is based on a matrix record of the problem of spatial vibrations of a system of rigid bodies with elastic bonds. Matrix equations seem to be especially useful in the study of complex tightly coupled systems with the obligatory use of a PC. The presented work provides a complete methodology for calculating a tractor as a complex mechanical system such as a spatial frame with equipment installed on it.","PeriodicalId":34711,"journal":{"name":"Tekhnikotekhnologichni aspekti rozvitku ta viprobuvannia novoyi tekhniki i tekhnologii dlia sil''s''kogo gospodarstva Ukrayini","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46961210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"STABILITY OF VIBRATIONS OF THE TRACTOR AS A TWO-MASS MODEL WITH TWO NONLINEARITIES OF THE TYPE OF DRY FRICTION IN RESONANCE MODES","authors":"E. Kalinin, Y. Kolesnik, M. Myasushka","doi":"10.31473/2305-5987-2021-1-28(42)-6","DOIUrl":"https://doi.org/10.31473/2305-5987-2021-1-28(42)-6","url":null,"abstract":"Purpose of the study is to assess the possibility of calculating the stability of tractor oscillations as a system with nonlinearities such as dry friction due to the inverse problem. Research methods. The methodological basis of the work is the generalization and analysis of known scientific results regarding the dynamics of two-mass systems in resonance modes and the use of a systematic approach. The analytical method and comparative analysis were used to form a scientific problem, determine the goal and formulate the research objectives. When creating empirical models, the main provisions of the theory of stability of systems, methodology of system analysis and research of operations were used. The results of the study. Oscillations of the system with harmonic excitation by its base are considered (for example, the movement of a tractor on an uneven supporting surface). Oscillations of this system are described by nonlinear differential equations. To solve this equation, instead of friction dampers with friction forces, linear dampers with corresponding drag coefficients are included in the system. By solving the obtained system of linear inhomogeneous differential equations for the steady-state mode of oscillation, the amplitudes of oscillations of masses and deformation of springs with certain stiffness are determined. To clarify the effect of friction forces on mass oscillations in resonance modes, the obtained expressions were analyzed. A diagram of stability of mass oscillations in resonance modes is obtained. Conclusions. It has been established that if the coefficients of relative friction have such values that the point that is determined by them lies within the region bounded by segments 1-2 and 2-3 and coordinate axes, then during oscillations in the low-frequency resonance mode, the friction forces do not limit the increase in amplitudes fluctuations of masses, but only reduce the rate of their growth. If the point, which is determined by the coefficients of relative friction, lies in the region 1-1'-2'-3 '3-2-1, then the springs have intermittent deformation, that is, during the period of oscillation, one mass of the system has stops relative to another mass, or the last has stops relative to the support surface, or both masses move part of the period as a whole with the support surface. At resonance with a high frequency, the friction forces limit the amplitudes of mass oscillations if the coefficients of relative friction have such values that the point that is determined by them does not lie in the region bounded by segments 4-5 and 5-6 and the coordinate axes. Sections 4-5 and 5-6 define the boundaries of vibration stability at resonance (lines of critical ratios of the coefficients of relative friction).","PeriodicalId":34711,"journal":{"name":"Tekhnikotekhnologichni aspekti rozvitku ta viprobuvannia novoyi tekhniki i tekhnologii dlia sil''s''kogo gospodarstva Ukrayini","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41496792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CROSSKILL AND STAR-WHEELED ROLLERS. FUNCTIONAL AND DYNAMIC TESTS","authors":"L. Shustik, Pogorilyy UkrNDIPVT, V. Pogoriliy, N. Nilova, T. Gaidai, S. Stepchenko, S. Sidorenko","doi":"10.31473/2305-5987-2021-1-28(42)-7","DOIUrl":"https://doi.org/10.31473/2305-5987-2021-1-28(42)-7","url":null,"abstract":"Experimental field research of crosskill and star-wheeled rollers similar by design provides their developers and users with information on understanding their design and functional features. The purpose of the research is to compare the functional features of crosskill and star-wheeled rollers according to the criteria of clods breaking effect, compacting action, resistance to sticking in the range of pre-sowing and surface tillage depth. Methods and materials. Dynamic tests involved the study of three types of rollers. The research hypothesis assumed that the selected criteria for evaluating the work of rollers (intensity of breaking of clods, compacting action of rollers, intensity of bottom compaction and performance of rollers at high soil moisture) depend on roller pressure and different speed regimes, as they are derived from the shape of work surfaces. Sub-criteria studies were supposed to be carried out on the same type of soil: clods breaking characteristics on dry W = (10… 12) %, compacting effect on physically mature soil W = (15… 20) %, efficiency at high humidity - W = (25… 27) %. Evaluation of soil characteristics was performed by thermostatic-weight method according to the generally accepted method of \"cutting ring\" [Kaczynski NA, 1947], according to the volume of the cylinder 100 cm3. To determine the intensity of bottom compaction used the methodology and technical means of L. Pogorilyy UkrNDIPVT development. Statistical analysis of experimental data was performed by the method of analysis of variance according to [Dospekhov, 1985] and interpreted by standard computer programs Excel in the form of graphs. Results. The intensity of clods breaking with a classic roller is the lowest and depends on the speed of movement. The intensity of breaking by the modernized roller is approximately 1.1 times higher and with increasing speed is almost stable. The intensity of clods breaking by a specialized roller is the highest and almost (10...20) %, respectively, exceeds the previous two rollers and does not significantly depend on the increase in speed. The greatest compaction of the soil (the height of the layer to which the pre-prepared soil asked after the passage of the roller) is characteristic of a specialized roller, which is almost (1.5…1.7) times higher than the classic and modernized, respectively. Depending on the depth of pre-tillage (5…10) cm, compaction by rollers varies approximately twice. The greatest intensity of compaction of a bottom is provided by the specialized roller, and modernized and classical condense accordingly in (1,2…1,4) times below. The specialized roller sticks the fastest, which is facilitated by the 4-tier arrangement of working surfaces and their maximum in comparison with others contact with the ground. Sticking of the modernized roller surface is as that of the specialized. The classic roller surface remains clean for the longest time. Conclusions. The classic roller compacts both the upper and lower","PeriodicalId":34711,"journal":{"name":"Tekhnikotekhnologichni aspekti rozvitku ta viprobuvannia novoyi tekhniki i tekhnologii dlia sil''s''kogo gospodarstva Ukrayini","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49332895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INFLUENCE OF NATURAL FACTORS ON THE QUALITY OF DRYING CORN GRAIN IN A MODULAR TYPE DRYER","authors":"N. Zanko, T. Gaidai, S. Stepchenko, N. Nilova","doi":"10.31473/2305-5987-2021-1-28(42)-10","DOIUrl":"https://doi.org/10.31473/2305-5987-2021-1-28(42)-10","url":null,"abstract":"Aim. Investigation of the influence of natural factors on the quality of grain drying in a grain modular dryer. Methods. Experimental studies in operational conditions and graphical modeling of dried grain moisture depending on natural factors. The results. The change in the environmental conditions causes a certain influence on the return of the spent waste dryer to the environment and the processes of drying the grain in it. This causes the production of undried grain and reduced drying efficiency. The influence of natural factors - temperature and humidity, atmospheric pressure and wind speed on the humidity of corn grain during its drying with a single-module grain dryer has been studied. The output of the refrigerant with moisture vapor is carried out through the perforated panels of the dryer circuit and at the same time experiences some resistance from atmospheric pressure. The results show that the reduction of atmospheric pressure helps to reduce the resistance for the exit of the coolant through the surface of the dryer housing. As a result, the coolant in the chamber is more efficiently spent on the grain drying process. This is evidenced by the simultaneous decrease in pressure and humidity of the dried grain The dryer is also affected by the wind: its body experiences cooling, and the drying temperature and drying conditions of the grain deteriorate. Thus, during the research period, the wind speed decreased from 5,3 m / s to 4,4 m / s, and the humidity of the dried grain decreased from 15,2 % to 13,9 %. That is, the reduction of the effect of wind on the surface of the dryer has a positive effect on the drying process of grain. The ambient air is characterized by the moisture present in it. Its reduction in atmospheric air promotes better moisture yield from corn grain and the \"filling\" of this air moisture: the humidity of the dried grain decreases. The positive temperature of the atmospheric air causes additional thermal action on the dryer and the drying process in it. In this case, the heat supplied to the working chamber of the dryer is more productively used for the drying process: in accordance with the increase in atmospheric air temperature, the humidity of the dried grain decreased from 15,2 % to 13,9 %. Based on the results of experimental studies, graphical dependences of the humidity of dried corn grain on humidity, pressure, temperature and velocity of atmospheric air are constructed. The grain harvester is a system adapter for Conclusions. Conclusions. The process of grain drying and the moisture content of the resulting dried grain of modular grain dryers depends on the influence of objective natural factors. These include, in particular, the weather conditions during the operation of dryers. With an increase in humidity, pressure and air velocity, the quality of drying deteriorates: when the moisture content of the grain decreases from 18,5 ° C to the regulated 14 %, with a single pass through the dryer, the moistur","PeriodicalId":34711,"journal":{"name":"Tekhnikotekhnologichni aspekti rozvitku ta viprobuvannia novoyi tekhniki i tekhnologii dlia sil''s''kogo gospodarstva Ukrayini","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48592850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ACTIVE AND PASSIVE WORK OF THE TRACTOR IN THE COMPOSITION OF TILLAGE UNITS","authors":"A. Lebedev, S. Lebedev","doi":"10.31473/2305-5987-2021-1-28(42)-4","DOIUrl":"https://doi.org/10.31473/2305-5987-2021-1-28(42)-4","url":null,"abstract":"Purpose of the study. Improving the efficiency of using a tractor as part of a tillage machine through scientific and technical substantiation of energy conservation. This goal is achieved by increasing the active (useful) and reducing the passive (not useful) work of the tractor. Research methods. The method of partial accelerations based on the reverse transition from the vector sum in the space of forces acting on the tractor to the vector sum in the space of accelerations is the basis for assessing the traction-energy and dynamic parameters of tractors in the composition of tillage machines. The results of the study. The unevenness of the movement significantly affects the decrease in the active work of the tillage unit and, accordingly, the increase in the passive work. A dependence is proposed for determining the additional energy consumption for oscillatory movements with an uneven movement of the tractor unit. It is proved that the additional energy consumption during the unstable movement of the tillage unit on the rut is 2-3 % (passive work) of the total energy consumption. The method of partial accelerations, which is based on the reverse transition from the vector sum in the space of forces acting on the tractor, to the vector sum in the space of accelerations, is the basis for assessing the traction-energy and dynamic parameters of tractors in the composition of tillage machines. On the basis of this method, the methodology for assessing the traction-energy and dynamic indicators of the tractor when performing the technological process without the use of dynamometric means has been substantiated. The modernized measuring and registration complex, developed with the participation of the authors of the article at the Kharkiv National Automobile and Highway University, P. Vasilenko Kharkiv National Technical University of Agriculture and the Kharkiv branch of L. Pogorilyy UkrNDIPVT in the direction of software for assessing the resistance of aggregated machines, traction efficiency of the tractor, longitudinal acceleration of the unit. The use of this complex when testing tractors is aimed at implementing the methodology of L. Pogorilyy UkrNDIPVT with the definition of traction indicators of tractors and standards of the Code 2 of the Organization for Economic Cooperation and Development (OECD). Conclusions. The article contains a theoretical generalization and a new solution to the scientific problem of increasing the efficiency of a tractor as part of a tillage unit, based on a decrease in additional energy costs (passive work). The research results made it possible to formulate the main theoretical and scientific-practical conclusions. The scientific value of the study lies in clarifying the dependence of the tractor operation as part of the tillage machine in the direction of reducing the useless (passive) work on turns at the headland and on a turn on the rut. It has been proven that in order to ensure maximum operation of this uni","PeriodicalId":34711,"journal":{"name":"Tekhnikotekhnologichni aspekti rozvitku ta viprobuvannia novoyi tekhniki i tekhnologii dlia sil''s''kogo gospodarstva Ukrayini","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42729914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prospects for growing and use of energy crops in Ukraine","authors":"O. Tryboi, T. Zheliezna, A. Bashtovyi","doi":"10.31473/2305-5987-2021-1-28(42)-24","DOIUrl":"https://doi.org/10.31473/2305-5987-2021-1-28(42)-24","url":null,"abstract":"The purpose of the study is to analyze the current state, existing obstacles and prospects for growing and using energy crops in Ukraine. Different aspects such as the availability of unused land for cultivation, technical and economic indicators of relevant projects, as well as the results of life cycle assessment of heat production from energy crops are taken into account. Research methods include analysis and processing of official statistics on the area of land of different categories in Ukraine; performance of life cycle assessment for growing energy crops for heat production in terms of energy efficiency and reduction of greenhouse gas emissions; carrying out of feasibility study of respective projects. Results of the study show that there are up to 4 million hectares of unused agricultural land in Ukraine annually, which can be used for growing energy crops without creating competition for food production and without violating the criteria of sustainable development. The life cycle of projects for growing perennial energy crops for heat production has high energy efficiency, and the value of greenhouse gas emissions reduction depends significantly on the distance of transportation of biofuels. However, projects for the cultivation of such energy crops as willow, poplar, and miscanthus have economic indicators on the verge of profitability, and therefore may not be attractive enough for investors. Conclusions. Growing and using energy crops is one of the most promising sectors of bioenergy in Ukraine. The advantages of this area are the ability to obtain all types of biofuels (solid, gaseous, liquid biofuels) to replace traditional energy sources, a positive impact on soil (increase in organic matter, phytoremediation of contaminated lands) as well as local economic development and job creation in the regions. To improve the economic performance of the relevant projects, it is necessary to introduce a state subsidy for the cultivation of energy crops at the level of 20-24 thousand UAH per ha, depending on the type of crop.","PeriodicalId":34711,"journal":{"name":"Tekhnikotekhnologichni aspekti rozvitku ta viprobuvannia novoyi tekhniki i tekhnologii dlia sil''s''kogo gospodarstva Ukrayini","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45476000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}