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of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

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Author: Hristo Beloev

  • MECHANIZATION IN AGRICULTURE

    Evaluation of the quality of work of selected machines

    • Pavol Findura
    • Miroslav Prístavka
    • Hristo Beloev
    • Mitko Nikolov
    • Zoran Malicevic
    • Erik Lavrík
    • Eugen Mizerák
    Mechanization in agriculture & Conserving of the resources, Vol. 69 (2025), Issue 2, pg(s) 33-35
    • Abstract
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    In this paper, we focused on evaluating the quality of work of the IMPRESS 3160 V MASTER baler with a variable chamber from Pöttinger, designed for harvesting bulk forage. The research was carried out during the silage of red clover, with the main goal being to analyze the influence of different driving speeds and technical settings of the machine, such as the number of active cutting knives, on the quality of the resulting bales. The results point to specific combinations of technical parameters and speeds that lead to the optimization of harvesting and increase the quality of the forage. The findings can serve as a basis for more effective use of the machine in practice and for achieving higher productivity and nutritional value of the silage

  • MACHINES

    Theoretical and experimental study of of screw conveyor safety mechanisms

    • Volodymyr Bulgakov
    • Ivan Holovach
    • Zinoviy Ruzhylo
    • Oleksandra Trokhaniak
    • Olha Dubrovina
    • Hristo Beloev
    Machines. Technologies. Materials., Vol. 19 (2025), Issue 6, pg(s) 213-215
    • Abstract
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    The article presents the design of a finger safety clutch with axial withdrawal of a jammed screw to remove it from the overload zone. The theoretical dependences of determining the change in torque during the operation of the finger safety clutch on the angle of relative rotation of the half couplings and the design and technological parameters of the engagement elements are presented. On the basis of force and kinetostatic analysis of the coupling, the nature and magnitude of the change in their torque at all stages of relative rotation of the coupling halves were determined. The developed and manufactured prototypes of the finger safety coupling made it possible to conduct a set of experimental studies. For the safety clutch of a screw conveyor, based on the analysis of theoretical and experimental test data, the adequacy of theoretical calculations and actual values of torques during the mechanism operation was compared.

  • MECHANIZATION IN AGRICULTURE

    Evaluation of the work quality of seeding techniques in soil protection technologies of soil tillage

    • Pavol Findura
    • Miroslav Prístavka
    • Hristo Beloev
    • Plamen Kangalov
    • Mitko Nikolov
    • Maciej Kubon
    • Urszula Malaga-Tobola
    • Erik Lavrík
    • Eugen Mizerák
    Mechanization in agriculture & Conserving of the resources, Vol. 68 (2024), Issue 2, pg(s) 36-38
    • Abstract
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    In our conditions, corn is the most cultivated crop, because it is used mainly as feed for cattle. However, germination as well as the amount of maize produced is influenced by a number of factors, in which it is necessary to focus on achieving uniform emergence, sowing within the optimal time period, achieving the right density and achieving an even distance between plants. The choice of sowing technique has a great influence on the formation of the future harvest, since sowing is one of the most important work operations, usually with an irreversible condition. In this paper, we focused on the comparison of Horsch seeder in different working conditions

  • CONSERVING OF THE RESOURCES

    Comparison of tillage technologies in relation to changes in soil properties using soil biostimulation

    • Pavol Findura
    • Miroslav Prístavka
    • Hristo Beloev
    • Plamen Kangalov
    • Mitko Nikolov
    • Maciej Kubon
    • Urszula Malaga-Tobola
    • Erik Lavrík
    • Maksym Stankevych
    Mechanization in agriculture & Conserving of the resources, Vol. 67 (2023), Issue 3, pg(s) 102-104
    • Abstract
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    Climate change is causing problems for farmers almost throughout Europe, particularly in the area of soil drought. The current soil situation in Slovakia and Europe is not favourable. Declining cattle numbers are causing a shortage of organic fertiliser, soil degradation is occurring, as is soil compaction with high weight agricultural machinery causing changes in the bulk density of the soil and its penetrometric resistance. The aim of this paper is to point out the possibilities of prevention against soil degradation. In this paper we compare the effect of conventional technology and soil conservation technology in combination with soil biostimulation on the change of soil condition.

  • CONSERVING OF THE RESOURCES

    THE BENEFITS AND EFFICIENCY OF PRECISION IRRIGATION

    • Ján Jobbágy
    • Hristo Beloev
    • Koloman Krištof
    • Pavol Findura
    Mechanization in agriculture & Conserving of the resources, Vol. 66 (2020), Issue 6, pg(s) 223-231
    • Abstract
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    The contribution was to develop methods for irrigation management using knowledge in the field of precision agriculture. In the monitoring points were established basic hydrolimits: Field capacity (FC) and wilting point (WP). Irrigation rate ranged from 0 to 40 mm for a specific term assessment of soil moisture. Throughout the growing season used to be applied precisely five irrigation benefits. A high savings were observed between conventional and precise irrigation (water, energy and economic savings). The results show that it is a fully effective system of precision agriculture, although the procurement and introduction of new technology and the software requires first expending a considerable financial cost. Higher demands are placed on the skill and education services.

  • CONSERVING OF THE RESOURCES

    On the possibility of conducting fast and reliable soil tests

    • Krassimir Bratoev
    • Hristo Beloev
    • Atanas Mitkov
    • Georgi Mitev
    Mechanization in agriculture & Conserving of the resources, Vol. 66 (2020), Issue 2, pg(s) 71-76
    • Abstract
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    The current interest in soil awareness is largely due to the increased importance of growing crops in a changing climate. It is characterized by prolonged droughts, followed by short but intense rainfall, often accompanied by strong winds and low temperatures. In a number of situations and due to insufficient information about the condition of the soil and the applied technologies for its treatment, the latter is not able to absorb rainwater, surface water runoff is formed, which exports large amounts of fertile soil and nutrients. An innovative approach is proposed to perform fast and accurate soil tests using its electromagnetic conductivity. A number of physical, chemical and biological properties can be determined by this method.

  • Methodology of evaluation of environmental and technological properties of the mobile energy machine

    • Vasil Mitkov
    • Hristo Beloev
    Mechanization in agriculture & Conserving of the resources, Vol. 64 (2018), Issue 4, pg(s) 114-116
    • Abstract
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    The method of estimation of technological properties of a mobile power tool is presented in the work taking into account the index of its ecological properties. The results of the expert survey are presented to determine the importance of individual indicators in the evaluation of the generalized indicator of the environmental and technological properties of the mobile energy means. Increasing the informativeness of the methodology for evaluating the technological properties of a mobile power tool by taking into account the generalized index of its environmental properties. The structure of the index of environmental properties of depends on the assignment of the estimated energy source and the purpose of the problem to be solved. In our opinion, with a comparative assessment of energy resources as a unit one can adopt the following indicators of their environmental properties. The obtained result shows that today it is more relevant to assess the technogenic impact of a mobile energy facility on the environment than the cost of its implementation unit of work. And with this conclusion, one can not disagree, since the neglect of the impact on the environment in the near future can nullify the economic profit from the production of agricultural products. The evaluation of the importance of individual indicators for a generalized indicator of the ecological properties of a mobile power tool, according to the results of a survey of experts, showed that the most impact is the index of soil consolidation, then mechanical destruction of soil, composition of exhaust gases, pollution of operating fluids, noise, vibration and least impact is a layout diagram of the power tool. The analysis of these indicators allows us to determine which structural-technological or regime parameters of the energy source and to what extent influence the general indicator of its environmental properties. And the more deeply this analysis will be, the most accurate and successful will be proposed constructive-technological or regime measures to improve them.

  • MECHANIZATION IN AGRICULTURE

    EXPERIMENTAL STUDY OF OPERATION INDICATORS OF BEET TOPS HARVESTING MACHINE FOR SUGAR BEET TOPS CONTINUOUS CUTTING

    • Volodymyr Bulgakov
    • Valerii Adamchuk
    • Yevhen Ihnatiev
    • Hristo Beloev
    • Plamen Kangalov
    • Boris Borisov
    • Georgi Mitev
    Mechanization in agriculture & Conserving of the resources, Vol. 64 (2018), Issue 2, pg(s) 39-41
    • Abstract
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    Field experimental studies of a new beet tops harvesting machine, which is front mounted on a wheeled tractor aggregating tractor, are carried out, carrying out a continuous non-sensing cut of the green massif of sugar beet tops. At the same time, a new laboratory-field installation was developed, which consists of a rotor type front mounted rotary type machine with a horizontal axis of rotation, a transverse screw for collecting the cutted leaves from all width, and a loading mechanism in the form of a paddlewheel and a loading nozzle. During the field experiments, the tractor moving with a specified speed regime fixed by track measuring wheel, the total cutting height was set in a predetermined interval by means of two pneumatic sensing wheels with adjustment mechanisms. The rotational speed of the rotary cutter, with arched knives mounted on the drive horizontal drum, was varied with the help of replacement asterisks. In the prepared area of sugar beet field, the beet tops was cut at various parameters of the harvesting process, which was then estimated by the size of the remaining tops remnants left on root crops heads and in the aisles. According to the developed program and methodology, statistical processing of the results of experimental studies with the help of a personal computer was subsequently carried out, which allowed obtaining graphical dependencies of the indicated tops residues on the root crops heads, which made it possible to establish performance of new harvesting machine for continuous cutting of sugar beet tops. The established dependencies made it possible to choose rational constructive and technological parameters for harvesting tops by front mounted harvesting machine.

Congresses and conferences

  • IX International Scientific Conference
    "High Technologies. Business. Society"
    04.-07.03.2024 - Borovets, Bulgaria
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    06.-09.03.2024 - Borovets, Bulgaria
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    26.-29.06.2024 - Varna, Bulgaria
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    26.-29.06.2024 - Varna, Bulgaria
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    02.-05.09.2024 - Varna, Bulgaria
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    02.-05.09.2024 - Varna, Bulgaria
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    04.-07.09.2024 - Varna, Bulgaria
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    04.-07.09.2024 - Varna, Bulgaria
  • IX International Scientific Conference
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    09.-12.12.2024 - Borovets, Bulgaria
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    09.-12.12.2024 - Borovets, Bulgaria
  • IX International Scientific Conference
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    Winter session
    11.-14.12.2024 - Borovets, Bulgaria
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    11.-14.12.2024 - Borovets, Bulgaria

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