scholarly journals INVESTIGATION OF THE PROCESS OF INTERACTION BETWEEN ROOT AND AUGER SCREW

2020 ◽  
Vol 1 (37) ◽  
pp. 38
Author(s):  
S. Marinenko ◽  
O. Korol ◽  
O. Hurik

Increasing the technological efficiency of root harvesting machines by developing and substantiating new technological processes for the operation of root crop heap cleaning systems is an urgent task. The purpose of the study is to develop theoretical mathematical models of the functioning of the working bodies of treatment systems. Mathematical models of the resulting velocity and the angle of reflection of the root crop from the surface of the auger screw, which is mounted above the working branch of the feed conveyor, were obtained.

2020 ◽  
Vol 2 (38) ◽  
pp. 46
Author(s):  
E. Berezhenko

Improving the technological efficiency of the machines for harvesting root crops by reducing the energy costs of the process of harvesting the main array of hills is an urgent task. The solution to this problem is possible through the development of new energy-saving methods of assembly of the main array of hills and improved designs of hock-harvesting modules. The article provides an analysis of the methods of harvesting hogs and working bodies of harvesting modules. On the basis of the analysis, an energy-saving method of assembling the main array of the ridge and a scheme of an improved jerking module are proposed.Key words: rotary cutter, auger, guide channel, dividing disk, laying of a twig, row spacing of root crops.


Author(s):  
D. N. Radnaev ◽  
Yu. А. Sergeev ◽  
А. А. Abiduev ◽  
S. V. Petunov

Currently, agricultural science and practice has a large amount of experimental data that need to be taken into account in the development of new technological processes and working bodies. Therefore, there is a need to design technical processes in order to identify their effectiveness. In this regard, the use of methods of synthesis of technological processes based on the characteristics of tillage, seeding and production system of the economy, in which it is necessary to implement the projected process. In the General statement of the problem, the design of technological processes is one of the complex problems with the following characteristic feature: lack of knowledge about the methods of designing technological processes, suitable for system - structural modeling and algorithmization of design processes. To overcome this incompleteness, a systematic approach is needed. The system approach proceeds from the fact that the specificity of complex objects and processes is not limited to the features of its constituent parts and elements, but lies in the nature of relationships and relationships between them. In this paper, the design methodology is based on the formulated fundamental assumptions and principles of the whole system of more specific statements, revealing the structure and content of design operations, the synthesis of the choice of solutions. The principles of technological compatibility and emergence suitable for system-structural analysis of complex technical means and technological processes, consisting of statements having a hierarchical structure, where the degree of detail of the goals from level to level increases, and the approval of the last level determines the direction of the search for the optimal solution to the problem.


2019 ◽  
Vol 8 (2) ◽  
pp. 3829-3833

Research objectives. The paper describes the process of development of a set of mathematical models for assessment of agricultural production technologies to be used as the basis of a software complex module for managing technological processes in crop farming. The reported study was funded by RFBR according to the research project № 18-37-00148. Methods. Given the specifics of management in agriculture, it is worth noting that the lack of objective information across the production cycle in crop farming and the subsequent misalignment with an optimum technology results in overshooting labour and material costs, lost profits for the enterprise or even losses. These issues have to be addressed through advanced studies of economic and mathematical models and methods for analysis and assessment of economic efficiency of agricultural crop cultivation technologies and the development of a comprehensive automated information support system for decision-making in crop farming management. Results. A methodology is proposed for selecting economically efficient technological processes in crop farming, involving the sequential application of results obtained through the analysis of technological process criteria by the methods of binary decision matrices, cobweb diagrams and the matrix assessment model, taking into account their orientation at the economic performance of crop farming. Practical significance and applicability of results. The authors developed a complex of software and information support and assessment of technological processes in crop farming, with experimental trials showing improved efficiency of crop farming production through the well-reasoned selection of agricultural crop cultivation technologies.


2021 ◽  
pp. 68-71
Author(s):  

The use of mathematical models is of great importance for the automation of the design of technological processes. Representation of the geometric parameters of the part in the form of mathematical models allows automating the development of the structure and calculation of the parameters of the technological process, which is important for the complete digitalization of the technological preparation of production. Keywords: technological process, design, mathematical model, digitalization. [email protected]


2020 ◽  
Vol 2 (38) ◽  
pp. 55
Author(s):  
V. Boyko

Reducing the damage and loss of root crops during their mechanized harvesting, or performing the operation of trimming the remnants of the root from the heads of the roots, is an urgent scientific task. Improving the quality of root crop harvesting is achieved through the development and justification of the parameters of improved designs of trimmings of the remains of the boar from the heads of the roots. In the article, on the basis of the analysis of methods of removal of the remains of a hillock from the heads of root crops and working bodies, an improved design of the cutter of the heads of roots is proposed, which is made on the principle of "passive copier-active knife".Key words: module for harvesting the swill, rotary swath cutter, passive copier, active knife, parallelogram suspension, compensator.


2020 ◽  
Vol 20 ◽  
pp. 36-40
Author(s):  
T. Berezhanskyi ◽  
Ya. Moshkola

Today, in Ukraine, fire-fighting and rescue units in the event of fires and emergencies of a natural and anthropo-genic nature are often forced to operate emergency life-saving tools and equipment that are partially worn or outdated. It is extremely costly to completely replace the equipment of all fire and rescue units. Therefore, the development of methods for the restoration of worn or partially worn parts of fire and rescue equipment, as well as increasing their service life and interrepair interval, is an urgent task for today.The proposed work is devoted to the application of eutectic coatings based on the Fe-Mn-C-B-Si alloy Cr system for the restoration of partially wornout steel parts of firefighting equipment and rescue equipment, as well as to increase the service life (lifetime) of these parts. The essence of the experimental study was to compare the wear of the cutting elements of hydraulic emergency rescue scissors "Hydrum H-32" series production and scissors with a protective eutectic coating. The work life of the eutectic coatings of Fe-Mn-C-B-Si doped Cr working bodies of emergency rescue scissors in 1.8 times greater than that of working bodies of serial production, so it is advisable to repair such worn parts of the rescue and fire tool. Due to the relatively low cost of eutectic alloys based on iron, this method is economically viable as an alternative to replacing parts with new ones. This type of coating can also be applied to other steel parts of fire-fighting and rescue equipment to restore worn parts and increase service life and overhaul intervals. The use of durable eutectic iron based coatings is economically feasible given their relatively low cost.


Author(s):  
Ігор Леонідович Левчук ◽  
Олег Петрович Мисов ◽  
Ксенія Олексіївна Фесенко ◽  
Антон Романович Шейкус

The subject of study in the article are methods for integrating mathematical models of chemical-technological processes implemented in universal modeling programs into modern SCADA systems for developing and improving methods for controlling these processes. The goal is to develop a control system for the synthesis of acetylene in a kinetic reactor, based on a computer model created in universal modeling programs and integrated into SCADA using open platform communications (OPC) technology. Tasks: to create a mathematical model of the process of synthesis of acetylene based on the selected universal modeling program; to develop a way to integrate the resulting model into modern SCADA using OPC technology; to develop in SCADA a control system for the process of synthesis of acetylene according to a mathematical model as part of a functional human-machine interface and control subsystem algorithms; get transient graphs and prove the efficiency of the control system. Conduct a process study using a mathematical model. The methods used are computer simulation of technological processes; OPC technology; SCADA based management. The following results are obtained. A control system for the acetylene synthesis process based on SCADA Trace-Mode and a mathematical model implemented in the ChemCAD package has been developed, while the model - control system information exchange is implemented based on OPC technology. Checked and proved the efficiency of the resulting control system. A mathematical study of the process was carried out, an experimental dependence of the yield of the final product, acetylene, on the temperature, and consumption of raw materials at the inlet of the reactor was established. Conclusions. The novelty of the results is as follows. A new method is proposed for integrating mathematical models implemented in the ChemCAD modeling package into modern SCADA, based on OPC technology. A study of the process of acetylene synthesis by a mathematical model was carried out, experimental dependences of the acetylene yield on temperature and ethylene consumption at the inlet of the synthesis reactor were obtained. An analysis of the obtained experimental dependences showed the need to use cascade control algorithms to increase the efficiency of controlling the process of acetylene synthesis in a kinetic reactor.


2021 ◽  
pp. 435-441
Author(s):  
A.N. Mikhaylov ◽  
D.A. Mikhaylov ◽  
E.A. Sheiko ◽  
A.A. Colodyazhny

Mathematical models have been developed for the surface hardening of VT20 and OT4 titanium alloys by electrospark alloying, which can be used in the design of technological processes for the manufacture of titanium blades of steam turbines.


2021 ◽  
Vol 5 (3) ◽  
pp. 146-152
Author(s):  
F. V. Mitin ◽  
E. N. Nikulin

This article discusses the process of deployment a two-link spoke of a large-sized transformable space-based reflector. In view of the high costs of carrying out field tests, the construction of correct mathematical models is an urgent task. Currently, the creation of large-sized systems is actively developing. Such systems consist of several interconnected links. When delivered to a given orbit, the large-sized system is folded for placement in the launch vehicle. After entering the orbit, it is deployed to the specified operating state. A mathematical model has been developed for the deployment of the spoke, improved in terms of taking into account the separation of parameters depending on the length and time, which makes it possible to study the arising vibrations of the structure. It is important to take into account the backlash in the connections. Even small gaps in the spoke link connections can lead to a manifold increase in the stabilization time of the system. The developed mathematical model makes it possible to consider various conditions for linking links, change the mass-dimensional parameters and materials of the spoke. The results of modeling are presented, showing the correctness of mathematical models. Conclusions are made about the admissibility of using mathematical models for spokes consisting of a larger number of links.


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