scholarly journals Justification of risk-based approach of operation of mobile agricultural equipment on example of details of separate units of tractors

2020 ◽  
Vol 11 (3) ◽  
pp. 173-179
Author(s):  
O. V. Voynalovich ◽  
◽  
S. M. Holopura ◽  
Keyword(s):  
Service Life ◽  
High Reliability ◽  
Limit State ◽  
Construction Materials ◽  
Flaw Detector ◽  
Agricultural Machinery ◽  
Acceptable Risk ◽  
Agricultural Equipment ◽  
Power Load ◽  
Kinetics Of

It is shown that in order to justify the extension of the service life of the machine beyond the resource set by the developers, it is necessary to focus on the allowable risks of accidents that can lead to accidents. After all, today for mobile agricultural machinery, the operation of which is associated with high-risk work, the concept of acceptable (acceptable) risk is not used, which does not allow to assess the danger of being on fields, farms and roads without machinery, with exhaustion of installed resources. The purpose of researches is to justify the permissible risk of exploitation of mobile agricultural machinery, in array of details and elements of constructions which have accumulated defects (damage). This paper analyzes the kinetics of accumulation of operational defects in the array of parts of individual components (systems) of tractors. MTZ-80 tractors (82) were chosen as the object of research, as one of the most common in Ukraine. To detect cracks, a developed eddy current flaw detector was used, the sensitivity of which allowed to find cracks several millimeters or larger in length without preparing the surface of the controlled parts. It is shown that the kinetic dependences of the accumulation of operational defects in the parts of tractor units in the analyzed range of service life are monotonically increasing, which can be described by exponential functions with a sufficiently high reliability. It is noted that the obtained dependences are similar to the kinetic dependences of the accumulation of static and dynamic (fatigue) damage obtained as a result of laboratory tests of samples of construction materials, which allows to use approaches to the criteria of the limit state of laboratory samples due to the power load to establish the boundary life of mobile agricultural machinery. However, the kinetics of the intensity of the occurrence of operational cracks in the array of tractor parts is not monotonous and has a maximum in the range of about 11-13 years of operation. This service life can be used as a criterion to stop the operation of the tractor, to carry out defectoscopy of parts and to replace defective parts. With such a long service life of the tractor, there is the greatest probability of sudden destruction of the tractor components and the creation of emergencies.

ON THE CREATION OF SECTORAL MACHINERY RECYCLING SYSTEM IN AGROINDUSTRIAL COMPLEX

1970 ◽  
pp. 69-72
Author(s):  
V. I. Ignatov ◽  
V. S. Gerasimov ◽  
N. О. Bogatova ◽  
Z. N. Mishina ◽  
М. S. Mordasova
Keyword(s):  
Service Life ◽  
Intelligent System ◽  
Limit State ◽  
Operating Time ◽  
Statistical Processing ◽  
Technical Condition ◽  
Secondary Market ◽  
Agricultural Machinery ◽  
Resource Saving ◽  
Agroindustrial Complex

The necessity of formation of resource-saving ekologiurad-based utilization system of agricultural machinery in agriculture was confirmed by studies conducted in the center FNAC VIM in 2013-2018 years during this period, information was collected about the structure of the charged parts of agricultural machinery (agricultural machinery) going to maintenance of the enterprise with the purpose of recycling. Qualified specialists of repair enterprises were involved in determining the status of parts of the utilized equipment, normative documentation and necessary equipment were used. Terms of operation were determined from the date of purchase until the receipt of the machine to the repair company. The obtained data were subjected to statistical processing in order to determine the effect of the terms of service on the technical condition of these items and determining the number of parts of different groups (in percentage) included in the utilized agricultural machinery, as well as one of the main factors for deciding the feasibility of recycling equipment. The aim of work is justification of alternative ecological oriented intelligent system “Selkhozretsikling” formation for realization of a new strategy of resources use connected with their reuse. The averaged dependences of the change in the coefficient of technical readiness for tractors and combines on their service life are determined. Making an informed decision about the appropriateness of further use the machine (repair or disposal), which is close (or reached) to the limit state depends on the accuracy and timeliness of receiving information about the level of loss of its fitness after a certain service life or operating time. As analysis showed in most farms (52%) the preparation of the components of wastes derived of operation technics allows to use their potential on secondary market. Theoretical works and legislative documents make it possible to carry out the necessary practical measures for the formation of a system for utilization of agricultural equipment.

Features and problems of formation of the system for utilization of agricultural equipment "Agricultural recycling" in AIC

2020 ◽  
pp. 69-78
Author(s):  
V. I. Ignatov ◽  
V. S. Gerasimov ◽  
D. V. Andreeva
Keyword(s):  
Service Life ◽  
Energy Supply ◽  
Industrial Complex ◽  
Technological Equipment ◽  
Agricultural Machinery ◽  
Agricultural Equipment ◽  
Complex Mechanization ◽  
Single Complex ◽  
Cattle Farms ◽  
Sown Area

In the agro-industrial complex of Russia, the share of the main types of agricultural machinery with a service life of more than 10 years is: for tractors — 61 %, grain harvesters — 47, forage harvesters — 42 %. Due to the extremely low provision of the Russian agro-industrial complex with modern tractors, the energy supply per 100 hectares of sown area is 150 hp. with technologically required 300–350 hp. On cattle farms, the level of complex mechanization of technological processes has decreased by 23 . Within the standard period, no more than 20–25 % of technological equipment is used and only 5–8 % meet modern requirements. The problem of updating the park of domestic agricultural machinery and livestock equipment can be considered only in a single complex with the disposal of these machines and equipment.

scholarly journals New directions for reinforced concrete coastal structures

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Steven Nolan ◽  
Marco Rossini ◽  
Chase Knight ◽  
Antonio Nanni
Keyword(s):  
Service Life ◽  
Prestressed Concrete ◽  
Composite Structures ◽  
Construction Materials ◽  
Design Guidelines ◽  
Coastal Structures ◽  
Frp Composites ◽  
The Us ◽  
Time Dependent Effect ◽  
Traditional Construction

AbstractWithin the last century, coastal structures for infrastructure applications have traditionally been constructed with timber, structural steel, and/or steel-reinforced/prestressed concrete. Given asset owners’ desires for increased service-life; reduced maintenance, repair and rehabilitation; liability; resilience; and sustainability, it has become clear that traditional construction materials cannot reliably meet these challenges without periodic and costly intervention. Fiber-Reinforced Polymer (FRP) composites have been successfully utilized for durable bridge applications for several decades, demonstrating their ability to provide reduced maintenance costs, extend service life, and significantly increase design durability. This paper explores a representative sample of these applications, related specifically to internal reinforcement for concrete structures in both passive (RC) and pre-tensioned (PC) applications, and contrasts them with the time-dependent effect and cost of corrosion in transportation infrastructure. Recent development of authoritative design guidelines within the US and international engineering communities is summarized and a examples of RC/PC verses FRP-RC/PC presented to show the sustainable (economic and environmental) advantage of composite structures in the coastal environment.

scholarly journals Thermal Stability and Kinetics of Formation of Magnesium Oxychloride Phase 3Mg(OH)2∙MgCl2∙8H2O

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 767 ◽  
Author(s):  
Michal Lojka ◽  
Ondřej Jankovský ◽  
Adéla Jiříčková ◽  
Anna-Marie Lauermannová ◽  
Filip Antončík ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Construction Materials ◽  
Simultaneous Thermal Analysis ◽  
Rietveld Analysis ◽  
X Ray Diffraction ◽  
Sustainable Building ◽  
X Ray ◽  
Kinetics Of Formation ◽  
Magnesium Oxychloride ◽  
Kinetics Of

In this paper, magnesium oxychloride cement with stoichiometry 3Mg(OH)2∙MgCl2∙8H2O (MOC 3-1-8) was prepared and characterized. The phase composition and kinetics of formation were studied by X-ray diffraction (XRD) and Rietveld analysis of obtained diffractograms. The chemical composition was analyzed using X-ray fluorescence (XRF) and energy dispersive spectroscopy (EDS). Furthermore, scanning electron microscopy (SEM) was used to study morphology, and Fourier Transform Infrared (FT-IR) spectroscopy was also used for the analysis of the prepared sample. In addition, thermal stability was tested using simultaneous thermal analysis (STA) combined with mass spectroscopy (MS). The obtained data gave evidence of the fast formation of MOC 3-1-8, which started to precipitate rapidly. As the length of the time of ripening increased, the amount of MgO decreased, while the amount of MOC 3-1-8 increased. The fast formation of the MOC 3-1-8 phase at an ambient temperature is important for its application in the production of low-energy construction materials, which corresponds with the challenges of a sustainable building industry.

scholarly journals OVERVIEW OF DISTANCE ENERGY TRANSMISSION MEANS FOR POWERING AGRICULTURAL MACHINERY TAKING INTO ACCOUNT FACTORS AFFECTING HUMAN SAFETY

2021 ◽  
Vol 4 (164) ◽  
pp. 10-13
Author(s):  
V. Halil ◽  
S. Zakurdai ◽  
V. Scurikhin ◽  
O. Donets ◽  
D. Zubenko
Keyword(s):  
Combustion Engine ◽  
Renewable Energy Sources ◽  
Electrical Energy ◽  
Electric Transport ◽  
Electric Motors ◽  
Agricultural Machinery ◽  
Transport Equipment ◽  
Agricultural Equipment ◽  
Electric Traction ◽  
The Impact

This article discusses the issues of autonomous operation of electrical agricultural equipment based on the transmission of electricity over a distance. The main point of this article is that tractors that work in the field are driven by electric motors, with the need to use expensive batteries. The issues of the impact and safety of this technology on the environment and humans are considered. The main problem of the creation, maintenance and operation of transport equipment, including agricultural equipment, is the high cost of maintenance and fuel, which are constantly increasing. In addition, the environmental problem, which has become so acute in recent years, global warming, the fuel crisis and the need to transfer all transport equipment to electric traction, make us look for new ways to solve the problem of environmental pollution and save resources, especially non-renewable energy sources. The use of electrical energy for traction of agricultural machinery that work in the fields or in other industries has been used for a long time, and in the early stages of the development of transport, it was electric transport that occupied the main part, before the invention of the internal combustion engine. Including at the Kharkov Tractor Plant there were developments (and still are), a prototype of the use of electric motors as the main unit for movement. Based on the above, it is obvious that electric traction for transport is obviously environmentally friendly and safe, although there are a number of limitations in this matter as well, but the unresolved problems of the limited use of the storage battery force us to look for new sources of energy. This article proposes to consider the possibility of using electric traction for agricultural machinery with the supply of operating tractors in the fields with the help of a directed electromagnetic wave with its transformation into electrical energy, which will be supplied to the electric motor.

scholarly journals Импортозамещение в отечественном сельхозмашиностроении как фактор повышения конкурентоспособности отрасли

2019 ◽  
pp. 67-88
Author(s):  
Наталья Коваленко ◽  
Андрей Чекунов
Keyword(s):  
Import Substitution ◽  
Domestic Market ◽  
The State ◽  
Industrial Complex ◽  
Agricultural Machinery ◽  
State Support ◽  
Agricultural Engineering ◽  
Agricultural Equipment ◽  
Long Time ◽  
Effective Development

Статья посвящена анализу и оценке мер государственной поддержки импортозамещения в национальном сельхозмашиностроении. Рассматриваются ход и результаты государственной поддержки импортозамещения в отрасли, недостатки, эффективность. Предложены шаги, способные повысить эффективность государственной поддержки импортозамещения в сельхозмашиностроении Российской Феде-рации. Effective development of domestic agricultural engineering ensures the achievement of high production volumes of agri-food products. To improve the national production of agricultural machinery, the leading countries of the world provide state support to their pro-ducers. At the same time, these countries stimulate the development of the industry in order to dominate their producers in the domestic market, and to expand into the markets of foreign countries. For a long time, Russia has been the object of widespread expansion by foreign manufacturers of agricultural equipment. At the same time, under the conditions of economic sanctions, dependence on im-ported agricultural equipment limits the development of the domes-tic agro-industrial complex. Significantly reduce dependence on foreign supplies of agricultural equipment and ensure the competi-tiveness of domes- tic products should be implemented in the indus-try's current policy of import substitution. The purpose of the article is to analyze the implementation of the policy of import substitution in domes-tic agricultural machinery and assess its impact on the development of the industry. Government sup-port has a significant impact on the development of the industry, which is confirmed by statistical data and materials of market participants. Analysis of the literature and regulatory acts showed that the state financial support for the industry is carried out in 4 areas: industrial, technological, marketing and personnel. The effectiveness of state support is determined by the state of the industry, the situation on the domestic market of agricultural equipment and the achievement of support goals. To date, govern-ment support measures for import substitution in the industry have not ensured its stable development and increased competitiveness of the products produced. The authors analyzed the implementation of the state policy of import substitution in the domestic agricultural machinery in the framework of the relevant sectoral plan. Based on the analysis, a conclusion was made about the need to improve measures of state support for the industry.

Research of the kinetics of thickness of the boundary layers of lubricating materials applied to drilling technology

2021 ◽  
pp. 115-120
Author(s):  
R.A. Ismakov ◽  
◽  
V.G. Konesev ◽  
F.N. Yangirov ◽  
G.L. Gaymaletdinova ◽  
...  
Keyword(s):  
Service Life ◽  
Boundary Layers ◽  
Friction Pair ◽  
Roller Bearing ◽  
Equipment Safety ◽  
Efficiency And Effectiveness ◽  
Drilling Technology ◽  
Resource Characteristics ◽  
Friction Surfaces ◽  
Kinetics Of

Improving the operational properties of lubricants increases the service life of the mechanisms and increase the durability of rubbing joints, which has a positive effect on the indicators of technical and economic efficiency and equipment safety. Therefore, great attention in tribology is paid to the analysis of the state of friction units in technology and the assessment of their resource characteristics, which makes it possible to increase their service life. The research aim is to study the general provisions on lubricants and lubricants, as well as the features of the boundary layers formation on friction surfaces and the observed patterns. Calculations of the boundary layers thickness using lubricating reagents at different energetic loading of the friction pair were carried out as applied to the roller bearing of a roller cone bit in the medium of cylinder oil 52 and DPS grease. The proposed research methodology made it possible to in-crease the efficiency and effectiveness of the means development for improving the tribotech-nical properties of drilling lubricants.

scholarly journals Modelling the process of technical re-equipment of the MTF with the simultaneous selection of the optimal plan for its operation on the farm

2020 ◽  
Vol 175 ◽  
pp. 13007
Author(s):  
Arthur Alukhanyan ◽  
Olga Panfilova
Keyword(s):  
Service Life ◽  
Optimal Strategy ◽  
Scientific Management ◽  
Agricultural Machinery ◽  
Main Criterion ◽  
Optimal Plan ◽  
Important Prerequisite ◽  
Optimal Service ◽  
Simultaneous Selection ◽  
Selection Of

The article deals with the issues of renovation (renewal) of the agricultural machinery and tractor fleet by developing models for developing an optimal strategy for its technical re-equipment. The optimal service life of machines in operation is considered as the most important prerequisite for the scientific management of such an update. The main criterion for the optimal strategy is the effectiveness of replacing a particular machine with a new one. The relevance of solving this problem is determined by the urgent need to plan the pace of technical re-equipment of the MTF, taking into account the presence of various economic restrictions.

scholarly journals Welding materials used to increase service life of agricultural machinery processing soil

2018 ◽  
Vol 244 ◽  
pp. 01002
Author(s):  
Petr Hrabě ◽  
Viktor Kolář ◽  
Abraham Kabutey ◽  
Aleš Sedláček
Keyword(s):  
Service Life ◽  
Abrasive Wear ◽  
Soil Treatment ◽  
Agricultural Machinery ◽  
Wear Resistant ◽  
Welding Material ◽  
Increase Service Life ◽  
Materials Used ◽  
Welding Materials

Intensive abrasive wear occurs in soil-treatment machines. This article is focused on increasing the service life of ploughs by the welding material. The welding material is applied at a 45° angle to the tool. This material is abrasive wear resistant. The welding material was applied parallel to the head of ploughshares with spacing of 60 mm. Carbide materials were used (SK 258 TiC-O, SK 900-O, SK A43-O, SK 299- O, SK A45-O, OK TUBRODUR 15.82, SK 258 TiC-O). The tested ploughshare variants were wearing the same when were used the welding material and the standard.

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