bluuebunny/crossref_metadata_2025 huggingface dataset:
Determining the structure of an automated system to optimize the design process
Authors: Khakimov A V , Markelov V V , Kostishin M O , Zharinov O O
Published: December 2019

This article presents the current process of designing automated systems assigned for computer-aided design. The basic mission of constructing such systems depending on the type of design tasks is described. An example of the problem of designing the upper level of the primary look of the aircraft avionics complex is given. The main tasks for which automation is identified are allocated and the need for the optimization process is defined. The affiliation of the presented problem to the type of existing optimization problems is determined. Criteria for optimizing the design of complexes taking into account the main requirements of customers are given. The possible result of the automated design system to optimize the process is presented. Conclusions on optimization are made, and the prospects for developing such an automated system during the design work on the development of aircraft avionics complexes are justified.
Dependence of strength properties of electrolytic сoatings on their substructure
Authors: Kisel Yu E , Guryanov G V , Bezik V A , Bezik D A , Kaminin V V , Dmitrieva N V
Published: December 2019

The dependences of strength properties of iron coatings on the parameters of the microstructure of the metal during electrodeposition and heat treatment, characterized by dilatation, are established. The impact of high-temperature effects on the strength and structure of coatings is investigated. It is shown that dilatation can be used as a control parameter of the strength properties of iron.
Exergy pinch analysis of the primary oil distillation unit
Authors: Yushkova E A , Lebedev V A
Published: December 2019

The article is devoted to the issue of thermodynamic optimization of an oil refinery. Optimization is carried out by the exergy method of thermodynamic analysis, which allows you to take into account the quantitative as well as qualitative characteristics of thermal processes. The research uses the principles and rules of pinch analysis. Thus, the article discusses the task of optimizing oil refining processes using the pinch analysis method using exergy. The objective of the article is to increase energy efficiency by reducing exergy losses in technological processes of oil refining. The results of the study allow us to determine exergetic losses and propose measures to reduce them.
Research results of anti-wear properties of mineral and semi-synthetic motor oil
Authors: Kovalsky B I , Lysyannikova N N , Bolshakov A S , Lysyannikov A V , Kravtsova E G , Egorov A V
Published: December 2019

The object of research is influence of temperature and destruction products on boundary layers formation located on rubbing parts. There are research results of anti-wear properties of mineral and partially synthetic motor oil using methods for determining parameters such as absorption coefficient of the light flux, viscosity, and friction parameters. As result there is analyze of experimental data, absorption curve, that are showing anti-wear properties of lubricants, also proposed criterion that is showing concentration of destruction products on the nominal area of friction contact.
Investigation of material properties for polymer-based microwave devices
Authors: Cherukhin Iurii , Zander Felix V , Dashkova Alena K , Guo Yong Xin
Published: December 2019

This work demonstrates that the molding technique for polymer-based flexible microwave electronics with various polymers in order to evaluate acceptable boundaries for conductivity and tan loss. Performance evaluation has been done on the microstrip line and patch antennas with and without material improvements. We have demonstrated that improvements in conductivity after 106 S/m do not give significant benefits. The attenuation in microstrip lines has been reduced from 0.16dB/cm to 0.05dB/cm. However, reduction in the tan loss is able to boost antenna gain from 4.2dBi to 6.5dBi.
Cutting tool for turning large workpieces
Authors: Khalimonenko A D , Timofeev D Yu , Golikov T S
Published: December 2019

The article analyzes the existing methods of cutting-off large-size workpieces on turning machines and tools of various constructionы for cutting-off operations. The analysis has shown that the process of cutting-off in comparison with the usual processes of operation takes place in the most difficult conditions. In this regard, a new design of cutting tool with a special scheme of fixing a double-sided replaceable cutting insert was proposed.
Method of assembly and adhesive technological equipment automated design
Authors: Meshihin A A , Polyanskov Y V , Zheleznov O V
Published: December 2019

In the production of modern aviation equipment, special attention is paid to reducing the mass of its components and assemblies. To achieve a reduction in aircraft mass without compromising strength and increasing economic efficiency, various composite materials are often used. The manufacture of components and assemblies from such materials entails the design and use of special assembly and adhesive equipment, which provides the necessary accuracy and rigidity to obtain the desired geometric shape of the aircraft structure. This article is devoted to the process of computer-aided design of assembly and adhesive technological equipment for the manufacture of aircraft cellular metal panels from polymer composite materials, using a Siemens NX CAD system.
Diffusion metallization of carbide cutting tools as a way to improve the surface treatment quality
Authors: Bobylyov E E , Storozhenko I D
Published: December 2019

The application of diffusion nicke-copper coatings on hard alloys leads to an increase in the durability of carbide-tipped cutting tools when machining even hard carbide-containing steels at the high cutting speeds, which improves the productivity of the machining process. The analysis of the influence of deposition of nicke-copper coating by the diffusion metallization from environment of the fusible liquid metal solutions at the resistance of alloy carbide inserts of type WC-Co and TiC-WC-Co, and to the quality of the processing of hard alloy high viscosity has been performed.
Improvement of wear resistance of austenic steels by applying of carburization and diffusion saturation in liquid metal media solutions
Authors: Sokolov A G , Bobylyov E E
Published: December 2019

The technology of the increase of wear resistance of austenitic steel products by combining the technologies of carburization and diffusion alloying in the medium of fusible liquid metal solutions has been described. The preliminary and subsequent carburization led to increase of surface layers microhardness of coated material to 5600 MPa. At the same time, the depth of the doped layer can reach 420 microns.
Control of the technological process of the waveguide paths induction soldering in the framework of Industry 4.0
Authors: Tynchenko V S , Milov A V , Bukhtoyarov V V , Kukartsev V V , Tynchenko V V , Bashmur K A
Published: December 2019

The control of the induction soldering technological process is significantly complicated by the presence in the heating zone of physical phenomena that make it difficult, and sometimes completely impossible, to measure the temperature in the heating zone using non-contact temperature sensors. At the same time, the use of contact sensors is also difficult in the production of spacecraft’s elements due to the high requirements for the quality of the product surface, as well as the high time required for the installation of contact sensors and the human factor. This paper presents the concept of a cyber-physical system for controlling the technological process of induction soldering of spacecraft waveguide paths in the framework of Industry 4.0, which is actively developed at the enterprises of the rocket-space complex. As a part of this concept implementation, it is proposed to develop mathematical models for each element of the waveguide assembly separately, and for the entire assembly of the waveguide path. The use of mathematical models developed within the framework of this concept will make it possible to improve the quality of the induction heating process control using adaptive and intelligent methods.
The use of adaptive matching circuits to adjust the impedance of high-frequency loads
Authors: Samoylov A G , Samoylov V S , Samoylov S A
Published: December 2019

The article discusses methods for matching high-frequency oscillators with variable load. Adaptive impedance tuning methods are described. The results of the experiments are presented. Shown, that losses of high-frequency energy by its transfer to variable loading decrease more than by 10 dB.
Automated detection of deforestation based on multi-spectrum satellite data
Authors: Mozgovoy D K , Svinarenko D N , Leong Y R , Zhigalov K Y , Tsarev R Y , Yamskikh T N , Bystrova N V
Published: December 2019

A brief description and the results of experimental testing of a technique for automated processing and analyzing multispectral satellite images of medium and high spatial resolution with the aim of detecting and assessing the dynamics of large logging areas in the territory of the Republic of Kazakhstan are presented. More than 50 large logging areas of about 100 hectares were detected in the selected monitoring site (district of Kokshetau, Akmola territory).
Deep learning and its role in smart agriculture
Authors: Magomadov V S
Published: December 2019

Deep learning is a data analysis and image-processing method, which has recently gained a lot of attention as a tool, which has great potential and promising results. There are many different fields that deep learning has been applied to and it is also being applied to the field of agriculture. The purpose of this paper is to explore deep learning in terms of agriculture and food production. The performance of deep learning in agriculture is the focus of this paper comparing it to other existing artificial intelligence models, which have been used in agriculture. In addition, several types of deep learning models are covered and their differences are explained. The paper explains why some deep learning models are better equipped to be used in the field of agriculture than other models.
Disk brake contact analysis utilizing Ansys
Authors: Magomedov I A , Magomedov A A , Magomadov V S , Tahaev U R , Alikhadzhiev S Kh , Ibragimova L V
Published: December 2019

the following work looks into contact analysis of braking system using Ansys software. The work starts from brief introduction and literature review on squeal propensity problem. Coefficient of friction variations between pads and disc of braking system were analyzed to gather information on pressure distribution. Results of the analysis illustrated that by increasing coefficient of friction tendency of pressure distribution will shift toward leading edge.
Modeling heat transfer in a well network
Authors: Feodorov A B , Afanasov V I , Lunev A S , Spirin T S , Kurochkin E S , Zagorulko A J
Published: December 2019

Model representations are used to analyze the technological process of alternating the appointment of wells. The role of producing and injection wells alternates. The purpose of this technology is to reverse heat fluxes. Changing the direction of heat fluxes is a way to preserve the phase state of frozen soils. The development of hydrocarbon deposits in the extreme north requires the preservation of perennial frozen soils in a solid state. These are safety requirements. In an injection well, it is easier to build a process for injecting refrigerant into the top of the well. When using packers to separate the indicated portion, the process of pumping water to maintain reservoir pressure may continue in the usual manner. Packers are installed on the lower boundaries of frozen soils. Perennial frozen soils are cooled an order of magnitude slower than heating. It is promising to use rock fracturing and faults to penetrate the refrigerant. Normal refrigerants are used. Gaseous refrigerants are preferred. After the heating stage of adjacent rocks, they have increased permeability. The product of thermal reverse uses this circumstance. Refrigerant penetration is simplified. And in turn, it leads to blockage of the formed network of microchannels. The convection method of heat exchange is cut off. The convection heat transfer process is responsible for most of the heat fluxes. A sharp change in heat fluxes occurs immediately after the reverse. The proposed technology allows you to use an additional option for the operation of the existing layout of wells in the oil and gas field. The usual practice of the operation of the fishery may remain without noticeable changes. Using existing gas preparation equipment simplifies the implementation of the technology.
Mathematical model of adhesion junction of layers during coextrusion
Authors: Dyadichev A V , Dyadicheva E A , Kolesnikov A V , Dyadichev V V , Menyuk S G , Chornobay S Ye
Published: December 2019

Nine theories of polymer adhesion during coextrusion are researched. Two approaches to describing adhesion are presented – thermodynamic and molecular-kinetic ones. The factors, determining the durability of adhesion junction, are analyzed. The stages of adhesion connection formation are presented. The adhesion junction emergence model as a result of intermolecular interaction is described. As a result of calculations the following dependencies are got: the dependence of ply separation energy on the contact length of polyisobutylene adhesion junction of different molecular weight, the dependence of ply separation energy on molecular weight of polyisobutylene adhesion junctions got during different time, the dependence of adhesion durability on squared difference of polymer solubility parameters, the dependence of interdiffused zone width in the time.
Technological features of aircraft engine repair in digital production
Authors: Bolotov M A , Grachev I A , Kudashov E V , Pechenin V A , Pronichev N D
Published: December 2019

The article analyzes the problems arising during the repair of gas turbine engines. Based on the analysis of problems, a gas turbine engines rotor repair scheme is proposed using virtual assembly technology. The proposed scheme will allow to reduce the cost and to increase the efficiency of repair work. Example of gas turbine rotor repair using virtual assembly technology is considered. The results of predicting the dimensional accuracy of assembly parameters based on the simulation of parts with real geometry are presented.
Chemical reactions at high-speed HFC-boriding
Authors: Ishkov A , Malikov V
Published: December 2019

Strengthening of machine parts and units, increased reliability and longer service life is an important task of modern industry. As promising materials for protective-strengthening coatings, matrix composites based on the ternary system Fe-B-FenB are offered. The article proposes the complex heating of steel being borated and imbued medium by high frequency currents (HFC). We also proposed to combine the diffusion boriding from liquid and solid media and the transition of the diffusion boriding to chemical interaction between the elements of Fe and B. We determined the main components of the reaction-boronizing system, as well as their roles and possible processes that lead to the implementation of topochemical boriding initiated by HFC-heating. We confirmed the course of the reaction leading to the occurrence of reducing agents Ca, Si and active boron in the boronizing mixture.
Spectral characteristics and biological activity of synthetic humic-like substances on the basis of carbohydrates
Authors: Cherepanov I S
Published: December 2019

The study of the structure and properties of synthetic analogues of humic substances is an important research task. This paper presents the results of studying the structural and group composition of the products of water-soluble fractions synthesized in the D-glucose - m-aminobenzoic acid and D-glucose - p-toluidine reaction systems using electronic and vibrational spectroscopy. The IR-Fourier transform spectroscopic study shows the similarity of the structural-group composition of the selected products with those for humic and humic-like substances of different origin. The study of growth-regulating ability confirms its presence for the products of both systems, while the aromatic fragments of m-aminobenzoic acid impart higher stimulating activity to the substances. Analysis of the structural-group composition of the products obtained in the framework of computer modelling suggests their potentially non-toxic nature, which makes further research in this direction promising.
A method of reducing the amount of fuel gas during operation of the oil fire furnaces
Authors: Shram V G , Shushenacheva M A , Kovaleva M A , Lysyannikova N N , Lysyannikov A V , Kravtsova E G
Published: December 2019

The rational use of resources and energy in the oil refining process is largely determined by the efficiency of the technological equipment. In the conditions of the Far North, with a sharply continental climate, at low negative temperatures, the operation of technological furnaces is carried out with very high energy consumption, which indicates the use of equipment in suboptimal conditions. Loss reduction is possible due to heat recovery through the use of heat from combustion products, through heat exchange between product streams and the use of low potential waste heat. In this work, an analysis of the operation of a technological oil heating furnace was carried out, the main parameters affecting the consumption of fuel gas were identified, a method for reducing the cost of natural fuel gas by introducing a recuperator was proposed.
Prediction life of lubricants on the analysis of experimental data on their optical density
Authors: Shram V G , Agafonov E D , Lysyannikov N N , Lysyannikov A V , Kovaleva M A
Published: December 2019

The paper presents the results in the field of research and analysis of the optical density of motor oil using mathematical and intelligent models. The quadratic approximations of the dependence of optical density on time are obtained for three different temperatures of temperature control. It is established that each curve of the change in optical density with time contains an inflection point. On the basis of which it was hypothesized that these moments correspond to a certain phase transition in the oil under study. A three-dimensional model of dependence of the rate of change of optical density on temperature and test time was also constructed. When analyzing this dependence, the character of the inflection curve is established, which is proposed as an indicator indicating the attainment of the limiting resource of lubricating oils.
Efficiency of using solar electric panels with grid-tie inverter for public buildings
Authors: Platonova E V , Chistyakov G N , Toropov A S , Kolovsky A V , Bayshev A V
Published: December 2019

It is shown that the operation of solar electric panels in the Republic of Khakassia of the Russian Federation should be carried out without power output to the grid. The scheme of connecting a solar power station to an existing building network and power station equipment were selected. A methodology for calculating the power of the inverter and solar panels was developed and applied based on the building’s electric load schedule. Electricity rates for public buildings were analyzed. The discounted payback period for the use of a solar power station in parallel with the power grid was calculated. The applicability of solar panels operating in parallel with the power grid for public buildings of the Republic of Khakassia of the Russian Federation was revealed. Conclusions are made based on research results.
The results of the study of the mechanism of oxidation of motor oil
Authors: Kovalsky B I , Shram V G , Bezborodov Yu N , Petrov O N , Lysyannikova N N , Kravtsova E G
Published: December 2019

The results of the study of the oxidation and evaporation of a partially synthetic Total Quartz 10W-40 SL/CF synthetic engine oil in the temperature range from 160 to 190 °C are presented. The rates of increment of the processes of oxidation and evaporation from the time and temperature of the test, as well as the critical temperatures and temperatures of the onset of these processes, are determined. A grapho-analytical model for predicting thermal-oxidative stability indicators in a wider temperature range of test temperatures is proposed.
Wave formation in a two-layer liquid under the action of a source
Authors: Mikishanina E A
Published: December 2019

The article is devoted to the construction of an analytical algorithm for solving the problem of the formation of waves in a two-layer liquid from a source located in the upper layer. In the course of the solution, the problem is reduced to a boundary value problem for a system of differential equations with respect to the velocity potentials of the perturbed flow of liquids, which was divided into three simpler boundary value problems. Expressions characterizing the evolution of the free boundary and the line of separation of media were also obtained. Conclusions are drawn about the influence of density difference, layer depth and power of the source on the wave formation process.
The method of accident reconstruction according to the parameters of the braking process of M1 category vehicle under the conditions of the North-West region
Authors: Afanasyev A S , Evtyukov S A , Chudakova N V
Published: December 2019

The article analyzes the number of accidents and measures that implement the reduction of mortality on the roads. The authors proposed a set of factors that must be taken into account when reconstructing an accident according to the parameters of the braking process of M1 category vehicles, such as: the actual load of the vehicle, modern complexes of car active safety systems (ABS, EBD, ASR, BAS), a trailer of up to 750 kg, the condition of the road surface coverage and seasonality of tires in the conditions of the North-West region. The results of experimental studies of the actual values of the steady-state deceleration and its rise time are presented, confirming the regularity of the influence of the studied factors. Coefficients have been developed that correct the recommended normative values of steady-state deceleration and rise time. The method of accident reconstruction according to the parameters of the braking process of M1 category vehicles is proposed, which allows more objective and reliable expert research and provides the ability to establish real cause-effect relationships for the occurrence of accident.
Improving the environmental performance of a diesel engine using natural gas and exhaust gas recirculation
Authors: Likhanov V A , Lopatin O P
Published: December 2019

The study of the environmental performance of diesel engines running on natural gas in a wide range of operating conditions is relevant for the further implementation of their transport and transport-technological machines. The paper deals with the use of natural gas as an alternative fuel to improve the environmental performance of a diesel engine. The results of experimental studies on the effect of natural gas and exhaust gas recirculation on the toxicity and smokiness of diesel engine exhaust gases are presented. It is noted that when the diesel engine is running on natural gas with exhaust gas recirculation, the content of nitrogen oxides (NOx) in the exhaust gases decreases by 43.2%, soot (C) by 5.6 times, carbon dioxide (CO2) by 33.3%, carbon oxides (CO) by 10.0%.
Numerical investigation of the ethylbenzene dehydrogenation reaction in a fixed bed reactor with catalyst granules of various sizes
Authors: Solovev S A , Soloveva O V , Gilmurahmanov B Sh , Lamberov A A
Published: December 2019

In this work, we get a numerical simulation analyzes the effect of catalyst granule size on the operation efficiency of the fixed bed reactor for the dehydrogenation of ethylbenzene to styrene. For the laboratory reactor, we built a detailed model of cylindrical catalyst granules with a length of 3 mm, 6 mm and 9 mm. We carried out an analysis of the granule size effect on the bed characteristics, such as porosity and the catalyst total surface area. We obtained results for a wide range of feed gas rates. The ranges and rates of the catalyst efficiency decrease for different feed gas rates are determined.
Determination of the mutual entrainment of the extractant and the aqueous phase in the extraction of rare-earth elements from the technological phosphoric acid solution
Authors: Lutskiy D , Cheremisina O , Ponomareva M , Ignatovich A
Published: December 2019

The data on the distribution of orthophosphoric acid in the system di - (2-ethylhexyl) phosphoric acid (D2EHPA) – H3PO4 – H2O was obtained. The mutual losses of the extractant and the aqueous phase in the extraction of rare-earth elements occur from phosphoric acid using D2EHPA. The quantitative characteristics of redistribution between the aqueous and organic phases was determined. The composition of solvates in extracts was established at different equilibrium concentrations of orthophosphoric acid in the aqueous phase. The obtained data allow us to make changes in the technological process, which will allow us to obtain cleaner REEs after extraction and reduce the concentration of extractant in water effluents.
Concept of control and data acquisition system for modern digital power substation
Authors: Dmitriev A A , Gerasimov V E
Published: December 2019

The article deals with the issue of standardization of approach to definition of modern digital substation is considered. The approaches proposed and partially implemented by equipment manufacturers are described, such as data collection and processing by means of relay protection and automation with the use of proprietary algorithms, wireless and optical current and voltage sensors, etc. The authors propose the use of a unified system for collecting and processing data generated and used in the operation of an electric substation. The structure of the signal transmission system for the main groups of electrical power equipment is described, the requirements for the predictive diagnostics system that allows maintaining the equipment based on its technical condition are described.
Determining the number of redundant elements of the distribution network in compliance with the specified amount of information entropy
Authors: Dulesov A S , Karandeev D J , Khrustalev V I , Dulesova N V , Krasnova T G
Published: December 2019

A mathematical economic model for searching an optimal solution is proposed. In addition, a measure of information uncertainty is proposed to solve the problem the construction of a distribution network structure with the redundancy. In the model, there is an objective function for searching minimum costs and the equations for determining an information entropy of operable and non-operable states of the distribution network. The equations are based on the approaches of Ralph Hartley and Claude Shannon for entropy determination. An important place in the mathematical model is the process of constructing of a constraint function to search an optimal solution. The right part of constraints is entropy, its value reflects requirements to provide the required reliability level of power supply of the consumer. The left part is used to determine the connection entropy between an energy source and the consumer. An example of determining the number of redundant elements is offered.
Study of the solubility of antracene in pure and modified supercritical carbon dioxide
Authors: Khazipov M R , Pastushenko I L , Sagdeeva G S , Sagdeev A A , Galimova A T
Published: December 2019

In the framework of the supercritical fluid extraction regeneration of catalysts, an original experimental device was created for measuring the solubility of substances in pure and modified supercritical carbon dioxide, protected by a RF patent for a useful model. To prevent entrainment during the implementation of the process of extraction of substances in the solid state, a special vessel with a microporous membrane was used in the extraction cell. The solubility of anthracene in pure supercritical carbon dioxide was studied with 423, 435, 448 K isotherms in the pressure range from 9.6 to 22 MPa. It is established that an increase in temperature and pressure contribute to an increase in the solubility of anthracene. In order to increase the dissolving ability of SC-CO2, a search for modifiers of various nature (acetone, hexane, ethanol) was conducted. It is revealed that hexane and ethanol are more effective modifiers. In this regard, the effect of the concentration of these modifiers on the dissolving ability was investigated. The content in the solvent 2% of the mass. hexane and ethanol have a maximum effect than their other concentration. The solubility of anthracene in SC-CO2 modified with hexane and ethanol was studied at a 435 K isotherm in the pressure range 10-20 MPa. The use of modifiers made it possible to increase the solubility of anthracene using ethanol and hexanan by 56% and 76%, respectively. The solubility of anthracene in pure supercritical carbon dioxide is described using the Peng-Robinson equation of state and three adjustable parameters. To describe the solubility of anthracene in a modified SC-CO2, only one adjustable parameter was used. In addition, the descriptions of the solubility of anthracene in pure SC-CO2 obtained experimentally in this work and in the works of other authors are presented. The obtained dependences of the parameters of the binary interaction on temperature make it possible to interpolate the values of solubility on the basis of existing experimental data.
Study of microrelief forming technology on sliding bearings for oil and gas centrifugal units
Authors: Petrovsky E A , Bashmur K A , Shadchina Yu N , Bukhtoyarov V V , Tynchenko V S
Published: December 2019

The present paper is dedicated to improving the quality, reliability and operational characteristics of machines that is a major challenge for modern oil and gas engineering. Improving the quality of machines, increasing their reliability and durability is inextricably linked with the issue of enhancing the parts surface quality as virtually all operational parts properties are determined by certain geometric and physical-chemical parameters of their working surfaces. In particular, there is a known way to increase the reliability of supports of centrifugal units when sliding bearing supports with a regular microrelief are used. In particular, there is a known way to increase the reliability of bearings of centrifugal units when sliding bearing bearings with a regular microrelief are used. When researching the planetary rotary turning the tool is given additional movement - planetary rotation, it is found out that the complicated movement of planetary rotary turning provides an emerging various regular microreliefs on the surface of the parts that can be effectively applied to sliding bearings. The article focuses on the study of the kinematics of this relief by planetary cutting tools.
Self-contained process module with flow swirling for downhole equipment power supply
Authors: Bashmur K A , Petrovsky E A , Shadchina Yu N , Tynchenko V S , Tsygankova E V
Published: December 2019

The present paper is dedicated to the development of resource-saving technologies for oil and gas complex, namely to the development of power supply for downhole equipment. The relevance of this research is caused by the acute lack and high electricity costs for downhole devices which are widely-used both in drilling and in hydrocarbon production. The traditional methods used to power these devices, namely batteries and power cables are unreliable and short-lived and they require capital and time expenditure for production process, tripping operations, etc. shutdowns. There is a solution to this problem consisting in use of autonomous downhole power supply system including a hydrodynamic module with an electric power generator which converts well flow energy. An assessment of the device operability was made in which its high performance is highlighted.
Processing capabilities of reducers with eccentric gearing for rotary drilling rigs
Authors: Petrovsky E A , Bashmur K A , Geraschenko Yu A , Tsygankova E V , Bukhtoyarov V V
Published: December 2019

The present paper is dedicated to assessment of possibilities for using reducers with eccentric involute gearing in the system of the drilling rig top drive. Modern problems of top drive systems, in particular disadvantages of applied reducers are considered. The kinematics of eccentric gears is investigated; the main characteristics of the proposed gearing are calculated. High gear ratios and efficiency of the mechanism with its low weight and dimensions are revealed.
Regularities of change of energy indicators of the basic technological equipment of the cotton-cleaning industry
Authors: Rakhmonov I U , Reymov K M
Published: December 2019

The article discusses the change in electrical loads and specific power consumption during the processing of various varieties of raw cotton. A method of evaluation changes in energy indicators and the influence of normative factors and identifying reserves of energy savings is attached. The most favorable modes of operation of the main technological equipment from the performance of power-consuming objects have been evaluated by using the Chebyshev method. As an example of the implementation of the proposed method, calculations have been performed at the Peshku cotton processing plant in the Bukhara region.
Research of textural and structural features of refractory gold-bearing ores
Authors: Gron V A , Korostovenko V V , Galaiko A V , Sukhanova A V , Gron M S
Published: December 2019

The article studies the material and mineralogical composition of the refractory gold-bearing ores of the weathering crust of one of the deposits in Eastern Siberia. It is revealed that, according to the textural and structural features, ores are multi-mineral and have significant differences in the composition of the detrital, granular material and the loose component. All ore is saturated with iron hydroxides and limonite crusts with clay components. The results of the analysis showed that large classes contain an insignificant amount of a valuable component. Increased gold content is noted starting from -4 + 0 mm size. In the free state are about 3-5%. Processing of these types of raw materials is a rather complicated task. Analysis of the enrichment methods showed that the use of new solvents of noble metals with their subsequent concentration is promising. Of practical interest are alkaline solutions obtained by dissolving sulfur in an aqueous suspension of calcium hydroxide. The reagent is non-toxic and environmentally friendly. Leaching was carried out in a wide range of concentrations of the solvent used. The optimum solvent concentrations and the duration of the leaching process for extracting the valuable component into the filtrate were determined to be 97–98%. Chemical analysis of cakes showed that the reagent does not enter into chemical interaction with other elements that make up the ore. As well as the content of elemental sulfur in dump cakes averages 0.64%, that is, it corresponds to a content in the raw material of up to 0.8%. At the same time, cakes are not environmentally harmful and can be stored on special platforms.
Low-intensity vibration impact on a low-permeable coal seam
Authors: Pavlenko M V , Arnautov A D , Tsarev R Y , Orlova V V , Kartsan I N , Zhigalov K Y
Published: December 2019

With a sufficiently high level of degassing works in the mines of a number of coal basins, their effectiveness is constrained by specific properties of the coal seams being mined. In particular, the filtration and reservoir properties of fossil coal differ significantly, in natural conditions, even within one coal seam. The article outlines the purpose of the new method, namely, the vibration impact on the coal seam to increase fracturing and as a consequence of increasing the gas recovery intensity. In this way, when mining a low-permeable gas-saturated coal seam, the gas recovery rate is very low due to the physical state of the array. Existing methods create insufficient conditions for the degassing of coal seams. Therefore, to increase the efficiency of the coal array it is required to create new, more efficient ways to crack open fractures and increase gas recovery from coal. This is achieved by applying vibration to a low-permeable gas-bearing coal seam.
Combined heat and power
Authors: Bamatov Ibragim M , Bamatov Dzhabrail M
Published: December 2019

This research illustrates the co-generation process of electricity and fresh water (H2O) through the application of combined distillation power plants producing very high efficiency for the electricity generation and the available utilization of waste energy. Consequently, it increases the power of low temperature multi-stage distillation plants. This project is about Combined Heat Power (CHP) distillation process that gives the best environmental effect for the reduction of carbon dioxide (CO2) gases, which effects in water prices and yields pure water from the distillation process. Besides, this report includes economical and practical factors, which are taken with consideration of the feasibility of CHP. The factors affecting within choose of the power plant and the overall system economics are additionally discussed and analysed.
The use of magnetic flaw detection to control the offset of the edges of the welded joints of technological pipelines
Authors: Naumkin E A , Rubtsov A V , Kulakov P A , Usachev K A
Published: December 2019

The task was set of developing recommendations for identifying areas of displacement of the edges of the welded joints of abutting pipes, as well as identifying potentially dangerous sections of welded joints of technological pipelines by changing the normal component of the constant magnetic field. For research, 24 pipe fragments made of steel 20 with a length of 45 mm each were selected. The authors developed recommendations for identifying the presence and zone of displacement of the edges, as well as identifying potentially dangerous sections of welded joints of technological pipelines using the flux-gate control method. It is proposed to use the obtained maximum values of the normal component of the constant magnetic field for the objective detection of edge displacement zones and the determination of potentially hazardous areas. It was shown that the normal component of the constant magnetic field, is quite sensitive both to the displacement of the edges of the welded joints of the pipes and to the quality of the weld, its geometry, defectiveness and determines the above indicators with various characteristic values.
Purification of harvested tree stumps by means of pulse swirling hydraulic jets
Authors: Polyanin I A , Nikonorov K N , Egorov A V , Voldaev M N , Lysyannikov A V , Kaizer Yu F , Stepanova K S
Published: December 2019

The article deals with the separation of soil, bark and rot from the surface of the tree stump before its further use in the production of turpentine and rosin. Developed and manufactured installation for experimental studies of the operating parameters of pulse swirling jets of liquid under the influence of the treated tree stump. In general, the dependence between the parameters of the pulse swirling liquid jet and its impact on a stationary object is revealed. In general, the dependence of the influence of the initial parameters of the pulse swirling hydraulic jets on the width of the treated surface of the harvested stump when removing soil, bark and rot is established. The convergence of theoretical and experimental data for determining the width of the treated surface of the harvested stump by pulsed swirling jets of liquid is estimated, the maximum divergence of 3.0 % in determining the width of the treated surface when removing rot.
Improving the energy performance of ozone generators used in agricultural ecology
Authors: Radjabov A , Ibragimov M , Eshpulatov N M , Matchonov O
Published: December 2019

In order to improve the energy characteristics for low-power ozone generators, it is proposed to use a continuous discharge burning mode. It is due to a significant phase shift between the currents and voltages on the ozone generator. Conditions for conducting the continuous discharge mode were identified.
Possible use of processed ferromanganese concretions for production sewage purification
Authors: Sulimova M A
Published: December 2019

This article describes a possible scenario for ferromanganese concretions usage as a sorbent for purification of wastewater obtained from mining enterprises. To study the chemical and physicochemical properties of iron-manganese nodules, the methods of tomography and X-ray phase analysis were applied. The data obtained during the experiments can be used for a more detailed study of ferromanganese nodules of various deposits, for their use as a sorbent.
Estimation of seismic load to the oil pipeline with manholes
Authors: Bayazitov M I , Berdin V K , Kulakov P A , Afanasenko V G , Bayazitov R M , Tlyasheva R R
Published: December 2019

Estimation is to predict the outcome of seismic load to underground pipeline with manholes. Forces and shears were taken into account during modelling of seismic resistance. There were 3 types of waves identified in this job, and the estimation of the maximum velocity of the soil movement was made according to the category of soil by seismic properties. The seismic resistance was estimated under the action of both horizontal and vertical directions of seismic load. The model of a manhole was created from scratch by authors. The main supporting elements of the body were modelled in a stress-deformed mode. The transmission of seismic longitudinal P-waves was simulated with parameters up to 9 points inclusive at the MSK-64 scale in soils of medium density. Based on the analysis of the data obtained, a graph of maximum equivalent von Mises stresses was built depending on the phase of the seismic longitudinal P-wave transmission. Conclusions were made about the efficient usage of applying the proposed approach to solve this class of problems.
Static and dynamic approach to estimation of spring water mineralization stability as a factor of groundwater ecological safety
Authors: Vasyukov A E , Korzhavyi A P , Nikulina S N
Published: December 2019

To assess the degree of influence of technogenic factors on the groundwater mineralization, it is proposed to consider simultaneously in a static and dynamic position the results of conductometric determination in spring water of generalized indicators, such as electrical conductivity and the coefficient of identification of the mineral composition of water. This is shown by the example of four springs located in the territory of Kaluga. This made it possible to establish the average annual background values of electrical conductivity and the coefficient of identification of the mineral composition of water, as well as to justify the permissible or weakly expressed degree of influence of technogenic factors on the quality of groundwater in the period from November 2017 to October 2018 by the criterion of exceeding the error of the conductometric method (2%) by 3 or more times.
On the formulation and solution of the boundary value problem of drilling well by differently mounted drilling bits
Authors: Kolotvin A V , Ganin E V
Published: December 2019

The tensity of the drilled rock under the influence of two circular and annular drilling bits rotating in opposite directions is of profound interest. The aforecited method solves the problem of spin moment removal from the drill string. Assessment of the tensity determines the formation stimulation during drilling. Inasmuch as the drill bits are circular in the axial plane of the aperture, the elastic strain range is not simply-connected. To solve this problem, it is proposed to consider the equations of the elasticity theory in a toroidal coordinate. This statement corresponds to the axisymmetric torsion problem articulated by A.I. Lurie [1]. The task is formulated and solved in the displacements indicating the subsequent transition to tensions. An outstanding feature in comparison with the Laplace equation is the presence of an additional summand. The boundary conditions are displacements’ equality to zero on the axis and on the walls of the aperture. Then an additional solution of the problem is carried out in a cylindrical coordinate, shifted to the bottom of the slaughter. Two solutions are compared.
The refined method of risk assessment of the technical condition determination of the aviation equipment critical elements
Authors: Korshunov G I , Polyakov S L , Nurushev E T , Smirnova V O
Published: December 2019

The accuracy of the critical systems assessment of aviation equipment is paramount importance. The paper proposes a method of risk assessment, based on combined statistical methods, in the technical condition determination of the aircraft critical systems. The application of FMEA-analysis technology is considered in order to improve the accuracy and reliability of the obtained values. This technique can be useful for refining the resulting indicator in the presence of different emissions in total set of estimates.
Impact of undissolved gas on dynamic processes in the fluid drive for well testing and servicing research
Authors: Lunev A S , Nikitin A A , Afanasov V I , Kaizer Y F , Lysyannikov A V , Dunaeva S P
Published: December 2019

This paper concerns topical issues because power oils for a hydraulic drive are the mixture of liquid and undissolved gas. This mixture can arise when tanking and during dynamic processes because of the different dissolution and evolution rates of gas in a pressure fall in some spots of power fluid flow. That is why this paper deals with the impact of the gas factor on the behavior pattern of fluid. When describing the processes fluid drive was considered as a lumped parameters system.
Hydromechanical devices to prevent paraffin deposits
Authors: Feodorov A B , Afanasov V I , Lunev A S , Spirin T S , Kurochkin E S , Zagorulko A J
Published: December 2019

The focus is on paraffin deposits on the walls of the tubing. Devices will be analyzed to prevent them. The conditions of hydrocarbon deposits in Eastern Siberia are considered. Hydrocarbon fluid is in critical condition. Small changes in physical parameters lead to the launch of phase transitions. Such changes take place in the process of lifting the liquid to the surface. There is a drop in pressure and temperature. Natural gas is released and, as a result, conditions are formed for the precipitation of paraffin crystals. The adsorption capabilities of the tubing wall contribute to the initiation of paraffin deposits. Among the units designed to prevent this problem stand out hydrodynamic devices. Due to the creation of cavitation zones, local formation of crystallization centers is provoked. Moreover, these lacunae are in the stream, i.e., separated by a moving fluid from the pipe wall. These circumstances contribute to the removal of the resulting paraffin crystals up to the surface. At times, labor costs for cleaning the pipe walls from paraffin deposits are reduced. An important advantage of hydrodynamic devices such as swirlers, cavitators is the absence of moving parts. This ensures reliable operation and ease of modernization. Of interest is the property of device casings to keep clean from paraffin deposits. This circumstance is associated with concomitant vibration. Permanent shaking off of the rudiments of deposits occurs.