bluuebunny/crossref_metadata_2025_split huggingface dataset:
The PMSM-drive submersible centrifugal pumps efficiency determining
Authors: Lysenko O A , Simakov A V , Kharlamov V V 
Published: September 2019

Abstract
In the paper, the problems of modelling and calculating the electromagnetic moment are considered. The study subjects are submersible induction and synchronous electric motors for centrifugal pumps. This task is relevant, because the requirements for oil production technology are growing. A brief description of the electric submersible pumps (ESPs) is given and the main design features of submersible motors are presented. The software for constructing and calculating the mathematical model of a submersible motor is selected. The field lines pictures in the section of motors are created. Characteristics of moment-current, moment-slip, moment-angle are built. Comparison results of two types of submersible motors are presented.
Getting external load characteristics of the axle-box generator
Authors: Lysenko O A , Songin M V , Kail M S , Yu Marchinskiy I 
Published: September 2019

Abstract
This article addresses the problem of supplying freight railcars. It is about the axle-box generator. The generator uses to power the on-board electronics. The design feature consists in the fact that the generator is installed to the generator’s axle-box and, as a result, it has increased requirements for the weight and size indications. The generator was designed with an external rotor due to the limited space, since the rotor acts as an inductor. The inductor is made of permanent magnets. The stator is made of laminated electrical steel in the six-pointed star form. The winding is made of copper conductor with a cross-sectional area of 0.2 mm2. Characteristics are presented in the form of waveforms and graphs. During the experiment, a number of oscillograms were taken and harmonics were counted. Voltage were also measured at different loads and rotation speeds. The obtained power at an average speed of 30 km/h was 4 W, and at a speed of 80 km/h it was 6.3 W. The method for determining the parameters of the anchor chain equivalent circuit is given.
Multicomponent Emulsified Biofuels for Transport Diesel Engines
Authors: Markov V A , Kamaltdinov V G , Denisov A D , Bykovskaja L I 
Published: September 2019

Abstract
Vegetable oils are a significant raw material resource for producing biodiesel fuels. But while using vegetable oils as fuels, the coking of the combustion chamber elements and injectors’ spraying nozzles. These problems can be solved by supplying water into the combustion chamber through the injectors. The article considers an opportunity of ensuring the stable operation of the diesel engine when it is powered by multicomponent emulsified biofuels. Emulsions of petroleum diesel fuel, rapeseed oil and water were investigated. The results of experimental studies of the automotive diesel engine running on these fuels are presented. According to the test results the efficiency of using these emulsions as fuels for diesel engines was evaluated. The favorable combination of characteristics of fuel efficiency and toxicity of diesel engine exhaust gases is obtained by using an emulsion containing 57% of petroleum diesel fuel, 30% of rapeseed oil and 13% of water (by volume). At the maximum power mode, the replacement of petroleum diesel fuel with this emulsion enabled to reduce exhaust smoke opacity from 16.0 to 7.5% according to the Hartridge scale. By the modes of the thirteen-mode cycle the integral specific emission of nitrogen oxides NOx decreases from 6, 610 to 5, 552 g/(kW·h).
Calculation of resonant modes for power supply systems and development of measures on higher harmonics filtering
Authors: Osipov D S , Kovalenko D V , Eremin E N , Sidorov O A , Ya Bigun A 
Published: September 2019

Abstract
This paper presents the calculation of non-stationary non-sinusoidal mode of the power supply system (PSS) under the condition of current resonance (parallel resonance). Evaluation of the need for higher harmonics (HH) filtering was carried out. To achieve this, measurements of the actual level of HH and other unified power quality indexes were conducted, and oscillograms of the network mode parameters and HH spectrum were constructed. The measurement of unified power quality indexes was carried out with certified and calibrated power quality analyzers Metrel 2792A. These instruments satisfy the effective world standards on power quality and other reference documentation. Resonance frequencies where resonance modes emergence is possible were determined by calculation. Maximum overvoltage ratios for different points of the examined PSS were also determined.
Short-term forecast methods of electricity generation by solar power plants and its classification
Authors: Tyunkov D A , Gritsay A S , Potapov V I , Khamitov R N , Blohin A V , Kondratukova L K 
Published: September 2019

Abstract
The article provides a classification of existing forecast models the generation of electricity by solar power plants and discusses various options for forecast methods for each of the selected models. As a result of the study, it was concluded that the most promising forecast methods are hybrid statistical-adaptive methods.
The role of SiHn radicals generation in the mechanisms of formation of thin films of amorphous silicon
Authors: Baranova L V , Strunin V I , Zh Khudaybergenov G 
Published: September 2019

Abstract
In this research, we studied the processes of configuration changes to the structural elements of amorphous silicon thin films created by the decomposition of reacting gas mixture (silane and argon) in low-frequency glow discharge plasma. We analyzed how concentrations of various local atomic groups and their links depend on deposition parameters. We also defined phase composition and the role of SiHn radicals generation in the mechanisms of formation of hydrogenated amorphous silicon thin films deposited on glass and Sitall substrates.
Multi-criteria synthesis of standing connections of the support of the running screw CNC machine
Authors: Denisenko A F 
Published: September 2019

Abstract
The creation of modern CNC machines requires the development of the design of machine feed drives with specified performance criteria. Ensuring the characteristics of feed drives that meet these criteria is largely related to the reasonable choice of design and technological parameters of standing connections available in the design. It is shown that this task, due to the presence of several conflicting criteria and a significant number of variable design parameters (VDP), is the task of parametric multi-criteria synthesis of compounds. The stages of the procedure of parametric multi-criteria synthesis of stationary machine tools are considered. The design variables and the formation of permissible regions of their variation, determined by the presence of parametric, functional, and criterion constraints, are analyzed in detail. It is indicated that the determination of the solution search area (the Pareto region) is most conveniently performed by scanning using the LPτ -sequence. It is proposed, in connection with the complexity of describing the boundaries of the Pareto region, to use its approximation by the described hyper-parallelepiped. Since the area of the search for solutions is characterized by the fact that any solution belonging to it cannot be improved simultaneously by all criteria, it is proposed to use a generalized criterion, calculated during scanning, when selecting possible deviations of the VDP from nominal values. Calculations performed according to the proposed procedure for the left support of the running screw of the longitudinal feed drive of the CNC machine mod. 1P426DF3, allowed to determine the nominal values and deviations of each of the VDP standing connections.
The influence of aging on the structure and properties of metal 30n8kh6m3styu obtained by surfacing
Authors: Eremin E N , Losev A S , Ponomarev I A , Borodikhin S A , Matalasova A E 
Published: September 2019

Abstract
For surfacing wear-resistant coatings, flux-cored wires based on high-strength steels with the effect of secondary hardening are widely used. The aim of the work was to study the peculiarities of hardening by aging of economically alloyed steel 30N8Kh6M3STYu, obtained by welding wire with flux-cored wire. It has been established that such steel has the best results of durometric properties as a result of aging at a temperature of 550 °C for 2 hours. In this case, the microhardness of the structural components increases 1.2-1.4 times, and the steel hardness reaches 53 HRC. It is shown that the structure of steel after aging consists of martensite and 14 types of compounds of phase components. It was established that steel hardening is due to the formation of complexes of four carbides TiD0.707C0.5, Cr3C2, TiC, SiC, nine intermetallic compounds Cr0.92Mo3.08, Fe0.875Mo0.125, D2Ti, Mo0.984Ni0.016, Ti3Al, Ni3Ti, FeCr, AlFe, NiTi2 and nitride Fe24N10. The rather high values of the hardness of such steel after aging and the insignificant effect of the duration of the effect of heat treatment on the reduction of its values allow us to recommend flux-cored wire created on its basis for surfacing parts operating under conditions of moderate wear at elevated temperatures.
Effect of N2 and Ar on the properties of multicomponent ion-plasma coatings 12X18H10T+Cu+Al
Authors: Guchenko S A , Eremin E N , Zavatskaya O N , Ch Laurinas V , Yurov V M 
Published: September 2019

Abstract
Currently, more and more attention is paid to the creation of complex coatings on machine parts and mechanisms applied by various methods that can increase hardness, wear resistance, corrosion resistance and heat resistance. Improving the physicochemical and mechanical properties of relatively cheap metal alloys, when applied with such coatings, allows increasing the service life of parts, saving material resources. The purpose of the presented work is to create heat-resistant coatings that are not inferior in their characteristics to expensive heat-resistant steels. In the work, the heat resistance of ion-plasma coatings obtained by the method of cathode-ion bombardment at the same time by three electric arc evaporators (Cu, Al and chromium-nickel alloy) in an atmosphere of argon and nitrogen at a pressure of 0.5 Pa was studied. As a result of the measurements, it was established that the coatings obtained have a hardness and wear resistance greater than the nickel-chromium alloy itself; the heat resistance of the applied coatings, especially those obtained in argon, is uniquely high.
Structural-morphological features and fretting resistance of nanostructured topocomposites formed by ion-plasma modification
Authors: Korotaev D N , Poleschenko K N , Eremin E N , Vershinin G A , Tarasov E E , Ivanova E V 
Published: September 2019

Abstract
The article proposes an approach to solving the problem of increasing fretting resistance of lock joints of blades for gas turbine engines through the creation of nanostructured topocomposites with the surface layers in a metastable state having a low shear stability in terms of vibrofriction. The authors implement the method of vacuum combined ion-plasma processing, which allows forming the surface layers of the material with mixed amorphous-nanocrystal structure and purposeful controlling the surface morphology. They show that the proposed flow diagram allows developing the required morphology from the arrays of nano-sized conglomerates of the “asperity – cavity” type on the surface. A comparative study of fretting resistance of nanostructured topocomposites in terms of vibrofriction is carried out. It is established that the specificity of their wear is to reduce the wear rate at the initial stage.
Development of Two-Component Polymer-Polymeric Composites Based on UHMWPE-PP Blends for Additive Manufacturing
Authors: Panin S V , Buslovich D G , Kornienko L A , Alexenko V O , Dontsov Yu V 
Published: September 2019

AbstractIn order to develop extrudable polymer composites for additive manufacturing some mechanical and tribological properties of polymer-polymeric mixtures of ultra-high molecular weight polyethylene (UHMWPE) and polypropylene (PP) have been investigated. The problem of selecting rational compositions with the aim of improving the manufacturability (extrudability) of UHMWPE was solved. It is shown that extrudable 3D-printed UHMWPE composites over their tribomechanical properties (wear resistance, friction coefficient, elastic modulus, yield point, tensile strength, and elongation at break) exceed those of the hot pressing fabricated composite. This is related to more uniform ordered permolecular structure formation with increased crystallinity. It is shown that the composite ″UHMWPE + 20 wt.% PP″ is the most efficient from the standpoint of maintaining high tribomechanical properties and possessing acceptable melt flow rate (MFR) index.
Mathematical modeling of the stress state of the tubular stand of the cultivator
Authors: Pirogov S P , Kokoshin S N , Cherencov D A 
Published: September 2019

Abstract
The paper presents the results of the calculation of stresses and strains of the cultivator stand structure with a flexible tubular element under loading with internal pressure and external force. For research, we used the finite element method, implemented in the program “ANSYS”. The tasks of building a grid model of a tubular element were solved, the displacements of the free end and stresses under the action of internal pressure were determined, and the maximum allowable pressure value was found. The horizontal component of the impact force of the soil on the cultivator, at which buckling occurs, is determined, and the influence of the section shape on the characteristics of the cultivator stand is investigated.
The Design of Rollers for Rolling Corrugations in the Ribbon
Authors: Yu Popov A , Shchipkova Yu V 
Published: September 2019

Abstract
Corrugated stainless steel ribbon is used as a working element in modern heat exchangers designed for high working temperatures (up to 1000°C). Making corrugations on the ribbon is the most time-consuming operation, which determines the relevance of the study subject. The article offers a method for calculating the tool profile, provided that the centroid is on the outer diameter of the tool. According to the results of calculations and practical studies, this method should be applied. The profile of the rollers was profiled depending on the specified ribbon profile, limits of ribbon profile parameters are determined. The study subject is to determine the grooves profile of the rolling rollers and to determine rational methods for visualizing the rolling process in order to simulate it. To accomplish this aim, the following tasks are to be solved: 1. To determine the rational position of the centroid during the rolling of corrugations on rollers. 2. To determine the parameters of the profiles when the tool centroids are located on the outer diameter of the rollers in the rolling process.
A method of quality control of plain bearings by their thermophysical properties
Authors: Salikhov R F , Akimov V V , Musagitova G N , Negrov D A 
Published: September 2019

Abstract
The article proposes a method for controlling the quality of plain bearings materials in internal combustion engines that affect the failure of such important and expensive parts as a crankshaft and a cylinder block. Quality control of materials, which have been used for plain bearings manufacture, during repair action of construction machinery and equipment, as well as reduction of cost and duration of technical control operations implementation are among the issues of the day for repair service organizations. In this paper a thermal method of plain bearings materials quality assessment in internal combustion engines is suggested. This method is remarkable for its comparative simplicity; it does not require destruction of the material and application of expensive equipment. A thermal calculation of the compared plain bearings has been improved and carried out, taking into account the obtained thermophysical parameters, the minimum clearances for the coupling “crankpin - liner” for the studied samples of foreign production, which can be used in manufacture as guidelines, have been defined. The calculation of the specific heat, the coefficients of thermal conductivity and linear expansion of plain bearings permits to select the right kind of lubricant, the required clearances, and thus prevent accidental breakdowns after major repairs of internal combustion engines.
The mechanical stresses in the molybdenum films formed by magnetron sputtering on a sitall substrate
Authors: Strunin V I , Zeema V N , Chirikov N A , Kozlov A G 
Published: September 2019

Abstract
The results of investigations of mechanical stress in molybdenum films formed by magnetron sputtering at a constant current when the pressure of the argon in the vacuum chamber of less than 0.13 Pa are presented. It is shown that the magnitude of mechanical stress in Mo films depends on substrate temperature, power on the target and argon gas in a vacuum chamber. The minimum value of the mechanical stress in the Mo films were (13-15) · 10−8 H/M2 when they were formed at a power on a target less than 700 W, the flow of argon 6-9 sccm, the substrate temperature (550-620) K and a pressure of argon in the vacuum chamber is 0.07 Pa.
Construction of the equation of fractals structure based on the rvachev r-functions theories
Authors: Anarova Sh , Nuraliev F , Narzulloev O 
Published: September 2019

Abstract
The article is devoted to the construction of the equation of fractal complex structures based on the theories of Rvachev R-functions (RFM), the application of the recursion procedure. Using the equation of objects elementary geometries and constructive means of the method of R-functions R0: R-conjunctions, R-disjunctions and R-reflections, various fractal equations are constructed. Based on these equations, specifying the number of iteration and the angle of inclination various pre-fractals are generated
Areas for the existence of biquadratic transformations
Authors: Baidabekov A K , Kemelbekova E A 
Published: September 2019

Abstract
Analysis and research carried out quadratic transformations of applied geometry shows that quadratic transformations of the plane have been studied sufficiently and have found wide application in science and technology. However, little attention has been paid to the study and application of four to four-digit correspondences to the plane. Therefore, the article is devoted to the development of the theory of four-four-digit correspondences between non-aligned planes and the development of the theory of biquadratic plane transformations. As a result of the consistent implementation of the proposed constructive device, each point A plane П1
is converted to four points

A
1
/

,

A
2
/

and

A
3
/

,

A
4
/

plane of П1/. Given the two parametric set of points of the combined plane П1
/=П1
we obtain a biquadratic transformation of the plane, denoted by the letter L. In a similar way, it can be shown that in the opposite direction each point A/
of the plane

П
1
/

is transformed into four points of the plane П1
. This transformation is denoted by the letter L/
. Also this article is devoted to determining of the area existence in the development of the theory of biquadratic transformation plane, improvement of methods of geometric design of curves and curved surfaces in construction design. To achieve this purpose it’s requiring to solve the following theoretical and practical problems: definition and development of graphic model of biquadratic transformations of the plane, determination of the existence area of the transformation. The results can be widely used in design and research institutes by designing and construction of surfaces of technical forms, also new dome shells and other surfaces in architectural design.
Parametric design of technological processes based on multidimensional geometric modelling
Authors: Chizhik M A , Moskovtsev M N 
Published: September 2019

Abstract
A method of parametric design of technological processes has been developed based on the theory of multidimensional geometry using elements of parametrization, multidimensional computational geometry and geometric modelling. The method allows a technological process to be described by a hypersurface defined by a set of lines of one- or two-dimensional frames in a multidimensional complex plot. Its parameters are regarded as a certain set of points and lines of a space which is defined as an intersection of the frame lines by hyperplanes of a given level. The article proposes a computer implementation of the method which provides a solution to engineering problems with required accuracy. A geometric model of a thread stitching technological process has been obtained. The model allows to set a parameter range and determine the modes of obtaining compounds of a given quality in a wide range of possible solutions depending on the package of product materials, the number of process equipment parameters and process criteria.
Designing architectural surfaces according to preset geometrical conditions
Authors: Korotkiy V A , Khmarova L I 
Published: September 2019

Abstract
Considering various ways of shaping, the paper analyzes and geometrically interprets the space-planning and process requirements posed to the frame of the designed architectural surface. It considers the issues of designingshells formed by various ways of extracting a frame from a set of lines. Astructural kinematic method is used as the main one, which allows us to depict a surface and show the points and lines belonging to it. The surface frame is extracted from a set of algebraic curved lines. Straight lines and second-order curves are more preferable. We proposed to use a focal second-order surface toextracta linear surface frame. Straight lines tangent to the second-order surface form a three-parameter set of straight lines (a complex of straight lines).To extract a one-parameter ruled surface from a three-parameter complex of straight lines, we proposed to use additional curvilinear guides allowing us to control the shape of the surface. The structural kinematic method allows us to design smooth architectural shells based on an arbitrary spatial contour. We considered examples of building smooth composite surfaces passing through a given contour and including a given compartment of a second-order focal surface. We proposed a design of a transitional ruled surface connecting the roof and dome of a church building. The working drawing of the transitional surface evolvent is made on the basis of the descriptive geometry methods. The surface frame is built using three-dimensional computer graphical means. An expedient combination of computer graphics and theoretical methods of descriptive geometry allows us to obtain surfaces meeting the preset geometric conditions.