4_2023_sen_7

Title of the article WEAR RESISTANCE OF ANTIFRICTION GAS-THERMAL COATINGS BASED ON THE Cu-Al SYSTEM UNDER BOUNDARY FRICTION
Authors

GRIGORCHIK Alexander N., Ph. D. in Eng., Deputy Head of the Center of Structural Research and Tribomechanical Testing of Materials and Mechanical Engineering Products of Collective Use of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KUKAREKO Vladimir A., D. Sc. in Phys. and Math., Prof., Chief of the Center of Structural Research and Tribomechanical Testing of Materials and Mechanical Engineering Products of Collective Use of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

BELOTSERKOVSKY Marat А., D. Sc. in Eng., Prof., Head of the Laboratory of Gas-Thermal Methods of Machine Components Hardening of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SOSNOVSKIY Aleksey V., Ph. D. in Eng., Assoc. Prof., Leading Researcher of the Laboratory of Gas-Thermal Methods of Machine Component Hardening of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ASTRASHAB Evgeniy V., Researcher of the Center of Structural Research and Tribomechanical Testing of Materials and Mechanical Engineering Products of Collective Use of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICAL ENGINEERING MATERIALS AND TECHNOLOGIES
Year 2023
Issue 4(65)
Pages 54–62
Type of article RAR
Index UDK 621.793
DOI https://doi.org/10.46864/1995-0470-2023-4-65-54-62
Abstract The paper studies the structure, phase composition, durometric and tribological properties of sprayed composite gas-thermal coatings based on the Cu-Al system. It is shown that the sprayed coatings include Cu, Al, Cu9Al4, CuAl2, Cu3Al, Si, Al2O3 phases. It is established that additional annealing of composite coatings at 175 and 225 °С for 2 h leads to an increase in the content of intermetallic compounds in them up to ≈ 43 vol.%, which contributes to an increase in the microhardness of the composites up to ≈ 20 % compared to the initial state. It is noted that the coating of “CuSi3Mn1+AlSi12” is characterized by increased wear resistance in the environment of the lubricant I-20A and its wear resistance is up to 2 times higher than the wear resistance of the sprayed coating of bronze CuSn10P1. It is shown that additional annealing of coatings made of “CuSi3Mn1+AlSi12” leads to an increase in their wear resistance up to 30 % compared to the initial state.
Keywords composite materials, antifriction coatings, phase composition, intermetallic compounds, wear resistance
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4_2023_sen_6

Title of the article INVESTIGATION OF THE CAVITATION PROCESS IN THE CIRCULATION CIRCLE OF THE HYDROMECHANICAL TRANSMISSION OF THE BELAZ LOADER
Authors

PARMANCHUK Vera V., M. Sc. in Eng., Second Category Design Engineer of the Design Bureau of Hydromechanical Transmissions, JSC “BELAZ — Managing Company of the Holding “BELAZ-HOLDING”, Zhodino, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SHYSHKO Siarhei A., Deputy Chief Designer – Head of Mechanical Transmissions Department, JSC “BELAZ — Managing Company of the Holding “BELAZ-HOLDING”, Zhodino, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

REHINIA Uladzimir V., Ph. D. in Eng., First Category Design Engineer of the Design Bureau of Hydromechanical Transmissions, JSC “BELAZ — Managing Company of the Holding “BELAZ-HOLDING”, Zhodino, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICAL ENGINEERING COMPONENTS
Year 2023
Issue 4(65)
Pages 47–53
Type of article RAR
Index UDK 621.226.5:532.528
DOI https://doi.org/10.46864/1995-0470-2023-4-65-47-53
Abstract A study of the working fluid flow in the torque converter was carried out using CFD modeling technology and an analysis of the dependence of cavitation on the torque converter operating mode. It is noted that torque converter cavitation mainly occurs at low gear ratios, the degree of cavitation decreases as the gear ratio increases. Most of the cavitation bubbles formed at the ends of the reactor wheel blades, which led to an unstable change in the moment characteristics and a deterioration in the torque converter performance. The analysis showed that the cavitation process is extremely unstable and periodic, and the development of cavitation near the top of the impeller blade occurs in four stages: the creation, growth, separation and decay of cavitation bubbles.
Keywords torque converter, CFD modeling, cavitation, heterogeneity, fluid flow, circulation circle, hydraulic losses, hydromechanical transmission
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4_2023_sen_4

Title of the article RESEARCH OF DESTRUCTION CAUSES OF LARGE-SIZED BEARINGS OF MINING DUMP TRUCKS
Authors

KUDELKO Igor U., Researcher of the Laboratory of Reliability Problems and Metal Intensity of High and Extra-High Capacity Dump Trucks of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SIDORENKO Aleksandr G., Ph. D. in Eng., Head of the Laboratory of Reliability Problems and Metal Intensity of High and Extra-High Capacity Dump Trucks of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SOTNIKOV Maksim V., Researcher of the Laboratory of Reliability Problems and Metal Intensity of High and Extra-High Capacity Dump Trucks of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Year 2023
Issue 4(65)
Pages 31–37
Type of article RAR
Index UDK 621.822; 669.018.24
DOI https://doi.org/10.46864/1995-0470-2023-4-65-31-37
Abstract The paper considers the main types and causes of surface damage that lead to the destruction and failure of large-sized bearings of motor-wheel reducers (MWR) of BELAZ mining dump trucks. The disadvantages of 20Х2Н4A (20Kh2N4A) steel currently used for the manufacture of large-sized MWR bearings are given. It is shown that using this steel it is problematic to achieve a high and uniform distribution of microhardness values over the thickness of the hardened layer. The analysis of the destruction of this type of bearings made of 20Kh2N4A steel largely determining the required life of the motor-wheel reducers, is carried out. The obtained research results indicate the need to use new grades of steels for the manufacture of largesized MWR bearings.
Keywords large-sized, bearings, motor-wheel reducers, fracture, microhardness, 20Х2Н4А (20Kh2N4A) steel, warpage
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4_2023_sen_5

Title of the article IMPROVING THE ACOUSTIC BEHAVIOR OF THE HOUSING OF AUTOMATIC TRANSMISSION OF N2 CATEGORY VEHICLE BASED ON THE METHOD OF MODAL REPRESENTATION OF A DYNAMIC SYSTEM
Authors

TRUSEVICH Ilya A., Ph. D. in Eng., Junior Researcher, Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation; Associate Professor of the Department of Tracked Vehicles and Applied Mechanics, Kurgan State University, Kurgan, Russian Federation; First Category Design Engineer, JSC “Special Design Bureau of Mechanical Engineering”, Kurgan, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

TARATORKIN Alexander I., D. Sc. in Eng., Senior Researcher, Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

TARATORKIN Igor A., D. Sc. in Eng., Prof., Chief Researcher, Head of the Department of Mechanics of Transport Vehicles, Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation; Professor of the Department of Tracked Vehicles and Applied Mechanics, Kurgan State University, Kurgan, Russian Federation, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICAL ENGINEERING COMPONENTS
Year 2023
Issue 4(65)
Pages 38–46
Type of article RAR
Index UDK 629.3
DOI https://doi.org/10.46864/1995-0470-2023-4-65-38-46
Abstract There is a global tendency nowadays in the development of transport vehicles to ensure high safety, energy efficiency and comfort, characterized primarily by ergonomic and vibroacoustic indicators. This forces engineers and scientists to constantly strive to reduce a noise level emitted by both the vehicle as a whole and individual units and systems. The paper is a continuation of a series of articles devoted to the development of a verified mathematical model of a promising automatic transmission (AT) for a N2 category vehicle, reliably characterizing its vibroacoustic behavior. The article represents the results of a computational and experimental study of the AT vibroacoustic behavior, including the stages of testing, processing and analysis of their results, verification of the computational model created in the Simcenter 3D software product, identification of the main sources of acoustic radiation and the development of proposals for its reduction. The vibroacoustic characteristics of the object of study are obtained, namely frequencies and corresponding acoustic pressure values, their localization on the AT housing is performed. The developed and verified AT model makes it possible to predict the level of vibration and acoustic radiation with satisfactory accuracy. Based on comparative evaluation modeling of various design modification options, the best ones are determined, which allow to obtain the minimum acoustic pressure level at the measurement points and neutralize the most significant forms of vibrations. The introduction of the developed scientifically-based technical solutions into the design made it possible to reduce the integral level of acoustic pressure in the entire range from 2 to 10 dBA.
Keywords NVH, vibroacoustics, transmission, simulation, verification, experimental research, digital copy, nonlinearity, prediction
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4_2023_sen_3

Title of the article COMPUTER-BASED STRENGTH ANALYSIS OF TANK-CONTAINERS UNDER IMPACT
Authors

GEGEDESH Maryna G., Ph. D. in Eng., Assoc. Prof., Associate Professor of the Department “Technical Physics and Engineering Mechanics”, Belarusian State University of Transport, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

PETRACHKOU Syarhei A., Head of the Research Laboratory “Freight, Commercial Work and Tariffs”, Belarusian State University of Transport, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Year 2023
Issue 4(65)
Pages 25–30
Type of article RAR
Index UDK 629.463.3:621.642.2:004.94
DOI https://doi.org/10.46864/1995-0470-2023-4-65-25-30
Abstract The paper presents the strength analysis results for a tank-container designed for liquid cargo transportation by rail, automobile and water transport based on computer modeling. The most severe in terms of loads and extreme operation mode of tank-containers is chosen as the conditions for the computer experiment, implying an impact in the longitudinal direction when railway cars collide during their dismantling from the hill at marshalling stations. Calculations are performed using the static analysis module Static Structural of the ANSYS Workbench engineering software package for two loading options for a transport tank: a standard one, corresponding to GOST 33211-2014, and a refined loading option for the tank-container shell. Based on the numerical solution of the differential equations system for the liquid cargo movement, the analysis of which is performed using the finite volume method in the CFX module of the ANSYS Workbench engineering software package, the obtained values of hydrodynamic pressures in the tank are accepted as the initial data for the refined computer simulation. Conclusions are drawn on the influence of taking into account the distribution of hydrodynamic pressure inside the transport tank on the stress-strain state of the tank-container. The distributions of normal, equivalent von Mises stresses, as well as deformations for two loading schemes are obtained. Using the Fatigue Tool of the Static Structural static analysis module, the number of cycles that the structure can withstand is determined, taking into account the equivalent stresses concentration areas. The conclusions are formulated based on the computational results, and the recommendations are offered to improve transportation safety and ensure the safety of cargo using tank-containers.
Keywords tank-container, stress-strain state, strength, fatigue damage, hydrodynamic loading of the tank shell
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