4_2023_sen_2

Title of the article DEVELOPMENT OF A DYNAMIC MODEL FOR CALCULATING THE KINEMATIC ERROR AND EVALUATING ITS EFFECT ON THE EFFICIENCY OF PLANETARY MECHANISMS WITH ROLLING BODIES
Authors

KAPITONOV Alexander V., Ph. D. in Eng., Assoc. Prof., Associate Professor of the Department “Mechanical Engineering Technology”, Belarusian-Russian University, Mogilev, 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 16–24
Type of article RAR
Index UDK 621.83.06
DOI https://doi.org/10.46864/1995-0470-2023-4-65-16-24
Abstract When studying the characteristics of the mechanisms of small-sized drives, an important task is to develop ways to increase the efficiency of the mechanism. The article discusses theoretical issues related to the influence assessment of kinematic error on the efficiency of gears with rolling bodies. As a result of the research, a generalized dynamic model of planetary ball and roller mechanisms is obtained, taking into account kinematic errors, linking manufacturing errors or elastic deformations and kinematic transmission error. Mathematical dependences of the dynamic model of mechanisms with rolling bodies are derived. The model was tested on the example of calculating the kinematic error of a single-stage planetary ball transmission. Polynomial equations with constant coefficients are obtained for determining kinematic errors from the influence of manufacturing errors of transmission links. It is established that for different kinematic schemes, gear ratios and angular velocities of planetary mechanisms with rolling bodies, the transmission efficiency can vary significantly depending on its kinematic error. For gear ratios from 1.5 to 5, drive shaft rotation speeds from 1,500 to 3,000 rpm, depending on the highest values of the kinematic error from 0.00175 to 0.0349 radians, the transmission efficiency within the driven shaft rotation can decrease from 0.93 to 11 %. At the same time, transmissions constructed according to the sixth kinematic scheme have the highest efficiency values. The average efficiency value per revolution of the driven shaft from the influence of kinematic errors can decrease up to 5 %. Graphs of the dependences of transmission efficiency on their kinematic errors are given.
Keywords dynamic model, mechanisms with rolling bodies, efficiency, kinematic error
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4_2023_sen_1

Title of the article OVERVIEW AND CLASSIFICATION OF COPYING SYSTEMS OF FIELD SURFACE IN DESIGNS OF HARVESTING AGRICULTURAL MACHINES
Authors

JASAU Dzmitry V., Leading Design Engineer – Head of the Sector of Design and Research Department of Dynamics, Durability, Analytical Reliability, Scientific and Technical Centre of Combine Harvesters Manufacturing OJSC “Gomselmash”, 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 GENERAL ISSUES OF MECHANICS
Year 2023
Issue 4(65)
Pages 5–15
Type of article RAR
Index UDK 631.35, 681.52
DOI https://doi.org/10.46864/1995-0470-2023-4-65-5-15
Abstract The article presents the description, principle of operation and formulates basic function of copying systems of field surface of harvesting agricultural machines. The review of existing counterbalancing mechanisms and copying systems of field surface used in the designs of harvesting agricultural machines is made, their advantages and disadvantages are highlighted. According to the results of the review of designs of various copying systems, the classification of these systems is proposed, and the structural relationship is described, which makes it possible to characterize various designs of copying systems in a general way.
Keywords counterbalancing mechanism, copying system, pneumohydraulic accumulator, spring, lever mechanism, agricultural machine
  You can access full text version of the article.
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4_2023_sen

GENERAL ISSUES OF MECHANICS
Jasau D.V.
Overview and classification of copying systems of field surface in designs of harvesting agricultural machines
5
DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Kapitonov A.V.
Development of a dynamic model for calculating the kinematic error and evaluating its effect on the efficiency of planetary mechanisms with rolling bodies
16
Gegedesh M.G., Petrachkou S.A.
Computer-based strength analysis of tank-containers under impact
25
Kudelko I.U., Sidorenko A.G., Sotnikov M.V.
Research of destruction causes of largesized bearings of mining dump trucks
31
MECHANICAL ENGINEERING COMPONENTS
Trusevich I.A., Taratorkin A.I., Taratorkin I.A.
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
38
Parmanchuk V.V., Shyshko S.А., Rehinia U.V.
Investigation of the cavitation process in the circulation circle of the hydromechanical transmission of the BELAZ loader
47
MECHANICAL ENGINEERING MATERIALS AND TECHNOLOGIES
Grigorchik A.N., Kukareko V.A., Belotserkovsky M.А., Sosnovskiy A.V., Astrashab E.V.
Wear resistance of antifriction gas-thermal coatings based on the Cu-Al system under boundary friction
54
Shil’ko S.V., Chernous D.A., Stolyarov A.I., Zhang Q.
Thermomechanics of disperse-filled composites and computer design of materials with record high thermal conductivity
63
MATERIALS SCIENCE IN MECHANICAL ENGINEERING
Senyut V.T., Vityaz P.A., Parnitsky A.M.
Thermodynamic analysis of the formation of a nanostructural polycrystalline material based on nanodiamonds modified with non-diamond carbon (part 2)
76
COMPUTER MECHANICS
Khotko A.V.
Prediction of load and stiffness characteristics of pneumatic tires by computer modeling methods
85
GEOMECHANICS
Polyakov A.L., Lapatsin S.N., Mozgovenko M.S., Rachkovskiy M.A.
On the influence of longwall mining on the deformation of the operational excavations
97
BIOMECHANICS
Merkuryev I.V., Chung C.T., Saypulaev G.R., Saypulaev M.R., Deeb D.
Development of a kinematics model of human fingers for application in robotic gloves
106
OUR JUBILEES
Pleskachevsky Yuriy Mikhaylovich (on the occasion of his 80th birthday)
114
Kukareko Vladimir Arkadevich (on the occasion of his 75th birthday)
117