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Articles 1 - 30 of 78
Full-Text Articles in Engineering
Carrying Capacity Of Single-Gauge Railways At Introduction Of Speed Motion Of Passenger-Trains, Saidburkhan Tulaganovich Djabbarov
Carrying Capacity Of Single-Gauge Railways At Introduction Of Speed Motion Of Passenger-Trains, Saidburkhan Tulaganovich Djabbarov
Journal of Tashkent Institute of Railway Engineers
Results over of complex researches of organization of speed and high-speed motion of passenger-trains are brought on existent single-gauge railways, choice and ground of complex of measures on the increase (to maintenance) of freight and throughput capacity, and ensure continuous operation of the infrastructure of operated railways are presented.
Problems Of The State Of The Rolling Surface Of The Rail Head On Speed And High-Speed Railway Sections Of Jsc "Uzbekistan Temir Yollari", Kuvandik Saginovich Lesov, Igor Ivanovich Kuznetsov, Mukhamedali Kazbek Ugli Kenjaliev, Xushnudbek Odilbekovich Samandarov
Problems Of The State Of The Rolling Surface Of The Rail Head On Speed And High-Speed Railway Sections Of Jsc "Uzbekistan Temir Yollari", Kuvandik Saginovich Lesov, Igor Ivanovich Kuznetsov, Mukhamedali Kazbek Ugli Kenjaliev, Xushnudbek Odilbekovich Samandarov
Journal of Tashkent Institute of Railway Engineers
In the process of train traffic on the rolling surface of the rail head are formed bumps and fatigue defects, constant dynamic loads lead to the frustration the upper structure of the path. In this article the analyzes integral indicators of the rolling surface of the rails (long waves, medium waves, short waves) on the section of speed and high-speed train traffic for assess the condition of rails in transit. Problems with the formation of wave-like irregularities on the surface of the rails are identified, promising directions in solving this problem are indicated.
Improvement Of Efficiency Of “O‘Zbekiston” Series Electric Locomotive Control System, Usan Berdiev, Malika Nabievna Tuychieva
Improvement Of Efficiency Of “O‘Zbekiston” Series Electric Locomotive Control System, Usan Berdiev, Malika Nabievna Tuychieva
Journal of Tashkent Institute of Railway Engineers
This article examines the work of efficient use of electric locomotives of the “O‘ZBEKISTON” series operated in the railways of Uzbekistan, storage in working parts, provision of reliable and safe operations, as well as reduction of operating costs and extension of the repair period. For this purpose, during operation, it is constantly necessary to analyze and develop the possibility to achieve planned results using effective methods of technical diagnostics system.
Theoretical Foundations For Determining Kinematic Parameters Of A Jet Unit, Kudrat Raximov, A.R. Babaev, Dilbar Abduraimova
Theoretical Foundations For Determining Kinematic Parameters Of A Jet Unit, Kudrat Raximov, A.R. Babaev, Dilbar Abduraimova
Journal of Tashkent Institute of Railway Engineers
This article discusses the theoretical basis of the dependence of the kinematic parameters, in particular the average speed of flow rate in the suction pipeline of the jet apparatus intended for cleaning water bodies from silting, from changes in the pressure in the mixing chamber. In the problem is considered a single-phase flow, that is, the density of the working and the suction fluid are the same.
Increasing The Efficiency Of Work Of Locomotive Electronic Equipment By Using Portable Diagnostic Devices, Nodir Botirovich Adilov, Nurilla Khayrullayevich Ermatov
Increasing The Efficiency Of Work Of Locomotive Electronic Equipment By Using Portable Diagnostic Devices, Nodir Botirovich Adilov, Nurilla Khayrullayevich Ermatov
Journal of Tashkent Institute of Railway Engineers
This article discusses the current trends in the construction of portable and stationary systems for diagnosing electric and electronic components of locomotives built on integrated chips, as well as presents own model of a portable diagnostic stand for testing electronic devices and electric circuits of locomotives
Evaluation Of The Efficiency Of Flat Sunny Solar Air Heaters With Heat Transfer Turbulizers, Yorkin Sodikovich Abbasov, Muyassar Abubakirovna Umurzakova
Evaluation Of The Efficiency Of Flat Sunny Solar Air Heaters With Heat Transfer Turbulizers, Yorkin Sodikovich Abbasov, Muyassar Abubakirovna Umurzakova
Journal of Tashkent Institute of Railway Engineers
The article presents methods for assessing the effectiveness of flat solar air heaters with heat transfer turbulators. The experience of world scientific achievements in the field of increasing the efficiency of solar air heaters is analyzed. The analysis of the effectiveness of flat air heaters. According to the results of the study, it was determined that, in addition to the traditional formula efficiency, for evaluating the effectiveness of flat air heaters with heat transfer turbulators collectors use methods developed in heat engineering and based on the Reynolds analogy.
Comparative Analysis Of Modern Electric Centralization Systems, Asadulla Raximovich Azizov, Elnara Kuandikovna Ametova
Comparative Analysis Of Modern Electric Centralization Systems, Asadulla Raximovich Azizov, Elnara Kuandikovna Ametova
Journal of Tashkent Institute of Railway Engineers
This article discusses a comparative analysis of modern electrical centralization systems. The possibilities of developing computer centralizations and centralizations implemented on blocks manufactured using microprocessors are discussed
To The Calculation Of Solid-State Cargo Attachment Under The Influence Of Longitudinal Forces, Khabibulla Turanov, Yadgor Ruzmetov, Jamol Shihnazarov
To The Calculation Of Solid-State Cargo Attachment Under The Influence Of Longitudinal Forces, Khabibulla Turanov, Yadgor Ruzmetov, Jamol Shihnazarov
Journal of Tashkent Institute of Railway Engineers
The article is devoted to the calculation of cargo fastening using the current method. It is proved that according to the existing method, the force in all elastic cargo mounts of both one and the other direction under the influence of longitudinal forces has the same value, regardless of the different location of the geometric parameters of the mounts in space. Calculations of forces in elastic elements of fastening by the specified method are given. The results of the comparative analysis showed that the forces in all wire fasteners, in contrast to the existing method of calculation, have different values. …
Analysis Of Sensors Of The Electronic System For Counting Axles (Eacs) And Firm Altpro Frausсher In The Organization Of Train Traffic, Sunnatillo Tuymurodovich Boltaev, Jonibek Fayzullaevich Kurbonov, Aziz Azimovich Saitov
Analysis Of Sensors Of The Electronic System For Counting Axles (Eacs) And Firm Altpro Frausсher In The Organization Of Train Traffic, Sunnatillo Tuymurodovich Boltaev, Jonibek Fayzullaevich Kurbonov, Aziz Azimovich Saitov
Journal of Tashkent Institute of Railway Engineers
In this scientific work, the sensors of the electronic system for counting axles of various firms used in level crossings, trunk and station railways of the Republic of Uzbekistan are investigated. Based on the analysis, the parameters of the EACS accounting system are determined. The parameters that led to system crashes were defined in the electronic system for calculating the axes of the EACS. The parameters of the components of the EACS accounting system are determined, which are the main element in determining free loaded roads, reference points, points and sections of arrows. The conditions for using the sensor parameter …
The Role Of Intra-Production Accounting In The Management System Of Enterprises Of Jsc " Uzbekistan Temir Yullari», Aijan Baxtiyarovna Djumanova, Shohruh Vosiljon O’G’Li Ergashev
The Role Of Intra-Production Accounting In The Management System Of Enterprises Of Jsc " Uzbekistan Temir Yullari», Aijan Baxtiyarovna Djumanova, Shohruh Vosiljon O’G’Li Ergashev
Journal of Tashkent Institute of Railway Engineers
This article discusses the essence, content and tasks of internal accounting and its role in the management system of enterprises of JSC “Uzbekistan temir yullari”. In order to effectively manage the activities of enterprises need to assess the contribution of each farm unit in the final result of the enterprise activity, the mechanism of which are internal accounting, reporting and analysis of their activity. Managers of enterprises for the development and adoption of management decisions need both General information on the enterprise as a whole, and detailed information on intra – production segments of activity-responsibility centers.
To The Question Of The Mathematical Model Of Rational Planning Of Technological Sections Of The Warehouse, Daurenbek Ihtiyarovich Ilesaliev, Jamol Alisherovich Shixnazarov, Avaz Mirsultanovich Merganov
To The Question Of The Mathematical Model Of Rational Planning Of Technological Sections Of The Warehouse, Daurenbek Ihtiyarovich Ilesaliev, Jamol Alisherovich Shixnazarov, Avaz Mirsultanovich Merganov
Journal of Tashkent Institute of Railway Engineers
Modern railway warehouses have an important place in the supply chain.The main task of the railway warehouses is to convert incoming cargo flows with large quantities into outgoing flows.This article discusses the structure of the functioning of a standard railway warehouse.Based on the coating method and methods of V.P. Sityaev developed a rational version of the layout of the railway warehouse, taking into account the cost criteria, representing the amount of logistics costs.Based on the results of the study, three options of non-traditional warehouse planning schemes were obtained and recommended.
Results Of Application Of The Methods “Sologub” And Combinator Sorting In The Process Of Forming Multi-Group Trains At The Sorting Station, Sakijan Kabildjanovich Khudayberganov, Shinpolat Mansuraliyevich Suyunbayev, Sherzod Bakhrom Ugli Jumayev
Results Of Application Of The Methods “Sologub” And Combinator Sorting In The Process Of Forming Multi-Group Trains At The Sorting Station, Sakijan Kabildjanovich Khudayberganov, Shinpolat Mansuraliyevich Suyunbayev, Sherzod Bakhrom Ugli Jumayev
Journal of Tashkent Institute of Railway Engineers
At present, the formation of multi-group freight trains in accordance with the established procedure at all marshalling yards of JSC Uzbek Railways is based on the experience of the relevant personnel. Therefore, one of the urgent tasks is to improve the process of forming such trains based on the introduction of modern technologies. This article presents the results of applying the Sologub methods and combinatorial sorting in the process of forming multi-group trains at the sorting station of JSC Uzbek Railways. The regularity of the dependence of the number of groups in a multi-group train on the required paths was …
Asynchronous Phase Rotor Generators For Power Planes Operating Parallel With A Network, Sharafiddin Kamaliddinovich Alimhodzhaev, Odil Umirzakovich Zakhidov, Mirzohid Hurramovich Taniev
Asynchronous Phase Rotor Generators For Power Planes Operating Parallel With A Network, Sharafiddin Kamaliddinovich Alimhodzhaev, Odil Umirzakovich Zakhidov, Mirzohid Hurramovich Taniev
Journal of Tashkent Institute of Railway Engineers
The article presents the results of studies of asynchronous generators of wind power plants and small hydroelectric power stations operating in parallel with the electric network. The parameters of the equivalent circuit are specified, on the basis of which the analytical dependence of the electromagnetic moment of the generator is found. It is proposed to take into account the revealed features of the mechanical characteristics of the generators that differ from the characteristics determined by the generally accepted analytical method
Comparative Analysis Of Functional Diagnostic Methods Of Traction Asynchronous Motors, Zhavkharbek Sulton Ugli Fayzullaev
Comparative Analysis Of Functional Diagnostic Methods Of Traction Asynchronous Motors, Zhavkharbek Sulton Ugli Fayzullaev
Journal of Tashkent Institute of Railway Engineers
The article provides a comparative analysis of the methods of functional diagnostics of traction induction motors and justifies that of them the most promising are thermal, electric, vibroacoustic and magnetic methods. To obtain the most reliable information in diagnosing the technical condition of traction induction motors, it is recommended that the methods considered be used in conjunction with the simultaneous improvement of their technical means.
The Research Of Transient Processes In Current Transformers By The Operator's Method, Sultan Fayzullayevich Amirov, Shavkat Mukhsimov, Otabek Tashmuhammatovich Boltayev
The Research Of Transient Processes In Current Transformers By The Operator's Method, Sultan Fayzullayevich Amirov, Shavkat Mukhsimov, Otabek Tashmuhammatovich Boltayev
Journal of Tashkent Institute of Railway Engineers
In the article the transient processes occurring in current transformers are investigated and the values of the magnetization current are determined by the operator method using the primary current source. Using the obtained results, the regularities of the magnetization current change in time are analyzed. For the investigated wide-range current transformer with a closed and open core, that is, at different values of T', a comparative analysis of the laws of change in time of the aperiodic components of the magnetic current was carried out. It is determined that current transformers with air gap are effective in all cases when …
On The Dynamics Of The Movement Carriage In The Accelerating Grable The Marshalling Yard, Shukhrat Umarkhodjaevich Saidivaliev, Zakhro Valijanovna Ergasheva
On The Dynamics Of The Movement Carriage In The Accelerating Grable The Marshalling Yard, Shukhrat Umarkhodjaevich Saidivaliev, Zakhro Valijanovna Ergasheva
Journal of Tashkent Institute of Railway Engineers
The article presents the results of studies of the movement of the carriage on the slope hump (including brake position) when exposed to the forces of wind. Maintaining acceptable speed impacts and screening the Park can be achieved by changing the profiles of individual sections of the drain side hump or application of additional wagon retarders.
Application Of Modern, Effective Materials In Rail Road Reinforced Bridge Elements, U.Z. Shermuxamedov, F.Z. Zokirov
Application Of Modern, Effective Materials In Rail Road Reinforced Bridge Elements, U.Z. Shermuxamedov, F.Z. Zokirov
Journal of Tashkent Institute of Railway Engineers
The article is about reducing the construction costs of railroad bridges and the effective use modern building materials. The article compares the technical characteristics of composite fittings and metal fittings and their proportionality. Indeed, recourse saving of metal and composite fittings, as well as factors of localization of construction is compared
Mathematical Modeling Of The Structure Cellular Concrete, Anvar Ishanovich Adilkhodjayev, E.V. Shipacheva, S.S. Shaumarov
Mathematical Modeling Of The Structure Cellular Concrete, Anvar Ishanovich Adilkhodjayev, E.V. Shipacheva, S.S. Shaumarov
Journal of Tashkent Institute of Railway Engineers
The article presents the developed mathematical model of the structure of cellular concrete, which allows one to establish pore sizes and characteristics of inter-pore walls corresponding to the required thermal conductivity and strength of the material, and the results of its numerical implementation are presented
Research Of Surface Condition Of The Rails Rollingon Sections Of High-Speed And High-Speed Train Traffic, E.B. Abdualiyev
Research Of Surface Condition Of The Rails Rollingon Sections Of High-Speed And High-Speed Train Traffic, E.B. Abdualiyev
Journal of Tashkent Institute of Railway Engineers
This article analyzes the intensity of impulse irregularities that occur on the surface of the rolling rail heads on the section of high-speed and high-speed train traffic. On the rolling surface of the rail heads, the formation of pulse irregularities is observed, which are fixed by the measuring system of the track measuring car No. 106. This shows the main character of damage to the surface of the rail head ride
Method Of Calculation Of Self-Stressed Concrete Slabs Supported Along The Contour, S.S. Salixanov
Method Of Calculation Of Self-Stressed Concrete Slabs Supported Along The Contour, S.S. Salixanov
Journal of Tashkent Institute of Railway Engineers
The paper presents the developed method for calculating the contour-supported slab of self-stressed concrete. Reinforced concrete slab on the tension cement replaces the traditional construction of the bridge. In this article, in order to exclude reinforcement, the problem of determining the stress-strain state of self-stressed concrete slabs supported along the contour is considered. The values of stresses in the upper and lower faces of the concrete slab, as well as the bending moment in the middle section of the slab
Construction Features Of Transport Tunnels In The Mountain Areas Of Uzbekistan, M.Х. Miralimov, Sh.U. Normurodov
Construction Features Of Transport Tunnels In The Mountain Areas Of Uzbekistan, M.Х. Miralimov, Sh.U. Normurodov
Journal of Tashkent Institute of Railway Engineers
The paper provides information about the transport tunnel 19,2 km long which was recently completed on new electrified railway line “Angren-Pap” in the mountain area of Uzbekistan. It is noted that the most actual for transport tunnels is account of seismic activity of geological environment in the process of design, construction and maintenance. There are given the effects of earthquakes on underground structures and regularities of displacement and stress distribution in the tunnel linings under seismic impacts. The accumulated experience of earthquake-resistant construction in Uzbekistan shows the need to consider several design schemes for the interaction of tunnels in the …
Research Of System Conditions For Formation Of Failure On Mathematical Models By The Results Of The Research Of Reinforced Concrete Bridges, E.T. Yaxshiev, F.Z. Zokirov, A.B. Karimova
Research Of System Conditions For Formation Of Failure On Mathematical Models By The Results Of The Research Of Reinforced Concrete Bridges, E.T. Yaxshiev, F.Z. Zokirov, A.B. Karimova
Journal of Tashkent Institute of Railway Engineers
Based on the data of field surveys, the results of assessing the state of reinforced concrete span structures of bridges and characteristic defects that occur in the structure during operation are presented. An analysis of the results of inspections and periodic inspections responsible for the operation of artificial structures shows that a significant part of reinforced concrete spans has various types of defects and damage to load-bearing structures. Studies show that defects have a significant impact on the operational properties of reinforced concrete spans, leading both to a limitation of the speed regime of train movements and to the emergence …
Development Of A Hybrid Model Of A Thermophotogenerator And An Empirical Analysis Of The Dependence Of The Efficiency Of A Photocell On Temperature, S.I. Zokirov, M.N. Sobirov, H.Kh. Tursunov, M.M. Sobirov
Development Of A Hybrid Model Of A Thermophotogenerator And An Empirical Analysis Of The Dependence Of The Efficiency Of A Photocell On Temperature, S.I. Zokirov, M.N. Sobirov, H.Kh. Tursunov, M.M. Sobirov
Journal of Tashkent Institute of Railway Engineers
This paper presents the results of experiments to analyze the efficiency of the photocell of selective radiation of a photothermogen generator at various densities. It was found that in a relatively hot climate (Uzbekistan, Ferghana), the performance of the solar cell is stable at temperatures from +25 to +35. It was found that the lowest solar cell performance (from single-crystal silicon) was about 6% and 13%, and the highest - about 15% and 16% for typical and selective lighting with triple density in a certain period of time (up to 3 and 15 minutes), respectively. The lux-ampere characteristic is given; …
Diagnostic Method For Current Collectors Of Freight Electric Locomotives In The Conditions Of The Republic Of Uzbekistan, B.B. Abdurakhmanov
Diagnostic Method For Current Collectors Of Freight Electric Locomotives In The Conditions Of The Republic Of Uzbekistan, B.B. Abdurakhmanov
Journal of Tashkent Institute of Railway Engineers
The paper provides a method for diagnosing current collectors of freight electric locomotives in the Republic of Uzbekistan in order to increase the reliability of current collectors, as well as reduce the time for their operation. A large number of failures attributable to current collectors, in particular to current collector inserts, were revealed. Improving the reliability, which will improve the reliability of the electric locomotive as a whole. To date, the electric locomotives of the park of the Republic of Uzbekistan do not have the diagnostic tools to determine the condition of current collector inserts. The article provides an algorithm …
Investigated The Strength Of Rolling Stock As A Fuzzy Function, M.L. Waail, R.V. Rahimov
Investigated The Strength Of Rolling Stock As A Fuzzy Function, M.L. Waail, R.V. Rahimov
Journal of Tashkent Institute of Railway Engineers
In this paper we use Fuzzy Set Theory to solve one of the essential problems in Railway Engineering: estimate the strength of rolling stock. As known, the strength of, any, rolling stock depends upon several factors that cannot determine them accurately. Therefore, we can consider them as fuzzy factors. The strength of any rolling stock can be changed depending on its operating conditions and the intensive of operation, that can consider as fuzzy factors too. A new proposal method developed depending on Fuzzy Set Theory to estimate the strength of mobile equipment or to compare between several rolling stocks for …
Mathematical Models Of Differential Magnetic Circuits Of Converters With Movable Screens And Distributed Parameters, S.F. Amirov, O.T. Boltayev
Mathematical Models Of Differential Magnetic Circuits Of Converters With Movable Screens And Distributed Parameters, S.F. Amirov, O.T. Boltayev
Journal of Tashkent Institute of Railway Engineers
In the article the mathematical models of differential magnetic transducers with movable electromagnetic screens and with distributed parameters, taking into account the magnetic flux scattering, are developed. To develop a mathematical model of the transducer, the distribution expression of magnetic fluxes before the moving and after the moving parts are obtained using the method of magnetic circuit dismemberment, and the resulting magnetic flux is determined by the overlay method. The developed mathematical models showed that the discrepancy between experimental and theoretical results does not exceed 8-11%.
The Model Of Network Bandwidth When Servicing Multi-Service Traffic, О.А. Turdiyev, А.B. Tukhtakhodjaev, E.S. Abdullaev
The Model Of Network Bandwidth When Servicing Multi-Service Traffic, О.А. Turdiyev, А.B. Tukhtakhodjaev, E.S. Abdullaev
Journal of Tashkent Institute of Railway Engineers
An important issue of ensuring the quality of service on multiservice networks is the correct calculation of their capacity. The proposed numerical methods for assessing the quality characteristics in various disciplines of service applications are time-consuming and do not allow you to quickly manage the resources of the network. In this paper, it is proposed to choose the right from an economic point of view, the optimal resource multiservice network
Calculation Of The Frame Of Locomotives Tem2 In Operation, M.Sh. Valiyev, E.H. Astanov
Calculation Of The Frame Of Locomotives Tem2 In Operation, M.Sh. Valiyev, E.H. Astanov
Journal of Tashkent Institute of Railway Engineers
The article considers the frame of TEM-2 locomotives taking into account the stresses arising in the operation processes. The calculation of the frame of the locomotive TEM2 makes it possible to assess the tensile-deformed state of the frame and to give a comparative assessment of the structural strength, reliability and long service life before and after their useful use
Improving The Operation Of The Automatic Temperature Control System For Water And Oil Of Diesel Systems Of A Diesel Locomotive 2te10m, D.N. Kurilkin, A.V. Osipov, K.U. Muminov
Improving The Operation Of The Automatic Temperature Control System For Water And Oil Of Diesel Systems Of A Diesel Locomotive 2te10m, D.N. Kurilkin, A.V. Osipov, K.U. Muminov
Journal of Tashkent Institute of Railway Engineers
Maintaining optimal water and oil temperatures for diesel systems of a diesel engine 2TE10M is carried out by a system of automatic temperature control. How efficiently this regulation system works will determine the quality of the diesel generator set. Evaluation of the effectiveness of the automatic temperature control system was carried out on the basis of the use of diesel power allocated to the cooling chamber fan drive. The fan drive of the refrigeration chamber of the 2TE10M diesel locomotive includes a hydromechanical gearbox with a fluid coupling of variable filling, for which development of a mathematical model, refinement of …
To Analysis Of The Stressed Condition And Long Durability Of Cylindrical And Conic Pipes Of Polymeric Materials, A. Abdusattarov, F.E. Abduqodirov, D.N. Shamsiyev
To Analysis Of The Stressed Condition And Long Durability Of Cylindrical And Conic Pipes Of Polymeric Materials, A. Abdusattarov, F.E. Abduqodirov, D.N. Shamsiyev
Journal of Tashkent Institute of Railway Engineers
The article considers the solution of the problem of long-term strength and damage of a conical pipe and a hollow cylinder bonded to a thin-walled shell under the action of internal pressure, taking into account the influence of visco-elastic properties of the material on the stress-strain state