Transport engineering最新文献_第2页

ON SOME RESULTS OF PERFORMANCE ANALYSIS OF SURFACE HEAT EXCHANGE OF TRANSVERSE FLOW TUBE BUNDLES OF CYLINDRICAL PIPES AND PROFILED CHANNELSWITH COMPLEX CONFIGURATION IN THE AIR FLOW 关于气流中具有复杂结构的圆柱形管束和异型槽横向流动管束的表面热交换性能分析的一些结果

Transport engineering Pub Date : 2024-05-12 DOI: 10.30987/2782-5957-2024-5-10-21

Andrey Anisin, Aleksandr Anisin, Valentina Androsenko

引用次数: 0

ROTARY-TABLE INSTALLATION FOR LIFE TESTS OF ABRASIVE WEAR 用于磨料磨损寿命试验的转台装置

Transport engineering Pub Date : 2024-05-12 DOI: 10.30987/2782-5957-2024-5-22-28

Marat Abzhaev

{"title":"ROTARY-TABLE INSTALLATION FOR LIFE TESTS OF ABRASIVE WEAR","authors":"Marat Abzhaev","doi":"10.30987/2782-5957-2024-5-22-28","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-5-22-28","url":null,"abstract":"When developing new methods to make hardening coatings on the cutting tool surfaces of tilling machines, the main characteristic parameter determining the ability to serve for a long time, resisting external environmental influences and mechanical wear, is wear resistance. At the same time, this parameter should be determined before life tests in the field. Various stands and installations are available for this purpose. Each of them is characterized by their own advantages and disadvantages. Therefore, based on the specific production conditions, new devices are being developed. In this paper, a rotary-table installation of a specific design is developed for life tests of abrasive wear of various parts. A patent is obtained for it. The differences of this installation from existing analogues are the following: 1 – the pressure of the abrasive material layer on the test sample is regulated by deepening the sample into the abrasive medium; 2 - the test sample is under constant influence of the abrasive material by filling it with the required amount of abrasive materials; 3 – higher efficiency of the installation. This is achieved due to lower power consumption in the absence of friction forces between the sample bracket and the abrasive material. \u0000Comparative life tests were carried out for two harrow teeth, the original tooth and the hardened one. The harrow teeth were tested on a simplified model of a developed installation. An experimental inverter vibration control unit of Kazan Federal University was used for treatment. Hardening was performed with a multi-rod electrode at an arc current of 60A. The frequency of the electrode vibration is 100 Hz. Tests show that the service life of hardened harrow teeth when treated by a vibrating arc with a multi-rod electrode is about 5-6 times higher than the service life of factory harrow teeth.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"112 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140987004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

COMPARATIVE PARAMETERS OF PRODUCING RAILWAY ROLLING STOCK COIL SPRINGS 生产铁路车辆螺旋弹簧的比较参数

Transport engineering Pub Date : 2024-05-12 DOI: 10.30987/2782-5957-2024-5-50-55

V. Fedin, Anvarjon Boymatov, Aleksandr Fimkin, S. Korzhin

引用次数: 0

SELECTION OF TECHNICAL PARAMETERS OF SHOCK ABSORBING DEVICE ELEMENTS THAT DETERMINE ITS SAFETY 选择决定减震装置安全性的技术参数

Transport engineering Pub Date : 2024-05-12 DOI: 10.30987/2782-5957-2024-5-29-39

Igor' Romanov, Aleksandr Luk'yanchuk

{"title":"SELECTION OF TECHNICAL PARAMETERS OF SHOCK ABSORBING DEVICE ELEMENTS THAT DETERMINE ITS SAFETY","authors":"Igor' Romanov, Aleksandr Luk'yanchuk","doi":"10.30987/2782-5957-2024-5-29-39","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-5-29-39","url":null,"abstract":"The problems to plan and ensure a given level of reliability of mechanical systems at all stages of their design and operation occupy an important place in the problem of ensuring the quality of machine-building products. With a significant number of scientific methods and approaches to solving theoretical and applied issues of reliability theory, one of the key directions is to determine the reliability indicators of technical systems and their elements, in particular a wide range of products including sliding friction pairs with periodic impacts. \u0000The study of failure origins, from the point of view of physical-mechanical processes occurring in surface layers of elements, under the influence of external factors, allows selecting parameters characterizing the functional state of the pair, and, as a result, its reliability. For example, for sliding friction pairs with periodic impacts, such a parameter is the geometric dimensions of the conjugate elements. \u0000The decrease in the geometric dimensions of conjugate elements, due to wear, characterizes the rate of change of the initial parameter values to the maximum permissible ones determining the failure, and can be approximated by linear, power, exponential and other dependencies obtained from actual measurements. According to the obtained functional dependencies of parameter changes over operating time, it makes possible to determine the norm for the parameter regulating their pre-failure state, beyond which failure prediction is possible with varying probability, and, as a result, the reliability of the system as a whole. \u0000The use of this method to reliability forecasting through the determination of the pre-failure state of the system can be projected onto technical objects, which performance indicators are geometric parameters that ensure the performance, first of all, of the functions of the elements themselves and the entire technical system, and worn out during operation.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"108 48","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140987056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IMPROVEMENT OF THE REPAIR SYSTEM AND MAINTENANCE OF LONG-DISTANCE PASSENGER CARS 改进长途客运汽车的维修系统和保养工作

Transport engineering Pub Date : 2024-05-12 DOI: 10.30987/2782-5957-2024-5-62-69

Andrey Shinkaruk

{"title":"IMPROVEMENT OF THE REPAIR SYSTEM AND MAINTENANCE OF LONG-DISTANCE PASSENGER CARS","authors":"Andrey Shinkaruk","doi":"10.30987/2782-5957-2024-5-62-69","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-5-62-69","url":null,"abstract":"The existing systems of maintenance and scheduled preventive maintenance of passenger rolling stock used for long-distance passenger traffic with speeds up to 140 km/h are considered. Promising areas for their improvement are identified. A combined repair system is proposed, which provides a uniform approach of the rolling stock to the position of a single technical audit and scheduled preventive maintenance without taking into account its mileage. The replacement of the element base, when the mileage criteria are met, is carried out on repair and equipment tracks or specially equipped positions during the technical preparation of the rolling stock at the initial point. The proposed system, in comparison with existing ones, reduces the need for depot repairs; the cost of carrying out scheduled repairs of cars, the time spent by cars in an idle fleet, and also provides opportunities for additional operation of the car at the operational stage of the life cycle. Also, the proposed system allows regulating the frequency of the element base replacement of passenger cars with a designated service life of 40 years, including them in the mandatory requirements for the necessary periodic replacement during capital repairs of the car every 5 years.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"108 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140986716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

COMPARATIVE ESTIMATES OF PROMISING NIPPLE DRINKERS FOR POULTRY 对有前途的家禽用乳头饮水器的比较估计

Transport engineering Pub Date : 2024-05-12 DOI: 10.30987/2782-5957-2024-5-70-77

Viktor Saitov, Bahruz Allakhverdiyev

{"title":"COMPARATIVE ESTIMATES OF PROMISING NIPPLE DRINKERS FOR POULTRY","authors":"Viktor Saitov, Bahruz Allakhverdiyev","doi":"10.30987/2782-5957-2024-5-70-77","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-5-70-77","url":null,"abstract":"The problem of watering poultry with water is analyzed. The aim of the study is to choose the design of a nipple drinker for poultry when they are with cage kept. In accordance with this, in order to develop a modern nipple drinker for poultry that meets the sanitary and technical requirements of the poultry housing, a comparative analysis of existing nipple drinker designs is carried out. A nipple drinker for poultry of cage keeping is developed. The tests conducted on broilers show that the nipple drinker meets the physiological needs of poultry in water and is reliable in operation while reducing the cost of its preventive maintenance. The nipple drinker has a low water consumption during batch feeding, is hygienic in use, improves the sanitary condition of the poultry room, increases the live weight of broilers by 3...5%. \u0000The developed nipple drinker for poultry in comparison with its closest analogues has a simple design, low labor intensity of manufacture, the possibility of self-purification from salt deposits on the inner surface of the device regulating the flow of water, increases reliability in operation and reduces water losses by its portion supply, improves the sanitary condition of the room for keeping poultry.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"111 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140987027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

INFLUENCE OF IMPURITIES ON THE DEGRADATION OF COMPOUNDS IN Al – Au SYSTEM 掺杂物对铝-金体系中化合物降解的影响

Transport engineering Pub Date : 2024-03-13 DOI: 10.30987/2782-5957-2024-3-70-84

Konstantin Makarenko, Irina Kotlyarova

{"title":"INFLUENCE OF IMPURITIES ON THE DEGRADATION OF COMPOUNDS IN Al – Au SYSTEM","authors":"Konstantin Makarenko, Irina Kotlyarova","doi":"10.30987/2782-5957-2024-3-70-84","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-3-70-84","url":null,"abstract":"Typical reasons for degradation of micro–welded bimetallic compounds of the aluminum-gold binary system are considered. These types of compounds are often used in the manufacture of semiconductor products (SCPs) and integrated circuits (ICs). Degradation of compounds, revealed during screen tests or during products operating, leads to failures, which dramatically reduces the reliability of electronic equipment (EE). The majority of degradation processes are based on diffusion phenomena, which are mainly determined by temperature, chemical composition and microstructure of metals and alloys. Impurity elements included in the gold coating have a significant effect on the degradation of the wire connections such as crystal contact pads – traverses of package terminals of SCPs. In this regard, it is worth analyzing the effect of various impurities on the diffusion processes and changes in the microstructure of the coating in order to find out the most dangerous chemical elements and determine their role in the degradation of compounds. The paper presents a review of references on the research subject. In the conclusion, the results of analysis in the field of the influence of impurity elements on the degradation of compounds in Al – Au system are summarized, conclusions are drawn about the key role of grain-boundary diffusion on the degradation of micro-welded bimetallic compounds.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140245242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

STUDY OF THE EFFECT OF ADDING FINE PHASE OF TITANIUM CARBIDE SYNTHESIZED IN THE MELT, AND HEAT TREATMENT ON THE STRUCTURE AND PROPERTIES OF AM4.5Kd ALLOY 研究在熔体中加入细粒碳化钛并进行热处理对 AM4.5Kd 合金结构和性能的影响

Transport engineering Pub Date : 2024-03-13 DOI: 10.30987/2782-5957-2024-3-59-69

Yulia V. Sherina

{"title":"STUDY OF THE EFFECT OF ADDING FINE PHASE OF TITANIUM CARBIDE SYNTHESIZED IN THE MELT, AND HEAT TREATMENT ON THE STRUCTURE AND PROPERTIES OF AM4.5Kd ALLOY","authors":"Yulia V. Sherina","doi":"10.30987/2782-5957-2024-3-59-69","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-3-59-69","url":null,"abstract":"The study results are given which are devoted to finding the effect of reinforcement with fine phase of titanium carbide in the amount of 10 masses% on the physico-mechanical and tribotechnical properties of industrial aluminum AM4.5Kd alloy. The physico-mechanical (density, porosity, coefficient of thermal linear expansion, hardness, microhardness) and tribotechnical (wear rate, friction factor, self-heating temperature) properties of the composite material AM4.5Kd-10%TiC obtained by self-propagating high-temperature synthesis before and after heat treatment are analyzed. It is found out that composite samples after heat treatment have a good combination of physical and mechanical properties, namely a low level of porosity, a low value of the coefficient of thermal linear expansion, and the values of hardness and microhardness are increased twice. Special attention should be paid to the fact that reinforcement with a ceramic phase in combination with heat treatment leads to a significant increase in the level of wear resistance of the matrix alloy (by 9 times) and a decrease in the friction factor (by 4 times). Thus, according to the results of the studies conducted, the resulting composite material AM4.5Kd-10%TiC can be recommended as a material used in tribological assemblies.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"600 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140246623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IMPROVING THE EFFICIENCY OF BALL AND ROLLER GEARS BY OPTIMIZING GEOMETRICS OF ENGAGEMENT PARTS 通过优化啮合零件的几何形状，提高滚珠和滚柱齿轮的效率

Transport engineering Pub Date : 2024-03-13 DOI: 10.30987/2782-5957-2024-3-20-30

Aleksandr Kapitonov

{"title":"IMPROVING THE EFFICIENCY OF BALL AND ROLLER GEARS BY OPTIMIZING GEOMETRICS OF ENGAGEMENT PARTS","authors":"Aleksandr Kapitonov","doi":"10.30987/2782-5957-2024-3-20-30","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-3-20-30","url":null,"abstract":"Studies related to increasing the efficiency of new planetary gear designs with intermediate rolling bodies, balls and rollers of tire wearing surface with higher kinematic and dynamic characteristics are presented. The most effective way to increase the efficiency of these gears is to optimize the geometrics of engagement parts, which include lifting angles, amplitude and average radius of tire wearing surface. A technique is developed and mathematical dependencies are obtained that allow determining the optimal geometrics of planetary ball and roller gears to increase their efficiency. The power losses at lifting angles of tire wearing surface providing the highest transmission efficiency are calculated for each link of the studied planetary gears constructed according to a single kinematic scheme. The dependences of power losses of planetary ball and roller gears on lifting angles of the leading tire wearing surface are obtained. The highest values of transmission efficiency are determined depending on the optimal lifting angles of the leading tire wearing surface and the gear ratio. The optimal values of average tire wearing surface radius and amplitude are found out, and their best ratios are obtained, ensuring the highest transmission efficiency. The calculation results of geometrics providing the highest efficiency of new planetary ball and roller gear designs are presented.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140245964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

COMPARATIVE ANALYSIS OF USING COUPLING FLUIDS IN FLAW DETECTION ON THE EXAMPLE OF ULTRA-SOUND CONTROL OF AN ALL-ROLLED WHEEL SURFACE 以全轧制车轮表面超音波控制为例，对使用耦合流体进行探伤的比较分析

Transport engineering Pub Date : 2024-03-13 DOI: 10.30987/2782-5957-2024-3-4-11

Aleksandr Otoka, Oleg Holodilov

{"title":"COMPARATIVE ANALYSIS OF USING COUPLING FLUIDS IN FLAW DETECTION ON THE EXAMPLE OF ULTRA-SOUND CONTROL OF AN ALL-ROLLED WHEEL SURFACE","authors":"Aleksandr Otoka, Oleg Holodilov","doi":"10.30987/2782-5957-2024-3-4-11","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-3-4-11","url":null,"abstract":"Coupling fluids are important flaw detection materials that are used during ultrasonic testing in order to find out acoustic contact between the piezoelectric transducer and the object of control. The paper considers coupling fluids of various viscosities that can be used as a coupling medium for ultrasonic flaw detection. A comparative analysis of the effect of the studied coupling fluids on the sensitivity of the control is carried out, which is determined by the attenuation of the transmitted ultrasonic signal through the roll surface of the car wheelset wheel. The control sensitivity is assessed on the flat and inclined surfaces of the all-rolled wheel. The introduction of ultrasound into the wheel material (steel 2) is carried out by an inclined piezoelectric transducer at an angle α = 900, with an oscillation frequency f = 0.4 MHz. It is found out that by providing a reliable constant force of the ultrasonic transducer P121-90-0.4 due to the permanent magnets built into it, an increase in the viscosity of the coupling fluid can significantly affect the amplitude of the received echo signals. During the research, it is found that low-viscosity coupling fluids are characterized by stable coupling regardless of the time and clamping force of the transducer, in contrast to high-viscosity coupling media, when using them sharp fluctuations in the overall gain of the second through signal in AGC zone are observed on the flaw detector screen. Therefore, in practice, the use of high-viscosity coupling media leads to a sharp increase in signal amplification (amplitude), which may result in over reject.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"1981 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140246740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0