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Wyszukujesz frazę "wheel-rail profile" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Examination of selected geometrical parameters of wheelsets of electric multiple unit
Autorzy:
Grzywna, Maciej
Szkoda, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/2203892.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
rail vehicles
geometrical parameters
wheel profile
pojazdy szynowe
parametry geometryczne
profil koła
Opis:
The aim of the work is to investigate changes in the values of selected geometrical parameters of electric multiple unit (EMU) wheelsets as a function of mileage. Based on the conducted analysis of the literature, it was found that the problem of proper diagnostics and maintenance of wheelsets, as an element that directly affects the level of safety of railway vehicle traffic, is very up-to-date and justified. This work presents the characteristics of the geometrical parameters of the wheelset that were subjected to the tests. According to the terminology of EN 13715:2020-12, the geometrical parameters of the wheelset subjected to tests were characterized. As part of the research work, data from measurements of the values of the main geometrical parameters of the outer contour of the wheelsets were collected and systematized from 204 measurement sheets of vehicles. Data were collected from specially developed registers and databases. The research and analyses confirm the existence of a correlation between changes in the values of diagnostic characteristics of flange thickness and height and flange steepness as a function of kilometrage. The intensity of wheel rim wear changes depending on the conditions under which the vehicle is operated. The wheelsets’ diagnostic characteristics were not fully predictable, which makes it difficult to forecast their future values. Based on the obtained results, actions that increase the durability of the wheels were proposed. For example, it is reasonable to assign vehicles to different routes so that the wheel rims wear evenly, eliminating the need for the subsequent accumulation of repairs and wheelset replacements before repair at the P4 level. Moreover, it is advisable to undertake work on the change of identification of basic individual primary characteristics of the wheel’s external contour into primary characteristics of a collective nature. As a result of such action, it is possible o indicate the probability of occurrence of non-uniformity of values of diagnostic characteristics on the wheel circumference could be limited and the phenomenon of occurrence of measurement errors could be minimized.
Źródło:
Transport Problems; 2022, 17, 2; 161--174
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlation between the main diagnostic features of rail vehicles’ wheel profiles in the operational period
Autorzy:
Brzeźny, Andrzej
Potępa, Piotr
Sowa, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/215283.pdf
Data publikacji:
2019
Wydawca:
Instytut Kolejnictwa
Tematy:
operational tests
rail vehicles
diagnostic features
wheel profile
Pearson’s correlation coefficient
Opis:
The paper is dedicated to correlations between the main diagnostic features utilised for assessing the wear of wheel tyre running treads and the wear of wheel flanges. The paper focuses on analysis of the correlations between these features in the period between the mounting of new wheel tyres or new monoblock wheels in a given wheelset up to their replacement. The wheels of Electric Multiple Units and shunting locomotives were the objects of the research. The measurement data obtained from a domestic railway undertaking contain, however, many errors. It was noted that in some cases the measured values were put in the wrong places on the measurement cards. It is also possible that in some cases the wheel surfaces were not prepared properly for measurements. For those reasons, only some data, for which there were no doubts regarding credibility, were chosen. Those data were appropriate for determining the trend line equations, which depict an overview of how the values of the diagnostic features are correlated with each other. The obtained functions of the characteristics of the changes in the diagnostic features as well as calculated Pearson correlation coefficients show that there is a significant correlation between those features. This is not dependent on the significantly different operational conditions of the groups of tested rail vehicles. Conclusions on the existence of significant correlations between the tested features can be used for the creation of innovative solutions dedicated for wheel diagnostics of rail vehicles. This especially applies to the design of analytical functions, which could be used for real time verification of the correctness of the measurement results.
Źródło:
Problemy Kolejnictwa; 2019, 183; 99-105
0552-2145
2544-9451
Pojawia się w:
Problemy Kolejnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving of operating ability of wheels and rail tracks
Coversenstvovanie eksplyatacionnyh sposobnostej koles i relsovyh pytej
Autorzy:
Tumanishvili, G
Nadiradze, T
Tumanishvili, I
Powiązania:
https://bibliotekanauki.pl/articles/374156.pdf
Data publikacji:
2014
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
wheel-rail profile
rail fastening
rolling
sliding
wear
profil koła
przytwierdzenie kolejowe
walcowanie
tarcie ślizgowe
zużycie
Opis:
The high cost of wheels and rails due to wear and rolling contact fatigue is one of the main problems in the railway transport. The values of creepage, sliding distance and wear rate of wheels and rails at rolling of a wheel on the rail greatly depend on geometric characteristics of working profiles of wheels and rails and location of wheels relative to rails. In the present work the functional requirements of various parts of profiles of wheels and rails and dominating kinds of their damage in various operating conditions are considered and a new profile of a wheel and device for fastening of rails are offered.
Высокая стоимость ремонтно-профилактических работ колес, из-за износа и усталостного повреждения является одным из главных проблем на железодорожном транспорте. При качении колеса на рельсе величина относительного скольжения и интенсивность изнашивания колес и рельсов значительно зависят от геометрических особенностей рабочих профилей колес и рельсов и взаимного расположения рельсов относительно колес. В данной работе рассматриваются функциональные требования различных частей профилей колес и рельсов и доминирующие виды их повреждения при различных условиях работы и предложены новые профили колес и устройства закрепления рельсов.
Źródło:
Transport Problems; 2014, 9, 3; 99-105
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rail vehicle wheels common faults characteristic
Kharacteristika rasprostraennykh neispravnostejj koles relsovykh ehkipazhejj
Autorzy:
Makhortova, N.
Vivdenko, Y.
Powiązania:
https://bibliotekanauki.pl/articles/792917.pdf
Data publikacji:
2012
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
wheel
fault
rail vehicle
undercarriage
rim
profile
vehicle
railway transport
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 4
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
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