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Wyszukujesz frazę "Sergejevs, D." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Resisting momentum in the abutment to rotating of freight car bogie
Autorzy:
Sergejevs, D.
Gavrilovs, P.
Powiązania:
https://bibliotekanauki.pl/articles/374974.pdf
Data publikacji:
2008
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Opis:
On the Latvian railway, derailments of freight cars take place in the course of shunting work on marshalling yards. A number of factors during shunting work on marshalling yards may contribute to the derailments of rolling stock: longitudinal dynamics during braking of cars with the turned off brakes by locomotive, hauling down cars from a marshalling hill with braking position controlled by an operator, dry internal rails in curves, absence of greasing in the pivot unit of freight bogies. At present, measures allowing elimination of the car derailments during shunting work are developed. During the period between repairs, the abutment unit of freight car often works in conditions of dry friction. Our observations suggest that at the time of taking a car into repair, there is often an absence of greasing between trail bearing and center plate of the abutment, and a presence of sandy dust. It increases a friction and, together with high contact pressures and dynamic influence, hinders the turn of bogie at motion of car. In this paper, the results of studying the resisting moment in the abutment to turning of bogie is reported. The study was conducted on the basis of freight bogie of type 18-100; the body was leant on the center plate unit of the abutment, on the center plate unit, and on the sliders. Experiments were conducted, with the use of greasing and at the dry friction of center plate unit.
Źródło:
Transport Problems; 2008, 3, 4; 65-71
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of factors affecting fractures of rails welded by alumino-thermic welding
Autorzy:
Sergejevs, D.
Mikhaylovs, S.
Powiązania:
https://bibliotekanauki.pl/articles/375035.pdf
Data publikacji:
2008
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
kolej łotewska
spawanie
Latvian railway
welding
Opis:
On Latvian Railway the use of the alumino-thermic welding is widespread using the Elektro-Thermit Company technology. Today it is a basic method for rail joints on railway switches. The analysis of the metal structure in the thermic welding and in the thermic welded zone of rails showed that the weld metal had inclusions small pores and nonmetallics. Pores and nonmetallics are not reduce hardness but it is concentrators of stresses and sources of cracks development.
Źródło:
Transport Problems; 2008, 3, 4; 33-37
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the restoration process of surfaces of railway turnout elements by build-up welding
Autorzy:
Sergejevs, D.
Tipainis, A.
Gavrilovs, P.
Powiązania:
https://bibliotekanauki.pl/articles/312817.pdf
Data publikacji:
2013
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
railway turnout
welding technology
Opis:
The practice has show that restoration of the surface of railway turnout elements by a build-up welding very often is unsuccessful due to subsequent origination of areas of premature destructions such as shivers, stratification, spalling, a.o. Experimental study revealed that causes of the defects are due to welding technology violations and ineffective turnout element existing defect diagnosis methods applied.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2013, 14, 3; 269-271
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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