Main directions of improvement of the method for calculation of idle time of cars at technical stations

Ischuka, Oksana; Lomotko, Denis; Freimane, Julija; Sansyzbajeva, Zura

doi:10.1016/j.procs.2019.01.165

Cited by 3 publications

(1 citation statement)

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“…According to the data presented in the reports on unscheduled repairs by the railway JSC "Pasažieru vilciens" for the period from 2015 to 2022, 239 cases of unscheduled repairs of the ER2 series train motor cars were identified due to traction gear failures, of which 58 cases were rupture of the rubber-cord coupling shell [6]. That is 20% of the total number of traction gear failures [10]. Analysis of statistical data is shown in Figure 2.…”

Section: Methodsmentioning

confidence: 99%

Failure analysis of rubber-cord couplings of ER2 series electric trains

Gorbacovs

Gavrilovs

Eiduks

et al. 2023

22nd International Scientific Conference Engineering for Rural Development Proceedings

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The article analyzes the statistics of rubber-cord coupling failures during 2015 till 2022. The analysis of failures shows that prevailing cases are rupture of the rubber-cord coupling side surface. It should be noted that the cost of eliminating the consequences of a rubber-cord coupling rupture is on average 575.21 EUR for one unscheduled repair. To study the possible reasons of the rubber-cord coupling rupture, the couplings removed from the motor cars after unscheduled repairs were taken. In the process of research, the warming temperature of the rubber-cord coupling, hardness at various temperatures and forces acting on the rubber-cord coupling during operation, i.e. the operational conditions of the rubber-cord coupling were determined. The purpose of these studies is to determine the possible causes of the rubber-cord coupling side surface. The research process of rubber-cord couplings consisted of four stages. 1. Determination of the geometric dimensions of the coupling and comparison of the obtained data with the data of ISO 14691:2008. 2. Theoretical determination (calculations) of: torque, centrifugal force, shear stress and radial load acting on the coupling. 3. Determination of hardness on the Shore A scale depending on the temperature of the rubber-cord coupling in three temperature ranges t = -20 °C; 0 °C; + 22 °C; + 60 °C in the RTU laboratory. Comparison of the obtained data with the data of ISO 14691:2008. 4. Drawing the main conclusions about the possible causes of rupture of the rubber-cord coupling. The purpose of these studies is to determine the possible causes of the rubber-cord coupling side surface. The forces and stresses acting in the zones of damage to rubber-cord couplings are determined. According to the results of calculations, the values of the forces Рс; Рс1 and stresses τk caused by the torque Ma acting on the rubber-cord coupling in the destruction zones and the values of forces and stresses capable of causing the destruction of rubber-cord couplings are determined. In the article hardness of the rubber-cord coupling was also studied at various temperature conditions.

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Section: Methodsmentioning

confidence: 99%