Наукові вісті Далівського університету № 21

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Browsing Наукові вісті Далівського університету № 21 by Subject "freight car"

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    Safe Operation of Trains With a Device for Controlling the Position of the Wheelset on the Rail Track
    (СНУ ім. В. Даля, 2021) Mogila, V.; Kovtanets, M.; Sergіenko, O.; Kovtanets, T.; Могила, В.; Ковтанець, М.; Сергієнко, О.; Ковтанець, Т.
    Driving characteristics are the most important characteristics that determine the functional properties of passenger and freight cars. The driving performance indicators of cars mainly depend on their dynamic characteristics, but in each specific case, when it comes to compliance with traffic safety conditions, it is necessary to take into account the design features and the state of keeping the track. One of the main indicators of driving performance for the rolling stock of the track 1520 mm is the derailment stability factor of the wheelset, which determines the conditions for the safe movement of the car to provide for conditions under which there is a threat of derailment of the wheelsets. The design of the freight car bogie model 18-100 is considered and the reasons are investigated when the wheel can roll onto the rail head and the wheelset derails. That is, when the critical speed is reached, there is a direct threat to traffic safety. It has been established that in order to improve the smoothness of the movement of trains, reduce the intensive wear of the wheel flange and reduce the risk of wheels entering the rails, it is necessary to constantly monitor the position of the wheelset on the track. In the study of the multifactorial problem of a car derailment, the question of the optimal ratio of geometric dimensions in the wheel-rail pair was also taken into account. The ratio of geometric dimensions between the rail track and the wheel track determines the conditions for the movement of the crew in straight sections of the track and the conditions for their fitting into curved sections. Based on the results obtained, a design and technological solution is proposed - a device for monitoring the position of the wheelset on the track, which will monitor and timely assess the position of the wheelset on the track, as well as identify the mechanical risks of rolling stock derailment to improve traffic safety. The proposed approach to assessing the risk of rolling stock derailment is recommended to be used to quickly determine the significance of derailment factors and form reasonable requirements and real actions that ensure a guaranteed level of train traffic safety.