Abstract
Methods to increase mine train mass allowable for braking have been studied. Possibility to use rail magnetic brakes to improve efficiency of dynamic braking has been analyzed. Mathematical model of the train braking involving a magnetic rail device to increase locomotive axial load has been proposed. Results of the braking calculations with the use of the modeling results have made it possible to conclude on the fact that a magnetic rail device used to increase locomotive axial load allows improving considerably braking characteristics of a locomotive and increasing mine train mass allowable for braking.
Highlights
Under conditions of global growth of the human needs in resources, a task of efficient operation of mining enterprises becomes rather important [1, 2]
Modeling conditions are as follows: electric locomotive type is АRP10RV; train mass is 58 t; track slope is 35‰; initial braking velocity is 3 m/s; rails are covered with dirt; braking is of motor type; additional vertical load is transmitted on the axis from the effect of a magnetic rail device
The research solves topical problem of the increase in train mass allowable for braking by means of the growing efficiency of service braking in terms of simultaneous use of dynamic braking and a magnetic rail device
Summary
Under conditions of global growth of the human needs in resources, a task of efficient operation of mining enterprises becomes rather important [1, 2]. Productive capacity of locomotive transport may be improved by means of the train mass increase. Calculations performed in the context of Western Donbas mines have shown that in terms of standard routes, train mass growth by 10% results in the hourly productivity gain of a locomotive by 7.4% while increased average train velocity by 10% demonstrates only 3.1% of the productivity gain. Value of braking force implemented by a train is the basic factor determining the possibility of a stop and, allowable train mass. Attempts to develop rail brakes with the possibility to regulate braking force were not successful since the introduction of a magnetic unit of additional devices into the structure resulted in the complicated operation and reduced reliability being unacceptable for braking systems, especially in terms of industrial transport operation
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