Hovorukha A.V. Improvement of the service life and stability of rail vehicles in the mining and industrial sector by means of friction modifiers

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Parent Category: Geo-Technical Mechanics, 2023

Category: Geo-Technical Mechanics, 2023, Issue 165

Geoteh. meh. 2023, 165, 151-168

https://doi.org/10.15407/geotm2023.165.151

 

IMPROVEMENT OF THE SERVICE LIFE AND STABILITY OF RAIL VEHICLES IN THE MINING AND INDUSTRIAL SECTOR BY MEANS OF FRICTION MODIFIERS

Hovorukha A.V.

M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine

UDC 622.025:621.8.0.005

Language: English

Abstract. The scientific work includes the study of the impact of friction modifiers on reducing wear intensity, extending the service life, and improving the safety of technical equipment in mining and industrial railway transportation, particularly under challenging operational conditions with small curve radii. Mathematical modeling of dynamic interactions between the railway track and moving transport vehicles was conducted taking into consideration spatial vibrations of the transportation system in vertical, lateral, and longitudinal directions. Dependencies were established between the dynamics indicators of transport vehicles and railway tracks based on the speed of movement along connection joints of the jointed rail track with irregularities, as well as the relationship between the wear intensity of working surfaces and variations in friction coefficient values.
The purpose of the study is to extend the service life, stability, and safety of operation of technical equipment in mining and industrial railway transportation by reducing the friction coefficient. The methodology of the work includes methods of mathematical and computer modeling of dynamic interactions between mining rail transport vehicles and the railway track, which affect the side wear of rail heads and wheel treads. The obtained results of theoretical research on the influence of friction coefficient parameters between the side surfaces of rail heads and wheel treads on the dynamic indicators of interactions between transport vehicles and the railway track, as well as wear indicators of the "wheel-rail" pair, are presented. It is determined that reduce of the friction coefficient from 0.25 (dry friction) to 0.05 (use of friction modifiers) results in a 3.5–4.5 times decrease in wear indicators and a 1.3–1.5 times increase in stability against derailment of wheels. It is found that replace of the connection joints of rails with jointless track in curves with small radii leads to a reduction of horizontal loads by 15–56%, and the coefficient of safety margin against derailment of wheels increases by 19–26%. The obtained results are intended for the implementation of new friction modifiers and technologies in mining and industrial rail transport to enhance the economic efficiency and service life of moving transport vehicles and rail tracks, improve safety of their operation and work of specialists in railway transport.
Keywords: mining and industrial rail transport, service life, wear, friction coefficient, curved track sections.

 

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About the author:

Hovorukha Andrii Volodymyrovych, Master of Sciences, 1st Class Engineer of the Department of Geomechanical Foundations of Surface Mining Technologies, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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