Establishing a pattern in the influence of two-layer greasing on the wear resistance of rails

Authors

DOI:

https://doi.org/10.15587/1729-4061.2020.204201

Keywords:

graphite powder, two-layer greasing, wheel‒rail, tribological system, wear resistance, aerosol

Abstract

This paper reports the results of an experimental study into the influence of two-layer greasing, formed from the graphite powder and base molecules of industrial oil, on the durability of the side surface of a rail head. Thus, increasing the concentration of graphite powder in oil from 0 to 3 % under a load of 363‒646 N decreases a wear rate by 42‒29.7 %, respectively.

The study procedure implied modeling the process of rolling friction at slippage using rollers at the SMC-2 friction machine. This particular type of friction occurs in the tribosystem wheel flange the side surface of a rail head in the curved track sections. The supply of oil applying an aerosol technique was also implied. Two independent factors were varied: the concentration of graphite powder in the industrial oil I-12A and an external load. The constant factors were the roller rotation frequency, which enabled stable slippage at the level of 20 %, and oil temperature, and the duration of each test.

The results of the experiment have made it possible to derive a regression equation, which describes the wear pattern of a roller in the friction pair «roller‒roller» depending on the selected factors.

At the final stage of this work, we calculated a rail resource in the curved track section. The results of calculating a railroad rail resource under conditions of increasing the concentration of graphite powder from 0 to 3 % at external loads from 363 to 646 N have demonstrated an increase in the rail resource from 40 to 61 %. The calculation was based on the obtained experimental data, which characterize the friction process between the side surface of a rail head and the wheel flange in a curved track section under the conditions of two-layer greasing at various loads. The two-layer greasing was formed through the aerosol application of oil onto the friction surface with a different concentration of graphite.

The data obtained make it possible to predict the service life of rails in the curved track sections under conditions of two-layer greasing

Author Biographies

Serhii Voronin, Ukrainian State University of Railway Transport Feierbakha sq., 7, Kharkiv, Ukraine, 61050

Doctor of Technical Sciences, Professor, Head of Department

Department of Construction, Track and Cargo Handling Machines

Besir Asadov, Azerbaijan Railways Closed Joint Stock Company Dilara Aliyeva str., 230, Baku, Azerbaijan, AZ1010

Engineer, Head of Wagon Service

Dmytro Onopreichuk, Ukrainian State University of Railway Transport Feierbakha sq., 7, Kharkiv, Ukraine, 61050

PhD, Associate Professor

Department of Construction, Track and Cargo Handling Machines

Volodymyr Stefanov, Ukrainian State University of Railway Transport Feierbakha sq., 7, Kharkiv, Ukraine, 61050

PhD, Associate Professor

Department of Construction, Track and Cargo Handling Machines

Ivan Hrunyk, Regional Branch «Lviv Railway» JSC «Ukrzaliznytsia» Hoholia str., 1, Lviv, Ukraine, 79007

PhD

Viktor Pashchenko, National Academy of the National Guard of Ukraine Zakhysnykiv Ukrainy sq., 3, Kharkіv, Ukraine, 61001

PhD

Department of Tactics

Oleh Zabula, National Academy of the National Guard of Ukraine Zakhysnykiv Ukrainy sq., 3, Kharkіv, Ukraine, 61001

PhD, Associate Professor

Department of Artillery Wepons

Oleh Holovan, National Academy of the National Guard of Ukraine Zakhysnykiv Ukrainy sq., 3, Kharkіv, Ukraine, 61001

PhD

Department of Tactical Special Training

Yurii Chernichenko, National Academy of the National Guard of Ukraine Zakhysnykiv Ukrainy sq., 3, Kharkіv, Ukraine, 61001

Associate Professor

Department of Artillery Wepons

Oleksandr Kharkivskyi, Ukrainian State University of Railway Transport Feierbakha sq., 7, Kharkiv, Ukraine, 61050

Postgraduate Student

Department of Construction, Track and Cargo Handling Machines

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Published

2020-06-30

How to Cite

Voronin, S., Asadov, B., Onopreichuk, D., Stefanov, V., Hrunyk, I., Pashchenko, V., Zabula, O., Holovan, O., Chernichenko, Y., & Kharkivskyi, O. (2020). Establishing a pattern in the influence of two-layer greasing on the wear resistance of rails. Eastern-European Journal of Enterprise Technologies, 3(1 (105), 85–91. https://doi.org/10.15587/1729-4061.2020.204201

Issue

Vol. 3 No. 1 (105) (2020): Engineering technological systems

Section

Engineering technological systems

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Copyright (c) 2020 Serhii Voronin, Besir Asadov, Dmytro Onopreichuk, Volodymyr Stefanov, Ivan Hrunyk, Viktor Pashchenko, Oleh Zabula, Oleh Holovan, Yurii Chernichenko, Oleksandr Kharkivskyi

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