Hovorukha V.V., Makarov Yu.A., Kizilov V.K., Sobko T.P., Semidetnaia L.P. Study of side wear of the rail head in curved sections of the track with especially small radii of curvature

Details

Parent Category: Geo-Technical Mechanics, 2019

Category: Geo-Technical Mechanics, 2019, Issue 149

Geoteh. meh., 2019, 149, 111-121

https://doi.org/10.15407/geotm2019.149.111

 STUDY OF SIDE WEAR OF THE RAIL HEAD IN CURVED SECTIONS OF THE TRACK WITH ESPECIALLY SMALL RADII OF CURVATURE

¹Hovorukha V.V., ²Makarov Yu.A., ¹Kizilov V.K., ¹Sobko T.P., ¹Semidetnaia L.P.

¹Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Sciences of Ukraine, ²Branch "Center for Diagnostics of Railway Infrastructure of JSC "Ukrzaliznytsia"

UDC 625.14:625.143.482:622.6:539.3:539.4:62-192

Language: Russian

Annotation.

 In the article, the authors consider actual problem of the rail head side wear caused by various factors occurred in curved sections of the rail track with especially small radii of curvature (less than 650 m). The methodology of the study is aimed at the determination of wear intensity of the side part of rail heads. It is established that the intensity of rail heads side wear in curves with a radius of 200 – 400 m is 0.6 – 2.0 mm per 1.0 million tons (gross weight), and the service life of rails is reduced to 1.0 – 1.5 years. Decrease in train weight from 4600 tons to 4200 tons led to the decrease in side wear of the rail head for track sections with a radius of up to 300 m, 300 – 450 m and more than 450 m, respectively, by 17 %, 8.4 %, 2.2 % – on the "upward travel", and by 14 %, 20.7 %, 8 % – on the "downward travel". It was established that with the increase in the radius of curvature of the track from 268 m to 325 m, intensity of side wear is reduced by 1.15 times on average, and intensity of side wear of the rail head in sections of the rail track on the "downward travel" is on average by 1.6 times less than during the "upward travel". It is established that in the butt joints of curved sections with small radii of curvature, there is an accumulation of residual deformations due to movement in the vertical plane with the intensity of 1.158 mm/million tons (gross weight) of transported cargo, and in the horizontal plane with the intensity of 0.1 mm/million tons (gross weight) of transported cargo. It is further established that the use of rail lubrication units provides decrease in side wear of rail heads by 1.89 times on average. Before the installation of rail lubricators, intensity of side wear of the rail head was 0.189 – 0.207 mm/million tons (gross weight) of transported cargo, and after the installation of rail lubricators, the wear intensity has become 0.090 – 0.122 mm/million tons (gross weight) of transported cargo. Recommendations on reducing the intensity of side wear of rail heads in curves of small radii are given. Obtained results of the study are intended to be applied on the railway and mountain rail transport.

Keywords: i

ntermediate rail fastenings, loading, wear, destruction, resource of work.

References

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About the authors

Hovorukha Volodymyr Vasylovych,  Candidate of Technical Sciences (Ph.D), Senior Researcher, Head of Laboratory of Mine Railway Transport in Department of Geomechanics of Mineral Opencast Mining Technology, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Makarov Yurii Oleksandrovych, Master of Science, Doctoral Student, on-the-job, laboratory of Mine Railway Transport in Department of Geomechanics of Mineral Opencast Mining Technology, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), head of the Pioneering Station No. 1 of the branch "Center for Diagnostics of Railway Infrastructure of JSC "Ukrzaliznytsia" (PS-1 CDRI), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Kyzylov Valentyn Kostyantynovych, master of Science, Chief Technologist of the Laboratory of Mine Railway Transport in the Department of Mining Transport Physics and Mechanics, Institute of Geotechnical Mechanics named by N. Poliakov of National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Sobko Tamara Petrivna, master of Science, Chief Designer of the Laboratory of Mine Railway Transport in the Department of Mining Transport Physics and Mechanics, Institute of Geotechnical Mechanics named by N. Poliakov of National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Semidetna Liudmyla Pavlivna, master of Science, Leading Engineer of the Laboratory of Mine Railway Transport in the Department of Mining Transport Physics and Mechanics, Institute of Geotechnical Mechanics named by N. Poliakov of National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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