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4_2023_sen_4

Title of the article RESEARCH OF DESTRUCTION CAUSES OF LARGE-SIZED BEARINGS OF MINING DUMP TRUCKS
Authors

KUDELKO Igor U., Researcher of the Laboratory of Reliability Problems and Metal Intensity of High and Extra-High Capacity Dump Trucks of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SIDORENKO Aleksandr G., Ph. D. in Eng., Head of the Laboratory of Reliability Problems and Metal Intensity of High and Extra-High Capacity Dump Trucks of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SOTNIKOV Maksim V., Researcher of the Laboratory of Reliability Problems and Metal Intensity of High and Extra-High Capacity Dump Trucks of the R&D Center “Mining Machinery”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Year 2023
Issue 4(65)
Pages 31–37
Type of article RAR
Index UDK 621.822; 669.018.24
DOI https://doi.org/10.46864/1995-0470-2023-4-65-31-37
Abstract The paper considers the main types and causes of surface damage that lead to the destruction and failure of large-sized bearings of motor-wheel reducers (MWR) of BELAZ mining dump trucks. The disadvantages of 20Х2Н4A (20Kh2N4A) steel currently used for the manufacture of large-sized MWR bearings are given. It is shown that using this steel it is problematic to achieve a high and uniform distribution of microhardness values over the thickness of the hardened layer. The analysis of the destruction of this type of bearings made of 20Kh2N4A steel largely determining the required life of the motor-wheel reducers, is carried out. The obtained research results indicate the need to use new grades of steels for the manufacture of largesized MWR bearings.
Keywords large-sized, bearings, motor-wheel reducers, fracture, microhardness, 20Х2Н4А (20Kh2N4A) steel, warpage
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