ANALYSIS OF DEFECTS IN THE CRANKCASE OF THE REAR AXLE OF THE BELAZ 7530 DUMP TRUCK

Original paper

UDC 622.684 c D.M. Dubinkin, D.I. Zakrasovsky, 2025

ISSN 0041-5790 (Print) • ISSN 2412-8333 (Online) • Ugol’ – Russian Coal Journal, 2025, №12

DOI: http://dx.doi.org/10.18796/0041-5790-2025-12-58-62

Authors

D.M. Dubinkin, D.I. Zakrasovsky

T.F. Gorbachev Kuzbass State Technical University, Kemerovo, 650000, Russian Federation, e-mail: ddm.tm@kuzstu.ru

Authors Information

Dubinkin D.M. – PhD (Engineering), Associate Professor, T.F. Gorbachev Kuzbass State Technical University, Kemerovo, 650000, Russian Federation, e-mail: ddm.tm@kuzstu.ru

Zakrasovsky D.I. – Junior Researcher at the Scientific Center “Digital Technologies”, Postgraduate Student, T.F. Gorbachev Kuzbass State Technical University, Kemerovo, 650000, Russian Federation, e-mail: zakrasovskydi@kuzstu.ru

Abstract

The article presents the results of the analysis of defects in the BelAZ 7530 rear axle crankcase. The operation of mining dump trucks in difficult mining conditions requires the use of more precise design approaches. One of the design stages is to study the specifics of the operation of existing similar machines. The rear axle crankcase is the power element of the rear axle. According to failure statistics, the cost of repairing the crankcase can be 35% or more of the total repair time, and the frequency of crack-like defects in the crankcase can be 30%, so the design poses a great risk of resource loss during operation. At the moment, the authors are developing newly designed equipment, so it is necessary to pay special attention to the design of the crankcase, and one of the stages is the analysis of the operating conditions and defects of similar machines, the closest in this case is the BelAZ 7530. According to the results of the inspection, survey and other studies, crack-like defects in welded joints are most characteristic of the crankcase, and deflections are much less common. The destruction of welded joints occurs in places through which loads are transmitted to the frame crossbar, namely: between the drum and the flanges; between the drum and the products on which the suspension elements of the rear axle are installed. At the same time, defects in welded joints in the structure usually occur after several years of operation of the machine, subject to operating conditions, and their rate of development is influenced by both technological and technical reasons. During the subsequent development of the crankcase, a calculation of the fatigue life of the structure is necessary to verify reliability. In addition to calculating the fatigue life, it is necessary to conduct a modal analysis to prevent the resonance of the structure.

Keywords

Dump truck, bridge, bridge crankcase, defects, operating conditions.

References

1. Пашков Д.А., Закрасовский Д.И., Дубинкин С.Д. Технические решения автономных карьерных самосвалов // Техника и технология горного дела. 2023. № 3(23). С. 51-70. DOI: 10.26730/2618-7434-2023-3-51-70. Pashkov D.A., Zakrasovsky D.I., Dubinkin S.D. Technical solutions for autonomous mining dump trucks. Mining engineering and technology. 2023;3(23):51-70. (In Russ.).
2. Обоснование эффективности эксплуатации большегрузных автосамосвалов на разрезах по критерию долговечности заднего моста / И.А. Паначев, Г.В. Широколобов, И.В. Кузнецов и др. // Вестник Кузбасского государственного технического университета. 2016. № 6(118). С. 106-114. Panachev I.A., Shirokolobov G.V., Kuznetsov I.V., Shirokolobova A.G. Justification of the efficiency of operation of heavy-duty dump trucks on sections according to the criterion of durability of the rear axle. Bulletin of the Kuzbass State Technical University. 2016;6(118):106-114. (In Russ.).
3. Статистика отказов высоконагруженных узлов карьерных самосвалов грузоподъемностью 220 тонн / А.И. Бокарев, В.А. Дианов, А.Б. Карташов и др. // Вестник Кузбасского государственного технического университета. 2024. № 4(164). С. 23-31. DOI: 10.26730/1999-4125-2024-4-23-31. Bokarev A.I., Dianov V.A., Kartashov A.B., Harutyunyan G.A., Dubinkin D.M., Pashkov D.A. Statistics of failures of highly loaded components of dump trucks with a lifting capacity of 220 tons. Bulletin of the Kuzbass State Technical University. 2024;4(164):23-31. (In Russ.).
4. Паначев И.А., Кузнецов И.В. К методике сохранения ресурса металлоконструкций заднего моста подвески большегрузных автосамосвалов // Физико-технические проблемы разработки полезных ископаемых. 2015. № 2. С. 82-90. Panachev I.A., Kuznetsov I.V. On the methodology for preserving the resource of metal structures of the rear suspension axle of heavy-duty dump trucks. Physico-technical problems of mining. 2015;(2):82-90. (In Russ.).
5. Паначев И.А., Кузнецов И.В. О трещинообразовании в металлоконструкциях большегрузных автосамосвалов при эксплуатации на разрезах Кузбасса // Вестник Инженерной школы Дальневосточного федерального университета. 2018. № 3(36). С. 14-21. Panachev I.A., Kuznetsov I.V. On cracking in metal structures of heavy-duty dump trucks during operation in the Kuzbass mines. Bulletin of the Engineering School of the Far Eastern Federal University. 2018;3(36):14-21. (In Russ.).
6. Кузнецов И.В. Оценка ресурса металлоконструкций задних мостов автосамосвалов при эксплуатации на разрезах Кузбасса: специальность 05.05.06 «Горные машины»: дис. … канд. техн. наук / Кузнецов Илья Витальевич, 2015. 138 с.
7. Паначев И.А., Кузнецов И.В. Анализ ресурса несущих элементов задних мостов карьерных самосвалов в процессе их эксплуатации при различных значениях руководящего уклона трассы // Вестник Инженерной школы Дальневосточного федерального университета. 2019. № 3(40). С. 13-20. Panachev I.A., Kuznetsov I.V. Resource analysis of the bearing elements of the rear axles of mining dump trucks during their operation at various values of the steering slope of the highway. Bulletin of the Engineering School of the Far Eastern Federal University. 2019;3(40):13-20. (In Russ.).
8. Разработка методики определения основных геометрических параметров гидравлической системы рулевого управления карьерного самосвала / А.И. Бокарев, В.А. Дианов, А.Б. Карташов и др. // Вестник Кузбасского государственного технического университета. 2024. № 3(163). С. 49-64. DOI: 10.26730/1999-4125-2024-3-49-64. Bokarev A.I., Dianov V.A., Kartashov A.B., Harutyunyan G.A., Pashkov D.A., Dubinkin S.D. Development of a methodology for determining the basic geometric parameters of the hydraulic steering system of a mining dump truck. Bulletin of the Kuzbass State Technical University. 2024;3(163):49-64. (In Russ.).
9. Паначев И.А., Кузнецов И.В. Взаимосвязь напряжений в металлоконструкциях заднего моста большегрузных автосамосвалов и удельных затрат энергии при транспортировании горной массы // Вестник Кузбасского государственного технического университета. 2014. № 1(101). С. 45-49. Panachev I.A., Kuznetsov I.V. The relationship of stresses in the metal structures of the rear axle of heavy-duty dump trucks and specific energy costs during transportation of rock mass. Bulletin of the Kuzbass State Technical University. 2014;1(101):45-49. (In Russ.).
10. Mi Ch., Li Y., Zhang Ch. et al. An Energy-Based Anti-Fatigue Optimization Design Method of Welded Rear Axle Housing in a Mining Dump Truck. Mechanika. 2023;29(4):317-323.
11. Автотракторные колеса: Справочник. М.: Машиностроение, 1985. 272 с.
12. Zheng B., Fu Sh., Lei J. Topology Optimization and Multiobjective Optimization for Drive Axle Housing of a Rear Axle Drive Truck. Materials. 2022;15(15):5268. DOI: 10.3390/ma15155268.

Acknowledgements

The work was carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation under the agreement dated 30.09.2022 № 075-15-2022-1198 with the Kuzbass State Technical University named after T.F. Gorbachev’s “Comprehensive scientific and technical program for a full innovation cycle ‘Development and implementation of a set of technologies in the fields of exploration and extraction of solid minerals, industrial safety, bioremediation, creation of new products of deep process processing from coal raw materials while consistently reducing the environmental impact and risks to the life of the population’ (KNTP ‘Clean coal – Green Kuzbass’)” approved by the decree of the Government of the Russian Federation dated May 11, 2022 No. 1144-r within the framework of the event “Development and creation of an unmanned shuttle-type mining dump truck with a lifting capacity of 220 tons” in terms of carrying out research and development work.

For citation

Dubinkin D.M., Zakrasovsky D.I. Analysis of defects in the crankcase of the rear axle of the BELAZ 7530 dump truck. Ugol’. 2025;(12):58-62. (In Russ.). DOI: 10.18796/0041-5790-2025-12-58-62.

Paper Info

Received October 3, 2025

Reviewed November 15, 2025

Accepted November 28, 2025