National Polytechnic University of Armenia, Yerevan, Republic of Armenia:

S. S. Chibukhchyan, Head of Department, Candidate of Engineering Sciences, armenpack@mail.ru
G. S. Chibukhchyan, Assistant, Candidate of Engineering Sciences

Autofam AC LLC, Yerevan, Republic of Armenia:

O. L. Arutyunyan, Head of Laboratory, Candidate of Engineering Sciences

The mining industry of the Republic of Armenia makes an important contribution to the country’s economy, developing rapidly and providing up to 33 % of the share of the raw materials sector. In order to enhance performance and productivity of mining companies in the Republic of Armenia, it is necessary to increase operating efficiency of process equipment and, first of all, of heavy-duty dump trucks, in particular, the BELAZ family. It should be noted that the considerable maintenance and repair burden raises specific demands for the reliability and operability of systems, components and aggregates of dump trucks, in particular, internal combustion engines. The studies have found that the downtime of BELAZ dump trucks because of engine malfunctions accounts for 29 % of the total balance of downtime, which directly leads to the increased operating costs and reduced productivity. The power units of dump trucks have no backup, and, as a result, failure of a unit or a few units will lead to failure of the car as a whole. Power units have closed lubrication systems, failures of which account for a significant share in the total balance of failures of motor vehicles—from 38 to 48 %. In this regard, it is advisable to have information about technical condition of the machine from such source as the lubricating oil. Based on such information from the spectral analysis of the worked oil, it is possible to identify the most unreliable element of the system and perform the entire range of maintenance and repair that allows effective control over technical condition of the car. In order to determine the worked oil characteristics, engine oil of 11 BELAZ dump truck, having different operational life lengths, were subjected to the spectral analysis. The research proved high performance characteristics of engine oil G-Profit MSI Plus SAE 15W-40 API Ci-4/SL and confirmed its application advisability in operation of dump trucks in open pit mines in Armenia.

1. Mgdesyan A. Armenian mining industry to come out of shadow : Call the owners. 2019. Available at: https://yandex.ru/turbo/eadaily.com/s/ru/news/2019/01/31/gornorudnuyu-otrasl-armeniivyvodyat-iz-teni-oglasite-vseh-sobstvennikov (accessed: 02.04.2022).
2. Integrated development trends in Armenia in 2019. Integrated Research Center, 2020. Available at: https://eabr.org/upload/iblock/bc9/EABR_RA_06_2020_RU.pdf (accessed: 02.04.2022).
3. Armenia exported more mining products and imported more machines and equipment. 2021. Available at: https://armenpress.am/rus/news/1042917.html (accessed: 03.06.2022).
4. Vlasov Yu. A. Diagnosis methodology for machine assemblies by electrophysical control over operating oil parameters : Theses of Dissertation … of Doctor of Engineering Sciences. Tomsk, 2015. 40 p.
5. Weinreb K. Diagnostics of an induction-motor rotor by the spectral analysis of stator currents. Thermal Engineering. 2013. Vol. 60, Iss. 14. pp. 1006–1023.
6. Nakamura Y., Hashimoto K., Nakamura H., Ejiri S. Characteristics of Diesel Engine Oil for Heavy Duty Commercial Vehicles Achieving for both Fuel Economy and Reliability : SAE Technical Paper 2019-01-2243. 2019. Available at: https://saemobilus.sae.org/content/2019-01-2243/#citations (accessed: 15.04.2022).
7. Wolak A., Zając G. Changes in the operating characteristics of engine oils: A comparison of the results obtained with the use of two automatic devices. Measurement. 2018. Vol. 113. pp. 53–61.
8. Hawley J. G., Bannister C. D., Brace C. J., Akehurst S., Pegg I. et al. The effect of engine and transmission oil viscometrics on vehicle fuel consumption. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 2010. Vol. 224, Iss. 9. pp. 1213–1228.
9. Bastuck T., Böhnke F., Hoppe S., Mittler R. Systemische Kolbenringauslegung zur Reduzierung von Partikelrohemissionen. MTZ (Motortechnische Zeitschrift). 2020. Vol. 81, Iss. 10. pp. 50–55.
10. Lensch-Franzen C., Gohl M., Scholl P., Paoloni F. Einfluss der Flüchtigkeit von Schmierölen auf die Öl- und Partikelemissionen. MTZ (Motortechnische Zeitschrift). 2019. Vol. 80, Iss. 9. pp. 46–55.
11. Gunkel M., Frensch M., Robota A., Gelhausen R. Innermotorische Emissionsreduzierung Zusammenhang zwischen Partikelemissionen und Ölverbrauch. MTZ (Motortechnische Zeitschrift). 2018. Vol. 79, Iss. 7-8. pp. 46–51.
12. Shailesh Kumar Singh, Somnath Chattopadhyaya, Alokesh Pramanik, Sanjeev Kumar, Animesh K. Basak et al. Tribological Properties of Chromium Nitride on the Cylinder Liner under the Influence of High Temperature. Materials. 2020. Vol. 13, Iss. 20. 4497. DOI: 10.3390/ma13204497
13. Naglyuk I. S. Estimation of quality of motor oils during exploitation heavy tippers. Vestnik Donetskoy akademii avtomobilnogo transporta. 2014. No. 4. pp. 53–58.
14. Medzhidov M. A. Improvement of maintenance and repair techniques for dump trucks : Dissertation … of Candidate of Engineering Sciences. Moscow, 2009. 136 p.
15. Efimov V. I., Rybak L. V. Production and environment. Moscow : Izdatelstvo MGGU, 2012. 301 p.
16. Gridin V. G., Efimov V. I. Air quality monitoring in the Kemerovo Region. GIAB. 2008. No. 1. pp. 231–236.
17. Burtsev S. V., Dukhov P. A. Monitoring and optimization of using greasing substance in compliance with conditions of working open pit equipments. Izvestiya Tulskogo gosudarstvennogo universiteta. Nauki o Zemle. 2017. No. 2. pp. 76–88.
18. Korolev A. E. Analysis of motor oils properties. Vestnik gosudarstvennogo agrarnogo universiteta Severnogo Zauralya. 2016. No. 2(33). pp. 115–121.
19. Dunaev A. V. Oils as diagnosing means for machinery and equipment. Traktory i selkhozmashiny. 2015. No. 6. pp. 33–37.
20. Korolev A. E. Analysis of operational properties of the motor oils. Innovation approaches in science and education : Theory, methodology, practice. Penza : MTsNS “Nauka i Prosveshchenie”, 2017. pp. 248–256.