Thermal imaging to control overheat of hydraulic components of dump trucks

The article describes advantages of thermal imaging control over other methods. Thermal imaging allows remote, noncontact and fast diagnostics of equipment. As a result of primary instrumental examination using a thermal imager, visual inspection and review of technical documentation, the list of equipment units most susceptible to overheat and requiring regular thermal imaging control was compiled. Such units include the elements of dumping mechanism, steering, brake system and auxiliary hydraulic circuits. On the basis of the statistical analysis of faults of hydraulic components in BelAZ dump trucks in operation at the Muruntau open pit mine of the Navoi Mining and Metallurgical Works, it is shown that overheat is the most frequent cause of failure of an axial piston pump, pressure control unit, steering accumulator and a dosing pump. Thermal imaging maps of the above-listed units used thermal imager Testo 865. The emissivity coefficient was assumed as 0.95 in all measurements. For the axial piston pump, the maximal temperatures were attained in its center and reached 66.2–67.9 °C, which was reflective of the increased load of the zone. Approximately the same ranges were true for the maximal temperatures of dumping mechanisms, steering guides and hydraulic control valves. In this manner, thermal imaging is a promising method of nondestructive control and detection of overheat points in hydraulic components of mining and transport machines. 

Cherepetskaia E. B., Khudaiberdiev Sh. M., Kosimov Sh. S., Ergashev R. M. Thermal imaging to control overheat of hydraulic components of dump trucks. MIAB. Mining Inf. Anal. Bull. 2026;(2):59-67. [In Russ]. DOI: 10.25018/0236_1493_2026_2_0_59.

E.B. Cherepetskaia, Dr. Sci. (Eng.), Chief Researcher, NUST MISIS, 119049, Moscow, Russia, e-mail: eb.cherepetskaya@misis.ru, ORCID ID: 0000-0002-9642-2149,
Sh.M. Khudaiberdiev¹, Cand. Sci. (Eng.), Dean of the Mining and Metallurgical Faculty, e-mail: h.sherzod@list.ru, ORCID ID: 0000-0001-7248-492X,
Sh.S. Kosimov¹, Deputy Dean of the Mining and Metallurgical Faculty, e-mail: sh.kasimov.mk@gmail.com, ORCID ID: 0009-0005-0655-6020,
R.M. Ergashev, Transport Director, Navoi Mining and Metallurgical Company JSC, 210100, Navoi, Republic of Uzbekistan, 
¹ Almalyk Branch of NUST MISIS, 110105, Almalyk, Republic of Uzbekistan.

E.B. Cherepetskaia, e-mail: eb.cherepetskaya@misis.ru.

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