Iron ore dust influence on the wear surface of quarry excavator hydraulic cylinder rods

This article shows the negative nature of the impact of abrasive fine iron-ore dust with high concentration in the dusty working area on the intensity of the wear of the rod and seals of the hydraulic cylinder of a mining excavator when loading iron ore. The possibility of application of non-contact optical method of measuring the surface topography of the rod during its wear in the abrasive dust-air environment verified, which could be the basis for scientific discussions with the aim of developing new technologies of diagnosing the condition of the parts surface. The advantages of the system of optical non-contact method of measuring surface topography using fractal dimensionality as a roughness measure shown. The software construction of the reference roughness profile curve (Abbott-Firestone) and calculation of quantitative roughness parameters on its basis makes this method of diagnostics promising for routine maintenance of hydraulic cylinder rods. The growth of surface roughness coefficient as a ratio of the areas of contact surfaces to the areas of non-contact surfaces on the wear length of the rod indicates a decrease in the roughness of the rod surfaces. It is noted that at the number of cycles of 320 thousand. There is a minimum value of the fractal dimension of the rod surface D = 2.666 and a minimum value of the rod surface height Sq with a gradual decrease in the surface roughness of the rod. The value of the number of cycles (z = 320 thousand) can be used when adjusting the maintenance and repair schedule of excavator hydraulic cylinders as a 90% service life to failure.

Abdelwahab Agaguena, Mikhailov A. V. Iron ore dust influence on the wear surface of quarry excavator hydraulic cylinder rods. MIAB. Mining Inf. Anal. Bull. 2023;(11-1): 5-23. [In Russ]. DOI: 10.25018/0236_1493_2023_111_0_5.

Abdelwahab Agaguena¹, Graduate Student, e-mail: Agagena_A@pers.spmi.ru, ORCID ID: 0000-0001-8425-3803,
A.V. Mikhailov¹, Dr. Sci. (Eng.), Professor, e-mail: Mikhayov_AV@pers.spmi.ru, ORCID ID: 0000-0002-0516-7737,
¹ Empress Catherine II Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.

Agaguena Abdelwahab, e-mail: Agagena_A@pers.spmi.ru.

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