The article proposes an express-methodology for assessing the condition of hydraulic oil, based on the study of its thermophysical properties. During the experiment on the installation of the KI-4200, the influence of mechanical impurities on the thermal modes of operation of the hydraulic drive, functioning on oil MG-15-V, was investigated. Correlations have been established between the content of pollutants, the heating temperature and the thermal conductivity of the oil. A comprehensive condition indicator is proposed that combines data on temperature, thermal conductivity, and the degree of thermo-oxidative degradation. The results can be used to create on-board diagnostic systems for hydraulic drives.
hydraulic drive, hydraulic oil, mechanical impurities, wear, thermal diagnostics, temperature
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