EXPERIMENTAL INVESTIGATION OF THE PROPERTIES OF GEOMODIFIERS IN FRICTION PAIRS
Journal Title: Проблеми тертя та зношування - Year 2018, Vol 79, Issue
Abstract
The paper presents the results of research on friction surfaces microprocessing using geomodi-fiers (GMF). Studies have been done on the content of GMF in oil in percent, which provides the required anti-friction properties. The research was carried out on a precision tribometer and a of friction pair "shaft - tape". In experiments, grinded and roughened to Rа = 0,08 ... 0,1 mi-crons the specimens made of steel 45 (hardness НRC 30 ... 32) with a diameter of 30 mm were applied. As a counter-sample, a steel tape made of steel U8 with a roughness Ra of 0.1 mi-crons was used with a width of 32 mm, a thickness of 0,06 mm. The temperature in the fric-tion process was controlled with the help of a chromel-collier thermocouple. The working junc-tion of the thermocouple was applied to the counter-sample tape. The friction mode corre-sponded to the boundary friction, which was described in previous studies. The experiments with compositions of 5%, 10%, 15%, 20% content of GMF-U-1/3 and GMF-U-1/30 in oil were carried out. The coefficients of friction after microprocessing for I-20A grease without geo-modifiers and with the addition of geomodifiers are determined. Experiments with geomodifi-ers GMF-U-1/3 and turbine oil were carried out to detect the influence of oil grades. Friction coefficient studies during heating were carried out with with compositions of 10% content of GMF-U-1/3 in oil I-20. The dependences of the coefficient of friction on the percentage of geomodifiers in oils I-20A and Tp-22 are given. As a result of the antifriction properties of ge-omodifiers studies, their optimal percentage content in oil was detected. Thus, data was ob-tained to justify the choice of the required percentage content of geomodifiers in the I-20 oil when used in friction pairs under extreme friction conditions.
Authors and Affiliations
A. O. ISHCHENKO, A. V. RADIONENKO
Keywords
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