The article is devoted to improving the method of testing the wear resistance of friction pairs in a wide range of hardness by embedding a roller into a flat surface of the material under study (sample), first proposed by M. V. Lomonosov. The formula for estimating the volumetric wear resistance from linear depending on the specific pressure is proved. According to the new method, the relative wear resistance of materials in a wide hardness range was evaluated.

For the development of standards of timing and amount of shipboard equipment maintenance and repair it is important to study and improve the theory and practice of evaluation of endurance of such friction pairs as sliding bearings. In the diagnosis of rolling bearings vibroacoustic methods are widely used, but, as for sliding bearings, these methods are still at the stage of research with respect to friction. Thereby, the results of testing different types of tribounit samples on friction test machines have been studied. There have been done vibration measurements for given conditions (rotation speed and load), where the root mean square values (RMS) of vibrational acceleration a in m/s2 or dB for acceleration were used as main diagnostic parameters. The authors have investigated dependencies of vibration levels for each band of tri-band spectrum on rotational speed, load, lubrication, surface roughness with respect to temperature, coefficient of friction and wear resistance. It has been proved that the source of VHF vibration of RMS is friction in coupling, depending on the surface condition and lubrication type of the friction pair. Dependency of acceleration RMS level on rotational speed and load of the sample has been stated. The results allow to infer about the effectiveness of the proposed tri-band vibroacoustic characteristics of the tribounits using vibrometer CM-21. This method can be used for diagnostics of sliding bearings, which can require standardization of modes and conditions of measurement and the establishment of zones of maximum permitted levels of the object state.

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The article is devoted to improving the method of testing the wear resistance of “block-on-ring” friction pairs. Simplified formulas for estimating linear and volumetric wear resistance based on decomposition into a Taylor series of geometric functions are proved. Particular attention is paid to the justification of linear wear based on the equivalence of the results in the calculation of volume wear. The dependence of volumetric wear resistance on linear resistance through specific pressure is proved. As a test of the proposed procedure, field tests of a number of materials of different hardness were carried out to determine the relative wear resistance of both linear and volumetric, as a result of which the effectiveness and advantages of the proposed method were justified.