Оценка надежности трибосистем на неустановившихся режимах работы

Abstract

The issue of determining the wear rate in unsteady operating modes (during running-in period) and in stationary modes (after running-in is completed) during bench tests of vessel technical equipment is considered. The availability of such information will reduce the time for finishing prototypes. Moreover, it will help to identify ways to improve the reliability of technical equipment during operation. There have been carried out the experimental studies that showed the reliability of the kinetics of the surface destruction processes at the stage of tribosystems running-in. Experimental studies were carried out in two stages and determined the correlation between the rate of volumetric wear and acoustic emission parameters: the variance of signal amplitudes and the spectral power of radiation. The presented graphic dependences demonstrate that the spectral power has the optimal functional relationship with the friction parameters: friction torque and temperature. The analysis of the dependences obtained showed that the variance of the amplitudes and the spectral power of the acoustic emission signals reflects sufficiently complete the wear process. Thus, it is in a functional relationship with the rate of volumetric wear. It has been experimentally confirmed on various tribosystems that the spectral power of acoustic emission signals has a better correlation coefficient with the wear rate than variance. Therefore, it can serve as a parameter for estimating the wear rate in unsteady operating modes. A technique for evaluating the tribosystems wear rate during running-in is proposed. The technique is based on the recording of acoustic radiation from the friction zone. The spectral power of acoustic radiation correlates with the wear rate with a correlation coefficient R = 0.82.