Assessment of the efficiency of the cleaning methods of aviation ball bearings according to their vibroacoustic characteristics

Abstract

The article presents a detailed analysis of the influence of micropollution of rolling bearing surfaces on vibroacoustic indicators. Miniature rolling bearings were studied as the most difficult to clean the tribosystem. In the course of research, the main types of defects that occur during the operation of bearings, which are caused by micropollution of various kinds, were identified and highlighted. The attention was focused in detail and it was proved that the shape, nature and size of impurities affect the vibration speed and vibration acceleration. Carrying out theoretical research, development and testing of laboratory equipment contributed to the development of a method for cleaning the working surfaces of the investigated ball bearings. As a practical result of the work, the laboratory complex for evaluating the efficiency of cleaning bearings by vibroacoustic parameters was modernized and a generalized method of cleaning miniature ball bearings was developed. The methods of cleaning aircraft ball bearings with the use of pulsed magnetic-turbulent and ultrasonic approaches were further developed as a comprehensive high-performance method of cleaning various types of bearings from metallic and non-metallic contamination. The nature of pollution was investigated in detail. Regularities between the sizes of contamination and the acoustic parameters of ball bearings have been established. The proposed system for monitoring ball bearings by vibroacoustic indicators is planned to be implemented in the future at enterprises that manufacture bearings and repair enterprises as an input control and an express method of assessing their performance.

Key words: contamination, monitoring, vibration diagnostics, miniature ball bearings, cleaning, microstructure, vibroacoustic characteristics.