The analysis of the problem of pollution removal from hard-to-reach areas (cavities, closed openings and channels) on complicated-shaped parts of products of power mechanical and aggregate engineering is performed. The chemical composition of pollution on the example of the burner devices is studied. It is determined, that the large amount of deposits on weight consists of oxides of iron and the alloying metals. It is shown, that the most effective method of performance restoration of channels and openings is ultrasonic cleaning. However, this method has restrictions on impact on the hidden (shadow) zones owing to attenuation in cavitation processes. The cleaning method, according to which the combined impact is applied to the cleaned surfaces of the general cavitation and local contact vibration effect of the ultrasonic radiator, leading to high-frequency deformations and tension in deposits of organic and inorganic pollution and to their intensive peeling, is suggested. The technological modes of ultrasonic cleaning are defined experimentally. It is determined, that application of the suggested method allows significantly reduce the time of cleaning of channels and openings with removal to 97-98% of pollution at the brought ultrasonic power in 1 kW in comparison with the existing schemes of the general cavitation cleaning.
burner devices. ultrasonic device, cleaning.
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