Intensification of submersion cleaning of parts using ultrasonic oscillations

   The intensification of the submersion cleaning process of parts depends on the physicochemical activity of the cleaning fluid and the mechanical force of the fluid’s impact on the surface being cleaned. A promising method for intensifying submersion cleaning is to produce ultrasonic oscillations in the flow of cleaning fluid. The authors conducted research to justify the feasibility of using ultrasound to intensify the submersion cleaning process of parts and to determine the optimal values of the technological parameters of the intensified process. The cleaning process was carried out in a submersion washing machine, which is a tank with a basket rotating in the cleaning solution, equipped with two submersion-type ultrasound sources attached to its walls. Mesh filtering elements of hydraulic systems, having oil-and-dirt contamination on their working surface, were used as the cleaning object. An aqueous solution of the technical detergent Labomid-203 was used to clean the filtering elements. Experimental studies were carried out at the following parameters: cleaning solution temperature of 40, 50, 60 and 70 °C; detergent concentration in the solution of 5, 10, 15 and 20 g/l; cleaning duration of 2, 4, 6, 8, 10, 12 and 14 min; ultrasonic oscillation frequency of 15, 20, 25, 30 and 35 kHz, and ultrasonic oscillation intensity of 1, 2, 3 and 4 W/cm². To assess the cleaning quality of the filtering elements from contamination, use was made of a weighing method. The optimal values of the technological parameters of the intensified cleaning of filtering elements were experimentally determined: oscillation frequency – 30 kHz, oscillation intensity – 3 W/cm², detergent concentration in the solution – 14 to 17 g/l, cleaning solution temperature – 50 to 55 °C, cleaning duration –10 min. The study confirmed the feasibility of using ultrasound to activate the cleaning fluid when intensifying submersion cleaning.

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