Study On The Scream During The Process Of The High-power Low-frequency Ultrasonic Cleaning

Ultrasonic cleaning is one of the most extensive applications of power ultrasonic,and it has many advantages, such as fast cleaning rate, good cleaning quality, low costand being apt to realize automatization, etc. As the best way in the cleaning dirt on theobjects, Ultrasonic cleaning is high efficiency and good effective. Because of the lotof advantages, such as few of the damnifications to the surface of objects, few ofpollution to the environment, etc., Ultrasonic cleaning can't be replaced by another inmany of manufactories.While Ultrasonic cleaning is extensively applied, a key problem was found, thatis, there is high-dB noise during the cleaning-process. During the process of theHigh-power Low-frequency Ultrasonic cleaning, the noise touches 75 ～ 85dB.Sometimes the noise can become the scream (95～105dB). As you know, if a workerstayed in the high-dB environment, his ears would be seriously damaged. In theindustry, it's important to protect the workers. So it's on the point of weakening oreliminating the scream.On the basic of analyzing the character of radiating ultrasonic field of single andcombinatorial round plunger theoretically and experimentally with the AnalyticalHierarchy Process (AHP), many of causations are studied, which maybe result in thescream during the process of the High-power Low-frequency Ultrasonic cleaning.According these causations, a series of experiments are planed and carried. Afteranalyzing the data from these experiments, we get some conclusion in order to solvethis problem for the next step.In detail, following work has been done in this paper and several results areconcluded:1. Analyzing the character of radiating ultrasonic field of single round plunger,deriving the pressure distribution of combinatorial round plunger and it indicatesthat the magnitude of pressure varies inversely as γ and relates to θ and ?.And thesame time the directivity of wave steering is also discussed.2. On the base of analyzing of these causations resulting in the scream during theprocess of the High-power Low-frequency Ultrasonic cleaning with AHP, we findthe influencing proportions among them.3. The distribution and intensity of ultrasonic fields and cavitation fields areanalyzed and measured by dyeing and hydrophone method before and after thescream takes place during the process of the cleaning. The results are comparedand analyzed too.