Factors And Ultrasonic Cleaning Cavitation Field Research

Ultrasonic cleaning has been increasingly applied in many areas, such as industry, electrical technology, medical supply, military, textile industry and so on, which have a widely usage of the advanced technology. The scientific workers present this technology by making the ultrasonic cleaner. The marketing machines used in industries and small areas have a big difference in appearance but the same theory, cleaning objects with ultrasonic cavitation effect. Compared with the traditional cleaning methods, ultrasonic cleaning technology has many obvious advantages. For example, it has a good effect on cleaning and is easy to achieve automated management, decreases the labor and has no pollution to the environment, especially achieves a good effect on cleaning those accurate equipments and irregular shaped objects.The ultrasonic cleaner has been used for several decades except for some unsatisfaction. The intensity of the ultrasonic cavitation effect has a direct influence on cleaning results. People presume high cleaning qualities as well as intense cavitation effect. There are many factors on cavitation effect, and the most important factor is the distribution homogeneity of the cleaning liquid fields. The standing wave field formed by single frequency sound field make the sound intensity have the uneven distribution in liquid level. Where there is a high cavitation intensity, there is a good natural cleaning effect, or a weak intensity which is easy to form cleaning blind areas and unable to have a good effect otherwise. The transducer of the ultrasonic cleaner-Sandwich piezoelectric transducer has a good practical performance and a reasonable price and simple production process. Which is the core component of cleaner.To improve this situation, this paper attempts to change the link in ultrasonic cleaning machine transducer and the cleaning trough bottom, which can improve the distribution of sound field. This paper mainly involves the following aspects.1. A brief statement of the ultrasonic wave and the field’s concept and characters, ultrasonic wave cleaning technology’s development, application, theoric usage and the latest development.2. A research on ultrasonic cavitation mechanism. Discussion on cavitation conditions, the single, double bubble movement and the corresponding parameters, energy conversion of the field, influential factors of ultrasonic cavitation intensity. The latest research progress of ultrasonic cavitation.3. An introduction of the construction of the ultrasonic cleaner,the theory usage of the technology, the advantage of the cleaner, matters needing attention when using the cleaner, the latest progress of ultrasonic cleaner.4. Design a novel vibration system composed by longitudinal transducer and rectangular plate, the rectangular plate of the vibration system transform the longitudinal vibration exited by longitudinal transducer into bending vibration, so as to convey sound energy to the cleaning groove and radiate the sound wave. This paper analyzes the resonance frequency, and the electro-mechanical equivalent circuit of the coupling vibration. In the meanwhile, the traditional longitudinal transducer and a new composite vibration system are used as the radiation source to derive cleaning field distribution differences, concluding that the new composite vibration system can effectively improve the standing wave sound field.