Ultrasonic piezoelectric cleaning transducer is the use of ultrasonic cavitation in the liquid, acceleration and direct influx of liquid and dirt on the role of direct and indirect, so that the dirt layer is dispersed, emulsified, stripping and achieve the purpose of cleaning. Currently used in ultrasonic cleaning machine, the role of cavitation and straightforward flow of more applications.
Ultrasound is a sound wave whose frequency exceeds 20 kHz above the human hearing range. The propagation of ultrasonic waves depends on the elastic medium. When it propagates, the particles in the elastic medium oscillate and transmit energy through the medium according to the propagation direction of the ultrasonic waves. The waves can be divided into longitudinal waves and transverse waves. In solids, both can be transmitted, while in gas and liquid, only longitudinal waves can be transmitted. Ultrasound can cause particle vibration, particle acceleration, and ultrasonic vibration frequency.
The square of the rate is proportional to. Therefore, dozens of kilohertz of ultrasound will have a great force, strong ultrasonic propagation in the liquid, due to the non-linear effect, will produce acoustic cavitation. Shock waves generated when a cavitation bubble suddenly closes can generate thousands of atmospheric pressures around it, directly impacting the soil directly, destroying the adsorption of dirt and the surface of the cleaning member on the one hand, and causing the soil layer Of the destruction from the surface of the cleaning member and make them dispersed into the cleaning fluid. Bubble vibration can also scrub the solid surface. Bubbles can also "drill into" cracks in the vibration so that dirt off. For the grease dirt, due to ultrasonic cavitation, the two liquids are rapidly dispersed and emulsified at the interface. When the solid particles are coated with oil and adhere to the surface of the cleaning member, the oil is emulsified and the solid particles fall off. Cavitation bubbles in the vibration process will make the liquid itself to produce circulation, the so-called acoustic flow. He can make the surface of the vibrating bubble have the high-speed gradient and viscous stress, which can cause the destruction and shedding of dirt on the surface of the cleaning element. Ultrasonic cavitation High-speed micro-jet generated on the solid and liquid surface can remove or weaken the boundary layer, Corrosion of solid surface, increase the role of stirring to speed up the dissolution of soluble dirt, strengthen the cleaning effect of chemical cleaning agents. In addition, the ultrasonic vibration in the cleaning solution caused a lot of particle vibration speed and acceleration, but also to wash pieces of the surface of the dirt by the frequent and intense impact.