Ultrasonic cleaning ultrasonic in the liquid cavitation, acceleration and straight into the flow of liquid and dirt, direct and indirect role, make the dirt layer is dispersed and emulsified, stripping and achieve the purpose of cleaning. At present, the use of ultrasonic cleaning machine, the role of cavitation and direct flow into more applications.
(1) the cavitation effect: the cavitation effect is the supersonic wave by the compression force of twenty thousand times per second and the high frequency conversion method which reduces the pressure to carry on the transmission to the liquid. In the reduced pressure, the liquid produced vacuum nucleus bubble phenomenon, when the compression force, vacuum nucleus bubble pressure crushed produced strong impact force, stripped therefrom by cleaning the dirt on the surface, so as to achieve the purpose of precision cleaning.
In the process of ultrasonic cleaning, the naked eye can see the bubble is not a vacuum bubble, but air bubbles, it can reduce the effect of cavitation on the cleaning efficiency. Only the air bubbles in the liquid are completely removed, and the vacuum nuclear group of cavitation can achieve the best effect.
(2) straight into the flow of the effect: ultrasonic wave in the liquid along the direction of the sound generated by the flow of the phenomenon known as the straight flow. Acoustic intensity in 0.5W/cm2, the naked eye can see straight into the flow, perpendicular to the vibration surface flow, the flow rate of about 10cm/s. The straight into the stream by cleaning the surface of the micro oil dirt is stirring, the dirt on the surface of the cleaning liquid also produce convection, dissolving dirt dissolved in the liquid and liquid mixture, dissolution rate accelerated, on a dirt removal plays a great role.
(3) acceleration: the acceleration produced by a liquid particle. For the high frequency ultrasonic cleaning machine, cavitation is not significant, then the cleaning mainly by liquid particles under the effect of the acceleration of the impact of particles on the dirt for ultra precision cleaning.