What is the principle of ultrasonic cleaning machine?

The principle of ultrasonic cleaning machine is mainly to convert the acoustic energy of power ultrasonic frequency source into mechanical vibration through the transducer, and radiate ultrasonic waves to the cleaning liquid in the tank through cleaning the tank wall. Due to the radiation of ultrasonic waves, the microbubbles in the liquid in the tank can keep vibrating under the action of sound waves. Destroy the adsorption of dirt and the surface of cleaning parts, cause the dirt layer to fall off due to fatigue damage, and the vibration of bubbles scrubs the solid surface. It has good directionality, strong penetrating ability, easy to obtain concentrated acoustic energy and long propagation distance in water, and can be used for ranging, speed measurement, cleaning, welding, lithotripsy and sterilization. It has many applications in medicine, military, industry and agriculture. Ultrasound is named because its lower frequency limit is about equal to the upper hearing limit of human beings. The principle of ultrasonic cleaning machine is mainly to convert the acoustic energy of power ultrasonic frequency source into mechanical vibration through the transducer, and radiate ultrasonic waves to the cleaning liquid in the tank through cleaning the tank wall. Due to the radiation of ultrasonic waves, the microbubbles in the liquid in the tank can keep vibrating under the action of sound waves.

When the sound pressure or intensity reaches a certain level, the bubble will expand rapidly and then suddenly close. In this process, a shock wave is generated at the moment when the bubble closes, so that the pressure around the bubble is1012-10/3 Pa, and the local temperature is adjusted. The great pressure generated by this ultrasonic cavitation can destroy insoluble pollutants and differentiate them into solutions, and steam cavitation directly impacts pollutants repeatedly.

On the one hand, it destroys the adsorption of dirt and the surface of cleaning parts, on the other hand, it can cause the fatigue damage of dirt layer and the scrubbing of solid surface by the vibration of bubbles. Once the dirt layer has a crack to drill, bubbles immediately "drill" in, and the vibration causes the dirt layer to fall off. Due to cavitation, the two liquids quickly disperse and emulsify at the interface. When solid particles are wrapped by oil stains and attached to the surface of cleaning parts, the oil is emulsified and the solid particles fall off by themselves. When the ultrasonic wave propagates in the cleaning liquid, it will produce alternating sound pressure, form a jet and impact the cleaning part. At the same time, due to the nonlinear effect, acoustic flow and micro-acoustic flow will be generated, while ultrasonic cavitation will produce high-speed micro-jet at the solid-liquid interface. All these actions can destroy pollutants, remove or weaken the boundary pollution layer, increase the stirring and diffusion, accelerate the dissolution of soluble pollutants, and strengthen the cleaning effect of chemical cleaning agents. It can be seen that any place where liquid can be soaked and any place where sound field exists has cleaning function, and its characteristics are suitable for cleaning parts with very complicated surface shapes. Especially after adopting this technology, the amount of chemical solvent can be reduced, thus greatly reducing environmental pollution.

The second ultrasonic wave propagates in the liquid, so that the liquid and the cleaning tank vibrate together at the ultrasonic frequency. When the liquid and the cleaning tank vibrate, they have their own natural frequency, that is, audio frequency, so people hear buzzing.

In addition, in the ultrasonic cleaning process, the bubbles visible to the naked eye are not vacuum nuclear bubbles, but bubbles, which inhibit cavitation and reduce the cleaning efficiency. Only when the bubbles in the liquid are completely towed away can the cavitation vacuum nuclear bubbles achieve the best effect.