ultrasonic cleaningPrinciple:

The principle of ultrasonic cleaning machine is mainly to use a transducer to convert the sound energy of the power ultrasonic frequency source into mechanical vibration, and to irradiate the cleaning solution in the tank into ultrasonic waves through the cleaning tank wall. Due to the radiation of ultrasonic waves, microbubbles in the liquid inside the tank can maintain vibration under the action of sound waves.

When the sound pressure or intensity reaches a certain level of pressure, bubbles will rapidly expand and then suddenly close. During this process, a shock wave is generated at the moment when the bubble closes, causing a pressure of 1012-1013pa and local temperature adjustment around the bubble. The enormous pressure generated by ultrasonic cavitation can destroy insoluble pollutants and cause them to differentiate into the solution. Steam type cavitation has a direct reverse impact on the pollutants.

On the one hand, it can destroy the adsorption between the dirt and the surface of the cleaning part, and on the other hand, it can cause fatigue damage of the dirt layer and be rejected. The vibration of gas bubbles cleans the solid surface. Once there is a gap in the dirt layer that can be drilled, the bubbles immediately "drill in" and vibrate to make the dirt layer fall off. Due to cavitation, the two liquids quickly disperse and emulsify at the interface. When solid particles are wrapped in oil and adhere to the surface of the cleaning part, the oil is emulsified and the solid particles fall off on their own. When ultrasound propagates in the cleaning liquid, positive and negative alternating sound pressure is generated, forming a jet that impacts the cleaning part. At the same time, due to nonlinear effects, acoustic flow and micro acoustic flow are generated. Ultrasonic cavitation produces high-speed micro jets at the interface between solid and liquid. All of these effects, capable of destroying dirt, removing or weakening boundary fouling layers, Increase stirring and diffusion effects, accelerate the dissolution of soluble pollutants, and enhance the cleaning effect of chemical cleaning agents. From this, it can be seen that wherever a liquid can penetrate and a sound field exists, there is a cleaning effect, which is suitable for cleaning parts with very complex surface shapes. Especially after adopting this technology, the amount of chemical solvents used can be reduced, greatly reducing environmental pollution.

How to complete cleaning work with ultrasound:

Ultrasonic cleaning utilizes the cavitation, acceleration, and direct flow effects of ultrasonic waves in liquids to directly and indirectly disperse, emulsify, and peel off the dirt layer, achieving the purpose of cleaning. Currently, cavitation and direct flow are more commonly used in ultrasonic cleaning.
(1) Cavitation effect: Cavitation effect refers to the high-frequency transformation of ultrasonic waves into liquids through the interaction of compression force and decompression force at a rate of more than 20000 times per second. When the pressure is reduced, a phenomenon of vacuum nucleus bubbles is generated in the liquid. When the compression force is applied, the vacuum nucleus bubbles are crushed by the pressure and generate a strong impact force, thereby peeling off the dirt on the surface of the cleaned object and achieving precision.

Cleaning purpose.
In the ultrasonic cleaning process, the visible bubbles are not vacuum core bubbles, but air bubbles, which can suppress cavitation and reduce cleaning efficiency. Only when the air bubbles in the liquid are completely removed, can the vacuum core bubble of cavitation achieve the best effect.
(2) Direct flow effect: The phenomenon of ultrasonic waves flowing along the direction of sound propagation in liquid is called direct flow. Sound wave intensity at 0.5W/cm²The naked eye can see a straight flow, which is perpendicular to the vibration surface and generates a flow velocity of about 10cm/s. Through this direct flow, the micro oil dirt on the surface of the cleaned object is stirred, and the cleaning solution on the dirt surface also generates convection. The solution that dissolves the dirt mixes with the new liquid, accelerating the dissolution rate and playing a significant role in the transportation of dirt.
(3) Acceleration: The acceleration generated by the propulsion of liquid particles. For high-frequency ultrasonic cleaning machines, the cavitation effect is not significant. At this time, the cleaning mainly relies on the acceleration of liquid particles under the action of ultrasonic waves to impact particles for ultra precision cleaning of dirt.

The advantages of ultrasonic cleaning:

Compared to other cleaning methods, ultrasonic cleaning machines have shown great superiority. Especially in specialized group production enterprises, ultrasonic cleaning machines have gradually replaced traditional processes such as immersion washing, brushing, pressure washing, vibration cleaning, and steam cleaning. The high efficiency and high cleanliness of ultrasonic cleaning machines are attributed to the penetrability and cavitation shock waves generated by the propagation of sound waves in the medium. So it is easy to clean parts with complex shapes, internal cavities, and small voids. For general processes such as oil removal, rust prevention, and phosphating, ultrasonic waves can be completed in just two to three minutes. The speed can be increased by several times to tens of times compared to traditional methods, and the cleanliness can also reach high standards. This highlights the results that are difficult to achieve or can be replaced by other treatment methods in many situations where high surface quality and productivity are required for products.

The composition of ultrasonic cleaning:

The ultrasonic cleaning machine mainly consists of two parts: an ultrasonic cleaning tank and an ultrasonic generator. The ultrasonic cleaning tank is made of high-quality stainless steel that is sturdy, elastic, and corrosion-resistant, and is equipped with ultrasonic transducers at the bottom or sides; The ultrasonic generator generates high frequency and high voltage, which is transmitted to the transducer through the cable connection line. The transducer resonates with the vibration plate at high frequency, thereby allowing the solvent in the cleaning tank to be cleaned of dirt by ultrasonic waves.

Equipment parameters
·Cleaning cycle: Preliminary estimate is about 2-10 minutes, and the specific difficulty of cleaning the actual object will depend on it. (Manual operation and transmission);
·Ultrasonic power: 300W;
·Heating power: 400W
·Slot size inside the slot: L330MM * W300MM * H150MM (inner slot)
·Equipment working requirements:
·Occupation size: (mm); L355 * W325 * H330mm, the specific size is subject to the actual size.
·Power supply: 220V ± 10%/50Hz
·Work environment requirements:
·Air temperature: 5-35 ℃;
·Relative humidity: ≤ 80%;