Ultrasonic cleaning method, based on the excitation of ultrasonic vibration in the washing solution, implies cleaning the surface of solid materials safely and easily. A scientific basis for creation and development of the technology, as well as ultrasonic cleaning equipment, aroused from acoustic cavitation researches, conducted by Professor L.Rozenberg.

Ultrasonic cleaning can replace manual labor, thereby speeding up the cleaning process, ensuring a high degree of surface cleanliness, almost completely eliminating the need in utilizing flammable and toxic solvents. Ultrasonic cleaning process is characterized by several phenomena that occur in high intensity ultrasound field (e.g. acoustic cavitation, acoustic flows, radiation pressure, sonocapillary effect and etc.).

The processes that influence purification

Studies have shown that, depending on the type of dirt, the predominant role in purification is played by various processes . Therefore, the elimination of dirt occurs mainly under the influence of pulsating cavitation bubbles.The pulsating bubbles, making intense vibrations, affect the edges of the contamination film, penetrate it and detach the dirt components.

Radiation pressure and sonocapillary effect contribute to the penetration of cleaning solution into the micropores, bumps and blind channels. Acoustic streaming guarantees rapid removal of contaminants from the surface. If a dirt clot is firmly connected to the surface, collapsing cavitation is required for elimination, the method makes a microshock impact on surface.

Optimal ultrasonic intensity

To activate the desired mode cleaning ultrasonic it is absolutely essential to set the optimal ultrasonic intensity and frequency values. With increasing frequency, the cavitation bubbles doesn’t reach the final stage of the collapse, reducing the influence of cavitation microshock. An excessive frequency lowering leads to an increase in noise level, requiring an increase in the size of the radiator. That’s why an overwhelming majority of most industrial plants operates in the range of 18-44 kHz.

Improving ultrasound intensity above a certain limit leads to an increase in the peak value of pressure, and this is how cavitation bubbles degenerate into pulsating ones. At low intensities cavitation and all the secondary effects that arise during applying liquid ultrasonic vibrations, are weakly expressed.

An efficient detergent

A properly selected detergent plays a great role in the process of cleaning. It is highly recommended to consider the characteristics of the material needed to be cleaned and the nature of contamination beforehand. A cleaning powder must chemically interact with the surface of the contamination only, but not with the fibers of the material.

The bathtub options to consider

Actually, the bath may be of any volume, stainless steel options may be considered freely. Frankly speaking, both standard and seamless models can be utilized. For the treatment of articles in an acidic bath solution it is better to use a bathtub covered with a special protective coating, typically teflon. Electroacoustic transducers convert the energy of electric oscillations into acoustic. For excitation of acoustic oscillations in an ultrasonic bath piezoelectric transducers are used.

The principles of ultrasound generator functioning

Ultrasonic generator is utilized for excitation of the electroacoustic transducers and maintains optimal conditions for the power transmission to the load. This determines the circuit design peculiarities of ultrasonic generators. Therefore, a variety of self-excited circuits are turned to account.

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Author Bio: Purchasing a reliable ultrasonic cleaners Hilsonic Company specializes in ultrasonic equipment manufacturing, standing out from the crowd with extremely efficient and powerful solutions. Take advantage of purchasing a decent ultrasonic cleaner from a proven and reliable vendor – the products by Hilsonic are highly appreciated for simply stunning quality and extensive durability.