As we all know, people hear the sound frequency of 20 Hz to 20,000 Hz sound wave signal, higher than 20,000 Hz sound wave is called ultrasonic, sound wave in accordance with the sine curve longitudinal transmission, that is, a layer of strong and weak, in turn, transmission, when the weak acoustic signal acts on the liquid, it will produce a certain negative pressure on the liquid, causing many tiny bubbles to form in the liquid, while when the strong acoustic signal acts on the liquid, will produce a certain positive pressure on the liquid, thus, the formation of small bubbles in the liquid is crushed. Studies have shown that when Sonication in a liquid, the bursting of each bubble in the liquid produces the most powerful shock wave, equivalent to the instantaneous high temperature and up to thonds of atmospheres of pressure, this phenomenon is called“Cavitation effect”. Ultrasonic cleaning is the application of the shock wave generated by the bubble break in the liquid to clean and wash the internal and external surfaces of the workpiece.

                                                                                          

Ultrasonic wave can be divided into three kinds, namely infrasound wave, sound wave, ultrasonic wave. Infrasound frequency is below 20Hz, acoustic frequency is 20Hz ~ 20kHz, ultrasonic frequency is above 20kHz. Among them infrasound wave and super-lu wave average person ear is inaudible. Because of its high frequency and short wavelength, Loupot has good directivity and penetration.
The principle of the ultrasonic cleaning machine is to convert the sound energy of the power ultrasonic frequency source into mechanical vibration through the wall of the cleaning tank so that the cleaning solution in the tank can be radiated to the ultrasonic wave. As a result of the ultrasonic radiation, so that the micro-bubbles in the liquid groove under the action of sound waves to maintain vibration.
When the pressure of sound pressure or intensity reaches a certain level, the bubble will expand rapidly, and then suddenly closed. During this process, the shock wave is generated at the moment of bubble closing, which causes a pressure of 1012Pa ~ 1013Pa around the bubble. The pressure generated by ultrasonic gasification can destroy insoluble pollutants and cause them to differentiate into solution.
On the one hand, ultrasonic wave can destroy the adsorption between the dirt and the surface of clean parts, on the other hand, it can cause the fatigue damage of the dirt layer and peel off. The vibration of gas-type bubbles can scrub the solid surface, and once the dirt layer has a crack, it can be drilled, the air bubbles immediately“Drill in” and vibrate, causing the dirt layer to fall off. Due to cavitation, the two liquids quickly disperse and emulsify at the interface. When the solid particles are coated by oil and adhere to the surface of the cleaning piece, the oil is emulsified, when the sound propagates in the clear cleaning solution, it will produce an alternating sound pressure, forming a jet, which will impact the cleaning parts, and at the same time, because of the non-linear effect, it will produce sound flow and micro-sound flow, and ultrasonic cavitation can produce high-speed micro-jet at the interface of solid and liquid, all of which can destroy the dirt, remove or weaken the boundary layer, increase the agitation and diffusion, accelerate the dissolution of soluble dirt, enhance the cleaning effect of chemical cleaning agent.
Thus, it can be seen that the cleaning effect can be achieved wherever the liquid can be immersed and the sound field is present. The cleaning feature is suitable for cleaning parts with very complicated surface shapes. In particular, the use of this technology can reduce the amount of chemical solvents, thereby greatly reducing environmental pollution.
Points for attention in use of ultrasonic cleaning machine
1. The power supply of the ultrasonic cleaning machine and the power supply of the electric heater shall be properly grounded.
2. It is strictly forbidden to start the ultrasonic cleaning machine without cleaning fluid, that is, the cleaning cylinder should not be switched on without adding a certain amount of cleaning fluid./n/n3. Do not turn on the heating switch when there is no liquid in the cleaning equipment with heating equipment.
4. Do not use heavy objects (iron parts) to clean the bottom of the cylinder to avoid damage to the chip of the converter.
5, ultrasonic generator power supply should be used alone a way of 220V/50Hz power supply and install more than 2000W voltage regulator.
6. Clean the bottom of the tank regularly without excessive sundries or dirt.
7, each time when the new liquid, after the start of the ultrasonic, can be washed.