Ultrasonic waves propagate in the liquid, causing the liquid to vibrate together with the cleaning tank at the ultrasonic frequency. When the liquid and the cleaning tank vibrate, they have their own natural frequencies. This vibration frequency is the acoustic frequency, so people hear the humming sound. With the continuous development of the cleaning industry, more and more industries and enterprises have applied ultrasonic cleaning machines.
The high-frequency oscillating signal emitted by the ultrasonic generator on the principle of the ultrasonic cleaning machine is converted into a high-frequency mechanical oscillation by the transducer and propagated to the medium--cleaning solvent, and the ultrasonic waves are radiated in the cleaning liquid in a dense manner. The liquid flows to generate tens of thousands of tiny bubbles having a diameter of 50-500 μm, and the tiny bubbles existing in the liquid vibrate under the action of the sound field.
Studies have shown that when ultrasonic waves act on liquids, the rupture of each bubble in the liquid will produce a shock wave with great energy, which is equivalent to instantaneously generating several hundred degrees of high temperature and up to thousands of atmospheres. This phenomenon is called " "Cavitation", ultrasonic cleaning is the use of shock waves generated by the bursting of bubbles in the liquid to clean and flush the inner and outer surfaces of the workpiece.
Ultrasonic waves propagate in the liquid, causing the liquid to vibrate together with the cleaning tank at the ultrasonic frequency. When the liquid and the cleaning tank vibrate, they have their own natural frequencies. This vibration frequency is the acoustic frequency, so people hear the humming sound.
Ultrasonic wave is a kind of mechanical wave whose vibration frequency is higher than sound wave. It is generated by the vibration of the transducer wafer under the excitation of voltage. It has high frequency, short wavelength, small diffraction phenomenon, especially good directionality, and can be oriented as a ray. Characteristics such as communication. Ultrasonic penetration of liquids and solids is very large, especially in sunlight opaque solids, which can penetrate depths of several tens of meters. When an ultrasonic wave hits an impurity or an interface, it will produce a significant reflection to form a reflection into an echo, which can produce a Doppler effect when it hits a moving object. Therefore, ultrasonic testing is widely used in industrial, national defense, biomedical and other aspects.
Ultrasonic cleaning machine adopts the principle of ultrasonic cleaning, which can achieve the overall clean cleaning effect of the object. Especially for deep hole, blind hole and concave groove cleaning, it is the most ideal equipment, which does not affect the material and precision of any object. At the same time, it can be used for extraction, degassing, mixing, cell pulverization and nano-decomposition in experiments in biochemistry, physics, chemistry, medicine, scientific research and colleges and universities.
working principle
What is the working principle of the ultrasonic cleaning machine? Here are the main steps and steps of the work, and the principle and knowledge of how the ultrasonic cleaning machine works. The principle of the ultrasonic cleaning machine is mainly to convert the acoustic energy of the power ultrasonic frequency source into a transducer, and to convert it into mechanical vibration, and to clean the groove to make the cleaning liquid in the groove radiate to the ultrasonic wave. Due to the ultrasonic waves being radiated, the microbubbles in the liquid in the tank can be kept vibrating under the action of sound waves. When the sound pressure or sound intensity is reached to a certain extent by the pressure, the bubble expands rapidly and then suddenly closes. During this process, the shock wave is generated at the moment when the bubble is closed, so that the pressure around the bubble is 1012-1013pa and the local temperature is adjusted. The huge pressure generated by the ultrasonic cavitation can destroy the insoluble dirt and cause them to differentiate into the solution. The direct repeated impact of steam-type cavitation on dirt.
On the one hand, it destroys the adsorption of dirt and the surface of the cleaning member, on the other hand, it can cause the fatigue damage of the dirt layer to be rejected, the vibration of the gas-type bubble scrubs the solid surface, and once the seam is drilled, the bubble immediately “ Drilling into the vibration causes the soil layer to fall off. Due to cavitation, the two liquids are rapidly dispersed and emulsified at the interface. When the solid particles are wrapped by the oil and adhere to the surface of the cleaning member, the oil is emulsified and the solid particles fall off by themselves. When propagating in the cleaning solution, it will produce positive and negative alternating sound pressure, forming a jet, impacting the cleaning member, and at the same time, the acoustic flow and the micro-acoustic flow will be generated due to the nonlinear effect, and the ultrasonic cavitation will generate high speed at the solid and liquid interface. Micro-jet, all these effects, can destroy dirt, remove or weaken the boundary fouling layer, increase the stirring and diffusion, accelerate the dissolution of soluble dirt, and strengthen the cleaning effect of chemical cleaning agent. It can be seen that all the places where the liquid can be immersed and the sound field exists have a cleaning effect, and the characteristics are suitable for the cleaning of 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.
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