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Introduction to ultrasonic cleaning machines

Pulished:2017-04-11 Number:loading... Source:Suzhou Nuohu

Ultrasonic waves in the liquid, so that the liquid and the cleaning tank at the ultrasonic frequency vibration together, the liquid and cleaning tank vibration has its own natural frequency, this vibration frequency is the acoustic frequency, so people hear the buzz. With the continuous development of the cleaning industry, more and more industries and enterprises to use the ultrasonic cleaning machine. The principle of ultrasonic cleaning machine by the ultrasonic generator issued by the high-frequency oscillation signal, through the transducer into high-frequency mechanical oscillation and spread to the medium - cleaning solvent, ultrasonic cleaning fluid in the dense phase of the forward radiation, so that Liquid flow and produce tens of thousands of diameter of 50-500μm tiny bubbles, the presence of tiny bubbles in the liquid under the action of the sound field vibration. These bubbles form and grow in the negative pressure zone of the longitudinal propagation of the ultrasonic waves. In the positive pressure zone, when the sound pressure reaches a certain value, the bubbles rapidly increase and then suddenly close. And in the bubble closed when the shock wave, in its surrounding thousands of atmospheric pressure, destruction of insoluble dirt and make them dispersed in the cleaning fluid, when the group particles are oil-wrapped and adhere to the surface of the cleaning agent, the oil is emulsified, solid Particles and detachment, so as to achieve the purpose of cleaning pieces. In this process known as the "cavitation" effect, the bubble closure can form several hundred degrees of high temperature and more than 1000 air pressure instantaneous high pressure. Ultrasonic cleaning machine has the advantage of: ultrasonic cleaning effect is good, easy to operate. People hear the sound is the frequency of 20-20000Hz acoustic signal, higher than 20000Hz sound waves called ultrasonic, acoustic transmission in accordance with the sinusoidal longitudinal transmission, resulting in a large number of small bubbles. One reason is that the local tensile stress in the liquid and the formation of negative pressure, the pressure reduction of the original dissolved in the liquid gas supersaturation, and from the liquid escape, become a small bubble; another reason is the strong tensile stress to "tear" "Into an empty, called cavitation.


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