The high-frequency oscillation signal emitted by the ultrasonic generator is converted into high-frequency mechanical oscillation by the transducer and propagated to the medium-the cleaning solvent. Ultrasonic waves in the cleaning liquid radiate forward in dense and dense phases, causing the liquid to flow Tens of thousands of tiny bubbles. These bubbles form and grow in the negative pressure area where the ultrasonic waves propagate longitudinally, and close quickly in the positive pressure area. In this process called the "cavitation" effect, the bubble closing can form an instantaneous high pressure of more than 1000 atmospheres, and the continuous generation of the instantaneous high pressure is like a series of small "explosions" constantly hitting the surface of the object, making the object's The dirt in the surface and the gaps peels off quickly, so as to achieve the purpose of purifying the surface of the object.


The following figure is a cross-sectional view of a transducer working in water:


In the middle is a layer of stainless steel plate with a certain thickness. The transducer head is bonded to this layer of steel plate. An AC signal of a certain frequency and voltage is generated by the ultrasonic generator to drive the transducer head and the stainless steel plate to make high-frequency vibration. When the steel plate vibrates upwards, push the water upwards. When the steel plate vibrates downwards, the water cannot keep up with the vibration speed of the steel plate, and a gap will be formed between the water and the steel plate, so that repeated vibrations will form many bubbles, such as The picture shows: this kind of bubble is caused by the "cavitation effect", we call it cavitation bubble. The cavitation bubble propagates into the water along the vibration direction. If there is a workpiece in the water, the cavitation bubble hits the surface of the workpiece to generate an impact force of thousands of atmospheric pressure, which causes the dirt on the surface of the workpiece to fall off.