1, the energy function of ultrasonic wave
Ultrasonic energy is high. When it propagates in the medium liquid, it transfers energy to the medium particles, and then the medium particles transfer energy to the surface of the object to be cleaned, and the dirt is dissociated and dispersed. Sound waves are longitudinal waves, that is, the vibration direction of dielectric particles is consistent with the propagation direction of waves. In the process of longitudinal wave propagation, the movement of particles in the medium causes uneven particle distribution and different density regions. In sparse distribution area, sound waves form negative sound pressure, and in dense distribution area, sound waves form positive sound pressure, forming negative sound pressure and positive sound pressure alternating continuously. This change not only makes the dielectric particles gain a certain kinetic energy, but also gains a certain acceleration. The energy function of high-frequency ultrasound is extremely great. When medium particles with energy interact with dirt particles, they transfer energy to dirt and cause the decomposition and dispersion of dirt.
2. Acceleration: the acceleration generated by the pushing of liquid particles. For high-frequency ultrasonic cleaning machine, cavitation effect is very insignificant. At this time, the cleaning mainly depends on the ultra-precision cleaning of dirt by the accelerated impact of liquid particles under the action of ultrasonic waves.
3. Direct inflow: The phenomenon that ultrasonic waves flow in the direction of sound propagation in liquid is called direct inflow. When the intensity of sound wave is 0.5W/cm2, the naked eye can see a straight inflow, resulting in a flow perpendicular to the vibration surface, with a speed of about10 cm/s. Through this direct inflow, the micro-oil dirt on the surface of the object to be cleaned is stirred, and the cleaning liquid on the surface of the dirt also generates convection, and the dissolved liquid that dissolves the dirt is mixed with new liquid, which accelerates the dissolution speed and plays a great role in the transportation of the dirt.