How to choose the frequency of ultrasonic disperser
Selection of power frequency of ultrasonic dispersion equipment and factors affecting dispersion effect
Ultrasonic dispersion is the use of ultrasonic energy through electrical energy into tens of thousands of times per second of mechanical energy, acoustic cavitation -- the formation of liquid bubbles, vibration, growth, contraction, and even collapse, the physical and chemical changes caused by the machine. The physical, mechanical, thermal, biological and chemical effects caused by cavitation can disperse our processed materials to micron or even nanometer level through the vibration of cavitation,
Ultrasonic emulsification can be used in many cases where the particle size is less than 1 μ M. The formation of this high quality emulsion is mainly due to the strong cavitation effect of ultrasonic wave near the dispersing tool. The diameter of the calibrator is less than 1 μ M
The introduction of ultrasonic dispersion parameters and the power factor of ultrasonic dispersion
1: Frequency refers to the number of ultrasonic vibrations,
2: Amplitude (ultrasonic intensity) is the amplitude of ultrasonic vibration, ultrasonic is a sine wave, the amplitude is the peak.
3: Emission surface: refers to the size of the part of ultrasonic wave immersed in liquid. The larger the diameter and length of the part deep into liquid, the larger the emission surface
4: Customer's working environment: with the more and more wide range of ultrasonic application, the application place is also different. The viscosity, temperature and corrosiveness of the liquid are different. First of all, the viscosity: if the above 1 2 The parameters of the three points are the same, but the viscosity of the customer is different, one is water and the other is oil. If the ultrasonic wave needs to do the same action, the power generated by it is also different.
Temperature effect: the temperature of the liquid will lead to the temperature change of the ultrasonic tool head deep into the liquid. When we design the tool head, the length of the tool head determines its specific frequency, because the temperature of the liquid changes the temperature of the tool head, and the frequency of the tool head will change because of the principle of thermal expansion and cold contraction.
Corrosivity: the function of ultrasonic in liquid depends on the cavitation effect of ultrasonic, which will also lead to cavitation of ultrasonic tool head, resulting in cavitation of ultrasonic tool head. The factors affecting cavitation of ultrasonic tool head include 1: amplitude of ultrasonic, 2: frequency of ultrasonic, 3: whether the liquid will corrode the material of ultrasonic tool head, because the ultrasonic is working If it will corrode, the ultrasonic wave itself will accelerate its cavitation.
How to choose the frequency of ultrasonic dispersion
Ultrasonic dispersion is the use of ultrasonic energy through electrical energy into tens of thousands of times per second of mechanical energy, acoustic cavitation -- the formation of liquid bubbles, vibration, growth, contraction, and even collapse, the physical and chemical changes caused by the machine. The physical, mechanical, thermal, biological and chemical effects caused by cavitation can disperse the materials we process to micron or even nanometer through the vibration of cavitation
First of all, we need to determine the purpose of using ultrasound: experimental or industrial use, or use the experiment to do industrialization. Because when we consider using ultrasound, we may not know the specific effect of ultrasound, so we need to do a small test, but if we choose ultrasound.