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Koreanhow ultrasound transducers work What is ultrasound: wave can be divided into three types, namely, sub-sonic, sonic and ultrasonic. Times the frequency of sound waves below 20Hz; acoustic frequency 20Hz ~ 20kHz; ultrasonic frequency was 20kHz or more. One of the sub-sonic and ultrasonic most people's ears can not hear. As the high frequency ultrasonic, wave length, and thus spread the good direction, penetrating ability, which is why ultrasonic cleaning machine design reasons.
Ultrasonic cleaning machine works
Ultrasonic cleaning machine works like? Here I will introduce the next major part of its work and procedures, ultrasonic cleaning machine and knowledge of how the principles work. Ultrasonic cleaning machine is the main principle of the transducer, the power of ultrasonic frequency sound energy sources, and to be converted into mechanical vibrations, by cleaning the tank wall so the cleaning liquid in the trough to the ultrasonic radiation. Due to radiation, ultrasound, so that the micro-bubbles in the liquid tank can thus remain under the effect of sound vibrations. When the sound pressure or sound intensity under pressure reaches a certain level when the bubble will expand rapidly, then suddenly closed. During this process, the bubble closed instantly generate shock waves that is created around the 1012-1013pa bubble pressure and the Bureau of the thermostat, the cavitation pressure generated by the insoluble dirt can damage and allow them to differentiate in solution, steam-type cavitation on the dirt directly repeated shocks. On the one hand undermine the dirt and cleaning the surface adsorption layer of dirt on the other hand can cause fatigue and was dismissed from the gas bubble vibration type of solid surface scrub, dirt floor joints can be drilled once the bubble immediately. " drill into "the vibration off the dirty floor, due to cavitation at the interface between two liquids rapidly dispersed and emulsified oil when the solid particles are wrapped and adhere to the cleaning surface, the oil is emulsified, solid particles off on their own, ultrasound cleaning fluid in the transmission of alternating positive and negative when the sound pressure to form a jet, the impact of cleaning parts, and because of nonlinear effects will produce acoustic streaming and micro-acoustic streaming, and cavitation in solid and liquid interface will have a high-speed micro-jet, all of these effects, can destroy dirt, remove dirt or weaken the boundary layer to increase the mixing, diffusion, accelerate the dissolution of soluble contaminants, chemical cleaners work to strengthen the role. Thus, any liquid can be dipped and the sound field has a cleaning effect where there is, which is characterized for surface shape of the very complex parts cleaning. In particular the use of this technology can reduce the amount of chemical solvents, thus greatly reducing environmental pollution.
2 How to complete ultrasonic cleaning
Ultrasonic cleaning is the use of ultrasonic cavitation in the liquid effect, acceleration effect and the role of straight into the flow of liquids and dirt on the direct and indirect effect in that the dirt layer is dispersed, emulsified, stripping to achieve the purpose of cleaning. Currently used in ultrasonic cleaning machine, cavitation and flow straight into the role of the application even more.
(1) cavitation:
Ultrasonic cavitation is more than 20,000 times per second, compression force and reducing stress interactive way to transform the liquid to high-frequency transmission. In reducing the pressure, the liquid bubble nuclei generated in the vacuum phenomenon, the compression force, the nuclear group of the vacuum bubble crushed by the pressure generated when a strong impact, thus stripping the surface to be cleaned of dirt, so as to achieve precise cleaning purposes. In the ultrasonic cleaning process, the naked eye can not see the bubble vacuum bubble nuclei, but the air bubbles, it reduces cavitation dampen the cleaning efficiency. Only the liquid is completely off the air bubbles to go, the vacuum cavitation bubble nuclei in order to achieve the best results.
(2) straight into the stream function:
Ultrasonic sound in the liquid along the propagation direction of the flow produced straight into the phenomenon known as flow. Acoustic intensity 0.5W/cm2 the naked eye can see straight into the stream, perpendicular to the vibrating surface produce flow velocity of about 10cm / s. Straight into the flow through this surface to be cleaned of oil fouling by micro-mixing, surface dirt cleaning fluid convection also dissolved liquid dissolving dirt mixed with the new solution, dissolve faster, plays on the dirt removal large role.
(3) Acceleration:
To promote the acceleration of liquid particles. For high frequency ultrasonic cleaning machine, the role of cavitation is very significant, and when the cleaning liquid depends mainly on the acceleration of particles under the effect of ultrasound on the dirt particles impact of ultra-precision cleaning.
1, Overview:
Certain frequency range of sound waves acting on the liquid medium can play a role in cleaning the workpiece, this cleaning technology since its inception, has been widespread concern all walks of life. The use of ultrasonic cleaning greatly improves the cleaning efficiency and effectiveness in the past, cleaning corners, blind holes and difficult to reach the filth has been to make people feel more at a loss, development and application of ultrasonic cleaning a breeze to make this work. In recent years, with the ever-changing electronic technology, ultrasonic cleaning is also closely linked with our daily work, ultrasonic cleaning machine through several generations of evolution, more advanced technology, the effect is more significant, the same, its price is also increasingly being acceptable to the community in all walks of life increasingly widely used. Ultrasound is 46,000 times per second the vibration in the liquid conduction, because ultrasound is a compression wave in the medium to promote the use of liquid under pressure to make changes due to numerous tiny vacuum bubbles, resulting in the hole effect, when pressure when the bubble burst, it will have a strong impact, while there emulsification and the role of ultrasound can more effectively prevent oil from being washed to re-attach objects to be cleaned.
2, the application scope:
All the way in cleaning, ultrasonic cleaning is the most efficient, best one, so why ultrasonic cleaning effect can be achieved, with its unique cleaning method works and closely related. We know that in the production and life, a lot of things that need cleaning, and links need to be cleaned are many types, such as: object removal of contaminants, and clear the small holes, a common method of hand-cleaning shelter undoubtedly shaped objects and objects can not be meet the requirements, even steam cleaning and high pressure water jet cleaning can not meet the high demand for cleanliness, ultrasonic cleaning of objects but also to kill the bacteria, dissolved organic pollutants, prevent excessive corrosion, etc. Therefore, ultrasonic cleaning is increasingly widely used in various industries:
(1) machinery industry: anti-rust oil removal; measuring cleaning; mechanical parts degreasing rust; engine, carburetor and parts cleaning; filters, filter cleaning to clear.
(2) surface treatment: degreasing prior to plating rust; ion plating before cleaning; phosphating; remove coke; remove oxide; remove polishing paste; metal surface activation treatment.
(3) Instruments industry: high-precision parts cleaning before assembly cleanliness.
(4) electronics: printed circuit board in addition to rosin, weld spots; high-voltage contacts and so on mechanical and electronic parts cleaning.
(5) Medical Industry: Medical Devices cleaning, disinfection, sterilization, cleaning and other labware.
(6) the semiconductor industry: high cleanliness cleaning semiconductor wafers.
(7), the first watch, jewelry industry: remove sludge, dust, oxide, polishing ointment.
(8) chemical, biological industry: labware cleaning, descaling.
(9) the optical industry: optics, degreasing, in addition to sweat, cleaning and so on.
(10) The textile industry: cleaning of textile spindles, spinning plates.
(11) Petroleum and Chemical industry: filter cleaning to clear the metal, chemical containers, switches, cleaning and so on.
3, the advantages of ultrasonic cleaning:
Compared to many other methods of cleaning, ultrasonic cleaning machine has shown significant superiority. Especially in the specialization, the production enterprises, ultrasonic cleaning machines have been gradually replaced the traditional dip, brush, pressure washing, steam cleaning vibration cleaning and process methods. Ultrasonic cleaning machine high efficiency and high cleanliness, thanks to its sound waves propagating in the medium penetration and cavitation generated shock wave. So it is easy to shape with a complex, fine empty cavity and clean parts, general degreasing, rust, phosphate and other processes, in just under ultrasonic twenty-three minutes to complete, its speed than traditional methods can be increased several times to several times, but also to achieve high standards of cleanliness, which in many of the products require a higher surface quality and productivity of occasions, but has highlighted the use of other treatment methods are difficult to reach or can not be replaced the results. Summarize its advantages as follows:
(1) cleaning fast, effective cleaning, high cleanliness, cleanliness workpiece consistent, on the surface without damage.
(2) does not need manual exposure to cleaning solutions, safe and reliable deep hole, slit, and also clean the workpiece shelter.
how ultrasound transducers work
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