release time:2016/10/17 8:56:51
Ultrasonic technology is one of the general ultrasonic techniques based on physics, electronics, machinery and materials science. Ultrasonic technology is accomplished by the physical process of ultrasonic generation, propagation and reception. Ultrasonic has the characteristics of focusing, orientation and reflection, transmission and so on. According to the ultrasonic vibration radiation size can be divided into:
1, with ultrasonic waves to make objects or physical changes in the power of ultrasonic applications, said power ultrasound, such as: the liquid generated in a large enough energy, resulting in cavitation, can be used for cleaning, emulsification.
2, with ultrasonic information to get a number of information, access to communications ultrasound applications, said the detection of ultrasound, for example: ultrasonic wave reflection in the media on the object thickness test said ultrasonic thickness measurement.
Ultrasonic technology will bring leaping for printing and dyeing Ultrasonic waves are used as cleaning containers, disperse dyes, and powerful means of influencing chemical reactions have been used for many years. However, recently found that ultrasound can be used to improve the reaction rate, reduce the scouring time and dyeing time, improve fabric whiteness. Ultrasound can also improve a variety of textile processing technology, as a widely used ultrasonic technology, with a variety of wet processing capacity. Ultrasonic can change the desizing, scouring, bleaching, dyeing, finishing and washing process. Its use in wet processing can reduce processing time, reduce chemical consumption and energy consumption, and improve product quality.
Ultrasound is a frequency beyond the human hearing range of more than 17kHz sound waves. Ultrasound is like electromagnetic waves, can refraction, focus and reflection, however, and electromagnetic waves are different, electromagnetic waves can be free to spread in the vacuum, and the propagation of ultrasound to rely on elastic media. When it propagates, the particles in the elastic medium oscillate and pass through the medium in the direction of propagation of the ultrasonic waves, which can be divided into longitudinal and transverse waves. In the solid, both can be transported, and in the gas and liquid, only the longitudinal wave can be transmitted. Since the dyeing and finishing process is mostly wet processing, the study of the longitudinal wave of ultrasonic wave is very important.It can make the dyeing layer of the dye liquid dynamic boundary layer, and make the stirring effect, and accelerate the adsorption of the dye on the fiber surface. At the same time, this effect will improve the penetration and leveling effect. Although there are many advantages of ultrasonic dyeing and finishing, but there are many problems to be used in industrial production to be resolved. Such as processing and ultrasonic equipment cost, noise, ultrasonic directivity and other issues. However, we should see the positive aspects of ultrasound, in the near period, the ultrasonic process in the dyeing process, cooking, bleaching and dyeing of ultrasonic applications have made substantial development, the current ultrasonic technology has gradually been introduced to the governance Printing and dyeing wastewater. This shows that efficient ultrasonic not only can speed up the wet processing of fabrics, improve fabric quality, but also save energy and optimize the environment. Many of the advantages of ultrasound, to determine its great potential, the urgent need for scientific workers to actively develop and use.
Ultrasonic cleaning principle
Cleaning the ultrasonic application principle is issued by the ultrasonic generator high-frequency oscillation signal, through the transducer into high-frequency mechanical oscillation and spread to the media, cleaning solvent in the cleaning fluid in the dense phase of the forward radiation, so that the liquid Flow and produce tens of thousands of tiny bubbles, the tiny bubbles (cavitation nuclei) present in the liquid vibrate under the action of the sound field. When the sound pressure reaches a certain value, the bubble grows rapidly and then suddenly closes. When the bubble is closed Produce shock waves, produce thousands of atmospheric pressure around them, destroy the insoluble dirt and disperse them in the cleaning solution. When the group particles are greased and adhered to the surface of the cleaning agent, the oil is emulsified and the solid particles are separated , So as to achieve the purpose of cleaning the surface cleaning parts.