At present, some ultrasonic cleaning machine products, glued to the bottom of the cleaning tank or the wall of the transducer distribution is too dense, a close to one of the arrangement. Input ultrasonic transducer Power intensity of 2-3 watts per square centimeter, such a high strength will speed up the surface of the stainless steel plate (with the cleaning fluid contact the surface) of cavitation corrosion, shorten the service life, on the other hand due to high sound intensity. will produce a large number of large bubbles near the surface of the plate, increase the sound transmission loss, in the place away from the transducer to weaken the cleaning effect. The general selection of power intensity per square centimeter below 1.5 watts is advisable (according to the adhesion of the plate area of the transducer). If the cleaning groove is deep, the bonding transducer should also be considered in the groove wall except for the bottom of the groove.
The bonding quality of transducer and cleaning groove has great influence on the quality of ultrasonic cleaning machine. Not only to adhere to the glue, but also require uniform, no glue and no cracks, so that the ultrasonic energy to the maximum to the cleaning fluid transmission, to improve the efficiency of the machine and cleaning effect. At present, some cleaning equipment to prevent the transducer from falling off the cleaning tank. The use of screws and viscose in a fixed way, this connection mode although the transducer will not fall down, but there are many hidden dangers. If the screw welding quality is poor, such as not perpendicular to the surface of the stainless steel plate, the adhesive layer is uneven, and even cracks or lack of glue, energy transmission will weaken; If welding bad will also affect the surface of stainless steel, resulting in accelerated cavitation corrosion, shorten service life. One of the methods to judge the quality of bonding is to measure the temperature rise of the transducer after the cleaning tank is loaded with water and working for a period of time. If the temperature rise of a transducer in a large number of transducers is particularly fast, it indicates that the transducer may not bond well. Because the sound radiation is not good, most of the electrical energy consumed in the transducer and heat. Another method is to measure the resistance of the transducer to determine the bonding quality under small signal conditions.
At present, there are some vague understandings on the performance of Ultrasonic cleaning machine: the higher the power, the more the number of ultrasonic transducer. The better the performance, the higher the value, even with this fixing. This understanding is not comprehensive. such as the above, the transducer cloth has been too dense, power density is too large, not only the cleaning effect is not good, and the trough is easy to cavitation corrosion.
On the other hand, at present, the power of ultrasonic cleaning machine is mostly electric power rather than sound power, if the standard refers to the consumption of power frequency, then the quality of ultrasonic cleaning machine should be judged by efficiency. If the efficiency is low, the same cleaning effect will be a big power consumption, but increase the user's cost. The efficiency of Ultrasonic cleaning machine consists of two parts. One is the efficiency of the ultrasonic power supply. That is the percentage of the input transducer's high-frequency power and power frequency power; the other part is the efficiency of electro-acoustic conversion, that is, the percentage of the sound power entering the cleaning fluid and the power of the input transducer. At present, there is not a simple method and equipment to measure the efficiency of electro-acoustic conversion in industrial production in China. The power of the ultrasonic cleaning machine of each manufacturer is ambiguous and it is urgent to have the uniform standard of the industry.