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You are here: Home / News / Ultrasonic Transducer information / Arrangement and power density of ultrasonic transducer used in the ultrasonic cleaner

Arrangement and power density of ultrasonic transducer used in the ultrasonic cleaner

Views:3     Author:Site Editor     Publish Time: 2019-06-11      Origin:Site

Ultrasonic transducer, ultrasonic transducer front and rear pressure block, ultrasonic vibration rod, ultrasonic generator, ultrasonic crusher, ultrasonic vibrating screen and series of products .This product is widely used in the industrial ultrasonic cleaner transducer pack, ultrasonic welding equipment, ultrasonic sewage treatment , paint, petroleum, metal powder, automotive, circuit board, medical equipment, optical glass, precision hardware, electroplating chemicals, liquid crystal display and other fields, two: digital power controller, solid state relay and industrial automation control products Mainly used in plastic machine, plastic processing and other industries, another company agent products; Germany STEIMEX travel switch; South Korea RAINBOW thermostat, Taiwan strange INFRAPARA heating brick, Germany Elstein heating brick, intelligent thermostat, etc. , keeping promises. Customer satisfaction is our greatest pursuit! We are constantly improving, perfecting, improving, welcome you to give us valuable comments and suggestions!

Ultrasonic transducer vibration cleaning (generally referred to as vibrators or vibrators in the cleaning industry) currently have ultrasonic cleaning machines in the cleaning tank. The transducers stuck to the bottom or wall of the cleaning tank are too densely , one next to the other. The input transducer has a power intensity of 2-3 watts per square centimeter. This high strength accelerates the cavitation corrosion of the surface of the stainless steel plate (the surface in contact with the cleaning fluid) and shortens the service life. A large number of large bubbles are generated near the surface of the steel sheet, which increases the sound propagation loss and weakens the cleaning action away from the transducer. Generally, the power intensity is preferably 0.75 watts per square centimeter (calculated according to the area of the steel plate to which the transducer is attached). If the cleaning tank is deep, in addition to the transducer at the bottom of the tank, the bonded transducer should also be considered on the wall of the tank, or only on both sides of the tank.

The bonding quality of the transducer and the cleaning tank has a great influence on the quality of the ultrasonic cleaning machine. Not only should it be adhered, but also the glue layer should be uniform, no glue and no cracks allowed, so that the ultrasonic energy can be transmitted to the cleaning liquid to the maximum to improve the efficiency and cleaning effect of the whole machine. Some cleaning equipment is currently used to prevent the transducer from falling off the cleaning tank. The fixing method of the screw and the glue is adopted, and the connection method can well prevent the transducer from falling down. However, which pay attention to the quality of screw welding. If it is not perpendicular to the surface of the stainless steel plate, the rubber layer will be uneven, even if there is crack or lack of glue, the energy transmission will be weakened; If the welding is not good, it will affect the smoothness of the stainless steel surface,which is leading to accelerated cavitation corrosion and shortening the service life, so the welding quality is very important. When bonding, the bonding surface needs to increase the surface roughness. Generally, sandblasting is used. Most domestic manufacturers do not have this process.

One of the methods for judging the quality of the bond is to measure the temperature rise of the transducer after the tank is filled with water and turned on for a period of time. If the temperature has the rising 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 at this time, most of the electric energy is consumed on the transducer and generates heat. Another method is to measure the impedance of the transducer one by one under small signal conditions to determine the bond quality.

At present, there are some vague understandings on the performance of ultrasonic cleaners: the larger the power, the more the number of transducers. The better the performance, the higher the value, and even the price. This kind of understanding is not comprehensive. As mentioned above, the transducer is too dense and the power density is too large, which will not only damage the surface of the workpiece (the energy is focused by the ultrasonic waves), but also the bottom of the groove is cavitation. On the other hand, the current power of piezoelectric cleaning transducer is mostly sound power rather than electric power. If the standard refers to the consumption of power frequency, the quality of the ultrasonic cleaning machine should be judged by efficiency. If the efficiency is low, the power consumption is large in the same cleaning effect, which increases the user's cost. The efficiency of the ultrasonic cleaner consists of two parts. First, the efficiency of the ultrasonic frequency power supply. That is, the percentage of the high-frequency electric power to the transducer and the power-frequency electric power consumed; the other part is the electro-acoustic conversion efficiency, that is, the percentage of the acoustic power entering the cleaning liquid and the electric power input to the transducer. At present, there is no simple method and equipment for measuring electroacoustic conversion efficiency in industrial production in China. The power of the ultrasonic cleaning machine marked by each manufacturer is ambiguous and does not form a unified standard for the industry.

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