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超声波震头在超声波清洗槽中的分布及特点

来源:http://www.sinokohl.com/ 时间: 2022-01-19 浏览次数: 2

目前有些超声清洗机,粘在清洗槽底或壁上的换能器分布过密,一个紧挨一个的排列.输入换能器的功率强度达到每平方厘米2-3瓦,这样高的强度一方面会加快不锈钢板表面(与清洗液接触的表面)的空化腐蚀,缩短使用寿命,另一方面由于声强过高。
At present, in some ultrasonic cleaning machines, the transducers adhered to the bottom or wall of the cleaning tank are densely distributed, one by one. The power intensity of the input transducer reaches 2-3 watts per square centimeter. On the one hand, such high intensity will accelerate the cavitation corrosion of the stainless steel plate surface (the surface in contact with the cleaning fluid) and shorten the service life. On the other hand, due to the high sound intensity.
会在钢板表面附近产生大量较大的气泡,增加声传播损失,在远离换能器的地方削弱清洗作用。一般选用功率强度每平方厘米低于1.5瓦为宜(按粘有换能器的钢板面积计算)。如果清洗槽较深,除槽底粘有换能器外, 在槽壁上也应考虑粘结换能器,或者只粘于槽体两边。
A large number of large bubbles will be generated near the surface of the steel plate, increasing the loss of sound propagation and weakening the cleaning effect far away from the transducer. Generally, it is appropriate to select the power strength less than 1.5 watts per square centimeter (calculated according to the area of the steel plate bonded with the transducer). If the cleaning tank is deep, in addition to the transducer stuck at the bottom of the tank, the transducer should also be bonded on the tank wall, or only on both sides of the tank.
超声波换能器(震子)与超声波清洗槽的粘贴质量对超声清洗机整机的质量影响很大。不但要粘牢,而且要求胶层均匀、不缺胶和不允许有裂缝,使超声能量最大限度地向清洗液中传输,以提高整机效率和清洗效果。目前有些清洗设备为避免换能器从清洗槽上掉下来。
The bonding quality of ultrasonic transducer (vibrator) and ultrasonic cleaning tank has a great impact on the quality of the whole ultrasonic cleaning machine. Not only shall it be firmly adhered, but also the adhesive layer shall be uniform, without glue shortage and cracks, so as to maximize the transmission of ultrasonic energy to the cleaning fluid, so as to improve the efficiency and cleaning effect of the whole machine. At present, some cleaning equipment to avoid the transducer falling from the cleaning tank.
采取螺钉加粘胶的固定方式,这种连接方式可以很好的让换能器不会掉下来。但是要注意螺钉焊接质量,假如不垂直于不锈钢板表面,则胶层不均匀,甚至有裂痕或缺胶,能量传输会削弱;另一方面.如果焊接不好也会影响不锈钢表面的平整,导致加速空化腐蚀,缩短使用寿命,所以焊接质量非常重要。
Adopt the fixing method of screw and glue, which can well prevent the transducer from falling down. However, pay attention to the screw welding quality. If it is not perpendicular to the surface of stainless steel plate, the adhesive layer is uneven, even cracks or lack of adhesive, and the energy transmission will be weakened; On the other hand, poor welding will also affect the flatness of stainless steel surface, accelerate cavitation corrosion and shorten service life, so welding quality is very important.
判断粘贴质量的方法之一,是在超声波清洗槽装水并开机工作一段时间后,测量超声波换能器的温升。如果在众多的换能器中某个换能器温升特别快,则表明该换能器可能粘结不好.因为此时声辐射不好,电能量大部分消耗在换能器上而发热。另一个方法是在小信号条件下逐个测量 换能器的电阻抗大小来判别粘结质量。
One of the methods to judge the sticking quality is to measure the temperature rise of the ultrasonic transducer after the ultrasonic cleaning tank is filled with water and started up for a period of time. If the temperature rise of one of the many transducers is particularly fast, it indicates that the transducer may not be bonded well. At this time, because the sound radiation is not good, most of the electrical energy is consumed on the transducer and generates heat. Another method is to measure the impedance of transducers one by one under the condition of small signal to judge the bonding quality.
目前在超声波清洗机的性能方面还存在一些模糊的认识:认为功率越大,换能器数目越多.其性能越好,价值越高,甚至以此论价.这种认识是不全面的. 如上述,超声波换能器布得过密,功率密度过大,不但清洗效果不好,而且槽底易空化腐蚀.
工业超声波清洗机
At present, there are still some vague understandings about the performance of ultrasonic cleaning machine: the greater the power, the more the number of transducers. The better the performance, the higher the value, and even the price. This understanding is not comprehensive. For example, if the ultrasonic transducers are densely distributed and the power density is too high, not only the cleaning effect is not good, but also the tank bottom is prone to cavitation and corrosion
另一方面, 目前超声波清洗机商品所标的功率大多是声功率而不是电功率,如果所标是指消耗工频功率,则超声波清洗机质量的优劣应该由效率来判断。如果效率低,在同样清洗效果时则耗电大,反而增加了用户的费用。超声清洗机的效率包括两部分.
On the other hand, at present, the target power of ultrasonic cleaning machine is mostly acoustic power rather than electrical power. If the target refers to the consumption of power frequency power, the quality of ultrasonic cleaning machine should be judged by efficiency. If the efficiency is low, the power consumption will be high when the cleaning effect is the same, but the cost of users will be increased. The efficiency of ultrasonic cleaning machine includes two parts
一是超声频电源的效率.即输入换能器的 高频电功率与消耗工频电功率之百分比;另一部分是电声转换效率,即进入清洗液中的声功率与输入换能器的电功率之百分比.目前我国在工业生产中还没有一种简便的方法和设备来测量电声转换效率。各厂家所标的超声波清洗机的功率是含糊不清的,亟需有行业的统一标准.
One is the efficiency of ultrasonic frequency power supply, that is, the percentage of high-frequency electric power of input transducer and power frequency electric power consumed; The other part is the electroacoustic conversion efficiency, that is, the percentage of the acoustic power entering the cleaning solution and the electrical power of the input transducer. At present, there is no simple method and equipment to measure the electroacoustic conversion efficiency in China's industrial production. The power of ultrasonic cleaning machine marked by various manufacturers is ambiguous, and there is an urgent need for industry unified standards
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