光学超声波清洗机工作时,超声波会在介质中传播,由于超声波与介质的相互作用,使介质发生物理和或化学的变化,从而产生一系列力学、热、电磁和化学的超声效应。质量高的光学超声波清洗机一般都会包括以下几种效应:
When the optical ultrasonic cleaning machine is working, the ultrasonic wave will propagate in the medium. Due to the interaction between the ultrasonic wave and the medium, the physical and chemical changes of the medium will occur, resulting in a series of mechanical, thermal, electromagnetic and chemical ultrasonic effects. High quality optical ultrasonic cleaning machine generally includes the following effects:
一、机械效应
1、 Mechanical effect
光学超声波清洗机的机械作用可促成液体的乳化、凝胶的液化和固体的分散。当超声波流体介质中形成驻波时,悬浮在流体中的微小颗粒因受机械力的作用而凝聚在波节处,在空间形成周期性的堆积。超声波在压电材料和磁致伸缩材料中传播时,由于超声波的机械作用而引起感生电 机 化和感生磁化。
The mechanical action of the optical ultrasonic cleaner can promote the emulsification of the liquid, the liquefaction of the gel and the dispersion of the solid. When standing wave is formed in ultrasonic fluid medium, micro particles suspended in the fluid condense at the wave node due to mechanical force, forming periodic accumulation in space. When ultrasonic wave propagates in piezoelectric materials and magnetostrictive materials, induced electromotion and induced magnetization are caused by ultrasonic mechanical action.
二、空化作用
2、 Cavitation
光学超声波清洗机的超声波作用于液体时可产生大量小气泡。一个原因是液体内局部出现拉应力而形成负压,压强的降低使原来溶于液体的气体过饱和,而从液体逸出,成为小气泡。另一原因是强大的拉应力把液体“撕开”成一空洞,称为空化。因空化作用形成的小气泡会随周围介质的振动而不断运动、长大或突然破灭,破灭时周围液体突然冲入气泡而产生高温、高压,同时产生激波。
When ultrasonic wave of optical ultrasonic cleaning machine acts on liquid, a large number of small bubbles can be produced. One of the reasons is that the local tensile stress in the liquid forms negative pressure. The decrease of the pressure makes the gas dissolved in the liquid supersaturate, and then escape from the liquid and become small bubbles. Another reason is that the strong tensile stress "tears" the liquid into a cavity, which is called cavitation. The small bubbles formed by cavitation will continuously move, grow or burst with the vibration of the surrounding medium. When the bubbles burst, the surrounding liquid suddenly rushes into the bubbles and produces high temperature, high pressure and shock wave.
三、化学效应
3、 Chemical effect
光学超声波清洗机的超声波的作用可促使发生或加速某些化学反应。例如纯的蒸馏水经超声处理后产生过氧化氢;溶有氮气的水经超声处理后产生亚硝酸;染料的水溶液经超声处理后会变色或退色,这些现象的发生总与空化作用相伴随。超声波还可加速许多化学物质的水解、分解和聚合过程,超声波对光化学和电化学过程也有明显影响。
The ultrasonic effect of optical ultrasonic cleaning machine can promote or accelerate some chemical reactions. For example, pure distilled water produces hydrogen peroxide after ultrasonic treatment; water dissolved in nitrogen produces nitrite after ultrasonic treatment; aqueous solution of dye changes color or fade after ultrasonic treatment, which is always accompanied by cavitation. Ultrasound can also accelerate the hydrolysis, decomposition and polymerization of many chemicals, and also has obvious effects on photochemical and electrochemical processes.
以上就是光学超声波清洗机的三种效应,其中主要就是利用超声空化效应。畅销全球的光学超声波清洗机由超声波电源发出的高频振荡信号,经换能器转变为机械振动传入到清洗介质中,以连续不断的方式产生辐射状直线传播的超声波束,强烈冲刷零件的表面,保括孔隙、夹缝等部位,达到清洁效果。
The above are the three effects of optical ultrasonic cleaning machine, which mainly uses ultrasonic cavitation effect. High frequency oscillation signal from ultrasonic power supply is transformed into mechanical vibration and transmitted into cleaning medium by transducer, which generates radiated straight-line ultrasonic beam in a continuous way, which strongly washes the surface of parts, covers the pores and cracks, and achieves the cleaning effect.