Have you ever wondered that an ordinary stone, when combined with electricity, can transform into a master of precise fluid control? This isn't science fiction; it's the fascinating world behind piezoelectric valves. In high - end manufacturing fields such as semiconductor packaging and consumer precision electronics, piezoelectric valves play an indispensable role. They can manipulate fluids with micron - level precision, ensuring that even the tiniest operations are carried out accurately. Today, let's step into the world of piezoelectric valves and explore their working principles.
Imagine there is a special "stone" (piezoelectric material). When you apply an electric voltage to it, it instantly "deforms," either elongating or shortening. This magical property is known as the piezoelectric effect. Piezoelectric valves cleverly utilize this effect to achieve fluid control.
Inside a piezoelectric valve, there is a crucial component - the piezoelectric ceramic plate. When an electric current passes through the piezoelectric ceramic plate, it deforms to varying degrees depending on the magnitude and direction of the current. It's like a flexible dancer, moving to the rhythm of the "music" (electric current). When the piezoelectric ceramic plate deforms, it drives the valve stem connected to it. The movement of the valve stem acts like a commander, precisely controlling the opening and closing degree of the valve, thus achieving precise regulation of fluid flow rate and velocity.
For example, during the semiconductor chip packaging process, an extremely small amount of glue needs to be applied to specific positions on the chip to ensure its performance and stability. This is where the piezoelectric valve shines. By precisely controlling the magnitude of the electric current, the piezoelectric valve can extrude the glue in extremely small quantities and with high precision, with errors controllable within just a few microns. Such precision is far beyond the reach of traditional valves.
Another example is in consumer electronics manufacturing, such as the production of mobile phone camera modules, where precise dispensing operations need to be carried out in a tiny space. The piezoelectric valve can quickly respond to control signals, complete the dispensing action in an extremely short time, and the amount of glue dispensed each time remains highly consistent, greatly improving production efficiency and product quality.
Compared with other types of valves, piezoelectric valves have distinct advantages. They have an extremely fast response speed, capable of opening and closing the valve within milliseconds; they offer high precision, enabling precise control of minute flows; and they have a long lifespan and high reliability, able to operate stably in harsh working environments. These advantages make piezoelectric valves stand out in the high - end manufacturing field and become the top choice for many enterprises.
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