The Working Principle Of Piezoelectric Valve

As an important component in the hydraulic and pneumatic system, the valve realizes the control of fluid pressure, flow and direction, and directly affects the working process and performance of the hydraulic and pneumatic system. With the continuous expansion of hydraulic pneumatic technology from traditional application fields to new technical fields such as space, information and biomedicine, higher requirements are put forward for the size, control accuracy, response speed and reliability of the hydraulic pneumatic system. It is difficult for traditional control valves to meet such requirements. Therefore, valve innovation has become a research and development hotspot for scientific research institutions and enterprises at home and abroad.

Piezoelectric valve is a new type of control valve that uses the piezoelectric effect of piezoelectric material to realize valve action. Compared with traditional valves, it has the advantages of high precision, fast response, low power consumption, long life, compact structure, environmental protection and energy saving. It has been applied in some hydraulic or pneumatic systems that require precise control, and has great application value and application potential. This article will analyze the working principle of piezoelectric valve and its research and application status at home and abroad, and prospect the development trend of piezoelectric valve.

Working principle of piezoelectric valve

Piezoelectric valves first appeared in the SPIARTPS intelligent valve positioner launched by SIEMENS in the 1990s. It utilizes the inverse piezoelectric effect of piezoelectric crystals and has the characteristics of high shock resistance, high reliability, low power consumption, and energy saving in practical applications. It can fully meet the requirements of intelligent valve positioners for electrical-mechanical conversion units.