Mechanism And Experimental Research On Circular Piezoelectric Actuator For Micro-valve

According to micro valve actuator of the theoretical research and application status, in order to predict performance of circular piezoelectric and Actuator for Micro-valve, this paper,the adhesive layer as a separate layer, combining layers of piezoelectric ceramic layer and the substrate is resolved modeling, deformation equations are given and effective electromechanical coupling coefficient of the analytical expression; by changing the piezoelectric drive round the geometric parameters of the method, the simulation analysis to identify the circular drive piezoelectric properties and deformation geometric parameters. And as for a circular piezoelectric micro drive system, active valve in fluid performance testing, and further obtained a circular piezoelectric single chip in the fluid system Zhonggu the coupling fluid, the geometric parameters and output performance relationship. The main contents are as follows:1. the piezoelectric actuator Theory and Application ResearchDrive mode of mirco-valve, the drive way of the piezo-driven than the traditional, with a high frequency response, low power consumption and free from electromagnetic interference, and other prominent advantages, therefore, piezoelectric actuator in the tech, Precision, Cutting-edge technology, micro-areas have applications. Piezoelectric driven on the drive to replace the traditional research-driven approach has been the focus area of research. On the theory of piezoelectric actuators, there are three methods, namely, is the analytical method, numerical method and the equivalent circuit method, they have advantages and disadvantages, is still widely used analytical method for modeling operations.2. piezoelectric basic theory and characteristics of piezoelectric driveBased clear meaning of piezoelectric on the basic parameters, using the classical Kirchhoff plate theory on the basic assumptions, the adhesive layer as a separate layer, set up under the conditions of clamped circular piezoelectric single-chip Mathematics model representation; re-use piezoelectric constitutive equation on the circle of peace Andante established deflection of piezoelectric single-chip differential equations; two simultaneous obtained under clamped circular deflection of piezoelectric single-chip equation. And the reference piezoelectric energy equation, obtained the effective single-chip piezoelectric electromechanical coupling coefficient theory of expression, and thus clear the micro piezoelectric valve with a circular drive between the geometric parameters and output performance.3. the tiny piezoelectric valve drive performance simulation analysisValve through the establishment of small round single-chip piezoelectric finite element model, respectively, a circular single-chip piezoelectric substrate, the radius of piezoelectric ceramics, thickness and radius ratio and thickness ratio, driving voltage, circular piezoelectric actuator pressure on both sides of the variable valve of small round single-chip piezoelectric a numerical simulation, the simulation result of the small circular piezoelectric actuator valve in the drive voltage, internal and external pressure difference, the circular pressure Power chip drives piezoelectric circular geometric parameters and characteristics of the relationship between the driver output.4.circular drive piezoelectric wafer test system in the study of fluidModel based on active control valves and the establishment of a testing device, combined with knowledge of the circular piezoelectric fluid drives the static and dynamic characteristics of the test are given micro valve with piezoelectric drive round in a fluid environment, the performance of the output conclusions for future research can draw on the work of reference.