基于有限元仿真的大流量气动压电比例阀结构设计研究OA

Piezoelectric ceramics are functional materials that convert electrical energy into mechanical energy,and vice versa.Piezoelectric proportional flow valves,driven by piezoelectric bimorphs,offer advantages such as fast response,low power consumption and high precision.However,the low output force of piezoelectric bimorphs limits their application in high-flow applications.To improve the output flow rate of the piezoelectric bimorph-driven proportional valve,we use ANSYS and COMSOL software to create three-dimensional and two-dimensional axisymmetric models of the piezoelectric valve and bimorph.The flow field characteristics of the valve and the fluid-structure coupling behavior of the piezoelectric element are analyzed.The effects of inlet and outlet positions,valve opening and chamber pressure on the output flow rate are also explored.The relationship between the force at the end of the piezoelectric bimorph and the output flow rate is studied,and its performance is compared with existing piezoelectric proportional valves of the same type.The results show that the optimized parameters significantly improve the valve's output flow rate.When the valve chamber's inlet pressure reaches 0.5 MPa(with an outlet radius of 1.1 mm),the output flow rate approaches 160 L/min,while the force on the free end of the piezoelectric bimorph is only 0.9 N.It provides guidance for designing nozzle-baffle pneumatic piezoelectric proportional valves and is expected to expand their application range.