Research On Magnetostrictive Rotary Actuator For Butterfly Valve Drive In Pumping Station

Butterfly valve can accurately adjust the flow is an important guarantee for the efficient and safe operation of the pump station,but there are many shortcomings in the traditional driving mode of butterfly valve,which seriously affects the accuracy of flow regulation of butterfly valve,and affects the operation efficiency of the pump station in the actual operation process.In order to accurately adjust the flow rate,a new type of intelligent material driven rotary actuator was designed to drive the butterfly valve.The main contents of this paper are as follows:(1)The magnetostrictive effect of magnetostrictive materials is described.Through testing and comparing the performance of different magnetostrictive materials,Terfenol-D material with larger stress and larger deformation displacement is selected as the driving element material.After the material selection is completed,the relevant design of the drive element structure,drive coil structure and temperature control structure of the driver is carried out,and the theoretical model of the driver output characteristics is established on the basis of the structure design.(2)The finite element simulation software is used to optimize the initial structure size parameters with the maximum output displacement as the optimization goal,and the optimal size parameters of the driver structure are obtained through optimization calculation;and on this basis,the finite element simulation software is used to perform multiple The physical field coupling simulation analysis analyzes the stress and magnetic field distribution of the cantilever drive structure and the overall output displacement of the driver under different coil drive currents and sawtooth current signals with different coil turns.The simulation results show that the magnetic field and stress distribution of the driver are relatively uniform,and the output performance is stable,and the entire driver structure design meets the design requirements.(3)According to the structure size of the magnetostrictive rotary actuator,the parts are processed and assembled into an experimental prototype.The overall output performance of the driver under different sawtooth wave driving signals,different driving current and different current frequency excitation is tested by setting up the driver experimental test platform.The experimental results show that the higher the driving current frequency,the greater the speed.Under the excitation of 3 A,200 Hz sawtooth current signal,the maximum speed of the driver can reach 13.462 rad/min,and under the excitation of 3 A,200 Hz sawtooth current signal,the maximum speed of the driver can reach 12.934 rad/min.By comparing the calculation results,simulation results and experimental results,it can be seen that there is little difference between them.Therefore,the overall output performance of the driver meets the design requirements.This paper takes double eccentric double flange soft seal butterfly valve as an example,the magnetostrictive rotary actuator is applied to the butterfly valve of pump station,and the control system of the actuator regulating butterfly valve is designed,which can provide reference for the further application of the actuator in the water conservancy field.