偏转板所受射流液流力的计算OA

Calculation of the jet flow force on the deflector plate is fundamental for torque motor design,determination of the static operating point of the armature assembly and performance analysis of the servo valve.To address the difficulty in theoretical modeling and analysis of the jet flow force on the deflector plate,we develop a three-dimensional steady-state magneto-solid-fluid multi-physics coupling simulation model for the deflector jet valve.Comparison between simulation results and experimental tests shows a maximum deviation of 8.9%for armature displacement and 9.6%for pre-stage blocking pressure characteristics,which validates the model.Based on this model,we further analyze the influence of control current and inlet pressure on output torque of armature,displacement and baffle jet force.Results indicate that the jet flow force reduces armature output torque of armature and displacement.A larger control current and higher inlet pressure lead to a more significant reduction in output torque of armature and displacement.Using simulation data at 4 and 6 MPa,we derive a binary functional relationship between the flow force and inlet pressure and control current,with a goodness of fit R2=0.9964.We use this fitted relationship to predict the flow force at inlet pressures of 2 and 8 MPa.Compared with simulation results,the maximum deviations are 7.7%and 2.4%,respectively.This work lays a foundation for subsequent analytical analysis of static and dynamic characteristics of the servo valve.