Fluid-structure Interaction Analysis Of Nozzle Flapper Assembly And Temperature Field Analysis Of The Main Valve Of Electro-hydraulic Servo Valve

Electro-hydraulic servo valve is one of the key element of the electro-hydraulic servocontrol system,It affects the performance of electro-hydraulic servo system directly, Servovalve with a small body, high power amplifier,fast response and so on. At present, doublenozzle flapper force feedback two-stage servo valve is representative, the first stage ofwhich is double nozzle flapper valve, its performance has an important influence on theperformance of the electro-hydraulic servo valve. In this paper, a method using afluid-structure interaction and thermal solid coupling method to analyze the flow field andtemperature field of double nozzle flapper servo valve.The main analysis of the flow field is the pre-stage maked up by nozzle flapper valveand the armature baffle components.Through analyzing of its dynamic flow field,we drawflow rate and pressure changes of a fixed orifice,nozzle, back at the oil port,powerloss,and,the displacement,the forces of armature baffle assembly and spoolvalve,analyzing and comparing its results,we provide some guidance for the selected servovalve structure parameters.And the text selects three valves,compare and analyze thechange of their velocity,pressure,and power loss,and the displacement,the forces ofarmature baffle assembly and spool valve.it can provide guidance for the choice ofdifferent structural parameter,while reducing some experimental and cost savings.For the analysis of temperature field,the text mainly study the deformation of thespool valve and cover Through analyzing the deformation of the different parts,the textsum up the law of spool valve and cover of the deformation,providing some guidance forassembly and processing of the spool valve and cover.The text also analyze the effects ofthe flow field by temperature,and analyze the change of flow rate and pressure,flowcoefficient, the power loss.obtaining the affect of the valve by work environment.Finally,,through the experimental verification,we obtain the effect.the text provides someguidance for future research of servo valve...