| As the key component of the fuel supply system of the aeroengine,the core function of the fuel pressure regulator is to regulate the pressure of the fuel supply system of the engine.To some extent,it can be said that the performance of fuel pressure regulator directly determines the performance of aeroengine.In principle,the servo screw structure can not only overcome the poor anti pollution performance of nozzle flapper valve,but also overcome the defect of large leakage of jet pipe servo valve at zero position.It has the advantages of simple structure,high power weight ratio,light weight and easy to realize insertion.It is very suitable for the use of integrated and lightweight hydraulic system,and has great use value in the field of aerospace.In this paper,the technology of 2D servo valve is applied to the fuel oil pressure regulator,and a plug-in 2D electric feedback fuel oil pressure regulator is designed and studied:(1)The development history,research status,existing application scenarios and future development trend of fuel pressure regulator and two-dimensional(2D)servo valve are analyzed and summarized.(2)This paper describes and analyzes the working principle and specific structure of the plug-in two-dimensional electric feedback fuel pressure regulator,and analyzes and calculates the structure model according to the characteristics of the scheme proposed in this paper.Determine the structure of torque motor and the selection of displacement sensor.(3)Based on MATLAB and ANSYS Workbench,the simulation and analysis of key components and important structures in plug-in two-dimensional(2D)electric feedback fuel pressure regulator are carried out.(4)The mathematical model of the plug-in two-dimensional(2D)electric feedback fuel pressure regulator is established.The necessary linearization of the model is carried out.The transfer function of the model is deduced and its relevant characteristics are analyzed.(5)The simulation model of plug-in two-dimensional(2D)electric feedback fuel pressure regulator is established by AMESim platform,and then the dynamic characteristics of the fuel pressure regulator are analyzed.It is concluded that the pressure output signal of the model can well follow and respond to the input signal,and the simulation results show that the pressure output step response time is between 3 ms and 6 ms The feasibility of the design is further verified by MS.(6)The experimental prototype is manufactured and the corresponding experimental platform is designed.The relevant characteristics of the prototype are studied.The total weight of the experimental prototype is 1.97 kg,the error of the output oil pressure signal is within 2%,the hysteresis of the two-dimensional valve core response curve is 1.7%,the linearity is 4%,the frequency width of the experimental prototype is 160 Hz,and the leakage speed is 30 ml / min,The pressure holding and withstand performance is good,and the experimental results can meet the design requirements. |
PDF Full Text Request