喷嘴性能试验器液压系统设计与仿真

航空发动机喷嘴作为整个发动机的重要部件,其性能关乎整个发动机的性能与使用寿命。为满足企业对喷嘴检修设备的需求,达到喷嘴检修时喷射、雾化的前提条件,设计了喷嘴性能试验器的液压系统,并着重对其压力控制系统进行分析;使用AMESim软件搭建伺服阀及压力控制系统的模型。对模型仿真分析的结果表明,在该类小流量、负载敏感的液压系统中,加入辅助喷嘴、蓄能器能提高压力稳态的控制精度。根据试验器压力控制系统的测试结果,使用积分分离PID校正后的液压系统,其压力控制精度在±0.01 MPa范围内,满足研制指标需求。

Design and Simulation of Nozzle Performance Tester Hydraulic System

The performance of the aeroengine nozzle, an integral part of the entire engine, has a bearing on the performance and service life of the engine as a whole. In order to meet the demand of enterprises for nozzle maintenance equipment and achieve the prerequisite conditions of injection and atomization during nozzle maintenance. The hydraulic system of the tester is designed, and pressure control system is analyzed emphatically. Models of the servo valve and the pressure control system are built with AMESim. The simulation results show that the introduction of both auxiliary nozzle and accumulator into such low flow and load sensitive hydraulic systems can enhance the precision of pressure steady-state control. According to the test results of the pressure control system of the tester, the pressure control accuracy of the hydraulic system after the integral separation PID correction is within the range of ±0.01 MPa, which meets the requirements of the research and development indicators.