射流管电液伺服阀在发动机温度控制中的应用

Application of Jet-Pipe Electrohydraulic Servovalve to Temperature Control of Aeroengine

燃气温度是直接影响发动机性能及寿命的重要参数,某型航空发动机的温度控制系统原采用直动式调节阀对燃气温度进行限制,该阀精度较低,导致系统性能不理想.为解决这一问题,提出了一种以射流管电液伺服阀替换原有调节阀温控系统的改进方案.试验和试车结果表明,射流管电液伺服阀控制精度高、滞环小,低压状态工作性能稳定;应用该阀的方案能够显著提高系统的性能,满足发动机的使用要求,具有较高的可行性.

Gas temperature is crucial to aeroengine, since it directly affects the performance and service life of the latter. For instance, a direct regulating valve was once used in the temperature control system of a certain aeroengine to constrain gas temperature, which resulted in an unideal state of system performance due to its low precision. To mlve the problem, an improvement scheme is proposed, i.e., a jet-pipe electrohydraulic servovalve is used instead of the direct regulating valve for gas temperature control. Testing and commissioning results showed that the jet-pipe electrohydraulic servovalve has the advantages of high control precision, low hysteresis loop and high stabilization under low pressure, thus improving remarkably the system performance to satisfy the requirements of the aeroengine with high feasibility.