航空发动机气路碎屑静电监测传感器设计与试验

摘要

设计了一种航空发动机气路碎屑静电监测传感器.在阐述碎屑颗粒荷电机理的基础上,对该传感器感应原理进行了研究,然后在静电感应原理的基础上进行了棒状静电传感器和环状静电传感器的结构设计,为防止绝缘套管的过压崩坏,对探极与套管之间的间隙配合进行了详细计算,最后利用实验验证了所设计的静电传感器的有效性,实验结果表明:环状静电传感器可以得到比棒状静电传感器更高的检测信号输出信噪比.%An electrostatic monitoring sensor for aircraft engine gas path debris is designed.The mechanism of electric charges of debris and the principle of electrostatic induction of sensor are researched firstly.Then,the structures of rod electrostatic monitoring sensor and ring electrostatic monitoring sensor are designed based on the principle of electrostatic induction.To avoid the insulated sleeve is broken because of the excessive pressure,the clearance fit between probe and insulated sleeve is calculated in detail.Finally,the effectiveness of electrostatic monitoring sensor is verified by experiments,and the results also show that the ring electrostatic monitoring sensor has a higher signal to noise ratio than rod electrostatic monitoring sensor.