润滑油路静电传感器动态特性仿真与试验

Simulation and experiment of dynamic characteristics for oil-line electrostatic sensor

针对航空发动机润滑油路磨粒在线监测的静电传感器缺少特性参数与验证方法的问题,根据静电感应基本原理和传感器结构,提出相应的特性参数指标,利用环状探极感应模型进行仿真,并设计和搭建了静电传感器试验系统平台,通过试验对润滑油路静电传感器动态特性进行分析与验证。结果表明:所提特性参数指标可有效反映静电传感器的动态特性;长径比是环状润滑油路静电传感器的重要结构参数,传感器效率随长径比的增大而增大;传感器有效视场也随探极尺寸的增大而增大;所建平台可适用于实物静电传感器动态特性的分析与试验,且具有良好的可重复性。仿真和试验结果对润滑油路静电传感器的设计与应用具有重要的指导意义。

In order to investigate the lack of characteristic parameters and verification method of the electrostatic sensor for on-line debris monitoring in aero-engine lubricated system,the corresponding characteristic parameters were proposed according to the basic principle of electrostatic induction and the structure of sensor.Sensing model of ring probe was used for simulation,and the rig of electrostatic sensor experiment system was designed and built.Dynamic characteristics of the oil-line electrostatic sensor were analyzed and validated by experiments.Results showed that the proposed parameters can effectively reflect the dynamic characteristics of the electrostatic sensor.The ratio of length to diameter was an important structural parameter of the ring oil-line electrostatic sensor,and the sensor efficiency increased with the increasing ratio of length to diameter.The effective field of view of the sensor also increased with the increasing size of the probe.Furthermore,the experiment rig can be applied to the analysis and experiment of the dynamic characteristic of the actual sensor with good repeatability.The simulation and experimental results have important guidingsignificance for the design and application of the oil-line electrostatic sensor.