航空发动机磨粒荷电特性研究

Aeroengine Grits Charged Characteristics Research

摘要: 大多数机械系统(航空发动机)失效期的磨粒尺寸多在20 μm~200 μm之间，在这一尺寸范围内研究颗粒的荷电特性对磨粒静电监测技术具有特殊意义。本文采用直接测量的方法获得微米级颗粒不同摩擦时间后产生的静电，实验选用颗粒的材料为金属铝粉末，平均粒径为50 μm、200 μm、3 mm。研究结果表明：铝颗粒的荷电量与振动荷电时间在一定时间范围内存在线性关系，在相同的摩擦振动时间下，颗粒的直径越大，荷电量越多。

Abstract: Abrasive particle size of most mechanical systems (aeroengine) failure issue is between 20 mi-crons to 200 microns. The study of the charge characteristics of particles in this area has special significance to the technology of abrasive electrostatic monitoring. This paper adopts direct measurement method to obtain the generated static electricity after different friction time of micron particles. The materials used in the experiment are powder of aluminum. The average particle size is 50 um, 200 um and 3 mm. The results show that there is a linear relationship between the charge of aluminum particles and the time of the vibratory load. The greater the diameter of the particle, the more the charge.