航空发动机碰摩故障在线监测与诊断研究  

Study of on-line monitoring and diagnosis of aero-engine rubbing fault

作　　者：刘鹏鹏[1] 左洪福[1] 付宇[1] 文振华[2] 白芳[1] 

机构地区：[1]南京航空航天大学民航学院,南京210016 [2]郑州航空工业管理学院机电工程学院,郑州450015

出　　处：《仪器仪表学报》2013年第7期1603-1608,共6页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金与中国民航联合资助基金重点项目(60939003);江苏省普通高校研究生科研创新计划(CXLX12_0164);国家自然科学基金(51105344)资助项目

摘　　要：航空发动机碰摩故障是一类常见的发动机气路故障,通过研究航空发动机压气机叶片-机匣碰摩故障特点、故障产物性质、静电感应原理和碰摩颗粒荷电机理,提出了一种基于静电感应技术在线监测航空发动机碰摩故障的方法。在航空发动机碰摩故障监测原理的基础上,自行设计制造了航空发动机压气机碰摩故障模拟实验平台并开展了航空发动机压气机碰摩故障模拟实验研究。利用该平台验证了静电感应技术监测碰摩故障的可行性,通过提取模拟故障静电信号的时域、频域特征,揭示了碰摩故障静电信号特征。研究表明电压信号均方根值及碰摩频率频谱幅值、电荷信号活动率水平及事件率可以作为诊断碰摩故障的特征参数。Aero-engine rubbing fault is a kind of common faults in the gas path of aero-engine. Through studying the fault characteristics of the robbing fault between the compressor blades and casing,the property of the fault products,the electrostatic induction principle and the charging mechanism of the particles generated from rubbing fault, an on-line robbing fault monitoring method of aero-engine based on electrostatic induction technique is proposed. Based on the monitoring principle of aero-engine robbing fault,a compressor robbing fault simulating experiment platform for aero-engine was designed and manufactured ;and the simulating experiment study of compressor robbing fault for aero-engine was conducted. Using this platform ,the feasibility of monitoring the rubbing fault with electrostatic induction technique is verified. Through extracting the characteristics of the simulated rubbing fault electrostatic signals in time domain and frequency domain, the electrostatic signal features of the robbing fault are revealed and the periodicity of robbing fault is verified. The study shows that the root mean square value of the voltage signal ,the frequency spectral amplitude of the rubbing frequency,the activity level and event rate of the charge signal can be used as the characteristic parameters for rubbing fault diagnosis.

关 键 词：航空发动机 压气机 静电感应 碰摩故障 模拟实验 

分 类 号：V231.25[航空宇航科学与技术—航空宇航推进理论与工程]