非接触式高速旋转叶片振动测量新技术的研究

基于叶尖定时原理开发了一套旋转叶片振动监测系统,该系统主要由光纤传感、数据采集、振动分析三个部分组成.光纤传感的核心是叶尖定时传感器和光电转换模块的设计,数据采集实现对转换后的脉冲数据进行高速采集、预处理和与计算机之间的高速通信,振动分析则由计算机软件进行实时处理并显示分析结果.整套系统在现场某大型压气机上进行了原理性验证,同时在高速模拟转子上通过了实时性验证,分析得到的结果与应变片监测的数据完全吻合,保证了整套系统最终应用于压气机叶片振动的在线实时监测.

Research on A Technique of Non-contact Vibration Measurement for High-speed Rotating Blades

A vibration monitoring system for rotating blade based on tip-timing is developed. And this system consists of three parts, which are optical-fiber sensing, data acquisition and vibration analyzing. The design of tip-timing sensors and photoelectric converter are the important part of optical-fiber sensing. High-speed collection, preprocessing and communication with computer for transformed pulse data are realized in data acquisition part. In addition the real-time data processing and analytical result display are completed in vibration analyzing part. As a result the proving trial of principle of this system has been completed on some type of compressor, as well as real-time one has been fulfilled on high-speed stimulated rotor. The completed coherence of analyzed result and collected data by strain gauge ensured that the successful appliance in real-time measurement for compressor blades.