透平机械动叶片的振动状态非接触测量分析

Non-contact measurement analysis on turbo-machinery bucket vibration

现代工业和生活中广泛使用的透平机械正向着大功率,高负载的趋势发展。透平机械中的叶片长度和叶尖线速度都不断提高。准确地测量叶片实际振动的频率和振幅已成为透平机械的一个重要研究方向。以间断相位法为理论基础的非接触式测量方法具有很强的实际应用价值。利用间断相位法可以得到叶片低阶振动的许多特性,对叶片的设计和安全运行具有很重要的意义。

Turbines' power and load improved rapidly.The length and speed of blade became longer and faster accordingly.Exact measurement for the actual vibration frequency of the blade was the focus.The discontinuous phase method is a non-contact measurement and can apply easily.The discontinuous phase method mainly gets the low order vibration characters.The non-contact measurement method does not influence the operation of turbine machines,so the study of non-contact measurement method is very important for the design and work of blades.