Method and device for monitoring vibration of turbine rotary part


PURPOSE: To obtain a long-life device where a blade material and an installation location are not limited by providing a processor for generating a signal through a sensor according to the motion a radioactive nuclide provided at a turbine blade and for extracting vibration information according to the signal. CONSTITUTION: Radioactive nuclide 20 is produced at a tip part 18 of a turbine blade 14 without any shroud by ion beams from an accelerator, and gamma rays that are not harmful to people are emitted from it and are sensed by a sensor 16 provided at a seal 30. When the nuclide 20 approaches the sensor 16, gamma rays increase. When it moves away from the sensor 16, gamma rays decrease. A signal corresponding to the motion of the nuclide 20 is generated from a sensor by the repetition. The signal is inputted to a processor 26, thus extracting information regarding vibration from the input signal and hence obtaining a monitor device for long-life vibration where it operates regardless of whether the blade is made of magnetic or nonmagnetic material and the mounting position cannot be limited particularly. COPYRIGHT: (C)1990,JPO




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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    JP-2001215150-AAugust 10, 2001Luk Lamellen & Kupplungsbau Gmbh, ルーク ラメレン ウント クツプルングスバウ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング可変的なパラメータの振動を識別するための方法
    JP-4518449-B2August 04, 2010ルーク ラメレン ウント クツプルングスバウ ベタイリグングス コマンディートゲゼルシャフトLuK Lamellen und Kupplungsbau Beteiligungs KG可変的なパラメータの振動を識別するための方法
    US-7707889-B2May 04, 2010Siemens AktiengesellschaftMethod and apparatus for determination of oscillations on a rotating blade disc of a turbine