Xie Zhijiang  

( State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044)

Liu Jun

(Machine Manufacture Branch, Panzhihua Steel Co. Ltd., Panzhihua 617063)

Tang Yike  Wang Xue

( State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044)

Abstract: The of the blade faults diagnostic method is presented which be named the blade-to-blade dynamic space diagnostic method. It uses the pulse sensors amounted on the shell to non-contact measure the pulse signal generated by the rotating blade when it pass before the sensors. Through calculating the relative time intervals or absolute time intervals between two blades, blades vibration and fault information can be gained. At the same time, the can ception of rigid blade and flexible blade are presented. The influence made by blade vibration on the dynamic space is analysed. At last, the principle of experimental research and process of this way are discussed. The experiments and practice application have revealed that the diagnostic method is correct and effective.

Key words: Turbo machinery  Blade-to-blade dynamic space   Rigid blade  Flexible blade   Fault diagnosis

CLC No: TP206  TN911

国家“十五”科技攻关资助项目(2001BA957C). Received 20030607, received in revised form 20040310