Development and Application of On-Line Monitor for the ZLW-1 Axis Cracks

This article mainly introduces a method that uses acoustic emission techniques to achieve on-line monitor for the shaft cracks and crack growth.According to this method,axis crack monitor is produced by acoustic emission techniques.This instrument can apply to all the pressure vessels,pipelines and rotor machines that can bear buckling load.It has the online real-time monitoring,automatic recording,printing,sound and light alarm,collecting crack information function.After a series of tests in both laboratory and field,it shows that this instrument is very versatile and possesses broad prospects of development and application.