Capture and analysis of stress waves provides significant improvement in condition monitoring of critical rotating machinery

摘要

Stress waves accompany metal to metal impacting, fatigue cracking, abrasive wear and other defects encountered with rotating machinery faults. These stress waves are short-term transient events. The important features to capture for faultdiagnostics are the magnitude of the events and rate of occurrence.Examples are cited where stress waves are determined by: separation from normal vibrations through the use of high-pass filters; capturing magnitude through recording peak values over repeated continuous small time increments (PeakVue methodology); andidentifying periodicity through spectral analysis.PeakVue technology is shown to significantly improve an analyst's capability to detect and classify severity of bearing and gearing defects commonly experienced in the steel industry.