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 withrotating machinery faults. These stress waves are short-termtransient 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-passfilters; capturing magnitude through recording peak values overrepeated continuous small time increments (PeakVuemethodology); and identifying periodicity through spectral analysis.PeakVue technology is shown to significantly improve an analyst'scapability to detect and classify severity of bearing and gearingdefects commonly experienced in the steel industry.