Synthesized Synchronous Sampling Technique for Bearing Damage Detection Preprint
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
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Differential bearing between the low-pressure turbine LPT shaft and high-pressure turbine HPT shaft is one of the most vulnerable parts in a turbo machinery engine. Yet, it is one of the most difficult parts to detect the damage signatures, because the signal to noise ratio at the regular sensor locations is usually low. In addition, the speed variations in both the LPT and the HPT can further deteriorate the damage signature extracted by the conventional analysis. In this paper, we developed a synthesized synchronous sampling technique to enhance the differential bearing damage signature. With this technique, together with the conventional acceleration enveloping technique, we are able to detect differential bearing damage at much earlier stage, thus provide early warning of the machinery health conditions.
- Machinery and Tools
- Safety Engineering
- Jet and Gas Turbine Engines