The differential bearing between the low-pressure turbine (LPT) and high-pressure turbine (HPT) shafts is one of the most vulnerable parts in a turbomachinery engine. Unfortunately, it is also one of the most difficult parts to monitor for damage existence signatures, because the signal-to-noise ratio at the normal sensor locations is extremely low. In addition, the speed variations in both the LPT and HPT can further deteriorate the damage signature extracted by conventional analysis methods. In this paper, we developed a “synthesized synchronous sampling” technique to enhance the detection of differential bearing damage signature. Combining this technique together with the conventional acceleration enveloping technique, we are able to detect differential bearing damage at a much earlier stage, thus providing early warnings of the machinery health conditions.
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July 2010
Research Papers
Synthesized Synchronous Sampling Technique for Differential Bearing Damage Detection
Huageng Luo,
Huageng Luo
GE Global Research Center
, Niskayuna, NY 12309
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Hai Qiu,
Hai Qiu
GE Global Research Center
, Niskayuna, NY 12309
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George Ghanime,
George Ghanime
GE Global Research Center
, Niskayuna, NY 12309
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Melinda Hirz,
Melinda Hirz
GE Aviation
, Evendale, OH 45215
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Geo van der Merwe
Geo van der Merwe
GE Aviation
, Evendale, OH 45215
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Huageng Luo
GE Global Research Center
, Niskayuna, NY 12309
Hai Qiu
GE Global Research Center
, Niskayuna, NY 12309
George Ghanime
GE Global Research Center
, Niskayuna, NY 12309
Melinda Hirz
GE Aviation
, Evendale, OH 45215
Geo van der Merwe
GE Aviation
, Evendale, OH 45215J. Eng. Gas Turbines Power. Jul 2010, 132(7): 072501 (8 pages)
Published Online: April 7, 2010
Article history
Received:
March 18, 2009
Revised:
July 30, 2009
Online:
April 7, 2010
Published:
April 7, 2010
Citation
Luo, H., Qiu, H., Ghanime, G., Hirz, M., and van der Merwe, G. (April 7, 2010). "Synthesized Synchronous Sampling Technique for Differential Bearing Damage Detection." ASME. J. Eng. Gas Turbines Power. July 2010; 132(7): 072501. https://doi.org/10.1115/1.4000092
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