Apparatus and method for predicting failures of spinning disks in turbo-machinery
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United States of America Patent
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Aug 31, 2004
Grant Date -
Mar 27, 2003
app pub date -
Oct 25, 2002
filing date -
Aug 2, 1999
priority date (Note) -
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Abstract
An apparatus is described for detecting the early signs of cycle-induced fatigue and thereby predicting failure of the rotating disk in turbo-machinery. It identifies change in shape of the entire disk in radial, tangential and axial directions. It examines these deformations as a function of rotational velocity and compares them to a data base of deformations due to cracks in the rotor. Blade-tip measurements are processed through specialized algorithms to detect such asymmetry during operation, providing a real-time, non-destructive method of prediction. The sensors can be housed within the machinery case, and are capable of operating in harsh environments while maintaining adequate stand-off distance, making the entire apparatus robust enough for conditions in high-speed turbo-machinery.
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