G - Physics – 01 – N
Patent
G - Physics
01
N
354/23
G01N 3/00 (2006.01) G01N 3/18 (2006.01) G01N 3/60 (2006.01) G01N 17/00 (2006.01) G07C 3/00 (2006.01)
Patent
CA 1098623
17TU 2603 ABSTRACT OF THE DISCLOSURE The useful life of a turbomachine part is affected by cyclic stresses which occur in the turbo- machine part as a result of heating and cooling the turbomachine part. Each thermal cycle is comprised of a maximum heating stress and a maximum cooling stress which may occur during turbomachine start-up, load changes, shut-downs, or boiler excursions. The maximum heating stress and the maximum cooling stress for each cycle may be combined to define a stress range. The actual strees range for each cycle is compared with a calculated stress range curve for the turbomachine part to determine the amount of life expended during the cycle for the turbomachine part. This value may be expressed as a percent of life expended for the cycle. The life expended for each cycle is accumulated to provide an output indicative of the total percent life expended for the turbomachine part according to its operating history.
289285
Gonyea David C.
Murphy Bartholomew D.
Company General Electric
Eckersley Raymond A.
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