Method and apparatus determining turbine stress

Details Method and apparatus determining turbine stress Method and apparatus determining turbine stress

1999-05-03

2000-06-06

Noori, Max

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Specified electrical sensor or system

73116, 342492, 415 15, G01B 716

Patent

active

060704713

ABSTRACT:
A method and apparatus for determining turbine rotor stresses in real time enables increased operation efficiency and more accurate stress determinations. The system calculates rotor bore and surface temperatures based on the time response of the rotor. The rotor surface temperature is measured using a sensor such as a thermocouple, and the measured rotor surface temperature is used to calculate rotor bore temperature and rotor average temperature based on time constants determined as a function of rotor geometry and material. The rotor surface thermal stress and the rotor bore thermal stress can be determined based on the measured and calculated temperatures.

REFERENCES:
patent: 3928972 (1975-12-01), Osborne
patent: 4029951 (1977-06-01), Berry et al.
patent: 4181840 (1980-01-01), Osborne
patent: 4303369 (1981-12-01), Hisano et al.
patent: 4589255 (1986-05-01), Martens et al.
patent: 5900555 (1999-05-01), Westphal et al.

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