F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
341/12, 342/13
F01D 21/12 (2006.01) F01D 19/02 (2006.01)
Patent
CA 1113589
ABSTRACT OF THE DISCLOSURE A stress controlling system for a rotor of a steam turbine determines thermal and rotational conditions of the rotor. Thermal and centrifugal stresses produced in the rotor during operation of the steam turbine are calculated from the thermal and rotational conditions, respectively, of the rotor. Also, brittle fracture toughness of the material of the rotor under the thermal condition determined is calculated. Operation of the steam turbine is controlled to prevent the calculated brittle fracture toughness from being exceeded by the combined stress of thermal and centrifugal stresses during operation of the steam turbine.
326683
Hisano Katsukuni
Isa Hitoshi
Sibaoka Hazime
Hitachi Ltd.
Kirby Eades Gale Baker
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