Method of and system for controlling stress produced in steam tu

Details Method of and system for controlling stress produced in steam tu Method of and system for controlling stress produced in steam tu

1979-05-08

1981-12-01

Coe, Philip R.

Rotary kinetic fluid motors or pumps

Method of operation

415 17, 415 47, F01K 1302, F01D 2114, F01D 1700, F01D 1900

Patent

active

043033695

ABSTRACT:
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.

REFERENCES:
patent: 3588265 (1971-06-01), Berry
patent: 3891344 (1975-06-01), Braytenbah
patent: 3928972 (1975-12-01), Osborne
patent: 4091450 (1978-05-01), Bloch et al.
patent: 4173869 (1979-11-01), Martin, Jr. et al.

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