Method and an apparatus for starting a turbine having a shrinkag

Details Method and an apparatus for starting a turbine having a shrinkag Method and an apparatus for starting a turbine having a shrinkag

1985-01-23

1987-08-25

Ostrager, Allen M.

Power plants

Motive fluid energized by externally applied heat

Process of power production or system operation

60657, F01K 1302

Patent

active

046883851

ABSTRACT:
A method of starting a turbine having a shrinkage-fitted rotor provided by shrinkage-fitting discs onto a shaft comprises the steps of raising the temperature of the rotor above a predetermined temperature determined from a physical value of the material constituting the rotor and, thereafter, raising the rotational speed of the turbine from the turning speed to the rated speed, whereby the centrifugal stress on raising the speed acts on the discs in a state wherein the value of fracture toughness of the discs fitted on to the shaft has increased.

REFERENCES:
patent: 4173869 (1979-11-01), Martin, Jr.
patent: 4204258 (1980-05-01), Zitelli et al.

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