Steam turbine with thermal stress reduction system

Details Steam turbine with thermal stress reduction system Steam turbine with thermal stress reduction system

1995-03-02

1996-03-12

Look, Edward K.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

With runner shaft of specific shape or material

415115, 415177, 60646, 60656, F01D 1900

Patent

active

054981310

ABSTRACT:
A steam turbine has a rotor-stress reducing steam system coupled to the rotor bore of the rotor shaft so as to introduce steam in the rotor bore. The rotor-stress reducing steam system has a radial steam supply device in which steam is introduced via radial channels through the rotor core, or alternatively, an axial steam supply device has a steam supply tube coaxially disposed within the rotor bore. The surface of the rotor core that is the boundary of the rotor bore typically has rifled grooves so that condensate from the warming steam is collected and directed to a bore condensate drain apparatus coupled to the rotor bore.

REFERENCES:
patent: 2883151 (1959-04-01), Dolida
patent: 4651532 (1987-03-01), Abe
patent: 5360318 (1994-11-01), Siga et al.
patent: 5433079 (1995-07-01), Badami et al.

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