Steam turbine flow direction control system

Details Steam turbine flow direction control system Steam turbine flow direction control system

1989-02-06

1990-09-18

Kwon, John T.

Rotary kinetic fluid motors or pumps

Including means for handling portion separated from working...

415 20, 415914, F01D 2530

Patent

active

049574108

ABSTRACT:
A method and system for maintaining forward flow direction and controlling the path of steam flow following trips of reheat turbines, by maintaining pressure differentials to control the direction and path of the steam flow. After a turbine trip, pressure at the exhaust stage is reduced by extracting steam at a point just upstream of the exhaust and dumping it to a lower pressure zone, feedwater heater, or condenser. Additionally, pressure is increased at the inlet by introducing HP exhaust into the impulse chamber. Secondly, pressure is reduced on the concave, pressure side of turbine blading nearest the turbine exhaust by applying suction to steam collection channels running the length of the pressure surfaces thereof, thereby keeping the path of steam flow in contact with the pressure surfaces of the blades.

REFERENCES:
patent: 3694102 (1972-09-01), Conrad
patent: 3966355 (1976-06-01), Pierpoline
patent: 4720235 (1988-01-01), Lachance et al.
patent: 4844689 (1989-07-01), Seed

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