Steam turbines, seals, and control methods therefor

Details Steam turbines, seals, and control methods therefor Steam turbines, seals, and control methods therefor

2011-07-26

2011-07-26

Look, Edward (Department: 3745)

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

Casing, runner, or shaft position or extent of motion...

C415S176000, C415S178000, C415S230000

Reexamination Certificate

active

07985045

ABSTRACT:
A steam turbine comprises a rotor with moving blades attached thereto; diaphragms which surround the rotor from an outer periphery side of the rotor; a casing which encloses the diaphragms and the rotor and has an upper half and a lower half clamped together through respective flanges; a displacement detector for measuring a difference d in thermal expansion in the rotor axis direction between the casing and the rotor; heating/cooling devices attached to the flanges respectively to heat and cool the flanges; and a controller which makes control so that the flanges are heated or cooled by the heating/cooling devices until a measured value obtained by the displacement detector reaches a preset value M or S in unsteady operation.

REFERENCES:
patent: 7037065 (2006-05-01), Reigl
patent: 7549834 (2009-06-01), Kirchhof et al.
patent: 62-34103 (1987-02-01), None
patent: 04325702 (1992-11-01), None

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