LIQUID-COOLED TURBINE ROTOR

摘要

An arrangement is provided for supplying liquid coolant to liquid-cooled turbine buckets of a gas turbine power plant. The buckets have internal coolant passages and the outer rims of turbine discs have coolant channels which communicate coolant from the discs to the passages in the buckets. The forward, intermediate and aft discs with sealing spacers interposed between adjacent discs are mounted on a shaft. The arrangement includes a forward flange, an intermediate flange and an aft flange. The flanges are adjacent to the corresponding discs. The forward and aft flanges, the discs and the spacers have a plurality of aligned axially extending apertures circumferentially disposed about the shaft. Bolts extend through the apertures to secure the discs, spacers and flanges in abutting contact. Each of the interposed spacers cooperates with a corresponding disc to form a circumferentially disposed chamber. In order to supply liquid coolant to the rotor, the shaft includes an axially extending passage for liquid coolant having openings radially inwardly of the flanges for discharging coolant onto the flanges. The flanges direct the coolant, under influence of centrifugal force, to the discs. The discs include means for communicating coolant from the forward flange to a forward chamber, from the intermediate flange to an intermediate chamber and from the aft flange to an aft chamber. The forward, intermediate and aft chambers direct coolant, under influence of centrifugal force, to the outer rim channels in the corresponding discs.