F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
60/185, 170/68
F01D 5/08 (2006.01) F01D 5/14 (2006.01) F02C 7/18 (2006.01)
Patent
CA 1310273
ABSTRACT OF THE DISCLOSURE The cooling-air ducting of the axial flow gas turbine runs in the area of the last blading stage (9 + 14) radially inwards of the heat accumulation segments (23, 24) inside the outer boundary of the rotor (4) and through blade root channels (21) in the blade roots of the last moving blade ring (9) and finally through a cooling-air blade ring (28) fixed to the rotor into the diffuser into which the cooling-air flow enters with a velocity vector which essentially corresponds to the average velocity vector of the exhaust-gas flow entering into the diffuser. This avoids the flow losses which occur when the cooling-air flow passes out into the exhaust-gas flow in the area of the last stage or stages. At the same time, the temperature difference between the rotor circumference and the last rotor disk (4), likewise cooled by tapped air from the compressor, is in this way reduced, as a result of which the thermal stresses in the rotor are also reduced.
578654
Alstom (switzerland) Ltd
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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