초록 ▼

In a closed circuit moving blade cooled turbine, holes in the radial direction formed in the outer periphery of a second stage wheel are led to cooling air supply holes to second stage moving blades and to prevent the cooling air from leaking into the junction, the holes in the radial direction and

In a closed circuit moving blade cooled turbine, holes in the radial direction formed in the outer periphery of a second stage wheel are led to cooling air supply holes to second stage moving blades and to prevent the cooling air from leaking into the junction, the holes in the radial direction and the cooling air supply holes are interconnected and the supply members covering the junction are fit into them. The cooling air after cooling the second stage moving blades is introduced into the collection holes formed in the outer periphery of the spacer via the cooling air collection holes and to prevent the cooling air from leaking into the boundary, the cooling air collection holes and collection holes are interconnected and the collection members covering the boundary are fit into them. To make the sum of minimum sectional areas of the respective paths of the second stage moving blades smaller than the sum of minimum sectional areas of the respective paths of the first stage moving blades, a minimum sectional member is incorporated into the supply member.

대표청구항 ▼

1. A closed circuit blade cooled turbine having moving blades at a plurality of stages arranged in a flowing direction of a main gas of a gas turbine and fixed to the outer periphery of a rotor, supplying a refrigerant at least to the first stage and second stage moving blades from an upstream side

1. A closed circuit blade cooled turbine having moving blades at a plurality of stages arranged in a flowing direction of a main gas of a gas turbine and fixed to the outer periphery of a rotor, supplying a refrigerant at least to the first stage and second stage moving blades from an upstream side among said moving blades at said plurality of stages, and collecting said refrigerant after cooling without discharging it into the main gas, whereinsaid turbine, inside said rotor, has a branch point of a refrigerant supply path for said first stage moving blades and a refrigerant supply path for said second stage moving blades and a junction of a refrigerant collection path for said first stage moving blades and a refrigerant collection path for said second stage moving blades, said refrigerant supply path and said refrigerant collection path for said first stage moving blades and said refrigerant supply path and said refrigerant collection path for said second stage moving blades have a plurality of parallel flow paths for refrigerant supply and a plurality of parallel flow paths for refrigerant collection to be connected to said respective refrigerant paths in said moving blades at each said stage between said branch point and said junction, first metal fittings having an internal flow path are arranged at any part of said plurality of parallel flow paths for refrigerant supply for said first stage moving blades, said plurality of parallel flow paths for refrigerant collection, and said respective refrigerant flow paths in said first stage moving blades, second metal fittings having an internal flow path are arranged at any part of said plurality of parallel flow paths for refrigerant supply for said second stage moving blades, said plurality of parallel flow paths for refrigerant collection, and said respective refrigerant flow paths in said second stage moving blades, and the sum of sectional areas of said internal flow paths of said second metal fittings is smaller than the sum of sectional areas of said internal flow paths of said first metal fittings.