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. The holes in the radial direction and the cooling air supply holes are interconnected and supply mem

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. The holes in the radial direction and the cooling air supply holes are interconnected and supply members covering the connection are installed. The cooling air after cooling the second stage moving blades is introduced into collection holes formed in the outer periphery of the spacer via the cooling air collection holes. The cooling air collection holes and collection holes are interconnected and collection members covering the connection are installed. 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 main gas of a gas turbine and fixed to the outer periphery of a rotor, supplying a refrigerant at least to first stage and second stage moving blades from an upstream side among

1. A closed circuit blade cooled turbine having moving blades at a plurality of stages arranged in a flowing direction of main gas of a gas turbine and fixed to the outer periphery of a rotor, supplying a refrigerant at least to 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, wherein said 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, and 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, and the sum of minimum sectional areas of any parts of said plurality of parallel flow paths for refrigerant supply for said second stage moving blades and said plurality of parallel flow paths for refrigerant collection and said respective refrigerant flow paths in said second stage moving blades is always smaller than the sum of minimum sectional areas of any parts of said plurality of parallel flow paths for refrigerant supply for said first stage moving blades and said plurality of parallel flow paths for refrigerant collection and said respective refrigerant flow paths in said first stage moving blades. 2. 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 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, wherein said 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, and the sum of minimum sectional areas of any parts in the neighborhood of connections of said plurality of parallel flow paths for refrigerant supply for said second stage moving blades and said respective refrigerant flow paths in said second stage moving blades and in the neighborhood of connections of said plurality of parallel flow paths for refrigerant collection for said second stage moving blades and said respective refrigerant flow paths in said second stage moving blades is always smaller than the sum of minimum sectional areas of any parts in the neighborhood of connections of said plurality of parallel flow paths for refrigerant supply for said first stage moving blades and said respective refrigerant flow paths in said first stage moving blades and in the neighborhood of connections of said plurality of parallel flow paths for re frigerant collection for said first stage moving blades and said respective refrigerant flow paths in said first stage moving blades. 3. A closed circuit blade cooled turbine having moving blades at a plurality of stages arranged in a flowing direction of main gas of a gas turbine and fixed to the outer periphery of a rotor, supplying a refrigerant at least to 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, wherein said 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, and 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; the sum of minimum sectional areas of any parts of said plurality of parallel flow paths for refrigerant supply for said second stage moving blades and said plurality of parallel flow paths for refrigerant collection and said respective refrigerant flow paths in said second stage moving blades is always smaller than the sum of minimum sectional areas of any parts of said plurality of parallel flow paths for refrigerant supply for said first stage moving blades and said plurality of parallel flow paths for refrigerant collection and said respective refrigerant flow paths in said first stage moving blades; and wherein members suppressing leakage of refrigerant are detachably mounted on refrigerant flow courses to adjust said minimum sectional areas. 4. 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 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, wherein said 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; the sum of minimum sectional areas of any parts in the neighborhood of connections of said plurality of parallel flow paths for refrigerant supply for said second stage moving blades and said respective refrigerant flow paths in said second stage moving blades and in the neighborhood of connections of said plurality of parallel flow paths for refrigerant collection for said second stage moving blades and said respective refrigerant flow paths in said second stage moving blades is always smaller than the sum of minimum sectional areas of any parts in the neighborhood o f connections of said plurality of parallel flow paths for refrigerant supply for said first stage moving blades and said respective refrigerant flow paths in said first stage moving blades and in the neighborhood of connections of said plurality of parallel flow paths for refrigerant collection for said first stage moving blades and said respective refrigerant flow paths in said first stage moving blades; and wherein members suppressing leakage of refrigerant are detachably mounted on refrigerant flow courses to adjust said minimum sectional areas. 5. A closed circuit blade cooled turbine having moving blades at a plurality of stages arranged in a flowing direction of main gas of a gas turbine and fixed to an outer periphery of a rotor, supplying a refrigerant at least to first stage and second stage moving blades from the upstream side among said moving blades at said plurality of stages, and collecting said refrigerant after cooling without discharging it into the main gas, wherein said rotor has inside a branch point of a refrigerant supply path for said first stage moving blades and 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, supply members or collection members each having inside an inner flow path are arranged at least second stage side connection portions of first stage side connection portions of said plurality of parallel flow paths for refrigerant supply and said plurality of parallel flow paths for refrigerant collection for said first stage moving blades to said respective refrigerant flow paths in said first stage moving blades, and second stage side connection portions of said plurality of parallel flow paths for refrigerant supply and said plurality of parallel flow paths for refrigerant collection for said second stage moving blades to said respective refrigerant flow paths in said second stage moving blades, the sum of minimum sectional areas of any parts of said plurality of parallel flow paths for refrigerant supply for said second stage moving blades and said plurality of parallel flow paths for refrigerant collection and said respective refrigerant flow paths in said second stage moving blades is always smaller than the sum of minimum sectional areas of any parts of said plurality of parallel flow paths for refrigerant supply for said first stage moving blades and said plurality of parallel flow paths for refrigerant collection and said respective refrigerant flow paths in said first stage moving blades, and said supply members or collection members, each having inside an inner flow path, are members detachably provided to suppress leakage of refrigerant.