Closed circuit blade-cooled turbine

A closed circuit blade cooled turbine having moving blades at a plurality of stages arranged in the flowing direction of 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 the upstream side among said moving blades at said plurality of stages, and collecting said refrigerant after cooling without discharging it into 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,
• 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.

A closed circuit blade cooled turbine having moving blades at a plurality of stages arranged in the flowing direction of 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 the upstream side among said moving blades at said plurality of stages, and collecting said refrigerant after cooling without discharging it into 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 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
• means for adjusting an internal flow resistance is installed 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.

A closed circuit blade cooled turbine having moving blades at a plurality of stages arranged in the flowing direction of 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 the upstream side among said moving blades at said plurality of stages, and collecting said refrigerant after cooling without discharging it into 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 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,
• third 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
• said third metal fittings have means for adjusting an internal flow resistance.

A closed circuit blade cooled turbine having moving blades at a plurality of stages arranged in the flowing direction of 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 the upstream side among said moving blades at said plurality of stages, and collecting said refrigerant after cooling without discharging it into 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 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 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 refrigerant collection for said first stage moving blades and said respective refrigerant flow paths in said first stage moving blades.

A closed circuit blade cooled turbine having moving blades at a plurality of stages arranged in the flowing direction of 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 the upstream side among said moving blades at said plurality of stages, and collecting said refrigerant after cooling without discharging it into 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 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,
• at 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 refrigerant collection for said first stage moving blades and said respective refrigerant flow paths in said first stage moving blades, first metal fittings having an internal flow path are arranged,
• at 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, second metal fittings having an internal flow path are arranged, 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.

A closed circuit blade cooled turbine having moving blades at a plurality of stages arranged in the flowing direction of 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 the upstream side among said moving blades at said plurality of stages, and collecting said refrigerant after cooling without discharging it into 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 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,
• at 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, and
• means for adjusting an internal flow resistance is installed.

A closed circuit blade cooled turbine having moving blades at a plurality of stages arranged in the flowing direction of 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 the upstream side among said moving blades at said plurality of stages, and collecting said refrigerant after cooling without discharging it into main gas, wherein

• said turbine, inside said rotor, has a refrigerant supply path for said first stage moving blades, a refrigerant supply path for said second stage moving blades, a refrigerant collection path for said first stage moving blades, and a refrigerant collection path for said second stage moving blades,
• said turbine, inside said rotor, has a branch point of said refrigerant supply path for said first stage moving blades and said refrigerant supply path for said second stage moving blades and a junction of the refrigerant collection path for said first stage moving blades and said 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 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,
• at 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, third metal fittings having an internal flow path are arranged, and
• said third metal fittings have means for adjusting an internal flow resistance.