Closed circuit blade-cooled turbine

A gas turbine having rotor wheels of a plurality of stages and moving blades of a plurality of stages arranged in a flow direction of a main flow gas of the gas turbine, said moving blades being fixed to outer peripheries of said rotor wheels of said respective stages, and a coolant being supplied to moving blades of at least first and second stages of said plurality of stages on an upstream side with respect to the main gas flow, wherein

• said rotor is formed by stacking wheels and spacers alternately and strongly fixing the stacked wheels and spacers by a stacking bolt,
• a coolant supply flow path for said first stage moving blades and a coolant supply flow path for said second stage moving blades have a branch point at which said coolant supply flow paths are branched,
• said coolant supply flow path for said first stage moving blades and said coolant supply flow path for said second stage moving blades have hole portions formed in said wheels for said first and second stages, respectively, said hole portions being connected to hole portions formed inside said moving blades of said first and second stages, respectively, and
• members each having a coolant flow rate change portion are provided in said connected hole portions for supplying coolant for said second stage moving blades.

A gas turbine having moving blades of a plurality of stages arranged in a flow direction of a main flow gas of the gas turbine, said moving blades being fixed to an outer periphery of a rotor, and a coolant being supplied to moving blades of at least a first and second stages of said plurality of stages on an upstream side with respect to the main gas flow, wherein

• said rotor is formed by stacking wheels and spacers alternately and strongly fixing the stacked wheels and spacers by a stacking bolt, said moving blades of said stages being held by said wheels of said stages, respectively,
• a coolant supply flow path for said first stage moving blades and a coolant supply flow path for said second stage moving blades have a branch point at which said coolant supply flow paths are branched,
• each of said coolant supply flow path for said first stage moving blades and said coolant supply flow path for said second stage moving blades has flow paths for supplying the coolant, said flow paths being connected to coolant flow paths inside said moving blades of each of said first and second stages, respectively, and
• a member having an inside flow path is arranged so as to cover a connection portion at which said second stage moving blades and said wheel of said second stage are in contact with each other.