Patent ID: 6524061
Filing Date: 2003-02-25
Classification: F01D,F05D,F16B,Y10T

Abstract:
A steam-cooled gas turbine with a plurality of blades cooled by steam, comprising:a rotor for supporting the blades, the rotor comprising a plurality of rotor disks which include a plurality of spindle bolt holes circumferentially arranged at intervals and spindle bolts extending through the spindle bolt holes to connect the plurality of rotor disks to each other to define the rotor, the rotor including a steam supply passage extending in the rotor; a steam supply chamber, fluidly connected to the steam supply passage and the respective blades, for distributing the steam to the respective blades; a steam recovery chamber, fluidly connected to the respective blades, for equally receiving the steam used for cooling the blades; and a steam recovery passage, fluidly connected to the steam recovery chamber, for directing the steam from the steam recovery chamber to the outside of the steam-cooled gas turbine; a sealing member substantially in the form of a ring, disposed about each of the spindle bolts, for sealing steam leakage between the rotor and the spindle bolts; the rotor disk including recesses, disposed coaxially with the respective spindle bolt holes, for receiving the respective sealing member, each of the recesses having an annular bottom wall and an inner wall connected to the bottom wall, the inner wall having a diameter larger than that of the spindle bolt hole; a plurality of holding members for holding the sealing members in place within the respective recesses by axially clamping the sealing members and engaging with a respective inner wall of a recess of the recesses.