An arrangement for sealing a steam-cooled gas turbine

Details An arrangement for sealing a steam-cooled gas turbine An arrangement for sealing a steam-cooled gas turbine

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 5/08 (2006.01) F01D 5/06 (2006.01) F01D 5/14 (2006.01) F01D 5/18 (2006.01)

Patent

CA 2321375

The invention provides a steam-cooled gas turbine with a plurality of blades cooled by a steam supplied from an external steam source. The rotor of the steam-cooled gas turbine is composed of a plurality of rotor disks connected by a plurality of spindle bolt extending through the rotor disks. The rotor includes a steam supply passage extending in the rotor, a steam supply chamber for distributing the steam to the respective blades, a steam recovery chamber for equally receiving the steam used for cooling the blades, and a steam recovery passage for directing the steam from the steam recovery chamber to the outside of the steam-cooled gas turbine. A sealing member in the form of substantially a ring, for sealing the steam leakage between the rotor and the spindle bolts, is disposed about each of the spindle bolts. The rotor includes recesses, disposed coaxially with the respective spindle bolt holes, for receiving the sealing members. A plurality of holding members holds the sealing members in place within the respective recesses by axially clamping the sealing members and engaging with the inner walls of the recesses.

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