Patent ID: 6666645
Filing Date: 2003-12-23
Classification: F01D,F05D

Abstract:
An arrangement for adjusting diameter of a gas turbine stator, comprising:a casing having a main portion; a plurality of rings bordering a vein of a gas flow and located in front of respective levels of mobile blades of a rotor, the plurality of rings being surrounded by the casing and being fixed onto the casing by circular groups of spacers each including one or more walls extending from the casing to one of the plurality of rings and separating two chambers, each of the one or more walls including an outside edge curved into a spacer hook and engaged between the main portion of the casing and a respective appendage curved into a casing hook associated with the spacer hook; and a plurality of communication passages of a gas flow under pressure and existing between the two chambers, wherein at least one of the plurality of communication passages is realized by a plurality of cavities provided through a junction of hooks that includes one of the spacer hooks and the associated casing hook.