Patent ID: 9605555
Date: 2017-03-28
CPC Classifications: F01D,F05D

Claim:
1. Shroud device for thermally protecting a gas turbine blade, the shroud device comprising: a ceramic layer; and a metallic layer, the metallic layer being thermally protected by the ceramic layer, the ceramic layer being mechanically joined to the metallic layer by a fixation device having a plurality of protrusions extending from the metallic layer configured to engage with a plurality of cavities located in the ceramic layer, such that a gap will exist between the cavities and the protrusions at a predetermined ambient temperature, the gap disappearing at a higher temperature operation of the gas turbine, the protrusions being then locked into the cavities, wherein the fixation device is configured such that the protrusions of the metallic layer, that are located in the cavities in the ceramic layer, are perpendicular to each other along the rotational axis of the turbine.