Patent ID: 7273347

Claim:
A blade and stator system for a gas turbine, the system comprising: a stator including a stator cooling system; a blade body including a tip, the blade body including an internal cooling system; a shroud extending circumferentially along the blade tip; a first cooling arrangement configured and arranged to cool a first region of the shroud with cooling air from the blade body internal cooling system; a second cooling arrangement configured and arranged to cool a second region of the shroud with cooling air from the stator cooling system, the second cooling arrangement being arranged in the stator radially opposite the shroud; wherein the first and second cooling arrangements are configured and arranged to cause cooling of a different type; wherein the first cooling arrangement is configured and arranged to cause convective cooling and film cooling of the first region of the shroud, and the second cooling arrangement is configured and arranged to cause impingement cooling of the second region of the shroud; wherein the first region of the shroud is the first region in the direction of the hot gas flow; wherein said first region includes a first fin which extends radially and circumferentially; wherein the first cooling arrangement is arranged in the first fin, the first fin having a plurality of bores which are flow-connected to the blade internal cooling system; and wherein the stator includes a stator housing, the stator cooling system is located in the stator housing, and the second cooling arrangement includes, through the stator housing, a cooling duct which is flow-connected to the stator cooling system and directed onto the second region of the shroud.