Turbine blade with serpentine cooling circuit formed within the tip shroud

摘要

A turbine rotor blade with a tip shroud that has a baffle seal with a knife edge to form a seal with a honeycomb seal of the shroud, where the tip shroud includes larger ribs that form separate compartment each with smaller ribs that form serpentine flow cooling circuits within the compartment to provide cooling for the tip shroud. Two hard faces each include an impingement cavity connected to one of the serpentine to provide impingement cooling to the backside wall of the hard face surface. The tip shroud periphery includes film cooling holes to discharge the spent cooling air from the serpentine circuits out from the tip periphery. A row of baffle seal cooling holes connect the serpentine circuit to the pressure side of the knife edge to provide cooling for the baffle seal.