Patent ID: 6464460
Filing Date: 2002-10-15
Classification: F01D,F05D

Abstract:
An air-cooled turbine blade, comprising:a shroud-band element at a tip of the blade, the shroud-band element extending transversely to the blade longitudinal axis, hollow spaces for the cooling being provided in the interior of the shroud-band element, said hollow spaces comprising cooling holes that are tunnel-shaped and being connected on an inlet side to at least one cooling-air passage passing through the turbine blade to the blade tip and open on an outlet side into an exterior space surrounding the turbine blade wherein a portion of the shroud-band element defining the hollow spaces conforms to the hollow spaces in shape and dimensions such that the wall thickness of the portion of the shroud-band element around the hollow spaces is reduced and is substantially the same along at least a portion of the outer periphery of said tunnel-shaped cooling holes in order to reduce the weight of the shroud-band element.