Patent ID: 7794210
Filing Date: 2010-09-14
Classification: F01D,F04D,F05D,Y10S,Y10T

Abstract:
1. A turbomachine blade comprising a root portion and an aerofoil portion, the aerofoil portion having a leading edge, a trailing edge, a concave wall portion extending from the leading edge to the trailing edge and a convex wall portion extending from the leading edge to the trailing edge, the concave wall portion and the convex wall portion forming a continuous integral wall, the aerofoil portion having a hollow interior defined by at least one internal surface, the hollow interior of the aerofoil portion being at least partially filled with a vibration damping material having a decomposition temperature and which is separated from the wall portions by a thermally insulating material that inhibits decomposition of the vibration damping material when the blade is subject to a localised heat treatment at a temperature in excess of the decomposition temperature of the vibration damping material.