TURBINE ROTOR RETENTION SYSTEM

摘要

Damping of a turbine rotor is attained by a weighted member (26) trapped between pockets (24) formed in the neck of adjacent blades (10) at one end and a space between the disk (36) and rotor seal (34) and forward extending blade lug (50) at the other end. The feather seal (52) which is a curved plate fits over the top of the weighted member (26) and is trapped between nubs (54,56) formed on the front and rear underside of the blade platform (20). The front face (46) of the rim of the disk (36) at the disk cavity is open ended and blocked off at the rear face. This assembly allows for individual blade removal and viewing from the rear face by removing a single rim cavity cover without disturbing the remaining components of the assembly. The inverted ring (76,78) supports take up the axial loads alleviating the loads heretofore taken up by the TOBI rotor seal (36), allowing for a lighter weight installation.