BLADE RETAINING SIDEPLATE AND TURBINE DISK ASSEMBLY

摘要

A turbine wheel assembly having an improved disk and sideplate construction is disclosed. A multiplicity of turbine blades is conventionally mounted on a turbine disk which includes a plurality of sideplate retaining lugs along the periphery of the disk. A plurality of segmented sideplates is affixed to the side of the disk and each blade has a root section which engages a correspondingly shaped slot in the disk. The lugs include an arcuate surface to engage a corresponding bearing surface on one of the sideplates and to radially retain the sideplate during rotation of the wheel assembly. Additionally, the rotation of the wheel assembly urges the sideplate axially against the side of the disk to seal the interface between the blade root sections and the corresponding disk slots.