Patent ID: 11970951
Assignee: HAMILTON SUNDSTRAND CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 0:
1. A rotor for a turbomachine, the rotor comprising:
a hub centered on a central axis and having a disk portion and a shaft portion; and
a blade extending outward from the hub, the hub and the blade together comprising:
a plastic substrate, the plastic substrate comprising:
a matrix material; and
fibers embedded in the matrix material, the fibers having a first coefficient of thermal expansion wherein a fiber density of the fibers embedded in the matrix material varies within the plastic substrate; and

a metal plating disposed on at least a portion of an outer surface of the plastic substrate, the metal plating having a second coefficient of thermal expansion,
wherein the fibers are selected such that a bulk coefficient of thermal expansion of the plastic substrate at the outer surface of the plastic substrate substantially matches the second coefficient of thermal expansion of the metal plating; and
wherein the plastic substrate comprises an outer region disposed adjacent to the metal plating, the outer region having an increased fiber density.