Ceramic rotor blade having root with double curvature

Details Ceramic rotor blade having root with double curvature Ceramic rotor blade having root with double curvature

1977-07-20

1979-10-02

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received in well or slot

416241B, F01D 530

Patent

active

041696948

ABSTRACT:
A turbine blade having a root provided with a curvature in its transverse and longitudinal cross sections. The root is receivable within the groove in the outer periphery of an attachment piece and the surface portions defining the groove have curvatures slightly greater than those of the root. A compliant pad can be inserted in the groove between each side of the root, respectively, and the corresponding surface portion of the attachment piece. Initially, the root will have a single point of contact with the adjacent surface portion or the compliant pad; but as the blade rotates, this point of contact becomes a line or surface contact to cause loads to be more uniformly distributed between the root and adjacent surface portions.

REFERENCES:
patent: 2317338 (1943-04-01), Rydmark
patent: 2821357 (1958-01-01), Schorner
patent: 3378230 (1968-04-01), Toomey
patent: 3784320 (1974-01-01), Rossmann et al.
patent: 3910719 (1975-10-01), Hessler et al.

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