Ceramic turbine blade having a metal support core

Details Ceramic turbine blade having a metal support core Ceramic turbine blade having a metal support core

1984-02-17

1986-01-07

Powell, Jr., Everette A

Fluid reaction surfaces (i.e., impellers)

With fluid passage in working member communicating with...

Discharge solely at periphery normal to rotation axis

416225, 416241B, F01D 518, F01D 528

Patent

active

045631280

ABSTRACT:
A hot gas impinged turbine blade suitable for use under super-heated gas operating conditions has a hollow ceramic blade member and an inner metal support core extending substantially radially through the hollow blade member and having a radially outer widened support head. The support head has radially inner surfaces against which the ceramic blade member supports itself in a radial direction on both sides of the head. The radially inner surfaces of the head are inclined at an angle to the turbine axis so as to form a wedge or key forming a dovetail type connection with respectively inclined surfaces of the ceramic blade member. This dovetail type connection causes a compressive stress on the ceramic blade member during operation, whereby an optimal stress distribution is achieved in the ceramic blade member.

REFERENCES:
patent: 2479057 (1949-08-01), Bodger
patent: 3844728 (1974-10-01), Copley
patent: 4221540 (1980-09-01), Savonuzzi
patent: 4247259 (1981-01-01), Saboe et al.
patent: 4285634 (1981-08-01), Rossman et al.
patent: 4314794 (1982-02-01), Holden
patent: 4396349 (1983-08-01), Hueber
patent: 4471008 (1984-09-01), Huther
patent: 4473336 (1984-09-01), Coney et al.

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