Joining structure of a turbine rotor

Details Joining structure of a turbine rotor Joining structure of a turbine rotor

1991-02-20

1991-12-31

Seidel, Richard K.

Metal fusion bonding

Process

Metal to nonmetal with separate metallic filler

228135, 403 30, 403272, B23K 3102

Patent

active

050764845

ABSTRACT:
In a joining structure of a turbine in which a shaft portion of a ceramic turbine rotor is joined to a metal shaft in the through bore of a metal sleeve by brazing, the joining structure of this invention comprises a first flange formed on the metal sleeve, the first flange extending toward the axis of the through bore, a second flange formed on the metal shaft, the second flange extending outward and the outside diameter thereof being larger than the inner diameter of the first flange, wherein side surfaces of the first and the second flanges are engaged and brazed with each other. An intermediate layer may be interposed between the bottom end of the shaft portion of the turbine rotor and the bottom end of the metal shaft for reinforcement. The intermediate layer is made of one or more than one metal selected from the group consisting of Ni, Cu, Fe, Ag, KOVAR, Fe-Ni Alloy, and W alloy.

REFERENCES:
patent: 3666302 (1972-05-01), Kellett
patent: 4659245 (1987-04-01), Hirao et al.
patent: 4740429 (1988-04-01), Tsuno
patent: 4778345 (1988-10-01), Ito et al.

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