Shroud insert for turbomachinery blade

Details Shroud insert for turbomachinery blade Shroud insert for turbomachinery blade

1990-07-31

1992-01-28

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Axially extending shroud ring or casing

416191, 416224, 416229A, 298897, F01D 516

Patent

active

050839039

ABSTRACT:
A method and apparatus for forming a hardened contact surface on a shroud of a turbomachinery blade comprising casting the blade and internal shroud with a metal insert into the casting mold so that the blade is cast with the insert in place. The insert may be formed with a projection extending from a wear surface of the shroud into the plane of the blade shroud such that the material from which the blade is made is cast about the projection to firmly and mechanically hold the insert in place. Each insert is preferably formed of a relatively low coefficient of friction and high wear resistant material whereby contact between abutting inserts on adjacent shroud surfaces have a high degree of slippage.

REFERENCES:
patent: 3185441 (1965-05-01), Reuter
patent: 3327995 (1967-06-01), Blackhurst et al.
patent: 3576377 (1971-04-01), Beanland
patent: 4257741 (1981-03-01), Betts et al.
patent: 4589175 (1986-05-01), Arrigoni
patent: 4948338 (1990-08-01), Wickerson

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