Turbomachinery blade or vane with a permanent machining datum

Details Turbomachinery blade or vane with a permanent machining datum Turbomachinery blade or vane with a permanent machining datum

1997-10-17

1999-10-26

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

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

Axially extending shroud ring or casing

416 61, 416189, 416192, 416223A, 416223R, 416248, 415118, 4151731, 4151735, 4151736, B63H 126

Patent

active

059717106

ABSTRACT:
A turbine blade (18) for a gas turbine engine includes a machining datum (60) that extends radially from a pocket (54) in the outer shroud (36) of the blade. The datum is spaced from a sidewall (64) of the pocket so that the datum is peripherally continuous irrespective of whether the blade is in a prefinished state or in a completely finished state. Because the datum's peripheral continuity survives the original manufacturing process, the datum is available for use in post-manufacturing inspection and repair operations.

REFERENCES:
patent: 4576551 (1986-03-01), Oliviver et al.
patent: 5288209 (1994-02-01), Therrien et al.
patent: 5544873 (1996-08-01), Vickers et al.

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