Title: Method and apparatus for removing one or more vanes from a gas turbine compressor stator

Abstract: Disclosed is an improved method and apparatus for removing damaged or worn vanes which are brazed or otherwise metallurgically attached between the concentric inner and outer shroud members of a gas turbine compressor stator. The method involves punching one of the attached vane ends in the radial direction relative to the concentric shroud members with sufficient force to shear the metallurgical joints holding the vane in the shroud slots. During punching, the shroud members are rigidly supported against deformation in the vicinity of the attached vane ends and the vane itself is supported laterally to prevent buckling thereof. With the invention, a stator can be repaired with no diminution in structural strength as compared to a new part. A punch and die assembly for use in removing a damaged vane is also disclosed.

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Inventors: Ryan, Edward J. (Wallingford, CT, US)

Application Number: 828370
Filing Date: 1977-08-29
Publication_date: 1979-02-27
Assignee: United Technologies Corporation (Hartford, CT)
Primary Class(es): 29/889.1 29/252, 83/188
Other Classes:
US Patent Ref:

3698273	Oct, 1972	Richard et al.	83/188.
3802046	Apr, 1974	Wachtell et al.	29/156.
3909157	Sep, 1975	Wachtell et al.	29/156.

Other Refs:
Primary Examiner: Mehr, Milton S.
Assistant Examiner:
Attorney: Timmer; Edward J.