Method for repairing partitions of a turbine diaphragm

Details Method for repairing partitions of a turbine diaphragm Method for repairing partitions of a turbine diaphragm

1995-08-07

1997-12-16

Cuda, Irene

Metal working

Method of mechanical manufacture

Impeller making

29889, 2940218, B23P 1500

Patent

active

056971516

ABSTRACT:
The repair method includes removing eroded or damaged trailing edge portions of partitions in the diaphragm of a turbine, over 50% of the length of the partitions being removed commencing at the trailing edge. A coupon which is a precise replication of a portion of an originally specified partition is welded to the remaining or extant partition portion by a seal weld along the radial length of the coupon on the suction side of the repaired partition and two full penetration welds at the ends of the coupon to secure it to the inner and outer rings or side walls of the diaphragm. The repaired partition is thus substantially identically contoured as the original partition.

REFERENCES:
patent: 4832252 (1989-05-01), Fraser
patent: 5031313 (1991-07-01), Blair et al.
patent: 5060842 (1991-10-01), Qureshi et al.
patent: 5062205 (1991-11-01), Fraser
patent: 5142778 (1992-09-01), Smolinski et al.
patent: 5152058 (1992-10-01), Legros
patent: 5185924 (1993-02-01), Fraser
patent: 5197191 (1993-03-01), Dunkman et al.
patent: 5259727 (1993-11-01), Quinn
patent: 5269057 (1993-12-01), Mendham

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