Method for modifying a turbine diaphragm for use with a reduced

Details Method for modifying a turbine diaphragm for use with a reduced Method for modifying a turbine diaphragm for use with a reduced

1994-09-13

1996-06-11

Cuda, Irene

Metal working

Method of mechanical manufacture

Impeller making

298892, 2940209, B23P 1500

Patent

active

055243401

ABSTRACT:
The diaphragm modification includes providing ring segments having radial outward projecting tenons for reception in dovetail grooves of the diaphragm bore. Seal strips extend about the outer face of the segment rings for engaging the diaphragm bore and crush pins are disposed around the sides of the tenons to provide close tolerance fit between the dovetail hooks of the diaphragm, thus accommodating any out-of-roundness or eccentricity of the diaphragm extant through prior use. Bolts are applied in tapped openings of the segment rings and diaphragm to facilitate securement of the segment rings and diaphragm and the segments 34 are seal-welded to the diaphragm. New packing ring segments are provided in the dovetail grooves along the radial inner face of the segment rings to complete the stage sealing between the diaphragm and reduced diameter rotor.

REFERENCES:
patent: 3386155 (1968-06-01), Jenkinson
patent: 4606102 (1986-08-01), Riethmuller
patent: 4924581 (1990-05-01), Jakobsen
patent: 5031311 (1991-07-01), Comensoli
patent: 5205465 (1993-04-01), Bogard et al.

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