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(12)United States Patent Burdgick (54) HORIZONTALJOINTSEALINGSYSTEM FOR STEAM TURBINE DIAPHRAGM ASSEMBLIES (75) Inventor: StevenSebastianBurdgick, Schenectady NY (Us) ’ (73) Assignee: GeneralElectricCompany, Schenectad ,NY US y ( ) (*) Notice: Subjecttoanydisclaimer,thetermofthis patent is extended or adjusted under 35 U50 154(1))by250days- (21) Appl-N0510/446,685 (10)PatentN0.: US 6,971,844B2 (22) Filed: (65) May29,2003 *citedbyexaminer PrimaryExaminer—HoangNguyen (74)Attorney,Agent, orFirm—Nixon & Vanderhye P.C. (57) ABSTRACT Spline seals are provided in registering end faces of upper and loWer diaphragm segments in a steam turbine at each of the horizontal joints. The diaphragm segments each include inner and outer semi-annular rings With circumferentially spaced partitions extending therebetWeen. The registering end faces of each of the inner and outer semi-annular rings of the segments are spanned by spline seals Which may comprise a sheet metal plate, a sheet metal body having reversely-curved ends, a solid body having bulbous ends or a sheet metal plate covered by a metallic or ceramic Woven cloth. Leakage paths, both in axial and radial directions, are minimized 0r precluded 15 Claims, 4 Drawing Sheets Pnor Pubhcatlon Data US 2004/0240986A1 Dec 2,2004 (51) Int. Cl.7 .. F01D 25/26 (52) US. Cl. .. 415/139; 415/170.1 (58) FieldofSearch..415/139,170.1, 415/173.5,174.5 (56) ReferencesCited (45) Date of Patent: Dec. 6, 2005 US006971844B2 U.S. PATENT DOCUMENTS 6,340,285B1* 1/2002Gonyoueta1.............415/116 6,343,911B1* 2/2002Burdgick 6,419,445 B1: 7/2002 Burdgick 6,648,332 B1 11/2003 Burdgick 6,722,846B2* 4/2004Burdgick 6,722,850B2* 4/2004Burdgick...................415/230 415/115 415/116 ..277/303 415/1735PDF Image | HORIZONTAL JOINT SEALING SYSTEM FOR STEAM TURBINE
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