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US 6,971,844 B2 56 10. A steam turbine according to claim 7 Wherein each saidsplinesealincludesaclothsurroundingsaidsplineseal along opposite sides thereof and about at least a pair of oppositeedgesthereof. 11. A steam turbine according to claim 7 Wherein each saidsplinesealcomprisesasealbodyhavinganenlargement along opposite edges and received in said slots With the enlargements adjacent bases of said slots, respectively. 2.Asteam turbine according to claim 1 Wherein each said splinesealextendsgenerallyinaxialandcircumferential10 bodyisformedofsheetmetal,saidenlargementscomprising the registering end faces of one of said inner and outer semi-annularringsateachhorizontaljointhavingslots opening therethrough and in general circumferential registration With one another; and a spline seal in said slots extending betWeen each of said opposed end faces of circumferentially adjacent seg mentsforminimizingorprecludingsteamleakage?oW past said registering end faces. directions for sealing against steam leakage ?oWs in gener allyradialdirections. 3.Asteam turbine according to claim 1 Wherein each said spline seal extends generally in radial and circumferential directions for sealing against steam leakage ?oWs in a 15 generally axial direction. 4.Asteam turbine according to claim 1 Wherein each said spline seal includes a cloth surrounding said spline seal along opposite sides thereof and about at least a pair of oppositeedgesthereof. 5.Asteam turbine according to claim 1 Wherein each said spline seal comprises a seal body having an enlargement along opposite edges and received in said slots With the enlargements adjacent bases of said slots, respectively. 6.A steamturbineaccordingtoclaim5Whereinsaidseal 25 bodyisformedofsheetmetal,saidenlargementscomprising integralbentportionsofsaidsheetmetalsplinesealhaving edges facing central portions of said sheet metal spline. 7. A steam turbine according to claim 1 Wherein the registering end faces of another of said inner and outer semi-annular rings at each horiZontal joint have slots open ingtherethroughandingeneralcircumferentialregistration With one another, a spline seal extending betWeen each of said opposed end faces of circumferentially adjacent seg mentsandinsaidslotsofsaidendfacesofsaidanotherof 35 said inner and outer half-rings for minimiZing or precluding steam leakage ?oW past said registering end faces. 8.Asteam turbine according to claim 7 Wherein each said spline seal extends generally in axial and circumferential directionsforsealingagainststeamleakage?oWsingener 40 allyradialdirections. 9.Asteam turbine according to claim 7 Wherein each said spline seal extends generally in radial and circumferential directions for sealing against steam leakage ?oWs in a generally axial direction. integralbentportionsofsaidsheetmetalsplinesealhaving edges facing central portions of said sheet metal spline. 13.A steamturbinecomprising: a rotor carrying a plurality of circumferentially spaced buckets; a diaphragm assembly surrounding the rotor including upperandloWerdiaphragmsegmentshavingendfaces in registration With one another adjacent horiZontal joints of the turbine, each said segment including substantially semi-annular outer and inner rings carry ing a plurality of circumferentially spaced partitions therebetWeen, the buckets and partitions forming a stage of the steam turbine; the registering end faces of said inner and outer semi annular rings at each horiZontal joint having slots opening therethrough and in general circumferential registration With one another; and a?rstsplinesealextendingbetWeeneachofsaidopposed endfacesofcircumferentiallyadjacentinnerringsand in said slots thereof, and a second spline seal extending betWeen each of said opposed end faces of circumfer entiallyadjacentouterringsandinsaidslots,Whereby steam leakage ?oW past said registering end faces is minimiZed or precluded. 14.A steamturbineaccordingtoclaim13Whereineach said ?rst and second spline seals extends generally in axial and circumferential directions for sealing against steam leakage ?oWs in generally radial directions. 15.A steamturbineaccordingtoclaim13Whereineach said ?rst and second spline seals extend generally in radial and circumferential directions for sealing against steam leakage ?oWs in a generally axial direction. 12.Asteam turbineaccordingtoclaim7WhereinsaidsealPDF Image | HORIZONTAL JOINT SEALING SYSTEM FOR STEAM TURBINE
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