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STEAM TURBINE 2001

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STEAM TURBINE 2001 ( steam-turbine-2001 )

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(12)United StatesPatent Wieghardt (54) STEAMTURBINE (75) Inventor: KaiWieghardt,Mannheim(DE) (73) Assignee: SiemensAktiengesellschaft,Munich (10)PatentN0.: US 8,128,341B2 (*) Notice: 2 * “““““““““ 415“ B1 * 2/2001 Kubota ,, 415/106 B2 * 12/2003 Fonda-Bonardi .. 415/106 A1* 7/2003 Fonda-Bonardi ............415/106 A1 6/2005 Hiegemann eta1. (21) ApplNO_ ... , 2005/0118025 FOREIGN PATENT DOCUMENTS (22) PCT Filed: 1370254 A 991850 B1 1154123 A1 1624155 A1 9/2002 4/2000 11/2001 2/2006 (DE) Subject‘toanydisclaimer,thetermofthis patent 1s extended or adjusted under 35 U_S_C_ 154(1)) by 638 day, U-S-PATENTDOCUMENTS 4,170,435 A * 10/1979 Swearingen .....................415/1 5,061,151 A * 10/1991 Steiger .. 415/106 5,540,546 A * 7/1996 Bouricet ..415/104 6,048,169 A 4/2000 Feldmullereta1. Oct.24,2006 PCT/EP2006/067717 (2)(4)Date: API._7,2009 (87) PCTPub‘NO" W02007/051733 PCT Pub,Date; May 10,2007 (86) PCTNo.2 _1945911B1 7/2008 (65) Prior Publication Data Us 2009/0185895A1 Jul 23 2009 ' ’ § 371 (e)(1), (30) Oct.31 2005 (51) In‘;C]_ F01D 3/02 F01D 3/04 12/084300 ForeignApplicationPriorityData (EP) ..05023760 (200601) (200601) (52) US.Cl.......................................................415/106 _ _ _ P g (58) FieldofClassi?cationSearch ..415/106 hhearranged1“theCaslhg See application ?le for complete search history. 14 Claims, 7 Drawing Sheets 34 17 (56) ReferencesCited (45) Date of Patent: Mar. 6, 2012 6,193,462 6,655,910 2003/0133785 US008128341B2 CN EP EP EP EP_ * c1ted by exammer . . PrimaryExaminer*GeorgeFourson,Il (57) ABSTRACT DisclosedisasteamturbineWithacasing,Whereinaturbine shaft having a thrust-compensating piston is rotatably mountedinsidethecasinganddirectedalongarotationaxis, WhereinaHow passageisformedbetweenthecasingandthe turbineshaft.Theturbineshafthasinitsinterioracoolingline fordirectingcoolingsteaminthedirectionoftherotation axis.Thecoolingline,ononeend,~isconnectedtoatleastone m?oW lmeforthem?oW ofcoolmgsteammtothecoolmg hhethemthe?ewPassage’andehtheetherend,iseehheeted to an out?oW line for directing cooling steam onto a lateral surfaceofthethrust-compensatingpiston.An essentialaspect is,the cooling steam discharging onto the lateral surface of the thrust-compensating piston mixes With some of the live steamandisdirectedbackintotheHow assa eviaareturn

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