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(12)United States Patent Kuhn etal. (10)Patent N0.: US 6,227,799 B1 (45)Date ofPatent: May 8,2001 3,844,110*10/1974Widlanskyeta1...415/60X (54) (75) (73) (*) (21) (22) (63) TURBINESHAFTOFASTEAMTURBINE HAVING INTERNAL COOLING’ AND ALSO A METHOD OF COOLING A TURBINE SHAFT Inventors: Ralf Kuhn, Diisseldorf; Stefan Sasse, Duisburg; Andreas Ulma, Miilheim an * * 11/1988 5,054,996 5,088,890 5,144,794 * 9/1992 Kirikamieta1, _415/115X 5,279,111 * 1/1994 Bell et a1. ................ 415/115 X Assignee: Notice: 5,507,620 5,611,197 5,695,319 6,010,302 * * 3/1997 Bgzuilnirkmneireléf.t..415/115 X 12/1997 Matsumotoeta1.. * 1/2000 Oeynhausen ..415/115 (58) (56) 1,820,725 2,434,901 2,469,732 7’ 276727013 2,680,001 2,788,951 2,883,151 der Ruhr; Andreas Feldmiiller, Bochum’ an of (DE) (SDiEe)mens Aktiengesellschaft, Munich Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U'S'C. 154(k)) by 0 days. 415/115 X 4/1996 Primoschitz et al. .. 416/97 R Appl. N0.: 09/472,218 Filed: Dec. 27, 1999 __ Related US. Application Data ____ ilntilnsuaiégofapplicationNo.PCT/DE98/O1618,?ledon FOREIGN PATENT DOCUMENTS 195 31 290 A1 2/1997 (DE) OTHER PUBLICATIONS Patent Abstracts of Japan No. 59—34402 A (Tsubouchi), dated Feb' 24, 1984' InternationalPublicationNo.WO97/25521(Oeynhausen), dated Jul' 17, 1997' * Cited by examiner Primary Examiner—]0hn E- RXZniC (74)Attorney, Agent, or Fzrm—Herbert L. Lerner; Laurence A, Greenberg; Werner H, Sterner (57) ABSTRACT A turbine shaft for a steam turbine, in particular having a high-pressure and an intermediate-pressure turbine section. The turbine shaft has in its interior a cooling line for passing cooling steam. The cooling line is connected, on the one hand, to an out?oW line and, on the other hand, to an in?ow line. In this Way, steam cooling of the turbine shaft can be achieved by feeding steam from the high-pressure turbine section via the in?ow line to the intermediate-pressure turbinesectionthroughtheoutflowline.Theinventionalso it t thdf 1' tb' hftf t rleiriielseoame o o cooinga urinesa o aseam (30) Jun. 27, 1997 (DE) .. 197 27 406 (51) Int.Cl.7 ..F011)5/14 (52) US.Cl...415/115 Foreign Application Priority Data Field of Search .. 415/111, 112, 415/115; 416/97 R _ References Clted U.S. PATENT DOCUMENTS * 8/1931 * 1/1948 * 5/1949 i * 3/1954 * 6/1954 * 4/1957 * 4/1959 Bailey .. 415/115 29a 6'“ 21 2 11!. 2L ‘ 31 15 Buck eta1. Kalitirlsky - ied‘zlthd Omar Lundquist " 415/112 415/112 415/115X Batt 415/115 Flint 415/112 Dolida .. 416/96 R ' 22 s 21 27 2a M3 _ _i_.___._._l_ _ _71___.__._,5.___.._. 7'7“ ,5 32 29b 31] L 1,13 5 1b - 1 1 ,, 4,786,238 Eartensen et al. .. 415/112 X a ayama . US006227799B1 Glaser et al. .. 415/175 X 10/1991 Carreno. * 2/1992 JeWess ................................415/112 * 321521151atal ,, in0. 20 Claims, 2 Drawing Sheets 25 22 25 9PDF Image | TURBINE SHAFT OF A STEAMTURBINE HAVING INTERNAL COOLING
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