(19)
(11) EP 1 148 208 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.06.2004 Bulletin 2004/23

(43) Date of publication A2:
24.10.2001 Bulletin 2001/43

(21) Application number: 01303458.2

(22) Date of filing: 12.04.2001
(51) International Patent Classification (IPC)7: F01D 9/04, F01D 5/30
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 18.04.2000 IT MI000870

(71) Applicant: Nuovo Pignone Holding S.P.A.
50127 Florence (IT)

(72) Inventor:
  • Ghelli, Giuseppe
    52043 Castiglion Fiorentino (Arezzo) (IT)

(74) Representative: Goode, Ian Roy 
London Patent Operation General Electric International, Inc. 15 John Adam Street
London WC2N 6LU
London WC2N 6LU (GB)

   


(54) Turbine stator


(57) A process for producing a stator diaphragm (10) in a steam turbine or gas expander, which provides a preparation phase of two rings (12, 13), machined separately to obtain radial slots (15, 15') having the profile of the blades (11) of a stator stage of the steam turbine or of the gas expander and suitable for the subsequent housing of the blades (11), in which an appropriate quantity of brazing material (14, 14'), in the form of paste, is inserted into the cavities (15, 15') and the diaphragm (10) is subjected to a furnace brazing operation in vacuo. The invention further relates to a stator diaphragm (10) for steam turbine or gas expander.






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