(19)
(11) EP 1 793 165 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.02.2009 Bulletin 2009/09

(43) Date of publication A2:
06.06.2007 Bulletin 2007/23

(21) Application number: 06024947.1

(22) Date of filing: 01.12.2006
(51) International Patent Classification (IPC): 
F23D 11/38(2006.01)
 F23D 11/24(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 02.12.2005 JP 2005348619

(71) Applicant: HITACHI, LTD.
Chiyoda-ku Tokyo 100-8280 (JP)

(72) Inventors:
  • Hirata, Yoshitaka
    6-1, Marunouchi 1-chome Chiyoda-ku, Tokyo 100-8220 (JP)
  • Yoshida, Shouhei
    6-1, Marunouchi 1-chome Chiyoda-ku, Tokyo 100-8220 (JP)
  • Sasao, Toshifumi
    6-1, Marunouchi 1-chome Chiyoda-ku, Tokyo 100-8220 (JP)
  • Takehara, Isao
    6-1, Marunouchi 1-chome Chiyoda-ku, Tokyo 100-8220 (JP)
  • Inoue, Hiroshi
    6-1, Marunouchi 1-chome Chiyoda-ku, Tokyo 100-8220 (JP)

(74) Representative: Beetz & Partner 
Patentanwälte Steinsdorfstrasse 10
80538 München
80538 München (DE)

   


(54) Liquid fuel nozzle, gas turbine combustor, and method of rebuilding gas turbine combustor


(57) In a liquid fuel nozzle, a main injection hole 109 for jetting main fuel 33 is of a structure having a straight portion which is in the form of an annular flow path extending parallel to an axis of the liquid fuel nozzle 9, the annular flow path having a flow path cross section not changed along the straight portion. Since the flow rate of fuel jetted out of each liquid fuel nozzle 9 is held even, a deviation of the fuel flow rate can be suppressed without degrading atomization performance of each liquid fuel nozzle mounted in each combustor, and a liquid fuel nozzle with high reliability can be obtained.










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