(19)
(11) EP 1 605 136 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.01.2009 Bulletin 2009/04

(43) Date of publication A2:
14.12.2005 Bulletin 2005/50

(21) Application number: 05253258.7

(22) Date of filing: 27.05.2005
(51) International Patent Classification (IPC): 
F01D 5/18(2006.01)
 F02C 7/18(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 MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR LV MK YU

(30) Priority: 27.05.2004 US 855049

(71) Applicant: United Technologies Corporation
Hartford, CT 06101 (US)

(72) Inventors:
  • Mongillo, Jr. , Dominic J.
    West Hartford CT 06107 (US)
  • Gregg, Shawn J.
    Wethersfield CT 06109 (US)

(74) Representative: Leckey, David Herbert 
Frank B. Dehn & Co. St Bride's House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)

   


(54) Cooled rotor blade


(57) A rotor blade (14) is provided that includes a root (20) and a hollow airfoil (22). The hollow airfoil has a cavity, a leading edge (32), and a tip (30). An internal passage configuration is disposed within the cavity that includes a first radial passage (92), a second radial passage (94), and a rib (96) disposed between the passages (92,94). The passages (92,94) and the rib (96) are contiguous with a tip endwall (98). The first radial passage (92) is disposed contiguous with the leading edge (32). A plurality of crossover apertures (74) are disposed in the rib (96). One of the crossover apertures (100) is disposed flush with the tip endwall (98). A conduit (42) is disposed within the root (20) that is operable to permit airflow through the root and into the passages. In some embodiments, an aperture (62,76) is disposed within the tip endwall (98) aligned with the first radial passage (92).







Search report