Rotor blade of a first phase of a vapor turbine with a fork foot and covering belt

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(11)

EP 1 862 642 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	25.03.2009 Bulletin 2009/13

(43)	Date of publication A2:
	05.12.2007 Bulletin 2007/49

(21)	Application number: 07108516.1

(22)	Date of filing: 21.05.2007

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International Patent Classification (IPC):

F01D 5/22^(2006.01)

F01D 5/30^(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 MT NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR MK RS

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Priority:

31.05.2006 IT MI20061064

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

(72)	Inventors:
	Cortese, Carlo 59100 Prato (IT) Bendinelli, Paolo 56030 Quattro Strade de Lavaiano-Lari Pisa (IT) Vecchiarino, Vincenzo 50127 Firenze (IT) Valeri Fabio 50141 Firenze (IT)

(74)	Representative: Bedford, Grant Richard
	GE London Patent Operation 15 John Adam Street London WC2N 6LU 15 John Adam Street London WC2N 6LU (GB)

(54)	Rotor blade of a first phase of a vapor turbine with a fork foot and covering belt

(57) A rotor for traction engines, in particular of a first phase of a vapor turbine, comprising a series of blades (12) arranged circumferentially on the rotor by the interposition of a base portion (18) formed in a single piece with the blades (12), on the opposite portion of the blades (12) with respect to the base portion (18), one or more covering belts (24) also being envisaged which group the blades (12) of the rotor in packs. The blades (12) and the covering belts (24) are coupled by the riveting of pins (26) integrated with the blades (12), and the coupling between the base portion or foot (18) of the blades (12) and the main body or disk (22) of the rotor is effected by fork insertion in the radial direction of the rotor.

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