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

Abstract

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.

1 . 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 said rotor by the interposition of a base portion ( 18 ) formed in a single piece with said blades ( 12 ), on the opposite portion of said blades ( 12 ) with respect to said base portion ( 18 ), one or more covering belts ( 24 ) also being envisaged which group the blades ( 12 ) of said rotor in packs, characterized in that said blades ( 12 ) and said one or more covering belts ( 24 ) are coupled by riveting, and the coupling between said base portion ( 18 ) of the blades ( 12 ) and the main body or disk ( 22 ) of said rotor is effected by fork insertion in the radial direction of said rotor.  
   
   
       2 . The rotor according to  claim 1 , characterized in that each of said blades ( 12 ) has, on its contact portion with said one or more covering belts ( 24 ), one or more pins ( 26 ) which are inserted in corresponding holes situated on said one or more covering belts ( 24 ).  
   
   
       3 . The rotor according to  claim 2 , characterized in that said pins ( 26 ) are riveted after insertion in said holes to effect the definitive coupling between said one or more covering belts ( 24 ) and said blades ( 12 ).  
   
   
       4 . The rotor according to  claim 1 , characterized in that on the circumference of said disk ( 22 ) there are one or more grooves inside which one or more corresponding prongs ( 28 ) are inserted, obtained on said base portion ( 18 ) of the blades ( 12 ).  
   
   
       5 . The rotor according to  claim 4 , characterized in that the blocking in position of said blades ( 12 ) on said disk ( 22 ) is obtained by means of a series of pins ( 30 ) which are introduced into specific pass-through holes situated on said prongs ( 28 ) and on said disk ( 22 ), in a parallel direction to the axis of the rotor.  
   
   
       6 . A rotor for traction engines, in particular of a first phase of a vapor turbine, as previously described and illustrated and for the purposes specified above.