Rotor assembly for an axial turbine

Abstract

A rotor assembly includes a drive shaft; a rotor having rotor blades, which each comprise a profiled rotor blade section and a blade fastening section; wherein each blade fastening section comprises a first contact region and a second contact region, the first contact region being at least indirectly supported on the blade fastening section of a first adjacent rotor blade, the second contact region being at least indirectly supported on the blade fastening section of a second adjacent rotor blade; the blade fastening sections are fastened in a formfitting manner and/or by a screw connection on the drive shaft, so that there is a connection between rotor blade and drive shaft on an axial end face of the blade fastening section. Intermediate elements having an elastic intermediate layer are between the blade fastening sections of adjacent rotor blades.

What is claimed is: 
     
         1 . A rotor assembly, comprising:
 a driveshaft having an assigned axis of rotation which establishes an axial direction and a circumferential direction, said driveshaft including an axial terminus face;   a rotor having a plurality of rotor blades each of which includes a profiled rotor blade section and a blade fastening section, each said profiled rotor blade section being configured for having an incident flow in said axial direction, each said blade fastening section including a first contact region and a second contact region, said first contact region being at least indirectly supported on said blade fastening section of a first adjacent one of said plurality of rotor blades, said second contact region being at least indirectly supported on said blade fastening section of a second adjacent one of said plurality of rotor blades, each said blade fastening section including an axial end face, each said blade fastening section being fastened at least one of in a formfitting manner and by way of a screw connection on said driveshaft so that there is a connection between a respective one of said plurality of rotor blades and said driveshaft on said axial end face of said blade fastening section, said axial end face being opposite to said axial terminus face on said driveshaft in an installed position, each said plurality of rotor blades including a transition from said profiled rotor blade section to said blade fastening section, said transition having an external contour which is free of a plurality of constrictions, said rotor including a plurality of intermediate elements having an elastic intermediate layer, said plurality of intermediate elements being between a plurality of said blade fastening section of adjacent ones of said plurality of rotor blades.   
     
     
         2 . The rotor assembly according to  claim 1 , wherein said rotor includes a segmented hub part, one of (a) said plurality of blade fastening sections and (b) an entirety of said plurality of blade fastening sections and said plurality of intermediate elements forming said segmented hub part of said rotor. 
     
     
         3 . The rotor assembly according to  claim 1 , wherein said first contact region and said second contact region are each detachably connected to said blade fastening section of an adjacent one of said plurality of rotor blades and thereby form a plurality of detachable connections which are implemented at least one of as a plurality of screw connections and as a plurality of formfitting connections. 
     
     
         4 . The rotor assembly according to  claim 1 , wherein said first contact region and said second contact region of each said blade fastening section are respectively arranged in an intermediate blade region of said rotor, said intermediate blade region having angular offset in said circumferential direction to a partition plane between adjacent ones of said plurality of rotor blades which is at most ±30°. 
     
     
         5 . The rotor assembly according to  claim 1 , wherein said plurality of intermediate elements of said rotor are a plurality of separate intermediate elements which are arranged spatially partitioned and which produce a detachable connection of adjacent ones of said plurality of blade fastening sections. 
     
     
         6 . The rotor assembly according to  claim 1 , wherein, for each of said plurality of rotor blades, an assigned said profiled rotor blade section and an assigned said blade fastening section are materially joined. 
     
     
         7 . The rotor assembly according to  claim 1 , wherein said profiled rotor blade section includes a first part and a second part, said first part of said profiled rotor blade section being formed by a blade stump, said blade stump being materially joined to each said blade fastening section, said second part of said profiled rotor blade section being detachably connected to said blade stump. 
     
     
         8 . The rotor assembly according to  claim 1 , wherein said rotor includes a central free region, said plurality of blade fastening sections enclosing said central free region of said rotor. 
     
     
         9 . The rotor assembly according to  claim 8 , wherein a contour of said central free region in a rotor plane deviates from a circular contour.