Turbo engine with torsional coupling integrated to at least one driving or driven shaft driving

Abstract

A turbo engine comprises a driving shaft and a driven shaft actuated by the driving shaft being coupdriven to this driving shaft by means of a torsional coupling. The torsional coupling is integrated at least into one of the driven and driving shafts comprising a zone that is rotationally flexible, in such a way as to constitute the torsional coupling.

What is claimed is: 
     
         1 . A turbo engine, comprising a driving shaft and a driven shaft actuated by the driving shaft, which is coupled to this driving shaft by means of a torsional coupling, characterized in that the torsional coupling is integrated in at least one of the driven and driving shafts which comprises a zone that is flexible in rotation, in a manner to constitute the torsional coupling. 
     
     
         2 . A turbo engine according to  claim 1 , wherein the shaft, into which the torsional coupling is integrated, additionally comprises an external peripheral zone, which constitutes a means of support to the functions carried out by the rotor. 
     
     
         3 . A turbo engine according to  claim 1 , wherein the flexible zone comprises a cylindrical part with a diameter that is smaller than the rest of the shaft into which the flexible coupling is integrated. 
     
     
         4 . A turbo engine according to  claim 3 , wherein the length of the cylindrical part is selected in relation to the diameter in such a way as to confer a torsional character to the coupling. 
     
     
         5 . A turbo engine according to  claim 3 , wherein the cylindrical part is mounted in the driven shaft or in the driving shaft. 
     
     
         6 . A turbo engine according to  claim 4 , wherein the cylindrical part is mounted in the driven shaft and in the driving shaft. 
     
     
         7 . A turbo engine according to  claim 3 , wherein the torsional cylindrical part is entirely in projection starting from the shaft into which the coupling is integrated. 
     
     
         8 . A turbo engine according to  claim 3 , wherein the torsional cylindrical part is partially or completely located inside a hollow part. 
     
     
         9 . A turbo engine according to  claim 1 , wherein at least one of the driven and driving shafts comprises in its torsional coupling zone an axial cylindrical throat delimiting in the shaft an internal shaft, which is coupled to the other driving or driven shaft, and an external shaft. 
     
     
         10 . A turbo engine according to  claim 9 , wherein the axial cylindrical throat is formed by means of electroerosion. 
     
     
         11 . A turbo engine according to  claim 1 , wherein at least one of the driven and driving shafts comprises in its torsional coupling zone an axial cylindrical throat delimited by an internal shaft and an external shaft assembled around the internal shaft. 
     
     
         12 . A turbo engine according to,  claim 9 , wherein the external shaft constitutes the means of support for the functions carried out by the rotor. 
     
     
         13 . A turbo engine according to  claim 9 , wherein the external shaft is extended as far as the zone of the connection of the driving and driven shafts. 
     
     
         14 . A turbo engine according to  claim 1 , wherein a free end of the shaft, into which the torsional coupling is integrated, has a diameter that is greater than that of its median part and forms a coupling zone of the internal shaft with the other driving or driven shaft. 
     
     
         15 . A turbo engine according to  claim 14 , wherein the free end of the shaft, into which the torsional coupling is integrated, has a diameter that is smaller than that of the coupling zone corresponding to the other driving or driven shaft, with which it is coupled and in which a flange ensures the coupling of the shafts.