The turbo engine comprises of at least two welded discs (1) on its outer wall (5). The discs in their welded position, are bordered by a first peripherally extending cavity (7). There is a further cavity (8) arranged centrally about the longitudinal axis (9) of the rotor for supply of flowing gas media (12). The first and other cavities are connected to one another. The first cavity has numerous regularly divided radial ribs (10,10'). There are channels (11) stemming from a outer chamber to the outer wall of the discs. The channels may be radially inclined.
