Rotor for a turbomachine

Abstract

A rotor for a turbomachine is provided. The rotor includes a shaft and a longitudinal bearing disk arranged thereon as an element for an axial bearing for axially supporting the shaft. The longitudinal bearing disk includes first and second contact surfaces. The first contact surface is cylindrical for radial support on the shaft. The second contact surface is conical for self-centering on the shaft. Advantageously, such a rotor may be used for operation with chemically aggressive gases and can be operated at substantially high rotational speeds.

1 - 14 . (canceled) 
     
     
         15 . A rotor for a turbomachine, comprising:
 a shaft, and   a longitudinal bearing disk arranged on said shaft as an element for an axial bearing for axially bearing the shaft, the longitudinal bearing disk comprising:
 a first, cylindrical contact face for radial mounting on the shaft, and 
 a second, conical contact face for automatic centering on the shaft. 
   
     
     
         16 . The rotor as claimed in  claim 15 , wherein the second contact face is conical in an offset manner relative to radial compression of the longitudinal bearing disk. 
     
     
         17 . The rotor as claimed in  claim 15 , wherein the second bearing face has an angle of inclination relative to the radial direction of the shaft of between 5° and 30°. 
     
     
         18 . The rotor as claimed in  claim 15 , wherein the longitudinal bearing disk is mounted such that an increasing bearing force acts on the second contact face as the rotation speed increases. 
     
     
         19 . The rotor as claimed in  claim 15 , wherein the longitudinal bearing disk is mounted on the shaft without stress by way of the first contact face. 
     
     
         20 . The rotor as claimed in  claim 15 , wherein the second contact face rests on a conical mating face which is formed in the shaft. 
     
     
         21 . The rotor as claimed in  claim 15 , wherein the second contact face is an end face of the longitudinal bearing disk. 
     
     
         22 . The rotor as claimed in  claim 15 , wherein the second contact face is provided for transferring at least the major portion of the tangential forces from the shaft to the longitudinal bearing disk. 
     
     
         23 . The rotor as claimed in  claim 15 , further comprising a rotation-prevention device for holding the longitudinal bearing disk in a desired tangential position by a positive-locking connection. 
     
     
         24 . The rotor as claimed in  claim 23 , wherein a positive-locking element of the rotation-prevention device engages in an end face of the longitudinal bearing disk. 
     
     
         25 . The rotor as claimed in  claim 24 , wherein the end face is arranged opposite the second contact face. 
     
     
         26 . The rotor as claimed in  claim 23 , wherein the rotation-prevention device has a rotation-prevention ring which at least indirectly forms a positive-locking connection with the longitudinal bearing disk along a direction, and forms at least an indirect positive-locking connection with the shaft in the same direction. 
     
     
         27 . The rotor as claimed in  claim 15 , further comprising a spring element for absorbing bearing forces on the second contact face. 
     
     
         28 . The rotor as claimed in  claim 27 , wherein the spring element obtains its spring action by a recess which is compressed in the event of a springing operation.