Rotor for an axial flow turbomachine and double nut for connecting two tie-rod elements

Abstract

A rotor for an axial flow turbomachine is provided, having a number of a plurality of disc-shaped or drum-shaped rotor components and at least one pin-shaped tie-rod extending through the rotor components, wherein a counter-bearing is screwed onto each of the projecting ends of the tie-rod for axially bracing the rotor components arranged therebetween. The tie-rod has at least two axially adjacent tie-rod elements which are each connected to one another in a detachable manner by connector. Elastic stretching characteristics of the two tie-rod elements are matched to each other such that, with the rotor components being clamped between the two counter-bearings, a clamping of the counter-bearing and the connection element and the rotor components arranged therebetween is at least partially released.

1 - 13 . (canceled) 
     
     
         14 . A rotor for an axial flow turbomachine, comprising
 a number of multiple disk-shaped or drum-shaped rotor components,   at least one tie-rod extending through the rotor components, with a counter-bearing being screwed onto each of the projecting ends of this tie-rod in order to axially clamp the rotor components arranged therebetween,   wherein the tie-rod comprises at least two axially adjacent tie-rod elements which are in each case releasably connected to one another by a connector,   wherein elastic stretching characteristics of the two tie-rod elements are matched to each other such that, with the rotor components being clamped between the two counter-bearings, a clamping of the counter-bearing and the connector and the rotor components arranged therebetween is at least partially released.   
     
     
         15 . The rotor as claimed in  claim 14 ,
 wherein the rotor comprises, along its longitudinal extent, a first rotor end section, at least a further rotor section and a second rotor end section,   wherein the connector, as seen axially, is arranged in one of the further rotor sections.   
     
     
         16 . The rotor as claimed in  claim 14 ,
 wherein the connector comprises screw nuts into which are screwed the mutually opposing ends of axially adjacent tie-rod elements.   
     
     
         17 . The rotor as claimed in  claim 16 ,
 wherein the screw nut comprises a double nut which has, centrally between the two screw openings, an inward-oriented ring.   
     
     
         18 . The rotor as claimed in  claim 15 ,
 wherein the connector and one of the rotor components are designed such that, after the counter-bearing arranged on the second rotor end section has been released, the connector adjacent to the second rotor end section, with the counter-bearing arranged on the first rotor end section, clamps together the rotor components arranged therebetween.   
     
     
         19 . The rotor as claimed in  claim 14 ,
 wherein the rotor comprises rotor end sections,   wherein respective connectors have multiple openings for guiding a fluid from one of the rotor end sections through to another of the rotor end sections.   
     
     
         20 . The rotor as claimed in  claim 19 ,
 wherein the respective connectors have a circumferential shaft collar which is arranged on the circumference and in which are arranged the openings as throughflow openings.   
     
     
         21 . The rotor as claimed in  claim 14 ,
 wherein respective connectors bear radially against at least one of the rotor components.   
     
     
         22 . The rotor as claimed in  claim 15 , wherein
 the rotor comprises a gas turbine rotor,   the first rotor end section comprises a compressor rotor,   the further rotor section comprises a central rotor section and   the second rotor end section comprises a turbine rotor.   
     
     
         23 . The rotor as claimed in  claim 21 ,
 wherein the central rotor section is formed from a hollow shaft or multiple bladeless rotor disks and rotor end sections of the rotor are formed from rotor disks.   
     
     
         24 . A double nut for connecting two tie-rod elements of an axial flow turbomachine, which has, centrally between the two screw openings, an inward-oriented ring or a separating web, the double nut comprising
 a circumferential shaft collar on its outer circumference centrally between the two screw openings.   
     
     
         25 . The double nut as claimed in  claim 24 ,
 wherein a number of axial throughflow openings is provided in the shaft collar.   
     
     
         26 . The rotor as claimed in  claim 14 ,
 wherein the clamping of the counter-bearing and the connector and the rotor components arranged therebetween is entirely released.