Method for assembling and disassembling a rotor having a number of rotor components of an axial flow turbomachine and such a rotor

Abstract

A method for assembling and disassembling a rotor having a number of rotor components of an axial flow turbomachine and such a rotor is provided. The rotor has 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 said tie-rod for axially bracing the rotor components arranged therebetween. In order to achieve shorter service intervals, a connector is screwed onto the tie-rod between both counter-bearings, wherein, after the release of one of the two counter-bearings, the rotor components arranged between the connector and the other of the two counter-bearings are braced with each other by the connector.

1 . A method for assembling a rotor, comprising a number of rotor components, of an axial flow turbomachine, in which first disk-shaped or drum-shaped rotor components in a first rotor section are clamped between a first counter-bearing and a connector by screwing the first counter-bearing and the connector onto a tie-rod, the method comprising:
 clamping the first and the second rotor components in a second rotor section between the first counter-bearing and a second counter-bearing by screwing the second counter-bearing onto the tie-rod,   wherein, during clamping of the second rotor section, the clamping of the connector is released.   
     
     
         2 . A method for partially dismantling a rotor, comprising clamped disk-shaped or drum-shaped rotor components, of an axial flow turbomachine, the method comprising
 when releasing a clamping of a second rotor section with second disk-shaped rotor components by releasing a second counter-bearing screwed onto a tie-rod, first rotor components of a first rotor section are clamped between a first counter-bearing and a connector screwed onto the tie-rod.   
     
     
         3 . A rotor for an axial flow turbomachine, comprising
 a number of 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 a connector is screwed onto the tie-rod between the two counter-bearings, which connector, in the case of rotor components clamped by the two counter-bearings, participates only slightly or not at all in clamping the rotor components, and   wherein once one of the two counter-bearings has been released, those rotor Components arranged between the connector and the other of the two counter-bearings are clamped by the connector and the other counter-bearing.   
     
     
         4 . The rotor as claimed in  claim 3 ,
 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.   
     
     
         5 . The rotor as claimed in  claim 3 ,
 wherein the connector comprises a screw nut.   
     
     
         6 . The rotor as claimed in  claim 4 ,
 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.   
     
     
         7 . The rotor as claimed in  claim 4 ,
 wherein the respective connector has multiple openings for guiding a fluid from one of the rotor sections through to another of the rotor end sections.   
     
     
         8 . The rotor as claimed in  claim 7 ,
 wherein the respective connector has a circumferential shaft collar which is arranged on the circumference and in which are arranged the openings as throughflow openings.   
     
     
         9 . The rotor as claimed in  claim 3 ,
 wherein the respective connector bears radially against at least one of the rotor components.   
     
     
         10 . The rotor as claimed in  claim 4 , 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.   
     
     
         11 . The rotor as claimed in  claim 10 ,
 wherein the central rotor section is formed from a hollow shaft or multiple bladeless rotor disks and the rotor end sections are formed from rotor disks.