Flow Machine

Abstract

A flow machine includes two structural component parts that cooperate with one another by a bellows seal so that the bellows seal forms a medium barrier between two spaces of the flow machine which directly adjoin the two structural component parts. The flow machine is constructed as a gas turbine, and one space of the two spaces is a hot-gas space of a high-pressure stage of the gas turbine.

1 . A flow machine constructed as a gas turbine comprising:
 a first structural component part;   a second structural component part; and   a bellows seal by which the first and second structural parts cooperate with one another by so that the bellows seal forms a medium barrier between two spaces of the flow machine that directly adjoin the two structural component parts,   wherein one space of the two spaces is a hot-gas space of a high-pressure stage of the gas turbine.   
     
     
         2 . The flow machine according to  claim 1 , wherein the other space of the two spaces is a cooling air space of the high-pressure stage of the gas turbine. 
     
     
         3 . The flow machine according to  claim 2 , wherein the bellows seal comprises:
 a first end portion fastened to the first structural component part so that a deformation-tolerant connection is produced by which the bellows seal is sealed against the first structural component part;   a second end portion by which the bellows is sealed against the second structural component part.   
     
     
         4 . The flow machine according to  claim 3 , wherein the second end portion seals against the second structural component part by area contact based only on axial preloading. 
     
     
         5 . The flow machine according to  claim 4 , wherein the first end portion is at least one of is welded, soldered, screwed, and cemented to the first structural component part. 
     
     
         6 . The flow machine according to  claim 5 , wherein
 the first end portion is configured as a first flange that proceeds from an outer diameter of a fold part of the bellows seal and extends radially outward beyond the outer diameter of the fold part and rests on a first radially extending sealing surface of the first structural component part, and   the second end portion is configured as a second flange that proceeds from the outer diameter of the fold part and extends radially inward in an opposite direction to the first end portion and rests on a second radially extending sealing surface of the second structural component part.   
     
     
         7 . The flow machine according to  claim 6 , wherein the first end portion has an axially extending connection portion connected to the fold part by a material bond so that an intermediate space is formed between the fold part and the first sealing surface of the first structural component part. 
     
     
         8 . The flow machine according to  claim 7 , further comprising:
 a supporting surface that extends axially in a direction of the first structural component part that adjoins the second radially extending sealing surface to provide a radially inward support for the fold part.   
     
     
         9 . The flow machine according to  claim 8 , wherein the second radially extending sealing surface of the second structural component part, the supporting surface, and the sealing surface of the first structural component part each extend such that they form a receiving pocket for the fold part of the bellows seal. 
     
     
         10 . The flow machine according to  claim 9 , wherein the first structural component part is at least one of a stator blade carrier and a seal carrier of the high-pressure stage of the gas turbine. 
     
     
         11 . The flow machine according to  claim 1 , wherein the bellows seal comprises:
 a first end portion fastened to the first structural component part so that a deformation-tolerant connection is produced by which the bellows seal seals against the first structural component part, the first end portion; and   a second end portion by which it seals against the second structural component part.   
     
     
         12 . The flow machine according to  claim 3 , wherein the first end portion is at least one of is welded, soldered, screwed, and cemented to the first structural component part. 
     
     
         13 . The flow machine according to  claim 3 , wherein
 the first end portion is configured as a first flange that proceeds from an outer diameter of a fold part of the bellows seal and extends radially outward beyond the outer diameter of the fold part and rests on a radially extending sealing surface of the first structural component part, and   the second end portion is configured as a second flange that proceeds from the outer diameter of the fold part and extends radially inward in an opposite direction to the first end portion and rests on a radially extending sealing surface of the second structural component part.   
     
     
         14 . The flow machine according to  claim 6 , further comprising:
 a supporting surface that extends axially in a direction of the first structural component part that adjoins the second radially extending sealing surface to provide a radially inward support for the fold part.   
     
     
         15 . The flow machine according to  claim 3 , wherein the first structural component part is at least one of a stator blade carrier and a seal carrier of the high-pressure stage of the gas turbine.