Axial-radial turbomachine

Abstract

Axial-radial flow machine having an axial portion with at least one axial stage, a radial portion with at least one radial stage, a housing having an interior space with a dividing wall extending in a radial direction dividing the housing in an axial direction into a first partial space in which the axial portion is received and a second partial space in which the radial portion is received, and a shaft that extends in axial direction through the interior space and through the dividing wall and on which impellers of the axial portion and of the radial portion are received. A radial gap is formed between the dividing wall and a fluid guiding element of the radial portion. The fluid guiding element is axially fixed to the housing so as to be adjacent to the dividing wall. A plurality of fixing units which are distributed in circumferential direction are arranged in the radial gap, each of which fixing units axially fixes the dividing wall to the fluid guiding element.

1 - 6 . (canceled) 
     
     
         7 . Axial-radial flow machine comprising:
 an axial portion having at least one axial stage;   a radial portion having at least one radial stage;   a housing having an interior space;   a dividing wall arranged in the housing that extends in a radial direction of the housing that divides the housing in an axial direction into a first partial space in which the axial portion is received and a second partial space in which the radial portion is received;   a shaft that extends in axial direction through the interior space of the housing and the dividing wall on which respective impellers of the axial portion and of the radial portion are received; and   a fluid guiding element of the radial portion, which is axially fixed to the housing so as to be adjacent to the dividing wall, wherein a radial gap is formed between the dividing wall and the fluid guiding element of the radial portion; and   a plurality of fixing units distributed in circumferential direction of the housing and arranged in the radial gap, each of the plural fixing units axially fixing the dividing wall to the fluid guiding element.   
     
     
         8 . The axial-radial flow machine according to  claim 7 , wherein the plural fixing units each have a projection arranged at one of the dividing wall and at the fluid guiding element that bridges the radial gap in the axial direction of the housing. 
     
     
         9 . The axial-radial flow machine according to  claim 7 , wherein the plural fixing units are each configured as a threaded bolt extending in the axial direction of the housing through the dividing wall and the fluid guiding element, each threaded bolt threadedly engages with at least one of the dividing wall and the fluid guiding element. 
     
     
         10 . The axial-radial flow machine according to  claim 9 , wherein the plural fixing units each have a spacer sleeve arranged in the radial gap on the threaded bolt that bridges the radial gap in the axial direction of the housing. 
     
     
         11 . The axial-radial flow machine according to  claim 9 , wherein each threaded bolt is formed by a threaded screw having a shank portion provided with an external thread and a head portion formed so as to be larger than the shank portion, wherein each threaded bolt is inserted through a through-passage in the dividing wall proceeding from the first partial space so that the head portion is supported at the dividing wall on the side of the first partial space and the external thread of the shank portion engages with an internal thread in the fluid guiding element. 
     
     
         12 . The axial-radial flow machine according to  claim 7 , wherein the axial-radial flow machine is formed by an axial-radial compressor. 
     
     
         13 . The axial-radial flow machine according to  claim 8 , wherein the plural fixing units are each configured as a threaded bolt extending in the axial direction of the housing through the dividing wall and the fluid guiding element, each threaded bolt threadedly engages with at least one of the dividing wall and the fluid guiding element. 
     
     
         14 . The axial-radial flow machine according to  claim 13 , wherein the plural fixing units each have a spacer sleeve arranged in the radial gap on the threaded bolt that bridges the radial gap in the axial direction of the housing. 
     
     
         15 . The axial-radial flow machine according to  claim 14 , wherein each threaded bolt is formed by a threaded screw having a shank portion provided with an external thread and a head portion formed so as to be larger than the shank portion, wherein each threaded bolt is inserted through a through-passage in the dividing wall proceeding from the first partial space so that the head portion is supported at the dividing wall on the side of the first partial space and the external thread of the shank portion engages with an internal thread in the fluid guiding element. 
     
     
         16 . The axial-radial flow machine according to  claim 7 , wherein a external diameter of the axial-radial flow machine is about 4000 mm and a wall thickness of the dividing wall is less than about 500 mm. 
     
     
         17 . The axial-radial flow machine according to  claim 7 , wherein the dividing wall is about 250 mm.