Inflow segment for a turbomachine

Abstract

A turbomachine is provided having an inflow segment which carries an inflow segment vane and bores, a partial mass flow arriving through these bores at a relief space and leading to a cooling system.

1 - 8 . (canceled) 
     
     
         9 . A turbomachine, comprising
 a rotor mounted rotatably about an axis of rotation, with rotor blades arranged on the rotor,   a casing arranged about the rotor, with guide vanes attached inside the casing,   a flow duct formed between the rotor and the casing,   a supply line arranged in the casing and formed for supplying steam,   an inflow segment arranged in the casing,   inflow segment guide vanes arranged in the inflow segment, and   bores arranged in the inflow segment which establish a fluidic connection between the supply line and a relief space arranged between the inflow segment and the rotor,   wherein the bores are inclined, with respect to a radial direction through the axis of rotation, by an angle α of between 40° and 80°.   
     
     
         10 . The turbomachine as claimed in  claim 9 ,
 wherein the bores are formed such that part of the supply steam is fed through the bores and part of the supply steam is fed through the inflow segment guide vanes.   
     
     
         11 . The turbomachine as claimed in  claim 9 ,
 wherein the inflow segment has a hub-side ring segment in which are formed the bores.   
     
     
         12 . The turbomachine as claimed in  claim 9 ,
 wherein the bores are arranged upstream of the inflow segment guide vanes, as seen from the flow direction of the supply steam.   
     
     
         13 . The turbomachine as claimed in  claim 9 ,
 wherein six bores are formed.   
     
     
         14 . The turbomachine as claimed in  claim 9 ,
 wherein the casing is formed as an inner casing and an outer casing is arranged around the inner casing.   
     
     
         15 . The turbomachine as claimed in  claim 9 ,
 wherein the turbomachine is formed as a steam turbine.