Guide blade arrangement for an axial turbo-machine

Abstract

A guide blade arrangement for an axial turbo-machine is provided. The guide blade arrangement includes at least one annular guide blade carrier and an inner ring arranged concentrically with respect to the guide blade carrier, between which guide blade carrier and inner ring a number of guide blades are arranged in a radial configuration. To obtain a low-wear and particularly durable fastening of the guide blade, which is supported by the guide blade carrier, to the inner ring, it is proposed that the guide blades are fastened resiliently to the inner ring. Here, the fastening is provided by means of a spring element. By means of the spring element, it is possible to ensure a uniform contact pressure of the guide blade head against the inner ring or if appropriate against a further spring element, such that occurring stresses and wear can be reduced.

1 .- 11 . (canceled) 
     
     
         12 . A stator blade arrangement for an axial turbomachine, comprising:
 an annular stator blade carrier;   an inner ring which is arranged concentrically to the stator blade carrier; and   a plurality of stator blades arranged between the annular stator blade carrier and the inner ring and arranged in a radial configuration,   wherein each stator blade comprises a blade airfoil and is fastened on the stator blade carrier,   wherein each stator blade comprises a stator blade tip, with a web and with a tip section which extends transversely to the web, and which projects into an encompassing slot of the inner ring, and the slot is closed off in each case by a shroud in a section between two adjacent stator blades,   wherein adjacent shrouds are at a distance from each other, forming a plurality of recesses which accommodate the plurality of webs, and   wherein the stator blade tip of at least one of the stator blades is spring-fastened on the inner ring by means of a spring element which is arranged in a side face of a respective recess which faces the web.   
     
     
         13 . The stator blade arrangement as claimed in  claim 12 , wherein the spring element abuts in a pretensioned manner against the inner ring and against the web of the respective stator blade. 
     
     
         14 . The stator blade arrangement as claimed in  claim 12 , wherein two spring elements, which are arranged on side faces of the recess which lie opposite each other, are provided for each stator blade. 
     
     
         15 . The stator blade arrangement as claimed in  claim 12 , wherein the spring element is formed as a tension sleeve. 
     
     
         16 . The stator blade arrangement as claimed in  claim 12 , wherein a pocket for accommodating the spring element, from which the spring element partially projects, is provided in the respective side faces. 
     
     
         17 . The stator blade arrangement as claimed in  claim 12 , wherein a spring force is oriented in a circumferential direction of the inner ring. 
     
     
         18 . The stator blade arrangement as claimed in  claim 12 , wherein the inner ring comprises two ring sections. 
     
     
         19 . The stator blade arrangement as claimed in  claim 12 , wherein the inner ring and the annular stator blade carrier comprises at least two ring segments. 
     
     
         20 . The stator blade arrangement as claimed in  claim 12 , wherein the inner ring or the annular stator blade carrier comprises at least two ring segments. 
     
     
         21 . The stator blade arrangement as claimed in  claim 12 , wherein the stator blade carrier is formed as a casing. 
     
     
         22 . A turbomachine, comprising:
 a stator blade arrangement, comprising:
 an annular stator blade carrier, 
 an inner ring which is arranged concentrically to the stator blade carrier, and 
 a plurality of stator blades arranged between the annular stator blade carrier and the inner ring and arranged in a radial configuration, 
   wherein each stator blade comprises a blade airfoil and is fastened on the stator blade carrier,   wherein each stator blade comprises a stator blade tip, with a web and with a tip section which extends transversely to the web, and which projects into an encompassing slot of the inner ring, and the slot is closed off in each case by a shroud in a section between two adjacent stator blades,   wherein adjacent shrouds are at a distance from each other, forming a plurality of recesses which accommodate the plurality of webs, and   wherein the stator blade tip of at least one of the stator blades is spring-fastened on the inner ring by means of a spring element which is arranged in a side face of a respective recess which faces the web.   
     
     
         23 . The turbomachine as claimed in  claim 22 , wherein the turbomachine is formed as an axial compressor or an axial turbine. 
     
     
         24 . The turbomachine as claimed in  claim 22 , wherein the spring element abuts in a pretensioned manner against the inner ring and against the web of the respective stator blade. 
     
     
         25 . The turbomachine as claimed in  claim 22 , wherein two spring elements, which are arranged on side faces of the recess which lie opposite each other, are provided for each stator blade. 
     
     
         26 . The turbomachine as claimed in  claim 22 , wherein the spring element is formed as a tension sleeve. 
     
     
         27 . The turbomachine as claimed in  claim 22 , wherein a pocket for accommodating the spring element, from which the spring element partially projects, is provided in the respective side faces. 
     
     
         28 . The turbomachine as claimed in  claim 22 , wherein a spring force is oriented in a circumferential direction of the inner ring. 
     
     
         29 . The turbomachine as claimed in  claim 22 , wherein the inner ring comprises two ring sections. 
     
     
         30 . The turbomachine as claimed in  claim 22 , wherein the inner ring and/or the annular stator blade carrier comprises at least two ring segments. 
     
     
         31 . The turbomachine as claimed in  claim 22 , wherein the stator blade carrier is formed as a casing.