Sealing arrangement, in particular for the blade segments of gas turbines

Abstract

In a sealing arrangement, in particular for the blade segments of gas turbines, two bodies, with two end faces which extend along a longitudinal axis, adjoin one another while forming a gap, the width of which can vary between zero and a maximum width. The gap is covered by a sealing strip which lies transversely to the gap, extends along the longitudinal axis and is mounted with clearance in two opposite grooves of a predetermined depth. In such a sealing arrangement, an increased maximum width of the gap is made possible by the sealing strip having a basic width transversely to the longitudinal axis, this basic width being less than or equal to twice the depth of the grooves, and by the sealing strip having additional means which prevent the sealing strip from slipping out of the grooves if the sum of the maximum width of the gap and the depth of the grooves is greater than or equal to the basic width of the sealing strip.

1 . A sealing arrangement, in particular for the blade segments of gas turbines, in which sealing arrangement two bodies with two end faces which extend along a longitudinal axis, adjoin one another while forming a gap, a width of which can vary between zero and a maximum width (X), and in which the gap is covered by a sealing strip which lies transversely to the gap, extends along the longitudinal axis and is mounted with clearance in two opposite grooves of a predetermined depth (T) which are incorporated transversely to the gap in the end faces of the bodies wherein the sealing strip has a basic width (S) transversely to the longitudinal axis, this basic width (S) being less than or equal to twice the depth of the grooves, and wherein the sealing strip has additional means which prevent the sealing strip from slipping out of the grooves if the sum of the maximum width (X) of the gap and the depth (T) of the grooves is greater than or equal to the basic width (S) of the sealing strip.  
   
   
       2 . The sealing arrangement as claimed in  claim 1 , wherein the additional means comprise lugs which are arranged in a distributed manner on the longitudinal sides of the sealing strip, are defined in the direction of the longitudinal axis and locally increase the width of the sealing strip beyond the basic width (S) by a predetermined additional width (S 1 , S 2 ).  
   
   
       3 . The sealing arrangement as claimed in  claim 2 , wherein at least two lugs are arranged on a longitudinal side of the sealing strip in such a way as to be distributed over the longitudinal side.  
   
   
       4 . The sealing arrangement as claimed in  claim 3 , wherein the at least two lugs are arranged on the ends of the longitudinal side.  
   
   
       5 . The sealing arrangement as claimed in  claim 4 , wherein at least one additional lug is arranged in the center between the at least two lugs.  
   
   
       6 . The sealing arrangement as claimed in  claim 2  wherein the lugs are arranged in pairs opposite one another on the two longitudinal sides of the sealing strip.  
   
   
       7 . The sealing arrangement as claimed in  claim 2  wherein the lugs are integrally formed on the sealing strip and have the same width as the sealing strip.  
   
   
       8 . The sealing arrangement as claimed in  claim 2  wherein the lugs lie in the plane of the sealing strip in the initial state.  
   
   
       9 . The sealing arrangement as claimed in  claim 2  wherein the lugs are bent out of the plane of the sealing strip in the initial state.  
   
   
       10 . The sealing arrangement as claimed in  claim 2  wherein in order to accommodate the lugs, deeper pockets are formed at the corresponding locations of the grooves.  
   
   
       11 . The sealing arrangement as claimed in  claim 1  wherein the walls of the grooves are oriented perpendicularly to the gap.  
   
   
       12 . The sealing arrangement as claimed in  claim 1  wherein the walls of the grooves are oriented obliquely relative to the gap on one side or on both sides in such a way that the grooves have a V-shaped cross-sectional profile.  
   
   
       13 . The sealing arrangement as claimed in  claim 1  wherein the grooves and the sealing strip are of flat design.  
   
   
       14 . The sealing arrangement as claimed in  claim 1  wherein the grooves and the sealing strip are of bent design.  
   
   
       15 . The sealing arrangement as claimed in  claim 1  wherein the bodies are guide blade segments and/or moving blade segments of a gas turbine.