Combustion chamber having a ceramic heat shield and seal

Abstract

A combustion chamber of a gas turbine having a peripheral support structure and a heat shield arranged therein. The support structure has a reduced cross-section on the downstream side and a stop element on the upstream side. There is a gap between the heat shield and the stop element to compensate for different strains and tolerances. For reduction of the cooling air consumption, a peripheral sealing groove which is open towards the heat shield and has a sealing element arranged therein is provided in the stop element, which sealing element rests against the heat shield and covers the gap.

1 . A combustion chamber comprising:
 a combustion chamber axis, having a peripheral support structure, said peripheral support structure having a cross-sectional reduction on the a downstream side and a stop element on an upstream side,   at least one ceramic heat shield, said ceramic heat shield being arranged within the peripheral support structure, on the a side facing the a combustion space, and a position of said ceramic heat shield being delimited in a direction of the combustion chamber axis by the cross-sectional reduction and the stop element, there being a gap between the ceramic heat shield and the stop element,   a peripheral seal groove which is open toward the ceramic heat shield and is arranged in the stop element, and   a sealing element, which bears against the ceramic heat shield and which covers the gap and is arranged in said peripheral seal groove, and   an elastically preloaded spring element, which acts on the sealing element and is arranged in the stop element.   
     
     
         2 . The combustion chamber as claimed in  claim 1 ,
 wherein the peripheral support structure has a tubular design.   
     
     
         3 . The combustion chamber as claimed in  claim 1 ,
 wherein the elastically preloaded spring element is arranged in the peripheral seal groove, between a groove bottom and the sealing element.   
     
     
         4 . The combustion chamber as claimed in  claim 1  of  claims 1 ,
 wherein the cross-sectional reduction is formed by a conical portion, an outer periphery of the ceramic heat shield being supported directly or indirectly on said cross-sectional reduction. 
 
     
     
         5 . The combustion chamber as claimed in  claim 1 ,
 wherein the ceramic heat shield is formed, in the direction of the combustion chamber axis, by at least two heat shield elements.   
     
     
         6 . The combustion chamber as claimed in  claim 1 ,
 wherein at least one heat shield element has a tubular design.   
     
     
         7 . The combustion chamber as claimed in  claim 1 ,
 wherein, at least in certain portions along the combustion chamber axis, the ceramic heat shield is formed, in a peripheral direction, by at least two heat shield elements.   
     
     
         8 . The combustion chamber as claimed in claim lone of  claims 1 ,
 wherein at least one radially acting tensioning element is arranged between the ceramic heat shield and the peripheral support structure.   
     
     
         9 . The combustion chamber as claimed in  claim 1 ,
 wherein the combustion chamber comprises a gas turbine combustion chamber.