Assembly group with a combustion chamber shingle for a gas turbine

Abstract

An assembly group for a combustion chamber of a gas turbine includes a combustion chamber shingle with a mounting element and a bolt formed as a separate structural component for supporting the combustion chamber shingle at a wall of the combustion chamber. The mounting element has a reception area into which a bolt head of the bolt is inserted transversely with respect to a longitudinal axis of the bolt and anchored therein in a form-fit manner. At the reception area, the mounting element forms an edge area that protrudes substantially radially with respect to the longitudinal axis of the bolt and that at least partially surrounds an edge of the bolt head. The edge of the bolt head does not extend exclusively in a plane that is perpendicular to the longitudinal axis of the bolt.

1 . Assembly group for a combustion chamber of a gas turbine, comprising:
 one combustion chamber shingle with a mounting element, and   at least one bolt formed as a separate structural component for mounting the combustion chamber shingle at a combustion chamber wall of the combustion chamber, wherein   the mounting element has a reception area into which a bolt head of the bolt is inserted transversely with respect to a longitudinal axis of the bolt and anchored therein in a form-fit manner,   at the reception area, the mounting element forms an edge area that protrudes substantially radially with respect to the longitudinal axis of the bolt and surrounds the edge of the bolt head at least partially, and   at its bottom side that is facing away from the combustion chamber shingle, the bolt head that is inserted into the reception area forms at least one contact surface for an abutting arrangement at the combustion chamber wall and/or at least one contact surface for an abutting arrangement at the edge area of the mounting element, with the contact surface extending in a tilted manner with respect to the longitudinal axis of the bolt.   
     
     
         2 . Assembly group according to  claim 1 , wherein at least one first edge section is formed at the edge of the bolt head, abutting at the radially protruding edge area, and at least one second edge section that is arranged at a distance to the first edge section is formed at the edge of the bolt head, abutting at the combustion chamber wall if the combustion chamber shingle is mounted thereat according to the intended use. 
     
     
         3 . Assembly group according to  claim 2 , wherein the edge area of the mounting element is embodied so as to not extend along the entire circumference of the longitudinal axis of the bolt and so as to be open towards at least one side, and in that the second edge section of the bolt head is present at this one side, so that the second section is not surrounded by the radially protruding edge area. 
     
     
         4 . Assembly group according to  claim 2 , wherein the bolt head is locally thickened at the second edge section in the axial direction with respect to the longitudinal axis of the bolt. 
     
     
         5 . Assembly group according to  claim 4 , wherein a locally thickened section has an extension in the axial direction that is increased by 15% and up to 100% as compared to adjoining sections of the bolt head. 
     
     
         6 . Assembly group according to  claim 4 , wherein a locally thickened section of the bolt head extends along a circumference with a length that corresponds to at most a ⅓ of the total circumference of the bolt head. 
     
     
         7 . Assembly group according to  claim 1 , wherein the bolt head is conically shaped at an edge section that is surrounded by the radially protruding edge area of the mounting element. 
     
     
         8 . Assembly group according to  claim 7 , wherein a conically shaped edge section of the bolt head becomes wider in the direction of a front side that is defined by the bolt head. 
     
     
         9 . Assembly group according to  claim 1 , wherein an edge section is formed at the bolt head, which at least in one area extends so as to be tilted at an angle (α 4 ) with respect to a connection direction along which the bolt head is inserted into the reception area of the mounting element of the combustion chamber shingle. 
     
     
         10 . Assembly group according to  claim 9 , wherein the radially protruding edge area of the mounting element defines a channel for inserting the bolt head that tapers off and extends along the connection direction, wherein the taper degree of the channel corresponds to the angle (α 4 ) at which the at least one area of the edge section extends in manner tilted with respect to the connection direction. 
     
     
         11 . Assembly group according to  claim 1 , wherein an edge section with a contact surface for abutting arrangement at the radially protruding edge area of the mounting element is formed at the bolt head, wherein the contact surface extends in a tilted manner with respect to a first spatial direction and the longitudinal axis of the bolt, as well as with respect to a second spatial direction that is perpendicular to the first spatial direction. 
     
     
         12 . Assembly group according to  claim 1 , wherein a conical transitional area is formed between a bolt shaft of the bolt by means of which the combustion chamber shingle is supported at the combustion chamber wall and the bolt head. 
     
     
         13 . Assembly group according to  claim 12 , wherein a lateral surface of the transitional area is concavely arched and has a radius of curvature that corresponds to the range of 1.0 to 3.5 times the diameter of the bolt shaft. 
     
     
         14 . Assembly group for a combustion chamber of a gas turbine, comprising:
 one combustion chamber shingle with a mounting element and   at least one bolt that serves for mounting the combustion chamber shingle at a combustion chamber wall of the combustion chamber and that is formed as a separate structural component,   wherein the bolt has a bolt shaft by means of which the combustion chamber shingle is supported at the combustion chamber wall, characterized in that   the mounting element has a reception area into which a bolt head of the bolt is inserted transversely with respect to a longitudinal axis of the bolt and anchored therein in a form-fit manner,   at the reception area, the mounting element forms an edge area that is substantially radially protruding with respect to the longitudinal axis of the bolt and that at least partially surrounds the edge of the bolt head,   the reception area has a basal plane, above which the radially protruding edge area extends, and the bolt head has a front side which is facing towards a basal plane and at which a concave internal arching is provided that is arranged centrally with respect to the bolt shaft,   in cross-section the concave internal arching has a radius of curvature that corresponds to at least a sixth of a mean width of the bolt head transversely with respect to the longitudinal axis of the bolt,   in cross-section the concave internal arching has a radius of curvature that corresponds to at least half the diameter of a bolt shaft of the bolt by which the combustion chamber shingle is supported at the combustion chamber wall.   
     
     
         15 . Assembly group according to  claim 14 , wherein in cross-section the internal arching is delimited by two convex bulges that protrude in the direction of the basal plane. 
     
     
         16 . Gas turbine engine with a combustion chamber that comprises at least one assembly group according to  claim 1 .