Combustion chamber assembly comprising thermal shield and burner gasket as well as manufacturing method

Abstract

A combustion chamber assembly group includes a burner seal with a bearing section that extends along a longitudinal axis and has a passage hole for positioning a fuel nozzle at a combustion chamber of an engine, and a heat shield which, when mounted according to the intended use at the combustion chamber of the engine, is located inside the combustion space of the combustion chamber and has a passage hole through which the bearing section of the burner seal extends. The burner seal that is manufactured in an additive manner and the heat shield form a constructional unit in which the heat shield is received at least partially between a radially outwardly pointing opening edge of the burner seal and a radially outwardly extending web of the burner seal, so that any separation of the heat shield from the burner seal along the longitudinal axis is excluded.

1 . Combustion chamber assembly group, comprising
 a burner seal ( 4 ) with a bearing section ( 41 ) that extends along a longitudinal axis (L) and has a passage hole ( 400 ) for positioning a fuel nozzle ( 17 ) at a combustion chamber (BK) of an engine (T), wherein   (a) at an end of the passage hole ( 400 ), the bearing section ( 41 ) has an opening edge ( 40 ) which points radially outward with respect to the longitudinal axis (L) and which, when mounted according to the intended use at the combustion chamber (BK) of the engine (T), is located inside a combustion space ( 23 ) of the combustion chamber (BK), and   (b) at least one web ( 42 ) that extends radially outwards with respect to the longitudinal axis (L) is formed at the bearing section ( 41 ),   and   a heat shield ( 2 ) which, when mounted according to the intended use at the combustion chamber (BK) of the engine (T), is located inside the combustion space ( 23 ) of the combustion chamber (BK) and has a passage hole ( 26 ) through which the bearing section ( 41 ) of the burner seal ( 4 ) extends,   
       characterized in that 
       the burner seal ( 4 ) and the heat shield ( 2 ) form a constructional unit in which the heat shield ( 2 ) is at least partially received between the radially outward pointing opening edge ( 40 ) and the at least one radially outwardly extending web ( 42 ), so that any separation of the heat shield ( 2 ) from the burner seal ( 4 ) along the longitudinal axis (L) is excluded. 
     
     
         2 . Combustion chamber assembly group according to  claim 1 , characterized in that the constructional unit of burner seal ( 4 ) and heat shield ( 2 ) are manufactured in an additive manner. 
     
     
         3 . Combustion chamber assembly group according to  claim 1  or  2 , characterized in that the burner seal ( 4 ) is floatingly mounted at the heat shield ( 2 ). 
     
     
         4 . Combustion chamber assembly group according to any of the  claims 1  to  3 , characterized in that, due to the radially outwardly pointing opening edge ( 40 ), the passage hole ( 400 ) of the burner seal ( 4 ) has a diameter (D O ) at its end that is located inside the combustion space ( 23 ) which is larger than a diameter (D) of the passage hole ( 26 ) in the heat shield ( 2 ). 
     
     
         5 . Combustion chamber assembly group according to any of the preceding claims, characterized in that the opening edge ( 40 ) extends radially outwards up to the height of a radially outermost edge ( 2   b ) of the heat shield ( 2 ) or beyond this radially outer edge ( 25   ba ) of the heat shield ( 2 ), so that, when viewed from the combustion space ( 23 ) along the longitudinal axis (L), the opening edge ( 40 ) completely covers the heat shield ( 2 ). 
     
     
         6 . Combustion chamber assembly group according to any of the preceding claims, characterized in that the opening edge ( 40 ) extends at an opening angle (a) in the range of approximately 20° to 50° with respect to the longitudinal axis (L). 
     
     
         7 . Combustion chamber assembly group according to any of the preceding claims, characterized in that the heat shield ( 2 ) forms an embracing section ( 2   c ) that engages around the at least one radially outwardly extending web ( 42 ) of the burner seal ( 4 ). 
     
     
         8 . Combustion chamber assembly group according to  claim 7 , characterized in that the embracing section ( 2   c ) defines a gap ( 200 ) inside of which the at least one radially outwardly extending web ( 42 ) is at least partially received. 
     
     
         9 . Combustion chamber assembly group according to any of the preceding claims, characterized in that the constructional unit of burner seal ( 4 ) and heat shield ( 2 ) is affixed via the heat shield ( 2 ) at a combustion chamber component ( 5 ) that borders the combustion space ( 23 ). 
     
     
         10 . Combustion chamber assembly group according to  claim 9 , characterized in that attachment elements ( 17 ) which are passed through attachment openings at the combustion chamber component ( 5 ) are formed for affixing the constructional unit of burner seal ( 4 ) and heat shield ( 2 ) at the heat shield ( 2 ). 
     
     
         11 . Combustion chamber assembly group according to any of the  claims 7  and  8  and according to any of the  claims 9  and  10 , characterized in that a face side of the embracing section ( 2   c ) is facing towards the combustion chamber component ( 5 ). 
     
     
         12 . Combustion chamber assembly group according to  claim 9  or  10 , characterized in that the combustion chamber assembly group comprises at least one separate positioning part ( 24 ) that is arranged between the radially outwardly extending web ( 42 ) of the burner seal ( 4 ) and a section of the combustion chamber component ( 5 ). 
     
     
         13 . Combustion chamber assembly group according to any of the  claims 9  to  11 , characterized in that only the heat shield ( 2 ) is used for positioning the burner seal ( 4 ) at the combustion chamber component ( 5 ) and for abutment at the combustion chamber component ( 5 ). 
     
     
         14 . Combustion chamber assembly group according to any of the preceding claims, characterized in that the opening edge ( 40 ) is formed to be symmetrical with respect to the longitudinal axis (L). 
     
     
         15 . Combustion chamber assembly group according to any of the  claims 1  to  13 , characterized in that the opening edge ( 40 ) is formed to be asymmetrical with respect to the longitudinal axis (L). 
     
     
         16 . Combustion chamber assembly group according to any of the preceding claims, characterized in that the heat shield ( 2 ) and/or the burner seal ( 4 ) have at least one cooling air hole ( 14 ) and/or at least one cooling rib or cooling nub ( 29 ). 
     
     
         17 . Combustion chamber assembly group according to any of the preceding claims, characterized in that the combustion chamber assembly group comprises at least two burner seals ( 4 ) and the heat shield ( 2 ) has at least two passage holes ( 26 ) through which respectively one bearing section ( 41 ) of one of the at least two burner seals ( 4 ) extends. 
     
     
         18 . Engine with at least one combustion chamber assembly group according to any of the  claims 1  to  17 . 
     
     
         19 . Method for manufacturing a combustion chamber assembly group comprising a burner seal ( 4 ) with a bearing section ( 41 ) that extends along a longitudinal axis (L) and that has a passage hole ( 400 ) for positioning a fuel nozzle ( 17 ) at a combustion chamber (BK) of an engine (T), and a heat shield ( 2 ) which, when mounted according to the intended use at the combustion chamber (BK) of the engine (T), is located inside the combustion space ( 23 ) of the combustion chamber (BK) and has a passage hole ( 26 ) through which the bearing section ( 41 ) of the burner seal ( 4 ) extends, 
       characterized in that 
       the burner seal ( 4 ) and the heat shield ( 2 ) are manufactured in an additive manner as a constructional unit in which the burner seal ( 4 ) and the heat shield ( 2 ) cannot be separated from each other in a non-destructive manner. 
     
     
         20 . Method according to  claim 19 , characterized in that the burner seal ( 4 ) and the heat shield ( 2 ) are manufactured in an additive manner in such a way that the heat shield ( 2 ) is at least partially received at the constructional unit between (a) an opening edge ( 40 ) of the passage hole ( 400 ) that is formed by the burner seal ( 4 ) and that points radially outward with respect to the longitudinal axis (L) and (b) at least one web ( 42 ) that is formed by the burner seal ( 4 ) and also extends radially outwards with respect to the longitudinal axis (L). 
     
     
         21 . Method according to  claim 19  or  20 , characterized in that the burner seal ( 4 ) and the heat shield ( 2 ) are manufactured in an additive manner in such a way that, at the finished constructional unit, the heat shield ( 2 ) and the burner seal ( 2 ) are axially displaceable with respect to each other with regard to the longitudinal axis (L).