Patent ID: 8701417

Claim:
A head part of an annular combustion chamber for a gas turbine, the head part comprising: an end wall comprising a perimeter wall defining a passage opening for accommodating a burner, the end wall comprising a set back portion adjacent to the passage opening, the set back portion extends inward of the perimeter wall; a heat shield covering a back side of the end wall which faces towards the combustion chamber, the heat shield comprising a protruding portion shaped to cooperate with the set back portion of the end wall; and a burner collar adapted to fit within the passage opening and receive the burner, the burner collar comprising a protruding portion radially protruding from an outer surface of the burner collar, wherein: the head part of the annular combustion chamber is configured such that in an installed configuration (1) the protruding portion of the heat shield directly engages with the perimeter wall of the end wall, and (2) the protruding portion of the burner collar is held between the protruding portion of the heat shield and the set back portion of the end wall.