A combustion chamber heat shield and seal assembly and a method of manufacturing a combustion chamber heat shield and seal assembly

摘要

A gas turbine engine 10 combustion chamber 15 heat shield and seal assembly 11 comprises a heat shield 56A, 56B and a seal 84. The heat shield has an aperture 60 and the seal is located in the aperture in the heat shield. The seal comprises an annular member having an upstream end 88, a middle 90 and a downstream end 92. The upstream end of the seal has a diameter greater than the diameter of the aperture, the middle has a diameter less than the diameter of the aperture and the downstream end of the seal has a diameter greater than the diameter of the aperture in the heat shield. Also disclosed is a method for making a seal in which metal is supplied into a mould. The metal may be a nickel, iron or cobalt base superalloy.