| 摘要 |
PURPOSE:To improve heat insulating efficiency and nozzle cooling efficiency by constructing a cover body which covers the top of a combustor body, with a cover in which a heat reflecting board is embedded in a heat insulating material, and a second cover which is provided apart from, and opposite to, said cover, and providing a fuel injection nozzle passing through both of the covers. CONSTITUTION:In the captioned combustor, a combustion chamber 2, etc. is provided in a combustor body and a cover body 9 which has a fuel injection nozzle 8 in its center, is fixed to its upper part, while a preheating air chamber 12 is formed between a upper partition board 11 having a swirler 10 and the cover body 9. In this case, the cover body 9 consists of a first and a second covers 13, 19. The first cover 13 is formed by providing a heat insulating material 16 between a pair of reflecting boards 14, 15, and embedding a reflecting board 17 in the heat insulating board 16. The second cover 19 is provided apart from the cover 13, and a bracket 21 which forms a vacant space 20 into which a cooling air is fed through a pipe 24, is provided on the top wall in the center of the second cover 19, and the fuel injection nozzle 8 is provided in a pipe 23 which passes through these covers 13, 19. |
