COOLING STRUCTURE OF GAS TURBINE ENGINE

PROBLEM TO BE SOLVED: To surely supply cooling air from a cooling hole formed on a nozzle guide, while reducing a weight by lowering a height in an axial direction, of a fuel nozzle of an opening flange portion.SOLUTION: An opening flange portion 14 surrounding a fuel supply hole 13a formed on a com...

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Hauptverfasser: KAMOI YASUHARU, KATO DAISUKE
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To surely supply cooling air from a cooling hole formed on a nozzle guide, while reducing a weight by lowering a height in an axial direction, of a fuel nozzle of an opening flange portion.SOLUTION: An opening flange portion 14 surrounding a fuel supply hole 13a formed on a combustor 11 includes a conical portion 14a conically expanded toward an outer side of the combustor 11, and a flat portion 14b extended into the flat plate shape from a tip of the conical portion 14a toward a radial outer side. A nozzle guide 22 includes a cylindrical portion 22a covering an outer periphery of a fuel nozzle 15 for supplying a fuel to the fuel supply hole 13a, and a bottom flange portion 22c bent from a corner portion 22b at a tip of the cylindrical portion 22a to a radial outer side and supported by the flat portion 14b in a floating state. A cooling hole 22d for supplying the air for cooling the opening flange portion 14 and the fuel nozzle 15 is formed on the corner portion 22b of the nozzle guide 22, and a direction of the cooling hole 22d is inclined toward an axis L of the fuel nozzle 15.SELECTED DRAWING: Figure 2 【課題】 開口フランジ部の燃料ノズルの軸線方向の高さを低くして軽量化を図りながら、ノズルガイドに形成した冷却孔から冷却用の空気を確実に供給できるようにする。【解決手段】 燃焼器11に形成された燃料供給孔13aを取り囲む開口フランジ部14は、燃焼器11の外側に向けて円錐状に拡開する円錐部14aと、円錐部14aの先端から径方向外側に向けて平板状に延びる平坦部14bとを備え、ノズルガイド22は、燃料供給孔13aに燃料を供給する燃料ノズル15の外周を覆う円筒部22aと、円筒部22aの先端のコーナー部22bから径方向外側に折れ曲がって平坦部14bに浮動状態で支持される底フランジ部22cとを備える。開口フランジ部14および燃料ノズル15を冷却する空気を供給する冷却孔22dがノズルガイド22のコーナー部22bに形成され、冷却孔22dの方向は燃料ノズル15の軸線Lに向かって傾斜する。【選択図】 図2