STEAM TURBINE AND ITS EXHAUST CHAMBER
To increase a pressure recovery amount by reducing pressure loss of steam in an exhaust chamber.SOLUTION: An exhaust chamber 25 includes a diffuser 26 forming a diffuser space 26s, an exhaust casing 30 forming an exhaust space 30s communicated with the diffuser space 26s, and an auxiliary exhaust fr...
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Zusammenfassung: | To increase a pressure recovery amount by reducing pressure loss of steam in an exhaust chamber.SOLUTION: An exhaust chamber 25 includes a diffuser 26 forming a diffuser space 26s, an exhaust casing 30 forming an exhaust space 30s communicated with the diffuser space 26s, and an auxiliary exhaust frame 40 forming an exhaust auxiliary space 40s having an annular shape on an axis Ar as a center at a radial inner side Dri with respect to the diffuser 26. The exhaust casing 30 has an exhaust portion 31 only at an exhaust side Dpe, of a non-exhaust side Dpu and the exhaust side Dpe opposed to each other in an orthogonal direction orthogonal to the axis Ar. The auxiliary exhaust frame 40 has an opening 41 opened toward a radial outer side Dro from the inside of the exhaust auxiliary space 40s at least at parts of the non-exhaust side Dpu and the exhaust side Dpe with respect to the axis Ar as a reference, and communicating the exhaust space 30s with the exhaust auxiliary space 40s.SELECTED DRAWING: Figure 2
【課題】排気室内での蒸気の圧力損失を低減させて、圧力回復量を大きくする。【解決手段】排気室25は、ディフューザ空間26sを形成するディフューザ26と、ディフューザ空間26sに連通する排気空間30sを形成する排気ケーシング30と、ディフューザ26よりも径方向内側Driで、軸線Arを中心として環状を成す排気補助空間40sを形成する補助排気枠40と、を備える。排気ケーシング30は、軸線Arに直交する直交方向で互いに相反する側をなす非排気側Dpuと排気側Dpeとのうち、排気側Dpeにのみ排気口31を有する。補助排気枠40は、軸線Arを基準にして、少なくとも非排気側Dpuと排気側Dpeとの部分で、排気補助空間40s内から径方向外側Droに向かって開口し、排気空間30sと排気補助空間40sとを連通される開口41を有する。【選択図】図2 |
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