SEAL DEVICE FOR STEAM TURBINE

PROBLEM TO BE SOLVED: To provide a seal device capable of preventing a multichip fin fitted into a nozzle diaphragm from falling out due to erosion from solid particles contained in steam.SOLUTION: At a portion with which solid particles of steam directly contact, provided is a separate structure us...

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Bibliographische Detailangaben
Hauptverfasser:	KAWAI TATSUHIKO, ABE TORU
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BLASTING CYLINDERS ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES PISTONS SEALINGS STEAM ENGINES THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a seal device capable of preventing a multichip fin fitted into a nozzle diaphragm from falling out due to erosion from solid particles contained in steam.SOLUTION: At a portion with which solid particles of steam directly contact, provided is a separate structure using a high-anticorrosion material or coating and capable of separately using a multichip fin depending on a high-corrosive range or a different material other than the range, and further provided is a structure where when a hook part of the multichip fin is worn, a return spring is installed in an axis direction, and thus, a ring is prevented from falling out by elastic force of the spring.SELECTED DRAWING: Figure 1 【課題】ノズルダイヤフラムに嵌めこまれて設けられるマルチチップフィンが、蒸気に含まれる固体粒子に侵食されて脱落するのを防ぐことのできるシール装置を提供することを目的とする。【解決手段】本実施形態では、蒸気の固体粒子が直接あたる該当部位に、耐食性の高い材料やコーティングの使用およびマルチチップフィンを侵食性の高い範囲と、それ以外で異なる材料とで使い分けた別体構造、さらにマルチチップフィンのかかり部が減耗した際に、戻りバネを軸方向に設置しておくことで、バネの弾性力によってリングが脱落しない構造を提供することにより上記目的を達成する。【選択図】図１