Design Features of High-Pressure Steam Turbines

Design Features of High-Pressure Steam Turbines 

Since for small- and medium-sized steam turbines with a power output up to approximately 700-800 MWei in particular of Japanese origin, a combined casing for both the HP and IP turbine stages can be found, for coal-flred power plants with a single unit output up to 1000-1100 MWei predominantly separate casings are utilized. For the H P turbine, almost aH turbine manufacturers apply a single-flow configuration. 

Because of the high pressure inside the steam turbine casing, a special shaft sealing arrangement must be applied between the outer casing and the turbine rotor. Typically, contactless and wear-free labyrinth seals are used, which have the 

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