Steam turbine and method for operation of a steam turbine

US8202037B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Frank Deidewig · Neunburg vorm Wald, DE
• Yevgen Kostenko · Ratingen, DE
• Oliver Myschi · Duisburg, DE
• Michael Wechsung · Mülheim an der Ruhr, DE
• Uwe Zander · Wetter (Ruhr), DE

Key dates

• Filing date: Jul 14, 2005
• Grant date: Jun 19, 2012
• Expiry date: Jun 4, 2028

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01D3/04
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

Disclosed is a steam turbine comprising an exterior housing and an interior housing. The exterior housing and the interior housing are provided with a fresh steam supply duct. A rotor that encompasses several impeller blades and a thrust-compensating piston is rotably mounted within the interior housing. The interior housing is equipped with several guide blades that are disposed such that a flow duct comprising several blade stages, each of which comprises a series of impeller blades and a series of guide blades, is formed along a specific direction of flow. The interior housing is further equipped with a recirculation duct which is embodied as a pipe that communicates between a space located between the interior housing and the exterior housing and the flow duct downstream of a blade stage. The interior housing is additionally equipped with a supply duct that is configured as a pipe which communicates between the space located between the interior housing and the exterior housing and an antechamber of the thrust-compensating piston located between the thrust-compensating piston of the rotor and of the interior housing.