Sealing system for a steam turbine, and steam turbine

US10392956B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Christoph Grund · Munich, DE
• Detlef Haje · Görlitz, DE
• Lutz Neumann · Neufahrn, DE
• Martin Zien · Görlitz, DE

Key dates

• Filing date: Nov 10, 2014
• Grant date: Aug 27, 2019
• Expiry date: Apr 4, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2240/60
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A sealing system for sealing a sealing gap between an outer housing and a rotor shaft of a rotor of a steam turbine, having a blocking medium wall for producing a blocking medium area between the rotor shaft and the outer housing in the region in front of and/or in the sealing gap, wherein the blocking medium wall is secured to the outer housing. The sealing system also has a blocking medium opening in the blocking medium wall in order to feed a blocking medium from the outside into the blocking medium area. The sealing system also has a shaft seal for sealing the blocking medium area from a second area, which has a second pressure that is lower than the first pressure, and a sliding ring seal for sealing the blocking medium area from a third area, which has a third pressure that is lower than the second pressure.