SEALING SYSTEM FOR A STEAM TURBINE, AND STEAM TURBINE

摘要

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.

主权项

1. A sealing system for sealing a sealing gap between an outer casing and a rotor shaft of a rotor of a steam turbine, comprising:
a barrier medium wall to create a barrier medium space between the rotor shaft and the outer casing in the region in front of and/or in the sealing gap, wherein the barrier medium wall is attached to the outer casing, a barrier medium opening in the barrier medium wall for supplying barrier medium from outside into the barrier medium space at a first pressure, a shaft seal for sealing the barrier medium space with respect to a second space in which a second pressure, smaller than the first pressure, prevails, and a floating ring seal for sealing the barrier medium space with respect to a third space in which a third pressure, smaller than the second pressure, prevails.