主权项 |
1. A labyrinth seal for sealing the annular interspace between a stationary part and a rotating part of a steam turbine or gas turbine, comprising a multiplicity of sealing strips which are arranged in series in the axial direction, are fastened on the stationary part and project into the interspace, which sealing strips interact, with sealing effect, with rotor-side sealing elements which are arranged in a staggered manner, wherein the sealing strips in the cold installed state are offset in relation to a symmetrical position, wherein the offset has the reverse direction and the same amount as the distance by which the sealing strip is displaced relative to adjacent rotor-side sealing elements as a result of thermal expansions of the stationary support structure and rotating components when being heated from a cold installed state to a hot steady-state operating condition. |