Alstom Technology Limited

General Electric Technology Gmbh

Ansaldo Energia IP UK Limited

Christos Georgakis

Vasileios Stefanis

Hariharan Hanumanthan

Stacie Mark Tibos

Vassilis Stefanis

The invention relates to a seal between static components of a turbine. The seal includes at least one middle piece, which has at its opposite ends end pieces. The end pieces are arranged in a respective groove of the static components and adjoining the inside surfaces of the grooves. The middle piece has at least two parts. The middle piece parts are rotatably coupled to one another via a pivot. The pivot is an annular ring in cross section formed by at least two cylinder elements being coaxially interfitted and slidable relative to each other. The inner surface of the pivot is wrapped with metallic cloth material. Advantages of the invention are higher flexibility due to the pivoting to accommodate larger relative movements of the turbine components and reduced wear with aging while maintaining good sealing performance.

Seal between static turbine parts

An improved labyrinth seal is described with the seal including a group of several fins forming circumferential barriers against the flow of a working fluid between stationary and rotating parts in a turbine, wherein within the group the volume between the penultimate fin and the last fin is altered compared to the average volume between other adjacent fins of the group.

Labyrinth seal for turbines

Growing community of inventors

Leicester, United Kingdom

Christos Georgakis