Repairability analysis of the energy gas turbine rotor blade second stage shroud by high-temperature brazing

Abstract

The article considers the repair of the energy gas turbine rotor blade second stage shroud. The paper presents an analysis of the possibility of the repair consisting of the replacement of both labyrinth and honeycomb seals by the high-temperature brazing process. All the steps of the repair process were discussed and the results of microscopic metallographic evaluation using a light microscope and a scanning electron microscope were presented. Several advantages related to the use of this technology were indicated.

Keywords

• gas turbine
• high-temperature brazing
• honeycomb seal
• labyrinth seal