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1. (WO2017037394) TURBINE OF GAS TURBINE ENGINE, INCLUDING A LABYRINTH SEALING JOINT ELEMENT

Pub. No.:    WO/2017/037394    International Application No.:    PCT/FR2016/052171
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Sep 03 01:59:59 CEST 2016
IPC: F16J 15/44
F01D 11/12
F16J 15/447
F01D 11/02
Applicants: SAFRAN AIRCRAFT ENGINES
Inventors: MASSOT, Aurélien, René-Pierre
SCHWARTZ, Eric
SCHWEBLEN, Wilfried, Lionel
Title: TURBINE OF GAS TURBINE ENGINE, INCLUDING A LABYRINTH SEALING JOINT ELEMENT
Abstract:
The invention relates to a turbine of a gas turbine engine. Said turbine includes a stator sealing ring element (31) arranged so as to form a labyrinth sealing joint in combination with at least one wiper, rotatable about the axis of the sealing ring. The element (31) includes an abradable material layer with a surface portion (31p) engageable with said movable wiper. Said turbine is characterized in that the abradable material layer on said surface portion (31p) axially includes a first area (31p1) having a first wiper penetration resistance, said first area (31p1) corresponding to the axial position of the wiper during nominal operation of the turbine, and a second area (31p2) adjacent to the first area (31p1) and having lower wiper penetration resistance than the first area. Said second area (31p2) is located downstream from the first area (31p1) and corresponds to the axial position that the wiper takes when a flame goes out in the combustion chamber of the engine.