EP 0259221 B1 19900307 - LABYRINTH CLEARANCE ADJUSTMENT FOR A TURBO MACHINE
Title (en)
LABYRINTH CLEARANCE ADJUSTMENT FOR A TURBO MACHINE
Publication
Application
Priority
FR 8612358 A 19860903
Abstract (en)
[origin: US4773817A] The adjustment of clearances at the time of assembly and subsequently during operation of a labyrinth seal lying between the rotor and stator of a turbomachine is effected by radial displacements of a bush radially rigid with an outer pivot pin of each blade of the stator and co-operates with a boss of the casing by means of screw-threads. Such displacements are controlled as a function of a signal provided by a computer which integrates various operational parameters of the turbomachine and acts on a control ring connected by a lever to the said bush. The internal pivot of the blade is rigid with an annular member which carries a layer of abradable material constituting a fixed part of the labyrinth seal. The rotary part of the labyrinth seal is mounted on an opposed part of the rotor. A method for effecting the adjustment of the clearances is also described.
IPC 1-7
IPC 8 full level
F01D 11/00 (2006.01); F01D 11/08 (2006.01); F01D 17/16 (2006.01)
CPC (source: EP US)
F01D 11/001 (2013.01 - EP US); F01D 11/08 (2013.01 - EP US); F01D 17/162 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0259221 A1 19880309; EP 0259221 B1 19900307; DE 3761834 D1 19900412; FR 2603340 A1 19880304; FR 2603340 B1 19881104; US 4773817 A 19880927
DOCDB simple family (application)
EP 87401931 A 19870826; DE 3761834 T 19870826; FR 8612358 A 19860903; US 8954387 A 19870826