Global Patent Index - EP 1475516 A1

EP 1475516 A1 20041110 - High pressure turbine elastic clearance control system and method

Title (en)

High pressure turbine elastic clearance control system and method

Title (de)

System und Verfahren zur elastischen Spaltkontrolle von Hochdruckturbinen

Title (fr)

Système et procédé de réglage élastique du jeu d'extrémité d'une turbine à haute pression

Publication

EP 1475516 A1 20041110 (EN)

Application

EP 04252521 A 20040430

Priority

US 42821903 A 20030502

Abstract (en)

A system and method for achieving clearance control for a high-pressure turbine by means of casing mechanical deflection. An active clearance control system is provided to act on a blade (14) that rotates near a shroud (16). The shroud (16) is attached to a case (24) at a shroud supporting location, or shroud hanger (22). A clearance (18) is required between a tip of the blade (14) and the shroud (16). The blade (14) tip and shroud (16) are surrounded with an elastic case (24). This case (24) can deflect radially in response not only to thermal expansion, but also to a difference in pressures acting on the inner and outer diameters of the case (24). <IMAGE>

IPC 1-7

F01D 11/18; F01D 11/24; F01D 25/24

IPC 8 full level

F01D 11/08 (2006.01); F01D 11/16 (2006.01); F01D 11/18 (2006.01); F01D 11/22 (2006.01); F01D 25/24 (2006.01); F02C 7/28 (2006.01)

CPC (source: EP US)

F01D 11/16 (2013.01 - EP US); F01D 11/18 (2013.01 - EP US); F01D 25/246 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 1475516 A1 20041110; CN 1542259 A 20041103; JP 2004332731 A 20041125; US 2004219011 A1 20041104

DOCDB simple family (application)

EP 04252521 A 20040430; CN 200410042104 A 20040430; JP 2004135246 A 20040430; US 42821903 A 20030502