EP 0985083 A1 20000315 - A METHOD IN OR RELATING TO THE START OF A POWER TURBINE AND ARRANGEMENT IN POWER TURBINE IN ORDER TO AVOID START DAMAGE ON TURBINE WHEEL/HOUSING
Title (en)
A METHOD IN OR RELATING TO THE START OF A POWER TURBINE AND ARRANGEMENT IN POWER TURBINE IN ORDER TO AVOID START DAMAGE ON TURBINE WHEEL/HOUSING
Title (de)
VERFAHREN ZUM STARTEN EINER NUTZTURBINE SOWIE VORRICHTUNG IN EINER NUTZTURBINE ZUM VERMEIDEN VON SCHADEN AN DER TURBINE ODER DEM GEHÄUSE
Title (fr)
PROCEDE RELATIF AU DEMARRAGE D'UNE TURBINE DE PUISSANCE ET ARRANGEMENTS RELATIFS A LADITE TURBINE PERMETTANT D'EVITER LES DOMMAGES DE DEMARRAGE SUBIS PAR LE CARTER ET LA ROUE DE TURBINE
Publication
Application
Priority
- NO 9800162 W 19980602
- NO 972553 A 19970605
Abstract (en)
[origin: WO9855738A1] Upon start up of a power turbine shortly after stoppage, the turbine housing (30) would have been cooled quicker than the turbine wheel (14); as a result of material shrinkages, the intermediate clearance will be too small, such that the turbine wheel scratches in too large leakage grooves in the adjacent housing or seal portions. Therefore, it is suggested to heat the power turbine housing (30, 36) before the start of the power turbine, especially upon start shortly after last stoppage. In a power turbine, where start damage should be prevented/avoided, comprising a rotor (14) having turbine blades (14a) surrounded by a stator-forming housing (30), preferably equipped with a seal (36) opposed to the radially outer tips of the turbine blades (14a), and where the turbine housing (30, 36) is, preferably, assigned a cooling jacket, it is suggested that the power turbine housing (30, 36) is assigned a heating jacket (32), e.g. in the form of a thermal manifold.
IPC 1-7
IPC 8 full level
F01D 11/24 (2006.01); F01D 19/02 (2006.01); F01D 25/10 (2006.01); F02C 7/262 (2006.01)
CPC (source: EP)
F01D 11/24 (2013.01); F01D 19/02 (2013.01); F01D 25/10 (2013.01); F02C 7/262 (2013.01); Y02T 50/60 (2013.01)
Citation (search report)
See references of WO 9855738A1
Designated contracting state (EPC)
BE DE DK ES FR GB IT NL SE
DOCDB simple family (publication)
WO 9855738 A1 19981210; AU 7457998 A 19981221; EP 0985083 A1 20000315; NO 306271 B1 19991011; NO 972553 D0 19970605; NO 972553 L 19981207
DOCDB simple family (application)
NO 9800162 W 19980602; AU 7457998 A 19980602; EP 98921927 A 19980602; NO 972553 A 19970605