EP 1055052 A1 20001129 - METHOD OF RECOGNITION OF A SHAFT RUPTURE IN A TURBO-ENGINE
Title (en)
METHOD OF RECOGNITION OF A SHAFT RUPTURE IN A TURBO-ENGINE
Title (de)
VERFAHREN ZUM ERKENNEN EINES WELLENBRUCHES IN EINER STRÖMUNGSKRAFTMASCHINE
Title (fr)
PROCEDE POUR IDENTIFIER UNE RUPTURE D'ARBRE DANS UNE TURBOMACHINE
Publication
Application
Priority
- DE 19857552 A 19981214
- EP 9908717 W 19991112
Abstract (en)
[origin: DE19857552A1] The invention relates to a method of recognition of a shaft rupture in a turbo-engine with the purpose of initiating a suitable speed range limiting measure, especially an emergency shut-down of the fuel supply in a gas turbine system of an aircraft. According to the inventive method, a torque-supplying turbine rotor and a torque-absorbing unit are linked with one another via the shaft (3) which is to be monitored for a rupture and the ends of which are arranged on at least two roller bearings (6, 7). The rotary frequencies (fn1, fn2) of the two ends of the shaft in the roller bearings (6, 7) of the shaft (3) are detected and compared continuously and substantially in real time. If the rotary frequency (fn1) at the roller bearing (7) at the turbine rotor's end is higher than the rotary frequency (fn2) at the roller bearing (6) of the torque-absorbing unit, rupture of the shaft (3) is assumed. Preferably, the rotary frequency of the respective end of the shaft is determined via fast-Fourier transmission and an arithmetic processor for both roller bearings (6, 7) via separate measuring channels. The measurement is based on one or several typical roller bearing frequencies that are emitted by said roller bearings when they rotate.
IPC 1-7
IPC 8 full level
F01D 21/00 (2006.01); F01D 21/02 (2006.01); F01D 21/04 (2006.01)
CPC (source: EP US)
F01D 21/00 (2013.01 - EP US); F01D 21/02 (2013.01 - EP US); F01D 21/045 (2013.01 - EP US); F05D 2270/021 (2013.01 - EP US); F05D 2270/09 (2013.01 - EP US)
Citation (search report)
See references of WO 0036280A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DE 19857552 A1 20000615; DE 59909646 D1 20040708; EP 1055052 A1 20001129; EP 1055052 B1 20040602; US 6494046 B1 20021217; WO 0036280 A1 20000622
DOCDB simple family (application)
DE 19857552 A 19981214; DE 59909646 T 19991112; EP 9908717 W 19991112; EP 99955983 A 19991112; US 62202601 A 20010129