EP 0457240 A1 19911121 - Turbomachinery stage with reduced secondary losses.
Title (en)
Turbomachinery stage with reduced secondary losses.
Title (de)
Turbomaschinenstufe mit vermindertem Strömungsverlust.
Title (fr)
Etage de turbomachine avec pertes secondaires réduites.
Publication
Application
Priority
FR 9005991 A 19900514
Abstract (en)
Turbine stage comprising a bank of fixed blades (1) integral with the stator (3) of the turbine supporting a diaphragm followed by a bank of moving blades (7) mounted on a disc (9) integral with the rotor (6) of the turbine, the said bank of moving blades (7) comprising at its apex a leaktight packing (10) constituted from several chambers (11). The disc (9) comprises intake orifices (16) opening into the space between the diaphragm (4) and the disc and disposed in the vicinity of the peripheral section of the disc (9). <??>The intake orifices (16) are connected by ducts (17) traversing at least some moving blades (8) up to outlet orifices (18) opening at the apex of these blades (8) downstream of the leaktight packing (10) or in a chamber of the latter (11). <??>The disturbed flow at the feet of the fixed blades (2) and the leakage flow between diaphragm (4) and rotor (6) are taken in by the orifices (16), which improves the efficiency. <IMAGE>
IPC 1-7
IPC 8 full level
F01D 5/18 (2006.01); F01D 1/02 (2006.01); F01D 1/04 (2006.01); F01D 5/14 (2006.01); F01D 11/00 (2006.01); F01D 11/02 (2006.01); F01D 11/10 (2006.01)
CPC (source: EP US)
F01D 1/02 (2013.01 - EP US); F01D 5/145 (2013.01 - EP US); Y10S 415/914 (2013.01 - EP US)
Citation (search report)
- [Y] FR 2439157 A1 19800516 - FREUDENBERG CARL [DE]
- [Y] US 2945671 A 19600719 - ALEXANDER PETRIE JAMES
- [Y] US 4830575 A 19890516 - BANDUKWALLA PHIROZE [US]
- [A] GB 1013835 A 19651222 - LICENTIA GMBH
- [Y] POWER. vol. 133, no. 6, juin 1989, NEW YORK US pages S4 - S5; "Steam turbines and auxiliaries."
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0457240 A1 19911121; EP 0457240 B1 19940112; AT E100177 T1 19940115; CN 1057504 A 19920101; CS 139591 A3 19920115; CZ 279114 B6 19950118; DE 69100968 D1 19940224; DE 69100968 T2 19940505; DK 0457240 T3 19940509; ES 2049061 T3 19940401; FR 2661944 A1 19911115; FR 2661944 B1 19940610; JP H04228807 A 19920818; MX 166759 B 19930202; US 5167486 A 19921201; ZA 913635 B 19920226
DOCDB simple family (application)
EP 91107716 A 19910513; AT 91107716 T 19910513; CN 91103782 A 19910514; CS 139591 A 19910513; DE 69100968 T 19910513; DK 91107716 T 19910513; ES 91107716 T 19910513; FR 9005991 A 19900514; JP 20499091 A 19910514; MX 2574891 A 19910510; US 69912691 A 19910513; ZA 913635 A 19910514