Global Patent Index - EP 0921274 A3

EP 0921274 A3 20000906 - Aerodynamically damping vibrations in a rotor stage of a turbomachine

Title (en)

Aerodynamically damping vibrations in a rotor stage of a turbomachine

Title (de)

Aerodynamische Schwingungsdämpfung in einer Rotorstufe einer Turbomaschine

Title (fr)

Amortisation aerodynamique des vibrations dans un étage rotorique d'une turbomachine

Publication

EP 0921274 A3 20000906 (EN)

Application

EP 98309906 A 19981203

Priority

US 98440097 A 19971203

Abstract (en)

[origin: EP0921274A2] A rotor stage for a gas turbine engine is provided which includes a rotor disk (34) and a plurality of rotor blades (36). The rotor blades extend radially outward from the outer radial surface of the disk, and are separated from one another by a distance (D). The distance is selectively varied to increase aerodynamic damping of the rotor blades. <IMAGE>

IPC 1-7

F01D 5/10

IPC 8 full level

F01D 5/10 (2006.01); F01D 5/14 (2006.01); F01D 5/16 (2006.01); F01D 5/26 (2006.01); F01D 25/06 (2006.01); F04D 29/66 (2006.01)

CPC (source: EP)

F01D 5/10 (2013.01); F01D 5/14 (2013.01); F01D 5/26 (2013.01); F04D 29/666 (2013.01)

Citation (search report)

  • [XY] US 4253800 A 19810303 - SEGAWA YORIHIDE, et al
  • [Y] EP 0562527 A1 19930929 - KAWASAKI HEAVY IND LTD [JP]
  • [Y] US 5681145 A 19971028 - NEELY MICHAEL J [US], et al
  • [A] GB 2046360 A 19801112 - AES PLASTICS LTD
  • [A] US 5026251 A 19910625 - KINOSHITA TSUTOMU [JP], et al
  • [A] US 5000660 A 19910319 - VAN HOUTEN ROBERT J [US], et al
  • [XY] DATABASE COMPENDEX [online] ENGINEERING INFORMATION, INC., NEW YORK, NY, US; AKAIKE S ET AL: "Rotational noise analysis and prediction for an axial fan with unequal blade pitches", XP002141978, Database accession no. EIX94122070091 & PROCEEDINGS OF THE INTERNATIONAL GAS TURBINE AND AEROENGINE CONGRESS AND EXPOSITION;HAGUE, NETH JUN 13-16 1994, 1994, Am Soc Mech Eng Pap;American Society of Mechanical Engineers (Paper) 1994 Publ by ASME, New York, NY, USA, pages 1 - 7

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)

EP 0921274 A2 19990609; EP 0921274 A3 20000906; JP H11236803 A 19990831; KR 100508046 B1 20051125; KR 19990062719 A 19990726

DOCDB simple family (application)

EP 98309906 A 19981203; JP 35696698 A 19981201; KR 19980052533 A 19981202