Global Patent Index - EP 0921274 A3

EP 0921274 A3 2000-09-06 - 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 (EN)

Application

EP 98309906 A

Priority

US 98440097 A

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 (main, further and additional classification)

F01D 5/10

IPC 8 full level (invention and additional information)

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

CPC (invention and additional information)

F01D 5/26 (2013.01); F01D 5/10 (2013.01); F01D 5/14 (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 - 7PROCEEDINGS OF THE INTERNATIONAL GAS TURBINE AND AEROENGINE CONGRESS AND EXPOSITION;HAGUE, NETH JUN 13-16 1994Am Soc Mech Eng Pap;American Society of Mechanical Engineers (Paper) 1994 Publ by ASME, New York, NY, USA199417

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0921274 A2 19990609; EP 0921274 A3 20000906; JP H11236803 A 19990831

INPADOC legal status


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