EP0921274A3 - Aerodynamically damping vibrations in a rotor stage of a turbomachine - Google Patents

Aerodynamically damping vibrations in a rotor stage of a turbomachine Download PDF

Info

Publication number
EP0921274A3
EP0921274A3 EP98309906A EP98309906A EP0921274A3 EP 0921274 A3 EP0921274 A3 EP 0921274A3 EP 98309906 A EP98309906 A EP 98309906A EP 98309906 A EP98309906 A EP 98309906A EP 0921274 A3 EP0921274 A3 EP 0921274A3
Authority
EP
European Patent Office
Prior art keywords
aerodynamically
turbomachine
rotor
rotor stage
damping vibrations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98309906A
Other languages
German (de)
French (fr)
Other versions
EP0921274A2 (en
Inventor
Yehia M. El-Aini
Bradford A. Cowles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raytheon Technologies Corp
Original Assignee
United Technologies Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United Technologies Corp filed Critical United Technologies Corp
Publication of EP0921274A2 publication Critical patent/EP0921274A2/en
Publication of EP0921274A3 publication Critical patent/EP0921274A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/26—Antivibration means not restricted to blade form or construction or to blade-to-blade connections or to the use of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/10—Anti- vibration means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes

Abstract

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.
EP98309906A 1997-12-03 1998-12-03 Aerodynamically damping vibrations in a rotor stage of a turbomachine Withdrawn EP0921274A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US98440097A 1997-12-03 1997-12-03
US984400 1997-12-03

Publications (2)

Publication Number Publication Date
EP0921274A2 EP0921274A2 (en) 1999-06-09
EP0921274A3 true EP0921274A3 (en) 2000-09-06

Family

ID=25530526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98309906A Withdrawn EP0921274A3 (en) 1997-12-03 1998-12-03 Aerodynamically damping vibrations in a rotor stage of a turbomachine

Country Status (3)

Country Link
EP (1) EP0921274A3 (en)
JP (1) JPH11236803A (en)
KR (1) KR100508046B1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10326533A1 (en) * 2003-06-12 2005-01-05 Mtu Aero Engines Gmbh Rotor for a gas turbine and gas turbine
DE102004001845A1 (en) 2004-01-13 2005-08-04 J. Eberspächer GmbH & Co. KG Conveying member, in particular rotor or stator, for conveying a flowable, preferably gaseous, medium
US20120099995A1 (en) * 2010-10-20 2012-04-26 General Electric Company Rotary machine having spacers for control of fluid dynamics
US8678752B2 (en) * 2010-10-20 2014-03-25 General Electric Company Rotary machine having non-uniform blade and vane spacing
US8684685B2 (en) * 2010-10-20 2014-04-01 General Electric Company Rotary machine having grooves for control of fluid dynamics
KR20160014468A (en) 2014-07-29 2016-02-11 포스코강판 주식회사 Pad for preventing end-mark
FR3078096B1 (en) * 2018-02-20 2020-03-06 Arianegroup Sas ROTOR FOR TURBOMACHINE AND TURBOMACHINE INCLUDING THIS ROTOR
US20230235680A1 (en) * 2022-01-26 2023-07-27 General Electric Company Non-uniform turbomachinery blade tips for frequency tuning

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2046360A (en) * 1979-03-31 1980-11-12 Aes Plastics Ltd Fluid impeller
US4253800A (en) * 1978-08-12 1981-03-03 Hitachi, Ltd. Wheel or rotor with a plurality of blades
US5000660A (en) * 1989-08-11 1991-03-19 Airflow Research And Manufacturing Corporation Variable skew fan
US5026251A (en) * 1988-07-14 1991-06-25 Asmo Co., Ltd. Compact fan unit for automobile
EP0562527A1 (en) * 1992-03-24 1993-09-29 Kawasaki Jukogyo Kabushiki Kaisha Tail rotor for rotor craft
US5681145A (en) * 1996-10-30 1997-10-28 Itt Automotive Electrical Systems, Inc. Low-noise, high-efficiency fan assembly combining unequal blade spacing angles and unequal blade setting angles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4253800A (en) * 1978-08-12 1981-03-03 Hitachi, Ltd. Wheel or rotor with a plurality of blades
GB2046360A (en) * 1979-03-31 1980-11-12 Aes Plastics Ltd Fluid impeller
US5026251A (en) * 1988-07-14 1991-06-25 Asmo Co., Ltd. Compact fan unit for automobile
US5000660A (en) * 1989-08-11 1991-03-19 Airflow Research And Manufacturing Corporation Variable skew fan
EP0562527A1 (en) * 1992-03-24 1993-09-29 Kawasaki Jukogyo Kabushiki Kaisha Tail rotor for rotor craft
US5681145A (en) * 1996-10-30 1997-10-28 Itt Automotive Electrical Systems, Inc. Low-noise, high-efficiency fan assembly combining unequal blade spacing angles and unequal blade setting angles

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
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 *

Also Published As

Publication number Publication date
KR100508046B1 (en) 2005-11-25
EP0921274A2 (en) 1999-06-09
JPH11236803A (en) 1999-08-31
KR19990062719A (en) 1999-07-26

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