Global patent index - EP 0985882 A1

EP 0985882 A1 2000-03-15 - Vibration damping in combustors

Title (en)

Vibration damping in combustors

Title (de)

Schwingungsdämpfung in Brennkammern

Title (fr)

Amortissement des vibrations dans des combusteurs

Publication

EP 0985882 A1 (DE)

Application

EP 98810901 A

Priority

EP 98810901 A

Abstract (en)

A burner generating hot gasses, e.g. for a gas turbine, has the fuel and air ducted into the combustion chamber (212), or into a mixing chamber (211). Some of the burnt gasses from the burner are recirculated by jets (220) in the sides of the burner to mix with the fuel prior to combustion. The operation of the burner reduces thermo-acoustic vibrations and produces a more controlled combustion.

Abstract (de)

Die erfindungsgemäßen Vorrichtungen und die erfindungsgemäßen Verfahren dienen der Dämpfung akustischer und/oder thermoakustischer Schwingungen in einer Brennkammer. Die Brennkammer ist hierbei zumeist als schadstoffarme Vormischbrennkammer ausgeführt und besteht aus einer Fluidzuführvorrichtung 210, einer Vorkammer 211, einer Vormischvorrichtung 214 und einem Brennraum 212. Das Fluid 200 wird dem Brennraum 212 vollständig oder nahezu vollständig durch das frontseitig angeordnete Frontpanel zugeführt. Erfindungsgemäß weist die Brennkammer zur Dämpfung der Schwingungen zumindest eine Rezirkulationsöffnung 220 auf. Darüber hinaus ist vorteilhaft ein Dämpfungsvolumen 230 und ein Injektor 225 angeordnet. Die Rezirkulationsöffnung 220 mündet hierbei bevorzugt zumindest teilweise in das Dämpfungsvolumen 230 ein. Mittels des Injektors 225 wird der Brennkammer höher verdichtetes Fluid zugeführt, um ein ausreichendes und eindeutiges Druckgefälle über die Brennkammer sicherzustellen. Eine typische Ausführung der Erfindung ist in Figur 2 dargestellt. <IMAGE>

IPC 1-7 (main, further and additional classification)

F23R 3/02; F23C 9/00; F23M 13/00; F23R 3/54

IPC 8 full level (invention and additional information)

F23C 9/00 (2006.01); F23M 99/00 (2010.01); F23R 3/02 (2006.01); F23R 3/28 (2006.01); F23R 3/54 (2006.01)

CPC (invention and additional information)

F23R 3/54 (2013.01); F23C 9/006 (2013.01); F23M 20/005 (2013.01); F23R 3/02 (2013.01); F23R 3/286 (2013.01); F05B 2260/96 (2013.01); F23R 2900/00014 (2013.01)

Citation (applicant)

  • DE 4304213 A1 19940818 - ABB RESEARCH LTD [CH]
  • KELLER J.J, ZAUNER E: "ON THE USE OF HELMHOLTZ RESONATORS AS SOUND ATTENUATORS", Z ANGEW MATH PHYS, no. 46, 1 January 1995 (1995-01-01), pages 297-327

Citation (search report)

Designated contracting state (EPC)

DE GB

EPO simple patent family

EP 0985882 A1 20000315; EP 0985882 B1 20031203; DE 59810347 D1 20040115; US 6430933 B1 20020813

INPADOC legal status

2016-08-09 [REG DE R081] CHANGE OF APPLICANT/PATENTEE

- Owner name: GENERAL ELECTRIC TECHNOLOGY GMBH, CH

- Ref Legal Event Code: R081

- Ref Document Number: 59810347

- Country of Ref Document: DE

2015-10-30 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: GB

- Ref Legal Event Code: PGFP

- Payment date: 20150917

- Year of fee payment: 18

2015-10-30 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Ref Legal Event Code: PGFP

- Payment date: 20150922

- Year of fee payment: 18

2004-11-24 [26N] NO OPPOSITION FILED

- Ref Legal Event Code: 26N

- Effective date: 20040906

2004-03-10 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Ref Legal Event Code: GBT

- Effective date: 20040212

2004-01-15 [REF] CORRESPONDS TO:

- Ref Legal Event Code: REF

- Ref Document Number: 59810347

- Country of Ref Document: DE

- Date of Ref Document: 2004-01-15

- Kind Code of Ref Document: P

2004-01-14 [RAP2] TRANSFER OF RIGHTS OF AN EP GRANTED PATENT

- Owner name: ALSTOM TECHNOLOGY LTD

- Ref Legal Event Code: RAP2

2003-12-03 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE GB

2003-12-03 [REG GB FG4D] EUROPEAN PATENT GRANTED

- Ref Legal Event Code: FG4D

- Free Format Text: NOT ENGLISH

2002-11-27 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: ALSTOM (SWITZERLAND) LTD

- Ref Legal Event Code: RAP1

2002-06-26 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20020514

2002-01-02 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: ALSTOM

- Ref Legal Event Code: RAP1

2000-11-22 [AKX] PAYMENT OF DESIGNATION FEES

- Ref Legal Event Code: AKX

- Free Format Text: DE GB

2000-11-15 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: ABB (SCHWEIZ) AG

- Ref Legal Event Code: RAP1

2000-11-02 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000831

2000-03-15 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE GB

2000-03-15 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Ref Legal Event Code: AX

- Free Format Text: AL;LT;LV;MK;RO;SI