EP1836401A1 - Procede de modification d'un compresseur a plusieurs etages - Google Patents

Procede de modification d'un compresseur a plusieurs etages

Info

Publication number
EP1836401A1
EP1836401A1 EP06707706A EP06707706A EP1836401A1 EP 1836401 A1 EP1836401 A1 EP 1836401A1 EP 06707706 A EP06707706 A EP 06707706A EP 06707706 A EP06707706 A EP 06707706A EP 1836401 A1 EP1836401 A1 EP 1836401A1
Authority
EP
European Patent Office
Prior art keywords
compressor
blades
blade
row
blade angle
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.)
Granted
Application number
EP06707706A
Other languages
German (de)
English (en)
Other versions
EP1836401B1 (fr
Inventor
Marco Micheli
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.)
General Electric Technology GmbH
Original Assignee
Alstom Technology AG
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 Alstom Technology AG filed Critical Alstom Technology AG
Priority to EP06707706.5A priority Critical patent/EP1836401B1/fr
Publication of EP1836401A1 publication Critical patent/EP1836401A1/fr
Application granted granted Critical
Publication of EP1836401B1 publication Critical patent/EP1836401B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/02—Multi-stage pumps
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
    • F04D29/324—Blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/60—Assembly methods
    • F05B2230/601—Assembly methods using limited numbers of standard modules which can be adapted by machining
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49238—Repairing, converting, servicing or salvaging

Definitions

  • the invention relates to a method for modifying a multi-stage compressor according to claim 1. Furthermore, it relates to a modified according to the specified method compressor and a gas turbine group, which comprises a so-modified compressor.
  • a modification of turbocompressors can be done by the blade angle of blade rows is changed at a constant profile of the blades.
  • the blade angle is usually defined as the angle that encloses the chord of the profile with the circumferential direction of the compressor.
  • Another aspect of the invention is to increase the mass flow of the compressor increase, in an exemplary embodiment, by up to six percent over the compressor prior to modification. In a more specific embodiment, the increase of the mass flow should be achieved without reducing the flow stability in the compressor and / or provoking flow blockages in the blade channels due to the increased mass flow.
  • the method described in claim 1 is capable, among other advantageous effects, to meet the requirements set out above.
  • the method comprises exchanging the blades of the first compressor barrel row for changed blades, which have an identical blade airfoil profile and a blade angle that is different compared to the originally installed rotor blades.
  • the absorption capacity of the first compressor run series can be increased and, in particular, the compressor mass flow can be increased in conjunction with an adjustable preliminary guide row.
  • a potentially deteriorated flow stability associated with the changed geometry of the blade lattice is counteracted by further varying the blade angle of at least one row of blades further downstream, and more particularly downstream of the second compressor stage.
  • the blades of the at least one further row of blades are replaced by modified blades which have an identical airfoil profile as the original blades, and whose blade angle is different from that of the original blades.
  • the change of the blade angle in the further blade row is in the same direction as the change of the blade angle in the first compressor barrel row, that is, if the blade angle of the first compressor barrel row is increased, also the blade angle of the further blade row is increased, and if the Shovel angle of the first compressor run series is reduced, also the blade angle of the other blade row is reduced.
  • An embodiment of the The invention is characterized in that the blade geometry of the guide row of the first compressor stage is maintained unchanged, so that neither the blade airfoil nor the blade angle are changed.
  • a row of flights comprises a blade ring or a blade grid, which comprises a plurality of rotor blades.
  • rotor components for example rotor blading, rotor blade ring, or rotor blade grille and the like.
  • a guide row comprises a blade ring or a blade grid, which comprises a plurality of guide vanes.
  • stator components for example stator blading, stator blade rings, or stator blade grids and the like.
  • a further development of the method specified here comprises exchanging the blades of the second compressor barrel row for changed blades, which have an identical airfoil profile as the original blades, and whose blade angle is different from that of the original blades.
  • An embodiment of this development comprises maintaining the blade geometry of the guide row of the second compressor stage unchanged.
  • Developments of the method described here include, in at least one downstream of the second compressor stage arranged compressor stage to replace both the blades of the row and the blades of the Leit marina against modified blades having an identical airfoil profile as the original blades, and their blade angle of the the original one Shovels is different, and / or the blades of at least one row of blades each downstream of the second compressor stage arranged compressor stage to replace changed blades having an identical airfoil profile as the original blades, and their blade angle is different from that of the original blades.
  • the blade angles in the rows of blades whose blades are replaced by changed blades, adapted to each other, that the relative Enthalpieimposed, based on the total Enthalpieimposed in the compressor, in the individual compressor stages and / or in the individual Blade rows compared to the unmodified compressor is kept substantially constant.
  • An increase in the blade angle which is defined as the angle which the chord of the airfoil profile encloses with the circumferential direction of the compressor, generally results in an increase in the mass flow.
  • an increase in the compressor mass flow can be achieved by up to six percent without substantially changing the stability reserve of the compressor.
  • the invention further comprises a compressor which is modified by the method described above.
  • a compressor comprises at least three axial compressor stages, and in a more specific embodiment it is a purely axial multi-stage compressor.
  • Multi-stage purely axial turbocompressors are used, for example, as compressors of gas turbine groups;
  • the invention also includes a gas turbine group having a compressor modified by a method as described above.
  • FIG. 1 shows a gas turbine group
  • Figure 2 details of a multi-stage axial compressor
  • Figure 3 details of a modified multi-stage axial compressor.
  • FIG. 1 shows a gas turbine group 100.
  • This includes a multi-stage axial turbocompressor 101, a combustor 102 and a turbine 103.
  • the gas turbine group shaft 111 is drive-connected to a generator 104.
  • the compressor 101 includes a Housing in which the static components of the compressor are arranged, and the shaft 111 on which the rotor components are arranged.
  • the compressor shown as an example and simplified comprises a Vorleit Herbert IGV, which may be equipped with adjustable vanes, and ten compressor stages 1 to 10.
  • the number of compressor stages here is not limiting;
  • the turbocompressors of modern gas turbine groups usually have a higher number of stages, for example 17 to 21. For an illustration of the invention, however, the representation with ten compressor stages is sufficient and clearer.
  • the flow direction of the compressor is in the drawing from left to right.
  • the first compressor stage comprises a blade row LA1 arranged on the shaft and a stator blade row LE1 arranged downstream thereof in the housing. All other compressor stages likewise each comprise a blade row with a row of guide blades arranged downstream thereof.
  • each row of blades comprises a plurality of blades, each of which has a blade root and an airfoil in a manner also known per se.
  • FIG. 2 shows details of an exemplary compressor, as used, for example, in the gas turbine group from FIG. 1, in its original state, that is to say prior to a modification with the specified method.
  • the blades are labeled 121, 122, 123, 124, 125, and 126.
  • the airfoil profiles can be seen, as well as the blade angle, which is defined as the angle which encloses the chord of the airfoil profile with the circumferential direction of the compressor.
  • the blade angle of the blades 121 of the first Series LA1 is labeled B'10.
  • the bucket angle of the vanes 122 of the first guide row LE1 is denoted by B "io.
  • the bucket angle of the second row LA2 vanes 123 is denoted B'20.”
  • the bucket angle of the second guide row LE2 vanes 124 is denoted B "2o.
  • the blade angle of the vanes 125 of the row LAN is denoted by B'NO.
  • the blade angle of the vanes 126 of the LEN guide row is denoted B "NO, and Figure 3 shows the compressor of Figure 2 which has been modified by the method described
  • the blade profiles of the blades in the illustrated blade rows are identical
  • the blade angle in the first row LA1 has been increased from B'io to B'n
  • the blade angle of the second row LA2 has been increased from B'2o to B'2i.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un procédé de modification d'un compresseur à plusieurs étages (101). Ce procédé consiste à remplacer les aubes mobiles de la première série d'aubes mobiles (LA1) par des aubes mobiles modifiées qui présentent un profil de pale (121) identique à celui des aubes mobiles d'origine mais dont l'angle d'aube (B'11) est différent de l'angle d'aube (B'10) des aubes mobiles d'origine. En outre, les aubes d'au moins une autre série d'aubes (LAN, LEN) disposée en aval du deuxième étage du compresseur sont remplacées par des aubes modifiées qui présentent un profil de pale (125, 126) identique à celui des aubes d'origine mais dont l'angle d'aube (B'N1, B''N1) est différent de l'angle d'aube (B'N0, B''N0) des aubes d'origine. Ce procédé permet d'accroître le débit massique d'un compresseur et de maintenir sensiblement la réserve de stabilité contre un décollement des filets d'air.
EP06707706.5A 2005-01-14 2006-01-12 Méthode pour modifier un compresseur multi-étages Not-in-force EP1836401B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06707706.5A EP1836401B1 (fr) 2005-01-14 2006-01-12 Méthode pour modifier un compresseur multi-étages

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05100201A EP1681472A1 (fr) 2005-01-14 2005-01-14 Méthode pour modifier un compresseur multi-étages
EP06707706.5A EP1836401B1 (fr) 2005-01-14 2006-01-12 Méthode pour modifier un compresseur multi-étages
PCT/EP2006/050172 WO2006075014A1 (fr) 2005-01-14 2006-01-12 Procede de modification d'un compresseur a plusieurs etages

Publications (2)

Publication Number Publication Date
EP1836401A1 true EP1836401A1 (fr) 2007-09-26
EP1836401B1 EP1836401B1 (fr) 2014-09-24

Family

ID=34938514

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05100201A Withdrawn EP1681472A1 (fr) 2005-01-14 2005-01-14 Méthode pour modifier un compresseur multi-étages
EP06707706.5A Not-in-force EP1836401B1 (fr) 2005-01-14 2006-01-12 Méthode pour modifier un compresseur multi-étages

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP05100201A Withdrawn EP1681472A1 (fr) 2005-01-14 2005-01-14 Méthode pour modifier un compresseur multi-étages

Country Status (4)

Country Link
US (1) US7753649B2 (fr)
EP (2) EP1681472A1 (fr)
TW (1) TWI364490B (fr)
WO (1) WO2006075014A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1448880A1 (fr) * 2001-09-24 2004-08-25 ALSTOM Technology Ltd Systeme de turbine a gaz destine a un fluide de travail se presentant sous la forme d'un melange dioxyde de carbone/eau
TWI397634B (zh) * 2010-12-06 2013-06-01 China Steel Corp 多級壓縮機之線上監控方法
CN104763475B (zh) * 2015-03-28 2016-09-14 中国船舶重工集团公司第七�三研究所 三转子燃气轮机
US9938985B2 (en) 2015-09-04 2018-04-10 General Electric Company Airfoil shape for a compressor
US9957964B2 (en) 2015-09-04 2018-05-01 General Electric Company Airfoil shape for a compressor
US9746000B2 (en) 2015-09-04 2017-08-29 General Electric Company Airfoil shape for a compressor
US9771948B2 (en) 2015-09-04 2017-09-26 General Electric Company Airfoil shape for a compressor
US10041370B2 (en) 2015-09-04 2018-08-07 General Electric Company Airfoil shape for a compressor
US9745994B2 (en) 2015-09-04 2017-08-29 General Electric Company Airfoil shape for a compressor
US9759227B2 (en) 2015-09-04 2017-09-12 General Electric Company Airfoil shape for a compressor
US9777744B2 (en) 2015-09-04 2017-10-03 General Electric Company Airfoil shape for a compressor
US9759076B2 (en) 2015-09-04 2017-09-12 General Electric Company Airfoil shape for a compressor
US9732761B2 (en) 2015-09-04 2017-08-15 General Electric Company Airfoil shape for a compressor
US9951790B2 (en) 2015-09-04 2018-04-24 General Electric Company Airfoil shape for a compressor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705590A (en) * 1949-10-28 1955-04-05 Rolls Royce Multi-stage axial-flow compressors with adjustable pitch stator blades
US2990106A (en) * 1956-10-12 1961-06-27 English Electric Co Ltd Axial flow multi-stage compressors
US2999668A (en) * 1958-08-28 1961-09-12 Curtiss Wright Corp Self-balanced rotor blade
NL123379C (fr) * 1963-11-01
DE1503628B2 (de) * 1965-10-22 1974-06-27 Turbon Ventilatoren- Und Apparatebau Gmbh, 1000 Berlin Flügelrad
US4252498A (en) * 1978-03-14 1981-02-24 Rolls-Royce Limited Control systems for multi-stage axial flow compressors

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006075014A1 *

Also Published As

Publication number Publication date
TW200637965A (en) 2006-11-01
WO2006075014A1 (fr) 2006-07-20
EP1681472A1 (fr) 2006-07-19
TWI364490B (en) 2012-05-21
EP1836401B1 (fr) 2014-09-24
US20080260516A1 (en) 2008-10-23
US7753649B2 (en) 2010-07-13

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