EP0844367B1 - Geschweisster Rotor einer Strömungsmaschine - Google Patents
Geschweisster Rotor einer Strömungsmaschine Download PDFInfo
- Publication number
- EP0844367B1 EP0844367B1 EP97810814A EP97810814A EP0844367B1 EP 0844367 B1 EP0844367 B1 EP 0844367B1 EP 97810814 A EP97810814 A EP 97810814A EP 97810814 A EP97810814 A EP 97810814A EP 0844367 B1 EP0844367 B1 EP 0844367B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- cooling medium
- web
- holes
- rotor according
- 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.)
- Expired - Lifetime
Links
Images
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
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
- F01D5/063—Welded rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
Definitions
- the present invention relates to a welded rotor a turbomachine according to the preamble of claim 1.
- the rotor internal Intermediate channels for the flow of the cooling medium in the plane of the radial or quasi-radial Weld seams must have annular cavities, which indispensable for the flow and transfer of the cooling medium to the blades to be cooled are necessary, whereby the type of welding bridging of the radial or quasi-radial welding seams in the area of these Cavities weight the operational quality of such a rotor influence.
- FR 876.194 describes a welded rotor for a steam turbine or for known a gas turbine.
- This rotor is made up of rotor disks 1 which are connected to one another by means of weld seams 8 and form the rotor body. Cavities are arranged between these rotor disks Cooling channels 13 are interconnected. The cavities become radial outside through the weld seams 8 and radially inside through the (composite) rotor shaft limited.
- the invention seeks to remedy this.
- the invention how it is characterized in the claims, the task lies based on one with a cooling medium that is efficient per se propose precautions for the cooled rotor of the type mentioned at the outset, which fix the above disadvantages capital.
- the leadership is proposed according to the invention of the cooling medium in a gas turbine rotor thus take place let this start from one mostly in the center of the wave at the end of the axial feed radial or quasi-radial lead to the outside, then this cooling medium axially or quasi-axially to the individual feet of the ones to be cooled To make blades flow, and in a similar way and Way backflow until cooling steam emerges from the rotor to be designed so that this coolant outlet preferably is an annular channel concentric with the cooling medium inlet runs.
- the main advantage of the invention is that even with a disc made of welded together Rotor for a gas turbine cooling with a Amount of steam can be carried out, the cooling circuit is hermetically sealed inside the rotor, and it only through forged material or weld metal.
- the one in the area of the weld seams existing annular cavities for the Transfer of the cooling medium to the individual to be cooled Blades are made without affecting the mechanical Properties of these weld seams.
- the Design of these cavities kept so that the continuation the radial or quasi-radial welding seams can be carried out optimally in terms of welding technology.
- the internal cooling system is therefore tangential Cooling channels are formed which run in the circumferential direction, in such a way that the cooling medium is distributed around the circumference and opens into axial or oblique cooling channels.
- intermediate ring-shaped cavities are the ones that impose themselves there Bridging and continuing the radial or quasi-radial to accomplish running weld seams with an insert ring, preferably with one in the cavity protruding web is provided.
- This insert ring takes over then the centering and the radial support at Welding the continuation weld.
- the bridge points over it holes on the outside, which are on the largest radius of the web and through which the coolant inside can flow through the respective annular cavity.
- Radial slots catch the thermal expansion of the webs on, using the holes above to drain the condensed water the ends of said slots before stress concentration protects.
- Another advantage of the invention is that these slits in the web at least the tangential elongation of the same during the start-up process of the system capital.
- Fig. 1 shows an internal cooling system, as is the case with rotors of turbomachines, in particular of gas turbines for use arrives.
- the rotor 1 is equipped with blades 2 from a number of welded disks like this the course of the weld seams 6 emerges. Between Blades 2 are guide vanes 3, which are used for Stator belong to this flow machine.
- a system from flowed with a cooling medium 14 and in the circumferential direction of the rotor 1 distributed channels runs through the axial extent of the rotor 1, such that the rotor blades 2 therefore, by means of appropriately provided branches, either can be cooled in parallel or in series.
- Fig. 1 shows in this regard, based on the cooling of the blades 2 of a series connection.
- Main cooling medium cavity 12 branches at least one inflow channel 4 starting from the center of the rotor 1 leads to the outside. In the area of the rotor outer surface 13 for each inflow channel 4, preferably a non-visible one Separator of dust particles assigned. The said inflow channel 4 then goes in downstream of such a separator one running essentially axially or quasi-axially another inflow channel 9 over.
- This inflow channel 9 ends at the end of the rotor 1 equipped with blades in an internal rotor annular cavity 5, from where via a branch channel 7 a first blade 2 respectively. Blade row is cooled.
- Cooling medium 14 happens from the cooled blade 2 via a further branch channel 8, which in turn is intermediate into another rotor-shaped annular cavity 5a opens, from here the cooling of the remaining Make blades gradually in an analogous manner goes.
- This outflow channel 10 then goes in the area of the not visible Separator in a radial or quasi-radial Backflow channel 11 over which the cooling medium 15 to a promotes further, not visible consumers or leads out of the rotor 1.
- steam is preferably used, for example at a combined system (gas / steam system) in any case sufficient Quantity and quality regarding cooling efficiency available stands.
- Fig. 2 shows the part highlighted in Fig. 1 in the area of internal annular cavity 5a and that in FIG. 1 not visible continuation of the rotor welding, the through said cavity 5a in a radial course is interrupted.
- a via weld seams 21 with the rotor 1 connected annular insert ring 20, which is attached from the outside can be with one each in the cavity 5a protruding web 25 provided the centering and radial support during welding.
- the web 25 of the Insert ring 20 is further provided with holes 22, so that the cooling medium 14 is passed within the cavity 5a can be.
- FIG. 3 is an axial view of the insert ring according to FIG. 2 and shows the arrangement of the holes 22 for the flow of the cooling medium within the cavity (see FIGS. 1 and 2, Pos. 5, 5a, 5b).
- These holes 22 are the largest on the outside Radius of the web 25 arranged.
- Radially extending from the holes 22 Slots 24 protect the webs 25 in particular from tangential thermal expansion occurring during the start-up process as well as in the transient load ranges of the plant. turn the ends of these slots 24 through said holes 22 protected against stress concentration.
- the insert ring 20 with web 25 consists of at least 2 in the circumferential direction Share what makes them easy to install from the outside, and then lightly together with longitudinal weld seams 23 can be connected.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Description
- Fig. 1
- ein rotorinternes Kühlsystem,
- Fig. 2
- eine durch einen Einsatzring gebildete schweisstechnische Ueberbrückung eines rotorinternen Hohlraumes und
- Fig. 3
- eine axiale Ansicht des Einsatzringes gemäss Fig. 2.
- 1
- Rotor
- 2
- Laufschaufeln
- 3
- Leitschaufeln
- 4
- Zuströmungskanal
- 5
- Rotorinterner ringförmiger Hohlraum
- 5a
- Rotorinterner ringförmiger Hohlraum
- 5b
- Rotorinterner ringförmiger Hohlraum
- 6
- Schweissnähte
- 6a
- Fortsetzungsschweissnaht
- 7
- Abzweigekanal
- 8
- Abzweigekanal
- 9
- Zuströmungskanal
- 10
- Abströmungskanal
- 11
- Rückströmungskanal
- 12
- Kühlmedium-Haupthohlraum
- 13
- Rotor-Aussenfläche
- 14
- Kühlmedium
- 15
- Thermisch verbrauchtes Kühlmedium
- 20
- Einsatzring
- 21
- Schweissnähte
- 22
- Löcher
- 23
- Längsschweissnähte
- 24
- Schlitze
- 25
- Steg
- 26
- Abführung des Kondensats
Claims (9)
- Geschweisster Rotor einer Strömungsmaschine, der über rotorinterne Zu- und Abströmungskanäle (9, 10) mit einem Kühlmedium (14) durchströmt ist, wobei der Rotor (1) aus einer Anzahl Scheiben (1a, 1b, 1c, 1d) besteht, und wobei benachbarte Scheiben (1a, 1b, 1c, 1d) über radial oder quasi-radial verlaufende Schweissnähte (6) miteinander verbunden sind dadurch gekennzeichnet, dass zwischen jeder Schweissnaht (6) und zwischen jeweils einer, zu jeder Schweissnaht (6) radial nach außen zugehörigen benachbarte Scheiben (1a, 1b, 1c, 1d) verbindenden Fortsetzungsschweissnaht (6a) jeweils ein von dem Kühlmedium (14) durchströmter, rotorinterner ringförmiger Hohlraum (5, 5a, 5b) angeordnet ist, dass jeder Hohlraum (5, 5a, 5b) mit mindestens einem in Umfangsrichtung verlaufenden Einsatzring (20) ummantelt ist, und dass auf dem Einsatzring (20) die Fortsetzungsschweissnaht (6a) angebracht ist.
- Rotor nach Anspruch 1, dadurch gekennzeichnet, dass das Kühlmedium (14) ein Dampf ist.
- Rotor nach Anspruch 1, dadurch gekennzeichnet, dass die Hohlräume (5, 5a, 5b) eine grössere axiale Breite gegenüber derjenigen der Schweissnähte (6) und der Fortsetzungsschweissnähte (6a) aufweisen.
- Rotor nach Anspruch 1, dadurch gekennzeichnet, dass der Einsatzring (20) einen in den Hohlraum (5, 5a, 5b) hineinragenden Steg (25) aufweist, der die Zentrierung und die radiale Abstützung der Fortsetzungsschweissnaht (6a) übernimmt.
- Rotor nach Anspruch 4, dadurch gekennzeichnet, dass der Steg (25) mit Löcher (22) für die Durchströmung des Kühlmediums (14) innerhalb des Hohlraumes (5, 5a, 5b) versehen ist.
- Rotor nach den Ansprüchen 1 und 5, dadurch gekennzeichnet, dass die Einströmung des Kühlmediums (14) in die Hohlräume (5, 5a, 5b) und dessen Ausströmung einen von der Mitte des Rotors (1) aus grösseren Radius gegenüber der Durchflussebene des Kühlmediums (14) durch die Löcher (22) des Steges (25) aufweist.
- Rotor nach Anspruch 5, dadurch gekennzeichnet, dass die Löcher (22) auf dem grössten Radius des Steges (25) an-geordnet sind.
- Rotor nach Anspruch 5, dadurch gekennzeichnet, dass die Löcher (22) aussen den grössten Radius des Steges (25) tangieren.
- Rotor nach Anspruch 5, dadurch gekennzeichnet, dass der Steg (25) in Wirkverbindung mit dne Löchern (22) radial oder quasi-radial nach der Rotormitte gerichtete Schlitze (24) aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19648185A DE19648185A1 (de) | 1996-11-21 | 1996-11-21 | Geschweisster Rotor einer Strömungsmaschine |
DE19648185 | 1996-11-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0844367A1 EP0844367A1 (de) | 1998-05-27 |
EP0844367B1 true EP0844367B1 (de) | 2002-04-10 |
Family
ID=7812337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97810814A Expired - Lifetime EP0844367B1 (de) | 1996-11-21 | 1997-10-31 | Geschweisster Rotor einer Strömungsmaschine |
Country Status (3)
Country | Link |
---|---|
US (1) | US5993154A (de) |
EP (1) | EP0844367B1 (de) |
DE (2) | DE19648185A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6519849B2 (en) | 1998-12-10 | 2003-02-18 | Alstom (Switzerland) Ltd | Method for the manufacture of a welded rotor of a fluid-flow machine |
US8517676B2 (en) | 2009-11-04 | 2013-08-27 | Alstom Technology Ltd | Welded rotor of a gas turbine engine compressor |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4777489B2 (ja) * | 1997-03-31 | 2011-09-21 | ザ チルドレンズ メディカル センター コーポレーション | アポトーシス性酵素を不活性化するためのニトロシル化 |
US6393831B1 (en) | 2000-11-17 | 2002-05-28 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Exoskeletal engine |
DE10355738A1 (de) * | 2003-11-28 | 2005-06-16 | Alstom Technology Ltd | Rotor für eine Turbine |
JP5049578B2 (ja) | 2006-12-15 | 2012-10-17 | 株式会社東芝 | 蒸気タービン |
US20090060735A1 (en) * | 2007-08-31 | 2009-03-05 | General Electric Company | Turbine rotor apparatus and system |
EP2379845A4 (de) * | 2008-12-18 | 2013-08-07 | Gkn Aerospace Sweden Ab | Gasturbinenverbundteil zur verwendung in einem gasturbinentriebwerk |
EP3486430A1 (de) * | 2017-11-17 | 2019-05-22 | Siemens Aktiengesellschaft | Integral geformte turbinenrotorstufe |
US10927767B2 (en) | 2018-09-24 | 2021-02-23 | Rolls-Royce Corporation | Exoskeletal gas turbine engine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR876194A (fr) * | 1939-08-04 | 1942-10-29 | Sulzer Ag | Rotor soudé pour turbines à vapeur ou à gaz |
US2369051A (en) * | 1942-07-10 | 1945-02-06 | Sulzer Ag | Welded turbine rotor |
GB612097A (en) * | 1946-10-09 | 1948-11-08 | English Electric Co Ltd | Improvements in and relating to the cooling of gas turbine rotors |
GB646483A (en) * | 1948-04-13 | 1950-11-22 | Hubert Thomas Lewis | Improvements in and relating to turbine and like rotors |
US2637521A (en) * | 1949-03-01 | 1953-05-05 | Elliott Co | Gas turbine rotor and method of welding rotor disks together |
DE4324034A1 (de) * | 1993-07-17 | 1995-01-19 | Abb Management Ag | Gasturbine mit gekühltem Rotor |
US5593274A (en) * | 1995-03-31 | 1997-01-14 | General Electric Co. | Closed or open circuit cooling of turbine rotor components |
-
1996
- 1996-11-21 DE DE19648185A patent/DE19648185A1/de not_active Withdrawn
-
1997
- 1997-10-31 DE DE59706955T patent/DE59706955D1/de not_active Expired - Fee Related
- 1997-10-31 EP EP97810814A patent/EP0844367B1/de not_active Expired - Lifetime
- 1997-11-21 US US08/975,823 patent/US5993154A/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6519849B2 (en) | 1998-12-10 | 2003-02-18 | Alstom (Switzerland) Ltd | Method for the manufacture of a welded rotor of a fluid-flow machine |
EP1342882A2 (de) * | 1998-12-10 | 2003-09-10 | ALSTOM (Switzerland) Ltd | Verfahren zur Herstellung eines geschweissten Rotors einer Strömungsmaschine |
US6687994B2 (en) | 1998-12-10 | 2004-02-10 | Alstom Technology Ltd. | Method for the manufacture of a welded rotor of a fluid-flow machine |
US8517676B2 (en) | 2009-11-04 | 2013-08-27 | Alstom Technology Ltd | Welded rotor of a gas turbine engine compressor |
Also Published As
Publication number | Publication date |
---|---|
DE19648185A1 (de) | 1998-05-28 |
US5993154A (en) | 1999-11-30 |
EP0844367A1 (de) | 1998-05-27 |
DE59706955D1 (de) | 2002-05-16 |
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