EP1860279A1 - Welded LP-turbine shaft - Google Patents

Welded LP-turbine shaft Download PDF

Info

Publication number
EP1860279A1
EP1860279A1 EP06010925A EP06010925A EP1860279A1 EP 1860279 A1 EP1860279 A1 EP 1860279A1 EP 06010925 A EP06010925 A EP 06010925A EP 06010925 A EP06010925 A EP 06010925A EP 1860279 A1 EP1860279 A1 EP 1860279A1
Authority
EP
European Patent Office
Prior art keywords
inflow
shaft
gew
inflow part
region
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Withdrawn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
EP06010925A
Other languages
German (de)
French (fr)
Inventor
Thorsten-Ulf Dr. Kern
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP06010925A priority Critical patent/EP1860279A1/en
Priority to EP07712292A priority patent/EP2024605A1/en
Priority to JP2009511422A priority patent/JP5036811B2/en
Priority to CN200780019467.9A priority patent/CN101454541B/en
Priority to PCT/EP2007/051743 priority patent/WO2007137884A1/en
Priority to US12/227,468 priority patent/US8083492B2/en
Publication of EP1860279A1 publication Critical patent/EP1860279A1/en
Withdrawn legal-status Critical Current

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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0466—Nickel
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/13—Refractory metals, i.e. Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
    • F05D2300/131—Molybdenum
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/13—Refractory metals, i.e. Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
    • F05D2300/132—Chromium
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S464/00—Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts
    • Y10S464/902—Particular material

Definitions

  • the invention relates to a turbomachine which has a low-pressure region, with at least one shaft, wherein the low-pressure region has an inflow region.
  • Such a turbomachine is designed for example as a steam turbine.
  • Such turbomachines have an inflow region and adjoining flow regions or outflow regions, the flow regions having a blade lattice formed from rotor blades and guide vanes.
  • double-flow turbomachines are formed, wherein a flow medium, for example steam, flows over the inflow area into the flow areas arranged to the left and right in the axial direction or in the longitudinal direction flows.
  • a flow medium for example steam
  • the flow medium flows in the opposite direction with respect to the respective other flow region.
  • the invention is therefore based on the object to improve a turbomachine of the type mentioned, in particular the at least one shaft in the low pressure region of the turbomachine with simple means to the effect that these higher temperatures or operating temperatures can be suspended.
  • the shaft has a heat-resistant material at least at its inlet part arranged in the inflow region.
  • the inflow part preferably comprises a material of the 1-2.5% Cr steels, in particular a material with the designation 22CrNiMoWV8-8 (material number 1.6945).
  • the shaft at opposite to the inflow arranged Abström a cold-tough material, preferably a material of 2-4% Ni steels, in particular a material 26NiCrMoV14-5 (material number 1.6957).
  • a cold-tough material preferably a material of 2-4% Ni steels, in particular a material 26NiCrMoV14-5 (material number 1.6957).
  • 26NiCrMoV11-5 material number 1.6948) and / or 22NiCrMo9-9 have.
  • the shaft is formed in several parts from an inflow part and an outflow part assigned to it on both sides.
  • the inflow part is connected with its oppositely arranged ends cohesively with the respective further outflow parts.
  • a welded connection can preferably be used.
  • a gas-shielded welding process in particular a TIG welding
  • TIG narrow gap welding it is also possible to carry out a TIG narrow gap welding.
  • UP Unterpulverversch spaung
  • combined welding processes can also be carried out, the "root position" being carried out, for example, in the TIG process and the "filling or covering layers" in the UP process.
  • the inflow part is arranged in the region of the steam inflow of the turbomachine, the outflow parts being arranged laterally in the longitudinal direction of the turbomachine, ie in the outflow region.
  • the inflow part consists of the material 22CrMoNiWV8-8, wherein the outflow parts can each consist of one of the following exemplary materials 26NiCrMoV14-5, 26NiCrMoV11-5 and / or 22CrNiM09-9.
  • the inflow part of the material 22CrMoNiWV8-8 can be conveniently produced as a disk body with a diameter of up to 3000mm, wherein for the disk body no ESU melting ( E lektro- S chlacke- U mschmelzung) is necessary even with the largest shaft diameters, as well Conventional melting process sufficiently homogeneous properties can be achieved.
  • the disk body becomes corresponding machined to fulfill its function in the flow cross-section.
  • the inflow can be easily produced as a disc body and the special ESU-melting (which is necessary for monobloc waves of the same diameter) can be omitted, also advantageously increases the number of suppliers for the procurement of the inflow due to the elimination of required manufacturing standards and tolerances or special requirements for suppliers.
  • the inflow part advantageously fulfills the necessary high long-term strength and toughness requirement in turbomachines, in particular in the inflow region.
  • Figure 1 shows a shaft 1 of a turbomachine in a half-section up to a central axis X.
  • the shaft 1 is mirror-inverted to the central axis X executed.
  • the shaft 1 is part of a double-flow low pressure area.
  • the turbomachine may be, for example, a steam turbine. The possibly upstream medium-pressure areas or high-pressure areas of the turbomachine are not shown.
  • the turbomachine has an inflow region, which is represented by the arrow 2.
  • a medium for example, steam flows into the low-pressure region of the turbomachine, wherein the medium flow, with respect to the approximately centrally arranged inflow region 2, is divided into two flow directions 3.
  • Each partial flow 3 flows through a blade grid, not shown.
  • the low-pressure region of the fluid-flow machine thus has an inflow region 2 and two flow regions or outflow regions 4 arranged laterally to the latter, seen in the longitudinal direction or axial direction.
  • the shaft 1 is formed in several parts from an inflow part 6 and two outflow parts 7, which are seen laterally in the longitudinal direction.
  • the inflow part 6 is materially connected to the respectively laterally arranged outflow parts 7.
  • the cohesive connection can be designed as a welded connection.
  • the TIG process may be provided, preferably as TIG narrow gap welding.
  • a submerged arc welding (UP) can be provided.
  • the respective weld bears the reference numeral 8.
  • the inflow part 6 is made as a disk body, which consists of the material 22CrNiMoWV8-8.
  • FIG. 2 shows a temperature diagram in the longitudinal direction of the shaft 1.
  • the shaft 1 in the inflow region 2 of the turbomachine can be operated over a temperature> 350 ° C.
  • the temperature decreases seen in the longitudinal direction in both outflow areas 4.
  • the temperature curve 9 achievable by means of the material 22CrNiMoWV8-8 used in accordance with the invention is shown in dashed lines, wherein below a conventional temperature curve 10 is shown, which does not exceed the amount of 350 ° C.
  • an improved shaft 1 which can be exposed to higher temperature loads (> 350 ° C.) in the inflow region on account of the material 22CrNiMoWV8-8 of the inflow part 6 used according to the invention.
  • the welds 8 are conveniently arranged in a temperature range ⁇ 350 ° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Arc Welding In General (AREA)

Abstract

The machine has a shaft (1) formed from an inflow part (6) and an outflow part (7), where the parts are firmly bonded with one another by a welded joint (8). The inflow part is manufactured as a disk body. The shaft is provided in a low-pressure zone, which includes an inflow zone (2), where a medium e.g. vapor, flows in the low-pressure zone. The shaft includes a heat-resistant material e.g. chromium, molybdenum, nickel, tungsten and vanadium composition, at the inflow part which is arranged in the inflow zone.

Description

Die Erfindung betrifft eine Strömungsmaschine, die einen Niederdruckbereich aufweist, mit zumindest einer Welle, wobei der Niederdruckbereich einen Einströmbereich aufweist.The invention relates to a turbomachine which has a low-pressure region, with at least one shaft, wherein the low-pressure region has an inflow region.

Eine derartige Strömungsmaschine ist beispielsweise als Dampfturbine ausgeführt. Derartige Strömungsmaschinen weisen einen Einströmbereich und sich daran anschließende Strömungsbereiche bzw. Abströmbereiche auf, wobei die Strömungsbereiche ein aus Lauf- und Leitschaufeln gebildetes Schaufelgitter aufweisen.Such a turbomachine is designed for example as a steam turbine. Such turbomachines have an inflow region and adjoining flow regions or outflow regions, the flow regions having a blade lattice formed from rotor blades and guide vanes.

Ist ein solches Schaufelgitter in axialer Richtung gesehen jeweils links und rechts des Einströmbereiches angeordnet, sind so genannte doppelflutige Strömungsmaschinen gebildet, wobei ein Strömungsmedium, beispielsweise Dampf, über den Einströmbereich in die in axialer Richtung bzw. in Längsrichtung gesehen jeweils links und rechts davon angeordneten Strömungsbereiche strömt.If such a blade grid is arranged in the axial direction to the left and to the right of the inflow area, so-called double-flow turbomachines are formed, wherein a flow medium, for example steam, flows over the inflow area into the flow areas arranged to the left and right in the axial direction or in the longitudinal direction flows.

In dem in axialer Richtung gesehen jeweils links und rechts des Einströmbereiches angeordneten Strömungsbereichen strömt das Strömungsmedium bezogen auf den jeweils anderen Strömungsbereich in entgegengesetzter Richtung.In the flow regions arranged in the axial direction to the left and right of the inflow region, the flow medium flows in the opposite direction with respect to the respective other flow region.

Bekannt ist beispielsweise für doppelflutige Strömungsmaschinen die Welle aus dem Werkstoff 26NiCrMoV14-5 zu bilden. Als ein Hauptnachteil dieses bekannten Werkstoffs ist anzusehen, dass die Einsatztemperatur aus Gründen der Versprödung und des Zeitstandverhaltens auf T < 350°C zu beschränken ist.For example, for double-flow turbomachines, it is known to form the shaft of the material 26NiCrMoV14-5. As a major disadvantage of this known material is to be considered that the operating temperature for reasons of embrittlement and the creep behavior to T <350 ° C is limited.

Um den Wirkungsgrad der Strömungsmaschine verbessern zu können, wurde insbesondere der Niederdruckteil, bzw. die Welle im Niederdruckbereich theoretisch dahingehend diskutiert, dass ein diesbezüglich verbesserter Werkstoff eingesetzt werden könnte. Dieser theoretisch andiskutierte Werkstoff ist der Werkstoff 26NiCrMoV14-5mod (Superclean). Bei diesem Werkstoff ist die Versprödungsneigung zwar reduziert, wohingegen das Problem des gefügeabhängigen Zeitstandverhaltens aber nicht verbessert wird. Der Einsatz des andiskutierten modifizierten Werkstoffs ist theoretisch möglich, wobei die Werkstoffkosten allerdings um mehr als ca. 25 Prozent steigen, und Daten zum Zeitstandverhalten Rp0,2 > 600 MPa nicht ausgewertet vorliegen.In order to be able to improve the efficiency of the turbomachine, in particular the low-pressure part, or the shaft in the low-pressure region, was theoretically discussed to the effect that that a material improved in this respect could be used. This theoretically discussed material is the material 26NiCrMoV14-5mod (Superclean). Although the embrittlement tendency is reduced for this material, the problem of bond-dependent creep behavior is not improved. The use of the discussed modified material is theoretically possible, although the material costs increase by more than approx. 25 percent, and data on the creep rupture Rp0.2> 600 MPa are not available.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Strömungsmaschine der eingangs genannten Art, insbesondere die zumindest eine Welle im Niederdruckbereich der Strömungsmaschine mit einfachen Mitteln dahingehend zu verbessern, dass diese höheren Temperaturen bzw. Einsatztemperaturen ausgesetzt werden kann.The invention is therefore based on the object to improve a turbomachine of the type mentioned, in particular the at least one shaft in the low pressure region of the turbomachine with simple means to the effect that these higher temperatures or operating temperatures can be suspended.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass die Welle zumindest an ihrem, im Einströmbereich angeordneten Einströmteil einen warmfesten Werkstoff aufweist. Bevorzugt weist der Einströmteil dabei einen Werkstoff der 1-2,5% Cr-Stähle, insbesondere einen Werkstoff mit der Bezeichnung 22CrNiMoWV8-8 (Werkstoffnummer 1.6945) auf.According to the invention, this object is achieved in that the shaft has a heat-resistant material at least at its inlet part arranged in the inflow region. In this case, the inflow part preferably comprises a material of the 1-2.5% Cr steels, in particular a material with the designation 22CrNiMoWV8-8 (material number 1.6945).

Günstig im Sinne der Erfindung ist, wenn die Welle an gegenüberliegend zum Einströmteil angeordneten Abströmteilen einen kaltzähen Werkstoff, bevorzugt einen Werkstoff der 2-4% Ni-Stähle, insbesondere einen Werkstoff 26NiCrMoV14-5 (Werkstoffnummer 1.6957)aufweist. Natürlich kann der jeweilige Abströmteil aber auch beispielsweise einen Werkstoff 26NiCrMoV11-5 (Werkstoffnummer 1.6948) und/oder 22NiCrMo9-9 aufweisen.Favorable for the purposes of the invention is when the shaft at opposite to the inflow arranged Abströmteilen a cold-tough material, preferably a material of 2-4% Ni steels, in particular a material 26NiCrMoV14-5 (material number 1.6957). Of course, the respective outflow part but also, for example, a material 26NiCrMoV11-5 (material number 1.6948) and / or 22NiCrMo9-9 have.

Zweckmäßig im Sinne der Erfindung ist, wenn die Welle mehrteilig aus einem Einströmteil und einem diesem jeweils beidseitig zugeordneten Abströmteil gebildet ist. Das Einströmteil ist dabei mit seinen gegenüberliegend angeordneten Enden stoffschlüssig mit den jeweils weiteren Abströmteilen verbunden. Als stoffschlüssige Verbindung kann bevorzugt eine Schweißverbindung eingesetzt werden. Denkbar ist hierbei, wenn als Schweißverfahren ein Schutzgasschweißverfahren, insbesondere eine WIG-Schweißung durchgeführt wird. Möglich ist auch, eine WIG-Engspaltschweißung durchzuführen. Möglich ist aber auch eine Unterpulverschweißung (UP) durchzuführen. Natürlich können aber auch kombinierte Schweißverfahren durchgeführt werden, wobei die "Wurzellage" beispielsweise im WIG-Verfahren und die "Füll- bzw. Decklagen" im UP-Verfahren ausgeführt sind.It is expedient in the context of the invention if the shaft is formed in several parts from an inflow part and an outflow part assigned to it on both sides. The inflow part is connected with its oppositely arranged ends cohesively with the respective further outflow parts. As a material connection, a welded connection can preferably be used. It is conceivable here if a gas-shielded welding process, in particular a TIG welding, is carried out as the welding process. It is also possible to carry out a TIG narrow gap welding. But it is also possible to perform a Unterpulververschweißung (UP). Of course, however, combined welding processes can also be carried out, the "root position" being carried out, for example, in the TIG process and the "filling or covering layers" in the UP process.

Der Einströmteil ist im Bereich der Dampfeinströmung der Strömungsmaschine angeordnet, wobei die Abströmteile in Längsrichtung der Strömungsmaschine jeweils seitlich dazu, also im Abströmbereich angeordnet sind. Im Bereich der Dampfeinströmung, also am Einströmteil herrschen die höchsten Temperaturen an der Welle, bzw. an deren Einströmteil. Günstiger Weise ist daher vorgesehen, dass der Einströmteil aus dem Werkstoff 22CrMoNiWV8-8 besteht, wobei die Abströmteile jeweils aus einem der folgenden beispielhaften Werkstoffen 26NiCrMoV14-5, 26NiCrMoV11-5 und/oder 22CrNiM09-9 bestehen können.The inflow part is arranged in the region of the steam inflow of the turbomachine, the outflow parts being arranged laterally in the longitudinal direction of the turbomachine, ie in the outflow region. In the area of the steam inflow, that is to say on the inflow part, the highest temperatures prevail on the shaft or on its inflow part. Conveniently, it is therefore provided that the inflow part consists of the material 22CrMoNiWV8-8, wherein the outflow parts can each consist of one of the following exemplary materials 26NiCrMoV14-5, 26NiCrMoV11-5 and / or 22CrNiM09-9.

Insgesamt sind mit dem verwendeten Werkstoff 22CrMoNiWV8-8 für den Einströmbereich des Niederdruckteils der Welle, also des Einströmteils höhere Einströmtemperaturen (T > 350°C) realisierbar.Overall, with the used material 22CrMoNiWV8-8 for the inflow region of the low pressure part of the shaft, so the inflow higher inflow temperatures (T> 350 ° C) can be realized.

Der Einströmteil aus dem Werkstoff 22CrMoNiWV8-8 kann dabei günstigerweise als Scheibenkörper mit einem Durchmesser bis zu 3000mm hergestellt werden, wobei für den Scheibenkörper keine ESU-Erschmelzung (Elektro-Schlacke-Umschmelzung) auch bei größten Wellendurchmessern notwendig ist, da auch über konventionelle Erschmelzungsverfahren ausreichend homogene Eigenschaften erreichbar sind. Der Scheibenkörper wird entsprechend bearbeitet, um seine Funktion im Strömungsquerschnitt zu erfüllen.The inflow part of the material 22CrMoNiWV8-8 can be conveniently produced as a disk body with a diameter of up to 3000mm, wherein for the disk body no ESU melting ( E lektro- S chlacke- U mschmelzung) is necessary even with the largest shaft diameters, as well Conventional melting process sufficiently homogeneous properties can be achieved. The disk body becomes corresponding machined to fulfill its function in the flow cross-section.

Dadurch, dass der Einströmteil einfach als Scheibenkörper hergestellt werden kann und die spezielle ESU-Erschmelzung (die für Monoblockwellen gleichen Durchmessers notwendig ist) entfallen kann, erhöht sich auch vorteilhaft die Lieferantenanzahl für die Beschaffung des Einströmteils aufgrund des Wegfalls von erforderlichen Herstellungsstandards und Toleranzen bzw. spezieller Anforderungen an die Lieferanten.The fact that the inflow can be easily produced as a disc body and the special ESU-melting (which is necessary for monobloc waves of the same diameter) can be omitted, also advantageously increases the number of suppliers for the procurement of the inflow due to the elimination of required manufacturing standards and tolerances or special requirements for suppliers.

Der Einströmteil erfüllt vorteilhaft aufgrund des neuen Werkstoffs bzw. der erfindungsgemäßen Verwendung des Werkstoffs 22CrMoNiWV8-8 die notwendig hohe Langzeitfestigkeit und Zähigkeitsanforderung in Strömungsmaschinen insbesondere im Einströmbereich.Due to the new material or the use according to the invention of the material 22CrMoNiWV8-8, the inflow part advantageously fulfills the necessary high long-term strength and toughness requirement in turbomachines, in particular in the inflow region.

Eine Verschweißung der beiden unterschiedlichen Werkstoffe, also des Werkstoffs des Einströmteils mit dem Werkstoff der beiden gegenüberliegenden Abströmteile ist bereits bekannt, wobei die entstehenden Schweißnähte selbstverständlich vorzugsweise in den Bereich mit einer Temperatur T < 350°C angeordnet werden können.A welding of the two different materials, ie the material of the inflow part with the material of the two opposite outflow parts is already known, wherein the resulting welds can of course preferably be arranged in the region with a temperature T <350 ° C.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen, sowie der folgenden Figurenbeschreibung offenbart. Es zeigen:

Fig. 1
eine Welle eines Niederdruckbereiches einer Strömungsmaschine im Halbquerschnitt, und
Fig. 2
ein Temperaturdiagramm.
Further advantageous embodiments of the invention are disclosed in the dependent claims, as well as the following description of the figures. Show it:
Fig. 1
a wave of a low-pressure region of a turbomachine in the half-section, and
Fig. 2
a temperature diagram.

Figur 1 zeigt eine Welle 1 einer Strömungsmaschine in einem Halbquerschnitt bis zu einer Mittelachse X. Selbstverständlich ist die Welle 1 spiegelbildlich zur Mittelachse X ausgeführt. Die Welle 1 ist Bestandteil eines doppelflutigen Niederdruckbereichs. Die Strömungsmaschine kann z.B. eine Dampfturbine sein. Die möglicherweise vorgeschalteten Mitteldruckbereiche bzw. Hochdruckbereiche der Strömungsmaschine sind nicht dargestellt.Figure 1 shows a shaft 1 of a turbomachine in a half-section up to a central axis X. Of course, the shaft 1 is mirror-inverted to the central axis X executed. The shaft 1 is part of a double-flow low pressure area. The turbomachine may be, for example, a steam turbine. The possibly upstream medium-pressure areas or high-pressure areas of the turbomachine are not shown.

Die Strömungsmaschine weist einen Einströmbereich auf, der Mittels des Pfeils 2 dargestellt ist. Als Medium strömt beispielsweise Dampf in den Niederdruckbereich der Strömungsmaschine, wobei sich der Mediumstrom, bezogen auf den etwa mittig angeordneten Einströmbereich 2 in zwei Strömungsrichtungen 3 aufteilt. Jeder Teilstrom 3 durchströmt ein nicht dargestelltes Schaufelgitter. Der Niederdruckbereich der Strömungsmaschine weist somit einen Einströmbereich 2 und zwei, in Längsrichtung bzw. axialer Richtung gesehen, seitlich zu diesem angeordnete Strömungsbereiche bzw. Abströmbereiche 4 auf.The turbomachine has an inflow region, which is represented by the arrow 2. As a medium, for example, steam flows into the low-pressure region of the turbomachine, wherein the medium flow, with respect to the approximately centrally arranged inflow region 2, is divided into two flow directions 3. Each partial flow 3 flows through a blade grid, not shown. The low-pressure region of the fluid-flow machine thus has an inflow region 2 and two flow regions or outflow regions 4 arranged laterally to the latter, seen in the longitudinal direction or axial direction.

Die Welle 1 ist mehrteilig aus einem Einströmteil 6 und zwei in Längsrichtung gesehen jeweils seitlich dazu angeordneten Abströmteilen 7 gebildet. Das Einströmteil 6 ist mit den jeweils seitlich angeordneten Abströmteilen 7 stoffschlüssig verbunden. Die stoffschlüssige Verbindung kann als Schweißverbindung ausgeführt sein. Als Schweißverfahren kann das WIG-Verfahren, vorzugsweise als WIG-Engspaltschweißung vorgesehen sein. Natürlich kann auch eine Unterpulver-Schweißung (UP) vorgesehen sein. Die jeweilige Schweißnaht trägt das Bezugszeichen 8.The shaft 1 is formed in several parts from an inflow part 6 and two outflow parts 7, which are seen laterally in the longitudinal direction. The inflow part 6 is materially connected to the respectively laterally arranged outflow parts 7. The cohesive connection can be designed as a welded connection. As a welding process, the TIG process may be provided, preferably as TIG narrow gap welding. Of course, a submerged arc welding (UP) can be provided. The respective weld bears the reference numeral 8.

Der Einströmteil 6 ist als Scheibenkörper hergestellt, der aus dem Werkstoff 22CrNiMoWV8-8 besteht. Der Werkstoff 22CrNiMoWV8-8 umfasst 0,20-0,24 Gew.-% C; <=0,10 Gew.-% Si; 0,60-0,80 Gew.-% Mn; <=0,01 Gew.-% P; <=0,007 Gew.-% S; 2,00-2,20 Gew.-% Cr; 0,80-0,90 Gew.-% Mo; 0,70-0,80 Gew.-% Ni; 0,25-0,35 Gew.-% V und 0,60-0,70 Gew.-% W.The inflow part 6 is made as a disk body, which consists of the material 22CrNiMoWV8-8. The material 22CrNiMoWV8-8 comprises 0.20-0.24 wt .-% C; <= 0.10 wt% Si; 0.60-0.80 wt% Mn; <= 0.01 wt% P; <= 0.007 wt% S; 2.00-2.20% by weight Cr; 0.80-0.90 wt% Mo; 0.70-0.80 wt% Ni; 0.25-0.35 wt% V and 0.60-0.70 wt% W.

Die Abströmteile 7 sind jeweils aus einem der folgenden Werkstoffe herstellbar:

  • 26NiCrMoV14-5: Dieser Werkstoff umfasst 0,22-0,32 Gew.-% C; 0<=0,15 Gew.-% Si; 0,15-0,40 Gew.-% Mn; <=0,010 Gew.-% P; <=0,007 Gew.-% S; 1,20-1,80 Gew.-% Cr; 0,25-0,45 Gew.-% Mo; 3,40-4,00 Gew.-% Ni und 0,05-0,15 Gew.-% V.
  • 26NiCrMoV11-5: Dieser Werkstoff umfasst 0,22-0,32 Gew.-% C; <=0,15 Gew.-% Si; 0,15-0,40 Gew.-% Mn; <=0,010 Gew.-% P; <=0,007 Gew.-% S; 1,20-1,80 Gew.-% Cr; 0,25-0,45 Gew.-% Mo; 2,40-3,10 Gew.-% Ni und 0,05-0,15 Gew.-% V.
  • 22CrNiMo9-9: Dieser Werkstoff umfasst 0,22-0,25 Gew.-% C; <=0,15 Gew.-% Si; 0,15-0,40 Gew.-% Mn; <=0,010 Gew.-% P; <=0,007 Gew.-% S; 2,00-2,60 Gew.-% Cr; 0,50-0,90 Gew.-% Mo; 2,00-2,50 Gew.-% Ni und 0,05-0,15 Gew.-% V.
The outflow parts 7 can each be produced from one of the following materials:
  • 26NiCrMoV14-5: This material comprises 0.22-0.32% by weight C; 0 <= 0.15 wt% Si; 0.15-0.40 wt% Mn; <= 0.010 wt% P; <= 0.007 wt% S; 1.20-1.80 wt% Cr; 0.25-0.45 wt% Mo; 3.40-4.00 wt% Ni and 0.05-0.15 wt% V.
  • 26NiCrMoV11-5: This material comprises 0.22-0.32 wt% C; <= 0.15 wt% Si; 0.15-0.40 wt% Mn; <= 0.010 wt% P; <= 0.007 wt% S; 1.20-1.80 wt% Cr; 0.25-0.45 wt% Mo; 2.40-3.10% by weight of Ni and 0.05-0.15% by weight of V.
  • 22CrNiMo9-9: This material comprises 0.22-0.25 wt% C; <= 0.15 wt% Si; 0.15-0.40 wt% Mn; <= 0.010 wt% P; <= 0.007 wt% S; 2.00-2.60 wt.% Cr; 0.50-0.90 wt% Mo; 2.00-2.50 wt.% Ni and 0.05-0.15 wt.% V.

In Figur 2 ist ein Temperaturdiagramm in Längsrichtung der Welle 1 dargestellt. Mittels des erfindungsgemäß verwendeten Werkstoffs 22CrNiMoWV8-8 des Einströmteils 6 kann die Welle 1 im Einströmbereich 2 der Strömungsmaschine über eine Temperatur >350°C betrieben werden. Die Temperatur nimmt in Längsrichtung gesehen in beiden Abströmbereichen 4 ab. In Figur 2 ist die mittels des erfindungsgemäß verwendeten Werkstoffs 22CrNiMoWV8-8 erreichbare Temperaturkurve 9 gestrichelt dargestellt, wobei unterhalb eine herkömmliche Temperaturkurve 10 dargestellt ist, welche den Betrag von 350°C nicht übersteigt.FIG. 2 shows a temperature diagram in the longitudinal direction of the shaft 1. By means of the material 22CrNiMoWV8-8 of the inflow part 6 used according to the invention, the shaft 1 in the inflow region 2 of the turbomachine can be operated over a temperature> 350 ° C. The temperature decreases seen in the longitudinal direction in both outflow areas 4. In FIG. 2, the temperature curve 9 achievable by means of the material 22CrNiMoWV8-8 used in accordance with the invention is shown in dashed lines, wherein below a conventional temperature curve 10 is shown, which does not exceed the amount of 350 ° C.

Somit ist eine verbesserte Welle 1 zur Verfügung gestellt, welche im Einströmbereich aufgrund des erfindungsgemäß verwendeten Werkstoffs 22CrNiMoWV8-8 des Einströmteils 6 höheren Temperaturbelastungen (>350°C) ausgesetzt werden kann. Die Schweißnähte 8 sind dabei günstiger Weise in einem Temperaturbereich <350°C angeordnet.Thus, an improved shaft 1 is provided, which can be exposed to higher temperature loads (> 350 ° C.) in the inflow region on account of the material 22CrNiMoWV8-8 of the inflow part 6 used according to the invention. The welds 8 are conveniently arranged in a temperature range <350 ° C.

Claims (7)

Strömungsmaschine,
die einen Niederdruckbereich aufweist,
mit zumindest einer Welle (1),
wobei der Niederdruckbereich einen Einströmbereich (2) aufweist,
dadurch gekennzeichnet, dass
die Welle (1) zumindest an ihrem im Einströmbereich (2) angeordneten Einströmteil (6) einen warmfesten Werkstoff aufweist.Flow machine,
which has a low pressure area,
with at least one shaft (1),
wherein the low-pressure region has an inflow region (2),
characterized in that
the shaft (1) has a heat-resistant material at least on its inflow part (6) arranged in the inflow region (2). Strömungsmaschine nach Anspruch 1,
dadurch gekennzeichnet, dass
die Welle (1) an ihrem Einströmteil einen Werkstoff 22CrMoNiWV8-8 aufweistTurbomachine according to claim 1,
characterized in that
the shaft (1) has a material 22CrMoNiWV8-8 at its inflow part Strömungsmaschine nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass
die Welle (1) an gegenüberliegend zum Einströmteil (6) angeordneten Abströmteilen (7) einen kaltzähen Werkstoff aufweist.Turbomachine according to claim 1 or 2,
characterized in that
the shaft (1) has a cold-tough material at outflow parts (7) arranged opposite the inflow part (6). Strömungsmaschine einem der vorhergehenden Ansprüchen,
dadurch gekennzeichnet, dass
die Welle (1) an gegenüberliegend zum Einströmteil (6) angeordneten Abströmteilen (7) einen Werkstoff 26NiCrMoV14-5 und/oder 26NiCrMoV11-9 und/oder 22CrNiMo9-9 aufweist.Turbomachine one of the preceding claims,
characterized in that
the shaft (1) at opposite to the inflow part (6) arranged outflow parts (7) has a material 26NiCrMoV14-5 and / or 26NiCrMoV11-9 and / or 22CrNiMo9-9. Strömungsmaschine nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die Welle (1) mehrteilig aus dem Einströmteil (6) und einem diesem jeweils beidseitig zugeordneten Abströmteil (7) gebildet ist.Turbomachine according to one of the preceding claims,
characterized in that
the shaft (1) is formed in several parts from the inflow part (6) and an outflow part (7) associated therewith on both sides. Strömungsmaschine nach Anspruch 5,
dadurch gekennzeichnet, dass
der Einströmteil (6) mit seinen gegenüberliegenden Abströmteilen (7) stoffschlüssig verbunden ist.Turbomachine according to claim 5,
characterized in that
the inflow part (6) is materially connected to its opposite outflow parts (7). Strömungsmaschine nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
der Einströmteil (6) als Scheibenkörper hergestellt ist.Turbomachine according to one of the preceding claims,
characterized in that
the inflow part (6) is produced as a disk body.
EP06010925A 2006-05-26 2006-05-26 Welded LP-turbine shaft Withdrawn EP1860279A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP06010925A EP1860279A1 (en) 2006-05-26 2006-05-26 Welded LP-turbine shaft
EP07712292A EP2024605A1 (en) 2006-05-26 2007-02-23 Welded low-pressure turbine shaft
JP2009511422A JP5036811B2 (en) 2006-05-26 2007-02-23 Welded low pressure turbine shaft
CN200780019467.9A CN101454541B (en) 2006-05-26 2007-02-23 Welded low-pressure turbine shaft
PCT/EP2007/051743 WO2007137884A1 (en) 2006-05-26 2007-02-23 Welded low-pressure turbine shaft
US12/227,468 US8083492B2 (en) 2006-05-26 2007-02-23 Welded low-pressure turbine shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06010925A EP1860279A1 (en) 2006-05-26 2006-05-26 Welded LP-turbine shaft

Publications (1)

Publication Number Publication Date
EP1860279A1 true EP1860279A1 (en) 2007-11-28

Family

ID=37075789

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06010925A Withdrawn EP1860279A1 (en) 2006-05-26 2006-05-26 Welded LP-turbine shaft
EP07712292A Ceased EP2024605A1 (en) 2006-05-26 2007-02-23 Welded low-pressure turbine shaft

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP07712292A Ceased EP2024605A1 (en) 2006-05-26 2007-02-23 Welded low-pressure turbine shaft

Country Status (5)

Country Link
US (1) US8083492B2 (en)
EP (2) EP1860279A1 (en)
JP (1) JP5036811B2 (en)
CN (1) CN101454541B (en)
WO (1) WO2007137884A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100202891A1 (en) * 2008-08-11 2010-08-12 Shin Nishimoto Low-pressure turbine rotor
US8925894B2 (en) 2012-02-17 2015-01-06 Vetco Gray Inc. Ball valve enclosure and drive mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106574504B (en) 2014-10-10 2018-06-01 三菱日立电力系统株式会社 The manufacturing method of axis body

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1448063A (en) * 1973-01-26 1976-09-02 Alsthom Cgee Turbine rotor
DE2906371A1 (en) * 1979-02-19 1980-08-21 Kloeckner Werke Ag Turbine rotor for high pressure and satd. steam turbines - made by successive electroslag remelting of two steel electrodes of different compsns.
US20020081197A1 (en) * 2000-12-27 2002-06-27 Crawmer Gerald Richard Fabricating turbine rotors composed of separate components
WO2004051056A1 (en) * 2002-12-05 2004-06-17 Siemens Aktiengesellschaft Turbine shaft and production of a turbine shaft
WO2004101209A1 (en) * 2003-05-14 2004-11-25 Alstom Technology Ltd Method for welding together structural components and rotor produced according to said method
EP1577494A1 (en) * 2004-03-17 2005-09-21 Siemens Aktiengesellschaft Welded steam turbine shaft and its method of manufacture
WO2006048401A1 (en) * 2004-11-02 2006-05-11 Alstom Technology Ltd Optimised turbine stage for a turbine engine and layout method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001050002A (en) * 1999-08-04 2001-02-23 Toshiba Corp Low pressure turbine rotor and manufacturing method for the same, and steam turbine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1448063A (en) * 1973-01-26 1976-09-02 Alsthom Cgee Turbine rotor
DE2906371A1 (en) * 1979-02-19 1980-08-21 Kloeckner Werke Ag Turbine rotor for high pressure and satd. steam turbines - made by successive electroslag remelting of two steel electrodes of different compsns.
US20020081197A1 (en) * 2000-12-27 2002-06-27 Crawmer Gerald Richard Fabricating turbine rotors composed of separate components
WO2004051056A1 (en) * 2002-12-05 2004-06-17 Siemens Aktiengesellschaft Turbine shaft and production of a turbine shaft
WO2004101209A1 (en) * 2003-05-14 2004-11-25 Alstom Technology Ltd Method for welding together structural components and rotor produced according to said method
EP1577494A1 (en) * 2004-03-17 2005-09-21 Siemens Aktiengesellschaft Welded steam turbine shaft and its method of manufacture
WO2006048401A1 (en) * 2004-11-02 2006-05-11 Alstom Technology Ltd Optimised turbine stage for a turbine engine and layout method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100202891A1 (en) * 2008-08-11 2010-08-12 Shin Nishimoto Low-pressure turbine rotor
EP2312127A1 (en) * 2008-08-11 2011-04-20 Mitsubishi Heavy Industries, Ltd. Rotor for low-pressure turbine
EP2312127A4 (en) * 2008-08-11 2015-01-07 Mitsubishi Heavy Ind Ltd Rotor for low-pressure turbine
US8925894B2 (en) 2012-02-17 2015-01-06 Vetco Gray Inc. Ball valve enclosure and drive mechanism

Also Published As

Publication number Publication date
EP2024605A1 (en) 2009-02-18
CN101454541A (en) 2009-06-10
US20090263249A1 (en) 2009-10-22
JP2009538397A (en) 2009-11-05
WO2007137884A1 (en) 2007-12-06
JP5036811B2 (en) 2012-09-26
US8083492B2 (en) 2011-12-27
CN101454541B (en) 2011-09-07

Similar Documents

Publication Publication Date Title
DE60036253T2 (en) Steam turbine blade for a steam power plant
DE102012014068B3 (en) Austenitic steel alloy with excellent creep rupture strength and oxidation and corrosion resistance at elevated service temperatures
DE69726524T2 (en) Blading for a steam turbine of a gas-steam combined cycle power plant
AT411441B (en) COMPOSITE TOOL
EP2683523A1 (en) Nickel-based brazing foil, method for producing a brazing foil, object having a braze joint, and method for brazing
EP1033478A2 (en) Casing for thermal turbomachine
CH699716A1 (en) Component for high temperature steam turbine and high temperature steam turbine.
EP2551050B1 (en) Method for welding thin-walled pipes using peak temperature welding
DE69501907T2 (en) Process for producing a weld seam made of austenitic stainless steel
EP1567749B1 (en) Turbine shaft and production of a turbine shaft
EP1860279A1 (en) Welded LP-turbine shaft
DE102006062348A1 (en) Surface blasted steam generator components or power plant components
WO2010133244A1 (en) Ferritic martensitic iron-based alloy, a component and a process
DE3004758A1 (en) WELDING PROCESS FOR A STAINLESS STEEL COATING LAYER TO BE WELDED
DE102004024299A1 (en) Welded component
EP1577494A1 (en) Welded steam turbine shaft and its method of manufacture
EP3015715A1 (en) Stator vane ring for a turbomaschine and turbomaschine
DE3903588C2 (en)
DE69525621T2 (en) Steam turbine power plant and steam turbine
WO2011042007A1 (en) Joining method
EP1194603B1 (en) Austenitic ni-cr-mo-fe alloy
EP0174920A1 (en) Use of an alloy as welding filler material
EP2297517B1 (en) Membrane wall of a large-scale steam generator
EP2022951A1 (en) Method for manufacturing a turbine casing and turbine casing
DE69633140T2 (en) STEAM TURBINE

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

AKX Designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20080529

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566