EP1050357A1 - Gas tight connection between turbine elements - Google Patents

Gas tight connection between turbine elements Download PDF

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Publication number
EP1050357A1
EP1050357A1 EP99810387A EP99810387A EP1050357A1 EP 1050357 A1 EP1050357 A1 EP 1050357A1 EP 99810387 A EP99810387 A EP 99810387A EP 99810387 A EP99810387 A EP 99810387A EP 1050357 A1 EP1050357 A1 EP 1050357A1
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EP
European Patent Office
Prior art keywords
turbine
cast
turbine part
connection
fir tree
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.)
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Application number
EP99810387A
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German (de)
French (fr)
Inventor
Werner M. Balbach
Roger Hochstrasser
Stephan Konezciny
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.)
ABB Asea Brown Boveri Ltd
ABB AB
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ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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Application filed by ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Priority to EP99810387A priority Critical patent/EP1050357A1/en
Publication of EP1050357A1 publication Critical patent/EP1050357A1/en
Withdrawn legal-status Critical Current

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    • 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
    • F01D9/00—Stators
    • F01D9/06—Fluid supply conduits to nozzles or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/04—Casting in, on, or around objects which form part of the product for joining parts

Definitions

  • the invention relates to a vapor and gas-tight connection of turbine parts, the turbine parts are made of different types of metals that are heavy are weldable to each other. It is particularly a dense one Connection of a steel part with a nodular cast iron part.
  • Ductile iron is increasingly used for large castings of turbines, such as housing parts, with the aim of keeping casting costs as low as possible.
  • These nodular cast iron parts are often to be connected in a gas-tight and vapor-tight manner to steel parts such as connecting pipes, valve housings and the like. Since these materials are difficult to weld, such connections are realized, for example, by means of flanges in a non-positive and positive manner.
  • the flanges are calculated according to the forces that act on the connected parts and the expansion ratios, so that power transmission and tightness are guaranteed. However, they contain relaxing connecting elements, so that these connections must be regularly checked for tightness and maintained.
  • Ductile iron can be connected to steel by means of welding despite the high carbon content in nodular iron, such as by annealing or fusion welding with the help of additional materials.
  • annealing or fusion welding with the help of additional materials.
  • additional materials such as US 4, 426, 426 and EP 0 261 570.
  • both methods, annealing and fusion welding are very labor intensive and costly.
  • connection method is the pouring of steel pipes into Ductile iron parts as mentioned in EP 0 261 570.
  • bumps in the Steel part is trying a metallurgical connection between the two To manufacture materials.
  • they arise due to brittle edge zones often cracks on the steel part, which are a metallurgically tight connection render impossible.
  • the object of the invention to provide a gas and vapor tight connection to create between difficult to weld, metallic materials.
  • the invention is intended to avoid relaxing connecting elements and the labor and cost of manufacturing them compared to reduce the prior art mentioned.
  • the object is achieved according to claim 1 by a connection between a first, cast turbine part and a second, metallic turbine part, the second turbine part having a higher melting temperature than the cast part and an end part of the second part, which faces the first part, in second part is poured.
  • the second turbine part has an angled contour, in particular at the end part which is cast in the first turbine part.
  • the area of this angled contour is a multiple of the area of an end part of a cast turbine part, which has no angled contour and instead has flat surfaces.
  • the end section has a greatly enlarged surface that fits the cast turbine part adjoins.
  • the area is in particular a multiple of that Surface of an end section that has no contour and only flat surfaces like it for example when pouring a straight pipe end.
  • the Angling ensures a mechanical connection Anchoring the second part in the first part.
  • due to the strong enlarged interface between the two parts as well as the Angling creates a seal.
  • the cast turbine part is a housing part and the second metal turbine part is a connecting pipe.
  • the end part of the connecting pipe, which is cast in the first, cast turbine part has, in particular, a fir tree shape with several steps or "branches".
  • the fir tree shape is characterized in relation to its volume by its large area, which has strong angles up to 180 ° and more.
  • the housing part is made of, for example, nodular cast iron
  • the second turbine part is made of forged or cast steel, the fir tree-shaped end part of the second turbine part being produced, for example, by turning or milling.
  • the second turbine part has a melting temperature that is higher than that of the nodular cast iron part, so that the fir tree does not completely melt.
  • the second turbine part is embedded in the molding box of the spheroidal cast iron part, after which the first part is cast and the fir tree shape of the second part is enclosed.
  • the cast Christmas tree shape creates a strong mechanical, both positive and non-positive connection of the two parts and at the same time a tight connection.
  • the power transmission and the seal is guaranteed by the several steps or "branches" of the fir tree.
  • the strong angulation of the fir tree shape prevents leakage of steam and gas, as the multiple stages of the fir tree shape enable multiple seals. If there is a leak at one step of the fir tree, a seal can still be made at one of the other steps.
  • the effect of the mechanical connection and seal according to the invention is due to the fact that the materials of the two parts are similar in their expansion behavior, so that there are no gaps between the two parts and leaks when the temperature changes.
  • the fir tree-shaped interface also has the advantage of being a good one Pouring is possible and there are no local tensions Cracks and leaks.
  • the fir tree shape also proves to be advantageous with regard to casting shrinkage.
  • This shape generally has only a few notches on its surface, which can be smoothed out by the partial melting and so on can be reduced. This does not result in any cast-in areas special voltage increases.
  • the invention is applicable to the connection of nodular cast iron and steel but also for the connection of cast and forged parts various other metals. It’s not just round, ring-shaped connecting pieces such as pipes but also for pieces any geometry applicable.
  • connection element 2 has an angled contour in a fir tree shape 6 at its end facing the turbine housing 1.
  • the area of this contour 6 is a multiple of the area of a cast end portion with straight end faces. Such an angled shape is milled or turned into the steel casting, for example.
  • Figure 2 shows the connecting pipe 3 with the contour 6 in detail. It has several stages 7 and ends in a tip 8. Leakages of steam and gas are prevented on the long, angled surface of this fir tree shape. If there is a leak at one of the stages 7, a seal at one of the other stages 7 is possible. Forces are transferred well here without local tension. To optimize the casting around the fir tree shape, 1 radial holes 9 are made in the upper part of the contour 6, near the end of the casting, so that the molten metal can flow there from the inside to the outside of the connecting pipe and vice versa.
  • Example T-shapes and comb shapes are also available, such as Example T-shapes and comb shapes. All of these shapes can also be broken be carried out by drilling vertical or horizontal be attached. These are, for example, in the fir tree foot, the individual "branches" or webs of the fir tree shape or in the web of a T-shape. Similar to the radial holes, such bores have the advantage of a further enlarged surface and thus a strengthening of the connection as well also an easier flow of the casting material.
  • the invention is also applicable to the connection of other turbine parts such as Example for connecting entire turbine housings or housing sections, which special with regard to higher strength and / or temperature resistance Make demands.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

An end part of the second turbine part(3) facing the first turbine part is cast into the first turbine part(1). The end part the second turbine part has an angled contour (6), the surface of which is a multiple of the surface of a cast-in end part of th second turbine part without angled contour and with a flat surface. The angled contour in section has the shape of a fir tree, a comb or a T. The second turbine part has several radial holes, through which a metal smelt can flow in both directions.

Description

Technisches GebietTechnical field

Die Erfindung betrifft eine dampf- und gasdichte Verbindung von Turbinenteilen, wobei die Turbinenteile aus verschiedenartigen Metallen bestehen, die schwer miteinander verschweissbar sind. Es handelt sich insbesondere um eine dichte Verbindung eines Stahlteils mit einem Sphärogussteil.The invention relates to a vapor and gas-tight connection of turbine parts, the turbine parts are made of different types of metals that are heavy are weldable to each other. It is particularly a dense one Connection of a steel part with a nodular cast iron part.

Stand der TechnikState of the art

Für Grossgussteile von Turbinen wie zum Beispiel Gehäuseteile wird heute vermehrt Sphäroguss mit dem Ziel verwendet, die Giesskosten möglichst tief zu halten. Oft sollen diese Sphärogussteile mit Stahlteilen, wie Anschlussrohre, Ventilgehäuse und dergleichen, gas- und dampfdicht verbunden werden. Da diese Materialien schwer verschweissbar sind, werden solche Verbindungen zum Beispiel mittels Flanschen kraft- und formschlüssig realisiert. Die Flansche werden dabei entsprechend den Kräften, die auf die verbundenen Teile wirken, und den Ausdehnungsverhältnissen berechnet, sodass die Kraftübertragung und Dichtheit gewährleistet sind. Sie beinhalten jedoch relaxierende Verbindungselemente, sodass diese Verbindungen regelmässig auf ihre Dichtheit kontrolliert und gewartet werden müssen.
Verbindungen von Sphäroguss mit Stahl mittels Schweissen sind trotz des hohen Kohlenstoffgehalts im Sphäroguss möglich wie zum Beispiel durch Glühen oder Schmelzschweissen mit Hilfe von Zusatzmaterialien. Letzteres ist zum Beispiel aus US 4, 426, 426 und EP 0 261 570 bekannt. Beide Methoden, das Glühen sowie das Schmelzschweissen sind jedoch sehr arbeits- und kostenaufwendig.Ductile iron is increasingly used for large castings of turbines, such as housing parts, with the aim of keeping casting costs as low as possible. These nodular cast iron parts are often to be connected in a gas-tight and vapor-tight manner to steel parts such as connecting pipes, valve housings and the like. Since these materials are difficult to weld, such connections are realized, for example, by means of flanges in a non-positive and positive manner. The flanges are calculated according to the forces that act on the connected parts and the expansion ratios, so that power transmission and tightness are guaranteed. However, they contain relaxing connecting elements, so that these connections must be regularly checked for tightness and maintained.
Ductile iron can be connected to steel by means of welding despite the high carbon content in nodular iron, such as by annealing or fusion welding with the help of additional materials. The latter is known for example from US 4, 426, 426 and EP 0 261 570. However, both methods, annealing and fusion welding, are very labor intensive and costly.

Eine weitere bekannte Verbindungsmethode ist das Eingiessen von Stahlrohren in Sphärogussteile wie es in der EP 0 261 570 erwähnt ist. Mittels Unebenheiten im Stahlteil wird versucht eine metallurgische Verbindung zwischen den beiden Materialien herzustellen. Es entstehen jedoch aufgrund von spröden Randzonen am Stahlteil oft Risse, welche eine metallurgisch dichte Verbindung verunmöglichen.Another known connection method is the pouring of steel pipes into Ductile iron parts as mentioned in EP 0 261 570. Using bumps in the Steel part is trying a metallurgical connection between the two To manufacture materials. However, they arise due to brittle edge zones often cracks on the steel part, which are a metallurgically tight connection render impossible.

Darstellung der ErfindungPresentation of the invention

Es ist die Aufgabe der Erfindung, eine gas- und dampfdichte Verbindung zwischen schwer schweissbaren, metallischen Werkstoffen zu schaffen. Die Erfindung soll insbesondere relaxierende Verbindungselemente vermeiden und den Arbeits- und Kostenaufwand für deren Herstellung im Vergleich zum genannten Stand der Technik reduzieren.It is the object of the invention to provide a gas and vapor tight connection to create between difficult to weld, metallic materials. The In particular, the invention is intended to avoid relaxing connecting elements and the labor and cost of manufacturing them compared to reduce the prior art mentioned.

Die Aufgabe wird gemäss Anspruch 1 durch eine Verbindung zwischen einem ersten, gegossenen Turbinenteil und einem zweiten, metallenen Turbinenteil gelöst, wobei das zweite Turbinenteil eine höhere Schmelztemperatur als das gegossene Teil besitzt und eine Endpartie des zweiten Teils, die dem ersten Teil zugewandt ist, im zweiten Teil eingegossen ist.
Das zweite Turbinenteil weist insbesondere an der Endpartie, die im ersten Turbinenteil eingegossen ist, eine verwinkelte Kontur auf. Die Fläche dieser verwinkelten Kontur ist ein Mehrfaches von der Fläche einer Endpartie eines eingegossenen Turbinenteils, die keine verwinkelte Kontur und stattdessen ebene Flächen aufweist. The object is achieved according to claim 1 by a connection between a first, cast turbine part and a second, metallic turbine part, the second turbine part having a higher melting temperature than the cast part and an end part of the second part, which faces the first part, in second part is poured.
The second turbine part has an angled contour, in particular at the end part which is cast in the first turbine part. The area of this angled contour is a multiple of the area of an end part of a cast turbine part, which has no angled contour and instead has flat surfaces.

Durch das Eingiessen der verwinkelten Endpartie des zweiten Turbinenteils wird eine mechanische, kraft- und formschlüssige Verbindung realisiert. Durch die Verwinkelung besitzt die Endpartie eine stark vergrösserte Fläche, die an das gegossene Turbinenteil angrenzt. Die Fläche ist insbesondere ein Mehrfaches der Fläche einer Endpartie, die keine Kontur und nur ebene Flächen aufweist, wie es zum Beispiel beim Eingiessen eines geraden Rohrendes der Fall ist. Die Verwinkelung gewährleistet einerseits eine mechanische Verbindung durch Verankerung des zweiten Teils im ersten Teil. Anderseits wird aufgrund der stark vergrösserten Grenzfläche zwischen den beiden Teilen sowie auch der Verwinkelung eine Dichtung erwirkt.By pouring the angled end section of the second turbine part realized a mechanical, non-positive and positive connection. Through the The end section has a greatly enlarged surface that fits the cast turbine part adjoins. The area is in particular a multiple of that Surface of an end section that has no contour and only flat surfaces like it for example when pouring a straight pipe end. The Angling ensures a mechanical connection Anchoring the second part in the first part. On the other hand, due to the strong enlarged interface between the two parts as well as the Angling creates a seal.

In einer Ausführung der Erfindung ist beispielsweise das gegossene Turbinenteil ein Gehäuseteil und das zweite metallene Turbinenteil ein Anschlussrohr. Die Endpartie des Anschlussrohres, die im ersten, gegossenen Turbinenteil eingegossen ist, weist insbesondere im Schnitt eine Tannenbaumform auf mit mehreren Stufen oder "Ästen". Die Tannenbaumform zeichnet sich im Verhältnis zu seinem Volumen durch seine grosse Fläche aus, wobei diese starke Verwinkelungen bis 180° und mehr besitzt.
Das Gehäuseteil ist beispielsweise aus Sphäroguss, das zweite Turbinenteil aus geschmiedetem oder gegossenem Stahl, wobei die Tannenbaum-förmige Endpartie des zweiten Turbinenteils zum Beispiel durch Drehen oder Fräsen hergestellt ist. Das zweite Turbinenteil besitzt eine Schmelztemperatur, die höher ist als jene des Sphärogussteils, sodass es nicht zu einem vollständigen Aufschmelzen des Tannenbaums kommt. Zur Herstellung der Verbindung der beiden Teile, wird das zweite Turbinenteil in den Formkasten des Sphärogussteils eingebettet, wonach das erste Teil gegossen wird und die Tannenbaumform des zweiten Teils umschlossen wird.
Die eingegossene Tannenbaumform bewirkt eine starke mechanische, sowohl formschlüssige als auch kraftschlüssige Verbindung der beiden Teile sowie zugleich eine dichte Verbindung. Die Kraftübertragung sowie die Dichtung ist durch die mehreren Stufen oder "Äste" des Tannenbaums gewährleistet. In one embodiment of the invention, for example, the cast turbine part is a housing part and the second metal turbine part is a connecting pipe. The end part of the connecting pipe, which is cast in the first, cast turbine part, has, in particular, a fir tree shape with several steps or "branches". The fir tree shape is characterized in relation to its volume by its large area, which has strong angles up to 180 ° and more.
The housing part is made of, for example, nodular cast iron, the second turbine part is made of forged or cast steel, the fir tree-shaped end part of the second turbine part being produced, for example, by turning or milling. The second turbine part has a melting temperature that is higher than that of the nodular cast iron part, so that the fir tree does not completely melt. To establish the connection of the two parts, the second turbine part is embedded in the molding box of the spheroidal cast iron part, after which the first part is cast and the fir tree shape of the second part is enclosed.
The cast Christmas tree shape creates a strong mechanical, both positive and non-positive connection of the two parts and at the same time a tight connection. The power transmission and the seal is guaranteed by the several steps or "branches" of the fir tree.

Die starke Verwinkelung der Tannenbaumform bewirkt eine Unterbindung von Leckagen von Dampf und Gas, indem die mehreren Stufen der Tannenbaumform eine Mehrfachdichtung ermöglichen. Entsteht an der einen Stufe des Tannenbaums eine Leckage, ist eine Dichtung noch immer an einer der anderen Stufen möglich.
Die erfindungsgemässe Wirkung der mechanischen Verbindung und Dichtung ist dadurch bedingt, dass die Werkstoffe der beiden Teile in ihrem Ausdehnungsverhalten ähnlich sind, sodass bei Temperaturveränderungen keine Spalten zwischen den beiden Teilen und Undichtheiten entstehen.The strong angulation of the fir tree shape prevents leakage of steam and gas, as the multiple stages of the fir tree shape enable multiple seals. If there is a leak at one step of the fir tree, a seal can still be made at one of the other steps.
The effect of the mechanical connection and seal according to the invention is due to the fact that the materials of the two parts are similar in their expansion behavior, so that there are no gaps between the two parts and leaks when the temperature changes.

Die Tannenbaum-förmige Grenzfläche hat ferner den Vorteil, dass ein gutes Abgiessen möglich ist und dabei keine örtlichen Spannungen entstehen, die zu Rissen und Undichtheiten führen könnten.The fir tree-shaped interface also has the advantage of being a good one Pouring is possible and there are no local tensions Cracks and leaks.

Die Tannenbaumform erweist sich auch bezüglich Giessschrumpf als vorteilhaft. Diese Form besitzt an ihrer Oberfläche allgemein nur wenige Kerben, welche durch das teilweise Aufschmelzen ausgeglättet werden und so noch weiter vermindert werden. Dadurch entstehen im eingegossenen Bereich keine besonderen Spannungsüberhöhungen.The fir tree shape also proves to be advantageous with regard to casting shrinkage. This shape generally has only a few notches on its surface, which can be smoothed out by the partial melting and so on can be reduced. This does not result in any cast-in areas special voltage increases.

Die Erfindung ist bei der Verbindung von Sphäroguss und Stahl anwendbar, lässt sich aber auch zur Verbindung von gegossenen sowie geschmiedeten Teilen verschiedener weiterer Metalle verwenden. Sie ist weiter nicht nur bei runden, ringförmigen Verbindungsstücken wie Rohren sondern auch bei Stücken beliebiger Geometrie anwendbar. The invention is applicable to the connection of nodular cast iron and steel but also for the connection of cast and forged parts various other metals. It’s not just round, ring-shaped connecting pieces such as pipes but also for pieces any geometry applicable.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Es zeigen:

  • Figur 1 einen Schnitt durch einen Teil eines Dampfturbinengehäuses mit einem Anschlussrohr zu einem Ventilgehäuse,
  • Figur 2 eine Ansicht eines Schnittes des Anschlussrohres mit der erfindungsgemässen Endpartie.
    • Show it:
  • FIG. 1 shows a section through part of a steam turbine housing with a connecting pipe to a valve housing,
  • Figure 2 is a view of a section of the connecting pipe with the end portion according to the invention.

    • Weg der Ausführung der ErfindungWay of carrying out the invention

    Die erfindungsgemässe dichte Verbindung von zwei Turbinenteilen ist anhand dem in Figur 1 gezeigten Ausschnitt einer Turbine erläutert. Es ist ein Teil eines Gehäuses 1 einer Turbine mit einer Anschlusspartie 2. Das Turbinengehäuse besteht aus einem Sphäroguss, der nur schwer schweissbar ist. Das Turbinengehäuse 1 ist mittels einem Anschlusselement 3 mit einem Ventilgehäuse 4 verbunden, welche beide aus einem Stahlguss bestehen und an der Naht 5 miteinander verschweisst sind.
    Das Anschlusselement 2 weist gemäss der bevorzugten Ausführung der Erfindung an seinem dem Turbinengehäuse 1 zugewandten Ende eine verwinkelte Kontur in einer Tannenbaumform 6 auf. Die Fläche dieser Kontur 6 ist ein Mehrfaches der Fläche einer eingegossenen Endpartie mit geraden Endflächen.
    Eine solche verwinkelte Form wird beispielsweise in das Stahlgussteil gefräst oder gedreht.
    Bei der Herstellung der Verbindung wird die Endpartie des Anschlussrohres 2 mit der Kontur 6 in den Formkasten des Turbinengehäuseteils 1 eingebettet. Der Sphäroguss umschliesst beim Giessen dieses Teils die gesamte Kontur 6.    The tight connection according to the invention of two turbine parts is explained with reference to the section of a turbine shown in FIG. 1. It is part of a housing 1 of a turbine with a connection part 2. The turbine housing consists of a spheroidal graphite cast iron that is difficult to weld. The turbine housing 1 is connected to a valve housing 4 by means of a connection element 3, both of which consist of a cast steel and are welded to one another at the seam 5.
    According to the preferred embodiment of the invention, the connection element 2 has an angled contour in a fir tree shape 6 at its end facing the turbine housing 1. The area of this contour 6 is a multiple of the area of a cast end portion with straight end faces.
    Such an angled shape is milled or turned into the steel casting, for example.
    When establishing the connection, the end part of the connecting pipe 2 with the contour 6 is embedded in the molding box of the turbine housing part 1. The spheroidal cast iron encloses the entire contour 6 when this part is cast.

    Figur 2 zeigt das Anschlussrohr 3 mit der Kontur 6 im Detail. Sie weist mehrere Stufen 7 auf und endet in einer Spitze 8. An der langen, verwinkelten Fläche dieser Tannenbaumform werden Leckagen von Dampf und Gas unterbunden. Sollte eine Leckage an einer der Stufen 7 entstehen, ist eine Dichtung an einer der anderen Stufen 7 ermöglicht. Kräfte werden hier ohne örtliche Spannungen gut übertragen.
    Zur Optimierung des Abgiessens um die Tannenbaumform, sind im oberen Teil der Kontur 6, nahe dem Ende des Gussteils 1 Radiallöcher 9 angebracht, sodass die Metallschmelze dort von der Innen- zur Aussenseite des Anschlussrohres und umgekehrt fliessen kann.    Figure 2 shows the connecting pipe 3 with the contour 6 in detail. It has several stages 7 and ends in a tip 8. Leakages of steam and gas are prevented on the long, angled surface of this fir tree shape. If there is a leak at one of the stages 7, a seal at one of the other stages 7 is possible. Forces are transferred well here without local tension.
    To optimize the casting around the fir tree shape, 1 radial holes 9 are made in the upper part of the contour 6, near the end of the casting, so that the molten metal can flow there from the inside to the outside of the connecting pipe and vice versa.

    Ausser der Tannenbaumform sind auch weitere Formen ausführbar wie zum Beispiel T-Formen und Kammformen. Alle diese Formen können auch durchbrochen ausgeführt werden, indem senkrechte oder horizontale Bohrungen angebracht werden. Diese werden zum Beispiel im Tannenbaumfuss, den einzelnen "Ästen" oder Stegen der Tannenbaumform oder im Steg einer T-Form. Ähnlich den Radiallöchern erbringen solche Bohrungen den Vorteil einer weiter vergrösserten Oberfläche und somit einer Verfestigung der Verbindung sowie auch ein erleichtertes Fliessen des Gussmaterials.In addition to the fir tree shape, other shapes are also available, such as Example T-shapes and comb shapes. All of these shapes can also be broken be carried out by drilling vertical or horizontal be attached. These are, for example, in the fir tree foot, the individual "branches" or webs of the fir tree shape or in the web of a T-shape. Similar to the radial holes, such bores have the advantage of a further enlarged surface and thus a strengthening of the connection as well also an easier flow of the casting material.

    Die Erfindung ist auch zur Verbindung weiterer Turbinenteile anwendbar wie zum Beispiel zur Verbindung ganzer Turbinengehäuse oder Gehäusepartien, welche bezüglich höherer Festigkeit und/oder Temperaturbeständigkeit besondere Anforderungen stellen. The invention is also applicable to the connection of other turbine parts such as Example for connecting entire turbine housings or housing sections, which special with regard to higher strength and / or temperature resistance Make demands.

    BezugszeichenlisteReference list

    11
    TurbinengehäuseTurbine casing
    22nd
    Rohranschlusspartie des TurbinengehäusesPipe connection section of the turbine housing
    33rd
    Anschlusselement, AnschlussrohrConnection element, connection pipe
    44th
    VentilgehäuseValve body
    55
    SchweissnahtWeld
    66
    Endpartie des Anschlussrohres in Tannenbaumform, im ersten Turbinenteil eingegossenEnd section of the connecting pipe in the form of a fir tree, in the first turbine section poured
    77
    einzelne Stufen der Tannenbaumformindividual steps of the fir tree shape
    88th
    Spitze der TannenbaumformTop of the fir tree shape
    99
    RadiallöcherRadial holes

    Claims (5)

    Verbindung zwischen einem ersten gegossenen Turbinenteil (1) und einem zweiten metallenen Turbinenteil (3), dessen Schmelztemperatur höher ist als die des ersten gegossenen Turbinenteils (1), wobei eine Endpartie des zweiten Turbinenteils (3), die dem ersten Turbinenteil (1) zugewandt ist, im ersten Turbinenteil (1) eingegossen ist,
    dadurch gekennzeichnet, dass
    das zweite Turbinenteil (3) an seiner Endpartie, die im ersten Turbinenteil (1) eingegossen ist, eine verwinkelte Kontur (6) aufweist, deren Fläche ein Mehrfaches ist von der Fläche einer eingegossenen Endpartie eines zweiten Turbinenteils (3) ohne verwinkelte Kontur und mit ebenen Flächen.    Connection between a first cast turbine part (1) and a second metal turbine part (3), the melting temperature of which is higher than that of the first cast turbine part (1), an end part of the second turbine part (3) facing the first turbine part (1) is cast in the first turbine part (1),
    characterized in that
    the second turbine part (3) at its end part, which is cast in the first turbine part (1), has an angled contour (6), the area of which is a multiple of the area of a cast-in end part of a second turbine part (3) without an angled contour and with flat surfaces.         Verbindung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die verwinkelte Kontur (6) im Schnitt die Form eines Tannenbaums (6), eines Kammes oder eines T aufweist.    Compound according to claim 1,
    characterized in that
    the angled contour (6) has the shape of a fir tree (6), a comb or a T in section.         Verbindung nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, dass
    die Tannenbaumform, Kammform oder T-Form durch Bohrungen durchbrochen ist.     A compound according to claim 1 or 2,
    characterized in that
    the fir tree shape, comb shape or T shape is broken through holes.         Verbindung nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, dass
    das zweite Turbinenteil (3) mehrere Radiallöcher (9) aufweist, durch die eine Metallschmelze in beiden Richtungen fliessen kann.    Connection according to one of Claims 1 to 3,
    characterized in that
    the second turbine part (3) has a plurality of radial holes (9) through which a molten metal can flow in both directions.         Verbindung nach einem der Ansprüche 1 bis 4
    dadurch gekennzeichnet, dass
    das erste Turbinenteil (1) aus Sphäroguss und das zweite Turbinenteil (3) aus Stahl besteht.    Connection according to one of Claims 1 to 4
    characterized in that
    the first turbine part (1) consists of nodular cast iron and the second turbine part (3) consists of steel.
    EP99810387A 1999-05-05 1999-05-05 Gas tight connection between turbine elements Withdrawn EP1050357A1 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    EP99810387A EP1050357A1 (en) 1999-05-05 1999-05-05 Gas tight connection between turbine elements

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP99810387A EP1050357A1 (en) 1999-05-05 1999-05-05 Gas tight connection between turbine elements

    Publications (1)

    Publication Number Publication Date
    EP1050357A1 true EP1050357A1 (en) 2000-11-08

    Family

    ID=8242806

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99810387A Withdrawn EP1050357A1 (en) 1999-05-05 1999-05-05 Gas tight connection between turbine elements

    Country Status (1)

    Country Link
    EP (1) EP1050357A1 (en)

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10355898B3 (en) * 2003-11-29 2005-06-02 Daimlerchrysler Ag Connection for joining vehicle chassis parts comprises a support part having an opening in a first material plane which is displaced opposite a second material plane
    EP2368653A2 (en) 2010-03-12 2011-09-28 REpower Systems AG Method for manufacturing a machine supporting base for a wind turbine, supporting base and wind turbine
    DE102017106457B4 (en) 2016-05-17 2019-02-21 Suzuki Motor Corporation inserter

    Citations (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CH480445A (en) * 1967-12-12 1969-10-31 Bbc Brown Boveri & Cie Process for encapsulating machine parts made of steel with cast iron
    GB1487156A (en) * 1974-08-05 1977-09-28 Trw Inc Bi-metallic casting
    US4426426A (en) 1982-07-22 1984-01-17 Muehlberger Horst Welding alloy and method
    US4494287A (en) * 1983-02-14 1985-01-22 Williams International Corporation Method of manufacturing a turbine rotor
    US4573876A (en) * 1983-02-14 1986-03-04 Williams International Corporation Integral bladed disk
    EP0261570A1 (en) 1986-09-24 1988-03-30 BBC Brown Boveri AG Method for welding nodular iron to steel
    DE19548175A1 (en) * 1995-12-22 1997-06-26 Audi Ag Fixing method for turbine housing

    Patent Citations (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CH480445A (en) * 1967-12-12 1969-10-31 Bbc Brown Boveri & Cie Process for encapsulating machine parts made of steel with cast iron
    GB1487156A (en) * 1974-08-05 1977-09-28 Trw Inc Bi-metallic casting
    US4426426A (en) 1982-07-22 1984-01-17 Muehlberger Horst Welding alloy and method
    US4494287A (en) * 1983-02-14 1985-01-22 Williams International Corporation Method of manufacturing a turbine rotor
    US4573876A (en) * 1983-02-14 1986-03-04 Williams International Corporation Integral bladed disk
    EP0261570A1 (en) 1986-09-24 1988-03-30 BBC Brown Boveri AG Method for welding nodular iron to steel
    DE19548175A1 (en) * 1995-12-22 1997-06-26 Audi Ag Fixing method for turbine housing

    Cited By (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10355898B3 (en) * 2003-11-29 2005-06-02 Daimlerchrysler Ag Connection for joining vehicle chassis parts comprises a support part having an opening in a first material plane which is displaced opposite a second material plane
    EP2368653A2 (en) 2010-03-12 2011-09-28 REpower Systems AG Method for manufacturing a machine supporting base for a wind turbine, supporting base and wind turbine
    EP2368653A3 (en) * 2010-03-12 2013-02-20 REpower Systems AG Method for manufacturing a machine supporting base for a wind turbine, supporting base and wind turbine
    DE102017106457B4 (en) 2016-05-17 2019-02-21 Suzuki Motor Corporation inserter

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