EP1050357A1 - Connexion étanche entre des éléments de turbine - Google Patents
Connexion étanche entre des éléments de turbine Download PDFInfo
- 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
- Authority
- 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.)
- Withdrawn
Links
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims 2
- 238000005266 casting Methods 0.000 abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000002040 relaxant effect Effects 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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
- 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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99810387A EP1050357A1 (fr) | 1999-05-05 | 1999-05-05 | Connexion étanche entre des éléments de turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99810387A EP1050357A1 (fr) | 1999-05-05 | 1999-05-05 | Connexion étanche entre des éléments de turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1050357A1 true EP1050357A1 (fr) | 2000-11-08 |
Family
ID=8242806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99810387A Withdrawn EP1050357A1 (fr) | 1999-05-05 | 1999-05-05 | Connexion étanche entre des éléments de turbine |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP1050357A1 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10355898B3 (de) * | 2003-11-29 | 2005-06-02 | Daimlerchrysler Ag | Verbindung von und aus wenigstens zwei Bauteilen |
| EP2368653A2 (fr) | 2010-03-12 | 2011-09-28 | REpower Systems AG | Procédé de fabrication d'un support de machine pour une éolienne, support de machine et éolienne |
| DE102017106457B4 (de) | 2016-05-17 | 2019-02-21 | Suzuki Motor Corporation | Einsetzelement |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH480445A (de) * | 1967-12-12 | 1969-10-31 | Bbc Brown Boveri & Cie | Verfahren zum Umgiessen von Maschinenteilen aus Stahl mit Gusseisen |
| 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 (fr) | 1986-09-24 | 1988-03-30 | BBC Brown Boveri AG | Procédé de soudage de la fonte nodulaire à l'acier |
| DE19548175A1 (de) * | 1995-12-22 | 1997-06-26 | Audi Ag | Befestigung eines Turbinengehäuses |
-
1999
- 1999-05-05 EP EP99810387A patent/EP1050357A1/fr not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH480445A (de) * | 1967-12-12 | 1969-10-31 | Bbc Brown Boveri & Cie | Verfahren zum Umgiessen von Maschinenteilen aus Stahl mit Gusseisen |
| 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 (fr) | 1986-09-24 | 1988-03-30 | BBC Brown Boveri AG | Procédé de soudage de la fonte nodulaire à l'acier |
| DE19548175A1 (de) * | 1995-12-22 | 1997-06-26 | Audi Ag | Befestigung eines Turbinengehäuses |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10355898B3 (de) * | 2003-11-29 | 2005-06-02 | Daimlerchrysler Ag | Verbindung von und aus wenigstens zwei Bauteilen |
| EP2368653A2 (fr) | 2010-03-12 | 2011-09-28 | REpower Systems AG | Procédé de fabrication d'un support de machine pour une éolienne, support de machine et éolienne |
| EP2368653A3 (fr) * | 2010-03-12 | 2013-02-20 | REpower Systems AG | Procédé de fabrication d'un support de machine pour une éolienne, support de machine et éolienne |
| DE102017106457B4 (de) | 2016-05-17 | 2019-02-21 | Suzuki Motor Corporation | Einsetzelement |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 18D | Application deemed to be withdrawn |
Effective date: 20010509 |