EP0331026B1 - Procédé et dispositif pour la production d'un bloc pour échangeur de chaleur - Google Patents

Procédé et dispositif pour la production d'un bloc pour échangeur de chaleur Download PDF

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Publication number
EP0331026B1
EP0331026B1 EP89103242A EP89103242A EP0331026B1 EP 0331026 B1 EP0331026 B1 EP 0331026B1 EP 89103242 A EP89103242 A EP 89103242A EP 89103242 A EP89103242 A EP 89103242A EP 0331026 B1 EP0331026 B1 EP 0331026B1
Authority
EP
European Patent Office
Prior art keywords
outer shell
tubes
tube
heat exchanger
cylindrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89103242A
Other languages
German (de)
English (en)
Other versions
EP0331026A2 (fr
EP0331026A3 (en
Inventor
Karl Maier
Horst Stirnweis
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.)
MTU Aero Engines GmbH
Original Assignee
MTU Motoren und Turbinen Union Muenchen GmbH
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 MTU Motoren und Turbinen Union Muenchen GmbH filed Critical MTU Motoren und Turbinen Union Muenchen GmbH
Publication of EP0331026A2 publication Critical patent/EP0331026A2/fr
Publication of EP0331026A3 publication Critical patent/EP0331026A3/de
Application granted granted Critical
Publication of EP0331026B1 publication Critical patent/EP0331026B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • B22D19/0063—Casting in, on, or around objects which form part of the product finned exchangers
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/162—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using bonding or sealing substances, e.g. adhesives

Definitions

  • the invention relates to a method according to the preamble of claim 1 and to devices for carrying out the method according to the preambles of claims 7 and 8.
  • Heat exchanger blocks of the type mentioned are known in profile tube heat exchangers according to DE-PS 3146090.
  • Such known profile tube heat exchangers essentially have two header tubes arranged approximately parallel to one another for guiding the compressed air.
  • a profile tube matrix running in a U-bend is to be connected to the collecting tubes on the inlet side or outlet side. Hot gas flows through the profile tube matrix in order to heat up the compressed air supplied via a collecting tube, the heated compressed air then via the adjacent further collecting tube to a suitable consumer, for.
  • the combustion chamber of a gas turbine engine can be supplied.
  • soldering represents a risk factor that has not been dealt with in practice to date in that comparatively large soldering gaps or joints must be assumed in order to be able to guarantee a perfect transport of the molten solder supplied. There is a risk that the molten solder will shift to different zones, so that during the final cooling process there is no guarantee that the solder joints in question will be completely filled with solder over their entire circumference. This has an adverse effect on the required tightness and strength of the connections. A relatively large soldering thickness in turn has an adverse effect on the corrosion behavior of the connection. In addition, even with connection versions already welded with electron beams, a comparatively low strength can be expected as a result of notch effects at the relevant connection points of the header pipe.
  • a tube plate or header tube is to be assembled from a large number of precisely pre-shaped or pre-profiled elements;
  • the layer in question should be joined together on layer Elements should therefore be preformed in such a way that they can enclose half of the arranged profile tube ends of the matrix in a form-fitting manner.
  • the profile tubes are to be inserted into predetermined openings in a hollow mold which form a wall section of the collecting tube with sintered powder, in which the profile tube ends are firmly and gas-tightly integrated should.
  • a major disadvantage of this known solution is that due to the hollow shape, only a boundary surface of the wall section to be formed is set.
  • the wall thickness is thus predetermined by the amount of powder bulk, a difficulty being seen in keeping the wall thickness tolerances low. This is particularly difficult due to the spatially relatively narrow arrangement of a large number of profile tubes.
  • a known case on which the preamble of patent claim 1 is based (DE-PS 521 654) deals with a connection which is to be produced simultaneously when casting collecting chambers and with the respective outer end sections of connecting pipes of a radiator which are to be particularly widened here.
  • the known case requires a special frame, which receives a core and a shape, for local positioning of the connecting pipes.
  • the invention is based on the object of specifying such a method and devices for carrying it out that, in the case of a comparatively simple manifold section or pipe to be produced in a predetermined wall thickness, the ends of the profiled pipes are simultaneously poured into the manifold material with a relatively low outlay and with exactly the desired spacing density can be.
  • the invention makes it possible to produce a manifold wall in the required wall thickness practically "in one casting", in particular by means of an investment casting process, and at the same time cast the profiled pipe ends firmly and reliably in the required mutual spacing into the wall to be created.
  • z. B purely cylindrical manifolds or sections of the same, either individually or in multiple numbers, manufactured substantially simultaneously and connected in one or more arrangements to the relevant tube ends.
  • an outer shell configuration (outer perforated plates) which does not have to be destroyed in a cumbersome manner after the relevant collecting pipes or pipe sections have been cast; the perforated sheet in question (original molded body) should therefore be melted on the surface side with the relevant manifold material during the casting process.
  • the collecting tube created by casting in particular investment casting, is not exposed to any damage, as can generally not be ruled out as a result of local destruction of a respective outer molded shell (material caking).
  • an additional outer shell treatment or mechanical post-contouring is omitted, in particular in the area of the relevant profile tube connection parts.
  • the perforated plate configuration according to the invention ensures that one of the required spatial profile spacing in accordance with reliable profile tube connection is initiated from the beginning, that is to say prior to the casting with the profile tube ends.
  • this is additionally supported as a result of the core-side grid-like centering seat surfaces, which form a longitudinal stop of the respective profile tube ends.
  • the profile tube heat exchanger essentially consists of two manifolds 1, 2 arranged parallel to one another. From these two manifolds 1, 2, a profile tube matrix 3 bent over in a U-shape protrudes against a hot gas flow G.
  • the profile tube matrix consists of individual profile tubes with an elliptical cross section, as can be seen in FIG. 1, at the bottom left in section, without further notice. It can also be seen from the sectional view that the hot gas flow G mentioned winds essentially in a serpentine manner through the predetermined hot gas flow cross sections of the matrix.
  • the individual profile tubes 4 are thus arranged in an upright manner with respect to the hot gas flow G in question.
  • compressed air D is supplied to the upper collecting pipe 1, which then flows laterally into the initially straight-leg sections of the matrix 3; in the outer region of the matrix, the compressed air flow is then deflected and passes through the relevant lower straight-leg portions of the matrix 3 into the lower header pipe 2, from which it is suitable in the heated state according to arrow D ' Consumers, e.g. B. the combustion chamber of a gas turbine engine can be supplied.
  • Suitable spacers of the profile tubes 4 are shown by way of example with 5 and 6 in FIG. 1.
  • At least a section of one of the aforementioned collecting pipes 1, 2 is to be produced and can be connected to profile pipes 4 of the heat exchanger matrix 3 in a fixed and fluid-tight manner.
  • the relevant section of the collecting pipe 1, 2 is to be produced by casting, preferably by means of an investment casting process, the ends of the assigned and finished profile pipes 4 being to be simultaneously integrated into the molten casting material by means of this casting process; the ends of the profiled tubes 4 should preferably be integrally connected to the relevant header tube material by local surface melting occurring during casting.
  • the outer shell can be at least in the respective matrix connection or connection area as a relatively thin, for.
  • FIG. 2 there is the possibility of forming and assembling the outer shell in several parts.
  • Fig. 2 thus includes a double cylindrical confirguration, in which the outer shell in the combination of arranged in the respective matrix connection areas perforated plates 15, 15 'and outer, optionally ceramic molded bodies 16, 16', 17, of which one, 17, is also central Link between the cylindrical sections of the 8-shaped or double-cylindrical outer shell 15, 15 ', 16, 16', 17.
  • the above-mentioned multi-part design and composition of the outer shell is of course not tied to an embodiment according to FIG. 2, which is double-cylindrical or 8-shaped in the aforementioned sense. In other words, that means it can be purely z.
  • an additional ceramic layer 13 can be applied to prevent the molten cast material from flowing out.
  • the relevant cavities 9,9 ' are formed between correspondingly rounded surfaces of the ceramic shaped bodies 16,17,16' on one side and associated outer surfaces of the cores 7,7 'on the other side.
  • the perforated plates acting as outer shell means 15,15 ' also have openings 9,9' opening into the cavities 9,9, which are provided for prepositioning and holding the ends of the profiled tubes 4 to be connected to the header tube section or tube to be produced later.
  • the outer surface of the respective central core 7, 7 'can preferably have grid-like centering seat surfaces 12, 12' for the ends of the profile tubes 4 which are pre-positioned and held on the shell.
  • the through openings in the perforated plates 15, 15 'can form a suitable and sufficiently dimensioned play seat for threading the tube.
  • the outer shell means formed as perforated plates 15, 15 ′, in particular along the outer circumferential region containing the respective through openings, can be lined with a covering skin or additional shell instead of the aforementioned pointed layer 13;
  • the spray layer 13 can be made of a suitable ceramic material.
  • the spray layer 13 mentioned, but also the alternatives (Cover skin, additional shell) are intended to prevent parts of the molten cast material from flowing off in regions outside the shell in question.
  • highly heat-resistant nickel-chromium-containing alloys can be used as materials for the collecting tubes 1, 2 and the profile tubes 4.
  • the melting point of the material for the header pipes 1, 2 should be approximately 50 ° C. lower than that of the material for the profile pipes 4.
  • the mentioned central cores 7,7 ' can optionally be made divisible so that they can be reused. They can preferably be made from a suitable ceramic material such as aluminum oxide, silicon carbide or silicon nitride.
  • the perforated sheet-like outer shells from an injection-moldable metallic or from a metal-ceramic material.
  • the invention also includes the possibility of forming two cavities 9.9 'which receive the cast material and form the later manifolds 1, 2' between cylindrical cores 7, 7 'arranged approximately parallel next to one another and an 8-shaped outer shell placed here, for example, over the latter.
  • both manifolds 1, 2 can be cast simultaneously, and at the same time the relevant profile tube ends of the matrix can also be cast firmly and reliably into the cast material of the manifolds 1, 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (8)

1. Procédé de fabrication d'un bloc échangeur de chaleur selon lequel au moins un segment d'un tube collecteur (1) est fabriqué tout en étant simultanément relié de manière solide et étanche au fluide aux extrémités de tubes profilés (4), positionnés préalablement et appartenant à une matrice d'échangeur de chaleur (3), par coulée d'une matière métallique fondue dans la cavité (9) formée entre un noyau central (7′) et une coquille extérieure, procédé caractérisé en ce que :
- comme coquille extérieure on utilise une tôle perforée (15) par laquelle on prépositionne et on centre les extrémités des tubes profilés (4) pénétrant dans la cavité (9),
- la tôle perforée (15) fond en surface dans le matériau du tube collecteur au cours de la phase de coulée.
2. Procédé selon la revendication 1, caractérisé en ce que la surface extérieure du noyau central (7, 7′) est muni de surfaces de siège de centrage (12, 12′) en forme de trame pour les extrémités des tubes profilés.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la coquille extérieure est revêtue le long de la zone périphérique extérieure munie des perforations, d'une peau de revêtement, d'une coquille complémentaire ou d'une couche pulvérisée (13), notamment en matière céramique.
4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le noyau central (7), la coquille extérieure et la cavité (9) sont cylindriques.
5. Procédé selon une ou plusieurs des revendications 1 à 4, caractérisé en ce que le noyau central (7) est fabriqué en une matière céramique telle que de l'oxyde d'aluminium, du carbure de silicium ou du nitrure de silicium.
6. Procédé selon une ou plusieurs des revendications 2 à 5, caractérisé en ce que la coquille extérieure est réalisée en une matière métallique susceptible d'être pulvérisée ou d'une matière céramique-métallique.
7. Dispositif pour la mise en oeuvre du procédé selon les revendications 1 à 6 pour un bloc échangeur de chaleur à deux tubes collecteurs (1, 2) juxtaposés parallèlement, et auxquels sont à relier les extrémités d'entrée et de sortie des tubes profilés (4) d'une matrice croisée à contre-courants (3), dispositif caractérisé en ce que la coquille extérieure est composée de la combinaison formée des tôles perforées (15, 15′) dans les zones de liaison respectives de la matrice et par des corps de moule (16, 16′, 17) extérieurs, le cas échéant en matière céramique, corps dont l'un (17) est un organe de liaison central entre les sections cylindriques d'une coquille extérieure en forme de 8 ou de double cylindre, composée de tôles perforées (15, 15′) et de corps de forme (16, 16′, 17) pour les deux tubes collecteurs (1, 2).
8. Dispositif pour la mise en oeuvre du procédé selon les revendications 1 à 6 pour un bloc échangeur de chaleur à deux tubes collecteurs (1, 2) juxtaposés sensiblement parallèlement, et des extrémités des tubes profilés (4) d'une matrice croisée à contre-courants (3), extrémités qui doivent être reliées par leur entrée et leur sortie au tube collecteur, dispositif caractérisé en qu'on forme deux cavités (9, 9′) recevant la matière coulée pour les tubes collecteurs (1, 2) entre des noyaux intérieurs (7, 7′) cylindriques, sensiblement parallèles, juxtaposés, et d'une coquille extérieure en forme de tôle perforée, en double cylindre ou en forme de 8 rabattue sur les noyaux intérieurs.
EP89103242A 1988-03-04 1989-02-24 Procédé et dispositif pour la production d'un bloc pour échangeur de chaleur Expired - Lifetime EP0331026B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3807055 1988-03-04
DE3807055A DE3807055A1 (de) 1988-03-04 1988-03-04 Verfahren zur herstellung eines waermetauscherblockes sowie vorrichtung zur durchfuehrung des verfahrens

Publications (3)

Publication Number Publication Date
EP0331026A2 EP0331026A2 (fr) 1989-09-06
EP0331026A3 EP0331026A3 (en) 1989-10-25
EP0331026B1 true EP0331026B1 (fr) 1992-05-20

Family

ID=6348836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89103242A Expired - Lifetime EP0331026B1 (fr) 1988-03-04 1989-02-24 Procédé et dispositif pour la production d'un bloc pour échangeur de chaleur

Country Status (3)

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EP (1) EP0331026B1 (fr)
JP (1) JPH01317676A (fr)
DE (2) DE3807055A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4139104C1 (fr) * 1991-11-28 1993-05-27 Mtu Muenchen Gmbh
DE4226207C1 (de) * 1992-08-07 1993-09-30 Siemens Nixdorf Inf Syst Positioniervorrichtung für Gußteile mit eingegossenen Rohrmäandern
DE10260535A1 (de) * 2002-12-21 2004-07-08 Mtu Aero Engines Gmbh Verfahren zur Herstellung von aus Halbrohren oder Rohren bestehenden Wärmetauscherrohren für Rekuperativ-Abgaswärmetauscher
DE102004027109A1 (de) * 2004-06-03 2005-12-29 Siempelkamp Giesserei Gmbh Verfahren zur Herstellung eines eine Gravur aufweisenden, temperierbaren Werkzeugs im Wege des Gießens
US9816767B2 (en) * 2016-01-12 2017-11-14 Hamilton Sundstrand Corporation Tubes and manifolds for heat exchangers

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE203723C (fr) *
DE157134C (fr) *
DE166455C (fr) *
DE521654C (de) * 1929-08-08 1931-03-24 Aurelio Possenti Verfahren zur Herstellung von Radiatoren, deren Rohrelemente mit ihren Enden in den Sammelkammern eingegossen sind
DE2343310A1 (de) * 1973-08-28 1975-03-06 Daimler Benz Ag Kreuzstrom-roehrenwaermetauscher fuer gase
GB2014069A (en) * 1978-02-08 1979-08-22 Foerenade Fabriksverken Method for the manufacture of a bundle of tubes held in spaced apart relationship by one or more holders
DE3146090C2 (de) * 1981-11-20 1986-10-02 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Wärmetauscher für Gase stark unterschiedlicher Temperaturen
DE3324915C2 (de) * 1982-08-14 1985-04-18 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Verfahren zur Herstellung eines Wärmetauscherblocks
DE3310061A1 (de) * 1982-11-19 1984-05-24 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Verfahren zur herstellung einer rohrverteileranordnung sowie ein nach diesem verfahren gefertigter waermetauscher-sammelbehaelter

Also Published As

Publication number Publication date
JPH01317676A (ja) 1989-12-22
EP0331026A2 (fr) 1989-09-06
EP0331026A3 (en) 1989-10-25
DE3807055A1 (de) 1989-09-14
DE3807055C2 (fr) 1990-01-18
DE58901445D1 (de) 1992-06-25

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