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EP0458045A1 - Metal carrier matrix for a catalytic reactor - Google Patents

Metal carrier matrix for a catalytic reactor Download PDF

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Publication number
EP0458045A1
EP0458045A1 EP91105500A EP91105500A EP0458045A1 EP 0458045 A1 EP0458045 A1 EP 0458045A1 EP 91105500 A EP91105500 A EP 91105500A EP 91105500 A EP91105500 A EP 91105500A EP 0458045 A1 EP0458045 A1 EP 0458045A1
Authority
EP
European Patent Office
Prior art keywords
metal support
support matrix
stacks
shape
point
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.)
Granted
Application number
EP91105500A
Other languages
German (de)
French (fr)
Other versions
EP0458045B1 (en
Inventor
Bohumil Humpolik
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.)
Vitesco Technologies Lohmar Verwaltungs GmbH
Original Assignee
Emitec Gesellschaft fuer Emissionstechnologie mbH
Behr GmbH and Co KG
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Publication date
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Publication of EP0458045A1 publication Critical patent/EP0458045A1/en
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Publication of EP0458045B1 publication Critical patent/EP0458045B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • F01N2330/04—Methods of manufacturing
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/1234—Honeycomb, or with grain orientation or elongated elements in defined angular relationship in respective components [e.g., parallel, inter- secting, etc.]

Definitions

  • the invention relates to a metal support matrix for a catalytic reactor for exhaust gas purification, in particular for internal combustion engines, according to the preamble of patent claim 1.
  • the aforementioned method has the disadvantage that special shapes are produced by inserting loose filler pieces Need to become. It is also disadvantageous that devouring thicker stacks of sheet metal, which are required to produce larger catalyst diameters, requires extraordinarily high forces.
  • the invention is therefore based on the object of designing a metal support matrix of the type mentioned at the outset in such a way that a homogeneous, easy-to-manufacture honeycomb body is formed from a multiplicity of sheet metal layers and, if possible, each sheet metal layer comes into contact with the enveloping jacket.
  • the proposed configuration allows the simple production of a metal support matrix from a large number of sheet metal layers.
  • the adaptation to different forms of the jacket is easily possible.
  • a variety of shapes can be created by varying the length and / or the thickness of the individual stacks will.
  • special shapes for example of elliptical support matrices, it is not necessary to insert filler pieces, as a result of which a substantial reduction in production costs is achieved.
  • Catalyst forms with larger diameters can advantageously be designed in that the metal support matrix consists of a larger number of stacks. This reduces the thickness of the individual stacks, the individual sheet layers are evenly distributed in the metal support matrix, and the forces required for the stacks to be devoured are reduced.
  • the configuration of the metal support matrix from four stacks is also particularly advantageous, since this configuration results in a very uniform distribution of the lines of contact of the sheet metal layers with the jacket on the inner jacket surface.
  • the embodiment according to claim 6 enables the advantageous embodiment of an elliptical or ellipse-like catalyst shape.
  • the even distribution of the lines of contact on the inner circumferential surface in elliptical or ellipse-like catalyst forms can be expediently obtained by pressing a round metal support matrix, which has a larger cavity inside, into the desired elliptical or ellipse-like shape.
  • the shape of the stack from which the metal carrier matrix is made always has two parallel edges in the side view.
  • the ends of the stack can end at different angles, so that the geometric shapes described in the characterizing part of claim 1 result.
  • FIG. 1a A circular catalyst shape is shown in FIG. 1a and the associated arrangement of the stacks (3) is shown schematically in FIG. 1b.
  • the dimensions of the stacks (3) are identical. They have a rectangular shape, in the illustration shown here corrugated (4) and smooth (5) sheet metal layers are layered on top of one another.
  • the stacks (3) are arranged such that the lines of contact in the side view give the shape of a right-angled cross (6), which is shown in the drawing by thick lines.
  • the stacks (3) are wrapped clockwise around a point of symmetry (8), which is the center of the cross (6) here.
  • the metal carrier matrix (1) thus produced is then inserted into a jacket (2).
  • the sheet metal layers (4, 5) of the metal carrier matrix (1) and the jacket (2) are connected in the next production step by a joining technique, preferably by soldering.
  • FIG. 2 shows a square catalyst shape (with rounded corners).
  • the arrangement of the stacks (3) is cruciform, as in the round catalyst shape.
  • the individual stacks (3) are not rectangular in the side view, but tapering at the outer end, ie trapezoidal. The manufacturing process proceeds as indicated in the description of FIG. 1.
  • FIG. 3a An elongated catalyst shape is shown in FIG. 3a and the associated arrangement of the stacks (3) is shown schematically in FIG. 3b.
  • the arrangement of the stacks (3) is also cruciform.
  • the stacks (3) above and below a displacement plane E-E which is perpendicular to the plane of the drawing, are displaced relative to each other, so that a displaced cross (7) results, which is shown in the drawing by thick lines.
  • the distance between the stacks (3) which are perpendicular to the displacement plane E-E determines the width of the catalyst.
  • the stacks (3) as already shown in the description of FIG. 1, are wrapped clockwise around the point of symmetry (8), which is arranged on the displacement plane E-E and centrally to both displaced stacks (3). The further manufacturing steps take place as already stated above.
  • FIGS. 4b and 5b schematically illustrate elliptical catalyst shapes and in FIGS. 4b and 5b the associated arrangements of the stacks (3).
  • the arrangement of the stacks (3) is similar to the arrangement shown in Fig. 3b.
  • the stacks (3) shown here vary in thickness and length. This results in further different forms for the catalyst. The manufacturing process proceeds as explained in the description of FIG. 1.
  • FIG. 6a shows a further embodiment of an elliptical catalytic converter shape
  • FIG. 6b shows the associated arrangement of the stacks before devouring
  • FIG. 6c shows the associated arrangement of the stacks after devouring.
  • the stacks (3) are in the side view parallelogram. They are arranged in a cross shape around the point of symmetry (8) that a central square cavity (9) is formed.
  • the stacks (3) are devoured clockwise around the cavity (9) or the point of symmetry (8), which forms the center of the cavity (9).
  • a round shape of the metal carrier matrix (1) results, which is shown schematically in FIG. 6c. Starting from this round shape, the metal support matrix (1) is pressed into the desired elliptical shape using suitable tools.
  • the central cavity (9) is closed.
  • the metal carrier matrix (1) is inserted into a jacket (2) and connected to it by joining technology.
  • a round catalyst shape is shown, which consists of eight stacks (3).
  • Fig. 7b shows the symmetrical arrangement of the eight parallelogram stacks (3) around the point of symmetry (8) before devouring.
  • the stacks (3) are the same in thickness and length. Their end faces are brought into contact with the side surfaces of the adjacent stack (3), the free ends of the stack (3) are intertwined in the same direction around the point of symmetry (8).
  • the metal carrier matrix (1) thus produced is inserted into the jacket (2) and connected to it by joining technology.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

This metal carrier consists of a plurality of stacks, preferably of four stacks. The stacks are here arranged symmetrically around one point. The free ends of the stacks are intertwined around the point of symmetry. Different catalyst shapes or catalyst diameters can very easily be accommodated by deliberate sizing of the individual stacks. <IMAGE>

Description

Die Erfindung betrifft eine Metallträgermatrix für einen katalytischen Reaktor zur Abgasreinigung, insbesondere für Brennkraftmaschinen, nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a metal support matrix for a catalytic reactor for exhaust gas purification, in particular for internal combustion engines, according to the preamble of patent claim 1.

Es ist bekannt (EP-A1 245 737) eine Metallträgermatrix für einen katalytischen Reaktor dadurch herzustellen, daß mehrere glatte und gewellte Metallbänder abwechselnd zu einem Stapel aufeinander geschichtet und daß die Enden dieses Stapels um zwei Fixpunkte verschlungen werden. Diese Metallträgermatrix wird in einen rohrförmigen Mantel eingesetzt und mit diesem fügetechnisch verbunden.It is known (EP-A1 245 737) to produce a metal support matrix for a catalytic reactor in that several smooth and corrugated metal strips are stacked alternately in a stack and that the ends of this stack are devoured by two fixed points. This metal support matrix is inserted into a tubular jacket and connected to it by joining technology.

Die vorgenannte Methode weist den Nachteil auf, daß Sonderformen durch das Einlegen loser Füllstücke hergestellt werden müssen. Nachteilig ist außerdem, daß ein Verschlingen dickerer Blechstapel, die zur Herstellung größerer Katalysatordurchmesser erforderlich sind, ausserordentlich hohe Kräfte erfordert.The aforementioned method has the disadvantage that special shapes are produced by inserting loose filler pieces Need to become. It is also disadvantageous that devouring thicker stacks of sheet metal, which are required to produce larger catalyst diameters, requires extraordinarily high forces.

Es ist auch bekannt (DE-U1 89 08 671), Metallträgermatrizen aus mehr als zwei Stapeln herzustellen, wobei die einzelnen Stapel um eine Knicklinie gefaltet und anschließend gemeinsam verschlungen werden. Nachteilig ist hierbei, daß jeder einzelne Stapel in einem zusätzlichen Arbeitsgang gefaltet werden muß. Außerdem verbleiben bei dieser Art der Herstellung einer Metallträgermatrix im Inneren der Trägermatrix größere Bereiche, die nicht durch den Wabenkörper ausgefüllt werden, insbesondere im Zentrum der Trägermatrix.It is also known (DE-U1 89 08 671) to produce metal carrier matrices from more than two stacks, the individual stacks being folded around a folding line and then being devoured together. The disadvantage here is that each individual stack must be folded in an additional operation. In addition, with this type of production of a metal carrier matrix, larger areas remain inside the carrier matrix that are not filled by the honeycomb body, in particular in the center of the carrier matrix.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Metallträgermatrix der eingangs genannten Art so auszubilden, daß ein homogener, einfach zu fertigender Wabenkörper aus einer Vielzahl von Blechlagen entsteht und möglichst jede Blechlage mit dem umhüllenden Mantel in Berührung kommt.The invention is therefore based on the object of designing a metal support matrix of the type mentioned at the outset in such a way that a homogeneous, easy-to-manufacture honeycomb body is formed from a multiplicity of sheet metal layers and, if possible, each sheet metal layer comes into contact with the enveloping jacket.

Zur Lösung der Aufgabe wird ein Wabenkörper mit den kennzeichnenden Merkmalen des Anspruchs 1 vorgeschlagen. Weitere vorteilhafte Ausgestaltungen einer solchen Metallträgermatrix sind in den Unteransprüchen 2 bis 8 aufgezeigt.To achieve the object, a honeycomb body with the characterizing features of claim 1 is proposed. Further advantageous configurations of such a metal carrier matrix are shown in subclaims 2 to 8.

Die vorgeschlagene Ausgestaltung erlaubt die einfache Herstellung einer Metallträgermatrix aus einer Vielzahl von Blechlagen. Insbesondere die Anpassung an unterschiedliche Formen des Mantels ist leicht möglich. Durch eine Variierung der Länge und/oder der Dicke der einzelnen Stapel kann eine Vielzahl von Formen erzeugt werden. So ist zur Herstellung von Sonderformen, z.B. von elliptischen Trägermatrizen, ein Einlegen von Füllstücken nicht erforderlich, wodurch eine wesentliche Verminderung der Produktionskosten erreicht wird.The proposed configuration allows the simple production of a metal support matrix from a large number of sheet metal layers. In particular, the adaptation to different forms of the jacket is easily possible. A variety of shapes can be created by varying the length and / or the thickness of the individual stacks will. For the production of special shapes, for example of elliptical support matrices, it is not necessary to insert filler pieces, as a result of which a substantial reduction in production costs is achieved.

Katalysatorformen mit größeren Durchmessern sind vorteilhaft dadurch zu gestalten, daß die Metallträgermatrix aus einer größeren Anzahl von Stapeln besteht. Dadurch wird die Dicke der einzelnen Stapel verringert, die einzelnen Blechlagen sind gleichmäßig in der Metallträgermatrix verteilt und die Kräfte, die zum Verschlingen der Stapel erforderlich sind, werden verkleinert. Besonders vorteilhaft ist auch die Ausgestaltung der Metallträgermatrix aus vier Stapeln, da diese Ausgestaltung eine sehr gleichmäßige Verteilung der Berührungslinien der Blechlagen mit dem Mantel auf der inneren Mantelfläche ergibt.Catalyst forms with larger diameters can advantageously be designed in that the metal support matrix consists of a larger number of stacks. This reduces the thickness of the individual stacks, the individual sheet layers are evenly distributed in the metal support matrix, and the forces required for the stacks to be devoured are reduced. The configuration of the metal support matrix from four stacks is also particularly advantageous, since this configuration results in a very uniform distribution of the lines of contact of the sheet metal layers with the jacket on the inner jacket surface.

Die Ausführung nach Anspruch 6 ermöglicht die vorteilhafte Ausgestaltung einer elliptischen oder ellipsenähnlichen Katalysatorform. Die gleichmäßige Verteilung der Berührungslinien auf der inneren Mantelfläche bei elliptischen oder ellipsenähnlichen Katalysatorformen ist zweckmäßigerweise dadurch zu erhalten, daß eine runde Metallträgermatrix, die einen größeren Hohlraum im Inneren aufweist, zu der gewünschten elliptischen oder ellipsenähnlichen Form gepreßt wird.The embodiment according to claim 6 enables the advantageous embodiment of an elliptical or ellipse-like catalyst shape. The even distribution of the lines of contact on the inner circumferential surface in elliptical or ellipse-like catalyst forms can be expediently obtained by pressing a round metal support matrix, which has a larger cavity inside, into the desired elliptical or ellipse-like shape.

Die Form der Stapel, aus denen die Metallträgermatrix gefertigt wird, weist in der Seitenansicht immer zwei parallele Kanten auf. Die Enden der Stapel können in verschiedenen Winkeln auslaufen, so daß sich die im Kennzeichen des Anspruchs 1 beschriebenen geometrischen Formen ergeben.The shape of the stack from which the metal carrier matrix is made always has two parallel edges in the side view. The ends of the stack can end at different angles, so that the geometric shapes described in the characterizing part of claim 1 result.

Die Erfindung ist in der Zeichnung anhand von Ausführungsbeispielen dargestellt und wird im folgenden näher beschrieben. Es zeigen:

Fig. 1a
eine runde Katalysatorform und
Fig. 1b
die zugehörige Anordnung der Stapel vor dem Verschlingen,
Fig. 2a
eine quadratische Katalysatorform und
Fig. 2b
die zugehörige Anordnung der Stapel vor dem Verschlingen,
Fig. 3a
eine längliche Katalysatorform und
Fig. 3b
die zugehörige Anordnung der Stapel vor dem Verschlingen,
Fig. 4a
eine elliptische Katalysatorform und
Fig. 4b
die zugehörige Anordnung der Stapel vor dem Verschlingen,
Fig. 5a
eine längliche elliptische Katalysatorform und
Fig. 5b
die zugehörige Anordnung der Stapel vor dem Verschlingen,
Fig. 6a
eine elliptische Katalysatorform,
Fig. 6b
die zugehörige Anordnung der Stapel mit zentralem viereckigem Hohlraum vor dem Verschlingen und
Fig. 6c
die zugehörige Anordnung der Stapel mit viereckigem Hohlraum nach dem Verschlingen,
Fig. 7a
eine runde Katalysatorform aus acht Stapeln und
Fig. 7b
die zugehörige Anordnung der acht Stapel vor dem Verschlingen.
The invention is illustrated in the drawing using exemplary embodiments and is described in more detail below. Show it:
Fig. 1a
a round catalyst shape and
Fig. 1b
the associated arrangement of the stacks before devouring,
Fig. 2a
a square catalyst shape and
Fig. 2b
the associated arrangement of the stacks before devouring,
Fig. 3a
an elongated catalyst shape and
Fig. 3b
the associated arrangement of the stacks before devouring,
Fig. 4a
an elliptical catalyst shape and
Fig. 4b
the associated arrangement of the stacks before devouring,
Fig. 5a
an elongated elliptical catalyst shape and
Fig. 5b
the associated arrangement of the stacks before devouring,
Fig. 6a
an elliptical catalyst shape,
Fig. 6b
the associated arrangement of the stack with a central square cavity before engulfing and
Fig. 6c
the associated arrangement of the stacks with a square cavity after devouring,
Fig. 7a
a round catalyst shape made up of eight stacks and
Fig. 7b
the associated arrangement of the eight stacks before devouring.

In der Fig. 1a ist eine kreisrunde Katalysatorform und in der Fig. 1b die zugehörige Anordnung der Stapel (3) schematisch dargestellt. Die Stapel (3) sind in ihren Abmessungen identisch. Sie haben eine rechteckige Form, in der hier gezeigten Darstellung sind abwechselnd gewellte (4) und glatte (5) Blechlagen aufeinandergeschichtet. Die Stapel (3) sind derartig angeordnet, daß die Berührungslinien in der Seitenansicht die Form eines rechtwinkligen Kreuzes (6) ergeben, welches in der Zeichnung durch stärkere Linien dargestellt ist. Die Stapel (3) werden im Uhrzeigersinn um einen Symmetriepunkt (8) geschlungen, der hier der Mittelpunkt des Kreuzes (6) ist. Die so erzeugte Metallträgermatrix (1) wird anschließend in einen Mantel (2) eingeschoben. Die Blechlagen (4,5) der Metallträgermatrix (1) und der Mantel (2) werden im nächsten Produktionsschritt durch ein fügetechnisches Verfahren, vorzugsweise durch Verlöten, verbunden.A circular catalyst shape is shown in FIG. 1a and the associated arrangement of the stacks (3) is shown schematically in FIG. 1b. The dimensions of the stacks (3) are identical. They have a rectangular shape, in the illustration shown here corrugated (4) and smooth (5) sheet metal layers are layered on top of one another. The stacks (3) are arranged such that the lines of contact in the side view give the shape of a right-angled cross (6), which is shown in the drawing by thick lines. The stacks (3) are wrapped clockwise around a point of symmetry (8), which is the center of the cross (6) here. The metal carrier matrix (1) thus produced is then inserted into a jacket (2). The sheet metal layers (4, 5) of the metal carrier matrix (1) and the jacket (2) are connected in the next production step by a joining technique, preferably by soldering.

In der Fig. 2 wird eine quadratische Katalysatorform (mit abgerundeten Ecken) gezeigt. Die Anordnung der Stapel (3) ist, wie bei der runden Katalysatorform, kreuzförmig. Die einzelnen Stapel (3) sind hierbei in der Seitenansicht aber nicht rechteckig, sondern am außenliegenden Ende spitz zulaufend, d.h. trapezförmig. Der Fertigungsprozeß verläuft wie in der Beschreibung zu Fig. 1 angegeben.2 shows a square catalyst shape (with rounded corners). The arrangement of the stacks (3) is cruciform, as in the round catalyst shape. The individual stacks (3) are not rectangular in the side view, but tapering at the outer end, ie trapezoidal. The manufacturing process proceeds as indicated in the description of FIG. 1.

In der Fig. 3a wird eine längliche Katalysatorform und in der Fig. 3b die zugehörige Anordnung der Stapel (3) schematisch dargestellt. Die Anordnung der Stapel (3) ist ebenfalls kreuzförmig. Allerdings sind die Stapel (3) oberhalb und unterhalb einer Verschiebeebene E-E, die zur Zeichenebene senkrecht steht, relativ zueinander verschoben, so daß sich ein verschobenes Kreuz (7) ergibt, welches in der Zeichnung durch stärkere Linien dargestellt ist. Der Abstand der senkrecht auf der Verschiebeebene E-E stehenden Stapel (3) bestimmt die Breite des Katalysators. Die Stapel (3) werden, wie in der Beschreibung zu Fig. 1 bereits dargestellt, im Uhrzeigersinn um den Symmetriepunkt (8), der auf der Verschiebeebene E-E und mittig zu beiden verschobenen Stapeln (3) angeordnet ist, geschlungen. Die weiteren Fertigungsschritte erfolgen wie oben bereits angegeben.An elongated catalyst shape is shown in FIG. 3a and the associated arrangement of the stacks (3) is shown schematically in FIG. 3b. The arrangement of the stacks (3) is also cruciform. However, the stacks (3) above and below a displacement plane E-E, which is perpendicular to the plane of the drawing, are displaced relative to each other, so that a displaced cross (7) results, which is shown in the drawing by thick lines. The distance between the stacks (3) which are perpendicular to the displacement plane E-E determines the width of the catalyst. The stacks (3), as already shown in the description of FIG. 1, are wrapped clockwise around the point of symmetry (8), which is arranged on the displacement plane E-E and centrally to both displaced stacks (3). The further manufacturing steps take place as already stated above.

In den Fig. 4a und 5a sind elliptische Katalysatorformen und in den Fig. 4b und 5b die zugehörigen Anordnungen der Stapel (3) schematisch dargestellt. Die Anordnung der Stapel (3) ist ähnlich der in Fig. 3b gezeigten Anordnung. Die hier gezeigten Stapel (3) sind aber in der Dicke und in der Länge variiert. Daraus ergeben sich weitere unterschiedliche Formen für den Katalysator. Der Herstellungsprozeß verläuft wie in der Beschreibung zu Fig. 1 erläutert.4a and 5a schematically illustrate elliptical catalyst shapes and in FIGS. 4b and 5b the associated arrangements of the stacks (3). The arrangement of the stacks (3) is similar to the arrangement shown in Fig. 3b. The stacks (3) shown here vary in thickness and length. This results in further different forms for the catalyst. The manufacturing process proceeds as explained in the description of FIG. 1.

In der Fig. 6a ist eine weitere Ausgestaltung einer elliptischen Katalysatorform, in der Fig. 6b die zugehörige Anordnung der Stapel vor dem Verschlingen und in der Fig. 6c die zugehörige Anordnung der Stapel nach dem Verschlingen dargestellt. Die Stapel (3) sind in der Seitenansicht parallelogrammförmig. Sie sind kreuzförmig so um den Symmetriepunkt (8) angeordnet, daß sich ein zentraler viereckiger Hohlraum (9) bildet. Die Stapel (3) werden im Uhrzeigersinn um den Hohlraum (9) bzw. den Symmetriepunkt (8), der den Mittelpunkt des Hohlraums (9) bildet, verschlungen. Nach dem Verschlingen ergibt sich eine runde Form der Metallträgermatrix (1), die in Fig. 6c schematisch dargestellt ist. Die Metallträgermatrix (1) wird, von dieser runden Form ausgehend, mit Hilfe von geeigneten Werkzeugen in die gewünschte elliptische Form gepreßt. Dabei wird der zentrale Hohlraum (9) geschlossen. Die Metallträgermatrix (1) wird in einen Mantel (2) eingesetzt und mit diesem fügetechnisch verbunden.FIG. 6a shows a further embodiment of an elliptical catalytic converter shape, FIG. 6b shows the associated arrangement of the stacks before devouring, and FIG. 6c shows the associated arrangement of the stacks after devouring. The stacks (3) are in the side view parallelogram. They are arranged in a cross shape around the point of symmetry (8) that a central square cavity (9) is formed. The stacks (3) are devoured clockwise around the cavity (9) or the point of symmetry (8), which forms the center of the cavity (9). After the devouring, a round shape of the metal carrier matrix (1) results, which is shown schematically in FIG. 6c. Starting from this round shape, the metal support matrix (1) is pressed into the desired elliptical shape using suitable tools. The central cavity (9) is closed. The metal carrier matrix (1) is inserted into a jacket (2) and connected to it by joining technology.

In der Fig. 7a ist eine runde Katalysatorform dargestellt, die aus acht Stapeln (3) besteht. Fig. 7b zeigt die symmetrische Annordnung der acht parallelogrammförmigen Stapel (3) um den Symmetriepunkt (8) vor dem Verschlingen. Die Stapel (3) sind in der Dicke und der Länge gleich. Ihre Stirnseiten sind mit den Seitenflächen der jeweils benachbarten Stapel (3) zur Anlage gebracht, die freien Enden der Stapel (3) sind gleichsinnig um den Symmetriepunkt (8) verschlungen. Die so erzeugte Metallträgermatrix (1) wird in den Mantel (2) eingesetzt und mit diesem fügetechnisch verbunden.In Fig. 7a a round catalyst shape is shown, which consists of eight stacks (3). Fig. 7b shows the symmetrical arrangement of the eight parallelogram stacks (3) around the point of symmetry (8) before devouring. The stacks (3) are the same in thickness and length. Their end faces are brought into contact with the side surfaces of the adjacent stack (3), the free ends of the stack (3) are intertwined in the same direction around the point of symmetry (8). The metal carrier matrix (1) thus produced is inserted into the jacket (2) and connected to it by joining technology.

Wie die wenigen Ausführungsbeispiele bereits zeigen, ist eine Vielfalt von weiteren Formvarianten mit Hilfe der erfindungsgemäßen Metallträgermatrix (1) möglich.As the few exemplary embodiments already show, a variety of further shape variants is possible with the aid of the metal carrier matrix (1) according to the invention.

Claims (9)

Metallträgermatrix für einen katalytischen Reaktor zur Abgasreinigung, insbesondere für Brennkraftmaschinen, bestehend aus gewellten oder aus gewellten und glatten Metallbändern, die zu mehreren aneinandergrenzenden Schichten gefaltet oder gestapelt und verschlungen und fügetechnisch mit einem Mantel verbunden sind, dadurch gekennzeichnet, daß mindestens zwei Stapel (3), deren Seitenansicht die Form eines Rechtecks, eines Trapezes oder eines Parallelogrammes aufweist, mit jeweils einem Ende miteinander zur Anlage gebracht und gemeinsam gleichsinnig verschlungen sind und die freien Enden mit dem umhüllenden Mantel (2) in Kontakt gebracht und verbunden sind.Metal support matrix for a catalytic reactor for exhaust gas purification, in particular for internal combustion engines, consisting of corrugated or of corrugated and smooth metal strips, which are folded or stacked and stacked and intertwined and joined and joined together by means of a jacket, characterized in that at least two stacks (3) , the side view of which is in the form of a rectangle, a trapezoid or a parallelogram, each with one end brought into contact with one another and intertwined in the same direction and the free ends are brought into contact and connected to the enveloping jacket (2). Metallträgermatrix nach Anspruch 1, dadurch gekennzeichnet, daß die Metallträgermatrix (1) aus vier Stapeln (3) besteht, die punktsymmetrisch angeordnet und um einen Symmetriepunkt (8) verschlungen sind.Metal support matrix according to claim 1, characterized in that the metal support matrix (1) consists of four stacks (3) which are arranged in a point-symmetrical manner and are entwined around a point of symmetry (8). Metallträgermatrix nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Metallträgermatrix (1) aus Stapeln (3) besteht, die sowohl in der Dicke als auch in der Länge unterschiedliche Abmessungen haben.Metal support matrix according to claim 1 or 2, characterized in that the metal support matrix (1) consists of stacks (3) which have different dimensions both in thickness and in length. Metallträgermatrix nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß für runde oder annähernd quadratische Querschnittsformen der Metallträgermatrix (1) die Anlageflächen der vier aneinandergelegten Stapel (3) vor dem Verschlingen die Form eines Kreuzes (6) bilden.Metal support matrix according to Claim 1, 2 or 3, characterized in that, for round or approximately square cross-sectional shapes of the metal support matrix (1), the contact surfaces of the four stacks (3) placed against one another form the shape of a cross (6) before they are devoured. Metallträgermatrix nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß für elliptische oder sonstige Querschnittsformen der Metallträgermatrix (1) die Anlageflächen der vier aneinandergelegten Stapel (3) vor dem Verschlingen die Form eines in der Verschiebeebene E-E verschobenen Kreuzes (7) bilden.Metal support matrix according to claim 1, 2 or 3, characterized in that, for elliptical or other cross-sectional shapes of the metal support matrix (1), the contact surfaces of the four stacks (3) placed against one another form the shape of a cross (7) displaced in the displacement plane EE prior to being devoured. Metallträgermatrix nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß für elliptische oder ellipsenähnliche Querschnittsformen der Metallträgermatrix (1) vier parallelogrammförmige Stapel (3) kreuzförmig so aneinandergelegt werden, daß sich im Zentrum der Metallträgermatrix (1) ein viereckiger Hohlraum (9) ergibt, der nach dem Verschlingen dadurch verschlossen wird, daß die Metallträgermatrix (1) zu der gewünschten elliptischen oder ellipsenähnlichen Querschnittsform gepreßt wird.Metal support matrix according to Claim 1, 2 or 3, characterized in that for parallel or elliptical cross-sectional shapes of the metal support matrix (1), four parallelogram-shaped stacks (3) are placed in a cross shape so that a square cavity (9) results in the center of the metal support matrix (1) which is closed after the devouring in that the metal carrier matrix (1) is pressed to the desired elliptical or elliptical cross-sectional shape. Metallträgermatrix nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Metallträgermatrix (1) im Zentralbereich punktsymmetrisch ausgebildet ist und in den Randbereichen von der punktsymmetrischen Form abweicht.Metal support matrix according to one of the preceding claims, characterized in that the metal support matrix (1) is point-symmetrical in the central region and deviates from the point-symmetrical shape in the edge regions. Metallträgermatrix nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Metallbänder (4,5) der Metallträgermatrix (1) durch ein fügetechnisches Verfahren untereinander verbunden sind.Metal support matrix according to one of the preceding claims, characterized in that the metal strips (4, 5) of the metal support matrix (1) are connected to one another by a joining technique. Metallträgermatrix nach Anspruch 1, 3, 7 oder 8, dadurch gekennzeichnet, daß die Metallträgermatrix (1) aus mehr als vier Stapeln (3), vorzugsweise aus acht Stapeln (3) besteht, die sternförmig um einen Symmetriepunkt (8) angeordnet und gleichsinning um diesen verschlungen sind, wobei sich die Enden der Stapel (3) im Symmetriepunkt (8) unter Einschließung eines spitzen Winkels berühren.Metal support matrix according to claim 1, 3, 7 or 8, characterized in that the metal support matrix (1) consists of more than four stacks (3), preferably of eight stacks (3), which are arranged in a star shape around a point of symmetry (8) and in the same direction these are intertwined, the ends of the stacks (3) touching one another at the point of symmetry (8), including an acute angle.
EP91105500A 1990-05-21 1991-04-08 Metal carrier matrix for a catalytic reactor Expired - Lifetime EP0458045B1 (en)

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DE4016276A DE4016276C1 (en) 1990-05-21 1990-05-21
DE4016276 1990-05-21

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US (1) US5342588A (en)
EP (1) EP0458045B1 (en)
JP (1) JPH0736896B2 (en)
DE (2) DE4016276C1 (en)
ES (1) ES2056512T3 (en)

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DE59102153D1 (en) 1994-08-18
US5342588A (en) 1994-08-30
ES2056512T3 (en) 1994-10-01
EP0458045B1 (en) 1994-07-13
JPH04227855A (en) 1992-08-17
DE4016276C1 (en) 1991-06-20

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