EP1319120B1 - Montage d'un ensemble catalyseur-support au moyen d'un palier fixe et d'un palier libre - Google Patents

Montage d'un ensemble catalyseur-support au moyen d'un palier fixe et d'un palier libre Download PDF

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Publication number
EP1319120B1
EP1319120B1 EP01985283A EP01985283A EP1319120B1 EP 1319120 B1 EP1319120 B1 EP 1319120B1 EP 01985283 A EP01985283 A EP 01985283A EP 01985283 A EP01985283 A EP 01985283A EP 1319120 B1 EP1319120 B1 EP 1319120B1
Authority
EP
European Patent Office
Prior art keywords
arrangement
housing
bearing
fixed bearing
casing tube
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
EP01985283A
Other languages
German (de)
English (en)
Other versions
EP1319120A1 (fr
Inventor
Rolf BRÜCK
Wolfgang Maus
Katrin Konieczny
Jörg-Roman KONIECZNY
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
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 Emitec Gesellschaft fuer Emissionstechnologie mbH filed Critical Emitec Gesellschaft fuer Emissionstechnologie mbH
Publication of EP1319120A1 publication Critical patent/EP1319120A1/fr
Application granted granted Critical
Publication of EP1319120B1 publication Critical patent/EP1319120B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • 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
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • 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
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F01N3/2864—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets comprising two or more insulation layers

Definitions

  • the present invention relates to an arrangement for fixing a catalyst carrier body in a housing according to the preamble of claim 1.
  • Such catalyst carrier bodies are used, for example, in exhaust systems of internal combustion engines, in particular in automobile construction.
  • a holder for a metallic catalytic converter carrier body in a jacket tube is proposed.
  • the catalyst carrier body is embedded or attached in such a way that thermal elongation is not hindered.
  • the holder is designed with two or more spacers, as a result of which the catalyst carrier body is held within the casing tube at a distance of a few millimeters. Only one spacer is firmly connected to both the catalyst carrier body and the jacket tube. In this way it is prevented that due to the different thermal expansion behavior of the casing tube and the catalyst carrier body, stresses occur which can negatively influence the service life of such a holder.
  • the arrangement according to the invention for fixing a catalyst carrier body in a housing comprises a catalyst carrier body with a jacket tube and with a honeycomb body through which an exhaust gas can flow.
  • Such catalyst carrier bodies are used in particular for cleaning an exhaust gas or for the catalytic conversion of pollutants in the internal combustion engine which are present in the exhaust gas.
  • the honeycomb body is connected, in particular soldered, to the casing tube at least in a partial area.
  • the jacket tube has at least a first and a second bulge with flank surfaces.
  • the housing has at least a first and a second recess with side faces.
  • the arrangement according to the invention is characterized in that the bulges extend at least partially into the depressions in such a way that a fixed bearing and at least one floating bearing are formed with an axial bearing play.
  • the fixed bearing ensures permanent fixation of the catalyst carrier body in the housing. Due to its axial bearing play, the floating bearing allows the catalyst carrier body to expand, which occurs due to the temperature increases in the catalyst carrier body.
  • the at least first and / or second bulge are axially circumferential. This has the consequence that a uniform storage over the circumference of the jacket tube is guaranteed.
  • flank surfaces of the bulges and the outer surface of the tubular casing each enclose an outside angle.
  • the outside angle of the fixed bearing is smaller than the outside angle of the floating bearing.
  • the outside angle of the fixed bearing is preferably in the range from 90 ° to 110 °. In this way, high axial forces can also be absorbed via the fixed bearing, such as occur, for example, due to body vibrations and pulsation in the exhaust gas flow.
  • the housing has an inner surface, the side surfaces of the depressions and the inner surface of the housing each enclosing an inner angle and the inner angle of the fixed bearing being smaller than the inner angle of the floating bearing.
  • the side surfaces of the depressions corresponding to the flank surfaces of the bulges are provided, so that the largest possible form fit is ensured between the bulge and the depression. This enables good structure-borne noise damping, in particular in the case of the fixed bearing, and good radial guidance, if appropriate, in the case of the floating bearing.
  • the inside angle is at most 5 ° larger than the outside angle of the fixed bearing.
  • the inside angle is preferably the same size as the outside angle of the fixed bearing.
  • An equal size of the inner angle and the outer angle has the advantage that the flank surfaces and the side surfaces are arranged parallel to one another. This enables a particularly stable embodiment of a fixed or floating bearing.
  • the depressions have a depth and the bulges have a height, the depth being at least 2 mm greater than the height. This also allows a radial thermal expansion of the catalyst carrier body, whereby the occurrence of thermal stresses in the bearing is prevented.
  • flank surfaces of the bulges lie against the side surfaces of the depressions, at least in the fixed bearing.
  • a flat contact area is formed.
  • a filling material is arranged at least in the at least one floating bearing between the flank surfaces of the bulges and the side surfaces of the depressions. It is preferably a material that is temperature-resistant and suitable for use in an exhaust system.
  • a filling material such as mica, allows thermal expansion of the catalyst carrier body, the thermal expansion behavior of the filling material being adapted such that thermally generated gaps or cavities between the casing tube and the housing are closed by the filling material. This ensures an exact fixation in the storage.
  • the catalyst carrier body is essentially surrounded by the filler material. The result of this is that the entire catalyst carrier body is mounted with little vibration because the filler material significantly reduces a transition of the acceleration forces from the housing to the catalyst carrier body.
  • a circumferential cavity is formed between the bulges of the casing tube and the honeycomb body, in which a heat-insulating medium, in particular air, is preferably arranged.
  • a heat-insulating medium in particular air
  • the bulges have a further function in addition to the storage of the catalyst carrier body.
  • the cavity prevents heat flow from the honeycomb body to the tubular casing, which improves the light-off behavior of the honeycomb body. This allows earlier catalytic conversion of pollutants in an exhaust gas flowing through the honeycomb body.
  • the bulge of the fixed bearing has a first axial length of 1 to 20 mm, the bulge of the floating bearing preferably having a second axial length of 10 to 30 mm.
  • the first axial length can For example, be made smaller because the inside and outside angles of the fixed bearing are made smaller than that of the floating bearing. If the bulge of the fixed bearing is designed as a sheet metal arranged in the form of a collar, the first axial length can be limited to a few millimeters.
  • the floating bearing only has the task of providing radial guidance and ensuring thermal expansion in the axial direction. The bearing play required for this must therefore also be taken into account when designing the axial second length.
  • exhaust gas flows through the honeycomb body in a preferred direction of flow, the fixed bearing being arranged downstream of the floating bearing.
  • the hottest area of the honeycomb body is usually located near the entry side. The result of this is that the thermal expansions also occur to an increased extent in this area. An arrangement of the floating bearing in this area allows these thermal expansions, which prevents lifelong stresses.
  • the housing is made in two parts with half-shells, these half-shells being joined, in particular welded, with a longitudinal seam.
  • the design of a housing with two half-shells supports, for example, the arrangement of filler material around the catalyst carrier body during assembly, in order to enable the catalyst carrier body to be decoupled from the body vibrations of the housing.
  • FIG. 1 shows schematically and in a section an embodiment of an arrangement according to the invention for fixing a catalyst carrier body 1 in a housing 2 is.
  • the casing tube 3 is connected to the honeycomb body 4 in a partial region 7, preferably soldered.
  • the casing tube 3 has a first 5 and a second bulge 6.
  • the housing 2 has a first 8 and a second recess 9.
  • the bulges 5 and 6 extend into the recesses 8 and 9 in such a way that a fixed bearing 20 and a floating bearing 21 are formed with an axial bearing play 11.
  • the first 5 and the second bulge 6 are axially circumferential 10.
  • the floating bearing 21 is arranged upstream 14 of the fixed bearing 20.
  • the first bulge 5 of the tubular casing 3 has a cavity 28 which surrounds the honeycomb body 4 and in which a heat-insulating medium is arranged. This cavity 28 prevents heat transfer from the honeycomb body 4 to the casing tube 3, which ensures faster heating of the honeycomb body 4 and thus also earlier catalytic conversion of pollutants in the exhaust gas.
  • the second bulge 6 is designed as a kind of collar, which was welded onto the casing tube 3. On the one hand, this ensures a continuous connection of the casing tube 3 to the honeycomb body 4 in the partial region 7 and also allows the first axial length 30 (not shown) of the fixed bearing 20 to be made relatively small.
  • FIG. 2 shows an end view of an embodiment of a honeycomb body 4 with a casing tube 3.
  • the honeycomb body 4 has sheet metal layers 12 which are structured in such a way that an exhaust gas can flow through them.
  • the sheet metal layers 12 comprise smooth 32 and corrugated sheets 33, so that channels 13 through which exhaust gas can flow are formed.
  • the sheet metal layers 12 were layered or stacked and then looped or wound, whereby the honeycomb body 4 is formed.
  • FIG. 3 schematically shows a detailed view of a bulge 5, 6 of the casing tube 3 with a corresponding depression 8, 9 of the housing 2.
  • the casing tube 3 has a casing surface 17 which enclose an outside angle 18 with the flank surfaces 15 of the bulge 5, 6.
  • the bulge 5, 6 has a height 24 starting from the lateral surface 17.
  • the bulge 5, 6 extends at least partially into a corresponding depression 8, 9.
  • the depressions 8 and 9 have two preferably circumferential side surfaces 16 which enclose an inner angle 19 with the inner surface 22 of the housing 2.
  • a symmetrical structure of the depressions 8 and 9 or bulges 5 and 6 is not necessary, but reduces the manufacturing effort.
  • the depth 23 of the depression 8, 9 is preferably at least 2 mm greater than the height 24 of the bulge 5, 6.
  • FIG. 4 shows, in perspective and schematically, a further embodiment of an arrangement according to the invention for fixing a catalyst carrier body 1 in a housing 2.
  • the housing 2 is designed with two half-shells 26 which, after the catalyst carrier body 1 has been arranged in the interior of the housing 2, on two Longitudinal seams 27 are connected to each other.
  • the half-shells 26 are preferably welded to the longitudinal seams 27.
  • the housing 2 consisting of the half-shells 26 also has depressions 8 and 9, which correspond to the bulges 5 and 6 of the tubular casing 3 of the catalyst carrier body 1.
  • This configuration of the housing 2 with two half-shells 26 is particularly suitable for the arrangement of filler material 25 (not shown) which surrounds the catalyst carrier body 1 and a forwarding prevented from body vibrations of the housing 2 on the casing tube 3.
  • the filling material 25 is arranged so that the end face of the honeycomb body 4 is not reduced.
  • the arrangement according to the invention ensures permanent fixation of the catalyst carrier body, in particular in the event of body vibrations of the exhaust system of an internal combustion engine, which can be advantageously used in particular in the case of honeycomb bodies made of very thin metal foils with a thickness of less than 30 ⁇ m.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un agencement pour fixer un ensemble catalyseur-support (1) dans un carter (2). Cet ensemble catalyseur-support (1) comprend un tube de protection (3) et une structure en nid d'abeilles (4) pouvant être traversée par un gaz d'échappement. Le tube de protection (3) comprend au moins une première (5) et une deuxième partie bombée (6), présentant des flancs (15), et il est relié à la structure en nid d'abeilles (4) au moins au niveau d'une zone partielle (7). Le carter (2) comprend au moins une première (8) et une deuxième partie creuse (9), présentant des faces latérales (16). Cet agencement se caractérise en ce que les parties bombées (5, 6) s'étendent au moins partiellement dans les parties creuses (8, 9) de façon à former un palier fixe (20) et au moins un palier libre (21) présentant un jeu (11) axial (10) de palier. Cet agencement garantit une fixation durable de l'ensemble catalyseur-support, notamment dans le cas de vibrations de structure apparaissant dans le système d'échappement d'un moteur à combustion interne.

Claims (13)

  1. Ensemble pour fixer un corps support de catalyseur (1) dans un boîtier (2), dans le cas duquel le corps support de catalyseur (1) a un tube d'enveloppe (3) et un corps en nids d'abeilles (4) pouvant être parcouru par un gaz d'échappement, dans quel cas le tube d'enveloppe (3) a au moins une première (5) et une deuxième saillie (6) avec des surfaces de flancs (15) et est relié au corps en nids d'abeilles (4) au moins dans une zone partielle (7) et dans quel cas le boîtier (2) a au moins un premier (8) et un deuxième creux (9) avec des faces latérales (16), caractérisé en ce que les saillies (5, 6) s'étendent au moins partiellement de telle manière dans les creux (8, 9) qu'un palier fixe (20) et au moins un palier libre (21) sont formés avec un jeu de palier (11) en direction axiale (10).
  2. Ensemble selon la revendication 1, caractérisé en ce que la première (5) et/ou la deuxième saillie (6) s'étend de manière périphérique en direction axiale (10).
  3. Ensemble selon la revendication 1 ou 2, dans quel cas le tube d'enveloppe (3) a une surface d'enveloppe (17), caractérisé en ce que les surfaces de flancs (15) et la surface d'enveloppe (17) enferment respectivement un angle extérieur (18) et que l'angle extérieur (18) du palier fixe (20) est plus petit que l'angle extérieur (18) du palier libre (21).
  4. Ensemble selon l'une des revendications 1 à 3, dans quel cas le boîtier (2) a une surface intérieure (22), caractérisé en ce que les faces latérales (16) et la surface intérieure (22) enferment respectivement un angle intérieur (19) et que l'angle intérieur (19) du palier fixe (20) est plus petit que l'angle intérieur (19) du palier libre (21).
  5. Ensemble selon l'une des revendications 1 à 4, dans quel cas le tube d'enveloppe (3) a des angles extérieurs (18) et le boîtier (2) des angles intérieurs (19), caractérisé en ce que l'angle intérieur (19) du palier fixe (20) est au maximum 5° plus grand que l'angle extérieur (18) du palier fixe (20), qu'il est notamment égal à l'angle extérieur (18) du palier fixe (20).
  6. Ensemble selon l'une des revendications 1 à 5, caractérisé en ce que les creux (8, 9) ont une profondeur (23) et les saillies (5, 6) une hauteur (24), la profondeur (23) étant au moins 2 mm plus grande que la hauteur (24).
  7. Ensemble selon l'une des revendications 1 à 6, dans quel cas le tube d'enveloppe (3) a des surfaces de flancs (15) et le boîtier (2) des faces latérales (16), caractérisé en ce qu'au moins dans le cas du palier fixe (20) les surfaces de flancs (15) des saillies (5, 6) s'appliquent contre les faces latérales (16) des creux (8, 9).
  8. Ensemble selon l'une des revendications 1 à 7, dans quel cas le tube d'enveloppe (3) a des surfaces de flancs (15) et le boîtier (2) des faces latérales (16), caractérisé en ce qu'au moins dans le cas du palier libre (21) un matériau de remplissage (25), notamment du mica, est agencé entre les surfaces de flancs (15) des saillies (5, 6) et les faces latérales (16) des creux (8, 9).
  9. Ensemble selon l'une des revendications 1 à 8, caractérisé en ce que le corps support de catalyseur (1) est entouré sensiblement par le matériau de remplissage (25).
  10. Ensemble selon l'une des revendications 1 à 9, caractérisé en ce qu'une cavité périphérique (28) est formée entre les saillies (5, 6) du tube d'enveloppe (3) et le corps en nids d'abeilles (4), cavité périphérique (28) dans laquelle un médium à isolation thermique (29), notamment de l'air, est agencé de préférence.
  11. Ensemble selon l'une des revendications 1 à 10, caractérisé en ce que la saillie (5, 6) du palier fixe (20) a une première longueur axiale (30) de 1 à 20 mm, la saillie (6, 5) du palier libre (21) présentant de préférence une deuxième longueur axiale (31) de 10 à 30 mm.
  12. Ensemble selon l'une des revendications 1 à 11, dans quel cas le corps en nids d'abeilles (4) est parcouru par le gaz d'échappement dans un sens d'écoulement préféré (14), caractérisé en ce que le palier fixe (20) est agencé en aval (14) du palier libre (21).
  13. Ensemble selon l'une des revendications 1 à 12, caractérisé en ce que le boîtier (2) est réalisé en deux parties, ces demi-coquilles (26) étant reliées par technique de jointoiement, notamment soudées, au niveau d'un joint longitudinal (27).
EP01985283A 2000-09-20 2001-09-14 Montage d'un ensemble catalyseur-support au moyen d'un palier fixe et d'un palier libre Expired - Lifetime EP1319120B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10046610A DE10046610C1 (de) 2000-09-20 2000-09-20 Fest-Los-Lagerung eines Katalysator-Trägerkörpers
DE10046610 2000-09-20
PCT/EP2001/010618 WO2002025076A1 (fr) 2000-09-20 2001-09-14 Montage d'un ensemble catalyseur-support au moyen d'un palier fixe et d'un palier libre

Publications (2)

Publication Number Publication Date
EP1319120A1 EP1319120A1 (fr) 2003-06-18
EP1319120B1 true EP1319120B1 (fr) 2004-03-31

Family

ID=7656980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01985283A Expired - Lifetime EP1319120B1 (fr) 2000-09-20 2001-09-14 Montage d'un ensemble catalyseur-support au moyen d'un palier fixe et d'un palier libre

Country Status (6)

Country Link
US (1) US7258842B2 (fr)
EP (1) EP1319120B1 (fr)
JP (1) JP2004509278A (fr)
AU (1) AU2002223543A1 (fr)
DE (2) DE10046610C1 (fr)
WO (1) WO2002025076A1 (fr)

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RU2706923C2 (ru) * 2015-05-19 2019-11-21 Басф Корпорейшн Катализированный сажевый фильтр для применения при пассивном селективном каталитическом восстановлении
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US20030180198A1 (en) 2003-09-25
AU2002223543A1 (en) 2002-04-02
DE10046610C1 (de) 2002-04-25
WO2002025076A1 (fr) 2002-03-28
JP2004509278A (ja) 2004-03-25
US7258842B2 (en) 2007-08-21
EP1319120A1 (fr) 2003-06-18
DE50101869D1 (de) 2004-05-06

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