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
  • F01N3/2875—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration by using elastic means, e.g. spring leaves, for retaining catalyst body in the 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
  • 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
• • 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
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
  • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
  • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• • 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
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49345—Catalytic device making
• • 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.]
• • 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
  • Y10T428/1241—Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]

Definitions

• the invention relates to a honeycomb body arrangement
• a honeycomb body arrangement comprising a honeycomb body with a fluid inlet side and a fluid outlet side, in particular catalyst carrier bodies for motor vehicles, made of sheet metal layers which are at least partially structured and which, after their layering and / or winding, form channels for a fluid to flow through, the honeycomb body being formed by an inner jacket tube and is surrounded by an outer jacket tube arranged concentrically thereto, and wherein the inner jacket tube is designed as a corrugated tube at least in an axial partial region.
• honeycomb arrangements are known per se. DE 2 300 704 z.
• the elastic elements are either arranged in two rows, in each case on the fluid inlet and fluid outlet side, or in one row, over the entire length of the honeycomb body, and each have a flange for connection to a pipeline.
• honeycomb bodies constructed from sheet metal layers it is known, for example from DE 39 41 642 AI to prevent stresses due to thermal expansions, to surround sheet metal layers with an outer jacket tube made of metal, which has short waves at a short distance, so that a honeycomb body can expand and shrink with such an outer jacket tube.
• honeycomb body arrangements with an inner and an outer jacket tube, which should be displaceable against one another at least in some areas there are also many manufacturing problems because, particularly when soldering or welding connections, it must be ensured that undesired additional connections between the two jacket tubes do not mutually damage one another Hinder movement.
• the invention is based on the object of specifying a honeycomb body arrangement which can be produced reproducibly with a constant quality and which, through a good compensation of mechanical and thermal loads, ensures permanent and safe storage of a honeycomb body constructed from sheet metal layers in a metallic housing even under special operating loads.
• An additional task is also to achieve a good cold start behavior of the catalytic exhaust gas cleaning device.
• the inner jacket tube of the honeycomb body in addition to an axial partial area designed as a corrugated tube, has at least one further axial partial area which lies flush against the honeycomb body, and in that the corrugated partial area and the outer jacket tube are connected to one another in an axially-partially joining manner, and in that the smooth partial area and the Honeycomb bodies are connected to one another at least axially and partially mechanically, advantageously, mechanical and thermal loads can be equally well balanced and permanent and secure storage of the honeycomb body in the housing can be ensured.
• the honeycomb body arrangement is preferably distinguished in that a smooth partial region is arranged on the fluid inlet side, the At least one corrugated section and at least one further smooth section follow, so that a total of n corrugated sections and n + 1 smooth sections are arranged, n being an integer and greater than or equal to 1.
• a smooth partial area acting as an air gap insulation, rapid activation of the catalytic reaction at the beginning of the exposure to exhaust gas to be cleaned is advantageously ensured.
• the thermal insulation can also be improved by an insulating mat, for example made of ceramic material, which has very low heat conduction and convection properties.
• the one corrugated partial region is arranged predominantly on the fluid inlet side.
• the smooth section of the inner jacket tube on the inlet side is only short, e.g. 5 to 25 mm, and in particular the mechanical loads caused by the exhaust gas, which sometimes pulsates strongly, are advantageously absorbed.
• the one corrugated partial area can be arranged axially-centrally, that is to say seen essentially in the middle of the honeycomb body in the axial direction. This has the advantage that you do not have to pay attention to the installation direction during assembly.
• the one corrugated partial area can also be arranged predominantly on the fluid outlet side, in particular when a long, smooth first partial area is desired in order to achieve a large volume in the honeycomb body which is insulated from the outer casing tube.
• corrugated partial area is arranged on the fluid inlet side behind a smooth tea area and another corrugated partial area is arranged in front of a smooth partial area on the fluid outlet side.
• the first corrugated partial area is arranged on the fluid inlet side
• the second corrugated partial area is arranged axially centrally
• the third corrugated tea area is arranged on the fluid outlet side, each alternating with smooth partial areas.
• the inner jacket tube must be connected to the honeycomb body in at least one area and to the outer jacket tube in one area. All smooth tea areas are preferably at least partially connected to the honeycomb body, in particular brazed. In addition, all corrugated tea areas are preferably connected to the outer jacket tube, preferably also brazed or welded. It is important, however, not to connect all of the corrugation crests to the outer jacket tube, since otherwise the effect of the corrugations as a compensator for expansion would be impeded. At least a part of the wave crests should remain without connections, in particular two wave crests adjacent to a smooth tea area of the inner jacket tube should not be connected to the outer jacket tube.
• the sum of the axial lengths of the corrugated tea areas is more than half, preferably more than two thirds, of the total length of the honeycomb body. This advantageously facilitates in particular the balancing of mechanical loads.
• the tube corrugations of the corrugated tea areas viewed over their longitudinal axial section, have flank areas of great steepness, in particular even an omega shape.
• the hose corrugations ensures that the inner jacket tube expands and shrinks in accordance with the load.
• the hose corrugations are flattened regardless of their remaining shape in the area of their technical connection to the outer jacket tube.
• Such flattened areas enable a flat, high mechanical and thermal load-bearing connection. According to the invention, therefore, each corrugated tea area provided for a technical connection with the outer casing tube is dimensioned in its partial length such that known connection methods, in particular soldering and / or welding processes, are easy to use.
• the partial technical connection between a corrugated tea area and the outer jacket tube therefore extends over 1 to 5, preferably over 2 to 4, in particular over 3, crests of the hose corrugation of the corrugated tea area, so that the connections can be reliably and permanently manufactured according to their use are.
• the ratio of hose corrugations connected by joining to hose corrugations not connected by joining is preferably at most 1: 1.5, preferably 1: 4, so that a compensation, in particular of mechanical loads, is ensured.
• the first smooth tea area arranged on the ruid entry side is at least 5 mm long, preferably at least 7.5 mm, in particular about 10 mm, the other smooth tea areas are at least 15 mm long, preferably at least 20 mm, in particular about 25 mm.
• the honeycomb body which is in particular an axially flowable catalyst carrier body, can have any geometric, preferably cylindrical or conical, shape.
• FIGS 1 to 4 preferred embodiments of a honeycomb body arrangement according to the invention with a cylindrical honeycomb body partially in longitudinal axial section;
• Figure 5 shows a further embodiment of a honeycomb body arrangement with a conical honeycomb body partially in longitudinal axial section
• FIGS. 6 and 7 enlarged sections of alternative hose corrugation forms of a corrugated tea area according to FIGS. 1 to 5.
• a honeycomb body arrangement comprising a cylindrical or oval honeycomb body 1, in particular as a catalyst carrier body for motor vehicles with a catalytically active coating, with a fluid inlet side 2 and a fluid outlet side 3, composed of at least one partially structured sheet metal layers which, after their layering and / or winding, flow through channels for a fluid to flow through, the honeycomb body 1 being surrounded by an inner jacket tube 4 and an outer jacket tube 5 arranged concentrically therewith.
• a smooth tea area 7 is first arranged on the fluid inlet side 2, followed by a corrugated tea area 6 and another smooth tea area 7.
• the first smooth tea area 7 has a length of about 5 mm and is therefore significantly shorter than the next tea area.
• the corrugated tea area 6 arranged predominantly on the fluid inlet side is axially partially 8 on the fluid inlet side 2 over a length of z.
• Such a honeycomb body arrangement with a honeycomb body 1 of a conventional overall length of about 100 to 150 mm compensates for mechanical loads particularly well due to the corrugated tea area 6 arranged predominantly on the fluid inlet side 2.
• FIG. 2 shows, partly in longitudinal axial section, a second exemplary embodiment of a honeycomb body arrangement with a cylindrical or oval honeycomb body 1.
• a smooth tea area 7 is first arranged on the fluid inlet side 2, followed by a corrugated tea area 6 and another smooth tea area 7.
• the first smooth tea area 7 is significantly longer than the second one, which has only a length of about 5 mm.
• the corrugated tea area 6, which is predominantly arranged on the fluid outlet side 3, is soldered to the outer casing tube 5 over a length of 3 tube corrugations on the fluid outlet side axially; the honeycomb body 1 is on the fluid inlet side 2 axially partially 9 over a length of z.
• honeycomb body arrangement with a honeycomb body 1 of a conventional overall length of about 100 to 150 mm supports the rapid response of the catalyst carrier body when it is exposed to exhaust gas owing to the longer first smooth smooth tea area 7, which is thermally insulated from the outer casing tube 5 Motors in the cold start phase.
• Fig. 3 shows, partially in section, a third embodiment of a honeycomb body arrangement with a honeycomb body 1.
• a smooth tea area 7 is first arranged, which is a corrugated tea area 6, a second smooth tea area 7, a second blown tea area 6 and finally follow a third smooth tea area 6.
• the fluid inlet and fluid outlet side smooth tea areas 7 each have a length of about 5 mm and are thus significantly shorter than the central, axially-centrally arranged smooth tea area 7.
• the honeycomb body 1 is axially-partially 9 over a length of 25 mm with the long, axially central spaded tea area 7 soldered; the fluid inlet and outlet corrugated tea areas 6 arranged on the step side are axially-partially 8 each over a length of z. B. three hose corrugations soldered to the outer jacket tube 5.
• Such a honeycomb body arrangement with two corrugated partial areas 6 arranged on the fluid inlet side 2 and fluid outlet side 3 compensate mechanical loads particularly well, in particular for honeycomb bodies 1 with a greater overall length of more than 150 mm.
• FIG. 4 shows, partly in longitudinal axial section, a fourth exemplary embodiment of a honeycomb body arrangement with a cylindrical honeycomb body 1.
• a smooth tea area 7, which is followed by a corrugated tea area 6 and another smooth tea area 7, is first arranged on the entry side 2.
• the fluid inlet and fluid outlet side smooth tea areas 7 are significantly longer than the corresponding smooth partial areas 7 according to FIG. 3.
• the honeycomb body 1 is axially partially on the fluid inlet and fluid outlet side 9 over a length of z. B. 15 mm soldered to the dew areas 7; the axially-centrally arranged corrugated tea area 6 is axially partially 8 over a length of z. B. three hose lines with the outer jacket tube 5 soldered.
• Such a honeycomb body arrangement with a honeycomb body 1 also of a greater length of more than 150 mm compensates for mechanical loads particularly well on the one hand due to the axially-centrally arranged corrugated tea area 6 and on the other hand supports an asaldic restart of the catalyst due to the longer, thermally insulated, smooth tea area 7 on the fluid inlet side - Carrier bodies.
• FIG. 5 shows, partly in section, an embodiment of a honeycomb body arrangement as in FIG. 4, but for a conical honeycomb body.
• conical honeycomb bodies 1 enables the construction of relatively compact exhaust gas cleaning systems with very good flow distribution and particularly good cold start behavior while maintaining the advantages of the invention shown.
• the tube curvatures of the corrugated tea areas 6, viewed over their longitudinal axial section have flank areas of great steepness, in particular even an omega shape.
• FIGS. 6 and 7 show sections of alternative hose corrugations with flattened, in particular trapezoidal, flank areas, which in the axial part 8 area of the soldering to the outer casing tube 5 have the advantage of a more permanent joining technology connection than in the case of omega-shaped hose incisions.
• the present invention enables the manufacture of honeycomb body assemblies that are safe in terms of production technology and can withstand particularly high loads and exhibit good cold start behavior in the exhaust gas purification system of a motor vehicle.

Landscapes

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

Priority Applications (4)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=7870063

Family Applications (1)

Country Status (7)

Families Citing this family (26)

Citations (5)

Family Cites Families (17)

• 1998
  • 1998-06-05 DE DE19825230A patent/DE19825230A1/de not_active Withdrawn
• 1999
  • 1999-05-28 CN CN99807055A patent/CN1122753C/zh not_active Expired - Fee Related
  • 1999-05-28 ES ES99927789T patent/ES2177287T3/es not_active Expired - Lifetime
  • 1999-05-28 EP EP99927789A patent/EP1084333B1/de not_active Expired - Lifetime
  • 1999-05-28 JP JP2000553709A patent/JP2002517670A/ja active Pending
  • 1999-05-28 WO PCT/EP1999/003711 patent/WO1999064731A1/de not_active Ceased
  • 1999-05-28 DE DE59901307T patent/DE59901307D1/de not_active Expired - Fee Related
• 2000
  • 2000-12-05 US US09/730,267 patent/US6368726B1/en not_active Expired - Fee Related

Patent Citations (5)

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