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
• • 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]
• • 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24149—Honeycomb-like
• • 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24174—Structurally defined web or sheet [e.g., overall dimension, etc.] including sheet or component perpendicular to plane of web or sheet
• • 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness

Definitions

• Honeycomb body in particular with S-shaped, partially reinforced sheet metal layers
• the present invention relates to a metallic honeycomb body, in particular a catalyst carrier body for internal combustion engines, according to the preamble of claim 1.
• honeycomb bodies are known from EP-A-0 245 737. Structured sheets that are intertwined in opposite directions can be used to fill a large number of different cross-sectional shapes, resulting in bodies that are very resistant to thermal alternating loads.
• the typical shape of the sheets, which resembles an S, is relatively elastic and makes it possible to connect all sheets at their ends with a casing tube, which has considerable mechanical advantages over spirally wound honeycomb bodies.
• the object of the present invention is to provide a honeycomb body, in particular a catalyst carrier body, which has a fastening on the jacket tube that is more resistant to tearing.
• the stack of mutually intertwined, at least partially structured metal sheets on its upper side and / or its lower side and / or in its interior has individual layers of greater thickness, either by using thicker metal sheets or by having several thin sheets of the same structure close together.
• the effect of these thicker layers of sheet metal is that, owing to their greater mechanical strength, they cannot be easily torn off on the tubular casing.
• these thicker layers can also hold on to the sheet metal layers adjacent to them, so that they either do not tear off on the casing tube, or at least are held in place despite the tear-off due to the thick layer. If the individual sheet layers of the
• Stacks are soldered to one another, preferably on one or both end faces, so the thicker layers conduct the tensile forces that arise in the outer region near the casing tube into the interior of the honeycomb body, so that the forces are distributed over significantly more connection points, thereby increasing the service life of the Body is increased significantly.
• the middle sheet layer of the stack should have a greater thickness than the other layers. This is not a problem in terms of production technology, in particular since the greater thickness is achieved by stacking many thin sheets together.
• the reinforcement of the middle sheet layer leads to a symmetrical structure of the resulting body, which is also advantageous for the distribution of forces.
• the proposed embodiment according to claim 4 offers particular advantages. Since oval or elliptical shapes are sensitive to deformations with changing internal pressure, an approximately S-shaped connecting bridge between the straight or weakly rounded areas of the casing tube is a measure which is particularly advantageous for the stability of this shape. Here, too, individual thicker layers distribute the forces occurring outside in the vicinity of the jacket tube much better evenly into the interior of the catalyst carrier body, which u. a. also the noise development is reduced.
• the thicker sheet layers should be smooth sheet layers. While many different sheet metal structures are known from the prior art for the formation of passages which are permeable to exhaust gas, the most frequently used type of structure is an alternating layering of smooth and corrugated sheet metal layers. In this case, it makes sense to use some of the slickest ones
• the thicker sheet layers should not extend over the entire width of the stack, ie not over the entire axial length of the honeycomb body, but can consist of one or more strips lying one behind the other in the axial direction. In particular, it is advantageous if such strips are only inserted on one or both end faces. On the one hand, this leads to a material saving, but on the other hand, it contributes to the various fastening options and customary soldering processes, e.g. B. bill for catalyst carrier body. In the case of catalyst support bodies which are only soldered on the end face, it is sufficient, for example, for the desired success to provide thicker sheet metal layers only on the end face, as is proposed in claim 7. In principle, however, any other positions of the thicker sheet layers are within the
• Catalyst carrier body possible, in particular depending on the size of the soldering areas between the casing tube and the sheet metal layers.
• an end-face high-temperature soldering is also used for these special honeycomb bodies, which preferably extends to a depth of a few millimeters.
• FIG. 1 shows the structure of a sheet metal stack as it is suitable for producing a honeycomb body which is round in this case
• FIG. 2 shows a honeycomb body made from the stack according to FIG the front view of a honeycomb body according to the invention with an oval cross section.
• Figure 1 shows a stack of alternately layered smooth 1 and corrugated 2 sheets, as it is suitable for producing a honeycomb body according to the invention.
• the stack 3 has a length L, a height H and a width B.
• the width B corresponds to the later axial expansion of the honeycomb body, the product of the length and height corresponds to the later cross-sectional area of the finished honeycomb body.
• Such a stack 3 can be devoured in opposite directions around two fixed points 5 and 6, as is already known from the prior art.
• Sheet metal layers are connected entirely or in parts with a jacket tube, in particular by high-temperature soldering.
• the sheet metal layers 1, 2 are also soldered to one another at high temperatures in the finished honeycomb body, in particular in the region of the end faces.
• some of the sheet layers are thicker than the rest of the stack 3.
• the top sheet metal layer 8, the bottom sheet metal layer 9 and the middle sheet metal layer 10 are thicker, either by using thicker sheets or by stacking several smooth sheets on top of one another.
• These thicker sheet metal layers can extend all or in part over the entire width B of the stack, but they can also, as indicated in the present case, only be formed as strips 8a, 8b or 9a, 9b or 10a, 10b, which are extend only over part b of the width B of the stack.
• FIG. 2 shows a honeycomb body as it arises after the stack from FIG. 1 has been devoured in opposite directions.
• the intertwined sheet metal layers 1, 2 are arranged in a casing tube 7 and connected to it at least in parts, in particular by high-temperature soldering.
• the thicker sheet metal layers 8, 9, 10, which are also connected by joining technology to the casing tube 7, can transmit forces from the outer region into the interior in this form of honeycomb bodies.
• these thicker sheet layers 8, 9, 10 do not tear off easily from the casing tube 7 and thereby stabilize the neighboring layers.
• the originally top and bottom layers of the stack are bent around the fixed points 5 and 6 and thus have a double thickness.
• the thicker sheet layers 8, 9, 10 do not need to extend over the entire axial extent of the honeycomb body, indicated by the arrow.
• the thicker sheet layers 8, 9, 10 can consist, for example, of two partial strips 9a, 9b and 10a, 10b of width b arranged on the end face. It is important that the partial strips are connected to the casing tube 7 by joining technology and preferably also have connections to their neighboring positions. It is particularly favorable if the sheet metal layers 1, 2, 8, 9, 10 are soldered to each other a few millimeters deep on the end face.
• FIG. 3 A further exemplary embodiment, for which the application of the present invention is particularly suitable, is shown in FIG. 3. It is a honeycomb body with an elliptical cross section.
• the individual structured sheet metal layers are only indicated by dashed lines. Some of the sheet layers, namely the top 38, bottom 39 and middle 40 layers of the original stack from which this body is made, are thicker than the other layers. Through their firm connection to the casing tube 37, they stabilize the entire body and also prevent deformation of the casing tube 37 due to high internal pressure within certain limits.
• Such an elliptical honeycomb body like many other shapes, can also be produced from a stack of structured metal sheets by intertwining the ends in opposite directions around the fixed points 35, 36. Only that
• the location of the fixed points and the shape of the starting stack are different than in the production of honeycomb bodies with a round cross-section.
• a honeycomb body with a so-called oval cross section is shown in FIG.
• Such bodies can also be produced by intertwining a stack of structured sheets 1, 2 around fixed points 45, 46.
• the top 48, bottom 49 and middle 50 layers are reinforced.
• the present invention is particularly suitable for catalyst support bodies with oval or elliptical ones
• Cross section which are to be used as the main catalyst in motor vehicles.
• Typical sheet thicknesses are z.

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)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Exhaust Gas After Treatment (AREA)
• Catalysts (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6820585

Family Applications (1)

Country Status (8)

Cited By (18)

Families Citing this family (20)

Citations (1)

Family Cites Families (3)

• 1988
  • 1988-02-11 DE DE8801788U patent/DE8801788U1/de not_active Expired
  • 1988-12-19 DE DE8989900246T patent/DE3882054D1/de not_active Expired - Lifetime
  • 1988-12-19 WO PCT/EP1988/001178 patent/WO1989007488A1/de active IP Right Grant
  • 1988-12-19 JP JP1500348A patent/JPH03502544A/ja active Granted
  • 1988-12-19 EP EP89900246A patent/EP0436533B1/de not_active Expired - Lifetime
  • 1988-12-19 BR BR888807886A patent/BR8807886A/pt not_active IP Right Cessation
• 1989
  • 1989-02-09 MX MX1486389A patent/MX171154B/es unknown
• 1990
  • 1990-08-08 US US07/564,384 patent/US5102743A/en not_active Expired - Lifetime
  • 1990-08-10 RU SU904830671A patent/RU1838640C/ru active

Patent Citations (1)

Also Published As

Similar Documents

Legal Events