WO2013008786A1 - Structure en nid d'abeille - Google Patents

Structure en nid d'abeille Download PDF

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Publication number
WO2013008786A1
WO2013008786A1 PCT/JP2012/067491 JP2012067491W WO2013008786A1 WO 2013008786 A1 WO2013008786 A1 WO 2013008786A1 JP 2012067491 W JP2012067491 W JP 2012067491W WO 2013008786 A1 WO2013008786 A1 WO 2013008786A1
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WIPO (PCT)
Prior art keywords
side wall
core
shell
honeycomb structure
partition
Prior art date
Application number
PCT/JP2012/067491
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English (en)
Japanese (ja)
Inventor
照夫 小森
朝 吉野
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住友化学株式会社
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Publication of WO2013008786A1 publication Critical patent/WO2013008786A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2484—Cell density, area or aspect ratio
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/247—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2474—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the walls along the length of the honeycomb
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2482—Thickness, height, width, length or diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2486—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure characterised by the shapes or configurations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2498—The honeycomb filter being defined by mathematical relationships
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
    • 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
    • F01N2330/06—Ceramic, e.g. 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
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/34—Honeycomb supports characterised by their structural details with flow channels of polygonal cross section
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a honeycomb structure used as a filter for purifying gas.
  • Honeycomb structures are widely known as filters for purifying gas discharged from an internal combustion engine, such as for diesel particulate filters.
  • the honeycomb structure has a structure in which each cell is arranged so that at least one cell whose one end is sealed with a sealing material is adjacent to the cell whose one end is sealed with a sealing material. (For example, refer to Patent Document 1).
  • the cross-sectional shape of the cell in the vicinity of the side surface of the structure is randomly cut out. It becomes. Therefore, there is a possibility that a portion where the strength against the external pressure is reduced is generated in the vicinity of the side surface of the honeycomb structure.
  • an object of the present invention is to provide a honeycomb structure with improved strength against external pressure.
  • a honeycomb structure is a honeycomb structure used as a filter for purifying gas, and surrounds a core portion in which a plurality of internal cells having a polygonal cross-sectional shape are formed, and the core portion.
  • a cylindrical shell portion, the core portion includes a core partition wall that partitions each of the internal cells, and the shell portion includes a cylindrical side wall that surrounds the core portion with a gap between the core portion and the side wall.
  • a plurality of first shell partition walls disposed so as to surround the core portion, the first shell partition walls facing the side wall and connected to be concave with respect to the side wall Between the first corner of the core partition wall and the side wall.
  • first shell partition walls are disposed between the core portion and the side wall so as to surround the core portion. Moreover, each of the first shell partition walls is spanned between the first corner portion of the pair of core partition walls facing the side wall and connected to be concave with respect to the side wall, and the side wall. Other core partition walls are also connected to the first corner from the inside of the pair of core partition walls so as to partition internal cells inside the pair of core partition walls. For this reason, the external pressure which acted on the side wall is transmitted to the other core partition connected to the first corner to which the first shell partition is connected via the first shell partition in the vicinity of the external pressure application point.
  • the external pressure transmitted to the other core partition is transmitted to another core partition connected to the core partition from the inside.
  • the external pressure applied to the side wall is sequentially transmitted to the core partition walls that are connected to each other and dispersed. Therefore, this honeycomb structure has improved strength against external pressure.
  • first shell partition wall may be connected to the side wall so as to form an angle of 80 to 100 degrees with the side wall. According to this configuration, the supporting strength of the side wall by the first shell partition can be improved. Further, the first shell partition wall may be connected to the side wall so as to form an angle of about 90 degrees with the side wall. According to this structure, the support strength of the side wall by the 1st shell partition can be improved further.
  • the angle which a 1st shell partition forms with a side wall is the center surface (thickness) of the surface which touches the center plane (thickness center plane) of a side wall in the connection location of a 1st shell partition and a side wall. Is the angle formed by the center plane of
  • first shell partition may be spanned between one first corner and the side wall. According to this configuration, the structure of the shell portion can be simplified while suppressing a decrease in strength against external pressure.
  • At least one of one end and the other end of the plurality of peripheral cells partitioned by the core partition, the side wall, and the first shell partition may be sealed.
  • the honeycomb structure is arranged on the gas flow path so that the one end is on the upstream side, thereby suppressing the inflow of gas into the peripheral cell.
  • the cell portion can function as a heat insulating layer.
  • the cross-sectional area of the peripheral cell may be 40% or more of the average cross-sectional area of all the peripheral cells. According to this configuration, when the end portion of the outer peripheral cell is sealed with the sealing material, the occurrence of a sealing failure in which the end portion of the outer peripheral cell is not reliably sealed due to the small cross-sectional area of the outer peripheral cell is prevented. be able to.
  • the structure of the core part may be an asymmetric cell structure.
  • the filtration area per unit volume of the filter can be increased as compared with, for example, a symmetric cell structure, so that it is possible to reduce the pressure loss caused by the filter, and thus the honeycomb structure. It is possible to improve the fuel consumption of the internal combustion engine to which is applied.
  • the first shell partition includes a flat first connecting portion connected to the side wall, and the adjacent first connecting portions are adjacent to each other at a location where the interval between the adjacent first connecting portions is greater than the length of the longest diagonal line in the polygon.
  • a second shell partition is disposed between the connecting portions, and the second shell partition is formed between a second corner of a pair of core partitions connected to face the side wall and protrude from the side wall, and the side wall.
  • the distance between the adjacent first connection portion and the second connection portion is equal to or less than the length of the longest diagonal line in the polygon. It may be.
  • the longest diagonal line means a diagonal line having the longest length among polygonal diagonal lines (line segments connecting two vertices that are not adjacent to each other).
  • a honeycomb structure with improved strength against external pressure can be provided.
  • FIG. 1 is a perspective view of a honeycomb structure according to an embodiment of the present invention.
  • FIG. 2 is a partially enlarged view of a cross section taken along line II-II in FIG. 1.
  • FIG. 2 is a partially enlarged view of one end surface of the honeycomb structure of FIG. 1.
  • FIG. 2 is a partially enlarged view of the other end surface of the honeycomb structure of FIG. 1.
  • FIG. 1 is a perspective view of a honeycomb structure according to an embodiment of the present invention.
  • the honeycomb structure 1 includes a cylindrical core portion 2 (a portion inside a two-dot chain line in FIG. 1) and a cylindrical shell portion 3 (in FIG. 1) surrounding the core portion 2. A portion outside the two-dot chain line).
  • the core portion 2 and the shell portion 3 are integrally formed with the same line as the center line CL.
  • the material of the core portion 2 and the shell portion 3 passes through the gas while capturing fine particles (soot, etc.) in the gas discharged from the internal combustion engine, such as a porous (for example, average pore diameter of 20 ⁇ m or less) ceramic material. It is something to be made.
  • each internal cell 4 extends so as to be substantially parallel to the center line CL.
  • the height of the honeycomb structure 1 (that is, the distance between the one end face 1a and the other end face 1b) can be set to 40 to 350 mm, for example.
  • the outer diameter of the honeycomb structure 1 can be set to 100 to 320 mm, for example.
  • the opening area (cross-sectional area) of each internal cell 4 can be, for example, about 0.6 to 7.0 mm 2 (more preferably, about 0.8 to 6.0 mm 2 ).
  • the distance (so-called cell pitch) between the center lines of the adjacent internal cells 4 and 4 can be set to 1.1 to 2.8 mm, for example.
  • the ceramic material used for the core portion 2 and the shell portion 3 examples include alumina, silica, mullite, cordierite, glass, oxides such as aluminum titanate, silicon carbide, silicon nitride, and metal.
  • the aluminum titanate can further contain magnesium and / or silicon.
  • the core part 2 and the shell part 3 can be obtained by baking the green molded object (unfired molded object) used as the ceramic material mentioned above.
  • a green molded object contains the inorganic compound source powder which is a ceramic raw material, organic binders, such as methylcellulose, and the additive added as needed.
  • the inorganic compound source powder includes an aluminum source powder such as ⁇ -alumina powder, and a titanium source powder such as anatase-type or rutile-type titania powder.
  • magnesium source powder such as magnesia powder and magnesia spinel powder, and / or silicon source powder such as silicon oxide powder and glass frit can be included.
  • organic binder examples include celluloses such as methylcellulose, carboxymethylcellulose, hydroxyalkylmethylcellulose, and sodium carboxymethylcellulose; alcohols such as polyvinyl alcohol; and lignin sulfonate.
  • additives include a pore-forming agent, a lubricant, a plasticizer, a dispersant, and a solvent.
  • Examples of the pore-forming agent include carbon materials such as graphite; resins such as polyethylene, polypropylene and polymethyl methacrylate; plant materials such as starch, nut shells, walnut shells and corn; ice; and dry ice.
  • Lubricants and plasticizers include alcohols such as glycerin; higher fatty acids such as caprylic acid, lauric acid, palmitic acid, arachidic acid, oleic acid and stearic acid; stearic acid metal salts such as aluminum stearate, polyoxyalkylene alkyl And ether (POAAE).
  • alcohols such as glycerin
  • higher fatty acids such as caprylic acid, lauric acid, palmitic acid, arachidic acid, oleic acid and stearic acid
  • stearic acid metal salts such as aluminum stearate, polyoxyalkylene alkyl And ether (POAAE).
  • dispersant examples include inorganic acids such as nitric acid, hydrochloric acid and sulfuric acid; organic acids such as oxalic acid, citric acid, acetic acid, malic acid and lactic acid; alcohols such as methanol, ethanol and propanol; ammonium polycarboxylate Surfactant etc. are mentioned.
  • solvent for example, alcohols such as methanol, ethanol, butanol and propanol; glycols such as propylene glycol, polypropylene glycol and ethylene glycol; and water can be used.
  • FIG. 2 is a partially enlarged view of a cross section taken along line II-II in FIG.
  • the core portion 2 has a core partition wall 5 that partitions each of the plurality of internal cells 4.
  • Each internal cell 4 has a hexagonal cross-sectional shape (a cross-sectional shape perpendicular to the direction in which the internal cell 4 extends).
  • the internal cells 4 are arranged in a hexagonal close-packed arrangement with adjacent internal cells 4 and 4 partitioned by the core partition wall 5.
  • the internal cell 4 includes an internal cell 4a having a regular hexagonal cross-sectional shape, a regular hexagon (for example, a long side having the same length as one side of the internal cell 4a, and a longer side than the one side of the internal cell 4a). And an internal cell 4b having a hexagonal cross section having a short short side. That is, the structure of the core portion 2 is an asymmetric cell structure including a plurality of types of internal cells 4 having different cross-sectional shapes. In the core part 2, six internal cells 4b are adjacent to one internal cell 4a, and the long side of the cross-sectional shape of each internal cell 4b faces each side of the cross-sectional shape of the internal cell 4a. It is not limited to this.
  • the internal cells 4a and 4b may be arranged so that at least one of the internal cell 4a and the internal cell 4b is adjacent to the other.
  • Fig. 3 is a partially enlarged view of one end face 1a of the honeycomb structure 1
  • Fig. 4 is a partially enlarged view of the other end face 1b of the honeycomb structure 1.
  • FIG. 3 at one end face 1a of the honeycomb structure 1, one end of the internal cell 4a is sealed with a sealing material, and the internal cell 4b is opened.
  • FIG. 4 at the other end face 1b of the honeycomb structure 1, the other end of the internal cell 4b is sealed with a sealing material, and the internal cell 4a is opened.
  • the material of the sealing material may be a material that allows the gas to pass while capturing fine particles (such as soot) in the gas discharged from the internal combustion engine, or may be a material that does not allow the gas to pass.
  • the material of the sealing material may be the same material as the core part 2 and the shell part 3, or may be a different material.
  • the shell portion 3 (portion outside the two-dot chain line in FIGS. 2 to 4) exposes the opening of the internal cell 4b on the one end face 1a of the honeycomb structure 1,
  • the core portion 2 (the portion inside the two-dot chain line in FIGS. 2 to 4) is surrounded so that the opening of the internal cell 4a is exposed at the other end face 1b of the honeycomb structure 1.
  • the shell portion 3 includes a cylindrical side wall 6 that surrounds the core portion 2 via a gap, and a plurality of shell partition walls 7 that are disposed between the core portion 2 and the side wall 6 so as to surround the core portion 2. ,have.
  • each shell partition wall 7 is formed by a pair of core partition walls 5, 5 that are opposed to the sidewall 6 and connected to be recessed with respect to the sidewall 6. In between.
  • the shell partition wall 7 forms an acute angle (an angle smaller than 90 degrees) with each of the pair of core partition walls 5 and 5 gathering at the corner 5a to which the shell partition wall 7 is connected. That is, the center plane (thickness center plane) of the shell partition wall 7 is the center plane (thickness center plane) of each of the pair of core partition walls 5 and 5 gathering at the corner 5a to which the shell partition wall 7 is connected. And makes an acute angle.
  • the shell partition wall 7 is connected to the side wall 6 so as to form an angle of about 90 degrees with the side wall 6 (that is, substantially orthogonal to the side wall 6). That is, the center plane (thickness center plane) of the shell partition wall 7 is approximately 90 degrees with respect to the surface in contact with the center plane (thickness center plane) of the side wall 6 at the connection portion between the shell partition wall 7 and the sidewall 6. The angle is made.
  • the shell partition 7 includes a flat connection portion 7 a connected to the side wall 6.
  • a distance D1 between adjacent connection portions 7a and 7a in the circumferential direction is larger than the length L of the longest diagonal line in the regular hexagon that is the cross-sectional shape of the internal cell 4a (that is, three diagonal lines passing through the center of the regular hexagon).
  • the shell partition wall 9 is arranged between the adjacent shell partition walls 7 and 7.
  • the shell partition wall 9 is stretched between the side wall 6 and the corner portion 5 b of the pair of core partition walls 5, 5 facing the side wall 6 and connected to be convex with respect to the side wall 6.
  • only one shell partition wall 9 is spanned between one corner 5 b and the side wall 6.
  • the shell partition wall 9 is connected to the side wall 6 so as to form an angle of about 90 degrees with the side wall 6 (that is, substantially perpendicular to the side wall 6). That is, the center plane (thickness center plane) of the shell partition wall 9 is approximately 90 degrees with respect to the surface in contact with the center plane (thickness center plane) of the side wall 6 at the connection portion between the shell partition wall 9 and the sidewall 6. The angle is made.
  • the shell partition wall 9 includes a flat connection portion 9 a connected to the side wall 6, and the distance D ⁇ b> 2 between the connection portion 7 a and the connection portion 9 a adjacent in the circumferential direction is longer than the length L. Is also getting smaller.
  • a plurality of peripheral cells 8 are formed in the shell portion 3 by being partitioned by the core partition wall 5, the side wall 6, and the shell partition walls 7 and 9, and the cross-sectional area of each peripheral cell 8 is that of all the peripheral cells 8. It is 40% or more of the average cross-sectional area.
  • the honeycomb structure 1 configured as described above is used as a filter for purifying gas. That is, the honeycomb structure 1 is discharged from the internal combustion engine so that the one end face 1a is on the upstream side and the other end face 1b is on the downstream side in a state where the honeycomb structure 1 is wrapped in a heat insulating material and further housed in a metal case. It is arranged on the gas flow path. And the gas discharged
  • the gas flowing into each cell 4b, 8b flows into each cell 4a, 8a via the core partition wall 5 and the shell partition wall 7 because the other end portions of the inner cell 4b and the outer peripheral cell 8b are sealed.
  • the gas passing through the core partition wall 5 and the shell partition wall 7 fine particles (soot, etc.) in the gas are captured, and the gas flowing into each cell 4a, 8a passes through the openings of the internal cell 4a and the outer peripheral cell 8a. And flows out of the honeycomb structure 1.
  • the purified gas is discharged from the other end face 1 b side of the honeycomb structure 1.
  • each of the shell partition walls 7 is spanned between the side walls 6 and the corner portions 5a of the pair of core partition walls 5 and 5 that are connected to the side walls 6 so as to be concave with respect to the side walls 6.
  • Another core partition wall 5 is also connected to the corner 5a from the inside of the pair of core partition walls 5 and 5 so as to partition the internal cell 4 inside the pair of core partition walls 5 and 5.
  • the external pressure which acted on the side wall 6 is transmitted to the other core partition 5 connected to the corner 5a to which the shell partition 7 is connected via the shell partition 7 in the vicinity of the action point of the external pressure. Further, the external pressure transmitted to the other core partition wall 5 is transmitted to still another core partition wall 5 connected to the core partition wall 5 from the inside. In this way, the external pressure applied to the side wall 6 is sequentially transmitted to the core partition walls 5 that are connected to each other and dispersed. Therefore, the honeycomb structure 1 is designed to improve the strength against the external pressure.
  • the shell partition wall 7 forms an acute angle (an angle smaller than 90 degrees) with each of the pair of core partition walls 5 and 5 gathering at the corner portion 5a to which the shell partition wall 7 is connected. ing.
  • the angles formed by the shell partition 7 and each of the pair of core partitions 5 and 5 are close to each other.
  • each internal cell 4 is a regular hexagon or a regular hexagon
  • the angles formed by the other core partition walls 5 and the pair of core partition walls 5 and 5 are substantially equal to each other. For this reason, the inclination of the shell partition 7 with respect to the other core partition 5 is small, and the external pressure is more easily transmitted from the shell partition 7 to the other core partition 5.
  • the shell partition walls 7 and 9 are connected to the side wall 6 so as to form an angle of about 90 degrees with the side wall 6. Thereby, the support strength of the side wall 6 by the shell partition walls 7 and 9 is improved.
  • one end portion of the peripheral cell 8a and the other end portion of the peripheral cell 8b are sealed.
  • the side wall 6 is supported also by the one end part of the outer periphery cell 8a, and the other end part of the outer periphery cell 8b, the improvement with respect to an external pressure is further aimed at in the part.
  • each peripheral cell 8 is 40% or more of the average cross-sectional area of all the peripheral cells 8.
  • the structure of the core portion 2 has an asymmetric cell structure.
  • the filtration area per unit volume of the filter can be increased as compared with, for example, a symmetrical cell structure, so that the pressure loss due to the filter can be reduced, and the honeycomb structure 1 is applied. It is possible to improve the fuel consumption of the internal combustion engine.
  • all the intervals between the connection portions 7a and 9a of the adjacent shell partition walls 7 and 9 are equal to or less than the length L of the longest diagonal line in the regular hexagon that is the cross-sectional shape of the internal cell 4a. .
  • the strength against the external pressure is prevented from being reduced at the portion due to the increase in the interval between the adjacent shell partition walls 7 and 9.
  • the shapes and materials of the core portion and the shell portion are not limited to those described above, and various shapes and materials can be applied.
  • the cross-sectional shape of an internal cell is a polygonal shape, it is not limited to a hexagonal shape.
  • the corners of the internal cells and the corners of the core partition walls may be slightly rounded.
  • the structure of the core part 2 is not limited to the asymmetric cell structure including a plurality of types of internal cells having different cross-sectional shapes, and may be a symmetric cell structure including one type of internal cells having substantially the same cross-sectional shape. Good.
  • the shell partition wall is not limited to the case where it is connected to the side wall so as to form an angle of about 90 degrees with the side wall, but is 80 to 100 degrees (preferably 86 to 94 degrees, more preferably 87 to 93) with the side wall. It may be connected to the side wall so as to form an angle. Also in this case, the supporting strength of the side wall by the shell partition can be improved.
  • the side wall is supported by the end of the sealed peripheral cell, so that the strength against external pressure is improved at that portion. Can do.
  • the honeycomb structure is disposed on the gas flow path so that the one end of the peripheral cell is on the upstream side, so that gas flows into the peripheral cell.
  • the cell portion can function as a heat insulating layer. This makes it possible to efficiently and uniformly heat the core part surrounded by the shell part in the regeneration process of the core part for burning the captured fine particles (soot, etc.) to reduce the unburned residue of the fine particles. it can.
  • a honeycomb structure with improved strength against external pressure can be provided.
  • SYMBOLS 1 Honeycomb structure, 2 ... Core part, 3 ... Shell part, 4, 4a, 4b ... Internal cell, 5 ... Core partition, 5a, 5b ... Corner

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  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

La présente invention concerne une structure en nid d'abeille (1), utilisée en tant que filtre pour la purification d'un gaz, et comprenant une partie centrale (2) comportant plusieurs cellules intérieures (4) de section polygonale ; et une partie tubulaire extérieure (3) qui entoure la partie centrale (2). La partie centrale (2) comporte des cloisons centrales (5) qui cloisonnent chacune des cellules intérieures (4), tandis que la partie extérieure (3) comporte une paroi latérale tubulaire (6) entourant la partie centrale, un vide étant ménagé entre les deux ; et plusieurs cloisons extérieures (7) disposées entre la partie centrale (2) et la paroi latérale (6) de façon à entourer la partie centrale (2). Les cloisons extérieures (7) relient la paroi latérale (6) et les coins (5a) de paires de cloisons centrales (5,5) faisant face à la paroi latérale (6) et sont reliées de façon à former une concavité par rapport à la paroi latérale (6).
PCT/JP2012/067491 2011-07-12 2012-07-09 Structure en nid d'abeille WO2013008786A1 (fr)

Applications Claiming Priority (2)

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JP2011-154060 2011-07-12
JP2011154060A JP5851745B2 (ja) 2011-07-12 2011-07-12 ハニカム構造体

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WO2013008786A1 true WO2013008786A1 (fr) 2013-01-17

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JP (1) JP5851745B2 (fr)
WO (1) WO2013008786A1 (fr)

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DE102018214929B4 (de) 2018-09-03 2022-01-27 Vitesco Technologies GmbH Katalysator mit metallischem Wabenkörper

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62163697U (fr) * 1986-04-08 1987-10-17

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3229595B2 (ja) * 1998-12-18 2001-11-19 日本碍子株式会社 排ガス浄化装置
JP5328174B2 (ja) * 2008-02-20 2013-10-30 日本碍子株式会社 目封止ハニカム構造体

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62163697U (fr) * 1986-04-08 1987-10-17

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JP2013017966A (ja) 2013-01-31
JP5851745B2 (ja) 2016-02-03

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