WO2011034015A1 - Structure de rétention de structure de radiateur à nids d'abeille dans un dispositif de purification de gaz d'échappement - Google Patents

Structure de rétention de structure de radiateur à nids d'abeille dans un dispositif de purification de gaz d'échappement Download PDF

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Publication number
WO2011034015A1
WO2011034015A1 PCT/JP2010/065695 JP2010065695W WO2011034015A1 WO 2011034015 A1 WO2011034015 A1 WO 2011034015A1 JP 2010065695 W JP2010065695 W JP 2010065695W WO 2011034015 A1 WO2011034015 A1 WO 2011034015A1
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Prior art keywords
honeycomb structure
convex portion
metal case
holding member
coat layer
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PCT/JP2010/065695
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English (en)
Japanese (ja)
Inventor
由章 畠山
土佐　真一
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本田技研工業株式会社
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Publication of WO2011034015A1 publication Critical patent/WO2011034015A1/fr

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    • 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
    • F01N3/0211—Arrangements for mounting filtering elements in housing, e.g. with means for compensating thermal expansion or vibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/9454—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific device
    • B01J35/56—
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/87—Ceramics
    • 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
    • F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1021—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1023—Palladium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1025—Rhodium
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00793—Uses not provided for elsewhere in C04B2111/00 as filters or diaphragms
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0081—Uses not provided for elsewhere in C04B2111/00 as catalysts or catalyst carriers
    • 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
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
    • F01N2350/02—Fitting ceramic monoliths in a metallic housing
    • F01N2350/04—Fitting ceramic monoliths in a metallic housing with means compensating thermal expansion
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/02—Fitting monolithic blocks into 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/20—Methods or apparatus for fitting, inserting or repairing different elements by mechanical joints, e.g. by deforming housing, tube, baffle plate or parts thereof
    • 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 holding structure in an exhaust gas purification apparatus.
  • a DPF Diesel particulate filter
  • PM particulate matter
  • honeycomb structure As another exhaust gas purification device, a DPF (Diesel particulate filter) is known which collects particulate matter (PM) such as soot contained in exhaust gas by allowing the exhaust gas to permeate through a honeycomb structure as a filter.
  • Some DPFs have a continuous regeneration function by further supporting a catalyst such as platinum or rhodium on the honeycomb structure.
  • the honeycomb structure is made of, for example, ceramics, and a support member and a buffer member are provided between the honeycomb structure and the case in order to prevent breakage.
  • a side surface holding member (support member) for restricting the radial movement of the honeycomb structure is provided between the outer peripheral surface of the cylindrical honeycomb structure and the inner peripheral surface of the case.
  • An end holding member (buffer member) that restricts the movement of the honeycomb structure in the axial direction is attached between the peripheral edges of the upstream and downstream ends of the honeycomb structure and the holding frame provided on the inner peripheral surface of the case. ing.
  • the case expands in the axial direction of the honeycomb structure due to heat during operation of the internal combustion engine, so that a clearance is generated between the case and the honeycomb structure, and the honeycomb structure is axially moved by vibration of the internal combustion engine.
  • the end face of the honeycomb structure or the end face of the end portion holding member will be stepped and worn.
  • Patent Document 1 in order to suppress step wear, an annular groove is formed along the circumferential direction on the outer periphery of the catalyst carrier (honeycomb structure), and the catalyst container containing the catalyst carrier is provided with this An annular recess projecting into the annular groove is formed, and a buffer member is disposed between the side surface of the annular groove and the side surface of the annular recess, thereby restricting the movement of the catalyst carrier in the axial direction (manifold) Converter).
  • the honeycomb structure is a ceramic member composed of a plurality of cells such as a honeycomb shape or a monolith shape, there is a high possibility that a crack or the like is generated when the annular groove is formed. Further, when installing the buffer member in the annular groove, the buffer member has to be once widened, which makes it difficult to manufacture and damages the buffer member and the honeycomb structure.
  • the present invention has been made in view of these points.
  • the main structure is the holding by the side surface holding member wound around the outer peripheral surface of the honeycomb structure, and the exhaust efficiency is not reduced. It is an object of the present invention to provide a honeycomb structure holding structure in an exhaust gas purification apparatus that can suppress cracking and the like and can be easily manufactured.
  • the present invention is a honeycomb structure holding structure in an exhaust gas purification apparatus disposed in an exhaust passage, and has a plurality of cells and an outer peripheral surface covered with a coating layer, and the honeycomb structure.
  • a metal case held inside, and a side surface holding member interposed between the honeycomb structure and the metal case, the honeycomb structure having a plurality of cells and an outer peripheral surface of the honeycomb structure The side surface holding member disposed on the outside of the convex portion, wherein the coat layer has a convex portion formed at least partially along a circumferential direction. It is characterized by being fixed to the metal case via
  • the coat layer covering the outer peripheral surface of the honeycomb structure has the convex portions formed along the circumferential direction, and the honeycomb structure is made of metal via the side surface holding member disposed outside the convex portions. Since the position is fixed to the case, the cross-sectional area of the honeycomb structure does not decrease as in the case of forming the annular groove, and the reduction in exhaust efficiency can be suppressed. In addition, since the convex portions are formed in the coat layer, the member strength is not lowered as in the case of forming the annular groove, and cracking of the honeycomb structure can be prevented.
  • the thickness of the side surface holding member is reduced to increase the surface pressure, and the honeycomb structure is held in the axial direction and the radial direction by the side surface holding member. be able to. Therefore, conventionally, it is possible to omit the end holding member that has been installed on the peripheral edge of the upstream and downstream ends of the honeycomb structure, and it is possible to reduce the thickness of the side holding member. Mounting of the holding member is facilitated.
  • the convex portion is configured by making the coat layer thicker than other portions, and the coat layer is mainly composed of ceramics, alumina, mullite, lithium aluminum silicate, silicon carbide, silicon nitride, It is preferably made of a material containing at least one selected from the group consisting of alumina titanate and cordierite.
  • the convex portion is formed by thickly coating the coat layer, it can be handled in the coating layer manufacturing process, and the convex portion can be easily formed without complicating the manufacturing work. Can be formed.
  • the metal case is reduced in diameter by a diameter reduction process in accordance with the surface shape of the convex portion, and the side surface holding member is fixedly held at a predetermined pressure.
  • the metal case is configured so that the honeycomb structure can be held in the metal case with a predetermined surface pressure while suppressing the displacement of the side surface holding member. Can be easily processed.
  • the axial length dimension of the convex portion of the honeycomb structure is 0.3 to 1.0 times the axial length dimension of the honeycomb structure itself, and the outer diameter of the convex portion. Is preferably 1.01 to 1.2 times the outer diameter of the portion of the honeycomb structure not including the convex portion.
  • the contact area is sufficient to hold the honeycomb structure sufficiently while reducing the area of the side surface holding member, and the cell structure of the honeycomb structure is affected while holding the honeycomb structure on the side surface. Sufficient strength can be obtained.
  • the side surface holding member is formed on an outer peripheral surface of the convex portion of the honeycomb structure including the concave portion by further forming a concave portion by recessing a part of the convex portion formed by the coat layer.
  • the diameter of the metal case is reduced in accordance with the surface shape of the convex portion including the recess.
  • the metal case formed so as to enter the recess also thermally expands in the axial direction even when the metal case thermally expands in the radial direction.
  • the honeycomb structure can be reliably held by the metal case.
  • a plurality of protrusions are further formed on the surface of the protrusions formed of the coating layer at intervals in the axial direction, and the protrusions of the honeycomb structure including the plurality of protrusions are formed. It is preferable that the side surface holding member is attached to the outer peripheral surface of the portion, and the diameter of the metal case is reduced in accordance with the surface shape of the convex portion including the protruding portion.
  • the metal case fitted between the protrusions is also heated in the axial direction.
  • the metal case strongly meshes with the side surface holding member disposed on the outer peripheral surface of the protruding portion, so that vibration applied to the honeycomb structure can be suppressed and stably held.
  • the present invention provides an end holding member that restricts the movement of the honeycomb structure in the axial direction at a position facing the upstream end and the downstream end of the convex portion formed of the coat layer.
  • the metal case is reduced in diameter by spinning so as to apply a predetermined pressure in the axial direction to the upstream end and the downstream end of the end holding member.
  • the end holding member is mounted in addition to the side holding member, and these are directly fixed by the metal case, the side and end of the honeycomb structure can be held only by spinning. This makes it possible to improve workability.
  • a plurality of grooves are formed on the outer peripheral surface of the convex portion.
  • the holding by the side surface holding member wound around the outer peripheral surface of the honeycomb structure is set as the main holding, and the cracking of the honeycomb structure can be suppressed without lowering the exhaust efficiency, and the manufacturing work can be suppressed.
  • An easy carrier support structure for a catalytic converter can be provided.
  • a catalytic converter 1 to which the honeycomb structure holding structure according to the first embodiment is applied is a purification device that is installed on, for example, an exhaust path of an automobile and purifies harmful substances contained in exhaust gas. is there.
  • the catalytic converter 1 includes a catalyst carrier 2 that supports a catalyst, a metal case 3 that houses the catalyst carrier 2, and a side surface holding member 4 that is installed between the catalyst carrier 2 and the metal case 3. .
  • the catalyst carrier 2 is formed by coating alumina on the surface of a ceramic honeycomb structure formed in a cylindrical shape, for example.
  • the alumina coating layer contains a three-way catalyst such as platinum, palladium, or rhodium.
  • the catalyst carrier 2 has a plurality of cells 21 through which exhaust gas flows.
  • the cell 21 is a hollow passage and is formed, for example, in a quadrangular shape in a cross-sectional view.
  • the surface of the cell 21 is coated with the above-described three-way catalyst.
  • the cell 21 is sealed at either the inflow side or the outflow side end, and the cells 21 with the inflow side sealed and the cells 21 with the outflow side sealed are alternately arranged.
  • the catalyst carrier 2 is made of ceramics, although nitrogen oxides (NOx), hydrocarbons (HC), and carbon monoxide (CO) in the exhaust gas come into contact with the three-way catalyst to cause a redox reaction and become high temperature. Therefore, the heat resistance is high, and since the honeycomb structure is used, the contact area with the exhaust gas is wide and the purification ability is high.
  • the catalyst carrier 2 is installed on the exhaust path with the axial direction of the honeycomb structure oriented in the flow direction of the exhaust gas.
  • the cross-sectional shape of the catalyst carrier 2 is not limited to a circular shape, and may be formed in an elliptical shape or a polygonal shape.
  • a coat layer 5 is formed on the outer peripheral surface of the catalyst carrier 2.
  • the coat layer 5 is composed mainly of ceramics, and is selected from the group consisting of alumina, mullite, lithium aluminum silicate, silicon carbide (SiC), silicon nitride, alumina titanate (AT), cordierite, and the like. It is comprised with the material containing 1 type or 2 types.
  • the thickness dimension of the flat portions 5a and 5b described later of the coat layer 5 is preferably about 5 mm.
  • the coat layer 5 is formed in an annular shape along the circumferential direction of the catalyst carrier 2 at the flat portions 5 a and 5 b on the upstream side and the downstream side that are formed flat and in the center portion in the axial direction.
  • a convex portion 51 is formed by making the thickness of the coat layer 5 larger than the flat parts 5a and 5b. A method for forming the convex portion 51 will be described in detail later.
  • the convex portion 51 is formed in a mountain shape in which the central portion in the axial direction is the highest apex 52.
  • taper portions 53 and 53 that are reduced in diameter as they are separated from the top portion 52 are formed. It is preferable that a plurality of grooves 53a, 53a... Are formed on the surfaces of the tapered portions 53, 53, for example, along the circumferential direction.
  • the length L1 of the convex portion 51 in the axial direction of the catalyst carrier 2 is 0.3 to 1.0 times (30% or more and 100% or less) of the length L2 of the catalyst carrier 2 in the axial direction. preferable. If it is smaller than 0.3 times, a sufficient holding area cannot be obtained, and if it is larger than 1.0 times, the weight of the catalyst carrier 2 becomes too large, and side surface holding becomes difficult.
  • the maximum outer diameter D1 of the convex portion 51 is preferably 1.01 to 1.2 times (101% to 120%) of the outer diameter D2 of the portion not including the convex portion 51 of the catalyst carrier 2. . This is because the mass of the honeycomb structure becomes too large and is difficult to hold, and the exhaust gas purification device becomes too large, making it difficult to mount and layout the engine.
  • the metal case 3 is a metal member that houses the catalyst carrier 2 and is formed in a substantially cylindrical shape.
  • An upstream end portion 3a of the metal case 3 is connected to, for example, an exhaust manifold EX of an internal combustion engine branched into four.
  • the downstream end 3b of the metal case 3 is narrowed to a small diameter, and is connected to, for example, a silencer (not shown).
  • the metal case 3 is processed into a shape along the surface shape of the coat layer 5 by, for example, spinning.
  • the holding portion 3 c that is a portion corresponding to the convex portion 51 of the coat layer 5 swells in the annular shape along the circumferential direction and radially outwardly in a mountain shape in a cross-sectional view.
  • the upstream portion 3 d on the upstream side of the catalyst carrier 2 is narrowed to substantially the same diameter as the catalyst carrier 2. Thereby, it is possible to suppress the exhaust gas from the exhaust manifold EX from directly entering the gap between the catalyst carrier 2 and the metal case 3.
  • the side surface holding member 4 is a member that prevents the catalyst carrier 2 from moving in the axial direction and the radial direction with respect to the metal case 3, and is formed on the convex portion 51 on the outer peripheral surface of the catalyst carrier 2. Installed in the corresponding range.
  • the side surface holding member 4 also has a function of making it difficult for the heat of the catalyst carrier 2 to be transferred to the metal case 3.
  • the side surface holding member 4 is a wire mesh ring formed by forming metal fibers such as stainless steel into a cylindrical shape, and has elasticity (stretchability).
  • the inner diameter of the side surface holding member 4 is formed to be substantially the same as the outer diameter of the convex portion 51 of the catalyst carrier 2. Further, the thickness dimension of the side surface holding member 4 is preferably about 3 mm to 25 mm.
  • the material of the side surface holding member 4 is not limited to the metal fiber, and for example, one or more kinds of glass fiber, alumina fiber, carbon fiber, polyamide fiber, etc. are appropriately selected and used. Also good.
  • the side surface holding member 4 is formed in a cylindrical shape, but the present invention is not limited to this, and the side surface holding member 4 may be formed in a belt shape and wound around the convex portion 51. Further, by using a stretchable material, the side surface holding member 4 is formed in a cylindrical shape so that the inner diameter is smaller than the outer diameter of the convex portion 51 of the catalyst carrier 2, and the side surface holding member 4 is expanded to expand the catalyst carrier. 2, and the side surface holding member 4 may be fitted to the convex portion 51 exactly.
  • FIG. 3 is an explanatory diagram of a method for forming a convex portion.
  • the material M of the coat layer 5 is sprayed from the spray S while rotating the catalyst carrier 2, so that the coat layer 5 is uniformly formed on the outer peripheral surface of the catalyst carrier 2.
  • the pair of shielding plates W, W are installed in accordance with the width forming the convex portion 51, and the material M of the convex portion 51 that is the same as the coat layer 5 is sprayed between the pair of shielding plates W, W.
  • the convex part 51 will be formed in the center part of the axial direction of the coat layer 5.
  • the position of the top part 52 of the convex part 51 and the gradient of the taper part 53 can be changed by changing the interval between the shielding plates W and W and the position of the spray S.
  • the convex portions 51 formed separately from the same material are bonded and fixed with an adhesive B. May be.
  • attach the convex part 51 after dividing what was formed in the cylindrical shape by the separate part into 2 in an axial direction.
  • an extra coat layer is formed with the bit T. 5 'may be cut and the convex part 51 may be formed. Further, instead of forming the coat layer 5 thick, an unnecessary material may be adhered and cut.
  • the formation method of the convex part 51 is not restricted to these, For example, although illustration is abbreviate
  • the convex portion 51 may be integrally formed.
  • FIG. 4 is an explanatory view of a method for assembling the catalytic converter.
  • the side surface holding member 4 is fitted into the outer peripheral surface of the catalyst carrier 2, and the side surface holding member 4 is disposed at a portion corresponding to the convex portion 51 of the catalyst carrier 2.
  • the side surface holding member 4 has elasticity, the side surface holding member 4 is deformed so as to conform to the surface shape of the convex portion 51.
  • the catalyst carrier 2 and the side surface holding member 4 are inserted into the cylindrical metal case 3.
  • the metal case 3 is rotated with the catalyst carrier 2 and the side surface holding member 4 disposed therein, and the rollers R and R of the spinning machine are moved to the surface of the metal case 3.
  • the roller R is moved in the axial direction while pressing the metal case 3.
  • the diameter of the metal case 3 is reduced in accordance with the surface shape of the coat layer 5 by adjusting the distance between the rollers R and R according to the surface shape of the coat layer 5 (that is, the surface shape of the convex portion 51).
  • the holding part 3c corresponding to the convex part 51 of the coat layer 5 in the metal case 3 is in a state of bulging toward the outer side in the radial direction in a ring shape and in a cross-sectional view along the circumferential direction. Become. Therefore, the convex portion 51 of the catalyst carrier 2 is held immovably in the axial direction and the radial direction by the holding portion 3 c corresponding to the convex portion 51 of the metal case 3 via the side surface holding member 4.
  • rollers R, R of the spinning machine are applied to the upstream portion 3d of the metal case 3 on the upstream side of the catalyst carrier 2, and the metal case 3 is reduced in diameter to approximately the same diameter as the catalyst carrier 2. In this way, the spinning of the metal case 3 completes the assembly of the catalytic converter 1.
  • a convex portion 51 is formed along the circumferential direction on the coat layer 5 covering the outer peripheral surface of the catalyst carrier 2, and the catalyst carrier is interposed via the side surface holding member 4 disposed outside the convex portion 51. Since the position 2 is fixed to the metal case 3, the cross-sectional area of the catalyst carrier 2 does not decrease as in the prior art, and a decrease in exhaust efficiency can be suppressed. Moreover, since the convex part 51 is formed in the coat layer 5, a member intensity
  • the thickness of the side surface holding member 4 can be reduced to increase the surface pressure and increase the holding force. .
  • the catalyst carrier 2 can be held in the axial direction and the radial direction by the side surface holding member 4. Therefore, it is possible to omit an end holding member (not shown) that has been conventionally installed at the upstream and downstream end peripheral edges of the catalyst carrier 2 as necessary, and the thickness of the side holding member 4 can be reduced. Since the number of parts can be reduced, the number of parts can be reduced and the weight can be reduced, and the side surface holding member 4 can be easily attached.
  • the convex part 51 can be formed by thickly coating the coat layer 5, it can respond in the production process of the coat layer 5, and the convex part 51 can be easily formed without complicating the manufacturing work. be able to.
  • the catalyst carrier 2 is placed in the metal case 3 with a predetermined surface pressure while suppressing the displacement of the side surface holding member 4.
  • the metal case 3 can be easily processed so that it can be held.
  • the length L1 of the convex portion 51 in the axial direction of the catalyst carrier 2 is 0.3 to 1.0 times the axial length L2 of the catalyst carrier 2 itself. If D1 is configured to be 1.01 to 1.2 times the outer diameter D2 of the portion not including the convex portion 51 of the catalyst carrier 2, the catalyst carrier 2 is reduced while reducing the area of the side surface holding member 4. It is possible to obtain a sufficient strength that does not affect the cell 21 of the catalyst carrier 2 while having a contact area that can be sufficiently retained and holding the catalyst carrier 2 on the side surface.
  • the plurality of grooves 53a are formed in the circumferential direction on the outer peripheral surface of the convex portion 51, the contact area between the side surface holding member 4 and the convex portion 51 increases, and the frictional force increases. Therefore, the holding force of the catalyst carrier 2 by the side surface holding member 4 can be improved.
  • FIG. 5 is a cross-sectional view of a main part of the catalytic converter according to the second embodiment. Note that the arrow f in FIG. 5 indicates the flow direction of the exhaust gas.
  • the carrier holding structure of the catalytic converter 1 according to the second embodiment is different from the first embodiment described above in that an annular recess 62 is provided on the outer peripheral surface of the protrusion 61 formed in the coat layer 5. ing. That is, in the second embodiment, the holding portion 3c and the side surface holding member 4 which are portions corresponding to the convex portion 61 of the metal case 3 enter the recess 62, thereby holding the catalyst carrier 2 in the axial direction and the radial direction. is doing.
  • the recess 62 is formed in a substantially V shape in cross-sectional view, and the upstream side and the downstream side of the recess 62 relatively constitute projecting portions 63 and 63.
  • the diameter of the metal case 3 is reduced according to the surface shape of the recess 62 and the protrusions 63 and 63 by spinning. Further, the side surface holding member 4 is also deformed so as to conform to the surface shape of the recess 62 and the protrusions 63 and 63 due to the reduced diameter of the metal case 3.
  • the upstream portion 3 d on the upstream side of the catalyst carrier 2 and the downstream portion 3 e on the downstream side are reduced in diameter to approximately the same diameter as the outer diameter of the catalyst carrier 2.
  • the outer peripheral edge on the upstream side and the outer peripheral edge on the downstream side of the catalyst carrier 2 are not in contact with the metal case 3.
  • the metal case 3 and the side surface holding member 4 enter the recess 62 formed in the convex portion 61, the metal case 3 is axially aligned even when the metal case 3 is thermally expanded in the radial direction. And the inclined surface of the recess 62 (or the projecting portions 63 and 63) is pressed radially inward via the side surface holding member 4, so that the holding force of the catalyst carrier 2 by the metal case 3 is increased. The decrease can be suppressed.
  • FIG. 6 is a cross-sectional view of a main part of the catalytic converter according to the third embodiment.
  • the arrow f of FIG. 6 has shown the flow direction of waste gas.
  • the carrier holding structure of the catalytic converter 1 according to the third embodiment includes end holding members 8 and 9 that come into contact with the upstream end 72 and the downstream end 73 of the convex portion 71 formed in the coat layer 5. This is different from the first and second embodiments described above.
  • the outer peripheral surface of the convex part 71 is formed flat, and the side surface holding member 4 is installed in the circumference
  • the length dimension of the convex portion 71 in the axial direction is about 0.3 to 0.9 times the length dimension of the catalyst carrier 2 in the axial direction.
  • end holding members 8 and 9 which are wire mesh rings formed in an annular shape using a metal fiber or the like are installed facing the upstream end 72 and the downstream end 73 of the convex portion 71. .
  • the holding portion 3 c which is a portion corresponding to the convex portion 71 is reduced in diameter by spinning processing in accordance with the surface shape of the convex portion 71.
  • the catalyst carrier 2 is held by the metal case 3 so as not to move in the radial direction via the side surface holding member 4.
  • the upstream portion 3 d on the upstream side of the catalyst carrier 2 and the downstream portion 3 e on the downstream side are reduced in diameter to approximately the same diameter as the outer diameter of the catalyst carrier 2.
  • the outer peripheral edge on the upstream side and the outer peripheral edge on the downstream side of the catalyst carrier 2 are not in contact with the metal case 3.
  • maintenance part 3c and the upstream part 3d among the metal cases 3 is formed so that it may become a small diameter, so that it goes upstream.
  • the inner peripheral surface of the taper portion 3f is in contact with the upstream end of the upstream end holding member 8, and restricts the end holding member 8 and the catalyst carrier 2 from moving upstream.
  • maintenance part 3c and the downstream part 3e among the metal cases 3 is formed so that it may become a small diameter, so that it goes downstream.
  • the inner peripheral surface of the taper portion 3g is in contact with the downstream end of the downstream end holding member 9, and restricts the end holding member 9 and the catalyst carrier 2 from moving downstream.
  • the end holding members 8 and 9 are mounted in addition to the side holding member 4 and are directly fixed by the metal case 3.
  • the side and end portions of the catalyst carrier 2 can be held only by spinning, and workability is improved. Further, since the upstream end and the downstream end of the catalyst carrier 2 are not in contact with the metal case 3 and the end holding members 8 and 9, no load is applied when the catalytic converter 1 vibrates. Therefore, cracking of the catalyst carrier 2 can be prevented.
  • convex portion 51, 61, 71 is formed in a ring shape at the central portion in the axial direction of the coat layer 5 of the catalyst carrier 2, but the present invention is not limited to this.
  • the convex part 51 does not need to be annular.
  • the diameter of the metal case 3 is reduced by spinning, but the present invention is not limited to this.
  • the cylindrical metal case 3 is divided in half in the axial direction to form two halved members, which are pressed according to the surface shape of the coat layer 5 of the catalyst carrier 2.
  • the two half-shaped members may be welded to form the cylindrical metal case 3.
  • the diameter of the metal case 3 may be reduced using a split mold or an integrated mold.
  • the plurality of grooves 53a are formed along the circumferential direction on the surface of the convex portion 51.
  • the present invention is not limited to this, and for example, a granular material is applied to the surface of the tapered portion 53. It is only necessary to roughen the surface of the convex portion 51 and increase the friction with the side surface holding member 4 by a method such as spraying.
  • the catalyst carrier 2 of the catalytic converter 1 has been described as an example of the honeycomb structure in the exhaust gas purifying apparatus.
  • the present invention is not limited to this, for example, a honeycomb as a filter in a DPF. It may be a structure.
  • Catalytic converter exhaust gas purification device
  • Catalyst carrier honeycomb structure
  • Metal Case Side Surface Holding Member 5 Coat Layer 51 Projection

Abstract

La présente invention a trait à une structure de rétention d'une structure de radiateur à nids d'abeille dans un dispositif de purification de gaz d'échappement, permettant de ne pas réduire l'efficacité d'échappement tout en autorisant à une structure de radiateur à nids d'abeille d'être principalement retenue par un élément de rétention de surface latérale enroulé autour de la surface périphérique extérieure de la structure de radiateur à nids d'abeille, permettant d'éviter toute fissure de la structure de radiateur à nids d'abeille et de produire facilement la structure de rétention. La structure de rétention d'une structure de radiateur à nids d'abeille est équipée d'un support de catalyseur (2) constitué d'une structure de radiateur à nids d'abeille, d'un boîtier métallique (3) à l'intérieur duquel le support de catalyseur (2) est retenu, et d'un élément de rétention de surface latérale (4) disposé entre le support de catalyseur (2) et le boîtier métallique (3). Le support de catalyseur (2) est doté d'une pluralité de cellules (21) et d'une couche de revêtement (5) qui recouvre la surface périphérique extérieure du support de catalyseur (2). Une partie en saillie (51) est formée sur au moins une partie de la couche de revêtement (5) dans la direction circonférentielle, et le support de catalyseur (2) est placé et fixé sur le boîtier métallique (3) via l'élément de rétention de surface latérale (4) disposé à l'extérieur de la partie en saillie (51).
PCT/JP2010/065695 2009-09-15 2010-09-13 Structure de rétention de structure de radiateur à nids d'abeille dans un dispositif de purification de gaz d'échappement WO2011034015A1 (fr)

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JP2009-213168 2009-09-15

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JP2015148171A (ja) * 2014-02-05 2015-08-20 日本碍子株式会社 ハニカム構造体及び排ガス浄化装置
CN112135962A (zh) * 2018-05-18 2020-12-25 马瑞利株式会社 排气净化装置
FR3106853A1 (fr) * 2020-02-04 2021-08-06 Psa Automobiles Sa Dispositif d’echappement comprenant des bossages de maintien d’un boitier de depollution
WO2021181758A1 (fr) * 2020-03-09 2021-09-16 日本碍子株式会社 Support chauffé électriquement et dispositif d'épuration de gaz d'échappement
US11149613B2 (en) 2016-07-13 2021-10-19 Corning Incorporated Exhaust gas treatment article and methods of manufacturing same
US20230067514A1 (en) * 2019-12-11 2023-03-02 Focus Universal Inc. Activated carbon air filter

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JP2007138747A (ja) * 2005-11-15 2007-06-07 Toyota Motor Corp ハニカム構造体及び排ガス浄化装置
JP2008088952A (ja) * 2006-10-05 2008-04-17 Honda Motor Co Ltd 触媒装置

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JP2002070545A (ja) * 2000-08-25 2002-03-08 Ibiden Co Ltd セラミックハニカム構造物の収容構造
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Publication number Priority date Publication date Assignee Title
JP2015148171A (ja) * 2014-02-05 2015-08-20 日本碍子株式会社 ハニカム構造体及び排ガス浄化装置
US11149613B2 (en) 2016-07-13 2021-10-19 Corning Incorporated Exhaust gas treatment article and methods of manufacturing same
CN112135962A (zh) * 2018-05-18 2020-12-25 马瑞利株式会社 排气净化装置
US20230067514A1 (en) * 2019-12-11 2023-03-02 Focus Universal Inc. Activated carbon air filter
US11806654B2 (en) * 2019-12-11 2023-11-07 Focus Universal Inc. Activated carbon air filter
FR3106853A1 (fr) * 2020-02-04 2021-08-06 Psa Automobiles Sa Dispositif d’echappement comprenant des bossages de maintien d’un boitier de depollution
WO2021181758A1 (fr) * 2020-03-09 2021-09-16 日本碍子株式会社 Support chauffé électriquement et dispositif d'épuration de gaz d'échappement
JP7313540B2 (ja) 2020-03-09 2023-07-24 日本碍子株式会社 電気加熱式担体及び排気ガス浄化装置

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