JPH02280842A - Metal carrier for waste gas cleaning catalyst - Google Patents
Metal carrier for waste gas cleaning catalystInfo
- Publication number
- JPH02280842A JPH02280842A JP1101979A JP10197989A JPH02280842A JP H02280842 A JPH02280842 A JP H02280842A JP 1101979 A JP1101979 A JP 1101979A JP 10197989 A JP10197989 A JP 10197989A JP H02280842 A JPH02280842 A JP H02280842A
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb
- outer cylinder
- corrugated plate
- plate
- reinforcing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 title claims description 29
- 239000002184 metal Substances 0.000 title claims description 29
- 239000003054 catalyst Substances 0.000 title claims description 13
- 238000004140 cleaning Methods 0.000 title 1
- 239000002912 waste gas Substances 0.000 title 1
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 47
- 238000000746 purification Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 abstract description 5
- 241000276425 Xiphophorus maculatus Species 0.000 abstract 1
- 238000005219 brazing Methods 0.000 description 8
- 230000008602 contraction Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910019589 Cr—Fe Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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
-
- 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
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、内燃機関の排ガス浄化触媒に用いられるメタ
ル担体に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a metal carrier used in an exhaust gas purification catalyst for an internal combustion engine.
［従来の技術］
排ガス浄化触媒用メタル担体として、例えば特開昭５６
−４３７３号公報などにみられるように、第４図に示す
ような平板１０１と波板１０２とを重ねてロール状に巻
いてハニカム部１００を形成し、そのハニカム部１００
を金属製外筒２００内に収納したものが知られている。[Prior art] As a metal carrier for an exhaust gas purification catalyst, for example, JP-A-56
As seen in Japanese Patent No. 4373, a flat plate 101 and a corrugated plate 102 as shown in FIG. 4 are stacked and rolled to form a honeycomb portion 100.
It is known that the metal outer tube 200 is housed in a metal outer cylinder 200.
このメタル担体では、ハニカム部１００の平板１０１と
波板１０２、および外筒２００とハニカム部１００とは
、通常ロウ付けによって一体的に接合されている。In this metal carrier, the flat plate 101 and the corrugated plate 102 of the honeycomb part 100, and the outer cylinder 200 and the honeycomb part 100 are usually integrally joined by brazing.
このメタル担体では、ハニカム部１００のハニカム通路
表面にアルミナなどからなる触媒担持層が形成され、そ
の触媒担持層に貴金属触媒が担持されて排ガス浄化触媒
とされる。そして内燃機関の排気通路に配置され、排気
ガス中のＨＣ，Ｃｏ、ＮＯＸなどを浄化する。なお、限
られた体積中にできるだけ多くのハニカム通路の面積を
確保するのが望ましいことから、平板１０１および波板
１０２の厚さは強度を維持できる範囲でできるだけ薄く
されている。In this metal carrier, a catalyst support layer made of alumina or the like is formed on the surface of the honeycomb passages of the honeycomb portion 100, and a noble metal catalyst is supported on the catalyst support layer to serve as an exhaust gas purification catalyst. It is placed in the exhaust passage of an internal combustion engine to purify HC, Co, NOX, etc. in the exhaust gas. Note that since it is desirable to secure as much area as possible for the honeycomb passages in a limited volume, the thicknesses of the flat plate 101 and the corrugated plate 102 are made as thin as possible within a range that maintains their strength.
ところで、ハニカム部を通過する排気ガスは、ハニカム
部の外周部に比べて中心部はど流速が大きい。したがっ
てメタル担体では、高温の排気ガスとの接触および触媒
反応による発熱により、中６部はと高温で外周部はど低
温となる温度分布が生じる。このためハニカム部の中心
部はど熱による彫版および冷却時の収縮量が大きく、外
筒の彫版および収縮量が最も小さい。ここでハニカム部
を構成する平板と波板の板厚は、一般に外筒の板厚より
もかなり小さい。また、ハニカム部と外筒とは一般に材
質が異なるため、熱膨張率も異なる。By the way, the exhaust gas passing through the honeycomb part has a higher flow velocity at the center than at the outer periphery of the honeycomb part. Therefore, in the metal carrier, due to contact with high-temperature exhaust gas and heat generated by catalytic reaction, a temperature distribution occurs in which the middle portion is extremely high and the outer peripheral portion is low. Therefore, the engraving due to heat and the amount of shrinkage during cooling are large in the center of the honeycomb part, and the amount of engraving and shrinkage in the outer tube is the smallest. The thickness of the flat plate and corrugated plate constituting the honeycomb portion is generally much smaller than the thickness of the outer cylinder. Furthermore, since the honeycomb portion and the outer cylinder are generally made of different materials, their coefficients of thermal expansion are also different.
したがって彫版および収縮の最の差により発生する応力
は、第３図Ａに示すように、ハニカム部と外筒の境界部
分に集中する。しかしながらハニカム部と外筒の境界部
分では、ハニカム部の波板の剛性が小さいため、第５図
に示すように外筒２００と接合されている頂部の両側の
部分で波板１０２が破断する場合があった。Therefore, the stress generated by the greatest difference between engraving and shrinkage is concentrated at the boundary between the honeycomb portion and the outer cylinder, as shown in FIG. 3A. However, since the rigidity of the corrugated sheet of the honeycomb portion is low at the boundary between the honeycomb portion and the outer tube, the corrugated sheet 102 may break at the portions on both sides of the top where it is joined to the outer tube 200, as shown in FIG. was there.
また、冷熱耐久試験を長時間行なった場合にも、最外周
の波板の部分で破断が生じる場合があった。Furthermore, even when a thermal durability test was conducted for a long time, breakage sometimes occurred at the outermost corrugated plate portion.
すなわち加熱時には熱膨張率の違いにより、ハニカム部
と外筒との彫版量に差が生じる。一般にハニカム部の方
が大きく彫版するが、最外周の波板の彫版は外筒で規制
されるため、最外周の波板に塑性変形が生じる場合があ
る。特に高温の状態では塑性変形が生じやすい。そして
メタル担体が冷却されると、ハニカム部は外筒に比べて
一般に大きく収縮する。したがって彫版、収縮の繰返し
により、ハニカム部の最外周の波板には金属疲労が生じ
、最終的には第５図に示すのと同じ部分で破断が生じる
場合があった。さらに、メタル担体製造時のロウ付けの
際にはメタル担体は１２００’Ｃもの高温となり、ハニ
カム部と外筒との彫版の差が一層生じやすく、上述と同
様にハニカム部の最外周波板に塑性変形が生じ、冷却時
に外筒と接合された波板頂部の両側の部分が破断する場
合があった。That is, during heating, there is a difference in the amount of engraving between the honeycomb part and the outer cylinder due to the difference in coefficient of thermal expansion. Generally, the engraving is larger on the honeycomb part, but since the engraving on the outermost corrugated sheet is restricted by the outer cylinder, plastic deformation may occur in the outermost corrugated sheet. Plastic deformation is particularly likely to occur at high temperatures. When the metal carrier is cooled, the honeycomb portion generally contracts more than the outer cylinder. Therefore, due to repeated engraving and shrinkage, metal fatigue occurs in the outermost corrugated plate of the honeycomb portion, and eventually breakage may occur at the same portion as shown in FIG. 5. Furthermore, during brazing during the manufacturing of the metal carrier, the metal carrier reaches a high temperature of 1200'C, which makes it even more likely that the difference in engraving between the honeycomb part and the outer cylinder will occur. Plastic deformation occurred, and the parts on both sides of the top of the corrugated plate joined to the outer cylinder sometimes broke during cooling.
［発明が解決しようとする課題］
本発明は上記した事情に鑑みてなされたものであり、ハ
ニカム部と外筒との間の温度分布の違いおよび熱膨張率
の違いから生じる応力の集中を緩和して、ハニカム部の
破断を防止することを目的とする。[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned circumstances, and aims to alleviate the concentration of stress caused by the difference in temperature distribution and the difference in coefficient of thermal expansion between the honeycomb part and the outer cylinder. The purpose is to prevent the honeycomb portion from breaking.
［課題を解決するための手段］
本発明の排ガス浄化触媒用メタル担体は、平板と波板と
を重ねてロール状に巻いて形成されたハニカム部と、ハ
ニカム部が収納される外筒とよりなるメタル担体におい
て、
ハニカム部の外周表面と外筒の内周表面との間には、ハ
ニカム部の外周表面を少なくとも一周し平板および波板
の板厚より厚く外筒の板厚より薄い板厚の補強波板が介
在していることを特徴とする。[Means for Solving the Problems] The metal carrier for an exhaust gas purification catalyst of the present invention includes a honeycomb portion formed by stacking a flat plate and a corrugated plate and winding them into a roll, and an outer cylinder in which the honeycomb portion is housed. In the metal carrier, between the outer circumferential surface of the honeycomb part and the inner circumferential surface of the outer cylinder, there is a plate having a thickness that goes around the outer circumferential surface of the honeycomb part at least once and is thicker than the plate thickness of the flat plate and corrugated plate and thinner than the plate thickness of the outer cylinder. It is characterized by the presence of a reinforcing corrugated plate.
ハニカム部は、平板と波板とを重ねた状態でロール状に
巻いて形成されている。波板は、通常平板を波形状に曲
折して形成され、通常平板と同材質で同一板厚を有して
いる。この平板および波板は、従来と同様に例えばＡＱ
−Ｃｒ−Ｆｅ合金、ステンレス鋼などから形成される。The honeycomb portion is formed by stacking a flat plate and a corrugated plate and winding them into a roll. A corrugated plate is usually formed by bending a flat plate into a wave shape, and is made of the same material and has the same thickness as the flat plate. These flat plates and corrugated plates can be used in the same way as in the past, such as AQ
- Made of Cr-Fe alloy, stainless steel, etc.
そして上記したように限られた体積中にできるだけ多く
のハニカム通路の面積を確保することが好ましいことか
ら、板厚は例えば０．０５ｍｍなど比較的薄いものが用
いられる。このハニカム部は、例えば波板の頂部にロウ
材が塗布された状態で平板と重ねてロール状に巻上げら
れて形成され、外筒に収納後加熱される。これにより平
板と波板とはロウ付けされて一体的に接合される。また
、拡散接合により一体化することもできる。As described above, since it is preferable to secure as much area as possible for the honeycomb passages in a limited volume, a relatively thin plate having a thickness of, for example, 0.05 mm is used. This honeycomb part is formed by, for example, applying a brazing material to the top of a corrugated plate, stacking it on a flat plate and rolling it up into a roll, and heating the corrugated plate after being housed in an outer cylinder. As a result, the flat plate and the corrugated plate are brazed and integrally joined. Alternatively, they can be integrated by diffusion bonding.
外筒は例えばステンレスｗＡ製など従来と同様のものを
用いることができ、その板厚は従来と同様、通常１〜２
ｍｍ程度である。The outer cylinder can be made of the same material as conventional ones, such as made of stainless steel, and its plate thickness is usually 1 to 2 mm, as in the conventional case.
It is about mm.
本発明の最大の特徴は、ハニカム部の外周表面と外筒の
内周表面との間に補強波板が介在しているところにある
。The greatest feature of the present invention is that a reinforcing corrugated plate is interposed between the outer circumferential surface of the honeycomb portion and the inner circumferential surface of the outer cylinder.
補強波板は、その板厚がハニカム部を構成する平板およ
び波板の板厚より厚くされる。例えば平板および波板の
１．１〜１０倍程度の板厚が好ましい。これにより補強
波板はハニカム部より剛性が高くなり、破断を防止する
ことができる。なお、補強波板の板厚は外筒の板厚、よ
り小さいことが必要である。外筒の板厚と同等以上とな
ると、補強波板の剛性が高くなり過ぎて変形が困難とな
り、ハニカム部に発生した応力を吸収するのが困難とな
る。The thickness of the reinforcing corrugated sheet is greater than the thickness of the flat plate and corrugated sheet forming the honeycomb portion. For example, the plate thickness is preferably about 1.1 to 10 times that of a flat plate or a corrugated plate. As a result, the reinforcing corrugated plate has higher rigidity than the honeycomb portion, and can be prevented from breaking. Note that the thickness of the reinforcing corrugated plate needs to be smaller than the thickness of the outer cylinder. When the thickness is equal to or greater than that of the outer cylinder, the stiffness of the reinforcing corrugated plate becomes too high, making it difficult to deform and absorbing the stress generated in the honeycomb portion.
補強波板は波板形状をなしている。これにより補強波板
は、ハニカム部の膨張または収縮の力を受けて弾性変形
可能であり、ハニカム部への応力集中を緩和することが
できる。補強波板の弾性変形を容易とするために、例え
ば補強波板の波のピッチをハニカム部の波板のピッチよ
り大きくするのが好ましい。あるいは、補強波板の波の
高さをハニカム部より大きくすることも好ましい。この
ように構成することにより補強波板が弾性変形しやすく
なって、ハニカム部に発生した応力を一層吸収しやすく
なる。ざらに、補強波板にざらに小さな波を設けてもよ
い。このようにすれば、補強波板が一層弾性変形しやす
くなる。The reinforcing corrugated plate has a corrugated plate shape. Thereby, the reinforcing corrugated plate can be elastically deformed under the force of expansion or contraction of the honeycomb portion, and stress concentration on the honeycomb portion can be alleviated. In order to facilitate elastic deformation of the reinforcing corrugated sheet, it is preferable that the pitch of the corrugated sheets of the reinforcing corrugated sheet be larger than the pitch of the corrugated sheets of the honeycomb portion, for example. Alternatively, it is also preferable that the height of the waves of the reinforcing corrugated plate be larger than that of the honeycomb portion. With this configuration, the reinforcing corrugated plate becomes easier to elastically deform, and the stress generated in the honeycomb portion is more easily absorbed. Roughly, small waves may be provided on the reinforcing corrugated plate. In this way, the reinforcing corrugated plate becomes more easily elastically deformed.
また、補強波板の材質はハニカム部または外筒と同様と
することもできるが、熱膨張率が外筒とハニカム部の中
間の値となるような材質を選択することが望ましい。こ
のように構成することにより、補強波板の膨張または収
縮の量がハニカム部と外筒の中間程度となり、膨張また
は収縮の量の急変が防止される。これによりハニカム部
と補強波板との間、および補強波板と外筒との間にそれ
ぞれ発生する応力を小さくすることができる。Further, the material of the reinforcing corrugated plate may be the same as that of the honeycomb portion or the outer cylinder, but it is desirable to select a material whose coefficient of thermal expansion is intermediate between that of the outer cylinder and the honeycomb portion. With this configuration, the amount of expansion or contraction of the reinforcing corrugated plate is approximately between that of the honeycomb portion and the outer cylinder, and sudden changes in the amount of expansion or contraction are prevented. Thereby, stress generated between the honeycomb portion and the reinforcing corrugated plate and between the reinforcing corrugated plate and the outer cylinder can be reduced.
補強波板はハニカム部の外周表面を少なくとも一周する
ように形成される。その際巻き層数は、ハニカム部の外
径およびハニカム部と外筒の彫版係数の差によって最適
な層数に設定する。なお、−周以上とする場合は、補強
波板と同等の板厚の平板を介在させてもよい。The reinforcing corrugated plate is formed so as to go around the outer peripheral surface of the honeycomb portion at least once. At this time, the number of winding layers is set to the optimum number depending on the outer diameter of the honeycomb part and the difference in the engraving coefficient between the honeycomb part and the outer cylinder. In addition, when setting it as - circumference or more, you may interpose a flat plate with the same plate thickness as the reinforcing corrugated plate.
補強波板はハニカム部の波板表面に形成することもでき
るが、ハニカム部に発生する応力を充分受けるためには
、ハニカム部の平板表面に形成するのが望ましい。なお
、補強波板とハニカム部とは、一体としてもよいし別体
とすることもできる。Although the reinforcing corrugated plate can be formed on the surface of the corrugated plate of the honeycomb portion, in order to sufficiently receive the stress generated in the honeycomb portion, it is preferable to form the reinforcing corrugated plate on the flat plate surface of the honeycomb portion. Note that the reinforcing corrugated plate and the honeycomb portion may be integrated or may be separate bodies.
［作用］
本発明の排ガス浄化触媒用メタル担体では、ハニカム部
と外筒との間に平板および波板より板厚が厚い補強波板
が介在している。したがってハニカム部の膨張または収
縮の動きによる応力が最も集中する外筒との境界部分に
は補強波板が介在し、その剛性が大きいためその境界部
分における破断が阻止されている。[Function] In the metal carrier for an exhaust gas purification catalyst of the present invention, a reinforcing corrugated plate that is thicker than the flat plate and the corrugated plate is interposed between the honeycomb portion and the outer cylinder. Therefore, the reinforcing corrugated plate is interposed at the boundary with the outer cylinder where stress due to expansion or contraction of the honeycomb portion is most concentrated, and its high rigidity prevents breakage at the boundary.
また補強波板は波板形状である。したがって高温に加熱
された場合に膨張したハニカム部の力が補強波板に作用
すると、補強波板はハニカム部と外筒の間で弾性変形し
てハニカム部の変形に追従する。これによりハニカム部
に生じた応力は、ハニカム部と補強波板との接触部分と
補強波板と外筒との接触部分に分散され、ハニカム部に
作用する応力が小さくなる。また冷却時にハニカム部が
収縮すると、それに伴って補強波板も変形するためハニ
カム部に発生する応力が小さくなる。すなわち補強波板
の変形によりハニカム部と外筒との接触部への応力集中
が緩和され、ハニカム部の破断が防止されている。Further, the reinforcing corrugated plate has a corrugated plate shape. Therefore, when the force of the honeycomb portion expanded when heated to a high temperature acts on the reinforcing corrugated plate, the reinforcing corrugated plate is elastically deformed between the honeycomb portion and the outer cylinder and follows the deformation of the honeycomb portion. As a result, the stress generated in the honeycomb portion is dispersed to the contact portion between the honeycomb portion and the reinforcing corrugated plate and the contact portion between the reinforcing corrugated plate and the outer cylinder, and the stress acting on the honeycomb portion is reduced. Further, when the honeycomb portion contracts during cooling, the reinforcing corrugated plate also deforms accordingly, so that the stress generated in the honeycomb portion is reduced. That is, the stress concentration on the contact portion between the honeycomb portion and the outer cylinder is alleviated by the deformation of the reinforcing corrugated plate, and breakage of the honeycomb portion is prevented.
すなわち本発明のメタル担体によれば、ロウ付は時や冷
熱耐久試験においてもハニカム部の破断が生じることが
防止され、排ガス浄化触媒として使用時の耐久性が著し
く向上する。That is, according to the metal carrier of the present invention, breakage of the honeycomb portion is prevented even during brazing and cold durability tests, and the durability when used as an exhaust gas purification catalyst is significantly improved.
［実施例］ 以下、実施例により具体的に説明する。[Example] Hereinafter, this will be explained in detail using examples.
第１図に本発明の一実施例の排ガス浄化触媒用メタル担
体の構成を説明する斜視図を、第２図にその要部断面図
を示す。このメタル担体は、ハニカム部１と、補強波板
２と、外筒３とより構成される。FIG. 1 is a perspective view illustrating the structure of a metal carrier for an exhaust gas purification catalyst according to an embodiment of the present invention, and FIG. 2 is a sectional view of a main part thereof. This metal carrier is composed of a honeycomb portion 1, a reinforcing corrugated plate 2, and an outer cylinder 3.
ハニカム部１は、板厚０．０５ｍｍのＡ３２−Ｃｒ−Ｆ
ｅ合金製平板１０と、この平板１０を波状に曲折して形
成された波板１１とから構成されている。そして平板１
０と波板１１とを重ね、平板１０を表側にしてロール状
に巻いて形成されている。なお、波板１１の頂部と平板
１ｏとの間にはロウが介在し、平板１０と波板１１とは
ロウ付けにより一体的に接合されている。The honeycomb part 1 is A32-Cr-F with a plate thickness of 0.05 mm.
It is composed of a flat plate 10 made of e-alloy and a corrugated plate 11 formed by bending the flat plate 10 into a wave shape. and flat plate 1
0 and a corrugated sheet 11 are stacked and rolled into a roll shape with the flat sheet 10 facing up. Note that a solder is interposed between the top of the corrugated plate 11 and the flat plate 1o, and the flat plate 10 and the corrugated plate 11 are integrally joined by brazing.
補強波板２は、ＡＱ−Ｃｒ−Ｆｅ合金がら形成され、そ
の板厚は０．１ｍｍである。そして波のピッチは波板１
１より大きく、波の高さも波板１１より大きくなってい
る。この補強波板２は、ハニカム部１の外周表面に１周
を僅かに超えて巻がれ、ハニカム部１とロウ付けにより
一体的に接合されている。The reinforcing corrugated plate 2 is made of an AQ-Cr-Fe alloy and has a thickness of 0.1 mm. And the pitch of the wave is wave plate 1
1, and the height of the waves is also larger than that of the corrugated plate 11. This reinforcing corrugated plate 2 is wound around the outer peripheral surface of the honeycomb portion 1 for slightly more than one turn, and is integrally joined to the honeycomb portion 1 by brazing.
外筒３はステンレス鋼から形成され、板厚１゜５ｍｍの
円筒状をなしている。そして外筒３内に補強波板２が巻
かれたハニカム部１が収納され、外筒３と補強波板２は
ロウ付けにより一体的に接合されている。The outer cylinder 3 is made of stainless steel and has a cylindrical shape with a plate thickness of 1.5 mm. A honeycomb portion 1 with a reinforcing corrugated plate 2 wound thereon is housed in the outer cylinder 3, and the outer cylinder 3 and the reinforcing corrugated plate 2 are integrally joined by brazing.
なお、補強波板２の線彫版率は１．３５Ｘ１０−６／℃
、ハニカム部１は１５Ｘ１０−６／”Ｃ１外筒３は１２
Ｘ１０″″６／’Ｃであって、補強波板２はハニカム部
１と外筒３のほぼ中間の値を示している。In addition, the line engraving rate of the reinforcing corrugated plate 2 is 1.35X10-6/℃
, honeycomb part 1 is 15X10-6/"C1 outer cylinder 3 is 12
X10''''6/'C, and the reinforcing corrugated plate 2 has a value approximately intermediate between that of the honeycomb portion 1 and the outer cylinder 3.
本実施例のメタル担体では、ハニカム部の膨張または収
縮の動きによる応力がもつとも集中する外筒３との境界
部には、板厚が平板１０および波板１１より厚い補強波
板２が介在している。したがってその部分の剛性が大き
いので、破断が防止されている。また、補強波板２は波
板形状であり、かつ波のピッチおよび高さは波板１１よ
り大きく、しかも熱彫版率がハニカム部１と外筒３の中
間にある。したがってハニカム部１の膨張または収縮の
動きにより補強波板２は容易に弾性変形し、ハニカム部
１と外筒３との接触部への応力集中を緩和する。これに
よりハニカム部１の破断も防止されている。ちなみに本
実施例のメタル担体の、外周部分から内周に向かう膨張
または収縮の応力の分布を第３図Ｂに示す。第３図から
、本実施例のメタル担体は従来品に比べて応力の集中が
緩和されていることが明らかである。なお、補強波板２
とハニカム部１の材質を同じにしても（線膨服係数が同
じ）、波形状を変更した効果が残り、中間の線膨張係数
を用いた場合と同様の効果が確保できる。しかしその際
は、補強波板の巻き層数は、中間の線膨張係数を用いた
場合に対し１．５〜２倍程度とすることが望ましい。In the metal carrier of this embodiment, the reinforcing corrugated plate 2, which is thicker than the flat plate 10 and the corrugated plate 11, is interposed at the boundary with the outer cylinder 3, where stress due to expansion or contraction of the honeycomb portion is concentrated. ing. Therefore, since the rigidity of that part is high, breakage is prevented. Further, the reinforcing corrugated sheet 2 has a corrugated sheet shape, the pitch and height of the corrugations are larger than the corrugated sheet 11, and the thermal engraving rate is between that of the honeycomb portion 1 and the outer cylinder 3. Therefore, the reinforcing corrugated plate 2 is easily elastically deformed by the movement of expansion or contraction of the honeycomb portion 1, and the stress concentration on the contact portion between the honeycomb portion 1 and the outer cylinder 3 is alleviated. This also prevents the honeycomb portion 1 from breaking. Incidentally, FIG. 3B shows the stress distribution of expansion or contraction from the outer periphery toward the inner periphery of the metal carrier of this example. From FIG. 3, it is clear that the metal carrier of this example has less stress concentration than the conventional product. In addition, the reinforcing corrugated plate 2
Even if the material of the honeycomb portion 1 is the same (the linear expansion coefficient is the same), the effect of changing the wave shape remains, and the same effect as when using an intermediate linear expansion coefficient can be ensured. However, in that case, it is desirable that the number of winding layers of the reinforcing corrugated sheet be about 1.5 to 2 times that of the case where an intermediate coefficient of linear expansion is used.
したがって本実施例のメタル担体においては、ロウ付時
に破断が生じず製品不良率が低減される。Therefore, in the metal carrier of this embodiment, no breakage occurs during brazing, and the product defect rate is reduced.
またこのメタル担体から形成された排ガス浄化触媒にあ
っては、長期間の使用においても破断が生じず、耐久性
が向上する。Moreover, the exhaust gas purification catalyst formed from this metal carrier does not break even after long-term use, and its durability is improved.
第１図および第２図は本発明の一実施例のメタル担体に
関し、第１図はその構成を示す斜視図、第２図はその要
部断面図である。第３図はメタル担体の厚さ方向の応力
分布を示すグラフである。
第４図は従来のメタル担体の側面図、第５図は従来のメ
タル担体の破断部分を示す要部断面図である。
１・・・ハニカム部 ２・・・補強波板 ３・・・
外筒１０・・・平板 １１・・・波板
特許出願人 トヨタ自動車株式会社
代理人 弁理士 大川 宏FIGS. 1 and 2 relate to a metal carrier according to an embodiment of the present invention, with FIG. 1 being a perspective view showing its structure, and FIG. 2 being a sectional view of its essential parts. FIG. 3 is a graph showing the stress distribution in the thickness direction of the metal carrier. FIG. 4 is a side view of a conventional metal carrier, and FIG. 5 is a sectional view of a main part showing a broken part of the conventional metal carrier. 1...Honeycomb part 2...Reinforcement corrugated plate 3...
Outer cylinder 10... Flat plate 11... Corrugated plate Patent applicant Toyota Motor Corporation representative Patent attorney Hiroshi Okawa
Claims (1)
れたハニカム部と、該ハニカム部が収納される外筒とよ
りなるメタル担体において、 該ハニカム部の外周表面と該外筒の内周表面との間には
該ハニカム部の外周表面を少なくとも一周し該平板およ
び該波板の板厚より厚く該外筒の板厚より薄い板厚の補
強波板が介在していることを特徴とする排ガス浄化触媒
用メタル担体。(1) In a metal carrier consisting of a honeycomb part formed by stacking a flat plate and a corrugated plate and winding them into a roll, and an outer cylinder in which the honeycomb part is housed, the outer circumferential surface of the honeycomb part and the outer cylinder A reinforcing corrugated plate is interposed between the inner circumferential surface and the outer circumferential surface of the honeycomb portion at least once and has a thickness greater than that of the flat plate and the corrugated plate and thinner than that of the outer cylinder. Characteristic metal carrier for exhaust gas purification catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1101979A JP2600899B2 (en) | 1989-04-21 | 1989-04-21 | Metal carrier for exhaust gas purification catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1101979A JP2600899B2 (en) | 1989-04-21 | 1989-04-21 | Metal carrier for exhaust gas purification catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02280842A true JPH02280842A (en) | 1990-11-16 |
| JP2600899B2 JP2600899B2 (en) | 1997-04-16 |
Family
ID=14314977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1101979A Expired - Fee Related JP2600899B2 (en) | 1989-04-21 | 1989-04-21 | Metal carrier for exhaust gas purification catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2600899B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5494642A (en) * | 1993-12-28 | 1996-02-27 | Toyota Jidosha Kabushiki Kaisha | Electrically heated catalytic converter for an engine |
| JP2005522324A (en) * | 2002-04-18 | 2005-07-28 | エミテック ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング | Catalyst carrier with corrugated cylinder and manufacturing method thereof |
| EP2518286A1 (en) * | 2011-04-28 | 2012-10-31 | J. Eberspächer GmbH & Co. KG | Component for motor vehicles and method for its production |
-
1989
- 1989-04-21 JP JP1101979A patent/JP2600899B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5494642A (en) * | 1993-12-28 | 1996-02-27 | Toyota Jidosha Kabushiki Kaisha | Electrically heated catalytic converter for an engine |
| JP2005522324A (en) * | 2002-04-18 | 2005-07-28 | エミテック ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング | Catalyst carrier with corrugated cylinder and manufacturing method thereof |
| JP4751021B2 (en) * | 2002-04-18 | 2011-08-17 | エミテック ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング | Catalyst carrier with corrugated cylinder and manufacturing method thereof |
| EP2518286A1 (en) * | 2011-04-28 | 2012-10-31 | J. Eberspächer GmbH & Co. KG | Component for motor vehicles and method for its production |
| CN102759004A (en) * | 2011-04-28 | 2012-10-31 | J·埃贝斯佩歇合资公司 | Component for motor vehicles and method for its production |
| US8622167B2 (en) | 2011-04-28 | 2014-01-07 | J. Eberspaecher Gmbh & Co. Kg | Component for motor vehicles and method for its production |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2600899B2 (en) | 1997-04-16 |
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