JPH06226111A - Metal carrier for catalytic device - Google Patents
Metal carrier for catalytic deviceInfo
- Publication number
- JPH06226111A JPH06226111A JP5015561A JP1556193A JPH06226111A JP H06226111 A JPH06226111 A JP H06226111A JP 5015561 A JP5015561 A JP 5015561A JP 1556193 A JP1556193 A JP 1556193A JP H06226111 A JPH06226111 A JP H06226111A
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb body
- flat plate
- metal carrier
- layer portion
- inner layer
- 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 abstract description 21
- 239000002184 metal Substances 0.000 title claims abstract description 21
- 230000003197 catalytic effect Effects 0.000 title abstract description 3
- 239000003054 catalyst Substances 0.000 claims description 14
- 230000008646 thermal stress Effects 0.000 abstract description 7
- 229910000963 austenitic stainless steel Inorganic materials 0.000 abstract description 3
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 abstract 1
- 239000010935 stainless steel Substances 0.000 abstract 1
- 230000008602 contraction Effects 0.000 description 5
- 238000005219 brazing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内燃機関の排気ガス浄
化装置に用いられる触媒装置用メタル担体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal carrier for a catalyst device used in an exhaust gas purifying device for an internal combustion engine.
【０００２】[0002]
【従来の技術】従来の排気ガス浄化装置に用いられる触
媒装置用メタル担体は、平板と波板とを重ねてロール状
に巻いてハニカム体を形成し、そのハニカム体を金属製
外筒内に収容したものが知られている（例えば 特開昭
５６−４３７３号公報）。このメタル担体は、ハニカム
体を構成する平板と波板、および外筒とハニカム体とが
通常ろう付けによって一体に接合されている。ハニカム
体のハニカム通路表面には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
れて排気ガス浄化触媒の役目をなす。そして内燃機関の
排気通路に配設されて排気ガス中のＨＣ，ＣＯ，ＮＯX
などを浄化する。なお限られた容積中にできるだけ多く
のハニカム通路面積を確保する必要から、平板および波
板の厚さは強度を維持できる範囲内でできるだけ薄くな
っている。2. Description of the Related Art A metal carrier for a catalyst device used in a conventional exhaust gas purifying apparatus is formed by stacking a flat plate and a corrugated plate and winding them in a roll to form a honeycomb body, and the honeycomb body is placed in a metal outer cylinder. The one housed is known (for example, JP-A-56-4373). In this metal carrier, a flat plate and a corrugated plate forming a honeycomb body, and an outer cylinder and a honeycomb body are usually integrally joined by brazing. A catalyst supporting layer made of alumina or the like is formed on the surface of the honeycomb passage of the honeycomb body, and the noble metal catalyst is supported on the catalyst supporting layer and functions as an exhaust gas purifying catalyst. HC, CO, NO x in the exhaust gas is provided in the exhaust passage of the internal combustion engine.
Etc. Since it is necessary to secure as large a honeycomb passage area as possible in a limited volume, the thickness of the flat plate and the corrugated plate is made as thin as possible within a range where strength can be maintained.
【０００３】また、ハニカム体の平板の厚さを波板より
厚くしたものが、実開昭６３−７７６３号公報に開示さ
れていて、平板によりハニカム体の剛性が確保されるよ
うになっている。A honeycomb body having a flat plate thicker than a corrugated plate is disclosed in Japanese Utility Model Laid-Open No. 63-7763, and the flat plate ensures the rigidity of the honeycomb body. .
【０００４】[0004]
【発明が解決しようとする課題】上述した従来の触媒装
置用メタル担体においては、ハニカム体を通過する排気
ガスの流速がハニカム体の外層部より内層部に至るほど
大きく、したがってハニカム体では高温の排気ガスとの
接触、触媒反応による発熱および外筒からの熱放散によ
り、内層部ほど高温で外層部ほど低温となる温度分布を
生じる。この温度分布により、温度の高いハニカム体の
内層部の膨張・収縮量が、温度の低い外層部の膨張・収
縮量より大となるために、内層部と外層部との間に熱応
力が発生する。この熱応力は、ハニカム体の膨張・収縮
のたびに繰返され、特に外筒によって膨張・収縮の動き
が規制される最外層部において影響が著しく、そのため
ハニカム体の最外周の波板が塑性変形を起して金属疲労
を生じ、遂には破断に至るという欠点がある。またハニ
カム体の平板の厚さを波板より厚くしたハニカム体で
は、平板によりハニカム体の剛性が確保されるため局部
的な変形による波板の破断が防止されるが、平板を厚く
することにより排気通路内における平板の空気抵抗が大
きくなり、排気性能が低下するという欠点がある。In the above-mentioned conventional metal carrier for a catalyst device, the flow velocity of the exhaust gas passing through the honeycomb body is higher from the outer layer portion to the inner layer portion of the honeycomb body, so that the temperature of the honeycomb body becomes higher. Due to the contact with the exhaust gas, the heat generated by the catalytic reaction, and the heat dissipation from the outer cylinder, a temperature distribution is generated in which the inner layer portion has a higher temperature and the outer layer portion has a lower temperature. Due to this temperature distribution, the expansion / contraction amount of the inner layer portion of the high temperature honeycomb body becomes larger than the expansion / contraction amount of the outer layer portion of the low temperature, so that thermal stress is generated between the inner layer portion and the outer layer portion. To do. This thermal stress is repeated each time the honeycomb body expands / contracts, and has a significant effect particularly in the outermost layer portion where the expansion / contraction movement is restricted by the outer cylinder, so that the corrugated plate on the outermost periphery of the honeycomb body is plastically deformed. There is a drawback that it causes metal fatigue and eventually breaks. Further, in a honeycomb body in which the thickness of the flat plate of the honeycomb body is thicker than that of the corrugated plate, the flat plate ensures rigidity of the honeycomb body to prevent breakage of the corrugated plate due to local deformation, but by thickening the flat plate There is a drawback in that the air resistance of the flat plate in the exhaust passage becomes large and the exhaust performance deteriorates.
【０００５】本発明の目的は、ハニカム体の外層部の波
板に熱応力による金属疲労を生せず、かつ排気性能を低
下させない新規な触媒装置用メタル担体を提供するにあ
る。An object of the present invention is to provide a novel metal carrier for a catalyst device which does not cause metal fatigue due to thermal stress on the corrugated plate of the outer layer portion of the honeycomb body and does not deteriorate exhaust performance.
【０００６】[0006]
【課題を解決するための手段】本発明の触媒装置用メタ
ル担体は、平板と波板とを重ねてロール状に巻いて形成
されたハニカム体と、ハニカム体の外側面を被覆する外
筒を有する触媒装置用メタル担体において、ハニカム体
の外層部を構成する平板が、最外層より内側へ向かって
１層以上の範囲において、内層部の平板より高温強度の
優れた平板を有している。MEANS FOR SOLVING THE PROBLEMS A metal carrier for a catalyst device according to the present invention comprises a honeycomb body formed by stacking a flat plate and a corrugated plate and winding them in a roll shape, and an outer cylinder covering an outer surface of the honeycomb body. In the metal carrier for a catalyst device, the flat plate forming the outer layer portion of the honeycomb body has a flat plate having a higher temperature strength than the flat plate of the inner layer portion in the range of one or more layers inward from the outermost layer.
【０００７】[0007]
【作用】ハニカム体の外層部を構成する平板に、最外層
より一層以上の範囲において、内層部の平板より高温強
度の優れた材料を使用することにより、排気抵抗を増加
させることなく平板の厚さを波板より厚くしたのと強度
上同等の効果が得られ、さらに外層部の平板に内層部よ
り高温強度の優れた平板を使用することは、同時に内層
部の平板より熱膨張係数の大なる平板を使用することに
なるので、外層部の温度が内層部より低くても、外層部
の膨張・収縮の量が増加して、内層部の膨張・収縮に追
従することができ、したがって外層部と内層部の間に発
生する熱応力を緩和して、外層部の波板の熱応力による
金属疲労の発生を防止する。The thickness of the flat plate is increased without increasing the exhaust resistance by using a material having a higher temperature strength than the flat plate of the inner layer in the flat plate constituting the outer layer part of the honeycomb body in the range of one or more layers than the outermost layer. It is possible to obtain the same effect in terms of strength as making the plate thicker than the corrugated plate, and to use a flat plate with higher temperature strength than the inner layer for the flat plate of the outer layer, at the same time, the coefficient of thermal expansion is larger than that of the flat plate of the inner layer. Therefore, even if the temperature of the outer layer portion is lower than that of the inner layer portion, the amount of expansion / contraction of the outer layer portion can be increased to follow the expansion / contraction of the inner layer portion. The thermal stress generated between the inner layer and the inner layer is relaxed to prevent metal fatigue due to the thermal stress of the corrugated plate of the outer layer.
【０００８】[0008]
【実施例】次に、本発明の実施例について図面を参照し
て説明する。Embodiments of the present invention will now be described with reference to the drawings.
【０００９】図１は本発明の触媒装置用メタル担体のハ
ニカム体が、ロール状に巻かれて形成される一実施例を
示し、その形成途中の斜視略図である。図２は本実施例
の形成されたものの斜視略図である。FIG. 1 shows an embodiment in which a honeycomb body of a metal carrier for a catalyst device of the present invention is wound in a roll shape, and is a schematic perspective view during the formation thereof. FIG. 2 is a schematic perspective view of the formed part of this embodiment.
【００１０】図１において、ハニカム体１は、内層部に
おいて平板２と波板３を重ねてロール状に巻いてハニカ
ム構造に形成され、外層部において平板２の端部が別の
平板２’と接続部４において重ね継ぎされて、引き続き
波板３とロール状に巻かれて外層部を形成する。本実施
例においては、別の平板２’を用いる外層部は、図２に
示すように、工作上適当な２層で構成されているが、ハ
ニカム体が使用される温度条件によっては、３層とする
こともできる。内層部を構成する平板２と波板３の材料
には、耐酸化性の観点からフェライト系ステンレス鋼板
が使用される。外層部に使用される別の平板２’は、内
層部の平板２に比べ高温強度が高くかつ熱膨張係数の大
きいニッケル基または鉄基超耐熱合金あるいはオーステ
ナイト系ステンレス鋼板が好適である。平板２と別の平
板２’との接続部４は、お互いの端部を重ね合わせて点
溶接またはろう付けにより重ね継ぎされる。ハニカム体
１の外側面は、オーステナイト系ステンレス鋼板製の外
筒５によって被覆されかつ外筒とろう付けによって接合
されている。In FIG. 1, a honeycomb body 1 is formed in a honeycomb structure by stacking a flat plate 2 and a corrugated plate 3 in an inner layer portion and winding them in a roll shape, and an end portion of the flat plate 2 is formed into another flat plate 2'in the outer layer portion. They are spliced together at the connection portion 4 and subsequently wound in a roll shape with the corrugated sheet 3 to form an outer layer portion. In the present embodiment, the outer layer portion using another flat plate 2'is composed of two layers suitable for working as shown in FIG. 2, but three layers are formed depending on the temperature condition in which the honeycomb body is used. Can also be As a material for the flat plate 2 and the corrugated plate 3 forming the inner layer portion, a ferritic stainless steel plate is used from the viewpoint of oxidation resistance. The other flat plate 2'used for the outer layer portion is preferably a nickel-base or iron-base super heat-resistant alloy or an austenitic stainless steel plate which has a high temperature strength and a large thermal expansion coefficient as compared with the flat plate 2 of the inner layer portion. The connecting portion 4 between the flat plate 2 and the other flat plate 2'is overlapped with each other at their end portions and spliced together by spot welding or brazing. The outer surface of the honeycomb body 1 is covered with an outer cylinder 5 made of austenitic stainless steel plate and joined to the outer cylinder by brazing.
【００１１】本実施例に示したハニカム体の断面形状は
円形であるが、この他にレーストラック形、オーバル形
などの周知の形状とすることができる。Although the honeycomb body shown in this embodiment has a circular cross-section, other known shapes such as a racetrack shape and an oval shape can be used.
【００１２】[0012]
【発明の効果】以上説明したように本発明は、ハニカム
体の外層部を構成する平板に、１周以上の範囲にわたっ
て内層部を構成する平板より高温強度が高くかつ熱膨張
係数の大きい材料を使用することにより、ハニカム体の
外層部の波板に熱応力による金属疲労を生せず、また平
板の板厚を増さぬために排気性能を低下させないハニカ
ム体が得られるという効果がある。As described above, according to the present invention, the flat plate forming the outer layer portion of the honeycomb body is made of a material having a higher high temperature strength and a larger thermal expansion coefficient than the flat plate forming the inner layer portion over the range of one turn or more. By using the honeycomb body, it is possible to obtain a honeycomb body in which metal fatigue due to thermal stress does not occur in the corrugated plate of the outer layer portion of the honeycomb body and the exhaust performance is not deteriorated because the plate thickness of the flat plate is not increased.
【図１】本発明の触媒装置用メタル担体のハニカム体が
形成される途中の斜視略図である。1 is a schematic perspective view in the middle of forming a honeycomb body of a metal carrier for a catalyst device of the present invention.
【図２】本発明による触媒装置用メタル担体の斜視略図
である。FIG. 2 is a schematic perspective view of a metal carrier for a catalytic device according to the present invention.
１ ハニカム体 ２ 平板（内層部の） ２’ 平板（外層部の） ３ 波板 ４ 接続部 ５ 外筒 1 Honeycomb body 2 Flat plate (inner layer part) 2'Flat plate (outer layer part) 3 Corrugated plate 4 Connection part 5 Outer cylinder
Claims (1)
形成されたハニカム体と、該ハニカム体の外側面を被覆
する外筒を有する、触媒装置用メタル担体において、 前記ハニカム体の外層部を構成する前記平板が、最外層
より内側へ向かって１層以上の範囲において、内層部の
平板より高温強度の優れた平板であることを特徴とする
触媒装置用メタル担体。1. A metal carrier for a catalyst device, comprising: a honeycomb body formed by stacking a flat plate and a corrugated plate and wound in a roll shape; and an outer cylinder covering an outer surface of the honeycomb body. A metal carrier for a catalyst device, wherein the flat plate forming the outer layer portion is a flat plate having a higher temperature strength than the flat plate of the inner layer portion in the range of one or more layers inward from the outermost layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05015561A JP3084162B2 (en) | 1993-02-02 | 1993-02-02 | Metal carrier for catalytic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05015561A JP3084162B2 (en) | 1993-02-02 | 1993-02-02 | Metal carrier for catalytic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06226111A true JPH06226111A (en) | 1994-08-16 |
| JP3084162B2 JP3084162B2 (en) | 2000-09-04 |
Family
ID=11892171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05015561A Expired - Fee Related JP3084162B2 (en) | 1993-02-02 | 1993-02-02 | Metal carrier for catalytic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3084162B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007148940A1 (en) | 2006-06-23 | 2007-12-27 | Posco | Continuous casting machine using molten mold flux |
| EP2446982A1 (en) | 2006-06-23 | 2012-05-02 | Posco | Continuous casting machine and method using molten mold flux |
-
1993
- 1993-02-02 JP JP05015561A patent/JP3084162B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007148940A1 (en) | 2006-06-23 | 2007-12-27 | Posco | Continuous casting machine using molten mold flux |
| EP2446982A1 (en) | 2006-06-23 | 2012-05-02 | Posco | Continuous casting machine and method using molten mold flux |
| US8191607B2 (en) | 2006-06-23 | 2012-06-05 | Posco | Continuous casting machine using molten mold flux |
| US8210238B2 (en) | 2006-06-23 | 2012-07-03 | Posco | Continuous casting machine and method using molten mold flux |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3084162B2 (en) | 2000-09-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |