JP2002303122A - Particulate filter - Google Patents

Particulate filter

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Publication number
JP2002303122A
JP2002303122A JP2001102958A JP2001102958A JP2002303122A JP 2002303122 A JP2002303122 A JP 2002303122A JP 2001102958 A JP2001102958 A JP 2001102958A JP 2001102958 A JP2001102958 A JP 2001102958A JP 2002303122 A JP2002303122 A JP 2002303122A
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Prior art keywords
filter
nonwoven fabric
particulate filter
corrugated
nonwoven
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Pending
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JP2001102958A
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Japanese (ja)
Inventor
Satoshi Gomyo
Zenichiro Kato
Takahiro Matsuura
Yoichi Nagai
Sadakichi Otsubo
Hiromichi Yanagihara
聡 五明
善一郎 加藤
貞吉 大坪
貴宏 松浦
弘道 柳原
陽一 永井
Original Assignee
Sumitomo Electric Ind Ltd
Toyota Motor Corp
トヨタ自動車株式会社
住友電気工業株式会社
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Abstract

PROBLEM TO BE SOLVED: To improve pressure resistance and durability of a particulate filter formed by piling a corrugated panel made of heat resistant metal and non-woven fabric and winding them like a roll, and joining mutual contact parts of the corrugated panel and the non-woven fabric in a thermal diffusion joining method. SOLUTION: The corrugated panel 12 interposed between layers of metal non-woven fabric 13 is provided with a stair shaped buffer part 18. The buffer part 18 absorbs a radial force generated by thermal strain, thereby decreasing stress applied to a joint part 16 between the corrugated panel 12 and the metal non-woven fabric 13 and preventing removal of the joint part to keep pressure resistance and durability.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】この発明は、ディーゼルエンジンなどの排気ガス中に含まれる浮遊粒子(すすに代表されるパティキュレートマター。以下PMと称す)の捕集を行うパティキュレートフィルタに関する。 TECHNICAL FIELD The present invention relates to a particulate filter for collecting suspended particulate contained in the exhaust gas such as a diesel engine (particulate matter typified by soot. Hereinafter referred to as PM).

【0002】 [0002]

【従来の技術】ディーゼルエンジンは、ガソリンエンジンに比べて低燃費である反面、排気ガス中に大気汚染の原因となるPMを含むことが問題となっている。 BACKGROUND OF THE INVENTION diesel engine, while the low fuel consumption compared to the gasoline engine, to include the PM cause of air pollution has become a problem in the exhaust gas.

【0003】このため、エンジンの排気系にトラップを取付け、トラップの容器に装填したパティキュレートフィルタで排気ガス中のPMを捕集除去する技術が開発されている。 [0003] Accordingly, attaching the trap in the exhaust system of the engine, PM collected removal techniques in the exhaust gas in the particulate filter loaded in the container of the trap has been developed.

【0004】そのパティキュレートフィルタは、PM捕集性能に優れることは勿論、振動、ガス圧、ヒートサイクルに対する耐性にも優れることが要求される。 [0004] The particulate filter may, of course be excellent PM trapping performance, vibration, gas pressure, but also excellent resistance to heat cycle is required.

【0005】そこで、その要求に応え得るものとして、 [0005] Therefore, as those that can respond to the request,
本出願人等は、Fe−Cr−Al合金、Ni−Cr−A Applicants have is, Fe-Cr-Al alloy, Ni-Cr-A
l合金等で形成した耐熱性の有る金属繊維の不織布と金属波板を重ねて巻芯上にロール状に巻き取り、これをトラップの耐熱容器に装填するものを開発して特願200 Overlapping a non-woven fabric and metal wave plate heat-resistant metallic fibers formed by l alloy wound into a roll on a winding core, No. 200 to develop what loading it into a heat-resistant container of the trap
0−223144号で提案している。 It proposed in No. 0-223144.

【0006】そのパティキュレートフィルタは、不織布の層間に生じた空間の片端を、隣り合う不織布同士を接合して目留めし、その目留めを千鳥状に行って入口が開放した排気ガスの流入空間と、出口が開放した排気ガスの流出空間を径方向に交互に生じさせたものであって、 [0006] The particulate filter, one end of the space formed between the layers of nonwoven fabric, and the eyes fastened by joining adjacent nonwoven together, inflow space of the exhaust gas inlet is open by performing the eyes fastened in a zigzag pattern When, be those caused alternately outflow space of the exhaust gas outlet is open in the radial direction,
瀘材として働く不織布の振動や繰り返し熱応力による変形破損を、層間に挟んだ波板によって防止している。 The deformation breakage due to vibration or repeated thermal stress of the nonwoven fabric acting as a filter medium, is prevented by corrugated plate sandwiched between the layers.

【0007】また、不織布と波板の相互接触部を熱拡散接合法で接合して渦状に巻き取られた不織布と波板の軸方向相対移動を止め、両者が筍状に滑り出してずれ変形による破損するのを防止している。 Further, due to the mutual contact portion of the nonwoven fabric and the corrugated and joined by thermal diffusion bonding stop relative axial movement of the wound non-woven fabric and the corrugated spirally, both deviation Suberidashi the bamboo shoot-like deformation It is prevented from being damaged.

【0008】 [0008]

【発明が解決しようとする課題】特願2000−223 The object of the invention is to be Solved by the Japanese Patent Application No. 2000-223
144号のパティキュレートフィルタは、耐久性確保のための諸策を施してはいるが、温度変化が著しく、高温になっているときに強い振動や高いガス圧を受けると言った極めて苛酷な条件下で使用されると、波板と不織布の接合部が外れ、波板による補強が不充分になってガス圧により不織布が破損する可能性が残されていた。 144 No. particulate filter, although is subjected to various measures for securing durability, very harsh conditions said subjected to strong vibrations or high gas pressure when the temperature changes significantly, is hot When used below, out junction of corrugated sheet and non-woven fabric, possibly nonwoven corruption has been left by the gas pressure becomes insufficient reinforcement by corrugated sheet.

【0009】そこで、この発明は、苛酷な使用条件下でも不織布と波板の接合部の外れが防止され、高信頼性、 [0009] Therefore, the present invention is also under severe conditions of use is prevented out of the junction of the nonwoven fabric and the corrugated sheet, high reliability,
高耐久性が維持されるパティキュレートフィルタと、接合部が外れた場合でも高耐久性が維持されるパティキュレートフィルタを提供することを課題としている。 A particulate filter that high durability can be maintained, and an object of the invention to provide a particulate filter high durability even if the junction is out is maintained.

【0010】 [0010]

【課題を解決するための手段】上記の課題を解決するため、この発明においては、それぞれが耐熱性金属から成る波板と不織布を重ねてロール状に巻き付け、不織布の層間に生じた空間の片端を目留めして不織布によって区画される排気ガスの流入空間と流出空間を径方向に交互に生じさせ、かつ、波板と不織布の相互接触部を接合して作られるパティキュレートフィルタにおいて、前記波板に、フィルタ半径方向の力を吸収する緩衝部や、フィルタ軸方向の力を吸収する緩衝部を設けたのである。 To solve the above problems BRIEF SUMMARY OF THE INVENTION In the present invention, each wound into a roll stacked corrugated plate and the nonwoven fabric made of a refractory metal, one end of the space formed between the layers of non-woven fabric the by eyes fastened cause alternating inflow space and the outflow space of the exhaust gas is defined in the radial direction by the nonwoven fabric, and, in the particulate filter made by joining the mutual contact portion of the corrugated sheet and the nonwoven fabric, the wave a plate, or a buffer section for absorbing the force of the filter radially, is to provided a buffer portion for absorbing the filter axial force.

【0011】前者の緩衝部は波板の波の山と谷の間に設け、後者の緩衝部は波板のフィルタ軸方向途中に設ける。 [0011] The former of the buffer section is provided between the wave crests and troughs of the corrugated sheet, the latter of the buffer section is provided in the middle filter axial direction of the corrugated plate. この半径方向の力を吸収する緩衝部と軸方向の力を吸収する緩衝部は、単独で設けてもよいが、両者を併用すればより良い効果が望める。 Buffering unit for absorbing buffer portion and axial force to absorb the force of the radial direction may be provided alone, it overlooks better effect if combination.

【0012】フィルタ半径方向の力を吸収する緩衝部は、 (1) 金属繊維の不織布、3次元網状構造体、金網など、 [0012] buffering unit which absorbs the force of the filter radially (1) Metal fibers of the nonwoven fabric, three-dimensional network structure, a wire mesh like,
波板素材よりもヤング率が低くて変形し易い耐熱金属材料で構成する。 Young's modulus than corrugated board material is composed of easily refractory metal material deformed low. (2) 波板の山と谷の間に変形しろとなる襞をつける。 (2) add a fold which becomes white deformed during the corrugated plate of the peaks and valleys. (3) 波板の波形状を階段状にする。 (3) to stepwise wave plate corrugated. と言った方法で形成することができる。 It can be formed by the said method.

【0013】また、軸方向の力を吸収する緩衝部は、 (4) 上記(1) と同様の耐熱金属材料で構成する。 Further, the buffer section for absorbing the axial forces constitute the same refractory metal material (4) above (1). (5) 波板をフィルタ軸方向に分割し、分割波板を間隙をあけて配置する。 (5) corrugated by dividing the filter axial direction, it is disposed at a gap divided wave plate. と言った方法で形成することができる。 It can be formed by the said method.

【0014】上記の課題を解決するもうひとつの策として、この発明では、波板と不織布の積層材をロール状に巻き、必要箇所を目留めし、波板と不織布の接触部を熱拡散接合法等で接合して作られるフィルタを、同心の多重円筒状に分割し、各分割フィルタ間に、フィルタ支持具に保持される耐熱性円筒部材を介在する構造も併せて提供する。 [0014] Another policy to solve the above problem, in this invention, winding the laminated material of the wave plate and the nonwoven fabric into a roll, and eye fastening required portions, the thermal diffusion contact the contact portion of the corrugated sheet and the nonwoven fabric the filter made by joining legal like, divided into concentric multiple cylindrical, between the divided filters, even together provide structure to mediate heat resistant cylindrical member retained in the filter support.

【0015】なお、この構造と前述の緩衝部は併用してよい。 [0015] Incidentally, the buffer portion described above and the structure may be used in combination.

【0016】 [0016]

【作用】不織布と波板の熱拡散接合部は、径方向の引っ張り力(引き剥し力)や軸方向にずれる力(剪断力)を受けた時に外れ易い。 Thermal diffusion junction of the action: a nonwoven corrugated is likely off when subjected tensile force in the radial direction (peeling force) and axially offset force (shearing force).

【0017】この発明で波板に設けた緩衝部は、それ等の力を吸収して接合部を保護する。 The buffering portion provided on the corrugated sheet in the present invention, to protect the joint to absorb forces it like.

【0018】即ち、フィルタ半径方向の力を吸収する緩衝部は、不織布と波板間に熱歪による半径方向の引っ張り応力、圧縮応力が発生すると伸縮してその応力を吸収する。 [0018] That is, the buffer section for absorbing the force of the filter radially nonwoven and wave plates to pull the radial direction by the thermal strain stress, compressive stress is absorbed stretching to the stress to be generated.

【0019】また、フィルタ軸方向の力を吸収する緩衝部は、不織布と波板間に熱歪によって軸方向の相対移動力が発生すると、伸縮してその力を吸収する。 Further, the buffer section for absorbing the filter axial forces, the relative movement force in the axial direction is generated by the thermal strain on the nonwoven fabric and wave plates, stretch to absorb the force. 波板を短冊状に分割し、隙間をあけて配置したものは、波板による不織布の拘束が殆どなされず、不織布が伸縮し易くなって発生する軸方向応力そのものが小さくなる。 Divided wave plate into strips, those arranged at a gap, almost made is not restraint of the nonwoven fabric by a corrugated plate, axial stress itself generated is easily nonwoven is stretchable is reduced.

【0020】従って、不織布と波板の熱拡散接合部に加わる力が緩衝部無しの場合に比べて小さくなり、過酷な条件下で使用したときにも接合部の外れが発生しなくなる。 [0020] Thus, becomes smaller than when the force exerted on the thermal diffusion junction of the nonwoven fabric and the corrugated sheet is no buffer portion, out of the joint even when used does not occur under harsh conditions. これにより充分な耐圧性が保持され、フィルタの破損が防止されて高耐久性が維持される。 Thus sufficient pressure resistance is maintained, high durability can be maintained is prevented damage to the filter.

【0021】次に、フィルタを多重円筒状に分割して分割フィルタ間に円筒部材を介在したものは、フィルタに生じる熱歪がフィルタの分割によって小さくなり、フィルタに加わる応力が非分割フィルタに比べて小さくなる。 Next, by dividing the filter into multiple cylindrical those interposing a cylindrical member between the divided filter, thermal strain generated in the filter is reduced by the division of the filter, than stress applied to the filter in a non-splitting filter smaller Te. また、分割フィルタに加わる半径方向の力が円筒部材によって受け止められるため、接合部に加わるガス圧による引き離し力も小さくなり、これ等によって接合部の外れが防止される。 Further, since the radial forces exerted on the split filter is received by a cylindrical member, force distancing by the gas pressure applied to the junction becomes small, out of the joint is prevented by this or the like. さらに、万一接合部が外れても、 In addition, even off the unlikely event the junction,
円筒部材がガス圧による不織布の膨らみを抑えるため、 Since the cylindrical member is suppressed swelling of the non-woven fabric by the gas pressure,
充分な耐圧性が保持され、高耐久性が維持される。 Sufficient pressure resistance is maintained, high durability is maintained.

【0022】 [0022]

【発明の実施の形態】図1に、この発明のパティキュレートフィルタの一例をトラップの容器に装填した状態にして示す。 DETAILED DESCRIPTION OF THE INVENTION Figure 1 illustrates in the state of being loaded in an example of the container of the trap of the particulate filter of the present invention.

【0023】図の1は、エンジンの排気管の途中に組込むパティキュレートトラップである。 [0023] 1 Figure is a particulate trap incorporating an exhaust pipe of an engine. このトラップ1 This trap 1
は、フランジ付き円筒容器2と、フィルタ支持具3と、 It includes a flanged cylindrical container 2, the filter support 3,
円筒容器2内に装填するパティキュレートフィルタ10 Particulate filter 10 for loading into a cylindrical container 2
とから成る。 Consisting of. 円筒容器2とフィルタ支持具3は、円筒容器2を排気管4の中に挿入し、外周のフランジ5、6を排気管を接続する管継手で挾持して排気管4に装着される。 Cylindrical container 2 and the filter support device 3 inserts the cylindrical container 2 in the exhaust pipe 4 is then clamped to the flange 5, 6 of the outer peripheral in pipe joint for connecting an exhaust pipe attached to an exhaust pipe 4.

【0024】フィルタ支持具3は、中心に片持ちの支軸7を有し、その支軸7を複数本のアーム8でフランジ6 The filter support 3 has a support shaft 7 of the cantilevered center flange 6 and the shaft 7 by a plurality of arms 8
に連結し、アーム8間の穴をフィルタを通過した排気ガスの通路となす構造にしてある。 Linked to, are the holes between the arm 8 to the structure formed by the passage of the exhaust gas passing through the filter.

【0025】パティキュレートフィルタ10は、支持具の支軸7上に差込む巻芯11を有する。 The particulate filter 10 has a core 11 that plugged onto the support shaft 7 of the support. その巻芯11上に、耐熱金属で形成された波板12と、無数の耐熱金属繊維を所定の空孔率をもつように集合結合させて作られる不織布13を重ねた積層材をロール状に巻き付けている。 Thereon winding core 11, a wave plate 12 formed of a refractory metal, a laminate into a roll of extensive nonwoven 13 made collectively coupled to form to have an infinite number of refractory metal fiber predetermined porosity It is wound. また、不織布13の層間に生じた空間の片端を径方向に隣接した不織布の端部を接合して目留めし、その目留めをフィルタの縦断断面視で各層の不織布がジグザグに連なるように行って不織布13によって区画される入口開放の排気ガス流入空間14と、出口開放の排気ガス流出空間15を径方向に交互に生じさせている。 In addition, the eyes fastened by joining the ends of the nonwoven fabric adjacent one end of the space formed between the layers of nonwoven fabric 13 in the radial direction, made the eyes fastened to each layer of non-woven fabric is connected to the zigzag longitudinal sectional view of the filter Te exhaust gas inflow space 14 of the inlet opening which is defined by the nonwoven fabric 13, are caused to alternately exhaust gas outflow space 15 of the outlet opening in the radial direction.

【0026】また、波板12と不織布13の接触部を工業的に有利な拡散接合法で接合している。 Further, it is joined in an industrially advantageous diffusion bonding the contact portion of the corrugated sheet 12 and the nonwoven fabric 13. その接合部を図2に符号16で示す。 Indicated at 16 and the joint portion in FIG.

【0027】17は、フィルタ10と円筒容器2との間に挿入するスペーサであるが、フィルタ10の外周を円筒容器2の内面で直接支える構造にしてスペーサ17を省くこともある。 [0027] 17 is a spacer to be inserted between the filter 10 and the cylindrical container 2, in the structure for supporting directly the periphery of the filter 10 in the inner surface of the cylindrical container 2 is also possible to omit the spacer 17.

【0028】図1のパティキュレートフィルタ10の軸直角断面の一部を展開して図2に示す。 [0028] expand a portion of the cross section perpendicular to the shaft of the particulate filter 10 of FIG. 1 shown in FIG.

【0029】図2に示すように、波板12は、波を階段状に成形して山と谷との間に段部を生じさせたものを用いており、その段部が半径方向応力吸収用の緩衝部18 As shown in FIG. 2, the wave plate 12, wave and using what caused the stepped portion between the molded to peaks and valleys in a stepped shape and the stepped portion radial stress absorption the buffer section 18 of use
となる。 To become.

【0030】図3は、波板12の波の山と谷との間に波板素材よりも低ヤング率の耐熱性材料で形成される部分を設けてそこを緩衝部19として働かせるようにしたもの、また、図4は、波板12の山と谷との間に襞を付けてそこを緩衝部20として働かせるようにしたものである。 [0030] Figure 3 were to work there is provided a portion formed of a heat resistant material having a low Young's modulus than the corrugated material between the wave crests and troughs of the corrugated plate 12 as a buffer portion 19 things, also, FIG. 4 is obtained by such work there as a buffer portion 20 with a fold between the peaks and valleys of the corrugated plate 12.

【0031】図3の緩衝部19は、耐熱金属から成る不織布、3次元網状構造体、金網などで形成されるが、この構造は材質や構造の異なる材料を継ぎ合わせる必要があるし、図4の構造も襞付けの工程を必要とし、製造が面倒になる。 The buffer unit 19 of Figure 3, a nonwoven fabric made of refractory metal, a three-dimensional network structure, but is formed like a wire mesh, to this structure, it is necessary to splice materials of different material and structure, 4 also requires pleating process, manufacturing is troublesome in structure. これに対し、図2の緩衝部18は、階段形状の成形面を有する金型で金属板に波付けする方法で簡単に製造できる利点がある。 In contrast, the buffer unit 18 of FIG. 2 has the advantage that can be easily produced by a method of attaching a wave to the metal plate in a mold having a molding surface of stepped shape.

【0032】図5、図6は、波板12の途中に、フィルタ軸方向の緩衝部21、22を設けた例を示している。 FIG. 5, FIG. 6, in the middle of the wave plate 12, shows an example in which the buffer portion 21, 22 of the filter axial direction.

【0033】図5の緩衝部21は、波板12を幅Wで短冊状に分割し、分割波板間に隙間gをあけて形成されている。 The buffer unit 21 of FIG. 5, a wave plate 12 is divided into strips with a width W, and is formed with a gap g in divided wave plates. また、図6の緩衝部22は、波板12の一部を波板素材よりもヤング率の低い耐熱性材料、例えば金属繊維の不織布、3次元網状構造体、金網などに置換して形成されている。 Further, the buffer unit 22 of Figure 6, low heat resistance material Young's modulus than corrugated material part of the wave plate 12, for example, a metal fiber nonwoven fabric, three-dimensional network structure is formed by replacing the like wire mesh ing. 図6の構造は、図3のそれと同様、材料の継ぎ合わせが不可欠であるが、図5の構造はその手間を必要としない。 Structure of FIG. 6, similar to that of FIG. 3, although seaming material is essential, the structure of FIG. 5 does not require the effort.

【0034】なお、図2〜図6の緩衝部は、応力緩和の機能のほかに、使用時のガス圧や振動に耐えることも要求される。 [0034] Incidentally, the buffer unit of Figures 2-6, in addition to the function of stress relaxation, is also required to withstand the gas pressure and vibration during use. そこで、車両に搭載するフィルタの緩衝部のヤング率について調べたところ、図2〜図4の緩衝部はそのヤング率が、100〜3000MPa、図6の緩衝部は100〜10000MPaの範囲にあるのが好ましかった。 Therefore, were examined for the Young's modulus of the buffer section of the filter to be mounted on a vehicle, the buffer section has a Young's modulus of 2 to 4 is the 100~3000MPa, the buffer portion of Fig. 6 is in the range of 100~10000MPa it was preferred.

【0035】また、図5の緩衝部は、波板の分割幅Wを3〜20mm、分割波板間の隙間gを0.1〜10mm Further, the buffer portion of Fig. 5, 3 to 20 mm a division width W of the corrugated plate, 0.1 to 10 mm a gap g divided wave plates
にするのが好ましかった。 It is to to was preferred. 波板の分割幅Wが小さ過ぎたり、隙間gが広過ぎたりすると、波板12が潰れ易くなり、波板による不織布の補強も不安定になって耐圧性に不安が生じる。 Or too small division width W of the wave plate, the gap g is too wide, the more likely collapse the wave plate 12, anxiety is generated in the pressure resistance becomes unstable reinforcement of non-woven fabric by the wave plate. 一方、波板12の幅Wが広過ぎたり、隙間gが狭過ぎたりすると緩衝効果が小さくなって好ましくなかった。 On the other hand, if the width W is too wide wave plate 12, a buffer effect and a gap g is too narrow not preferable smaller.

【0036】なお、このヤング率や波板の分割幅W、隙間gは、パティキュレートトラップの大きさや使用環境によって適正値が変動する。 It should be noted, dividing the width W, the gap g of the Young's modulus and wave plate, proper value varies by particulate trap size and use environment.

【0037】図7は、多重円筒状に分割したパティキュレートフィルタの実施形態である。 FIG. 7 is an embodiment of a particulate filter which is divided into multiple cylinder.

【0038】ここでは、円筒容器2に装填するパティキュレートフィルタ10を、円筒状の内フィルタ23と、 [0038] Here, a particulate filter 10 for loading into a cylindrical container 2, a cylindrical inner filter 23,
その内フィルタの外周に同心にして配置する円筒状外フィルタ24の2つに分割している。 It is divided into two cylindrical outer filter 24 arranged in concentric to the outer periphery of the inner filter. そして、この内、外のフィルタ23、24間に、耐熱金属製の円筒部材25 Then, these, between the outside of the filter 23 and 24, refractory metal cylindrical member 25
を差し込んでいる。 And insert the.

【0039】円筒部材25は、フィルタ支持具3に片持ち支持されており、この円筒部材25が内フィルタ23 The cylindrical member 25, the filter support being cantilevered to 3, the cylindrical member 25 the inner filter 23
の外周と外フィルタ24の内周を支えて両フィルタに加わる半径方向の応力を受け止める。 Receive the radial stress applied to support the inner periphery of the outer peripheral and outer filter 24 to both filters. また、フィルタ10 In addition, the filter 10
を複数に分割したことにより、熱歪が分散されて内フィルタ、外フィルタに加わる応力が非分割フィルタよりも小さくなる。 The by divided into a plurality of inner filter thermal strain is distributed, the stress applied to the outer filter is smaller than the non-split filter. これにより、接合部16が保護され、ガス圧による不織布の膨らみも抑えられる。 Thus, the junction 16 is protected, it is also suppressed swelling of the nonwoven according to the gas pressure. 従って、この構造は緩衝部を特に必要としないが、前述の緩衝部を併用すれば、より好ましいフィルタができる。 Therefore, this structure is not particularly required a buffer portion, when combined buffer portion described above, it is more preferable filter.

【0040】なお、図7の構造でのフィルタ分割数は2 [0040] The filter division number of the structure of FIG. 7 2
乃至3程度、円筒部材25の肉厚は0.5〜1.5mm To 3 mm, wall thickness of the cylindrical member 25 is 0.5~1.5mm
程度が望ましかった。 The degree was desirable. 分割数が多過ぎると製造が煩雑になるだけでなく、容器に対するフィルタ装填も面倒になる。 Not only manufacturing and the division number is too large becomes complicated, the filter loaded also becomes cumbersome with respect to the container. また、フィルタの有効濾過面積が減って捕集性能も低下する。 Also, the collection performance decreases the effective filtration area of ​​the filter also decreases. 円筒部材25が厚過ぎるのも濾過面積減につながるので支持強度を損なわない範囲でその肉厚を極力薄くするのがよく、これ等を考慮して先の望ましいとした値を見い出した。 Since the cylindrical member 25 is too thick leads to decreased filtration area may to as thin as possible and the thickness within a range that does not impair the support strength was found value with the previous preferred in consideration of this and the like.

【0041】以下に、効果の確認試験等について述べる。 [0041] In the following, we describe the confirmation test or the like of the effect.

【0042】外径φ60mm、内径φ10mmのフィルタに、図8(a)の階段形状に形成した波板と、図8 The outer diameter of 60 mm, a filter having an inner diameter .phi.10 mm, a corrugated sheet which is formed in a step shape in FIG. 8 (a), 8
(b)の通常の波板を使用し、フィルタが800℃と1 Normal use the corrugated plate of (b), the filter 800 ° C. and 1
00℃の間で温度変化を繰り返すときに不織布と波板の接合部に発生する半径方向の最大熱応力をシミュレーションで求めた。 Between 00 ° C. was determined by simulation maximum radial thermal stress generated in the bonded portion of the nonwoven fabric and the corrugated plate when repeated temperature changes. その結果、図8(b)の波板(ヤング率E=200000MPa)を使用したときの応力は5M As a result, stress when a wave plate (Young's modulus E = 200,000 mPa) was used in FIG. 8 (b) 5M
Paであった。 Was Pa. これに対し、図8(a)の波板(緩衝部のE=2000MPa)使用時の応力は、0.05MP In contrast, when working stress (E = 2000 MPa of the buffer section) wave plate of FIG. 8 (a), 0.05MP
aと極めて小さかった。 It was very small and a.

【0043】次に、図8(a)、図8(b)の波板を使用したパティキュレートフィルタを2分おきに800℃ Next, FIG. 8 (a), 800 ℃ every two minutes a particulate filter using a wave plate shown in FIG. 8 (b)
と100℃に加熱、冷却し、これを5000サイクル繰り返すヒートサイクル試験を行ったところ、図8(b) When When heated to 100 ° C., cooled, and subjected to heat cycle test to repeat this 5000 cycle, and FIG. 8 (b)
の波板を用いた通常のフィルタは、試験終了時の耐圧強度が初期に比べて30%低下した。 Conventional filter using a wave plate, the compression strength at the end of the study were reduced by 30% compared initially. これに対し、図8 On the other hand, as shown in FIG. 8
(a)の波板を用いたフィルタは耐圧強度の低下が約1 Filter decrease in compressive strength using a wave plate (a) is about 1
0%に抑えられた。 It was suppressed to 0%.

【0044】また、図5に示すように、波板12を幅W [0044] Further, as shown in FIG. 5, the corrugated plate 12 the width W
=10mmで短冊状に分割し、これを分割波板の相互干渉が起こらない間隙(g=3mm)をあけて配置し、その波板と不織布の接合部に発生する軸方向の最大熱応力をシミュレーションで求めた。 = Divided into strips by 10 mm, which was arranged at a gap mutual interference of the divided wave plate does not occur (g = 3 mm), the axial direction of the maximum thermal stress generated in the bonded portion of the corrugated sheet and non-woven fabric obtained in the simulation. その結果、非分割の通常の波板(E=200000MPa、W=36mm)使用時の応力7MPaに対し、分割波板使用時の応力は2M As a result, undivided normal corrugated plate (E = 200000MPa, W = 36mm) with respect to the stress 7MPa in use, the stress at the time of division wave plate used 2M
Paであり、この構造も応力吸収に有効なことを確認した。 Is Pa, was confirmed to be effective in this structure also stress absorption.

【0045】図7の構造についても、非分割フィルタとの発生応力の差を調べた。 [0045] For even the structure of FIG. 7, it was examined the difference in stress generated between the non-split filter. 径方向中間点で2分割したフィルタ(外径φ60mm、内径φ10mm)を用いて分割フィルタ間に円筒部材25を介在したものをモデルとし、これに500kPaの排気ガス圧が加わったと想定してそのときの不織布に生じる最大応力をシミュレーションで求めた。 Radial midpoint in two divided filter (outer diameter 60 mm, inner diameter .phi.10 mm) and the model those interposing a cylindrical member 25 between the split filter using that time on the assumption that this was added the exhaust gas pressure of 500kPa maximum stress generated in the non-woven fabric was determined by simulation. その結果、非分割フィルタ使用時の最大応力は12MPa、分割フィルタ使用時のそれは6MP As a result, the maximum stress at the time of use undivided filter 12 MPa, its use division filter 6MP
aであった。 It was a.

【0046】また、これ等を室温での耐圧試験に供したところ、非分割フィルタの耐圧性は2000kPa、分割フィルタの耐圧性は4000kPaであった。 [0046] In addition, it was subjected to a pressure test at room temperature this like, the breakdown voltage of the non-split filter 2000 kPa, the pressure resistance of the division filter was 4000 kPa. この耐圧性の向上は、分割による応力分散と円筒部材による支持がなされたことによるものである。 The pressure resistance improving is due to support by the stress dispersion and the cylindrical member by division is made.

【0047】 [0047]

【発明の効果】以上述べたように、この発明では、不織布の層間に挿入する波板に半径方向の力や軸方向の力を吸収する緩衝部を設けたので、不織布と波板の接合部に加わる応力が小さくなり、接合部の外れが防止されて耐圧性の低下が抑えられる。 As described above, according to the present invention, in this invention, is provided with the buffer section for absorbing the radial forces and axial forces wave plate inserted between the layers of nonwoven fabric, the junction of the non-woven fabric and the corrugated stress applied to the decreases, prevents the edge of the joint is reduced in pressure resistance is suppressed by.

【0048】フィルタを多重円筒状に分割して分割フィルタ間に支持用円筒部材を介在するものも、熱歪が分散されて接合部に加わる応力が小さくなる。 [0048] which divides the filter multiple cylindrical intervening supporting cylindrical member between division filter also stress thermal strain is applied to the junction is dispersed is small. また、この構造のものは、分割フィルタに加わる半径方向の力が円筒部材に受け止められるので、接合部が仮に外れても耐圧性の低下が抑えられ、ガス圧による不織布の破損が効果的に防止される。 Further, those of this structure, the radial force applied to the split filter is received in the cylindrical member, the bonding portion is reduced in pressure resistance is suppressed even out if, preventing breakage of the nonwoven fabric by gas pressure effectively It is.

【0049】従って、この発明のフィルタは、過酷な使用条件に耐え、高耐久性が維持される。 [0049] Thus, the filter of the present invention, withstand severe use conditions, high durability is maintained.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】この発明のパティキュレートフィルタの実施形態の概要を示す部分破断斜視図 Figure 1 is a partial cutaway perspective view showing an outline of an embodiment of the particulate filter of the present invention

【図2】波板に設ける緩衝部の詳細を示す展開断面図 [Figure 2] developed sectional view showing the details of the buffer section provided on the corrugated sheet

【図3】緩衝部の他の例を示す展開断面図 [Figure 3] developed sectional view showing another example of the buffer section

【図4】緩衝部の更に他の例を示す展開断面図 [4] developed sectional view showing still another example of the buffer section

【図5】軸方向の力を吸収する緩衝部の一例を示す展開斜視図 [5] exploded perspective showing an example of a buffer section for absorbing the axial forces diagram

【図6】軸方向の力を吸収する緩衝部の他の例を示す展開斜視図 6 exploded perspective illustrating another example of the buffer section for absorbing the axial forces diagram

【図7】フィルタを多重円筒状に分割したフィルタの縦断断面図 Figure 7 is a longitudinal sectional view of a filter obtained by dividing the filter into multiple cylindrical

【図8】(a)図2の緩衝部を形成する階段状波板の斜視図 (b)従来の波板の斜視図 [8] (a) a perspective view of a stepped wave plate forming a buffer portion shown in FIG. 2 (b) a perspective view of a conventional corrugated plate

【符号の説明】 DESCRIPTION OF SYMBOLS

1 パティキュレートトラップ 2 円筒容器 3 フィルタ支持具 10 パティキュレートフィルタ 11 巻芯 12 波板 13 不織布 14 排気ガス流入空間 15 排気ガス流出空間 16 熱拡散接合部 18、19、20、21、22 緩衝部 23 内フィルタ 24 外フィルタ 25 円筒部材 1 particulate trap 2 cylindrical container 3 filter support 10 particulate filter 11 core 12 wave plate 13 nonwoven 14 exhaust gas inflow space 15 exhaust gas outlet space 16 thermal diffusion junction 18,19,20,21,22 buffer section 23 inner filter 24 outside the filter 25 the cylindrical member

───────────────────────────────────────────────────── フロントページの続き (72)発明者 五明 聡 伊丹市昆陽北一丁目1番1号 住友電気工 業株式会社伊丹製作所内 (72)発明者 大坪 貞吉 伊丹市昆陽北一丁目1番1号 住友電気工 業株式会社伊丹製作所内 (72)発明者 松浦 貴宏 伊丹市昆陽北一丁目1番1号 住友電気工 業株式会社伊丹製作所内 (72)発明者 加藤 善一郎 豊田市トヨタ町1番地 トヨタ自動車株式 会社内 (72)発明者 柳原 弘道 豊田市トヨタ町1番地 トヨタ自動車株式 会社内 Fターム(参考) 3G090 AA01 EA01 4D019 AA01 BA02 BB03 BB10 BD01 CA03 CB06 4D058 JA33 JB03 JB25 KA03 KA08 KA11 MA41 SA08 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Satoshi Gomyo Itami Koyakita 1 chome, Sumitomo electrical industrial Co., Ltd. in Itami Works (72) inventor Sadakichi Otsubo Itami Koyakita chome No. 1 1 No. Sumitomo electrical industrial Co., Ltd. in Itami Works (72) inventor Takahiro Matsuura Itami Koyakita 1 chome, Sumitomo electrical industrial Co., Ltd. in Itami Works (72) inventor Zen'ichiro Kato Toyota City Toyota-cho, Toyota address automobile Co., Ltd. in the (72) inventor Hiromichi Yanagihara Toyota City, Toyota-cho, Toyota first address Toyota Motor Co., Ltd. in the F-term (reference) 3G090 AA01 EA01 4D019 AA01 BA02 BB03 BB10 BD01 CA03 CB06 4D058 JA33 JB03 JB25 KA03 KA08 KA11 MA41 SA08

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 それぞれが耐熱性金属から成る波板と不織布を重ねてロール状に巻き付け、不織布の層間に生じた空間の片端を目留めして不織布によって区画される排気ガスの流入空間と流出空間を径方向に交互に生じさせ、かつ、波板と不織布の相互接触部を接合して作られるパティキュレートフィルタにおいて、前記波板に、フィルタ半径方向の力を吸収する緩衝部を設けたことを特徴とするパティキュレートフィルタ。 1. A wound into a roll, each overlapping the corrugated plate and the nonwoven fabric made of a refractory metal, inflow and outflow space of the exhaust gas to one end of the space formed between the layers of nonwoven fabric and eye fastening partitioned by nonwoven causing alternating spaces in the radial direction, and, in the particulate filter made by joining the mutual contact portion of the corrugated sheet and the nonwoven fabric, the wave plate, the provision of the cushioning part for absorbing forces of the filter radially particulate filter according to claim.
  2. 【請求項2】 波板の波形状を階段状にして波の山谷間に生じた段部を前記緩衝部となした請求項1記載のパティキュレートフィルタ。 2. A particulate filter according to claim 1, wherein the step portion generated in a mountain valley of the wave and a wave plate corrugated stepwise None of said buffer unit.
  3. 【請求項3】 それぞれが耐熱性金属から成る波板と不織布を重ねてロール状に巻き付け、不織布の層間に生じた空間の片端を目留めして不織布によって区画される排気ガスの流入空間と流出空間を径方向に交互に生じさせ、かつ、波板と不織布の相互接触部を接合して作られるパティキュレートフィルタにおいて、前記波板に、フィルタ軸方向の力を吸収する緩衝部を設けたことを特徴とするパティキュレートフィルタ。 3. A wound into a roll, each overlapping the corrugated plate and the nonwoven fabric made of a refractory metal, inflow and outflow space of the exhaust gas to one end of the space formed between the layers of nonwoven fabric and eye fastening partitioned by nonwoven causing alternating spaces in the radial direction, and, in the particulate filter made by joining the mutual contact portion of the corrugated sheet and the nonwoven fabric, the wave plate, the provision of the cushioning part for absorbing the filter axial force particulate filter according to claim.
  4. 【請求項4】 それぞれが耐熱性金属から成る波板と不織布を重ねてロール状に巻き付け、不織布の層間に生じた空間の片端を目留めして不織布によって区画される排気ガスの流入空間と流出空間を径方向に交互に生じさせ、かつ、波板と不織布の相互接触部を接合して作られるパティキュレートフィルタにおいて、そのフィルタを同心の多重円筒状に分割し、各分割フィルタ間に、フィルタ支持具に保持される耐熱性円筒部材を介在したことを特徴とするパティキュレートフィルタ。 4. A wound into a roll, each overlapping the corrugated plate and the nonwoven fabric made of a refractory metal, inflow and outflow space of the exhaust gas to one end of the space formed between the layers of nonwoven fabric and eye fastening partitioned by nonwoven causing alternating spaces in the radial direction, and, in the particulate filter made by joining the mutual contact portion of the corrugated sheet and the nonwoven fabric, it divides the filter concentric multiple cylindrical, between each division filter, the filter particulate filter, characterized in that interposed heat resistance cylindrical member is held in the support.
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US9855519B2 (en) 2008-07-25 2018-01-02 Donaldson Company, Inc. Pleated filtration media, media packs, filter elements, and methods for filtering fluids
US9108394B2 (en) 2008-08-06 2015-08-18 Donaldson Company, Inc. Method of making a Z-media having flute closures
JP2013500863A (en) * 2009-08-03 2013-01-10 ドナルドソン カンパニー,インコーポレイティド Method and apparatus for forming a fluted filter media having tapered flutes
US10058812B2 (en) 2010-01-25 2018-08-28 Donaldson Company, Inc. Pleated filtration media having tapered flutes

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