JP7086885B2 - Honeycomb carrier evaluation device - Google Patents

Honeycomb carrier evaluation device Download PDF

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JP7086885B2
JP7086885B2 JP2019064927A JP2019064927A JP7086885B2 JP 7086885 B2 JP7086885 B2 JP 7086885B2 JP 2019064927 A JP2019064927 A JP 2019064927A JP 2019064927 A JP2019064927 A JP 2019064927A JP 7086885 B2 JP7086885 B2 JP 7086885B2
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honeycomb carrier
diffusion member
combustion gas
pipe
flow
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JP2020165347A (en
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智史 大森
真之 阿部
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NGK Insulators Ltd
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Description

本発明は、ＤＰＦ又は触媒担体等に利用されるハニカム担体の評価を行うためのハニカム担体評価装置に関する。 The present invention relates to a honeycomb carrier evaluation device for evaluating a honeycomb carrier used for a DPF, a catalyst carrier, or the like.

ガソリン車用のハニカム担体の評価項目の一つとして、エンジンを使用した耐熱衝撃性の確認（高温排気ガスと低温排気ガスとを交互にハニカム担体に供給し、ハニカム担体の破損有無の確認）を長時間行う冷熱耐久試験がある。エンジンを用いて冷熱耐久試験を行うと時間及び設備費用がかかる。下記の特許文献１では、エンジンの代わりにバーナーを用いてハニカム担体の試験を行うことが提案されている。 As one of the evaluation items of the honeycomb carrier for gasoline vehicles, confirmation of thermal shock resistance using an engine (confirmation of damage to the honeycomb carrier by alternately supplying high temperature exhaust gas and low temperature exhaust gas to the honeycomb carrier). There is a long-term cold endurance test. Performing a cold endurance test using an engine requires time and equipment costs. In Patent Document 1 below, it is proposed to test a honeycomb carrier using a burner instead of an engine.

特許５３１３７３２号公報Japanese Patent No. 5313732

本発明者らの検討の結果、エンジンの代わりにバーナーを用いてハニカム担体の試験を行ったところ、エンジンの排気ガスをハニカム担体に供給した場合と、バーナーの燃焼ガスをハニカム担体に供給した場合とで、ハニカム担体の内部の温度分布が変わるという新たな課題があることがわかった。具体的には、エンジンの排気ガスをハニカム担体に供給した場合、ハニカム担体の径方向における中央部と周辺部との間の温度差は５０℃程度である。一方、バーナーの燃焼ガスをハニカム担体に供給した場合、ハニカム担体の径方向における周辺部の温度が上がらず、ハニカム担体の径方向における中央部と周辺部との間の温度差が１５０℃程度となった。すなわち、バーナーを用いる試験では、ハニカム担体が車両に搭載された際の温度分布を再現できず、評価精度が低くなっており、改善の余地があるものであった。 As a result of the studies by the present inventors, when the honeycomb carrier was tested using a burner instead of the engine, the case where the exhaust gas of the engine was supplied to the honeycomb carrier and the case where the combustion gas of the burner was supplied to the honeycomb carrier. Therefore, it was found that there is a new problem that the temperature distribution inside the honeycomb carrier changes. Specifically, when the exhaust gas of the engine is supplied to the honeycomb carrier, the temperature difference between the central portion and the peripheral portion in the radial direction of the honeycomb carrier is about 50 ° C. On the other hand, when the combustion gas of the burner is supplied to the honeycomb carrier, the temperature of the peripheral portion in the radial direction of the honeycomb carrier does not rise, and the temperature difference between the central portion and the peripheral portion in the radial direction of the honeycomb carrier is about 150 ° C. became. That is, in the test using the burner, the temperature distribution when the honeycomb carrier was mounted on the vehicle could not be reproduced, the evaluation accuracy was low, and there was room for improvement.

本発明は、上記のような課題を解決するためになされたものであり、その目的の一つは、エンジンの代わりにバーナーを用いつつ、ハニカム担体の評価精度を向上できるハニカム担体評価装置を提供することである。 The present invention has been made to solve the above problems, and one of the purposes thereof is to provide a honeycomb carrier evaluation device capable of improving the evaluation accuracy of the honeycomb carrier while using a burner instead of the engine. It is to be.

本発明に係るハニカム担体評価装置は、一実施形態において、燃焼ガスを発生させるためのバーナーと、燃焼ガスが送入されるための配管と、配管内に配置されたハニカム担体と、配管に設けられるとともに、燃焼ガスの流れ方向においてハニカム担体の上流側に配置され、燃焼ガスがハニカム担体に到達する前に燃焼ガスを拡散させるための拡散部材とを備え、バーナーの燃焼ガスをエンジンの排気ガスに代えてハニカム担体に供給するハニカム担体評価装置であり、拡散部材は、拡散部材の径方向における外周側に設けられた周辺部と、配管の径方向における中央部に配置され、燃焼ガスの流通を阻害する流通阻害部と、拡散部材の径方向において流通阻害部と周辺部との間に延在され、燃焼ガスの流通を許容する流通許容部とを有している円板状の部材であり、配管には、バーナーの先端の周囲を覆う燃焼管、ハニカム担体を格納するハウジング、及び燃焼管とハウジングとの間を接続する接続管が設けられており、拡散部材の周辺部は、接続管及びハウジングの内縁よりも外側に位置するとともに、接続管とハウジングとの間に挟み込まれている。 In one embodiment, the honeycomb carrier evaluation device according to the present invention is provided in a burner for generating combustion gas, a pipe for feeding combustion gas, a honeycomb carrier arranged in the pipe, and a pipe. At the same time, it is arranged on the upstream side of the honeycomb carrier in the flow direction of the combustion gas, and is provided with a diffusion member for diffusing the combustion gas before the combustion gas reaches the honeycomb carrier, and the combustion gas of the burner is used as the exhaust gas of the engine. It is a honeycomb carrier evaluation device that supplies a honeycomb carrier instead of the above, and the diffusion member is arranged at the peripheral portion provided on the outer peripheral side in the radial direction of the diffusion member and the central portion in the radial direction of the pipe, and the combustion gas flows. A disc-shaped member having a flow-inhibiting portion that inhibits the flow of the gas and a flow-allowing portion that extends between the flow-inhibiting portion and the peripheral portion in the radial direction of the diffusion member and allows the flow of combustion gas. The pipe is provided with a combustion pipe that covers the periphery of the tip of the burner, a housing that stores the honeycomb carrier, and a connection pipe that connects the combustion pipe and the housing, and the peripheral portion of the diffusion member is connected. It is located outside the inner edge of the tube and housing and is sandwiched between the connecting tube and the housing .

本発明のハニカム担体評価装置の一実施形態によれば、配管の径方向における中央部に配置され、燃焼ガスの流通を阻害する流通阻害部と、流通阻害部の周囲に配置され、燃焼ガスの流通を許容する流通許容部とを有する拡散部材をハニカム担体の上流に配置する。このため、バーナーの燃焼ガスをハニカム担体に供給してもハニカム担体の温度分布の偏りを低減でき、エンジンの代わりにバーナーを用いつつ、ハニカム担体の評価精度を向上できる。 According to one embodiment of the honeycomb carrier evaluation device of the present invention, a distribution obstruction portion arranged in the central portion in the radial direction of the pipe and obstructing the flow of the combustion gas and a flow obstruction portion arranged around the distribution obstruction portion of the combustion gas. A diffusion member having a distribution permissible portion that allows distribution is arranged upstream of the honeycomb carrier. Therefore, even if the combustion gas of the burner is supplied to the honeycomb carrier, the bias of the temperature distribution of the honeycomb carrier can be reduced, and the evaluation accuracy of the honeycomb carrier can be improved while using the burner instead of the engine.

本発明の実施の形態によるハニカム担体評価装置を示す構成図である。It is a block diagram which shows the honeycomb carrier evaluation apparatus by embodiment of this invention. 図１の第１拡散部材４を示す正面図である。It is a front view which shows the 1st diffusion member 4 of FIG. 図１の第２拡散部材５を示す構成図である。It is a block diagram which shows the 2nd diffusion member 5 of FIG.

以下、本発明を実施するための形態について、図面を参照して説明する。本発明は各実施の形態に限定されるものではなく、その要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、各実施形態に開示されている複数の構成要素の適宜な組み合わせにより、種々の発明を形成できる。例えば、実施の形態に示される全構成要素からいくつかの構成要素を削除してもよい。さらに、異なる実施形態の構成要素を適宜組み合わせてもよい。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to each embodiment, and the components can be modified and embodied without departing from the gist thereof. In addition, various inventions can be formed by appropriately combining the plurality of components disclosed in each embodiment. For example, some components may be removed from all the components shown in the embodiments. Further, the components of different embodiments may be combined as appropriate.

図１は、本発明の実施の形態によるハニカム担体評価装置を示す構成図である。図１に示すように、本実施の形態のハニカム担体評価装置には、バーナー１、配管２、ハニカム担体３、第１拡散部材４及び第２拡散部材５が設けられている。第１拡散部材４は本発明の拡散部材を構成し、第２拡散部材５は本発明の第２拡散部材を構成する。 FIG. 1 is a block diagram showing a honeycomb carrier evaluation device according to an embodiment of the present invention. As shown in FIG. 1, the honeycomb carrier evaluation device of the present embodiment is provided with a burner 1, a pipe 2, a honeycomb carrier 3, a first diffusion member 4, and a second diffusion member 5. The first diffusion member 4 constitutes the diffusion member of the present invention, and the second diffusion member 5 constitutes the second diffusion member of the present invention.

本実施の形態のバーナー１は、燃焼ガス１ａを発生させるための機器である。本実施の形態のバーナー１には空気供給源１０及び可燃ガス供給源１１が接続されている。バーナー１は、空気供給源１０からの空気１０ａと可燃ガス供給源１１からの可燃ガス１１ａとを燃焼させて燃焼ガス１ａを発生させる。空気供給源１０は例えばコンプレッサー又はボンベ等により構成することができ、空気１０ａは圧縮空気であり得る。可燃ガス１１ａとしては、例えば液化天然ガス（ＬＮＧ）等を使用することができる。 The burner 1 of the present embodiment is a device for generating combustion gas 1a. An air supply source 10 and a combustible gas supply source 11 are connected to the burner 1 of the present embodiment. The burner 1 burns the air 10a from the air supply source 10 and the combustible gas 11a from the combustible gas supply source 11 to generate the combustion gas 1a. The air supply source 10 can be configured by, for example, a compressor or a cylinder, and the air 10a can be compressed air. As the combustible gas 11a, for example, liquefied natural gas (LNG) or the like can be used.

バーナー１からの燃焼ガス１ａは配管２に送入される。本実施の形態の配管２には、燃焼管２０、接続管２１及びハウジング２２が設けられている。 The combustion gas 1a from the burner 1 is sent to the pipe 2. The pipe 2 of the present embodiment is provided with a combustion pipe 20, a connecting pipe 21, and a housing 22.

燃焼管２０は、バーナー１の先端の周囲を覆うとともに、バーナー１からの燃焼ガス１ａを接続管２１に案内するための管である。 The combustion pipe 20 is a pipe that covers the periphery of the tip of the burner 1 and guides the combustion gas 1a from the burner 1 to the connecting pipe 21.

本実施の形態の燃焼管２０には、バイパス管２００が接続されている。バイパス管２００は、バーナー１を介さずに空気供給源１０からの空気１０ａを燃焼管２０に供給するための配管である。バイパス管２００から燃焼管２０に供給される空気１０ａを二次エアーと呼ぶ。二次エアーの供給量を調節することにより、燃焼ガス１ａの温度及び燃焼ガス１ａの空気過剰率λを調整することができる。バーナー１による燃焼ガス１ａの発生が止められて、二次エアーのみが配管２内に送られてもよい。 A bypass pipe 200 is connected to the combustion pipe 20 of the present embodiment. The bypass pipe 200 is a pipe for supplying the air 10a from the air supply source 10 to the combustion pipe 20 without going through the burner 1. The air 10a supplied from the bypass pipe 200 to the combustion pipe 20 is called secondary air. By adjusting the supply amount of the secondary air, the temperature of the combustion gas 1a and the excess air ratio λ of the combustion gas 1a can be adjusted. The generation of the combustion gas 1a by the burner 1 may be stopped, and only the secondary air may be sent into the pipe 2.

接続管２１は、燃焼管２０とハウジング２２との間を接続するための管である。バーナー１からの燃焼ガス１ａは、接続管２１を通過してハウジング２２に向かう。本実施の形態の接続管２１の内径は、燃焼管２０の内径及びハニカム担体３の外径よりも小さい。ハニカム担体３の外径が１００ｍｍ程度であるとき、接続管２１の内径が５５ｍｍ程度であり得る。なお、ハニカム担体３の外径は、５０～５００ｍｍの範囲内のものが用いられ、接続管２１は、他の内径及び長さを有する他の接続管２１に交換することができる。 The connection pipe 21 is a pipe for connecting between the combustion pipe 20 and the housing 22. The combustion gas 1a from the burner 1 passes through the connecting pipe 21 and heads for the housing 22. The inner diameter of the connecting pipe 21 of the present embodiment is smaller than the inner diameter of the combustion pipe 20 and the outer diameter of the honeycomb carrier 3. When the outer diameter of the honeycomb carrier 3 is about 100 mm, the inner diameter of the connecting pipe 21 may be about 55 mm. The outer diameter of the honeycomb carrier 3 is in the range of 50 to 500 mm, and the connecting pipe 21 can be replaced with another connecting pipe 21 having another inner diameter and length.

ハウジング２２は、ハニカム担体３を格納する筐体である。ハウジング２２には、筒部２２ａ及び拡径部２２ｂが設けられている。筒部２２ａは、ハニカム担体３の外径と同程度の内径を有する筒状部である。ハニカム担体３は、筒部２２ａの内側に収められている。拡径部２２ｂは、燃焼ガス１ａの流れ方向における下流側に向けて接続管２１の内径から筒部２２ａの内径まで内径が徐々に拡がる筒状部である。本実施の形態では、燃焼ガス１ａの流れ方向における下流側のハウジング２２の端部は開放されている。 The housing 22 is a housing for storing the honeycomb carrier 3. The housing 22 is provided with a tubular portion 22a and a diameter-expanded portion 22b. The tubular portion 22a is a tubular portion having an inner diameter similar to the outer diameter of the honeycomb carrier 3. The honeycomb carrier 3 is housed inside the tubular portion 22a. The diameter-expanded portion 22b is a tubular portion whose inner diameter gradually expands from the inner diameter of the connecting pipe 21 to the inner diameter of the tubular portion 22a toward the downstream side in the flow direction of the combustion gas 1a. In the present embodiment, the end portion of the housing 22 on the downstream side in the flow direction of the combustion gas 1a is open.

本実施の形態のハニカム担体３は、柱状の構造体である。ハニカム担体３の素材としては、セラミックス又は金属が使用され得る。ハニカム担体３には、ハニカム担体３の長手方向に延びる複数のセルがハチの巣状に設けられている。複数のセルは、隔壁により互いに区画されて形成されており、ハニカム担体３の第１端面から第２端面までハニカム担体３を貫通している。また、複数のセルは、ハニカム担体３の内部において流体の流路を形成する。本実施の形態のハニカム担体３は、触媒を担持していてもよい。触媒としては、例えば、ハニカム担体３が車両の排気ガスの浄化に使用される場合、排気ガスを酸化又は還元する機能を有する触媒を用いることができる。触媒としては、貴金属（例えば、白金、ロジウム、パラジウム、ルテニウム、インジウム、銀、金など）、アルミニウム、ニッケル、ジルコニウム、チタン、セリウム、コバルト、マンガン、亜鉛、銅、スズ、鉄、ニオブ、マグネシウム、ランタン、サマリウム、ビスマス、バリウムなどが挙げられる。これらの元素は、金属単体、金属酸化物、及びそれ以外の金属化合物であってもよい。また、触媒は、単独又は２種以上を組み合わせて用いることができる。 The honeycomb carrier 3 of the present embodiment is a columnar structure. As the material of the honeycomb carrier 3, ceramics or metal can be used. The honeycomb carrier 3 is provided with a plurality of cells extending in the longitudinal direction of the honeycomb carrier 3 in a honeycomb shape. The plurality of cells are formed so as to be partitioned from each other by a partition wall, and penetrate the honeycomb carrier 3 from the first end face to the second end face of the honeycomb carrier 3. Further, the plurality of cells form a fluid flow path inside the honeycomb carrier 3. The honeycomb carrier 3 of the present embodiment may carry a catalyst. As the catalyst, for example, when the honeycomb carrier 3 is used for purifying the exhaust gas of a vehicle, a catalyst having a function of oxidizing or reducing the exhaust gas can be used. Catalysts include precious metals (eg platinum, rhodium, palladium, ruthenium, indium, silver, gold, etc.), aluminum, nickel, zirconium, titanium, cerium, cobalt, manganese, zinc, copper, tin, iron, niobium, magnesium, Examples include lantern, sumalium, bismuth, and barium. These elements may be elemental metals, metal oxides, and other metal compounds. In addition, the catalyst can be used alone or in combination of two or more.

ハニカム担体３は、本実施の形態のハニカム担体評価装置により評価試験が行われる対象である。評価試験には、耐熱衝撃性の確認（高温ガスと低温ガスとを交互にハニカム担体３に供給し、ハニカム担体３の破損有無の確認）を長時間行う冷熱耐久試験が含まれる。冷熱耐久試験は、バーナー１からの燃焼ガス１ａ、二次エアー並びに燃焼ガス１ａ及び二次エアーの混合ガスがハニカム担体３に供給されることにより実施され得る。 The honeycomb carrier 3 is an object for which an evaluation test is performed by the honeycomb carrier evaluation device of the present embodiment. The evaluation test includes a cold heat durability test in which the thermal shock resistance is confirmed (high temperature gas and low temperature gas are alternately supplied to the honeycomb carrier 3 to confirm whether or not the honeycomb carrier 3 is damaged) for a long time. The cold endurance test can be carried out by supplying the combustion gas 1a, the secondary air, and the mixed gas of the combustion gas 1a and the secondary air from the burner 1 to the honeycomb carrier 3.

第１及び第２拡散部材４，５は、配管２に設けられるとともに、燃焼ガス１ａの流れ方向においてハニカム担体３の上流側に配置されており、燃焼ガス１ａがハニカム担体３に到達する前に燃焼ガス１ａを拡散させるための部材である。第２拡散部材５は、第１拡散部材４よりも上流側に配置されている。第２拡散部材５は、第１拡散部材４と異なる形状を有することが好ましい。但し、第２拡散部材５の形状が第１拡散部材４の形状と同じであってもよい。本実施の形態では、第１拡散部材４は接続管２１とハウジング２２との間に挟み込まれており、第２拡散部材５は燃焼管２０と接続管２１との間に挟み込まれている。 The first and second diffusion members 4 and 5 are provided in the pipe 2 and are arranged on the upstream side of the honeycomb carrier 3 in the flow direction of the combustion gas 1a, before the combustion gas 1a reaches the honeycomb carrier 3. It is a member for diffusing the combustion gas 1a. The second diffusion member 5 is arranged on the upstream side of the first diffusion member 4. The second diffusion member 5 preferably has a shape different from that of the first diffusion member 4. However, the shape of the second diffusion member 5 may be the same as the shape of the first diffusion member 4. In the present embodiment, the first diffusion member 4 is sandwiched between the connecting pipe 21 and the housing 22, and the second diffusion member 5 is sandwiched between the combustion pipe 20 and the connecting pipe 21.

次に、図２は、図１の第１拡散部材４を示す正面図である。図２に示すように、本実施の形態の第１拡散部材４は、円板状の部材である。第１拡散部材４には、周辺部４０、流通阻害部４１及び流通許容部４２が設けられている。 Next, FIG. 2 is a front view showing the first diffusion member 4 of FIG. As shown in FIG. 2, the first diffusion member 4 of the present embodiment is a disk-shaped member. The first diffusion member 4 is provided with a peripheral portion 40, a distribution obstruction portion 41, and a distribution allowance portion 42.

周辺部４０は、第１拡散部材４の径方向における外周側に設けられた円環状の部分である。周辺部４０には、周方向に互いに離間する複数の貫通孔４００が設けられている。周辺部４０は、接続管２１とハウジング２２との間に挟み込まれる。第１拡散部材４を接続管２１及びハウジング２２に固定する際に、ボルト及びナット等の締結部材が貫通孔４００に通される。第１拡散部材４が接続管２１及びハウジング２２に取り付けられた際、第１拡散部材４、接続管２１及びハウジング２２が互いに同軸であることが好ましい。また、第１拡散部材４が接続管２１及びハウジング２２に取り付けられた際、周辺部４０は、図２において二点鎖線で示す接続管２１及びハウジング２２の内縁２１ａ，２２ｃよりも外側に位置する。周辺部４０（接続管２１及びハウジング２２の内縁２１ａ，２２ｃ）の内側に流通阻害部４１及び流通許容部４２が設けられている。 The peripheral portion 40 is an annular portion provided on the outer peripheral side of the first diffusion member 4 in the radial direction. The peripheral portion 40 is provided with a plurality of through holes 400 that are separated from each other in the circumferential direction. The peripheral portion 40 is sandwiched between the connecting pipe 21 and the housing 22. When fixing the first diffusion member 4 to the connecting pipe 21 and the housing 22, fastening members such as bolts and nuts are passed through the through hole 400. When the first diffusion member 4 is attached to the connecting pipe 21 and the housing 22, it is preferable that the first diffusion member 4, the connecting pipe 21 and the housing 22 are coaxial with each other. Further, when the first diffusion member 4 is attached to the connecting pipe 21 and the housing 22, the peripheral portion 40 is located outside the inner edges 21a and 22c of the connecting pipe 21 and the housing 22 shown by the alternate long and short dash line in FIG. .. A distribution obstruction unit 41 and a distribution allowance unit 42 are provided inside the peripheral portion 40 (inner edges 21a and 22c of the connection pipe 21 and the housing 22).

流通阻害部４１は、配管２（接続管２１及びハウジング２２）の径方向における中央部に配置されており、燃焼ガス１ａの流通を阻害するための部分である。本実施の形態の流通阻害部４１は、第１拡散部材４の中央部に設けられた孔に取り付けられた円板体によって構成されている。流通阻害部４１は、後述の開口４２０が設けられていない非開口部等の他の態様を採ってもよい。 The flow obstruction portion 41 is arranged at the central portion in the radial direction of the pipe 2 (connecting pipe 21 and housing 22), and is a portion for obstructing the flow of the combustion gas 1a. The distribution obstruction portion 41 of the present embodiment is composed of a disk body attached to a hole provided in the central portion of the first diffusion member 4. The distribution obstruction unit 41 may adopt another embodiment such as a non-opening portion which is not provided with the opening 420 described later.

流通許容部４２は、流通阻害部４１の周囲に配置され、燃焼ガス１ａの流通を許容するための部分である。本実施の形態の流通許容部４２は、互いに離間して設けられた複数の開口４２０を有している。本実施の形態の開口４２０は、複数の列をなすように配置されている。図２では、鉛直方向に対して４５度傾斜する複数の平行線に沿って開口４２０が配置されている。また、開口４２０は千鳥配置されている。すなわち、第１列の開口４２０は、第１列の隣に位置する第２列の開口４２０に対して第１及び第２列の延在方向にずれて配置されている。但し、開口４２０の配置は、任意であり、例えば放射状等の他の配置であってもよい。 The distribution permissible unit 42 is arranged around the distribution obstruction unit 41 and is a portion for permitting the distribution of the combustion gas 1a. The distribution allowance portion 42 of the present embodiment has a plurality of openings 420 provided apart from each other. The openings 420 of this embodiment are arranged so as to form a plurality of rows. In FIG. 2, the openings 420 are arranged along a plurality of parallel lines inclined by 45 degrees with respect to the vertical direction. Further, the openings 420 are staggered. That is, the openings 420 in the first row are arranged so as to be offset in the extending direction of the first and second rows with respect to the openings 420 in the second row located next to the first row. However, the arrangement of the openings 420 is arbitrary, and may be other arrangements such as radial.

第１拡散部材４が設けられている位置を燃焼ガス１ａが通過する際、接続管２１及びハウジング２２の径方向における中央部の燃焼ガス１ａの流れが流通阻害部４１によって阻害される。燃焼ガス１ａは、流通阻害部４１を迂回して、流通許容部４２を通って下流に向かう。このとき、接続管２１及びハウジング２２の径方向における中央部の燃焼ガス１ａが、接続管２１及びハウジング２２の径方向における周辺部の燃焼ガス１ａと攪拌される。このため、第１拡散部材４の下流側では、ハウジング２２の径方向における燃焼ガス１ａの温度分布が一様となるか又は一様に近づけられる。バーナー１の燃焼ガス１ａをハニカム担体３に直接供給すると、ハニカム担体３の径方向における周辺部の温度が上がらず、ハニカム担体の径方向における中央部と周辺部との間の温度差が大きくなることがある。本実施の形態のように、第１拡散部材４を用いることにより、バーナー１の燃焼ガス１ａをハニカム担体３に供給してもハニカム担体３の温度分布の偏りを低減でき、エンジンの代わりにバーナー１を用いつつ、ハニカム担体３の評価精度を向上できる。 When the combustion gas 1a passes through the position where the first diffusion member 4 is provided, the flow of the combustion gas 1a in the central portion in the radial direction of the connection pipe 21 and the housing 22 is obstructed by the flow obstruction portion 41. The combustion gas 1a bypasses the flow obstruction section 41, passes through the flow allowance section 42, and heads downstream. At this time, the combustion gas 1a in the central portion of the connecting pipe 21 and the housing 22 in the radial direction is agitated with the combustion gas 1a in the peripheral portion in the radial direction of the connecting pipe 21 and the housing 22. Therefore, on the downstream side of the first diffusion member 4, the temperature distribution of the combustion gas 1a in the radial direction of the housing 22 becomes uniform or close to uniform. When the combustion gas 1a of the burner 1 is directly supplied to the honeycomb carrier 3, the temperature of the peripheral portion in the radial direction of the honeycomb carrier 3 does not rise, and the temperature difference between the central portion and the peripheral portion in the radial direction of the honeycomb carrier becomes large. Sometimes. By using the first diffusion member 4 as in the present embodiment, even if the combustion gas 1a of the burner 1 is supplied to the honeycomb carrier 3, the bias of the temperature distribution of the honeycomb carrier 3 can be reduced, and the burner can be used instead of the engine. While using 1, the evaluation accuracy of the honeycomb carrier 3 can be improved.

第１拡散部材４に隣接する位置における配管２（接続管２１及びハウジング２２）の内径Ｄ１に対する流通阻害部４１の外径Ｄ２の比率Ｄ２／Ｄ１は、４５％以上かつ６５％以下であることが好ましい。比率Ｄ２／Ｄ１が４５％以上であると、流通阻害部４１を迂回する燃焼ガス１ａの流れが適度となり、燃焼ガス１ａの流れの攪拌作用がより向上する。一方、比率Ｄ２／Ｄ１が６５％を超えると、流通阻害部４１による燃焼ガス１ａの流れの阻害が過多となり、ハニカム担体中央部の温度が上がりにくくなる虞がある。なお、図２では、内径Ｄ１が５５ｍｍであり、外径Ｄ２が３０ｍｍであり、比率Ｄ２／Ｄ１が約５５％の態様を示している。 The ratio D2 / D1 of the outer diameter D2 of the distribution obstruction portion 41 to the inner diameter D1 of the pipe 2 (connecting pipe 21 and housing 22) at a position adjacent to the first diffusion member 4 is 45% or more and 65% or less. preferable. When the ratio D2 / D1 is 45% or more, the flow of the combustion gas 1a bypassing the distribution obstruction portion 41 becomes appropriate, and the stirring action of the flow of the combustion gas 1a is further improved. On the other hand, if the ratio D2 / D1 exceeds 65%, the flow obstruction portion 41 excessively obstructs the flow of the combustion gas 1a, and the temperature of the central portion of the honeycomb carrier may be difficult to rise. Note that FIG. 2 shows an embodiment in which the inner diameter D1 is 55 mm, the outer diameter D2 is 30 mm, and the ratio D2 / D1 is about 55%.

第１拡散部材４は、燃焼ガス１ａの流れ方向に関するハニカム担体３の上流側端面３ａ（図１参照）から８０ｍｍ以上かつ１２０ｍｍ以下の位置に配置されていることが好ましい。第１拡散部材４とハニカム担体３の上流側端面３ａとの離間距離が８０ｍｍ未満であると、ハニカム担体外周部の温度が上がりにくくなる虞がある。一方、離間距離が１２０ｍｍを超えると、ハニカム担体外周部の温度が上がりにくくなる虞がある。なお、ハニカム担体３側の第１拡散部材４の端面を基準として離間距離を測定することができる。 The first diffusion member 4 is preferably arranged at a position of 80 mm or more and 120 mm or less from the upstream end surface 3a (see FIG. 1) of the honeycomb carrier 3 with respect to the flow direction of the combustion gas 1a. If the separation distance between the first diffusion member 4 and the upstream end surface 3a of the honeycomb carrier 3 is less than 80 mm, the temperature of the outer peripheral portion of the honeycomb carrier may be difficult to rise. On the other hand, if the separation distance exceeds 120 mm, the temperature of the outer peripheral portion of the honeycomb carrier may be difficult to rise. The separation distance can be measured with reference to the end surface of the first diffusion member 4 on the honeycomb carrier 3 side.

流通阻害部４１の外縁４１ａと第１拡散部材４に隣接する位置における配管２の内縁（接続管２１及びハウジング２２の内縁２１ａ，２２ｃ）との間に位置する円環領域の全面積Ａ１に対する複数の開口４２０の合計開口面積Ａ２の比率Ａ２／Ａ１は、２０％以上かつ４０％以下であることが好ましい。比率Ａ２／Ａ１が２０％未満であると、抵抗が大きくなりバーナーが燃焼しなくなる虞がある。一方、比率Ａ２／Ａ１が４０％を超えると、ハニカム担体外周部の温度が上がりにくくなる虞がある。 A plurality of annular regions located between the outer edge 41a of the flow obstruction portion 41 and the inner edge of the pipe 2 (inner edges 21a, 22c of the connecting pipe 21 and the housing 22) at a position adjacent to the first diffusion member 4 with respect to the total area A1. The ratio A2 / A1 of the total opening area A2 of the opening 420 is preferably 20% or more and 40% or less. If the ratio A2 / A1 is less than 20%, the resistance may increase and the burner may not burn. On the other hand, if the ratio A2 / A1 exceeds 40%, the temperature of the outer peripheral portion of the honeycomb carrier may be difficult to rise.

開口４２０は、流通阻害部４１の外縁４１ａと第１拡散部材４に隣接する位置における接続管２１及びハウジング２２の内縁２１ａ，２２ｃとの間に位置する円環領域に均一に分散されていることが好ましい。均一に分散されているとは、円環領域を複数の区画に分けた際に、各区画の開口率の差が所定範囲内に収まることと理解することができる。各区画の開口率は、各区画の全面積に対する開口４２０の合計開口面積である。例えば、円環領域の中心で直交する２つ直線により円環領域を４つの区画に分けた際に、各区画の開口率の差が２０％以内に収まる場合に、開口４２０が均一に分散されていると理解することができる。 The openings 420 are uniformly dispersed in the annular region located between the outer edge 41a of the flow obstruction portion 41 and the inner edges 21a and 22c of the connecting pipe 21 and the housing 22 at positions adjacent to the first diffusion member 4. Is preferable. It can be understood that evenly dispersed means that when the annulus region is divided into a plurality of sections, the difference in the aperture ratio of each section is within a predetermined range. The aperture ratio of each compartment is the total opening area of the openings 420 with respect to the total area of each compartment. For example, when the annulus region is divided into four compartments by two straight lines orthogonal to each other at the center of the annulus region, the openings 420 are uniformly dispersed when the difference in aperture ratio of each compartment is within 20%. Can be understood as being.

次に、図３は、図１の第２拡散部材５を示す構成図である。図３の（ａ）は第２拡散部材５の正面図であり、（ｂ）は第２拡散部材５の右側面図であり、（ｃ）は第２拡散部材５の背面図である。図３に示すように、本実施の形態の第２拡散部材５は、ボビン形状の部材である。第２拡散部材５には、筒部５０、第１フランジ５１、第２フランジ５２、軸部５３及び複数の羽部５４が設けられている。 Next, FIG. 3 is a block diagram showing the second diffusion member 5 of FIG. 3A is a front view of the second diffusion member 5, FIG. 3B is a right side view of the second diffusion member 5, and FIG. 3C is a rear view of the second diffusion member 5. As shown in FIG. 3, the second diffusion member 5 of the present embodiment is a bobbin-shaped member. The second diffusion member 5 is provided with a tubular portion 50, a first flange 51, a second flange 52, a shaft portion 53, and a plurality of blade portions 54.

筒部５０は、第２拡散部材５に隣接する位置における燃焼管２０及び接続管２１の内径と同じ内径を有する筒状の部分である。 The tubular portion 50 is a tubular portion having the same inner diameter as the inner diameter of the combustion pipe 20 and the connecting pipe 21 at a position adjacent to the second diffusion member 5.

第１及び第２フランジ５１，５２は、筒部５０の軸方向における両端において筒部５０の外周面から径方向外方に突出された円環状の部分である。第１及び第２フランジ５１，５２には、周方向に互いに離間して設けられた複数の貫通孔５１０，５２０がそれぞれ設けられている。燃焼管２０に設けられたフランジと第１フランジ５１とが隣接された後、ボルト及びナット等の締結部材が貫通孔５１０に通されて、第２拡散部材５が燃焼管２０に取り付けられる。同様に、接続管２１に設けられたフランジと第２フランジ５２とが隣接された後、ボルト及びナット等の締結部材が貫通孔５２０に通されて、第２拡散部材５が接続管２１に取り付けられる。第２拡散部材５が燃焼管２０及び接続管２１に取り付けられた際、第２拡散部材５の筒部５０、燃焼管２０及び接続管２１が同軸であることが好ましい。 The first and second flanges 51 and 52 are annular portions protruding radially outward from the outer peripheral surface of the tubular portion 50 at both ends of the tubular portion 50 in the axial direction. The first and second flanges 51 and 52 are provided with a plurality of through holes 510 and 520 provided apart from each other in the circumferential direction, respectively. After the flange provided on the combustion pipe 20 and the first flange 51 are adjacent to each other, a fastening member such as a bolt and a nut is passed through the through hole 510, and the second diffusion member 5 is attached to the combustion pipe 20. Similarly, after the flange provided on the connecting pipe 21 and the second flange 52 are adjacent to each other, fastening members such as bolts and nuts are passed through the through hole 520, and the second diffusion member 5 is attached to the connecting pipe 21. Be done. When the second diffusion member 5 is attached to the combustion pipe 20 and the connection pipe 21, it is preferable that the tubular portion 50, the combustion pipe 20 and the connection pipe 21 of the second diffusion member 5 are coaxial.

軸部５３は、筒部５０の内側に設けられている。軸部５３は、筒部５０の径方向中心において筒部５０の軸方向に延在されている。 The shaft portion 53 is provided inside the tubular portion 50. The shaft portion 53 extends in the axial direction of the cylinder portion 50 at the radial center of the cylinder portion 50.

複数の羽部５４は、筒部５０の内周壁５００と軸部５３との間に延在されるとともに、筒部５０の周方向に互いに間隔をおいて配置された板状の部分である。複数の羽部５４は、燃焼ガス１ａの流れ方向に関する上流側に配置された上流端５４０ｕ（図３の（ａ）参照）と、燃焼ガス１ａの流れ方向に関する下流側に配置された下流端５４０ｄ（図３の（ｃ）参照）とをそれぞれ有している。複数の羽部５４は、上流端５４０ｕと下流端５４０ｄとが筒部５０の周方向に互いにずれて位置するように、筒部５０の軸方向燃焼ガスの流れ方向にねじれて延在されている。 The plurality of vanes 54 are plate-shaped portions extending between the inner peripheral wall 500 of the tubular portion 50 and the shaft portion 53 and arranged at intervals in the circumferential direction of the tubular portion 50. The plurality of vanes 54 have an upstream end 540u (see (a) in FIG. 3) arranged on the upstream side in the flow direction of the combustion gas 1a and a downstream end 540d arranged on the downstream side in the flow direction of the combustion gas 1a. (See (c) of FIG. 3) and each. The plurality of vanes 54 are twisted and extended in the axial direction of the combustion gas of the cylinder 50 so that the upstream end 540u and the downstream end 540d are positioned so as to be offset from each other in the circumferential direction of the cylinder 50. ..

例えば、図３の（ａ）において、上流端５４０ｕの端部が時計の１２時位置に設けられた羽部５４を第１羽部５４１と呼ぶ。図３の（ａ）のように第２拡散部材５を正面から見たとき、第１羽部５４１は下流側に向かうにつれて時計の９時位置に近づくようにねじれながら延在する。図３（ｃ）のように第２拡散部材５を背面から見たとき、上流端５４０ｕの端部は時計の３時位置（正面から見たときの９時位置）に位置している。図３の（ａ）及び（ｃ）に示すように筒部５０の一端側から第２拡散部材５を軸方向に沿って見たとき、筒部５０の内側は各羽部５４で占められており、筒部５０の他端側は見えない。図３の（ａ）及び（ｃ）では、上流端５４０ｕ及び下流端５４０ｄに隣接して描いた白抜きの扇形により、各羽部５４が奥行を有していることを表現している。また、白抜きの扇形に隣接した網掛けの扇形により各羽部５４の表面を表現している。筒部５０内には、燃焼ガス１ａのねじれた流路が形成されている。図３の（ａ）及び（ｃ）では、各羽部５４がねじれる方向及びねじれた流路に沿って進む燃焼ガス１ａの流れを二点鎖線の矢印にて表現している。ねじれた流路に沿って燃焼ガス１ａが流れることにより、燃焼ガス１ａが攪拌される。 For example, in FIG. 3A, the vane portion 54 having the end portion of the upstream end 540u at the 12 o'clock position of the clock is referred to as the first vane portion 541. When the second diffusion member 5 is viewed from the front as shown in FIG. 3A, the first wing portion 541 extends while twisting so as to approach the 9 o'clock position of the clock toward the downstream side. When the second diffusion member 5 is viewed from the back surface as shown in FIG. 3C, the end portion of the upstream end 540u is located at the 3 o'clock position of the clock (9 o'clock position when viewed from the front surface). As shown in FIGS. 3A and 3C, when the second diffusion member 5 is viewed along the axial direction from one end side of the tubular portion 50, the inside of the tubular portion 50 is occupied by each vane portion 54. The other end of the cylinder portion 50 is not visible. In FIGS. 3A and 3C, the white fan shape drawn adjacent to the upstream end 540u and the downstream end 540d expresses that each vane portion 54 has a depth. Further, the surface of each vane 54 is represented by a shaded fan shape adjacent to the white fan shape. A twisted flow path of the combustion gas 1a is formed in the cylinder portion 50. In FIGS. 3A and 3C, the flow of the combustion gas 1a in which each vane portion 54 is twisted and along the twisted flow path is represented by an arrow of a two-dot chain line. Combustion gas 1a is agitated by flowing the combustion gas 1a along the twisted flow path.

なお、図３の（ａ）及び（ｃ）において、上流端５４０ｕ及び下流端５４０ｄを長方形で示しているが、上流端５４０ｕ及び下流端５４０ｄはうねりを持ったより複雑な形状とすることができる。 In addition, in (a) and (c) of FIG. 3, the upstream end 540u and the downstream end 540d are shown by a rectangle, but the upstream end 540u and the downstream end 540d can have a more complicated shape with undulations.

次に、実施例を挙げる。実施例として、図１に示すハニカム担体評価装置にてハニカム担体３の温度分布調査を行った。実施例の具体的な条件は、以下の通りである。 Next, an example will be given. As an example, the temperature distribution of the honeycomb carrier 3 was investigated by the honeycomb carrier evaluation device shown in FIG. The specific conditions of the examples are as follows.

すなわち、ハニカム担体３の上流側端面３ａを基準に１００ｍｍの位置に第１拡散部材４を配置し、１１００ｍｍの位置に第２拡散部材５を配置した。 That is, the first diffusion member 4 was arranged at a position of 100 mm with respect to the upstream end surface 3a of the honeycomb carrier 3, and the second diffusion member 5 was arranged at a position of 1100 mm.

第１拡散部材４としては、板厚３ｍｍの円板状の部材を使用した。その部材の中心直径３０ｍｍの範囲に流通阻害部４１を形成するとともに、その周囲２５ｍｍの円環領域に流通許容部４２を形成した。流通許容部４２は、上下左右３ｍｍ間隔で直径５ｍｍの開口４２０を均一に設けることにより形成した。 As the first diffusion member 4, a disk-shaped member having a plate thickness of 3 mm was used. A distribution obstruction portion 41 was formed in a range having a central diameter of 30 mm of the member, and a distribution allowance portion 42 was formed in an annular region having a circumference of 25 mm. The flow allowance portion 42 was formed by uniformly providing openings 420 having a diameter of 5 mm at intervals of 3 mm in the vertical and horizontal directions.

第２拡散部材５としては、内径５５ｍｍの筒部５０の内側に４枚の羽部５４を設けたものを使用した。羽部５４の形状は、厚さ２ｍｍ、高さ２７ｍｍ、長さ６０ｍｍとした。各羽部５４は、燃焼ガス１ａの流れ方向に関する第２拡散部材５の上流側と下流側との間で９０度ねじられている。 As the second diffusion member 5, a member having four vane portions 54 provided inside a tubular portion 50 having an inner diameter of 55 mm was used. The shape of the vane 54 was 2 mm in thickness, 27 mm in height, and 60 mm in length. Each vane 54 is twisted 90 degrees between the upstream side and the downstream side of the second diffusion member 5 with respect to the flow direction of the combustion gas 1a.

接続管２１の内径は５５ｍｍとした。燃焼ガス１ａの流量Ｖ１と二次エアーの流量Ｖ２との割合Ｖ１：Ｖ２を８：２とした。 The inner diameter of the connecting pipe 21 was 55 mm. The ratio V1: V2 of the flow rate V1 of the combustion gas 1a and the flow rate V2 of the secondary air was set to 8: 2.

また、比較例として、第１及び第２拡散部材４，５を省略して、ハニカム担体３の温度分布調査を行った。その他の条件は、実施例と同様である。 Further, as a comparative example, the temperature distribution of the honeycomb carrier 3 was investigated by omitting the first and second diffusion members 4 and 5. Other conditions are the same as in the examples.

比較例では、ハニカム担体３の径方向における周辺部の温度が上がらず、ハニカム担体３の径方向における中央部と周辺部との間の温度差が１５０℃程度となった。一方、実施例では、ハニカム担体３の径方向における中心部のみならず周辺部の温度も上がり、ハニカム担体３の径方向における中央部と周辺部との間の温度差が５０℃程度となった。この温度差５０℃程度は、バーナー１を用いずにエンジンからの排気ガスをハニカム担体３に供給した場合と同程度である。 In the comparative example, the temperature of the peripheral portion in the radial direction of the honeycomb carrier 3 did not rise, and the temperature difference between the central portion and the peripheral portion in the radial direction of the honeycomb carrier 3 was about 150 ° C. On the other hand, in the embodiment, the temperature of not only the central portion in the radial direction of the honeycomb carrier 3 but also the peripheral portion increased, and the temperature difference between the central portion and the peripheral portion in the radial direction of the honeycomb carrier 3 became about 50 ° C. .. This temperature difference of about 50 ° C. is about the same as when the exhaust gas from the engine is supplied to the honeycomb carrier 3 without using the burner 1.

本実施の形態のようなハニカム担体評価装置では、配管２の径方向における中央部に配置され、燃焼ガス１ａの流通を阻害する流通阻害部４１と、流通阻害部４１の周囲に配置され、燃焼ガス１ａの流通を許容する流通許容部４２とを有する第１拡散部材４をハニカム担体３の上流に配置するので、バーナー１の燃焼ガス１ａをハニカム担体３に供給してもハニカム担体３の温度分布の偏りを低減でき、エンジンの代わりにバーナー１を用いつつ、ハニカム担体３の評価精度を向上できる。 In the honeycomb carrier evaluation device as in the present embodiment, the flow obstruction section 41 is arranged in the central portion in the radial direction of the pipe 2 and obstructs the flow of the combustion gas 1a, and the flow obstruction section 41 is arranged around the flow obstruction section 41 and burns. Since the first diffusion member 4 having the flow permissible portion 42 that allows the gas 1a to flow is arranged upstream of the honeycomb carrier 3, even if the combustion gas 1a of the burner 1 is supplied to the honeycomb carrier 3, the temperature of the honeycomb carrier 3 is reached. The bias of the distribution can be reduced, and the evaluation accuracy of the honeycomb carrier 3 can be improved while using the burner 1 instead of the engine.

また、第１拡散部材４に隣接する位置における配管２の内径Ｄ１に対する流通阻害部４１の外径Ｄ２の比率Ｄ２／Ｄ１が４５％以上かつ６５％以下であるので、十分な燃焼ガス１ａの流れの攪拌作用を確保しつつ、ハニカム担体３の温度分布をより均一にできる。 Further, since the ratio D2 / D1 of the outer diameter D2 of the flow obstruction portion 41 to the inner diameter D1 of the pipe 2 at the position adjacent to the first diffusion member 4 is 45% or more and 65% or less, a sufficient flow of the combustion gas 1a. The temperature distribution of the honeycomb carrier 3 can be made more uniform while ensuring the stirring action of.

また、第１拡散部材４は、燃焼ガスの流れ方向に関するハニカム担体の上流側端面から８０ｍｍ以上かつ１２０ｍｍ以下の位置に配置されているので、ハニカム担体３の温度分布をより均一にできる。 Further, since the first diffusion member 4 is arranged at a position of 80 mm or more and 120 mm or less from the upstream end surface of the honeycomb carrier with respect to the flow direction of the combustion gas, the temperature distribution of the honeycomb carrier 3 can be made more uniform.

また、流通許容部４２は、互いに離間して設けられた複数の開口を有しているので、容易に流通許容部４２を形成でき、第１拡散部材４の部品コストを低減できる。 Further, since the distribution allowable portion 42 has a plurality of openings provided apart from each other, the distribution allowable portion 42 can be easily formed, and the component cost of the first diffusion member 4 can be reduced.

また、流通阻害部４１の外縁４１ａと第１拡散部材４に隣接する位置における配管２の内縁との間に位置する円環領域の全面積Ａ１に対する複数の開口４２０の合計開口面積Ａ２の比率Ａ２／Ａ１が２０％以上かつ４０％以下であるので、ハニカム担体３の温度分布をより均一にできる。 Further, the ratio A2 of the total opening area A2 of the plurality of openings 420 to the total area A1 of the annular region located between the outer edge 41a of the flow obstruction portion 41 and the inner edge of the pipe 2 at the position adjacent to the first diffusion member 4. Since / A1 is 20% or more and 40% or less, the temperature distribution of the honeycomb carrier 3 can be made more uniform.

また、燃焼ガス１ａの流れ方向における第１拡散部材４の上流側に第１拡散部材４とは異なる形状を有する第２拡散部材５が配置されているので、第１及び第２拡散部材４，５において異なる方式で燃焼ガス１ａの攪拌を行うことができ、ハニカム担体３の温度分布の偏りをより確実に低減できる。 Further, since the second diffusion member 5 having a shape different from that of the first diffusion member 4 is arranged on the upstream side of the first diffusion member 4 in the flow direction of the combustion gas 1a, the first and second diffusion members 4, In 5, the combustion gas 1a can be agitated by different methods, and the bias of the temperature distribution of the honeycomb carrier 3 can be more reliably reduced.

また、上流端５４０ｕと下流端５４０ｄとが筒部５０の周方向に互いにずれて位置するように、筒部５０の軸方向にねじれて延在された複数の羽部５４を第２拡散部材５が有しているので、より確実に第１及び第２拡散部材４，５において異なる方式で燃焼ガス１ａの攪拌を行うことができる。 Further, the second diffusion member 5 has a plurality of vane portions 54 twisted and extended in the axial direction of the tubular portion 50 so that the upstream end 540u and the downstream end 540d are positioned so as to be offset from each other in the circumferential direction of the tubular portion 50. Therefore, the combustion gas 1a can be more reliably agitated in the first and second diffusion members 4 and 5 by different methods.

なお、実施の形態では、第１拡散部材４の上流に第２拡散部材５が設けられるように説明したが、第２拡散部材は省略されてもよい。 In the embodiment, the second diffusion member 5 is provided upstream of the first diffusion member 4, but the second diffusion member may be omitted.

１ バーナー、１ａ 燃焼ガス、２ 配管、３ ハニカム担体、４ 第１拡散部材、４１ 流通阻害部、４２ 流通許容部、４２０ 開口、５ 第２拡散部材、５０ 筒部、５３ 軸部、５４ 羽部、５４０ｄ 下流端、５４０ｕ 上流端、５００ 内周壁 1 Burner, 1a Combustion gas, 2 Piping, 3 Honeycomb carrier, 4 1st diffusion member, 41 Distribution obstruction part, 42 Distribution allowance part, 420 opening, 5th 2nd diffusion member, 50 cylinder part, 53 shaft part, 54 wings 540d downstream end, 540u upstream end, 500 inner wall

Claims (7)

燃焼ガスを発生させるためのバーナーと、
前記燃焼ガスが送入されるための配管と、
前記配管内に配置されているハニカム担体と、
前記配管に設けられるとともに、前記燃焼ガスの流れ方向において前記ハニカム担体の上流側に配置され、前記燃焼ガスが前記ハニカム担体に到達する前に前記燃焼ガスを拡散させるための拡散部材と
を備え、
前記バーナーの前記燃焼ガスをエンジンの排気ガスに代えて前記ハニカム担体に供給するハニカム担体評価装置であり、
前記拡散部材は、
前記拡散部材の径方向における外周側に設けられた周辺部と、
前記配管の径方向における中央部に配置され、前記燃焼ガスの流通を阻害する流通阻害部と、
前記拡散部材の径方向において前記流通阻害部と前記周辺部との間に延在され、前記燃焼ガスの流通を許容する流通許容部と
を有している円板状の部材であり、
前記配管には、前記バーナーの先端の周囲を覆う燃焼管、前記ハニカム担体を格納するハウジング、及び前記燃焼管と前記ハウジングとの間を接続する接続管が設けられており、
前記拡散部材の前記周辺部は、前記接続管及び前記ハウジングの内縁よりも外側に位置するとともに、前記接続管と前記ハウジングとの間に挟み込まれている、
ハニカム担体評価装置。 With a burner to generate combustion gas,
The piping for feeding the combustion gas and
The honeycomb carrier arranged in the pipe and
It is provided in the pipe and is provided on the upstream side of the honeycomb carrier in the flow direction of the combustion gas, and is provided with a diffusion member for diffusing the combustion gas before the combustion gas reaches the honeycomb carrier.
A honeycomb carrier evaluation device that supplies the combustion gas of the burner to the honeycomb carrier in place of the exhaust gas of the engine.
The diffusion member is
Peripheral portions provided on the outer peripheral side in the radial direction of the diffusion member, and
A distribution obstruction portion arranged in the central portion in the radial direction of the pipe and obstructing the flow of the combustion gas, and a distribution obstruction portion.
It is a disk-shaped member that extends between the flow obstructing portion and the peripheral portion in the radial direction of the diffusion member and has a distribution permissible portion that allows the flow of the combustion gas.
The pipe is provided with a combustion pipe that covers the periphery of the tip of the burner, a housing that stores the honeycomb carrier, and a connection pipe that connects the combustion pipe and the housing.
The peripheral portion of the diffusion member is located outside the inner edge of the connecting pipe and the housing, and is sandwiched between the connecting pipe and the housing.
Honeycomb carrier evaluation device. 前記拡散部材に隣接する位置における前記配管の内径（Ｄ１）に対する前記流通阻害部の外径（Ｄ２）の比率（Ｄ２／Ｄ１）は、４５％以上かつ６５％以下である、
請求項１記載のハニカム担体評価装置。 The ratio (D2 / D1) of the outer diameter (D2) of the flow blocking portion to the inner diameter (D1) of the pipe at a position adjacent to the diffusion member is 45% or more and 65% or less.
The honeycomb carrier evaluation device according to claim 1. 前記拡散部材は、前記燃焼ガスの流れ方向に関する前記ハニカム担体の上流側端面から８０ｍｍ以上かつ１２０ｍｍ以下の位置に配置されている、
請求項１又は請求項２に記載のハニカム担体評価装置。 The diffusion member is arranged at a position of 80 mm or more and 120 mm or less from the upstream end face of the honeycomb carrier with respect to the flow direction of the combustion gas.
The honeycomb carrier evaluation device according to claim 1 or 2. 前記流通許容部は、互いに離間して設けられた複数の開口を有している、
請求項１から請求項３までのいずれか１項に記載のハニカム担体評価装置。 The flow allowance portion has a plurality of openings provided apart from each other.
The honeycomb carrier evaluation device according to any one of claims 1 to 3. 前記流通阻害部の外縁と前記拡散部材に隣接する位置における前記配管の内縁との間に位置する円環領域の全面積（Ａ１）に対する前記複数の開口の合計開口面積（Ａ２）の比率（Ａ２／Ａ１）は、２０％以上かつ４０％以下である、
請求項４記載のハニカム担体評価装置。 The ratio (A2) of the total opening area (A2) of the plurality of openings to the total area (A1) of the annular region located between the outer edge of the flow obstruction portion and the inner edge of the pipe at a position adjacent to the diffusion member. / A1) is 20% or more and 40% or less.
The honeycomb carrier evaluation device according to claim 4. 前記燃焼ガスの流れ方向における前記拡散部材の上流側に配置され、前記拡散部材とは異なる形状を有する第２拡散部材
をさらに備える、
請求項１から請求項５までのいずれか一項に記載のハニカム担体評価装置。 A second diffusion member arranged on the upstream side of the diffusion member in the flow direction of the combustion gas and having a shape different from that of the diffusion member is further provided.
The honeycomb carrier evaluation device according to any one of claims 1 to 5. 前記第２拡散部材は、
筒部と、
前記筒部の内側に設けられた軸部と、
前記筒部の内周壁と前記軸部との間に延在されるとともに、前記筒部の周方向に互いに間隔をおいて配置された複数の羽部と
を有しており、
前記複数の羽部は、
前記燃焼ガスの流れ方向に関する上流側に配置された上流端と、
前記燃焼ガスの流れ方向に関する下流側に配置された下流端と、
をそれぞれ有しており、
前記上流端と前記下流端とが前記筒部の周方向に互いにずれて位置するように、前記筒部の軸方向にねじれて延在されている、
請求項６記載のハニカム担体評価装置。 The second diffusion member is
With the cylinder
The shaft portion provided inside the cylinder portion and
It extends between the inner peripheral wall of the tubular portion and the shaft portion, and has a plurality of vanes arranged at intervals in the circumferential direction of the tubular portion.
The plurality of wings are
The upstream end arranged on the upstream side with respect to the flow direction of the combustion gas,
The downstream end arranged on the downstream side in the flow direction of the combustion gas,
Have each
The upstream end and the downstream end are twisted and extended in the axial direction of the tubular portion so as to be positioned so as to be offset from each other in the circumferential direction of the tubular portion.
The honeycomb carrier evaluation device according to claim 6.
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