JP2006152913A - Muffler structure - Google Patents

Muffler structure Download PDF

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JP2006152913A
JP2006152913A JP2004344390A JP2004344390A JP2006152913A JP 2006152913 A JP2006152913 A JP 2006152913A JP 2004344390 A JP2004344390 A JP 2004344390A JP 2004344390 A JP2004344390 A JP 2004344390A JP 2006152913 A JP2006152913 A JP 2006152913A
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silencer
sound absorbing
absorbing material
space
side wall
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JP4586513B2 (en
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Kazushi Murakami
一志 村上
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Nissan Motor Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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Abstract

<P>PROBLEM TO BE SOLVED: To provide muffler structure for preventing degradation in noise reduction performance caused by moisture contained in exhaust gas, even when a muffler is used for noise reduction of the exhaust gas containing moisture. <P>SOLUTION: A noise absorbing member 3 is arranged at the center of a noise reduction space S in a cylindrical muffler body 1 to form a space between a side wall of the muffler body 1 and the noise absorbing member 3. A swirl flow of pressed-in exhaust gas passes through the space. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、圧送されてきたガスを吸音材を使用して消音する消音器に係り、特に水分を含むガスを消音するのに有効な消音器構造に関する。   The present invention relates to a silencer that silences a pressure-fed gas using a sound absorbing material, and more particularly to a silencer structure that is effective in silencing gas containing moisture.

従来、内燃機関の排気系に設けてある吸音型消音器は、一般に、所定の軸方向に延びる消音器本体内の消音空間内に対し、側壁に多数の通気孔が形成されたインナパイプを貫通させると共に、消音空間におけるインナパイプ外周の空間に、グラスウール等からなる吸音材を充填した構造となっている。
ここで、上記構造の吸音型消音器を燃料電池車両の排気系に設けた場合を想定すると、燃料電池車両の排気ガスは、水素と酸素とから電気エネルギーを発生させる際に生じる水蒸気であることから、消音空間を通過する際に消音器内に溜まった水分が吸音材に含水する。この結果、吸音材の繊維間に形成されている空隙が無くなり消音性能を低下させるという問題がある。 Conventionally, a sound absorbing silencer provided in an exhaust system of an internal combustion engine generally penetrates an inner pipe having a large number of ventilation holes formed in a side wall in a silencer space in a silencer body extending in a predetermined axial direction. In addition, the space around the inner pipe in the sound deadening space is filled with a sound absorbing material made of glass wool or the like.
Here, assuming that the sound absorbing silencer having the above structure is provided in the exhaust system of the fuel cell vehicle, the exhaust gas of the fuel cell vehicle is water vapor generated when electric energy is generated from hydrogen and oxygen. Therefore, the moisture accumulated in the silencer when passing through the silencing space is contained in the sound absorbing material. As a result, there is a problem that there is no gap formed between the fibers of the sound absorbing material and the sound deadening performance is lowered.

この問題に対する従来技術として、例えば特許文献１に記載の技術がある。この技術は、消音器本体の内部空間を、連通孔を有する仕切り板によって、吸音材を充填した上側の吸音室と、下側の拡張室とに区画する構造とするものである。この構造によれば、吸音室内に導入されるガスの水分は、ガス圧で、吸音材を通過し仕切り板の連通孔から下側の拡張室に落下する。落下した水分は、ガスと共に拡張室から排出される。これによって吸音室の吸音材に水分が貯留した状態となることを抑制して、消音性能の低下を防止している。   As a prior art for this problem, for example, there is a technique described in Patent Document 1. In this technique, the internal space of the silencer body is divided into an upper sound absorbing chamber filled with a sound absorbing material and a lower expansion chamber by a partition plate having a communication hole. According to this structure, the moisture of the gas introduced into the sound absorption chamber passes through the sound absorption material and falls from the communication hole of the partition plate to the lower extension chamber due to gas pressure. The dropped water is discharged from the expansion chamber together with the gas. As a result, the sound absorbing material in the sound absorbing chamber is prevented from being in a state where moisture is stored, thereby preventing the sound deadening performance from being lowered.

または、特許文献２に記載のように、吸音材として水はけの良い材料（主に有機繊維を用いる）を使用することで上記消音性能の低下を防止しようとしている。
特開２００２−２０６４１３号公報 特系２００４−１５６５５５号公報 Alternatively, as described in Patent Document 2, the use of a well-drained material (mainly using organic fibers) as the sound absorbing material is intended to prevent the deterioration of the sound deadening performance.
JP 2002-206413 A JP 2004-156555 Gazette

しかし、特許文献１に記載の技術では、吸音材内を水分が通過して下側の拡張室に落下する構造であるので、つまり吸音室の吸音材での吸水を抑制する構成ではないので、燃料電池車両の運転中は、排気ガス中の水分が吸音材中を連続的に通り抜ける状態となるために、常に、吸音材は水分で濡れた状態になっている結果、消音性が低下するという問題がある。   However, the technique described in Patent Document 1 is a structure in which moisture passes through the sound absorbing material and falls into the lower expansion chamber, that is, it is not configured to suppress water absorption in the sound absorbing material of the sound absorbing chamber. During the operation of the fuel cell vehicle, the moisture in the exhaust gas continuously passes through the sound absorbing material, so that the sound absorbing material is always in a wet state with moisture, resulting in a decrease in noise reduction. There's a problem.

また、特許文献２に記載の技術であっても、吸音材中の含水量が低減はするものの、上記と同様に、燃料電池車両の運転中は排気ガス中の水分で常に吸音材は濡れた状態になっている結果、消音性能は低下する。
本発明は、上記のような点に着目したもので、水分を含有するガスの消音に使用されても、含有する水分による消音性能の低下を防止可能な消音器構造を提供することを課題としている。 Further, even with the technique described in Patent Document 2, although the water content in the sound absorbing material is reduced, the sound absorbing material is always wetted by moisture in the exhaust gas during the operation of the fuel cell vehicle as described above. As a result, the silencing performance is reduced.
This invention pays attention to the above points, and it is an object of the present invention to provide a silencer structure capable of preventing the deterioration of the silencing performance due to the contained moisture even if it is used to silence the moisture-containing gas. Yes.

上記課題を解決するために、本実施形態は、吸入口から消音器本体内にガスが圧入され、当該消音器本体内の消音空間に配置された吸音材で吸音した後に排出口からガスを排出する消音器構造において、
上記消音空間を構成する側壁全周と吸音材との間に空間を形成し、上記吸入口から圧入されたガスを旋回流に整流して上記側壁と吸音材との間を通過させる気流調整手段を備えることを特徴とするものである。 In order to solve the above-described problem, the present embodiment is configured such that gas is press-fitted into the silencer body from the suction port, and after the sound is absorbed by the sound absorbing material disposed in the silencer space in the silencer body, the gas is discharged from the discharge port. In the silencer structure to
Airflow adjusting means that forms a space between the entire side wall of the silencing space and the sound absorbing material, rectifies the gas press-fitted from the suction port into a swirling flow, and passes between the side wall and the sound absorbing material It is characterized by providing.

本発明によれば、水分は遠心力で側壁側に飛ばされることで、吸音材と接触する内側に位置するガスは乾いたガスとなる。これにより、吸音材が水分を吸収することを防止できる。   According to the present invention, moisture is blown to the side wall side by centrifugal force, so that the gas located inside contacting the sound absorbing material becomes dry gas. This can prevent the sound absorbing material from absorbing moisture.

次に、本発明の第１実施形態について図面を参照しつつ説明する。
図１は、本実施形態の消音器構造を示す斜視図、図２は軸直方向からみた断面模式図、図３は、軸方向からみた断面模式図である。
なお、本実施形態の消音器は、燃料電池車両の排ガスを処理する経路に設置される消音器を想定するが、それに適用は限定されない。 Next, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing the silencer structure of the present embodiment, FIG. 2 is a schematic cross-sectional view seen from the axial direction, and FIG. 3 is a schematic cross-sectional view seen from the axial direction.
In addition, although the silencer of this embodiment assumes the silencer installed in the path | route which processes the exhaust gas of a fuel cell vehicle, application is not limited to it.

まず構成について説明すると、消音器本体１は所定の軸に沿って延びる円筒形状の筐体であって、その消音器本体１内に形成される消音空間Ｓは、軸直方向の断面が円形状である円柱形状となっている。なお、上記軸は直線である必要は無い。
上記消音器本体１内には、消音器本体１と同軸、若しくは略同軸に内筒２が配置され、その内筒２は消音器本体１に支持されている。内筒２の側壁には多数の通気孔２ａが開口していると共に、内部に吸音材３が充填されている。これによって、消音器本体１の側壁内面全周と吸音材３との間に空間が確保されている。 First, the structure will be described. The silencer body 1 is a cylindrical casing extending along a predetermined axis, and the silencer space S formed in the silencer body 1 has a circular cross section in the axial direction. It has a cylindrical shape. Note that the axis need not be a straight line.
An inner cylinder 2 is disposed in the silencer body 1 coaxially or substantially coaxially with the silencer body 1, and the inner cylinder 2 is supported by the silencer body 1. A large number of air holes 2 a are opened in the side wall of the inner cylinder 2, and the sound absorbing material 3 is filled therein. Thus, a space is secured between the entire inner circumference of the side wall of the silencer body 1 and the sound absorbing material 3.

また、図１中、消音器本体１の左側に吸入口が配置され、右側に排出口が配置されている。
吸入口を構成する吸入管４は、消音器本体１の左端側で消音空間Ｓに入ると共に、図３に示すように、消音器本体１の側壁内面に沿って円弧状に延びるように配置され、その開口端の軸線（噴出方向）が、側壁内面が形成する円筒面に対し接線方向でかつ軸方向に傾斜した方向に設定されている。この設定が気流調整手段を構成する。この構成によって、消音空間Ｓに圧送されたガスの気流は、旋回流となって、消音器本体１の側壁内面に沿って螺旋状に旋回しながら排出口側（図２中右側）に移動する。 Moreover, in FIG. 1, the suction port is arrange | positioned at the left side of the silencer main body 1, and the discharge port is arrange | positioned at the right side.
The suction pipe 4 constituting the suction port enters the silencer space S on the left end side of the silencer body 1 and is arranged so as to extend in an arc along the inner wall of the silencer body 1 as shown in FIG. The axis of the opening end (injection direction) is set in a direction tangential to the cylindrical surface formed by the inner surface of the side wall and inclined in the axial direction. This setting constitutes the airflow adjusting means. With this configuration, the gas airflow pumped into the silencing space S becomes a swirling flow, and moves to the discharge port side (right side in FIG. 2) while spirally swirling along the inner wall of the silencer body 1. .

なお、本実施形態では、吸入管４を側壁内面に沿って円弧状に配置しているが、側壁内面が形成する円筒面に対し接線方向でかつ軸方向に傾斜した方向に噴出方向を設定しておけば、必ずしも、この円弧状の部分は必要はない。ただ、円弧状の管路が有った方が、気流を整流させてより確実に旋回流とすることができる。
また、消音器本体１の右端面には、ガス排出口を構成する排出管５が、軸中心位置に配設されて、消音空間Ｓと外部とを連通している。 In the present embodiment, the suction pipe 4 is arranged in an arc shape along the inner surface of the side wall, but the ejection direction is set in a direction tangential to the cylindrical surface formed by the inner surface of the side wall and inclined in the axial direction. In this case, this arc-shaped portion is not necessarily required. However, it is possible to rectify the air flow and to make a swirl flow more reliably when the arc-shaped pipeline is provided.
Further, on the right end surface of the silencer body 1, a discharge pipe 5 constituting a gas discharge port is disposed at the axial center position so as to communicate the silencer space S with the outside.

次に、上記構成の消音器の作用・効果などについて説明する。
図示しない燃料電池内で水素と酸素とが反応し発電を行うと共に、その反応により生じる水蒸気が排気ガスとして排出される。この多量の水分を含む排気ガスが、不図示の管路を通じて上記消音器に圧送され、吸入管４から消音空間Ｓ内に送られる。このとき、吸入管４の開口端から消音空間Ｓ内に噴射される排気ガスは、消音器本体１の円筒形状の側壁内面に沿って、つまり消音器本体１の側壁と内筒２との間に形成される筒状の空間を螺旋状に旋回し、吸音材３で消音されながら排出管５側に移動して、連続的に当該排出管５から外部（例えば車外）に排出される。 Next, functions and effects of the silencer having the above-described configuration will be described.
Hydrogen and oxygen react in a fuel cell (not shown) to generate power, and water vapor generated by the reaction is discharged as exhaust gas. The exhaust gas containing a large amount of moisture is pumped to the silencer through a pipe line (not shown), and is sent into the silencing space S from the suction pipe 4. At this time, the exhaust gas injected from the opening end of the suction pipe 4 into the silencer space S is along the inner surface of the cylindrical side wall of the silencer body 1, that is, between the sidewall of the silencer body 1 and the inner cylinder 2. The cylindrical space formed in the above is spirally turned, moved to the discharge pipe 5 side while being silenced by the sound absorbing material 3, and continuously discharged from the discharge pipe 5 to the outside (for example, outside the vehicle).

ここで、上記消音空間Ｓ内の排気ガスの気流は、旋回流となっていることから、排気ガス中における相対的に比重の重い水分は、旋回運動の遠心力によって外周側に移動し、気流の内周側に位置するガスは乾いた状態となる。すなわち、消音空間Ｓの中心側に位置する吸音材３と接触するガスは乾いていることから、吸音材３が水分を吸収することが防止されて、含水することによる消音性能低下を防止できる。   Here, since the airflow of the exhaust gas in the silencing space S is a swirling flow, moisture having a relatively high specific gravity in the exhaust gas moves to the outer peripheral side by the centrifugal force of the swirling motion, and the airflow The gas located on the inner peripheral side of the gas is in a dry state. That is, since the gas in contact with the sound absorbing material 3 located on the center side of the sound deadening space S is dry, the sound absorbing material 3 is prevented from absorbing moisture, and the sound absorbing performance can be prevented from being lowered due to the water content.

また、たとえ一時的に吸音材３中に水分が入っても、吸音材３は消音空間Ｓの中央部に位置することから、吸音材３と消音器本体１の下部側壁との空間に落下して排除される。
さらに、ガス中に粉塵などがあっても、当該粉塵も旋回運動の遠心力によって外周側に移動することで吸音材３との接触が抑えられて、粉塵による吸音材３の目詰まりが抑えられる効果もある。 Further, even if moisture enters the sound absorbing material 3 temporarily, the sound absorbing material 3 falls in the space between the sound absorbing material 3 and the lower side wall of the silencer body 1 because the sound absorbing material 3 is located at the center of the sound deadening space S. And eliminated.
Furthermore, even if there is dust or the like in the gas, the dust is also moved to the outer peripheral side by the centrifugal force of the turning motion, so that contact with the sound absorbing material 3 is suppressed, and clogging of the sound absorbing material 3 due to dust is suppressed. There is also an effect.

また、上記説明では、消音空間Ｓの形状を、軸直方向での断面形状が円形形状の空間と説明しているが、当該断面形状が楕円形状や円形状に近い多角形形状であっても良い。円形形状が一番、旋回流のエネルギー損失が小さく、排気ガスの流速低下を抑止出来て強い遠心力を保てることで排気ガス中の水分を効率良く排除出来るので好ましいが、排気ガスの旋回流を維持できるような円形形状に近い輪郭の断面形状となっていればよい。   In the above description, the silencing space S is described as a space having a circular cross-sectional shape in the axial direction, but even if the cross-sectional shape is an elliptical shape or a polygonal shape close to a circular shape. good. The circular shape is the most preferable because the energy loss of the swirling flow is small, and it is possible to suppress the decrease in the exhaust gas flow velocity and maintain a strong centrifugal force, so that moisture in the exhaust gas can be efficiently removed. It is sufficient that the cross-sectional shape has a contour close to a circular shape that can be maintained.

次に、第２実施形態について図面を参照しつつ説明する。なお、上記実施形態と同様な部品などについて同一の符号を付して説明する。
本実施形態の基本構成は、上記第１実施形態と同様であるが、図４に示すように、水吸引管６を備える点だけが異なる。
すなわち、図４に示すように、消音空間Ｓの排出口側に水吸引管６を配置している。その水吸引管６は、上記排出管５の側壁で排出管５内に連通すると共に下方に延び、その下端部を、消音器本体１の下部の側壁内面に接近して配置する。なお、水吸引管６の下端部に対向する側壁を窪ませて水溜まり部を形成しても良い。 Next, a second embodiment will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected and demonstrated about the components similar to the said embodiment.
The basic configuration of the present embodiment is the same as that of the first embodiment, except that a water suction pipe 6 is provided as shown in FIG.
That is, as shown in FIG. 4, the water suction pipe 6 is disposed on the discharge port side of the muffler space S. The water suction pipe 6 communicates with the discharge pipe 5 at the side wall of the discharge pipe 5 and extends downward, and the lower end portion thereof is disposed close to the inner surface of the lower side wall of the silencer body 1. Note that the water reservoir may be formed by recessing the side wall facing the lower end of the water suction pipe 6.

上記構成を採用すると、消音器本体１内を旋回気流として移動する排気ガス流中の水分は消音器本体１の側壁内面に飛ばされ、当該側壁内面に沿って落下して側壁内面の下部に移動する。このとき、排出管５側に向かう旋回流があることから、上記水分は、側壁内面下部のうち排出管５の下側位置に集まる。なお、消音器本体１の軸を排出管５側が低くなるように設定しておいても良い。   If the said structure is employ | adopted, the water | moisture content in the exhaust gas flow which moves the inside of the silencer main body 1 as a whirling airflow will be blown to the inner surface of the side wall of the silencer main body 1, will fall along the said inner surface of the side wall, and will move to the lower part of the inner surface of the side wall To do. At this time, since there is a swirling flow toward the discharge pipe 5, the moisture collects at a position below the discharge pipe 5 in the lower part of the inner surface of the side wall. In addition, you may set the axis | shaft of the silencer main body 1 so that the discharge pipe 5 side may become low.

また、排出管５内をガスが通過することで、上記水吸引管６内は排気ガスに対し負圧となる結果、集まった水分が水吸引管６により吸い上げられ、排出管５を通過する排気ガスと共に外部に排出される。この結果、消音器本体１内に水が溜まることが防止され、つまり吸音材３が含水状態となることをさらに抑えることが可能となる。
その他の構成や作用効果は上記実施形態と同様である。
ここで、上記実施形態では、消音空間Ｓを円柱状としているが、図５のように、消音空間Ｓを円錐台形状として、消音器本体１の側壁と吸音材３との間の環状の空間の軸直方向の断面が、吸入口から排出口に向けて小さくなるように設定しても良い。 Further, as the gas passes through the discharge pipe 5, the water suction pipe 6 has a negative pressure with respect to the exhaust gas. As a result, the collected moisture is sucked up by the water suction pipe 6 and exhausted through the discharge pipe 5. It is discharged to the outside together with gas. As a result, it is possible to prevent water from accumulating in the silencer body 1, that is, to further suppress the sound absorbing material 3 from being in a water-containing state.
Other configurations and operational effects are the same as in the above embodiment.
Here, in the said embodiment, although the silencing space S is made into the column shape, as shown in FIG. 5, the silencing space S is made into a truncated cone shape, and the annular space between the side wall of the silencer main body 1 and the sound absorbing material 3 is used. The cross section in the direction perpendicular to the axis may be set so as to decrease from the suction port toward the discharge port.

このようにすると、排気ガス流が旋回しながら排出管５側に移動するにつれて、気流が通過する断面積が小さくなることで、当該気流の流速が増加して、排気ガスの旋回流の遠心力が大きくなり、より効率よく排気ガス中の水分が排出できるようになることで、更に消音性能低下を防止できる。なお、消音空間Ｓを円錐台形状とする代わりに、吸音材３を充填した内筒２を吸入口から排出口（図５中、左側から右側）に向けて径が大きくなる円錐台形状として、軸方向に沿った吸音材３外周の空間の軸直方向の断面積を、排出口に向けて小さくなるように設定しても良い。   In this way, as the exhaust gas flow moves toward the discharge pipe 5 while swirling, the cross-sectional area through which the airflow passes decreases, so that the flow velocity of the airflow increases and the centrifugal force of the swirling flow of the exhaust gas Since the water content in the exhaust gas can be discharged more efficiently, the noise reduction performance can be further prevented from decreasing. Instead of making the silencing space S into a truncated cone shape, the inner cylinder 2 filled with the sound absorbing material 3 has a truncated cone shape whose diameter increases from the suction port to the discharge port (from the left side to the right side in FIG. 5). You may set so that the cross-sectional area of the axial direction of the space of the sound-absorbing material 3 outer periphery along an axial direction may become small toward a discharge port.

また、図６に示すように、消音器本体１の側壁内面に、ゴルフボールのディンプルのような、凹部７を多数形成しても良い。
多数の凹部７を形成することで、排気ガス自身の粘性によって排気ガスが消音器本体１の内壁にへばりつくようにして移動することで、排気ガスの旋回流によるガス中の水分の排除がより効率的になり、その分さらに消音性能の低下が防止できる。 Moreover, as shown in FIG. 6, you may form many recessed parts 7 like the dimple of a golf ball in the side wall inner surface of the silencer main body 1. As shown in FIG.
By forming a large number of recesses 7, the exhaust gas moves so as to stick to the inner wall of the silencer main body 1 due to the viscosity of the exhaust gas itself, thereby more efficiently removing moisture in the gas by the swirling flow of the exhaust gas. As a result, it is possible to prevent a further decrease in the silencing performance.

次に、第３実施形態について図面を参照しつつ説明する。なお、上記各実施形態と同様な部材には同一の符号を付して説明する。
本実施形態の基本構成は、上記各実施形態と同様であるが、排出管５の配置が異なる。
すなわち、図７〜図９に示すように、排出管５を上記内筒２内の吸音材３を貫通するように配置し、該排出管５の一端部を、右端側で消音空間Ｓ内に臨ませ、他端部を外部に配置している。また、排出管５の側壁のうち、吸音材３を貫通する部分には通気孔５ａが多数開口している。すなわち、上記吸音材３の中心に中空部を構成する貫通孔Ｓ１が形成され該貫通孔Ｓ１を排出管５が通過している。 Next, a third embodiment will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected and demonstrated to the member similar to said each embodiment.
The basic configuration of this embodiment is the same as that of each of the above embodiments, but the arrangement of the discharge pipe 5 is different.
That is, as shown in FIGS. 7 to 9, the discharge pipe 5 is disposed so as to penetrate the sound absorbing material 3 in the inner cylinder 2, and one end of the discharge pipe 5 is placed in the sound deadening space S on the right end side. The other end is arranged outside. In addition, a large number of air holes 5 a are opened in a portion of the side wall of the discharge pipe 5 that penetrates the sound absorbing material 3. That is, the through-hole S1 which comprises a hollow part is formed in the center of the said sound-absorbing material 3, and the exhaust pipe 5 has passed through this through-hole S1.

上記構成では、消音空間Ｓの右側から流入した排気ガスは、旋回流となって消音器本体１の内壁に沿って案内されながら当該消音空間Ｓの右端まで移動する。この間に、気流の内周側の乾いたガスが吸音材３と接触して吸音がなされると共に排気ガス中の水分が遠心力で消音器本体１の内壁に飛ばされて、気流中から水分が除去される。   In the above configuration, the exhaust gas flowing in from the right side of the silencing space S moves as far as the right end of the silencing space S while being guided along the inner wall of the silencer body 1 as a swirling flow. During this time, the dry gas on the inner circumference side of the airflow contacts the sound absorbing material 3 to absorb sound, and the moisture in the exhaust gas is blown to the inner wall of the silencer body 1 by centrifugal force, so that the moisture flows from the airflow. Removed.

このように、水分が除去されながら消音空間Ｓの右側まで移動した排気ガス流は、排出管５内に右端部から導入され、該排出管５内を通過して外部に排気される。このとき、吸音材３の内部を通過することでさらに吸音が行われて、消音器を大型化することなく、排気ガスが接する吸音材３の表面積を大きくとることが出来る結果、さらに消音効果を向上することができる。
また、排出管５内に導入される排気ガス流は、上記旋回流の際に水分が大幅に除去されているので、吸音材３に取り込まれる水分はほとんど無いため、吸音材３の消音性能低下を起こすことが無い。 In this way, the exhaust gas flow that has moved to the right side of the silencing space S while moisture is removed is introduced into the discharge pipe 5 from the right end, passes through the discharge pipe 5 and is exhausted to the outside. At this time, sound absorption is further performed by passing through the inside of the sound absorbing material 3, and the surface area of the sound absorbing material 3 in contact with the exhaust gas can be increased without increasing the size of the silencer. Can be improved.
In addition, since the moisture in the exhaust gas flow introduced into the exhaust pipe 5 is largely removed during the swirling flow, almost no moisture is taken into the sound absorbing material 3, so that the sound absorbing performance of the sound absorbing material 3 is reduced. There is no cause.

本発明に基づく第１実施形態に係る消音器を説明する斜視図である。It is a perspective view explaining the silencer concerning a 1st embodiment based on the present invention. 図１のＡ−Ａ断面模式図である。It is an AA cross-sectional schematic diagram of FIG. 図２のＢ−Ｂ断面模式図である。It is a BB cross-sectional schematic diagram of FIG. 本発明に基づく第２実施形態に係る消音器を説明する断面模式図である。It is a cross-sectional schematic diagram explaining the silencer which concerns on 2nd Embodiment based on this invention. 本発明に基づく実施形態に係る消音器の変形例を説明する断面模式図である。It is a cross-sectional schematic diagram explaining the modification of the silencer which concerns on embodiment based on this invention. 本発明に基づく実施形態に係る消音器の変形例を説明する断面模式図である。It is a cross-sectional schematic diagram explaining the modification of the silencer which concerns on embodiment based on this invention. 本発明に基づく第３実施形態に係る消音器を説明する斜視図である。It is a perspective view explaining the silencer concerning a 3rd embodiment based on the present invention. 図７のＡ−Ａ断面模式図である。It is an AA cross-sectional schematic diagram of FIG. 図８のＢ−Ｂ断面模式図である。It is a BB cross-sectional schematic diagram of FIG.

符号の説明Explanation of symbols

Ｓ 消音空間
１ 消音器本体
２ 内筒
２ａ 通気孔
３ 吸音材
４ 吸入管（吸入口）
５ 排出管（排出口）
５ａ 通気孔
６ 水吸引管
７ 凹部
S silencer space 1 silencer body 2 inner cylinder 2a vent 3 sound absorbing material 4 suction pipe (suction port)
5 discharge pipe (discharge port)
5a Vent hole 6 Water suction pipe 7 Recess

Claims (6)

吸入口から消音器本体内にガスが圧入され、当該消音器本体内の消音空間に配置された吸音材で吸音した後に排出口からガスを排出する消音器構造において、
上記消音空間を構成する側壁全周と吸音材との間に空間を形成し、上記吸入口から圧入されたガスを旋回流に整流して上記側壁と吸音材との間を通過させる気流調整手段を備えることを特徴とする消音器構造。 In the silencer structure in which gas is injected from the suction port into the silencer body and the sound is absorbed by the sound absorbing material disposed in the silencer body in the silencer body, and then the gas is discharged from the discharge port.
Airflow adjusting means that forms a space between the entire side wall of the silencing space and the sound absorbing material, rectifies the gas press-fitted from the suction port into a swirling flow, and passes between the side wall and the sound absorbing material A silencer structure characterized by comprising: 上記消音空間は、所定の軸方向に沿って延びると共に、軸直方向の断面形状が円形であることを特徴とする請求項１に記載した消音器構造。   The silencer structure according to claim 1, wherein the silencer space extends along a predetermined axial direction and has a circular cross-sectional shape in a direction perpendicular to the axis. 上記消音空間は、所定の軸方向に沿って延びると共に、上記側壁と吸音材との間に形成される空間は、上記吸入口から離れるにつれて軸直方向の断面積が小さくなっていることを特徴とする請求項１又は請求項２に記載した消音器構造。   The silencing space extends along a predetermined axial direction, and the space formed between the side wall and the sound absorbing material has a cross-sectional area in the axial direction that decreases as the distance from the suction port increases. The silencer structure according to claim 1 or 2. 上記消音空間を構成する側壁面に複数の凹凸を設けたことを特徴とする請求項１〜請求項３のいずれか１項に記載した消音器構造。   The silencer structure according to any one of claims 1 to 3, wherein a plurality of projections and depressions are provided on a side wall surface constituting the silencing space. 上記排出口は、上記消音空間と外部とを連通する管路であり、消音空間の下部と上記管路の側面とを連通する水吸引管を設けたことを特徴とする請求項１〜請求項４のいずれか１項に記載した消音器構造。   The discharge port is a conduit that communicates the silencing space with the outside, and a water suction tube that communicates a lower portion of the silencing space and a side surface of the conduit is provided. The silencer structure described in any one of 4 above. 上記消音空間は、所定の軸方向に沿って延びると共に、その軸の中心側に且つ当該軸に沿って延びるように吸音材を配置し、且つその吸音材を中空体とし、上記側壁と吸音材との間を旋回流状態で通過したガスを、吸音材の内側空間に導入し通過させてから排出することを特徴とする請求項１〜請求項５のいずれか１項に記載した消音器構造。   The sound deadening space extends along a predetermined axial direction, and a sound absorbing material is disposed on the center side of the shaft so as to extend along the axis. The sound absorbing material is a hollow body, and the side wall and the sound absorbing material are arranged. The muffler structure according to any one of claims 1 to 5, wherein the gas that has passed through in a swirling flow state is introduced into and passed through the inner space of the sound absorbing material, and then discharged. .
JP2004344390A 2004-11-29 2004-11-29 Silencer structure Expired - Fee Related JP4586513B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018044447A (en) * 2016-09-12 2018-03-22 マツダ株式会社 Engine exhaust muffler
CN112938639A (en) * 2021-01-30 2021-06-11 江苏首华智能装备有限公司 Fiber filling system for cylinder

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JPS6084172A (en) * 1983-06-01 1985-05-13 Masuo Yamamoto Induction rotary type centrifugal separator
JPS62617A (en) * 1985-06-26 1987-01-06 Yamaha Motor Co Ltd Exhaust muffler for internal-combustion engine
JPS6282215A (en) * 1985-10-04 1987-04-15 Yamaha Motor Co Ltd Exhaust muffler for engine-driven heat pump
JPH0521122U (en) * 1991-09-04 1993-03-19 株式会社三五 Drainer in silencer
JPH10508356A (en) * 1994-11-08 1998-08-18 ハプスブルク ロートリンゲン レオポルト Combined resonator and silencer device
JP2001501269A (en) * 1996-09-30 2001-01-30 シレントーア ノトックス アクティーゼルスカブ Gas flow silencer
JP2001317352A (en) * 2000-05-10 2001-11-16 Yoshihiro Shiotani Exhaust muffler
JP2004285969A (en) * 2003-03-25 2004-10-14 Sakamoto Industry Co Ltd Muffler for internal combustion engine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6084172A (en) * 1983-06-01 1985-05-13 Masuo Yamamoto Induction rotary type centrifugal separator
JPS62617A (en) * 1985-06-26 1987-01-06 Yamaha Motor Co Ltd Exhaust muffler for internal-combustion engine
JPS6282215A (en) * 1985-10-04 1987-04-15 Yamaha Motor Co Ltd Exhaust muffler for engine-driven heat pump
JPH0521122U (en) * 1991-09-04 1993-03-19 株式会社三五 Drainer in silencer
JPH10508356A (en) * 1994-11-08 1998-08-18 ハプスブルク ロートリンゲン レオポルト Combined resonator and silencer device
JP2001501269A (en) * 1996-09-30 2001-01-30 シレントーア ノトックス アクティーゼルスカブ Gas flow silencer
JP2001317352A (en) * 2000-05-10 2001-11-16 Yoshihiro Shiotani Exhaust muffler
JP2004285969A (en) * 2003-03-25 2004-10-14 Sakamoto Industry Co Ltd Muffler for internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018044447A (en) * 2016-09-12 2018-03-22 マツダ株式会社 Engine exhaust muffler
CN112938639A (en) * 2021-01-30 2021-06-11 江苏首华智能装备有限公司 Fiber filling system for cylinder

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