JP2001280114A - Muffler - Google Patents
MufflerInfo
- Publication number
- JP2001280114A JP2001280114A JP2000094181A JP2000094181A JP2001280114A JP 2001280114 A JP2001280114 A JP 2001280114A JP 2000094181 A JP2000094181 A JP 2000094181A JP 2000094181 A JP2000094181 A JP 2000094181A JP 2001280114 A JP2001280114 A JP 2001280114A
- Authority
- JP
- Japan
- Prior art keywords
- inner cylinder
- outer cylinder
- surface portion
- holes
- arc guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Exhaust Silencers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、各種の空圧機器か
ら排出される圧縮空気の排気音を低減するための消音器
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silencer for reducing exhaust noise of compressed air discharged from various pneumatic devices.
【0002】[0002]
【従来の技術】圧縮空気を利用して作動させる各種の空
圧機器にあって、排気等の際に排出口で大きな鳴音が発
生し、作業環境を低下させる場合があり、この騒音対策
として該排出口に、消音器が取付けられる。2. Description of the Related Art In various types of pneumatic equipment operated by using compressed air, a loud noise is generated at an outlet at the time of exhaustion and the like, which may lower the working environment. A muffler is attached to the outlet.
【0003】ところで、このような用途に用いられる消
音器は、一般的に、多孔質吸音材や繊維系吸音材を容器
内に収納して、鳴音を各吸音材で吸収してなるものが一
般的である。例えば、前者にあっては、実開昭56−1
61110号、実開平3−104116号、後者にあっ
ては、実開昭55−25624号、特開平6−2632
2号等で開示されている。[0003] By the way, a silencer used for such an application generally has a structure in which a porous sound absorbing material or a fiber-based sound absorbing material is housed in a container, and the sound is absorbed by each sound absorbing material. General. For example, in the case of the former,
No. 61110, Japanese Utility Model Application Laid-Open No. 3-104116, and in the latter case, Japanese Utility Model Application Laid-Open No. 55-25624,
No. 2 and the like.
【0004】[0004]
【発明が解決しようとする課題】ところで、かかる空圧
機器の排気口から噴出する圧縮空気は、配管内に侵入し
た湿分、シリンダ潤滑油の油ミスト、塵芥等が混入して
おり、圧縮空気が吸音材を透過すると、これらの成分が
吸音材の多孔質又は繊維の微細流通孔内に残留して目詰
まりを発生させ易い。従って、長期間放置しておくと、
かかる目詰まりにより有効流通面積が減少し、大きな負
荷がかかって、空圧機器の作動不良の原因となる。ま
た、繊維材からなる吸音材を用いた場合には、水分や油
による劣化も問題となる。このため、耐用寿命が短く、
比較的短期間に消音器を交換する必要があった。しかも
筒状保持容器内に、吸音材を装着する構成であるため、
単価が高いだけでなく、構造が複雑なため、殆どの構造
が、吸音材の交換が不能で、消音器ごと油で汚れたまま
廃棄処分しなければならず不経済であり、かつ環境汚染
の問題もあった。このように、従来の吸音材を用いた消
音器は、耐用寿命が短く、保守管理が面倒であり、管理
コストが高価となるという問題があった。The compressed air ejected from the exhaust port of such a pneumatic device contains moisture invading the piping, oil mist of cylinder lubricating oil, dust, etc., and is compressed air. When, penetrates the sound absorbing material, these components remain in the porous material of the sound absorbing material or in the fine flow holes of the fibers, and are likely to cause clogging. Therefore, if left for a long time,
Such clogging reduces the effective flow area, applies a large load, and causes malfunction of the pneumatic device. In addition, when a sound absorbing material made of a fiber material is used, deterioration due to moisture or oil also becomes a problem. For this reason, the service life is short,
It was necessary to replace the silencer in a relatively short time. Moreover, since the sound absorbing material is installed in the cylindrical holding container,
Not only is the unit price high, but also the structure is complicated, so most of the structures cannot be replaced with sound absorbing material, and the silencer must be disposed of with the oil contaminated, which is uneconomical and environmentally friendly. There were also problems. As described above, the conventional silencer using the sound absorbing material has a problem that the service life is short, the maintenance is complicated, and the management cost is high.
【0005】本発明は、このような、経時使用による目
詰まりや、劣化がなく、しかも構造が簡単で、排気口の
消音に最適な消音器を提供することを目的とするもので
ある。It is an object of the present invention to provide a silencer which is free from such clogging and deterioration due to use over time, has a simple structure, and is optimal for silencing an exhaust port.
【0006】[0006]
【課題を解決するための手段】本発明は、円弧案内面部
と長手方向に沿った扁平面部とが周方向に連成され、該
扁平面部に多数の微小噴出孔が形成された有底状の外筒
と、該外筒内に挿入され、円弧案内面部に対向する側縁
に、複数の流出孔が長手方向に沿って列成され、前端を
エアー流入口としてなる有底状の内筒とを備え、内筒と
外筒との間に、流出孔と微小噴出孔とに連通する圧縮空
気の旋回周隙が形成されていることを特徴とする消音器
である。(請求項1の手段)According to the present invention, there is provided a bottomed bottom in which an arc guide surface portion and a flat surface portion extending in a longitudinal direction are coupled in a circumferential direction, and a large number of minute ejection holes are formed in the flat surface portion. An outer cylinder, a bottomed inner cylinder that is inserted into the outer cylinder and has a plurality of outflow holes arranged in a longitudinal direction at a side edge facing the arc guide surface portion, the front end serving as an air inlet. And a swirl space of compressed air is formed between the inner cylinder and the outer cylinder to communicate with the outflow hole and the minute ejection hole. (Means of claim 1)
【0007】かかる構成にあって、エアー流入口を空圧
機器の排気口に接続する。これにより圧縮空気は、エア
ー流入口から内筒に流入し、流出孔から旋回周隙に流出
し、さらに円弧案内面部に案内されて、外筒の扁平面部
に形成された多数の微小噴出孔から噴出する。(請求項
1の作用)In such a configuration, the air inlet is connected to the outlet of the pneumatic device. As a result, compressed air flows into the inner cylinder from the air inlet, flows out of the outflow hole into the swirling space, is further guided by the arc guide surface portion, and flows out from the numerous minute ejection holes formed in the flat surface portion of the outer cylinder. Gushing. (Operation of Claim 1)
【0008】この流動過程にあって、内筒内は空洞のた
め、ヘルムホルツ共振器を構成し、空気を激しく振動さ
せて、音のエネルギを吸収する。すなわち内筒は、共鳴
型消音器としての作用を奏する。また、この消音作用を
受けた圧縮空気は、該流出孔から旋回周隙側で膨張し、
かつ円弧案内面部の案内作用により、周方向への旋回流
となる。ところで、この旋回周隙は整一な円環状ではな
く、扁平面部を有するから、外側の旋回流は該扁平面部
の内面に衝突して跳ね返る。このように、該扁平面部に
より圧縮空気は、多様な流動を生じるため、音波が相互
に干渉し合い、いわゆる干渉型消音器の作用を生ずる。
そして、圧縮空気は、干渉し合いながら、音圧を低減さ
せて、微小噴出孔から噴出することとなる。而して、か
かる構成の消音器は共鳴型消音器,干渉型消音器の各作
用を生じることにより、有効に鳴音を減少させることが
できる。In this flow process, since the inside of the inner cylinder is hollow, a Helmholtz resonator is formed, vibrating air violently and absorbing sound energy. That is, the inner cylinder functions as a resonance type silencer. Also, the compressed air subjected to this silencing action expands from the outflow hole on the side of the swirling gap,
In addition, a swirling flow in the circumferential direction is generated by the guiding action of the arc guide surface portion. By the way, since the swirling gap has a flat surface portion instead of a uniform annular shape, the outer swirling flow collides with the inner surface of the flat surface portion and rebounds. As described above, since the compressed air causes various flows due to the flat surface portion, the sound waves interfere with each other, so that a so-called interference type silencer operates.
Then, the compressed air is ejected from the minute ejection holes while reducing the sound pressure while interfering with each other. Thus, the silencer having such a configuration can effectively reduce the sound generation by producing the actions of the resonance type silencer and the interference type silencer.
【0009】かかる構成にあって、外筒の上下に多数の
微小噴出孔が形成された扁平面部を備え、内筒の両側縁
に複数の流出孔を長手方向に沿って列成することができ
る。(請求項2の手段)In such a configuration, a flat surface portion having a large number of minute ejection holes formed on the upper and lower sides of the outer cylinder is provided, and a plurality of outflow holes can be arranged along the longitudinal direction on both side edges of the inner cylinder. . (Means of Claim 2)
【0010】このように外筒の上下に扁平面部を形成
し、内筒の流出孔列を左右に形成することにより、各流
出孔から流出した圧縮空気は、外筒の円弧案内面部の案
内作用により、上下の扁平面部に向けて二分され、逆方
向の旋回流となる。このため、旋回周隙内で旋回流相互
が衝突し、かつ該扁平面部での反射を繰り返すことによ
り、相互に干渉し合い、音エネルギの損失を大きく生じ
て、消音効果が向上する。(請求項2の作用)In this manner, by forming the flat portions on the upper and lower sides of the outer cylinder and forming the rows of outflow holes of the inner cylinder on the left and right, the compressed air flowing out of each of the outflow holes is guided by the arc guide surface of the outer cylinder. As a result, the flow is bisected toward the upper and lower flat portions, and the swirl flows in opposite directions. For this reason, the swirling flows collide with each other in the swirling gap and are repeatedly reflected by the flat surface portion, thereby interfering with each other, causing a large loss of sound energy, and improving the sound deadening effect. (Function of Claim 2)
【0011】ここで、内筒の長手方向に沿って列成した
流出孔を、奥端方向に向けて序々に径小となるようにす
ることができる(請求項3の手段)。Here, the outflow holes arranged along the longitudinal direction of the inner cylinder can be gradually reduced in diameter toward the far end.
【0012】すなわち、圧縮空気は、エアー流入口から
内筒に沿って流出し、その奥端の底部にぶつかって、各
流出孔から環状周囲隙間に流出する。このため内筒が長
尺方向に沿って同径である場合には、奥底に近い程流出
孔からの噴出量が多くなる傾向にある。そこで、奥底に
近いほど流出孔を小さくし、これにより、各流出孔から
の流量を可及的に等しくさせ、内筒の側縁から長尺方向
に沿って、均等に圧縮空気を噴出させる。これにより、
長尺方向に沿って、均等に消音効果を生じさせることが
可能となる。(請求項3の作用)That is, the compressed air flows out from the air inlet along the inner cylinder, hits the bottom of the inner end thereof, and flows out from each outlet hole into the annular peripheral gap. For this reason, when the inner cylinder has the same diameter in the longitudinal direction, the ejection amount from the outflow hole tends to increase as the inner cylinder approaches the bottom. Therefore, the outflow holes are made smaller as they are closer to the inner bottom, so that the flow rates from each outflow hole are made as equal as possible, and compressed air is jetted uniformly from the side edge of the inner cylinder along the longitudinal direction. This allows
A silencing effect can be evenly generated along the long direction. (Function of Claim 3)
【0013】[0013]
【発明の実施の形態】添付図面に従って、本発明の一実
施例を説明する。図1〜4で示すように、本発明の消音
器1は、外筒2内に内筒14が挿入されて構成される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 to 4, the silencer 1 of the present invention is configured by inserting an inner cylinder 14 into an outer cylinder 2.
【0014】ここで、外筒2は、図5,6で示すよう
に、有底状を呈し、その上下に扁平面部4,4が形成さ
れ、該扁平面部4,4間に円弧案内面部6,6が形成さ
れる。この扁平面部4,4には、内径が1.2mm程度
の微細な微小噴出孔7が、縦横に多数個形成される。こ
の外筒2は奥底部9により奥端が遮蔽され、かつその中
心に連結孔10が形成される。また、前端は開口し、内
筒14の挿入口端となっている。Here, as shown in FIGS. 5 and 6, the outer cylinder 2 has a bottomed shape, and flat surface portions 4 and 4 are formed on the upper and lower sides thereof, and the arc guide surface portion 6 is provided between the flat surface portions 4 and 4. , 6 are formed. A large number of fine minute ejection holes 7 having an inner diameter of about 1.2 mm are formed in the flat plane portions 4 and 4 in the vertical and horizontal directions. The outer cylinder 2 is shielded at the back end by a back bottom portion 9 and has a connection hole 10 formed at the center thereof. Further, the front end is open and serves as an insertion end of the inner cylinder 14.
【0015】外筒2の具体例としては、雄螺子突部18
のネジサイズR3/8(管用テーパネジ)、円弧案内面
部6,6の外径26mm及び内径22mm、扁平面部
4,4間の外寸法20mm及び内寸法は16mm、かつ
長さ69mmのものが例示される(これは単なる設計例
に過ぎない。)A specific example of the outer cylinder 2 is a male screw projection 18.
Thread size R3 / 8 (taper thread for pipes), outer diameter 26 mm and inner diameter 22 mm of arc guide surfaces 6, 6, outer dimension 20 mm and inner dimensions between flat plane parts 4, 4 are 16 mm, and length is 69 mm. (This is only a design example.)
【0016】この外筒2に挿入される内筒14は、図7
で示すように、奥底部16を有する先細状の有底状円筒
形を呈し、内側を内空15としている。また、前端は開
口されてエアー流入口21となる。この前端部の周縁に
は、外筒2の前端開口を封鎖する封止鍔部17(図3参
照)が形成され、さらに空圧機器の排気孔に螺合する雄
螺子突部18が形成されている。また、内筒14の奥底
部16には螺子込み孔19が形成される。The inner cylinder 14 inserted into the outer cylinder 2 is shown in FIG.
As shown by, it has a tapered bottomed cylindrical shape having a deep bottom portion 16, and the inside is an inner space 15. The front end is opened to serve as an air inlet 21. A sealing flange 17 (see FIG. 3) for closing the opening of the front end of the outer cylinder 2 is formed on the peripheral edge of the front end, and a male screw projection 18 that is screwed into the exhaust hole of the pneumatic device is formed. ing. A screw hole 19 is formed in the inner bottom portion 16 of the inner cylinder 14.
【0017】さらに、内筒14の両側面には、円弧案内
面部6,6の中央部に対向する左右縁位置で、長手方向
に沿って、複数の流出孔20が形成される。この流出孔
20は、奥底方向に向けて序々に径小となるようにして
いる。また内筒14は少し先細状となっている。Further, a plurality of outflow holes 20 are formed on both side surfaces of the inner cylinder 14 along the longitudinal direction at left and right edge positions facing the center of the arc guide surface portions 6, 6. The diameter of the outflow hole 20 is gradually reduced in the depth direction. The inner cylinder 14 is slightly tapered.
【0018】この内筒14の寸法例を示すと、雄螺子突
部18を除いた外筒2内に挿入される長さは67mmで
あり、内筒14を、外筒2内に、奥底部16の外面が奥
底部9の内面に当接し、かつ封止鍔部17が外筒2の前
端開口に嵌入する位置まで挿入した後、図1に示す連結
孔10から連結螺子30を、図2に示す螺子込み孔19
に螺入し、外筒2と内筒14とが連結される。そして、
かかる連結状態にあって、外筒2の内面と、内筒14の
外面間には旋回周隙25が形成されることとなる。As an example of the dimensions of the inner cylinder 14, the length inserted into the outer cylinder 2 excluding the male screw projection 18 is 67 mm. After the outer surface of the outer cylinder 16 is brought into contact with the inner surface of the inner bottom portion 9 and the sealing flange 17 is inserted into a position where it fits into the front end opening of the outer cylinder 2, the connecting screw 30 is inserted through the connecting hole 10 shown in FIG. Screw hole 19 shown
And the outer cylinder 2 and the inner cylinder 14 are connected. And
In such a connected state, a turning gap 25 is formed between the inner surface of the outer cylinder 2 and the outer surface of the inner cylinder 14.
【0019】次にかかる構成の作用につき説明する。空
圧機器の排気口に、図2に示すように、消音器1の雄螺
子突部18を螺合してエアー流入口21を該排気口と接
続する。これにより空圧機器から排出される圧縮空気
は、エアー流入口21から内筒14内に流入し、該内筒
14の両側縁で長手方向に沿った複数の流出孔20から
旋回周隙25に流出し、さらに図4に示すように、外筒
2の円弧案内面部6,6の内面に案内されてて、外筒2
の扁平面部4,4に形成された多数の微小噴出孔7から
噴出する。Next, the operation of the above configuration will be described. As shown in FIG. 2, the male screw projection 18 of the silencer 1 is screwed into the exhaust port of the pneumatic device, and the air inlet 21 is connected to the exhaust port. As a result, the compressed air discharged from the pneumatic device flows into the inner cylinder 14 from the air inlet 21, and from the plurality of outflow holes 20 along the longitudinal direction on both side edges of the inner cylinder 14 to the swirling gap 25. As shown in FIG. 4, the fluid flows out and is guided by the inner surfaces of the arc guide surfaces 6 and 6 of the outer cylinder 2.
Are ejected from a large number of minute ejection holes 7 formed in the flat surface portions 4 and 4.
【0020】この流動過程にあって、内筒14に圧入さ
れた圧縮空気は、内空15から流出孔20を介して、旋
回周隙25側へ噴出することとなる。このため、内筒1
4が、その内部を空洞とするヘルムホルツ共振器と等価
となり、空気を激しく振動させて、音のエネルギを吸収
することとなる共鳴型消音器としての作用を生ずる。ま
た、この消音作用を受けた圧縮空気はさらに、該流出孔
20から旋回周隙25で膨張し、かつ円弧案内面部6,
6の案内作用により、図4矢線で示すように、上下で二
分されて、周方向への逆方向の旋回流α,βとなる。In this flow process, the compressed air press-fitted into the inner cylinder 14 is ejected from the inner space 15 through the outflow hole 20 to the swirl gap 25 side. For this reason, the inner cylinder 1
4 is equivalent to a Helmholtz resonator having a hollow inside, and vibrates the air violently to produce an action as a resonance type silencer that absorbs sound energy. Further, the compressed air subjected to the noise reduction function further expands from the outflow hole 20 in the swirl space 25 and further has an arc guide surface portion 6.
As shown by the arrow in FIG. 4, the guide action 6 divides the upper and lower halves into swirling flows α and β in opposite directions in the circumferential direction.
【0021】ところで、この旋回周隙25は整一な円環
状ではなく、上下に扁平面部4,4を有するから、外側
の旋回流は該扁平面部4,4の内面に衝突して跳ね返
り、乱流となる。このため圧縮空気は、多様な流動を生
じて、音波が相互に干渉し合う。しかも上下で二分され
た逆方向の旋回流α,βを生じているから、旋回流α,
βが相互に衝突することとなり、音エネルギの損失を生
じて、いわゆる干渉型消音器の作用を奏する。而して、
かかる消音器1は、共鳴型消音器,干渉型消音器の各作
用を生じることにより、有効に鳴音を減少させることが
できる。Incidentally, since the swirling gap 25 is not a uniform annular shape but has upper and lower flat portions 4, 4, the outer swirling flow collides with the inner surfaces of the flat portions 4, bounces off, and is disturbed. It becomes a flow. Therefore, the compressed air generates various flows, and the sound waves interfere with each other. Moreover, since the swirling flows α and β in the opposite directions, which are divided into upper and lower parts, are generated, the swirling flows α and β
β collide with each other, resulting in a loss of sound energy, thus exhibiting the function of a so-called interference type silencer. Thus,
The silencer 1 can effectively reduce the sound generation by producing the respective functions of the resonance type silencer and the interference type silencer.
【0022】一方、図2に示すように、内筒14の長手
方向に沿って列成した流出孔20は、奥底方向に向けて
序々に径小となるようにしている。すなわち、圧縮空気
は、エアー流入口21から内筒に沿って流入し、その奥
底にぶつかって、各流出孔20から旋回周隙25に流出
するため、内筒14が長尺方向に沿って同径である場合
には、図2の矢線群xで示すように、奥底に近い程流出
孔20からの噴出量が多くなる傾向にある。そこで、奥
底に近いほど流出孔20の径を小さくし、これにより、
図2の矢線群yで示すように、各流出孔20からの流量
を可及的に等しくさせ、内筒14の側縁から長尺方向に
沿って、均等に圧縮空気を噴出させている。これによ
り、長尺方向に沿って、均等に消音効果を生じさせるこ
とが可能となる。On the other hand, as shown in FIG. 2, the outflow holes 20 arranged along the longitudinal direction of the inner cylinder 14 are gradually reduced in diameter toward the bottom. That is, the compressed air flows in from the air inlet 21 along the inner cylinder, hits the inner bottom thereof, and flows out from each of the outflow holes 20 to the swirl gap 25, so that the inner cylinder 14 extends in the longitudinal direction. In the case of a diameter, as shown by an arrow group x in FIG. 2, the ejection amount from the outflow hole 20 tends to increase as it is closer to the bottom. Therefore, the diameter of the outflow hole 20 is made smaller as it is closer to the inner bottom,
As shown by the arrow group y in FIG. 2, the flow rate from each of the outlet holes 20 is made as equal as possible, and the compressed air is jetted uniformly from the side edge of the inner cylinder 14 along the longitudinal direction. . Thereby, it is possible to uniformly generate a noise-reducing effect along the long direction.
【0023】表1は、上述した設計寸法例にあって、か
つ微小噴出孔7の内径寸法及び数(φ1.2mm−88
個,φ1.0mm−128個の二種)のみを変化させ
て、外筒2と内筒14とを組み付けて構成した消音器1
と、焼結材料からなる多孔質吸音材を用いた従来の市販
消音器(AN300)とを比較したものである。ここ
で、騒音は、エアーシリンダのソレノイドバルブ排気口
に夫々消音器を取付け、該排気口から発生する騒音を、
積分形普通騒音計で計測し、その発生出力をアナライジ
ングレコーダで測定し、排気騒音圧をその出力波形から
算出した。Table 1 shows the above-mentioned example of the design dimensions, and also shows the inner diameter and number (φ1.2 mm-88) of the minute ejection holes 7.
Muffler 1 constructed by assembling the outer cylinder 2 and the inner cylinder 14 by changing only the
And a conventional commercially available silencer (AN300) using a porous sound absorbing material made of a sintered material. Here, the noise is attached to the exhaust valve of the solenoid valve of the air cylinder, respectively, silencers attached, noise generated from the exhaust port,
The output was measured by an integrating recorder and the generated output was measured by an analyzing recorder, and the exhaust noise pressure was calculated from the output waveform.
【0024】[0024]
【表1】 [Table 1]
【0025】ここで、消音器を適用しない場合には、バ
ルブ排気口からの排気騒音圧(dB)は約100dBであ
った。また有効断面積は、シリンダ内が所定圧力にまで
に低下する時間を計測し、これを仮想的な空気の排出口
の開口面積に換算したものである。この値が大きけれ
ば、通気抵抗が小さく、空気の排出処理量が大きいこと
になる。Here, when the silencer was not used, the exhaust noise pressure (dB) from the valve exhaust port was about 100 dB. The effective sectional area is obtained by measuring the time required for the inside of the cylinder to decrease to a predetermined pressure and converting the measured time into the virtual opening area of the air outlet. If this value is large, the airflow resistance is small, and the air discharge processing amount is large.
【0026】この表1で明らかなように、本発明品は、
従来の消音器とほぼ同じ排気騒音圧となる。また、有効
断面積も、ほぼ同じであり、かつ、微小噴出孔7の内径
寸法及び数を適宜に選定することにより、所望の特性に
調整可能であることも解る。As apparent from Table 1, the product of the present invention
The exhaust noise pressure is almost the same as that of the conventional silencer. It is also understood that the effective cross-sectional areas are almost the same, and that the desired characteristics can be adjusted by appropriately selecting the inner diameter and the number of the minute ejection holes 7.
【0027】上述の構成は、外筒2の上下に扁平面部
4,4を形成し、内筒14の左右に流出孔20の列を形
成して、円弧案内面部6に対向するようにしたものであ
るが、この扁平面部4は単一でも良く、流出孔20列
と、円弧案内面部6との離間角度は適宜に選定すること
ができる。In the above-described configuration, the flat portions 4 and 4 are formed on the upper and lower sides of the outer cylinder 2 and the rows of the outflow holes 20 are formed on the left and right of the inner cylinder 14 so as to face the arc guide surface section 6. However, the flat portion 4 may be single, and the separation angle between the 20 rows of outflow holes and the arc guide surface portion 6 can be appropriately selected.
【0028】[0028]
【発明の効果】本発明の消音器は、円弧案内面部と長手
方向に沿った扁平面部を備え、かつ該扁平面部に多数の
微小噴出孔が形成された外筒内に、複数の流出孔を長手
方向に沿って列成した内筒を挿入し、該流出孔列を円弧
案内面部に対向させ、内筒と外筒との間に、流出孔と微
小噴出孔とに連通する圧縮空気の旋回周隙が形成したも
のであるから、内筒自体が、共鳴型消音器としての作用
を有し、しかも流出孔から流出した圧縮空気は、旋回周
隙側で膨張し、円弧案内面部の案内作用により、周方向
への旋回流となって、扁平面部に衝突し、これにより音
波が相互に干渉し合って、いわゆる干渉型消音器の作用
を生ずることとなる。The silencer of the present invention has a circular arc guide surface and a flat surface along the longitudinal direction, and a plurality of outflow holes are formed in an outer cylinder having a large number of minute ejection holes formed in the flat surface. The inner cylinders arranged along the longitudinal direction are inserted, the outflow hole row is opposed to the arc guide surface portion, and the swirling of the compressed air communicating between the outflow holes and the minute ejection holes is provided between the inner cylinder and the outer cylinder. Because the gap is formed, the inner cylinder itself has the function of a resonance type silencer, and the compressed air that has flowed out of the outlet hole expands on the side of the swirling gap to guide the arc guide surface. As a result, a swirling flow in the circumferential direction collides with the flat surface portion, thereby causing sound waves to interfere with each other, thereby producing a so-called interference type silencer.
【0029】このため、消音効果が高く、しかも吸音材
を有しないから該吸音材の目詰まりによる交換が不要で
あるため、耐久性が良好となる。また、微小噴出孔又は
流出孔に目詰まりを生じても、洗浄により、再使用が可
能となる。さらには、構造が単純であり、かつ合成樹脂
材料の射出成形等により容易に形成でき、製造が容易で
低廉となる。(請求項1の効果)As a result, the sound absorbing effect is high, and since there is no sound absorbing material, it is not necessary to replace the sound absorbing material due to clogging, thereby improving the durability. Further, even if the minute ejection holes or the outflow holes are clogged, it can be reused by washing. Furthermore, the structure is simple, and it can be easily formed by injection molding of a synthetic resin material or the like, so that it is easy and inexpensive to manufacture. (Effect of Claim 1)
【0030】また、かかる構成にあって、外筒の上下に
多数の微小噴出孔が形成された扁平面部を備え、内筒の
両側縁に複数の流出孔を長手方向に沿って列成するよう
にした場合には、各流出孔から流出した圧縮空気は、外
筒の円弧案内面部の案内作用により、上下の扁平面部に
向けて二分され、逆方向の旋回流となり、旋回周隙内で
旋回流相互が衝突し、かつ該扁平面部での反射を繰り返
すことにより、相互に干渉し合い、音エネルギの損失を
生じて、消音効果が向上する。(請求項2の効果)Further, in such a configuration, a flat surface portion having a large number of minute ejection holes formed on the upper and lower sides of the outer cylinder is provided, and a plurality of outflow holes are arranged along the longitudinal direction on both side edges of the inner cylinder. In this case, the compressed air flowing out of each outlet hole is bisected toward the upper and lower flat portions by the guiding action of the arc guide surface portion of the outer cylinder, and becomes a swirling flow in the opposite direction, and swirls in the swirling space. When the streams collide with each other and are repeatedly reflected on the flat surface portion, the streams mutually interfere with each other, resulting in a loss of sound energy, thereby improving the sound deadening effect. (Effect of Claim 2)
【0031】さらにまた、かかる構成にあって、内筒の
長手方向に沿って列成した流出孔を、奥底方向に向けて
序々に径小となるようにした場合には、各流出孔からの
流量を可及的に等しくさせ、内筒の側縁から長尺方向に
沿って、均等に圧縮空気を噴出させることができ、これ
により、長尺方向に沿って、均等に消音効果を生ずる。
(請求項3の効果)Further, in such a configuration, when the outflow holes arranged along the longitudinal direction of the inner cylinder are gradually reduced in diameter toward the depth bottom, the outflow holes from each of the outflow holes are formed. The flow rate can be made as equal as possible, and the compressed air can be jetted out uniformly from the side edge of the inner cylinder along the elongate direction, thereby producing a silencing effect evenly along the elongate direction.
(Effect of Claim 3)
【図1】本発明の消音器1の側面図である。FIG. 1 is a side view of a muffler 1 according to the present invention.
【図2】本発明の消音器1の縦断正面図である。FIG. 2 is a longitudinal sectional front view of the muffler 1 of the present invention.
【図3】本発明の消音器1の横断平面図である。FIG. 3 is a cross-sectional plan view of the muffler 1 of the present invention.
【図4】本発明の消音器1の縦断側面図である。FIG. 4 is a longitudinal sectional side view of the muffler 1 of the present invention.
【図5】外筒2の縦断正面図である。5 is a vertical sectional front view of the outer cylinder 2. FIG.
【図6】外筒2の縦断側面図である。6 is a vertical side view of the outer cylinder 2. FIG.
【図7】内筒14の縦断正面図である。7 is a vertical sectional front view of the inner cylinder 14. FIG.
1 消音器 2 外筒 4,4 扁平面部 6,6 円弧案内面部 7 微小噴出孔 14 内筒 20 流出孔 21 エアー流入口 25 旋回周隙 DESCRIPTION OF SYMBOLS 1 Silencer 2 Outer cylinder 4,4 Flat surface part 6,6 Circular guide surface part 7 Micro ejection hole 14 Inner cylinder 20 Outflow hole 21 Air inlet 25 Swirling gap
Claims (3)
とが周方向に連成され、該扁平面部に多数の微小噴出孔
が形成された有底状の外筒と、該外筒内に挿入され、円
弧案内面部に対向する側縁に、複数の流出孔が長手方向
に沿って列成され、前端をエアー流入口としてなる有底
状の内筒とを備え、内筒と外筒との間に、流出孔と微小
噴出孔とに連通する圧縮空気の旋回周隙が形成されてい
ることを特徴とする消音器。1. A bottomed outer cylinder in which a circular arc guide surface portion and a flat surface portion extending in the longitudinal direction are coupled in a circumferential direction, and a plurality of minute ejection holes are formed in the flat surface portion; A plurality of outflow holes are arranged along the longitudinal direction at a side edge facing the arc guide surface portion, and a bottomed inner cylinder having a front end serving as an air inlet is provided, and an inner cylinder and an outer cylinder are provided. Wherein a swirling circumferential space of the compressed air communicating with the outflow hole and the fine ejection hole is formed between the muffler and the air outlet.
た扁平面部を備え、内筒の両側縁に複数の流出孔を長手
方向に沿って列成したことを特徴とする請求項1記載の
消音器。2. A method according to claim 1, further comprising a flat surface portion having a plurality of minute ejection holes formed on the upper and lower sides of the outer cylinder, and a plurality of outflow holes arranged on both side edges of the inner cylinder along a longitudinal direction. 1. The muffler according to 1.
を、奥端方向に向けて序々に径小となるようにしたこと
を特徴とする請求項1又は請求項2記載の消音器。3. The silencer according to claim 1, wherein the outflow holes arranged along the longitudinal direction of the inner cylinder are gradually reduced in diameter toward the back end. vessel.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000094181A JP2001280114A (en) | 2000-03-30 | 2000-03-30 | Muffler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000094181A JP2001280114A (en) | 2000-03-30 | 2000-03-30 | Muffler |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2001280114A true JP2001280114A (en) | 2001-10-10 |
Family
ID=18609267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000094181A Pending JP2001280114A (en) | 2000-03-30 | 2000-03-30 | Muffler |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2001280114A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005304860A (en) * | 2004-04-22 | 2005-11-04 | Ikiken:Kk | Oxygen concentrator |
JP2008212206A (en) * | 2007-02-28 | 2008-09-18 | Terumo Corp | Oxygen concentrator |
JP2010520509A (en) * | 2007-03-08 | 2010-06-10 | コリア ニューマティック システム カンパニー リミテッド | Silencer for pneumatic equipment |
WO2015199314A1 (en) * | 2014-06-25 | 2015-12-30 | 주식회사 포리얼 | Air intake/discharge device for noise reduction |
JP2018167059A (en) * | 2009-10-23 | 2018-11-01 | エア・ウォーター防災株式会社 | Fire-extinguishing gas injection device and gas fire-extinguishing equipment |
CN109173605A (en) * | 2018-09-10 | 2019-01-11 | 大唐环境产业集团股份有限公司 | A kind of hydrolysis of urea exhaust jacket eartridge collector |
JP2019012185A (en) * | 2017-06-30 | 2019-01-24 | 日本ドライケミカル株式会社 | Silencer, releasing device, quick open valve, fire extinguisher-housing container, and gas-based fire extinguishing system |
US11639676B2 (en) | 2019-06-17 | 2023-05-02 | Tenneco Automotive Operating Company Inc. | Vehicle exhaust system |
-
2000
- 2000-03-30 JP JP2000094181A patent/JP2001280114A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005304860A (en) * | 2004-04-22 | 2005-11-04 | Ikiken:Kk | Oxygen concentrator |
JP4520209B2 (en) * | 2004-04-22 | 2010-08-04 | 株式会社医器研 | Oxygen concentrator |
JP2008212206A (en) * | 2007-02-28 | 2008-09-18 | Terumo Corp | Oxygen concentrator |
JP2010520509A (en) * | 2007-03-08 | 2010-06-10 | コリア ニューマティック システム カンパニー リミテッド | Silencer for pneumatic equipment |
JP4954297B2 (en) * | 2007-03-08 | 2012-06-13 | コリア ニューマティック システム カンパニー リミテッド | Silencer for pneumatic equipment |
JP2018167059A (en) * | 2009-10-23 | 2018-11-01 | エア・ウォーター防災株式会社 | Fire-extinguishing gas injection device and gas fire-extinguishing equipment |
WO2015199314A1 (en) * | 2014-06-25 | 2015-12-30 | 주식회사 포리얼 | Air intake/discharge device for noise reduction |
JP2019012185A (en) * | 2017-06-30 | 2019-01-24 | 日本ドライケミカル株式会社 | Silencer, releasing device, quick open valve, fire extinguisher-housing container, and gas-based fire extinguishing system |
CN109173605A (en) * | 2018-09-10 | 2019-01-11 | 大唐环境产业集团股份有限公司 | A kind of hydrolysis of urea exhaust jacket eartridge collector |
CN109173605B (en) * | 2018-09-10 | 2024-06-04 | 大唐环境产业集团股份有限公司 | Sleeve type collector for urea hydrolysis waste gas |
US11639676B2 (en) | 2019-06-17 | 2023-05-02 | Tenneco Automotive Operating Company Inc. | Vehicle exhaust system |
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