JP3318368B2 - Silencer - Google Patents
SilencerInfo
- Publication number
- JP3318368B2 JP3318368B2 JP30257092A JP30257092A JP3318368B2 JP 3318368 B2 JP3318368 B2 JP 3318368B2 JP 30257092 A JP30257092 A JP 30257092A JP 30257092 A JP30257092 A JP 30257092A JP 3318368 B2 JP3318368 B2 JP 3318368B2
- Authority
- JP
- Japan
- Prior art keywords
- sound absorbing
- cylinder
- sound
- silencer
- cylinders
- 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.)
- Expired - Lifetime
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、送風機等から発生する
騒音（音波）を消音させる消音装置に係り、特に、大型
の送風機等の消音に好適な消音装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silencer for silencing noise (sound waves) generated from a blower or the like, and more particularly to a silencer suitable for silencing a large blower or the like.
【０００２】[0002]
【従来の技術】従来から送風機等から発生する音波を、
吸音筒を用いて消音させる消音装置として、各種の提案
がなされている。2. Description of the Related Art Conventionally, sound waves generated from a blower or the like are
Various proposals have been made as silencers for silencing using a sound absorbing cylinder.
【０００３】これらの従来例としては、実公昭４８−２
９２０１号公報、実公昭４９−１６５６４号公報、実開
平１−９５５１７号公報等にそれぞれ記載の消音装置が
ある。[0003] These conventional examples are disclosed in Japanese Utility Model Publication No. 48-2
Japanese Patent Application Laid-Open No. 9201, Japanese Utility Model Publication No. 49-16564, Japanese Utility Model Application Laid-Open No. 1-95517, etc. each have a muffler.
【０００４】前記実公昭４８−２９２０１号公報に記載
されている消音装置は、複数個の角形吸音筒を、ケーシ
ング内に波板状の間隔板を介して配置した構成とされて
いる。The muffler described in Japanese Utility Model Publication No. 48-29201 has a structure in which a plurality of rectangular sound absorbing cylinders are arranged in a casing with a corrugated spacing plate interposed therebetween.
【０００５】前記実公昭４９−１６５６４号公報に記載
されている消音装置は、複数個の角形吸音筒を、碁盤の
目状に積み重ね配置した構成とされている。The sound deadening device described in Japanese Utility Model Publication No. 49-16564 has a configuration in which a plurality of rectangular sound absorbing cylinders are stacked and arranged in a grid pattern.
【０００６】前記実開平１−９５５１７号公報に記載さ
れている消音装置は、複数個の円筒状吸音筒を、ジグザ
グあるいは碁盤の目状に積み重ねした構成とされてい
る。[0006] The sound deadening device described in Japanese Utility Model Laid-Open No. 1-95517 has a structure in which a plurality of cylindrical sound absorbing cylinders are stacked in a zigzag or grid pattern.
【０００７】[0007]
【発明が解決しようとする課題】ところで、現在では、
各種装置の高性能化、小型化、軽量化が常に図られてお
り、大容量かつ大型化する送風機等に用いる消音装置に
も、軽量かつ消音性能が高いものが望まれている。However, at present,
Higher performance, smaller size, and lighter weight of various types of devices are constantly being pursued, and lightweight and high noise reduction performance is also desired for a noise reduction device used for a blower or the like having a large capacity and a large size.
【０００８】しかしながら、前述した従来の各消音装置
においては、複数個の吸音筒を相互に近接させて密に配
置させているために、例えば１辺１０ｍの正方形断面の
ケーシング内に配置する案内筒の数が５０個程度とな
り、消音装置の重量が重くなるという問題点があった。However, in each of the above-described conventional silencers, since a plurality of sound absorbing cylinders are closely arranged close to each other, for example, a guide cylinder arranged in a casing having a square cross section of 10 m on a side. Is about 50, and the weight of the silencer is increased.
【０００９】また、前記実開平１−９５５１７号公報に
記載のように、複数個の円筒状の吸音筒をジグザグに積
み重ねるには、この積み重ね構造に適合する特殊形状の
ケーシングが必要となり、部品点数が増加するとともに
重量がさらに増加するという問題点があった。Further, as described in Japanese Utility Model Application Laid-Open No. 1-95517, in order to stack a plurality of cylindrical sound absorbing cylinders in a zigzag manner, a casing having a special shape suitable for this stacking structure is required. However, there is a problem that the weight further increases as the weight increases.
【００１０】また、従来の各消音装置においては、複数
個の吸音筒を近接させて密に配置させているために、複
数個の吸音筒が配置されるケーシングの全断面積に対
し、各吸音筒の占有面積の割合が多く、例えば円筒状吸
音筒の場合には、流体の通過可能な面積（オープンエリ
ア）がケーシング内の全断面積の約半分程度となってい
た。このため、流体に対する抵抗が大きくなり、圧力損
失が大きいという問題点があった。Further, in each of the conventional noise reduction devices, since a plurality of sound absorbing cylinders are closely arranged close to each other, each of the sound absorbing cylinders has a different cross-sectional area with respect to the entire sectional area of the casing in which the plurality of sound absorbing cylinders are arranged. The ratio of the area occupied by the cylinder is large. For example, in the case of a cylindrical sound absorbing cylinder, the area through which fluid can pass (open area) is about half of the total cross-sectional area in the casing. For this reason, there has been a problem that the resistance to the fluid is increased and the pressure loss is large.
【００１１】本発明はこれらの点に鑑みてなされたもの
であり、前述した従来のものにおける問題点を克服し、
良好な消音性能が得られ、しかも、軽量かつ流体に対す
る抵抗の小さい消音装置を提供することを目的とする。[0011] The present invention has been made in view of these points, and overcomes the above-described problems in the conventional art.
It is an object of the present invention to provide a noise reduction device that can obtain good noise reduction performance, is lightweight, and has low resistance to a fluid.
【００１２】[0012]
【課題を解決するための手段】前述した目的を達成する
ため請求項１に記載の本発明の消音装置は、間隙をもっ
て配設されそれぞれ四角筒状に形成された外筒および内
筒間の前記間隙内に吸音材を充填してなる複数個の吸音
筒をケーシング内に整列配置した消音装置において、前
記各吸音筒の外筒と内筒に多数の透孔を形成し、複数個
の前記吸音筒を前記ケーシング内に千鳥配置し、前記吸
音筒の外筒の外側における流体通過部の断面形状を前記
吸音筒の内筒の内側における流体通過部の断面形状とほ
ぼ等しくしたことを特徴としている。According to a first aspect of the present invention, there is provided a muffler according to the first aspect of the present invention, in which a silencer is provided between an outer cylinder and an inner cylinder which are provided with a gap and are each formed in a square cylindrical shape. In a silencer in which a plurality of sound absorbing cylinders each having a gap filled with a sound absorbing material are arranged in a casing, a large number of through holes are formed in an outer cylinder and an inner cylinder of each of the sound absorbing cylinders, and a plurality of the sound absorbing cylinders are formed. The cylinders are staggered in the casing and the suction
The cross-sectional shape of the fluid passage portion outside the outer cylinder of the sound cylinder is described above.
The cross-sectional shape of the fluid passage inside the inner cylinder of the
It is characterized by being substantially equal .
【００１３】また、請求項２に記載の本発明の消音装置
は、請求項１において、複数個の前記吸音筒の少なくと
も一部を矩形筒状に形成したことを特徴としている。[0013] Further, in the sound muffler of the present invention described in claim 2, in claim 1, at least a part of the plurality of sound absorbing cylinders is formed in a rectangular cylindrical shape.
【００１４】[0014]
【作用】請求項１に記載の本発明の消音装置によれば、
複数個の四角形状に形成された吸音筒を簡単に千鳥配置
させることができるとともに、消音性能を代えることな
く前記吸音筒の使用数を減少させることができるので、
消音装置の重量を低減させ、かつ、流体の通過可能な面
積を増加させることができる。According to the muffler of the present invention described in claim 1,
Since a plurality of square-shaped sound absorbing cylinders can be easily arranged in a staggered manner, and the number of the sound absorbing cylinders used can be reduced without changing the sound absorbing performance,
The weight of the silencer can be reduced, and the area through which fluid can pass can be increased.
【００１５】請求項２に示すように、複数個の四角形状
に形成された吸音筒の少なくとも一部を長辺と短辺とを
有する矩形筒状とすると、前述した請求項１に記載の作
用の他に、長辺および短辺の寸法にそれぞれ対応する特
定周波数の音波を特に大きく消音させることができ、特
定周波数のレベルが突出している音波をその音波の周波
数全体にわたり均一化させることができる。According to a second aspect of the present invention, at least a part of the plurality of rectangular sound absorbing cylinders is a rectangular cylinder having a long side and a short side. Besides, sound waves of a specific frequency corresponding to the dimensions of the long side and the short side can be particularly largely silenced, and a sound wave having a protruding level of the specific frequency can be made uniform over the entire frequency of the sound wave. .
【００１６】[0016]
【実施例】以下、本発明を図面に示す実施例について説
明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.
【００１７】まず、本発明に係る消音装置に用いる吸音
筒の一実施例について図１から図３について説明する。First, an embodiment of a sound absorbing cylinder used in a sound deadening device according to the present invention will be described with reference to FIGS.
【００１８】図１から図３は本発明に係る消音装置に適
用する吸音筒の一実施例を示すものであり、図１は吸音
筒の要部を示す一部切断側面図、図２は図１のＡ−Ａ断
面図、図３は口金の他の実施例を示す口金近傍の断面図
である。FIGS. 1 to 3 show an embodiment of a sound absorbing cylinder applied to the sound deadening device according to the present invention. FIG. 1 is a partially cutaway side view showing a main part of the sound absorbing cylinder, and FIG. 1 is a cross-sectional view taken along line AA, and FIG. 3 is a cross-sectional view near the base showing another embodiment of the base.
【００１９】図１および図２に示すように、後述する本
実施例の消音装置１に用いる吸音筒２は、多数の小径の
透孔３，３…がそのほぼ全域にわたって密に設けられた
所望の長さの四角筒状の角形外筒４内に、同様に多数の
小径の透孔５，５…がそのほぼ全域にわたって密に設け
られた四角筒状の角形内筒６を、適宜な間隙を以て配置
し、この間隙内に適宜な吸音材７を充填するとともに、
角形外筒４の各端部と角形内筒６の各端部とをそれぞれ
内側への音波の受入を良好ならしめるような適宜な口金
８，８により連結させることにより、略中空矩形筒状
（長方形）に形成されている。また、角形外筒４の長辺
をなす壁部４ａと短辺をなす壁部４ｂとは、それぞれ所
望角度の傾斜壁９を以て連結されている。この傾斜壁９
は、各吸音筒２を積み重ねる際に安全性を得るためのも
のである。As shown in FIGS. 1 and 2, a sound-absorbing cylinder 2 used in a silencer 1 according to the present embodiment described later has a desired number of small-diameter through-holes 3, 3. Are similarly provided in a rectangular outer cylinder 4 having a length of 2 mm, and a plurality of small-diameter through holes 5 are provided densely over substantially the entire area thereof. And a suitable sound absorbing material 7 is filled in the gap.
By connecting the respective ends of the rectangular outer cylinder 4 and the respective ends of the rectangular inner cylinder 6 with appropriate ferrules 8 and 8, which can properly receive the sound waves inside, a substantially hollow rectangular tube ( (Rectangular). Further, the wall 4a forming the long side and the wall 4b forming the short side of the rectangular outer cylinder 4 are connected by inclined walls 9 having desired angles. This inclined wall 9
Is for obtaining safety when stacking the sound absorbing cylinders 2.
【００２０】前記角形外筒４および角形内筒４の素材と
しては、軽量でしかも耐食性に優れたアルミニウム合金
が好ましいが、これに限定されるものではない。また、
透孔３，５の形成については、例えばパンチングボード
と称せられる多孔板により形成してもよい。The material of the rectangular outer cylinder 4 and the rectangular inner cylinder 4 is preferably an aluminum alloy which is lightweight and has excellent corrosion resistance, but is not limited thereto. Also,
The holes 3 and 5 may be formed by a perforated plate called a punching board, for example.
【００２１】前記吸音材７としては、グラスウール、ロ
ックウール等の吸音特性を有する公知の素材であれば、
種々のものを選択することができる。The sound absorbing material 7 may be any known material having sound absorbing properties, such as glass wool and rock wool.
Various things can be selected.
【００２２】前記口金は８の形状は、図３に示すよう
に、軸方向に頂点を有する断面山形の形状の口金８ａと
してもよく、特に、図１の形状に限定されるものではな
い。As shown in FIG. 3, the shape of the base 8 may be a base 8a having a mountain-shaped cross section having an apex in the axial direction, and is not particularly limited to the shape shown in FIG.
【００２３】つぎに、本発明に係る消音装置の一実施例
を説明する。Next, an embodiment of the muffler according to the present invention will be described.
【００２４】図４は本発明に係る消音装置を換気ダクト
に適用した一実施例を示す模式図である。FIG. 4 is a schematic view showing an embodiment in which the silencer according to the present invention is applied to a ventilation duct.
【００２５】図４に示すように、本実施例の消音装置１
は、ケーシングをなす縦断面四角筒状の所望の換気ダク
ト１０内に、複数個の前記吸音筒２，２，…を、各角形
外筒４に形成された傾斜壁９を相互に対向させ、間隔を
もって配置されている隣位の２個の吸音筒２，２の相互
に対向する各上端部の傾斜壁９，９上に他の吸音筒２の
下端部の２個の傾斜壁９，９を着座させるようにして複
数の吸音筒２を千鳥配置させて集合体として構成されて
いる。このように構成することにより、前記吸音筒２の
角形外筒４の外側における流体通過部の断面形状を前記
吸音筒２の角形内筒６の内側における流体通過部の断面
形状とほぼ等しくすることができる。 As shown in FIG. 4, the muffler 1 of the present embodiment
, A plurality of the sound-absorbing cylinders 2, 2,... With the inclined walls 9 formed on the respective rectangular outer cylinders 4 facing each other in a desired ventilation duct 10 having a quadrangular cylindrical section forming a casing, The two inclined walls 9, 9 at the lower end of the other sound absorbing cylinder 2 are placed on the inclined walls 9, 9 at the upper end of the two adjacent sound absorbing cylinders 2, 2 arranged at intervals. And a plurality of sound absorbing cylinders 2 are arranged in a staggered manner so as to be seated. With such a configuration, the sound absorbing cylinder 2
The cross-sectional shape of the fluid passage portion on the outside of the rectangular
Cross section of fluid passage portion inside rectangular inner cylinder 6 of sound absorbing cylinder 2
It can be almost equal to the shape.
【００２６】なお、本実施例においては、吸音筒２の角
形外筒４に形成した傾斜壁９を相互に対向させたが、図
５に示すように、前記傾斜壁９の代わりに四角形状の段
状凹部１１を４隅に形成した角形外筒４ａを用いた吸音
筒２ａとし、この段状凹部１１を相互に対向させ、間隔
をもって配置されている隣位の２個の吸音筒２，２の相
互に対向する各上端部の段状凹部１１，１１に他の吸音
筒２ａの下端部の２個の段状凹部１１，１１を嵌合させ
るようにして複数の吸音筒２ａを換気ダクト１０内に千
鳥配置させた消音装置１ａとしてもよい。さらには、前
記角形外筒４に傾斜壁９または段状凹部１１を設けず
に、図示しない適宜な千鳥配置用支持部材を介在させた
構成としてもよく、特に、図２または図５の形状に限定
されるものではない。In this embodiment, the inclined walls 9 formed on the rectangular outer cylinder 4 of the sound absorbing cylinder 2 are opposed to each other. However, as shown in FIG. The stepped recess 11 is a sound absorbing cylinder 2a using a square outer cylinder 4a formed at four corners, and the stepped recesses 11 are opposed to each other, and two adjacent sound absorbing cylinders 2, 2 arranged at intervals. The plurality of sound absorbing cylinders 2a are connected to the ventilation duct 10 by fitting the two stepped recesses 11 at the lower end of the other sound absorbing cylinder 2a into the stepped concaves 11 at the upper end facing each other. The silencer 1a may be staggered inside. Further, the rectangular outer cylinder 4 may not be provided with the inclined wall 9 or the stepped concave portion 11 and may be provided with a suitable staggered support member (not shown) interposed therebetween. It is not limited.
【００２７】また、換気ダクト１０の内面の前記吸音筒
２，２，…が配置されない部分に、図４および図５に破
線にて示すように、適宜な透孔を有する吸音パネル１０
ａを貼着したり、換気ダクト１０の全内面に、図示しな
い適宜な吸音パネルを貼着し、その吸音パネル内に前記
吸音筒２，２，…を千鳥配置させることにより、吸音効
果をさらに向上することができる。Also, a sound-absorbing panel 10 having an appropriate through-hole at the inner surface of the ventilation duct 10 where the sound-absorbing cylinders 2, 2,... Are not disposed as shown by broken lines in FIGS.
a, or a suitable sound absorbing panel (not shown) is stuck to the entire inner surface of the ventilation duct 10, and the sound absorbing cylinders 2, 2,... are staggered in the sound absorbing panel to further enhance the sound absorbing effect. Can be improved.
【００２８】また、前記消音装置１の千鳥配置させた各
角形吸音筒２を、リベット、バンド等の図示しない適宜
な固定部材または溶接等により相互に固定してもよい。The staggered rectangular sound absorbing cylinders 2 of the silencer 1 may be fixed to each other by a suitable fixing member (not shown) such as a rivet or a band or welding.
【００２９】つぎに、前述した構成からなる本実施例の
作用を図５から図１０について説明する。Next, the operation of this embodiment having the above-described configuration will be described with reference to FIGS.
【００３０】前述したように、本実施例の消音装置１
は、吸音筒２の角形外筒４に傾斜壁９または段状凹部１
１が形成されているので、この傾斜壁９または段状凹部
１１を相互に接合あるいは係合させることにより、複数
個の吸音筒２を簡単、かつ、確実に千鳥配置させること
ができる。As described above, the silencing device 1 of the present embodiment
Is provided on the rectangular outer cylinder 4 of the sound absorbing cylinder 2 with the inclined wall 9 or the stepped recess 1.
The plurality of sound absorbing cylinders 2 can be simply and reliably staggered by joining or engaging the inclined walls 9 or the stepped concave portions 11 with each other since the inclined walls 9 are formed.
【００３１】そして、消音装置１の吸音筒２の軸心部お
よび外周部を通過する流体の音波は、吸音筒２の角形外
筒４に形成された多数の透孔３，３，…ならびに角形内
筒６に形成された多数の透孔５，５，…から吸音筒２の
間隙内に流入し、吸音筒２の間隙内に充填された吸音材
７により吸収される。The sound waves of the fluid passing through the axial center portion and the outer peripheral portion of the sound absorbing cylinder 2 of the noise reduction device 1 are transmitted through a large number of through holes 3, 3,. .. Flows into the gap between the sound absorbing cylinders 2 through a number of through holes 5, 5,... Formed in the inner cylinder 6, and is absorbed by the sound absorbing material 7 filled in the gap between the sound absorbing cylinders 2.
【００３２】また、複数個の吸音筒２を千鳥配置してい
るので、例えば１辺１０ｍの正方形断面の換気ダクト１
０内に配置する吸音筒２の使用数を、従来５０個程度必
要であったものを２５個程度に半減させることができ、
消音装置１の軽量化を確実に図ることができる。そし
て、吸音筒２の使用数の削減は、流体の通過可能な面積
（オープンエリア）を確実に増加させることができる。Further, since the plurality of sound absorbing cylinders 2 are arranged in a staggered manner, for example, the ventilation duct 1 having a square section of 10 m on each side.
The number of used sound absorbing cylinders 2 arranged in 0 can be reduced by half from about 50 conventionally required to about 25,
Lightening of the silencer 1 can be reliably achieved. The reduction in the number of used sound absorbing cylinders 2 can reliably increase the area (open area) through which fluid can pass.
【００３３】また、吸音筒２は少なくとも長辺と短辺と
を有する略中空矩形筒状とされているので、吸音筒２の
長辺と短辺との比を適宜に変化（例えば１．５：１〜
５．０：１）させることにより、消音すべき音波のピー
ク周波数に対応させることができる。すなわち、消音す
べき音波の周波数特性が、特定の周波数に高いピークを
有する場合に、吸音筒２の長辺と短辺の長さ寸法をピー
ク周波数に対応するように設定することにより、そのピ
ークを特に大きく減衰させ、音波の全周波数にわたり均
一な音圧とする消音特性を得ることができる。Further, since the sound absorbing tube 2 is formed in a substantially hollow rectangular tube shape having at least a long side and a short side, the ratio between the long side and the short side of the sound absorbing tube 2 is appropriately changed (for example, 1.5. : 1
5.0: 1), it is possible to correspond to the peak frequency of the sound wave to be silenced. That is, when the frequency characteristic of the sound wave to be silenced has a high peak at a specific frequency, the length dimension of the long side and the short side of the sound absorbing cylinder 2 is set so as to correspond to the peak frequency. Can be greatly attenuated to obtain a noise-canceling characteristic of providing a uniform sound pressure over the entire frequency of the sound wave.
【００３４】なお、前記吸音筒２を中空四角形形状（正
方形）とし、特定のピーク周波数を効率よく消音させる
こともできる。The sound absorbing cylinder 2 may be formed in a hollow rectangular shape (square) so that a specific peak frequency can be efficiently silenced.
【００３５】つぎに、本実施例の消音装置と従来の消音
装置との消音性能の比較実験例を例示する。Next, an example of a comparison experiment of the noise reduction performance of the noise reduction device of the present embodiment and the conventional noise reduction device will be described.
【００３６】本比較実験は、風量：１００００ｍ3 ／ｍ
ｉｎ、風圧：１０００ｍｍＡｑ、回転数：１０００ｒｐ
ｍ、発生騒音：１１５ｄｂ（Ａ）、基本周波数：１３３
Ｈｚの送風機の吸込口に接続する縦４５００ｍｍ×横４
０５０ｍｍのダクト１０ｂ内に、消音装置を配置すると
ともに、消音装置の流体吸い込み面の正面１ｍ手前に騒
音計の測定子を配置して騒音レベルを測定した。In this comparative experiment, the air volume was 10,000 m 3 / m
in, wind pressure: 1000 mmAq, rotation speed: 1000 rpm
m, generated noise: 115 db (A), fundamental frequency: 133
4500mm × 4 width connected to the suction port of the blower
In the duct 050 mm of the 050 mm, the silencer was arranged, and the measuring element of the sound level meter was arranged 1 m in front of the fluid suction surface of the silencer to measure the noise level.
【００３７】そして、本比較実験に用いた本発明の消音
装置１ａとしては、図６に詳示する角形吸音筒２ａを２
３個用い、ダクト１０ｂ内に図５に示すように千鳥配置
させたものを使用し、比較のための従来の消音装置１２
としては、図７に示す円筒吸音筒１３を５６個用いて前
記ダクト内に図８に示す碁盤の目状に積み重ね配置させ
たものを使用した。As the noise reduction device 1a of the present invention used in this comparative experiment, a rectangular sound absorbing cylinder 2a shown in detail in FIG.
The conventional silencer 12 for comparison uses three pieces, which are staggered in the duct 10b as shown in FIG.
As shown in FIG. 7, 56 cylindrical sound absorbing cylinders 13 shown in FIG. 7 were used and the ducts were stacked and arranged in a grid pattern shown in FIG. 8 in the duct.
【００３８】また、パラメータとして消音装置の段数
（第１段目、第２段目、第３段目）を用いた。The number of stages of the muffler (first stage, second stage, third stage) was used as a parameter.
【００３９】図９および図１０に前記比較実験結果を示
す。FIGS. 9 and 10 show the results of the comparative experiment.
【００４０】図９に示す比較実験結果からも明らかなよ
うに、本比較実験に用いた本発明の消音装置１ａは、吸
音筒２ａの各段における使用数が従来の消音装置１２の
円筒吸音筒１３の使用数より格段に少ないにもかかわら
ず、従来の消音装置１２と同等の消音特性を有する。そ
して、本発明の消音装置１ａは、騒音の周波数が６３〜
２５０Ｈｚの範囲においては、従来の消音装置１２より
騒音の消音特性が向上していることが判明した。As is clear from the results of the comparative experiment shown in FIG. 9, the silencer 1a of the present invention used in the comparative experiment has the same structure as that of the conventional silencer 12 except that the number of stages used in the sound absorbing cylinder 2a is smaller. Although the number is smaller than that of the conventional muffler 13, the muffler 12 has the same silencing characteristics as the conventional silencer 12. And the noise reduction device 1a of the present invention has a noise frequency of 63 to
In the range of 250 Hz, it was found that the noise reduction characteristics of the conventional noise reduction device 12 were improved.
【００４１】また、図１０に示す比較実験結果からも明
らかなように、消音装置を多段として用いた場合には、
本比較実験に用いた本発明の消音装置１ａの騒音レベル
Ａ特性（人の可聴周波数）の消音量は、段数が多くなる
ほど従来の消音装置１２より優れていることが判明し
た。As is clear from the results of the comparative experiment shown in FIG. 10, when the muffler is used in multiple stages,
It was found that the noise reduction volume of the noise level A characteristic (human audible frequency) of the noise reduction device 1a of the present invention used in this comparative experiment was superior to the conventional noise reduction device 12 as the number of stages increased.
【００４２】したがって、本発明の消音装置１ａは、従
来の消音装置１２と同等あるいはそれ以上の消音性能を
有するとともに、確実に軽量化を図ることができ、経済
的負担を低減させることができる。Therefore, the silencer 1a of the present invention has a silencing performance equal to or higher than that of the conventional silencer 12, can be surely reduced in weight, and the economical burden can be reduced.
【００４３】また、前述した実施例の消音装置１，１ａ
を、流体の流れ方向に２段、３段と連接して多段とする
場合に、各段の吸音筒２，２ａを、流体の流れ方向にお
いて向きを縦横にすると消音効果を向上させることがで
きる。そして、消音装置１，１ａの各段をオフセットさ
せて配置させてもよい。さらに、千鳥配置させた吸音筒
２，２ａの内部の流体の流路、相互に対向する吸音筒
２，２ａの外側の流体の流路に、必要に応じて図示しな
い適宜なバッフルを設けてもよい。Further, the muffler 1, 1a of the above-described embodiment is used.
Is connected to two or three stages in the fluid flow direction to form a multistage, and the sound absorbing cylinders 2 and 2a in each stage are oriented vertically and horizontally in the fluid flow direction to improve the noise reduction effect. . And each stage of the silencers 1 and 1a may be offset and arranged. Further, a suitable baffle (not shown) may be provided in the fluid flow path inside the staggered sound absorbing cylinders 2 and 2a and the fluid flow path outside the mutually opposite sound absorbing cylinders 2 and 2a as necessary. Good.
【００４４】また、図１１に示すように、吸音筒２の角
形内筒６の長辺の中央部に適宜な係合凹部１４を設け、
この係合凹部１４に対応させた係合凸部１５を有する図
において破線にて示す適宜な吸音パネル１６または図示
しない適宜なバッフル等を着脱自在とすることにより、
吸音筒２の内側の流路を１つの断面矩形の流路と、２つ
の断面正方形の流路とに使い分けることもできる。そし
て、特定の周波数の音波を消音させる場合には、前記２
つの断面正方形の流路を有する吸音筒２とすると効果的
である。また、前記吸音パネル１６は、適宜な吸音材７
を充填した所望の透孔を有する筺体を用いてもよい。As shown in FIG. 11, a suitable engaging recess 14 is provided at the center of the long side of the rectangular inner cylinder 6 of the sound absorbing cylinder 2.
By making an appropriate sound absorbing panel 16 shown by a broken line or an appropriate baffle (not shown) detachable in a drawing having an engaging convex portion 15 corresponding to the engaging concave portion 14,
The flow path inside the sound absorbing cylinder 2 can be selectively used as a flow path having one rectangular cross section and a flow path having two square cross sections. When the sound wave of a specific frequency is to be silenced,
It is effective to use a sound absorbing cylinder 2 having two square cross sections. The sound absorbing panel 16 is provided with a suitable sound absorbing material 7.
A housing having a desired through hole filled with may be used.
【００４５】なお、本発明は、前記実施例に限定される
ものではなく、必要に応じて変更することができる。It should be noted that the present invention is not limited to the above-described embodiment, and can be modified as needed.
【００４６】[0046]
【発明の効果】以上説明したように本発明の消音装置に
よれば、従来の消音性能を保持した状態で、軽量かつ流
体に対する抵抗の小さい消音装置を得ることができる
し、また、吸音筒の外筒の外側における流体通過部の断
面形状を吸音筒の内筒の内側における流体通過部の断面
形状とほぼ等しくしたので、どの流体通過部を通過した
音波も等しい消音量をもって消音されることになり、効
果的な消音を行うことができるという極めて優れた効果
を奏する。As described above, according to the silencer of the present invention, a lightweight silencer having low resistance to fluid can be obtained while maintaining the conventional silencer performance.
In addition, disconnection of the fluid passage outside the outer cylinder of the sound absorbing cylinder
The cross section of the fluid passage inside the inner cylinder of the sound absorbing cylinder
Since it was almost equal to the shape, it passed through any fluid passage
Sound waves are also silenced with equal silencing volume,
An extremely excellent effect is achieved in that sound can be effectively silenced .
【図１】本発明に係る消音装置に適用する吸音筒の一実
施例の要部を示す一部切断側面図FIG. 1 is a partially cut-away side view showing a main part of an embodiment of a sound absorbing cylinder applied to a sound deadening device according to the present invention.
【図２】図１のＩ−Ｉ断面図FIG. 2 is a sectional view taken along line II of FIG. 1;
【図３】口金の他の実施例を示す口金近傍の断面図FIG. 3 is a cross-sectional view of the vicinity of the base showing another embodiment of the base.
【図４】本発明に係る消音装置を換気ダクトに適用した
一実施例を示す模式図FIG. 4 is a schematic view showing one embodiment in which the silencer according to the present invention is applied to a ventilation duct.
【図５】本発明に係る消音装置の他の実施例を示す模式
図FIG. 5 is a schematic view showing another embodiment of the muffler according to the present invention.
【図６】比較実験に用いた本発明の消音装置の吸音筒を
示す縦断面図および正面図FIG. 6 is a longitudinal sectional view and a front view showing a sound absorbing cylinder of the silencer of the present invention used in a comparative experiment.
【図７】比較実験に用いた従来の消音装置の円筒吸音筒
を示す詳細図FIG. 7 is a detailed view showing a cylindrical sound absorbing cylinder of the conventional silencer used in the comparative experiment.
【図８】比較実験に用いた従来の消音装置の配列状態を
説明する図FIG. 8 is a diagram illustrating an arrangement state of a conventional silencer used in a comparative experiment.
【図９】本発明の消音装置と従来の消音装置との消音特
性の比較実験結果を示す図FIG. 9 is a diagram showing a comparison experiment result of noise reduction characteristics of the noise reduction device of the present invention and a conventional noise reduction device.
【図１０】本発明の消音装置と従来の消音装置との段数
による消音特性の比較実験結果を示す図FIG. 10 is a diagram showing a comparison experiment result of noise reduction characteristics according to the number of stages of the noise reduction device of the present invention and a conventional noise reduction device.
【図１１】本発明に係る消音装置に適用する吸音筒の他
の実施例を示す模式図FIG. 11 is a schematic view showing another embodiment of the sound absorbing cylinder applied to the sound deadening device according to the present invention.
１，１ａ 消音装置 ２，２ａ 吸音筒 ３ 透孔 ４，４ｃ 角形外筒 ４ａ 長辺をなす壁部 ４ｂ 短辺をなす壁部 ５ 透孔 ６ 角形内筒 ７ 吸音材 ８，８ａ 口金 ９ 傾斜壁 １０，１０ｂ ダクト １１ 段状凹部 DESCRIPTION OF SYMBOLS 1, 1a Silencer 2, 2a Sound absorption cylinder 3 Through hole 4, 4c Square outer cylinder 4a Wall forming long side 4b Wall forming short side 5 Through hole 6 Square inner cylinder 7 Sound absorbing material 8, 8a Cap 9 Slant wall 10, 10b duct 11 stepped recess
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭57−169889（ＪＰ，Ｕ) 実開 平１−105715（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F01N 1/24 F01N 1/04 G10K 11/16 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho-57-169889 (JP, U) Japanese Utility Model Utility Model Hei 1-105715 (JP, U) (58) Fields surveyed (Int. Cl. 7 , DB name) F01N 1/24 F01N 1/04 G10K 11/16
Claims (2)
に形成された外筒および内筒間の前記間隙内に吸音材を
充填してなる複数個の吸音筒をケーシング内に整列配置
した消音装置において、前記各吸音筒の外筒と内筒に多
数の透孔を形成し、複数個の前記吸音筒を前記ケーシン
グ内に千鳥配置し、前記吸音筒の外筒の外側における流
体通過部の断面形状を前記吸音筒の内筒の内側における
流体通過部の断面形状とほぼ等しくしたことを特徴とす
る消音装置。1. A silencer in which a plurality of sound absorbing cylinders arranged with a gap and filled with a sound absorbing material in the gap between an outer cylinder and an inner cylinder each formed in the shape of a square cylinder are arranged in a casing. In the above, a large number of through holes are formed in an outer cylinder and an inner cylinder of each of the sound absorbing cylinders, a plurality of the sound absorbing cylinders are staggered in the casing, and a flow outside the outer cylinder of the sound absorbing cylinder is formed.
The cross-sectional shape of the body passage portion inside the inner cylinder of the sound absorbing cylinder
A silencer characterized in that the cross-sectional shape of the fluid passage portion is substantially equal .
矩形筒状に形成したことを特徴とする請求項１に記載の
消音装置。2. The muffler according to claim 1, wherein at least a part of the plurality of sound absorbing tubes is formed in a rectangular tube shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30257092A JP3318368B2 (en) | 1992-11-12 | 1992-11-12 | Silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30257092A JP3318368B2 (en) | 1992-11-12 | 1992-11-12 | Silencer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06146845A JPH06146845A (en) | 1994-05-27 |
| JP3318368B2 true JP3318368B2 (en) | 2002-08-26 |
Family
ID=17910573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30257092A Expired - Lifetime JP3318368B2 (en) | 1992-11-12 | 1992-11-12 | Silencer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3318368B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3411911B2 (en) | 2001-03-29 | 2003-06-03 | 三菱重工業株式会社 | Square pipe, basket and spent fuel container for spent fuel storage |
| JP6506935B2 (en) * | 2014-09-30 | 2019-04-24 | 三菱日立パワーシステムズ株式会社 | Silencer comprising silencer and gas turbine comprising the same |
| US9771865B2 (en) * | 2014-10-28 | 2017-09-26 | General Electric Company | Inlet bleed heat manifold including acoustically treated feed pipe |
-
1992
- 1992-11-12 JP JP30257092A patent/JP3318368B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06146845A (en) | 1994-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4287962A (en) | Packless silencer | |
| US5783782A (en) | Multi-chamber muffler with selective sound absorbent material placement | |
| US5365025A (en) | Low backpressure straight-through reactive and dissipative muffler | |
| US7350620B2 (en) | Compact silencer | |
| JPH0271300A (en) | Sound absorbing body and sound absorbing duct using this body | |
| JP2603131B2 (en) | Silencer | |
| US3515242A (en) | Exhaust silencer for internal combustion engines | |
| JP3318368B2 (en) | Silencer | |
| JP3449460B2 (en) | Vehicle muffler | |
| CA1137877A (en) | Packless silencer | |
| JPH0681627A (en) | Exhaust muffler for engine | |
| JP3446790B2 (en) | Shell for silencer | |
| JPH01139952A (en) | Muffler for air conditioner | |
| JP3540443B2 (en) | Silencer in combustion equipment | |
| JPH10110611A (en) | Silencer | |
| JP4296107B2 (en) | Silencer | |
| CN209944712U (en) | Noise elimination piece, silencer and ventilation system | |
| CN218818866U (en) | Silencer for large-scale passage and subway air duct | |
| JPH04371792A (en) | Resonance type muffler for multi-tube type heat exchanger | |
| JPS5931989Y2 (en) | Sound absorbing silencer | |
| KR100482517B1 (en) | Structure of muffler for decreasing noise of automobile | |
| JPH03286947A (en) | Duct type silensor | |
| JPS58119913A (en) | Muffler body in muffler for fan | |
| JPH01296040A (en) | Noise damping device using resonance for air supply duct | |
| JP2646720B2 (en) | Silencer for turbo chiller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080614 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090614 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100614 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110614 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120614 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130614 Year of fee payment: 11 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130614 Year of fee payment: 11 |