JPH0475368B2 - - Google Patents
Info
- Publication number
- JPH0475368B2 JPH0475368B2 JP59069766A JP6976684A JPH0475368B2 JP H0475368 B2 JPH0475368 B2 JP H0475368B2 JP 59069766 A JP59069766 A JP 59069766A JP 6976684 A JP6976684 A JP 6976684A JP H0475368 B2 JPH0475368 B2 JP H0475368B2
- Authority
- JP
- Japan
- Prior art keywords
- absorbing material
- sound
- sound absorbing
- inner tube
- braided
- 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
- 239000011358 absorbing material Substances 0.000 claims description 44
- 239000011490 mineral wool Substances 0.000 claims description 4
- 239000011491 glass wool Substances 0.000 claims description 3
- 230000003584 silencer Effects 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 230000030279 gene silencing Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/003—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages
- F01N1/006—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages comprising at least one perforated tube extending from inlet to outlet of the silencer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
- F01N1/023—Helmholtz resonators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2310/00—Selection of sound absorbing or insulating material
- F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos or the like
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は内燃機関の消音器に使用している吸音
材の保持構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a structure for holding a sound absorbing material used in a muffler for an internal combustion engine.
吸音材を用いた消音器は、いろいろな消音素子
の中でも最も効果的な素子の一つとして広く利用
されている。上記吸音材使用消音器は、多孔パン
チング管などの通気性のある管に、その周りに空
洞を形成するように該通気性管よりも大い外管を
かぶせ、その内外の管の間にグラスウールやロツ
クウールなどの吸音材を充填したものである。そ
の吸音材は、一定厚さのマツト状に形成したもの
を通気性管の外周面に巻付ける、あるいはバイン
ダを加えて焼付け成形したものを内外の管の間に
挿入固定している。
Silencers using sound-absorbing materials are widely used as one of the most effective of various sound-absorbing elements. The above-mentioned sound absorbing material muffler covers a permeable pipe such as a perforated pipe with an outer pipe larger than the permeable pipe so as to form a cavity around the permeable pipe, and glass wool is placed between the inner and outer pipes. It is filled with sound-absorbing materials such as rock wool and rock wool. The sound absorbing material is formed into a mat shape of a certain thickness and wrapped around the outer circumferential surface of the breathable tube, or is baked and molded with a binder and inserted and fixed between the inner and outer tubes.
上記の構成の吸音材充填形消音器は、吸音材が
器外に飛散して消音機能を低下し耐久性に問題が
ある。その原因としては、内外管の加工誤差等に
より吸音材の充填が十分且つ均一に行われ難い。
したがつて吸音材の充填密度にバラツキがあり、
振動等でガタを生じて吸音材に隙間ができ、排気
の気流に巻き込まれる。高速の排気流が作用する
等の諸々の点が相互に関連し合つて消音機能の低
下を早めるものである。
The sound absorbing material-filled muffler having the above-mentioned structure has a problem in durability because the sound absorbing material scatters outside the muffler, reducing the muffling function. The reason for this is that it is difficult to fill the sound absorbing material sufficiently and uniformly due to machining errors in the inner and outer tubes.
Therefore, there are variations in the packing density of the sound absorbing material,
Vibration causes rattling, creating gaps in the sound-absorbing material, which get caught up in the exhaust airflow. Various factors such as the effect of high-speed exhaust flow work together to accelerate the deterioration of the silencing function.
本発明は、通気性のある内管に巻付け固定する
吸音材の保持構造を改善して上記の問題点を解決
しようとするものである。 The present invention aims to solve the above-mentioned problems by improving the structure for holding a sound absorbing material that is wound and fixed around a breathable inner tube.
本発明は、通気性を有する内管と、その内管に
巻付けたマツト状または内管を含む形状に焼付成
形したグラスウールあるいはロツクウール製吸音
材と、その吸音材の上にかぶせた耐熱線材で編ん
だ綴じ目の無い編組筒体とによつて構成し、その
編組筒体の軸方向への引つ張りによる編組筒体の
縮径によつて吸音材を内管に押圧保持させたこと
を特徴とする。
The present invention consists of a breathable inner tube, a glass wool or rock wool sound absorbing material wrapped around the inner tube in a mat shape or a shape including the inner tube by baking, and a heat-resistant wire material placed over the sound absorbing material. The sound-absorbing material is compressed and held against the inner tube by reducing the diameter of the braided tube by pulling the braided tube in the axial direction. Features.
編組筒体が持つている軸方向および円周方向の
たわみ性によつて吸音性が通気性内管に押圧保持
され、各部均一な密度の吸音材層が形成される。
Due to the axial and circumferential flexibility of the braided cylinder, the sound absorbing properties are pressed against the breathable inner tube, and a sound absorbing material layer having a uniform density is formed in each part.
吸音材の飛散がなくて消音機能を低下する原因
が除かれ、消音器の耐久性を増大する。 Since there is no scattering of the sound absorbing material, the cause of deterioration of the sound damping function is eliminated, and the durability of the sound muffler is increased.
〔実施例〕
図に示す実施例について説明すると、１はパン
チング管、すなわち管の周面について内外に通気
性を有する管、２は通気性管の外周面に巻付けた
吸音材、３はその吸音材２を外側から内管１に対
し押圧的に保持する編組筒体である。[Example] To explain the example shown in the figure, 1 is a punched tube, that is, a tube that has air permeability inside and out on the circumferential surface of the tube, 2 is a sound absorbing material wrapped around the outer circumferential surface of the breathable tube, and 3 is a permeable tube. It is a braided cylindrical body that presses and holds the sound absorbing material 2 against the inner tube 1 from the outside.
組立て順序としては、前記のようにマツト状の
吸音材２を通気性内管１に所要の厚さになるよう
に巻付け、また所要の厚さ形状に焼付け成形した
吸音材２で通気性内管１を包み、スチールワイヤ
ー・耐熱性糸・グラスフアイバー長繊維等の線材
を用いて例えば網代編みした編組筒体３を上記吸
音材２にかぶせる。 As for the assembly order, as described above, the pine-shaped sound absorbing material 2 is wrapped around the breathable inner tube 1 to the required thickness, and the sound absorbing material 2 is baked and molded to the desired thickness to form the breathable inner tube 1. The sound-absorbing material 2 is covered with a braided cylinder 3 which is wrapped around the tube 1 and is made of wire such as steel wire, heat-resistant yarn, glass fiber long fibers, etc., for example, by wickerwork.
次いで編組筒体を軸方向に引つ張つて編組筒体
３の筒径を縮めることによつて吸音材２を通気性
内管１に十分に押圧する。その吸音材２を押圧し
た状態で編組筒体３の両端部３ａを絞つて内管１
に溶接・接着等の固着手段で固定する。 Next, the sound absorbing material 2 is sufficiently pressed against the breathable inner tube 1 by pulling the braided tube in the axial direction to reduce the diameter of the braided tube 3. With the sound absorbing material 2 pressed, both ends 3a of the braided cylinder body 3 are squeezed, and the inner tube 1 is
Fix it by welding, gluing, or other fixing means.
あるいは第３図のように、編組筒体３を吸音材
２の周面に締付け力を調整しながら編み上げるこ
ともできる。また第４図１のように編組線ａの素
線ｂの数を増減し、あるいは同図２のように編み
目ｃの大小で編組筒体３の通気性を調整すること
ができる。 Alternatively, as shown in FIG. 3, the braided cylinder 3 can be knitted around the circumferential surface of the sound absorbing material 2 while adjusting the tightening force. Furthermore, the air permeability of the braided cylinder 3 can be adjusted by increasing or decreasing the number of strands b of the braided wire a, as shown in FIG. 4, or by changing the size of the stitches c, as shown in FIG. 2.
通気性内管１に吸音材２を巻付けるのに本発明
の吸音材保持構造を実施すると従来の外管が要ら
ない。したがつて、第２図の共鳴室４に挿入した
排気導入管５に本発明の吸音材保持構造によつて
吸音材を取付けると、共鳴形の消音機能と吸音形
の消音機能を併有させることができる。 When the sound absorbing material holding structure of the present invention is implemented to wrap the sound absorbing material 2 around the breathable inner tube 1, the conventional outer tube is not required. Therefore, when a sound absorbing material is attached to the exhaust gas introduction pipe 5 inserted into the resonance chamber 4 shown in FIG. 2 using the sound absorbing material holding structure of the present invention, it has both a resonance type sound silencing function and a sound absorption type silencing function. be able to.
第１図・第２図に示す排気排出管６のように、
編組筒体３で押圧固定した吸音材２の周りに適当
な空隙８を置いて外管７をかぶせることも可能で
ある。この場合の外管７は、従来の吸音形消音器
の吸音材を保持する目的のものではなく、吸音材
の通過した音を反射させて、その反射効果を消音
に利用するためのものである。 Like the exhaust discharge pipe 6 shown in Figs. 1 and 2,
It is also possible to place an appropriate gap 8 around the sound absorbing material 2 pressed and fixed by the braided cylinder 3 and cover the outer tube 7. The outer tube 7 in this case is not intended to hold the sound-absorbing material of a conventional sound-absorbing muffler, but to reflect the sound that has passed through the sound-absorbing material and utilize the reflection effect for sound deadening. .
本発明の吸音材保持構造によると、吸音材２は
その外面にかぶせた編組筒体３の軸方向への引つ
張りによる該筒体３の径の縮小によつて押圧保持
される。その編組筒体３は耐熱線材で編んだ綴じ
目の無い筒状のものであり、従来の円弧面形状が
決まつた金属板製の外管と異なり軸方向にも円周
方向にもたわみ性を持つているから、吸音材２の
密度、巻層間の間隙、通気性内管１との間隙など
に不均一があれば、その間隙等を押しつぶすよう
に吸音材２を押圧して保持する。したがつて上記
の関隙等がなくなつて各部均一な密度の吸音材層
が形成されるとともに、吸音材が飛散して消音機
能を低下する原因が除かれて消音器の耐久性を増
大する効果がある。
According to the sound-absorbing material holding structure of the present invention, the sound-absorbing material 2 is held under pressure by reducing the diameter of the braided cylindrical body 3 placed over its outer surface by pulling it in the axial direction. The braided cylinder 3 is a seamless cylinder made of heat-resistant wire, and unlike the conventional outer tube made of a metal plate with a fixed circular arc shape, it has flexibility in both the axial and circumferential directions. Therefore, if there is any unevenness in the density of the sound absorbing material 2, the gap between the winding layers, the gap with the breathable inner tube 1, etc., the sound absorbing material 2 is pressed and held so as to crush the gap. Therefore, the above-mentioned gaps, etc. are eliminated, and a sound-absorbing material layer with uniform density is formed in each part, and the cause of the sound-absorbing material being scattered and reducing the sound-damping function is eliminated, increasing the durability of the silencer. effective.
第１図は本発明の吸音材保持構造を実施した吸
音形消音器の縦断側面図、第２図は本発明の吸音
材保持構造を実施した消音器の他の実施例の縦断
側面図、第３図は吸音材に対する編組筒体の編み
上げ要領を示す側面図、第４図は編組筒体の粗密
を示す筒体面の一部の正面図。
１は通気性を有する内管、２は吸音材、３は編
組筒体。
FIG. 1 is a longitudinal sectional side view of a sound-absorbing silencer implementing the sound-absorbing material holding structure of the present invention, and FIG. FIG. 3 is a side view showing how to knit the braided cylinder to the sound-absorbing material, and FIG. 4 is a front view of a part of the cylinder surface showing the density of the braided cylinder. 1 is a breathable inner tube, 2 is a sound absorbing material, and 3 is a braided cylinder.
Claims (1)
マツト状または内管を包む形状に焼付成形したグ
ラスウールあるいはロツクウール製吸音材と、そ
の吸音材の上にかぶせた耐熱線材で編んだ綴じ目
の無い編組筒体から成り、吸音材は、編組筒体の
軸方向への引つ張りによる編組筒体の縮径によつ
て内管に押圧保持されていることを特徴とする消
音器の吸音材保持構造。1 A breathable inner tube, a glass wool or rock wool sound absorbing material wrapped around the inner tube in a pine-like shape or baked into a shape that wraps around the inner tube, and a binding made of heat-resistant wire covered over the sound absorbing material. A silencer comprising a meshless braided cylindrical body, wherein the sound absorbing material is held under pressure against an inner tube by the diameter reduction of the braided cylindrical body by pulling the braided cylindrical body in the axial direction. Sound absorbing material retention structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6976684A JPS60212607A (en) | 1984-04-06 | 1984-04-06 | Sound absorbing material holding construction for muffler |
| US06/667,720 US4580656A (en) | 1984-04-06 | 1984-11-02 | Absorbent retainer for absorbent type muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6976684A JPS60212607A (en) | 1984-04-06 | 1984-04-06 | Sound absorbing material holding construction for muffler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60212607A JPS60212607A (en) | 1985-10-24 |
| JPH0475368B2 true JPH0475368B2 (en) | 1992-11-30 |
Family
ID=13412244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6976684A Granted JPS60212607A (en) | 1984-04-06 | 1984-04-06 | Sound absorbing material holding construction for muffler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60212607A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0645615Y2 (en) * | 1988-01-27 | 1994-11-24 | 三恵技研工業株式会社 | Silencer |
| AUPO247496A0 (en) | 1996-09-23 | 1996-10-17 | Resmed Limited | Assisted ventilation to match patient respiratory need |
| WO2012132047A1 (en) * | 2011-03-28 | 2012-10-04 | 株式会社コガネイ | Ejector |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428952A (en) * | 1977-08-09 | 1979-03-03 | Toyota Motor Corp | Silencer for internal combustion engine |
-
1984
- 1984-04-06 JP JP6976684A patent/JPS60212607A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428952A (en) * | 1977-08-09 | 1979-03-03 | Toyota Motor Corp | Silencer for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60212607A (en) | 1985-10-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |