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JP3547171B2 - Inner cylinder and silencer - Google Patents
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JP3547171B2 - Inner cylinder and silencer - Google Patents

Inner cylinder and silencer Download PDF

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Publication number
JP3547171B2
JP3547171B2 JP15785794A JP15785794A JP3547171B2 JP 3547171 B2 JP3547171 B2 JP 3547171B2 JP 15785794 A JP15785794 A JP 15785794A JP 15785794 A JP15785794 A JP 15785794A JP 3547171 B2 JP3547171 B2 JP 3547171B2
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JP
Japan
Prior art keywords
inner cylinder
silencer
support
vane
outer diameter
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 - Fee Related
Application number
JP15785794A
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Japanese (ja)
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JPH084697A (en
Inventor
元 三関
吉親 山田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Muki Co Ltd
Original Assignee
Nippon Muki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Muki Co Ltd filed Critical Nippon Muki Co Ltd
Priority to JP15785794A priority Critical patent/JP3547171B2/en
Publication of JPH084697A publication Critical patent/JPH084697A/en
Application granted granted Critical
Publication of JP3547171B2 publication Critical patent/JP3547171B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【0001】
【産業上の利用分野】
本発明は工場、ビル、倉庫等で産業用や空調用に用いられる各種送風機等に使用されるサイレンサに関するものである。
【0002】
【従来の技術】
従来、この種のサイレンサとしては、ケーシング本体の空気吸込口側に支持具を介して中心部に内筒と該内筒の外周に複数個のベーンを該ケーシング本体の軸方向に配設した斜流ファン等の軸流方式のサイレンサが提案されている。この軸流方式のサイレンサは、空気抵抗を少なくし、しかも整流作用を付与するため、前記内筒は砲弾形、前記ベーンは翼形に形成されている。また、ケーシング本体内に封入されるグラスウール等の吸音材と共に送風機の騒音と風切り音を吸収する吸音作用を付与するため、内筒とベーンは共にグラスウール成形体で構成されている。
【0003】
【発明が解決しようとする課題】
サイレンサは内筒とベーンを一体成形体とすることが困難なため、それぞれ別々に製作したものを支持具に固定することが必要である。この固定の際、内筒は空気抵抗を少なくするために内筒本体の筒部の外径を一定にしていることから、筒部を支持具の所定位置に位置決めすることが難しく、また、最初所定位置に位置決めしたものの風圧により内筒が支持具からずれてしまいサイレンサとしての役目を十分に発揮できない問題がある。しかも最悪の結果として、内筒が支持具より外れて送風機へ巻き込まれる危険性がある。
本発明は、前記従来の問題点を解消し、内筒の位置決めが容易で、しかも内筒が使用中に位置ずれを起こさないサイレンサを提供することを目的とする。
【0004】
【課題を解決するための手段】
本発明の内筒は、ファンのサイレンサに用いる砲弾形内筒であって、内筒本体の筒部の外径よりも先端部の外径を大径としたことを特徴とする。
また、本発明のサイレンサはケーシング本体の空気吸込口側に支持具を介して中心部に砲弾形内筒と該内筒の外周に複数個の翼形ベーンを該ケーシング本体の軸方向に配設したサイレンサであって、前記砲弾形内筒を内筒本体の筒部の外径よりも先端部の外径を大径とし、該先端部と該筒部の境界部において該支持具で支持するようにしたことを特徴とする。
尚、前記筒部の外半径Rと前記先端部の外半径Rの差は2〜10mmであることが好ましい。これは2mm未満であると所定位置への位置決め、或いは風圧による位置ずれ防止に効果がなく、また、10mmを越えると空気抵抗が大となり整流効果が低下するからである。
【0005】
空気抵抗を少なくする観点から内筒は砲弾形、ベーンは翼形に形成されている。また、内筒とベーンは送風機の騒音と風切り音を吸収する吸音作用を付与するため、ガラス繊維、ロックウール等の無機質繊維成形体で構成し、成形体の表面には繊維飛散防止のため表皮材として、無機質繊維、合成繊維等の不織布を設けている。
【0006】
前記成形体の代表的製法は、各成形体を半割状態にしておいて組込時に合わせて使うようにするため、上半分、下半分を別々に成形する。この場合、所望形状の下型に未硬化の無機質繊維ウェブと不織布を型になじませて置き、上型で挟み、加熱加圧成形してバインダーを硬化させて製造する。尚、上半分、下半分を別々に成形しなくても一体成形してもよい。
【0007】
支持具は内筒を固定する内筒取付部とベーンを固定するベーン取付部とで構成される。
【0008】
【作用】
内筒は空気抵抗を少なくする観点から砲弾形としているが、内筒本体の先端部の外径を筒部の外径よりも大径とすることにより、支持具に対して内筒本体の先端部と筒部の境界において位置決めし易く、しかも使用時に風圧によりずれることを防止できる。
【0009】
【実施例】
以下、本発明の実施例を図面に基づき説明する。
本実施例では、本発明サイレンサの斜流送風機用消音ボックスへの取付けを例にして説明する。
図1aは消音ボックス付き斜流送風機の断面図、図1bは図1aのI−I線断面図である。
消音ボックス付斜流送風機1は、ファン部1aとサイレンサ部1bから成り、ファン部1aに送風機2が設けられ、サイレンサ部1bの吸込口1c側にサイレンサ3が設けられている。サイレンサ3は、砲弾形の内筒4とその外周に配設された翼形のベーン5から構成されている。尚、送風機2とサイレンサ3はグラスウール吸音材6を介してケーシング7内に固設されている。尚、図中8は支持具、9はボルトを示す。
【0010】
図2は砲弾形の内筒4を半割にした成形体の側面図である。
この内筒4の半割成形体は、平均繊維径8μmで未硬化のバインダーを含むガラス短繊維ウェブとポリエステル長繊維製不織布を内筒4の半割形状に合わせた下金型に載置し、上金型にて挟み、加熱温度200℃、加熱時間95秒、加圧17kg/cmで加熱加圧成形して得たものである。
本実施例では、内筒4の内筒本体4aの先端部4bの外半径Rを52mm、筒部4cの外半径Rを50mmとすることにより外半径Rと外半径Rの差が2mmとなるようにして段差部4dを設けるようにした。
【0011】
図3は翼形のベーン5を半割にした成形体の側面図である。
ベーン5の半割成形体は、上記の内筒4と同じ製法で得たものである。
尚、ベーン5の半割成形体の合わせ面5aには支持具8への固定用溝5bが設けてある。図中5cは取付穴を示す。
【0012】
支持具8はリング状の補強部8aの外周にケーシング取付部8b,8bを2本対向配置させ、このケーシング取付部8b,8bを介してケーシング7へ取付け自在としてある。また、補強部8aと同心円状に小リング状の内筒取付部8cを配置し、この内筒取付部8cと前記補強部8aとの連結部をベーン取付部8dとし、本実施例では、内筒取付部8cの外周に7本配置するようにした。尚、図中8eは取付穴を示す。
【0013】
次に、支持具8への内筒4とベーン5の取付け方法について図5により説明する。
まず、図2に示した内筒4の半割成形体同士をホットメルト等の接着剤により接着固定し、内筒取付部8cへ挿通し、内筒本体4aの先端部4bと筒部4cの境界の段差部4eが内筒取付部8cでしっかり止まるようにする。尚、この時、吸音性能向上のため無機質繊維成形体を内筒本体4a内に充填することもできる。
次に、ベーン5の半割成形体同士をベーン取付部8dを挟むようにしてホットメルト等の接着剤で接着固定すると共に、ベーン取付部8dに設けられた取付穴8eとベーン5に設けられた取付穴5cへボルト9を通し締付固定する。
このようにして内筒4とベーン5の支持具8への取付を終える。
【0014】
【発明の効果】
以上説明した通り、本発明によれば、内筒を支持具の内筒取付部に挿入するだけで簡単に所定位置に位置決めでき、しかも、使用時の風圧による位置ずれがない。また、使用中に支持具の内筒取付部から内筒が外れる危険性を回避できフェイルセーフとなる。
【図面の簡単な説明】
【図1】図1aは消音ボックス付き斜流送風機の断面図、図1bは図1aのI−I線断面図
【図2】内筒を半割にした成形体の側面図
【図3】ベーンを半割にした成形体の側面図
【図4】図4aは支持具の正面図、図4bは図4aのII−II線断面図
【図5】支持具への内筒とベーンの取付方法を示す図
【符号の説明】
1 消音ボックス付斜流送風機
1a ファン部
1b サイレンサ部
1c 吸込口
2 送風機
3 サイレンサ
4 内筒
4a 内筒本体
4b 先端部
4c 筒部
4d 段差部
5 ベーン
5a 合わせ面
5b 固定用溝
5c 取付穴
6 グラスウール吸音材
7 ケーシング
8 支持具
8a 補強部
8b ケーシング取付部
8c 内筒取付部
8d ベーン取付部
8e 取付穴
9 ボルト
筒部の外半径
先端部の外半径
[0001]
[Industrial applications]
The present invention relates to a silencer used for various blowers and the like used for industrial or air conditioning in factories, buildings, warehouses, and the like.
[0002]
[Prior art]
Conventionally, as a silencer of this type, an oblique cylinder having an inner cylinder at the center and a plurality of vanes disposed on the outer periphery of the inner cylinder in the axial direction of the casing via a support on the air suction port side of the casing main body. An axial flow type silencer such as a flow fan has been proposed. In this axial flow type silencer, the inner cylinder is formed in a shell shape and the vane is formed in an airfoil shape in order to reduce air resistance and to provide a rectifying action. The inner cylinder and the vane are both formed of a glass wool molded body in order to provide a sound absorbing effect of absorbing a blower noise and wind noise together with a sound absorbing material such as glass wool enclosed in the casing body.
[0003]
[Problems to be solved by the invention]
Since it is difficult for the silencer to integrally form the inner cylinder and the vane, it is necessary to fix separately manufactured products to the support. At the time of this fixing, since the outer diameter of the inner cylinder body is made constant in order to reduce air resistance, it is difficult to position the cylinder at a predetermined position of the support, and Although positioned at a predetermined position, there is a problem in that the inner cylinder is displaced from the support by the wind pressure, and the role as a silencer cannot be sufficiently exhibited. Moreover, as a worst result, there is a risk that the inner cylinder may come off the support and be caught in the blower.
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and to provide a silencer in which the positioning of the inner cylinder is easy and the inner cylinder does not shift during use.
[0004]
[Means for Solving the Problems]
The inner cylinder of the present invention is a shell-shaped inner cylinder used for a silencer of a fan, wherein an outer diameter of a tip portion is larger than an outer diameter of a cylindrical portion of the inner cylinder body.
Further, the silencer of the present invention has a shell-shaped inner cylinder at the center and a plurality of airfoil vanes on the outer periphery of the inner cylinder in the axial direction of the casing body via a support on the air suction port side of the casing body. A silencer, wherein the shell-shaped inner cylinder has an outer diameter at a tip portion larger than an outer diameter of a cylinder portion of an inner cylinder body, and is supported by the support at a boundary portion between the tip portion and the cylinder portion. It is characterized by doing so.
Incidentally, the difference between the outer radius R 2 of the outer radius R 1 and said distal end portion of the cylindrical portion is preferably 2 to 10 mm. This is because if it is less than 2 mm, there is no effect on positioning to a predetermined position or prevention of displacement due to wind pressure, and if it exceeds 10 mm, the air resistance increases and the rectification effect decreases.
[0005]
From the viewpoint of reducing air resistance, the inner cylinder is formed in a shell shape, and the vane is formed in a wing shape. In addition, the inner cylinder and the vane are made of an inorganic fiber molded body such as glass fiber or rock wool to give a sound absorbing effect of absorbing the noise and wind noise of the blower, and the surface of the molded body is covered with a skin to prevent fiber scattering. As the material, a nonwoven fabric such as an inorganic fiber and a synthetic fiber is provided.
[0006]
In a typical manufacturing method of the molded body, the upper half and the lower half are separately molded so that each molded body is put into a half-split state and used at the time of assembling. In this case, the uncured inorganic fiber web and the nonwoven fabric are placed in a lower mold of a desired shape, placed in a mold, sandwiched by an upper mold, and heated and pressed to cure the binder. Note that the upper half and the lower half may be integrally formed instead of being separately formed.
[0007]
The support includes an inner cylinder mounting portion for fixing the inner cylinder and a vane mounting portion for fixing the vane.
[0008]
[Action]
The inner cylinder is shell-shaped from the viewpoint of reducing air resistance, but by making the outer diameter of the tip of the inner cylinder body larger than the outer diameter of the cylinder, the tip of the inner cylinder body with respect to the support It is easy to position at the boundary between the part and the cylindrical part, and it can be prevented from being shifted by wind pressure during use.
[0009]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present embodiment, an example will be described in which the silencer of the present invention is attached to a sound deadening box for a mixed flow blower.
1A is a cross-sectional view of the mixed flow blower with a sound deadening box, and FIG. 1B is a cross-sectional view taken along line II of FIG. 1A.
The mixed flow blower 1 with a sound deadening box includes a fan unit 1a and a silencer unit 1b. The fan unit 1a is provided with a blower 2, and the silencer 3 is provided on the suction port 1c side of the silencer unit 1b. The silencer 3 includes a shell-shaped inner cylinder 4 and a vane-shaped vane 5 disposed on the outer periphery thereof. Note that the blower 2 and the silencer 3 are fixed in a casing 7 via a glass wool sound absorbing material 6. In the drawing, reference numeral 8 denotes a support, and 9 denotes a bolt.
[0010]
FIG. 2 is a side view of a molded body obtained by halving the shell-shaped inner cylinder 4.
The half-molded product of the inner cylinder 4 is placed on a lower mold in which a short glass fiber web having an average fiber diameter of 8 μm and containing an uncured binder and a nonwoven fabric of polyester long fiber are adjusted to the half shape of the inner cylinder 4. It is obtained by pressing and molding at a heating temperature of 200 ° C., a heating time of 95 seconds, and a pressure of 17 kg / cm 2 .
In this embodiment, the difference between the outer radius R 2 and the outer radius R 1 of the outer radius R 2 52 mm, an outer radius R 1 of the cylindrical portion 4c by the 50mm of the distal end portion 4b of the inner cylinder main body 4a of the inner cylinder 4 Is set to 2 mm and the step portion 4d is provided.
[0011]
FIG. 3 is a side view of a formed body obtained by dividing the airfoil vane 5 in half.
The half molded body of the vane 5 is obtained by the same manufacturing method as that of the inner cylinder 4 described above.
A groove 5b for fixing to the support 8 is provided on the mating surface 5a of the half molded body of the vane 5. In the drawing, 5c indicates a mounting hole.
[0012]
The support 8 has two casing mounting portions 8b, 8b opposed to each other on the outer periphery of the ring-shaped reinforcing portion 8a, and can be attached to the casing 7 via the casing mounting portions 8b, 8b. In addition, a small ring-shaped inner cylinder mounting portion 8c is arranged concentrically with the reinforcing portion 8a, and a connecting portion between the inner cylinder mounting portion 8c and the reinforcing portion 8a is a vane mounting portion 8d. Seven tubes are arranged on the outer periphery of the tube mounting portion 8c. In the drawing, 8e indicates a mounting hole.
[0013]
Next, a method of attaching the inner cylinder 4 and the vane 5 to the support 8 will be described with reference to FIG.
First, the half-molded bodies of the inner cylinder 4 shown in FIG. 2 are bonded and fixed to each other with an adhesive such as hot melt and inserted into the inner cylinder mounting portion 8c, and the distal end portion 4b of the inner cylinder main body 4a and the cylindrical portion 4c are joined together. The step portion 4e at the boundary is securely stopped at the inner cylinder mounting portion 8c. At this time, an inorganic fiber molded body may be filled in the inner cylinder main body 4a in order to improve the sound absorbing performance.
Next, the molded halves of the vane 5 are adhesively fixed to each other with an adhesive such as hot melt so as to sandwich the vane attachment portion 8d. Pass the bolt 9 through the hole 5c and tighten it.
Thus, the attachment of the inner cylinder 4 and the vane 5 to the support 8 is completed.
[0014]
【The invention's effect】
As described above, according to the present invention, it is possible to easily position the inner cylinder at a predetermined position simply by inserting the inner cylinder into the inner cylinder mounting portion of the support tool, and there is no displacement due to wind pressure during use. Further, the risk of the inner cylinder being detached from the inner cylinder mounting portion of the support during use can be avoided, and fail-safe operation can be achieved.
[Brief description of the drawings]
1A is a cross-sectional view of a mixed flow blower with a sound deadening box, and FIG. 1B is a cross-sectional view taken along a line II of FIG. 1A. FIG. 2 is a side view of a formed body in which an inner cylinder is divided in half. FIG. 4A is a front view of a support, FIG. 4B is a cross-sectional view taken along the line II-II of FIG. 4A, and FIG. 5A is a method of attaching an inner cylinder and a vane to the support. [Explanation of symbols]
REFERENCE SIGNS LIST 1 mixed flow blower with silencing box 1a fan 1b silencer 1c suction port 2 blower 3 silencer 4 inner cylinder 4a inner cylinder body 4b tip 4c cylinder 4d step 5 vane 5a mating surface 5b fixing groove 5c mounting hole 6 glass wool Sound absorbing material 7 Casing 8 Support 8a Reinforcing part 8b Casing mounting part 8c Inner cylinder mounting part 8d Vane mounting part 8e Mounting hole 9 Bolt R 1 Outer radius R of cylinder part 2 Outer radius of tip part

Claims (4)

ファンのサイレンサに用いる砲弾形内筒であって、内筒本体の筒部の外径よりも先端部の外径を大径としたことを特徴とする内筒。An inner cylinder used for a silencer of a fan, wherein an outer diameter of a tip portion is larger than an outer diameter of a cylindrical portion of the inner cylinder body. 前記筒部の外半径Rと前記先端部の外半径Rの差が2〜10mmであることを特徴とする請求項1記載の内筒。The inner cylinder according to claim 1 , wherein a difference between an outer radius R1 of the cylindrical portion and an outer radius R2 of the tip portion is 2 to 10 mm. ケーシング本体の空気吸込口側に支持具を介して中心部に砲弾形内筒と該内筒の外周に複数個の翼形ベーンを該ケーシング本体の軸方向に配設したサイレンサであって、前記砲弾形内筒を内筒本体の筒部の外径よりも先端部の外径を大径とし、該先端部と該筒部の境界部において該支持具で支持するようにしたことを特徴とするサイレンサ。A silencer in which a shell-shaped inner cylinder and a plurality of airfoil vanes are arranged on an outer periphery of the inner cylinder in a central portion of the casing main body via a support on an air suction port side of the casing main body in an axial direction of the casing main body, The shell-shaped inner cylinder has a larger outer diameter at the tip than the outer diameter of the cylinder of the inner cylinder main body, and is supported by the support at the boundary between the tip and the cylinder. Silencer to do. 前記筒部の外半径Rと前記先端部の外半径Rの差が2〜10mmであることを特徴とする請求項3記載のサイレンサ。Silencer according to claim 3, wherein the difference between the outer radius R 2 of the outer radius R 1 and said distal end of said tubular portion is characterized in that it is a 2 to 10 mm.
JP15785794A 1994-06-16 1994-06-16 Inner cylinder and silencer Expired - Fee Related JP3547171B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15785794A JP3547171B2 (en) 1994-06-16 1994-06-16 Inner cylinder and silencer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15785794A JP3547171B2 (en) 1994-06-16 1994-06-16 Inner cylinder and silencer

Publications (2)

Publication Number Publication Date
JPH084697A JPH084697A (en) 1996-01-09
JP3547171B2 true JP3547171B2 (en) 2004-07-28

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2492515A3 (en) * 2011-02-28 2018-05-23 Soler & Palau Research, S.L. Helico centrifugal fan

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2492515A3 (en) * 2011-02-28 2018-05-23 Soler & Palau Research, S.L. Helico centrifugal fan

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Publication number Publication date
JPH084697A (en) 1996-01-09

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