JPH07158596A - Axial blower - Google Patents
Axial blowerInfo
- Publication number
- JPH07158596A JPH07158596A JP30317693A JP30317693A JPH07158596A JP H07158596 A JPH07158596 A JP H07158596A JP 30317693 A JP30317693 A JP 30317693A JP 30317693 A JP30317693 A JP 30317693A JP H07158596 A JPH07158596 A JP H07158596A
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- peripheral portion
- casing
- outer peripheral
- noise
- 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
- 230000002093 peripheral effect Effects 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
(57)【要約】
【目的】 比較的安価で、また、在来品への応用は新し
く隙間調整物を追加するだけで容易に出来る高効率、低
騒音の軸流送風機を実現する。
【構成】 円筒状ケーシング（１）内に駆動機（２）で
駆動される羽根車（４）を有する軸流送風機において、
羽根車外周部に対向するケーシングの内周部に羽根車
（４）と接触しても機能を損わない弾力性に富んだ例え
ばフェルトのような部材からなる隙間調整物（７）を設
ける。
(57) [Summary] [Purpose] To realize an axial blower with high efficiency and low noise, which is relatively inexpensive and can be easily applied to conventional products simply by adding a new clearance adjuster. An axial flow fan having an impeller (4) driven by a drive (2) in a cylindrical casing (1),
On the inner peripheral portion of the casing facing the outer peripheral portion of the impeller, a gap adjuster (7) made of a member such as felt, which is highly elastic and does not impair its function even if it comes into contact with the impeller (4), is provided.
Description
【０００１】[0001]
【産業上の利用分野】本発明は効率を向上し軸動力を下
げると共に、騒音を低減する軸流送風機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axial blower which improves efficiency, lowers shaft power, and reduces noise.
【０００２】[0002]
【従来の技術】従来の軸流送風機は一般に図３に示すよ
うに、円筒状のケーシング（１）の内部に電動機を駆動
機（２）として取付脚（３）にて取付け、羽根車（４）
を駆動機（２）の回転軸（５）に取付け、図中矢印のよ
うに通風運転する。ケーシング内周部と羽根車外周部の
間は一定の隙間（６）を保って羽根車が回転する。しか
しながら省エネルギー、環境改善の面から、効率の向
上、及び騒音の低減を要望されるようになった。2. Description of the Related Art Generally, as shown in FIG. 3, a conventional axial-flow blower has a cylindrical casing (1) in which an electric motor is mounted as a driving unit (2) by a mounting leg (3), and an impeller (4) is installed. )
Is attached to the rotary shaft (5) of the drive machine (2), and a ventilation operation is performed as indicated by an arrow in the figure. The impeller rotates while maintaining a constant gap (6) between the inner peripheral portion of the casing and the outer peripheral portion of the impeller. However, from the viewpoint of energy saving and environmental improvement, there has been a demand for higher efficiency and lower noise.
【０００３】そこで、特開平３−２０６３９８号公報に
示される発明が提案されているが、これは羽根車外周部
分に対向するケーシングの内壁部分に貫通穴を設け、そ
の貫通穴はケーシング外周部を通り送風機吸込側部分ま
で貫通させ、羽根車外周部で発生した乱流を逃がす工夫
をし、騒音低減を達成している。Therefore, the invention disclosed in Japanese Patent Laid-Open No. 3-206398 has been proposed, in which a through hole is provided in the inner wall portion of the casing facing the outer peripheral portion of the impeller, and the through hole is formed in the outer peripheral portion of the casing. By passing through to the suction side of the blower to eliminate the turbulent flow generated at the outer peripheral part of the impeller, noise is reduced.
【０００４】[0004]
【発明が解決しようとする課題】上記のような手段では
ケーシング製作工数および原価が大になり、構造も複雑
になっている。しかも、製作時から上記構造をケーシン
グ内に作り込んでおかなければならず、在来品の改造へ
の応用が難しいという問題がある。With the above means, the number of manufacturing steps of the casing and the cost are large, and the structure is complicated. In addition, the above structure must be built in the casing from the time of manufacture, and there is a problem that it is difficult to apply it to modification of a conventional product.
【０００５】本発明の目的は、比較的安価で、また、在
来品への応用は新しく隙間調整物を追加するだけで容易
に出来る高効率、低騒音の軸流送風機を提供することに
ある。An object of the present invention is to provide an axial blower which is relatively inexpensive and which can be easily applied to conventional products simply by adding a new clearance adjuster and which has low noise. .
【０００６】[0006]
【課題を解決するための手段】本発明は上記課題を解決
するために、羽根車外周部に対向するケーシングの内周
部に隙間調整物を設け、ケーシングと羽根車の隙間を少
なくする。隙間調整物には、羽根車と接触しても機能を
損わない弾力性に富んだ例えばフェルトのような部材を
用い、隙間を事実上ゼロに近い状態で運転出来る構造と
する。In order to solve the above problems, the present invention reduces the gap between the casing and the impeller by providing a gap adjuster on the inner peripheral portion of the casing facing the outer peripheral portion of the impeller. As the clearance adjuster, a member such as felt, which is highly elastic and does not impair its function even when it comes into contact with the impeller, is used, and the structure is such that the clearance can be operated practically close to zero.
【０００７】[0007]
【作用】ケーシング内周部と羽根車外周部の間の隙間が
あることによって、流れの状態によっては隙間の部分か
ら逆流が生じ、効率が低下すると共に流れの乱れによっ
て騒音が大きくなる。Since there is a gap between the inner peripheral portion of the casing and the outer peripheral portion of the impeller, a backflow is generated from the gap portion depending on the flow state, which reduces efficiency and increases noise due to turbulence of the flow.
【０００８】本発明によれば、ケーシング内周部と羽根
車外周部の間の隙間が事実上ゼロに近い状態で運転可能
となる為、逆流を防止出来、効率を向上することが出来
る。さらに羽根車外周部での流れが改善され、騒音を低
減することが可能となる。According to the present invention, since the operation can be performed with the gap between the inner peripheral portion of the casing and the outer peripheral portion of the impeller being substantially close to zero, backflow can be prevented and efficiency can be improved. Further, the flow in the outer peripheral portion of the impeller is improved, and noise can be reduced.
【０００９】[0009]
【実施例】以下、本発明の一実施例について図１及び図
２を参照して説明する。尚、図１において従来例の図３
と同一部分には同一符号を付して説明を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In addition, in FIG. 1, FIG.
The same parts as those in FIG.
【００１０】図１において図３と異なるところは、羽根
車（４）の外周部に対向するケーシング（１）の内周部
に羽根車外周部との隙間がゼロに近い状態になるよう
に、羽根車（４）と接触しても機能を損わない弾力性に
富んだ例えばフェルトのような部材から成る隙間調整物
（７）を取り付けることである。The difference between FIG. 1 and FIG. 3 is that the clearance between the inner peripheral portion of the casing (1) facing the outer peripheral portion of the impeller (4) and the outer peripheral portion of the impeller is close to zero. The gap adjuster (7) is made of a material such as felt, which is highly elastic and does not impair its function even if it comes into contact with the impeller (4).
【００１１】上記構成によれば、羽根車外周部に対向す
るケーシングの内周部に隙間調整物を取り付けるだけで
目的は達成出来、また、原価も安くできる。試験結果に
よる効率、騒音の比較を図２に示す。曲線ａが図３で表
した従来の効率曲線で、曲線ｂが隙間調整物（７）付き
の効率曲線である。また曲線ｃが従来の騒音特性曲線
で、曲線ｄが隙間調整物（７）付きの騒音特性曲線であ
る。図２を見ると明らかに本実施例の方が効率が上がっ
ており、騒音も低減している。従って図３に示した従来
例の軸流送風機の効率向上、低騒音対策として、隙間調
節物（７）を取付けると効果が大で安価に改造できる。According to the above construction, the object can be achieved and the cost can be reduced only by mounting the gap adjusting member on the inner peripheral portion of the casing facing the outer peripheral portion of the impeller. A comparison of efficiency and noise according to the test results is shown in FIG. The curve a is the conventional efficiency curve shown in FIG. 3, and the curve b is the efficiency curve with the clearance adjuster (7). Further, the curve c is a conventional noise characteristic curve, and the curve d is a noise characteristic curve with the gap adjuster (7). It is apparent from FIG. 2 that the efficiency is higher and the noise is reduced in the present embodiment. Therefore, as a measure for improving the efficiency and reducing noise of the conventional axial flow fan shown in FIG. 3, the gap adjuster (7) is very effective and can be modified at low cost.
【００１２】[0012]
【発明の効果】以上説明したように本発明によれば、構
造が簡単であり、従来のものを改造することも容易に出
来、安価な高効率でかつ騒音レベルの低い軸流送風機を
提供することが出来る。As described above, according to the present invention, there is provided an axial blower which has a simple structure, can be easily modified from a conventional one, is inexpensive, has high efficiency, and has a low noise level. You can
【図１】本発明の一実施例の軸流送風機を示す縦断面
図。FIG. 1 is a longitudinal sectional view showing an axial blower according to an embodiment of the present invention.
【図２】従来例と実施例の騒音と効率を示す曲線図。FIG. 2 is a curve diagram showing noise and efficiency of a conventional example and an example.
【図３】従来の軸流送風機を示す縦断面図。FIG. 3 is a vertical cross-sectional view showing a conventional axial blower.
１…ケーシング ２…駆動機 ３…取付脚 ４…羽根車 ５…回転軸 ７…隙間調整物 1 ... Casing 2 ... Driver 3 ... Mounting leg 4 ... Impeller 5 ... Rotating shaft 7 ... Gap adjuster
Claims (1)
る羽根車を有する軸流送風機において、羽根車外周部に
対向するケーシングの内周部に羽根車と接触しても機能
を損なわない弾力性に富んだ例えばフェルトのような部
材から成る隙間調整物を有することを特徴とする軸流送
風機1. An axial flow fan having an impeller driven by a drive unit in a cylindrical casing, the elasticity of which does not impair the function even when the inner peripheral portion of the casing facing the outer peripheral portion of the impeller comes into contact with the impeller. Axial blower characterized by having a clearance adjuster made of a material such as felt, which is rich in properties
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30317693A JPH07158596A (en) | 1993-12-03 | 1993-12-03 | Axial blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30317693A JPH07158596A (en) | 1993-12-03 | 1993-12-03 | Axial blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07158596A true JPH07158596A (en) | 1995-06-20 |
Family
ID=17917804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30317693A Pending JPH07158596A (en) | 1993-12-03 | 1993-12-03 | Axial blower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07158596A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704494A (en) * | 2022-04-27 | 2022-07-05 | 林胜利 | Cold air circulating type air blower |
-
1993
- 1993-12-03 JP JP30317693A patent/JPH07158596A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704494A (en) * | 2022-04-27 | 2022-07-05 | 林胜利 | Cold air circulating type air blower |
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