JPS63150499A - Axial flow fan - Google Patents
Axial flow fanInfo
- Publication number
- JPS63150499A JPS63150499A JP29954286A JP29954286A JPS63150499A JP S63150499 A JPS63150499 A JP S63150499A JP 29954286 A JP29954286 A JP 29954286A JP 29954286 A JP29954286 A JP 29954286A JP S63150499 A JPS63150499 A JP S63150499A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- noise
- peak
- generated
- kinds
- 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
- 238000010276 construction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は軸流送風機に関するものである。[Detailed description of the invention] Industrial applications The present invention relates to an axial blower.
従来の技術
従来、細流送風機は、一般に第４図および第６図に示す
ような構成であった。すなわち、円筒の形状をした風胴
１１の空気の流入側に断面が円弧状のベルマウス１２を
設け、前記風胴１１の内部に動力となる電動機１３を風
胴１１から連結した取付脚１４によって固定し、前記電
動機１３の動力を伝達する出力軸１６に羽根ボス１６を
装着している。羽根ポス１ｅには、複数枚の羽根１７を
固着し、これらの羽根１７の形状および取付角度はすべ
て同一に構成していた。BACKGROUND OF THE INVENTION Traditionally, trickle fans have generally been constructed as shown in FIGS. 4 and 6. That is, a bell mouth 12 having an arc-shaped cross section is provided on the air inflow side of the wind cylinder 11 having a cylindrical shape, and an electric motor 13 serving as a power source is provided inside the wind cylinder 11 by means of a mounting leg 14 connected to the wind cylinder 11. A blade boss 16 is attached to an output shaft 16 that is fixed and transmits the power of the electric motor 13. A plurality of blades 17 were fixed to the blade post 1e, and the shapes and mounting angles of these blades 17 were all configured to be the same.
発明が解決しようとする問題点
このような従来の構成では、羽根１７の形状および取付
角度がすべて同一であるので１羽根１７一枚ごとに送り
出される空気の性状も同じで、羽根１７の数である２（
ｎ＋１）に比例した周波数の騒音が発生する。この例で
は羽根１７の故は６であり回転数をＮ（ｒｐｍ） 、羽
根１７の定数をｋとすると、その騒音のピークは６ｋＮ
／５ｏ（Ｈｚ）の周波数となる。このピークの騒音を低
減することは、軸流送風機としての騒音低減となるが、
このピークの騒音を低減するには、従来では、回転数を
下げる以外にはできず性能を維持して低減することはで
きないという問題があった。Problems to be Solved by the Invention In such a conventional configuration, since the shape and mounting angle of the blades 17 are all the same, the properties of the air sent out from each blade 17 are also the same, and the number of blades 17 varies. There are 2 (
Noise with a frequency proportional to n+1) is generated. In this example, the force of the blade 17 is 6, the rotation speed is N (rpm), and the constant of the blade 17 is k, the peak of the noise is 6kN.
/5o (Hz) frequency. Reducing this peak noise will reduce noise as an axial blower, but
Conventionally, the only way to reduce this peak noise was to lower the rotational speed, and there was a problem in that it could not be reduced while maintaining performance.
本発明はこのような問題点を解決するもので、羽根の枚
数と回転数の積で決まるピークの騒音を低減することに
あり、ピークの騒音を２つに分割して軸流送風機として
の騒音を低減することを目的とするものである。The present invention solves these problems by reducing the peak noise determined by the product of the number of blades and the rotation speed, and by dividing the peak noise into two parts to reduce the noise as an axial blower. The purpose is to reduce the
問題点を解決するだめの手段
この問題点を解決するだめに本発明は、２（ｎ−）−１
）枚の羽根を羽根の形状と取付角度を２種類とし。Means for Solving the Problem In order to solve this problem, the present invention provides a solution of 2(n-)-1
) blades with two types of blade shapes and mounting angles.
その仕事量を等しくして交互に配置してなる軸流送風機
を構成したものである。This is an axial flow blower that is arranged alternately so that the amount of work is equalized.
作 用
この構成によシ、羽根の形状と取付角度が異なる２種類
の羽根を交互に配置しているので、羽根の定数が異なり
回転数との積で発生するピークの騒音は２つの周波数で
起こり、ピークの騒音の大きさは従来の１つのピークの
騒音に較べて低下することになる。したがって軸流送風
機としての騒音が低減することとなる。Function: With this configuration, two types of blades with different blade shapes and mounting angles are arranged alternately, so the constants of the blades are different, and the peak noise generated when multiplied by the rotation speed is generated at two frequencies. As a result, the magnitude of the peak noise is reduced compared to the conventional single peak noise. Therefore, noise as an axial blower is reduced.
実施例
以下本発明の一実施例を第１図〜第３図にもとづき説明
する。EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 3.
円筒の形状をした風胴１の空気の流入側に断面が円弧状
のベルマウス２を設け、前記風胴１の内部に動力となる
電動機３を風胴１から連結した取付脚４によって固定し
、前記電動機３の動力を伝達する出力軸６に羽根ボス６
を装着する。羽根ボス６に固着された羽根Ａ７の取付角
度はα１で。A bell mouth 2 having an arc-shaped cross section is provided on the air inflow side of a wind cylinder 1 having a cylindrical shape, and an electric motor 3 serving as a power source is fixed inside the wind cylinder 1 by a mounting leg 4 connected to the wind cylinder 1. , a vane boss 6 is provided on the output shaft 6 that transmits the power of the electric motor 3.
Attach. The mounting angle of the blade A7 fixed to the blade boss 6 is α1.
羽根Ｂ８の取付角度はα２でα１〈α２の関係であり、
また羽根Ａ７の面積は羽根Ｂ８の面積より大きく、羽根
Ａ７と羽根Ｂ８と仕事量が等しくなっており１羽根Ａ７
と羽根Ｂ８とは交互に固着されており、また羽根ボス６
は前記出力軸６に固定されて電動機３の出力を受ける。The mounting angle of the blade B8 is α2, and the relationship is α1<α2,
Also, the area of blade A7 is larger than the area of blade B8, and the amount of work done by blade A7 and blade B8 is equal, so one blade A7
and the blade B8 are fixed alternately, and the blade boss 6
is fixed to the output shaft 6 and receives the output of the electric motor 3.
羽根Ａ７と羽根Ｂ８との合計の羽根の枚数は２（ｎ−）
−１）（ｎは正の ゛整数）枚で、この実施例では６枚
となっている。The total number of blades of blade A7 and blade B8 is 2 (n-)
-1) (n is a positive integer), which is six in this embodiment.
上記構成において、羽根Ａ７において発生するピークの
騒音は３ ｋ １Ｎ／６０ （Ｈｚ ） （ｋｌは羽根
Ａ７の定数、Ｎは回転数とする）の周波数であり、羽根
Ｂ８のピークの騒音は３ ｋ ２ Ｎ／６０ （Ｈｚ
） （ｋ２は羽根Ｂ８の定数）の周波数である。羽根Ａ
７と羽根Ｂ８とのピークの騒音がそれぞれの羽根の形状
と取付角度で異なることにより違った周波数で発生する
ことになり、２つのピークの騒音が発生する。ピークの
騒音が２つに分割されるのでピークの騒音の大きさも低
下することになる。In the above configuration, the peak noise generated in the blade A7 has a frequency of 3 k 1N/60 (Hz) (kl is a constant of the blade A7, and N is the rotation speed), and the peak noise generated in the blade B8 is 3 k 2 N/60 (Hz
) (k2 is a constant of the blade B8). Feather A
The peak noises of the blades 7 and B8 are generated at different frequencies because the shapes and mounting angles of the blades are different, resulting in two peak noises. Since the peak noise is divided into two, the magnitude of the peak noise is also reduced.
以上のように本実施例によれば、２種ｍ←Ｍの羽根Ａ７
と羽根Ｂ８を交互に配置しているので。As described above, according to this embodiment, the blade A7 of type 2 m←M
and blade B8 are arranged alternately.
２種類のピークの騒音が発生することになり、騒音が分
散され軸流送風機として騒音低減できることとなる。Two types of peak noise will be generated, and the noise will be dispersed and the noise can be reduced as an axial flow blower.
発明の効果
以上の実施例の説明より明らかなように本発明によれば
、羽根の形状と取付角度の異なる２種類の羽根を交互に
配置しているので、羽根の枚数と回転数との積で決まる
ピークの騒音を２つに分割することにより、軸流送風機
として騒音低減ができるという効果が得られる。Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, two types of blades with different blade shapes and mounting angles are arranged alternately, so that the product of the number of blades and the rotation speed is By dividing the peak noise determined by , into two parts, it is possible to achieve the effect of reducing noise as an axial flow blower.
第１図は本発明の一実施例による軸流送風機を示す側断
面図、第２図は同軸流送風機の正面図、第３図は同軸流
送風機の羽根の取付状態を示す展開図、第４図は従来の
軸流送風機の正面図、第５図は同側面図である。FIG. 1 is a side cross-sectional view showing an axial blower according to an embodiment of the present invention, FIG. 2 is a front view of the coaxial blower, FIG. 3 is an exploded view showing how the blades of the coaxial blower are attached, and FIG. The figure is a front view of a conventional axial flow blower, and FIG. 5 is a side view of the same.
Claims (1)
類とし、その仕事量を等しくして交互に配置してなる軸
流送風機。An axial flow blower consisting of 2 (n+1) blades with two types of blade shapes and mounting angles, and arranged alternately to equalize the amount of work done.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29954286A JPS63150499A (en) | 1986-12-16 | 1986-12-16 | Axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29954286A JPS63150499A (en) | 1986-12-16 | 1986-12-16 | Axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63150499A true JPS63150499A (en) | 1988-06-23 |
Family
ID=17873960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29954286A Pending JPS63150499A (en) | 1986-12-16 | 1986-12-16 | Axial flow fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63150499A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0261399A (en) * | 1988-08-26 | 1990-03-01 | Calsonic Corp | Axial flow fan |
| JP2003042094A (en) * | 2001-07-27 | 2003-02-13 | Zexel Valeo Climate Control Corp | Axial flow fan |
| KR100487378B1 (en) * | 2002-12-10 | 2005-05-03 | 엘지전자 주식회사 | Spiral Fan Assembly |
| JP2011045354A (en) * | 2009-08-25 | 2011-03-10 | Tsugumitsu Matsui | Propeller fan for protected horticulture air conditioner |
-
1986
- 1986-12-16 JP JP29954286A patent/JPS63150499A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0261399A (en) * | 1988-08-26 | 1990-03-01 | Calsonic Corp | Axial flow fan |
| JP2003042094A (en) * | 2001-07-27 | 2003-02-13 | Zexel Valeo Climate Control Corp | Axial flow fan |
| KR100487378B1 (en) * | 2002-12-10 | 2005-05-03 | 엘지전자 주식회사 | Spiral Fan Assembly |
| JP2011045354A (en) * | 2009-08-25 | 2011-03-10 | Tsugumitsu Matsui | Propeller fan for protected horticulture air conditioner |
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