JPH0318698A - Centrifugal fan - Google Patents
Centrifugal fanInfo
- Publication number
- JPH0318698A JPH0318698A JP15384989A JP15384989A JPH0318698A JP H0318698 A JPH0318698 A JP H0318698A JP 15384989 A JP15384989 A JP 15384989A JP 15384989 A JP15384989 A JP 15384989A JP H0318698 A JPH0318698 A JP H0318698A
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- side end
- end portion
- suction side
- suction
- 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
- 210000001015 abdomen Anatomy 0.000 abstract 2
- 238000000926 separation method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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、断面が翼形状をした多数の羽根を有する遠心
ファンに関する．
（従来の技術）
従来から、羽根の断面形状が翼の断面形状とほぼ同一な
ものとされている各種のターボファン、翼形ファン、ラ
ジアルファン、多翼ファン等の遠心ファンが提供されて
いる．
それは、例えば特開昭５５−６６６９７号公報、実開昭
５７−１５７７８８号公報、実開昭６３−５４８９２号
公報のものである．第１の特開昭５５−６６６９７号公
報のものは、ブレードにおいての吸込開を内周から外周
に向かうにしたがって漸次肉厚に形戒したものであり、
第２の実開昭５７−１ ５７７８８号公報のものは，そ
の羽根が翼背面の曲率が翼腹面の曲率の方が小さく、弦
長方向について前後対称の上反りの三ケ月断面に形成さ
れたものであり、第３の実開昭６３−５４８９２号公報
のものは、その羽根において、内側端から外側端近傍に
かけて隣合う羽根との間に形成される流路断面の大きさ
が等しくなるよう徐々に肉厚にすると共に、外開端近傍
から外側端にかけて徐々に肉薄となるよう横成したもの
である．（発明が解決しようとする課！！）
ところが、叙上のような従来の第１、第２の断面形状の
ものは、単に翼断面形状としたもので、その吸込開、吐
出測での空気流に伴なう空気抵抗を考慮したものではな
い．また、第３のものは、流路断面においての吸込側と
吐出側とがほぼ一定になるようにしたものであるも、内
周測と外周劇とでの遠心作用に伴ない異なる流速を考慮
していない．
しかも、いずれのものも、吸込側、吐出測の端部は、空
気流との抵抗を減少させるために断面が次第に肉薄にな
る鋭端に形或されている．しかしながら、端部を鋭端に
形戒すると、かえって乱流が生じ易く、騒音が大きくな
り、また、空気特性も悪くなるものであった。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a centrifugal fan having a large number of blades each having a wing-shaped cross section. (Prior Art) Various centrifugal fans, such as turbo fans, airfoil fans, radial fans, and multi-blade fans, have been provided in which the cross-sectional shape of the blades is almost the same as the cross-sectional shape of the blades. ．． For example, those disclosed in Japanese Unexamined Patent Publication No. 55-66697, Japanese Utility Model Application No. 57-157788, and Japanese Utility Model Application No. 63-54892. In the first Japanese Patent Application Laid-Open No. 55-66697, the suction opening in the blade is gradually thickened from the inner circumference to the outer circumference.
The second blade disclosed in Japanese Unexamined Utility Model Publication No. 57-1 57788 has a blade whose curvature on the back surface is smaller than the curvature on the ventral surface, and the blade is formed into an upwardly curved crescent cross section that is symmetrical in the chord length direction. In the third Utility Model Publication No. 63-54892, the size of the cross section of the flow path formed between adjacent blades is gradually equalized from the inner end to the vicinity of the outer end of the blade. It has a thick wall, and is laterally formed so that it gradually becomes thinner from near the outer open end to the outer end. (A problem that the invention aims to solve!!) However, the conventional first and second cross-sectional shapes as described above are simply blade cross-sectional shapes, and the air in the suction opening and discharge measurement is It does not take into account the air resistance associated with the flow. In addition, the third method is such that the suction side and the discharge side in the flow path cross section are almost constant, but it takes into account the different flow velocities due to centrifugal action between the inner circumference and the outer circumference. I haven't. Furthermore, the suction and discharge ends of each of these are shaped into sharp edges with gradually thinner cross-sections to reduce resistance to air flow. However, if the end is made sharp, turbulence is more likely to occur, noise becomes louder, and the air quality deteriorates.
そこで、本発明は、叙上のような従来存した諸事情に鑑
み創出されたもので、円周状に沿って横架列設される多
数の羽根において、その吸込側、吐出測の端部を断面で
ほぼ半円形状を呈するように形或し、しかも、内周であ
る吸込側でのそれを外周である吐出測のそれに比しほぼ
２倍の曲率半径とすることにより、吸込側、吐出側での
空気抵抗を小さくし、円滑な空気流を実現して空気特性
を良好にし、騒音の発生を抑制できる遠心ファンを提供
することを目的とする．
（課題を解決するための手段）
上述した目的を達或するため、本発明にあっては、左右
の開板１相互間に多数の羽根２を横架列設して成る遠心
ファンであり、この遠心ファンにおいて、羽根２は、吸
込側が肉厚となる非対称で、吸込側から吐出側へ至る湾
曲した背面、腹面を有し、吸込閲端部５、吐出側端部６
両者が断面でほぼ半円形状を呈し、吸込開端部５は、吐
出側端部６に比しその曲率半径をほぼ２倍にしてあるこ
とを特徴とする．
〈作用〉
本発明に係る遠心ファンにあっては、吸込関端部５の曲
率半径は吐出側端部６のそれに比し、ほぼ２倍程度に形
威されているから、内周に位置する吸込側端部５付近に
おける吸込み空気に対する吸込み抵抗を減少させて空気
流入を円滑にする．また、吐出される空気は、外周に位
置する吐出ＩＩ！Ｉ端部６において、羽根２自体の背面
、腹面に沿って流速が増大されながら円滑に流れるので
あり、そのため、剥離を容易にして吐出し時に生じる乱
流を減少させ、騒音の発生を抑制する．（ 実方龜 ０
１１ ）
以下、図面を参照して本発明の一実施例を説明する．
図において示される符号１は左右で対峙状に配されるほ
ぼ円形状を呈する測板であり、この側板１の中央部には
、所定のファン軸に取り付けるためのボス等が形戒され
ている。Therefore, the present invention has been created in view of the conventional circumstances as described above, and it has been proposed to provide a large number of blades arranged horizontally along the circumference. By shaping it so that it has an almost semicircular cross-section, and by making the radius of curvature on the suction side, which is the inner periphery, approximately twice that of the discharge measurement, which is the outer periphery, the suction side, The purpose of this project is to provide a centrifugal fan that can reduce air resistance on the discharge side, achieve smooth airflow, improve air characteristics, and suppress noise generation. (Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a centrifugal fan in which a large number of blades 2 are horizontally arranged between the left and right open plates 1. In the centrifugal fan, the blades 2 are asymmetrical with a thick wall on the suction side, have a curved back surface and a ventral surface extending from the suction side to the discharge side, and have a suction end 5 and a discharge end 6.
Both have a substantially semicircular cross section, and the suction open end 5 has a radius of curvature approximately twice that of the discharge end 6. <Function> In the centrifugal fan according to the present invention, the radius of curvature of the suction end 5 is approximately twice as large as that of the discharge end 6. The suction resistance to the suction air near the suction side end 5 is reduced to ensure smooth air inflow. Moreover, the discharged air is discharged from the discharge II! located on the outer periphery. At the I end 6, the flow velocity is increased and flows smoothly along the back and ventral surfaces of the blade 2 itself, which facilitates separation, reduces turbulence that occurs during discharge, and suppresses noise generation. ．． (Actual head 0
11) An embodiment of the present invention will be described below with reference to the drawings. The reference numeral 1 shown in the figure is a nearly circular measuring plate arranged facing each other on the left and right sides, and a boss etc. for attaching to a predetermined fan shaft is marked in the center of this side plate 1. .
これらの左右の側板１相互間には、その円周状に沿って
多数の羽根２が横架状に取付けられており、羽根２自体
は、ファン軸心に対する取付角度、側板１に対する取付
方法、材質をアルミニウム、合成樹脂その他とすること
等は従来と異なるところはない．
この羽根２は、第２図に示すような断面形状に形成され
ており、その背面、腹面はともに突状の湾曲面を呈する
．そして、腹面は、測板１の内周である吸込側端部５か
ら外周である吐出側端部６に至るまで中心を同一とする
連続した同一の湾曲面となっている．また、背面は、吸
込側湾曲面３と吐出側湾曲面４とが連続した複合湾曲面
となっており、吸込側湾曲面３は吐出開湾曲面４のそれ
に比しやや小さい曲率半径での湾曲面とし、これらの湾
曲面３．４は吸込開に位置する連続部位で羽根２自体を
肉厚にするようにして連続している．このとき、吸込側
湾曲面３と吐出側湾曲面４との連続部位は、羽根２自体
の直線状の幅において、吸込側端部５から連続部位に至
る長さａと、吐出＠端部６から連続部位に至る長さ ｂ
との比率がほぼ１；３となるようにしてある．
更に、羽根２自体においての吸込側端部５、吐出側端部
６はともに断面半円形状に湾曲しており、前者５の曲率
半径は後者６のそれに比し、ほぼ２倍程度に形成されて
いて、緩やかに湾曲されている．
（発明の効果）
本発明は、以上にように構成されているために、吸込側
端部５、吐出測端部６両者がともに断面でほぼ半円形状
を呈するから、形状抵抗が少なく、吸込み空気、吐出し
空気における乱流、剥離が抑制され、騒音を大きく低減
できる．
しかも、吸込＠端部５の曲率半径は吐出側端部６のそれ
に比し、ほぼ２倍程度に形成されているから、吸込み空
気に対する吸込み抵抗を減少させて空気流入を円滑にし
、また、吐出し空気は、吐出側端部６において、その背
面、腹面に沿って流速が増大されながら円滑に流れ、剥
離を容易にして吐出し時に生じる乱流を減少させる．一
したがって、本発明によれば、吸込側、吐出側での空
気抵抗を小さくし、円滑な空気流を実現して空気特性を
良好にでき、騒音の低減化に寄与する等の優れた効果を
奏するものである．１・・・測板、２・・・羽根、３・
・・吸込側湾曲面、４・・・吐出側湾曲面、５・・・吸
込ｌ１１ｆ！ｔＡ部、６・・・吐出ｌＩＩｆａ部、ａ・
・・吸込側端部から、吸込側湾曲面と吐出側湾曲面との
連続部位に至る長さ、ｂ・・・吐出側端部から、吸込側
湾曲面と吐出圓湾曲面との連続部位に至る長さ．A large number of blades 2 are installed horizontally between the left and right side plates 1 along the circumference thereof, and the blades 2 themselves have different mounting angles with respect to the fan axis, how they are attached to the side plates 1, There is no difference from the conventional model in that the material is aluminum, synthetic resin, etc. The blade 2 is formed to have a cross-sectional shape as shown in FIG. 2, and its back and ventral surfaces both have protruding curved surfaces. The ventral surface is a continuous and identical curved surface having the same center from the suction end 5 which is the inner circumference of the measuring plate 1 to the discharge end 6 which is the outer periphery. In addition, the back surface is a composite curved surface in which the suction side curved surface 3 and the discharge side curved surface 4 are continuous, and the suction side curved surface 3 is curved with a slightly smaller radius of curvature than that of the discharge opening curved surface 4. These curved surfaces 3.4 are continuous so as to make the blade 2 itself thick at a continuous portion located at the suction opening. At this time, the continuous portion of the suction side curved surface 3 and the discharge side curved surface 4 is defined by a length a from the suction side end 5 to the continuous portion in the linear width of the blade 2 itself, and a length a from the suction side end 5 to the continuous portion and the discharge @ end 6. The length from b to the continuous part
The ratio is set to approximately 1:3. Furthermore, the suction side end 5 and the discharge side end 6 of the blade 2 itself are both curved to have a semicircular cross section, and the radius of curvature of the former 5 is approximately twice that of the latter 6. It is curved gently. (Effects of the Invention) Since the present invention is constructed as described above, both the suction side end portion 5 and the discharge measuring end portion 6 have a substantially semicircular cross section. Turbulence and separation in air and discharged air are suppressed, and noise can be significantly reduced. Moreover, since the radius of curvature of the suction end 5 is approximately twice as large as that of the discharge end 6, the suction resistance to the suction air is reduced and air inflow is smoothed, and the At the discharge side end 6, the air flows smoothly along the back and ventral surfaces of the discharge end 6 while the flow velocity is increased, facilitating separation and reducing turbulence generated during discharge. Therefore, according to the present invention, it is possible to reduce the air resistance on the suction side and the discharge side, realize smooth air flow, improve air characteristics, and achieve excellent effects such as contributing to noise reduction. It is something that is played. 1...Measuring plate, 2...Blade, 3.
...Suction side curved surface, 4...Discharge side curved surface, 5...Suction l11f! tA section, 6...Discharge lIIfa section, a.
... Length from the suction side end to the continuous part of the suction side curved surface and the discharge side curved surface, b... From the discharge side end to the continuous part of the suction side curved surface and the discharge round curved surface The length to reach.
Claims (1)
遠心ファンにおいて、羽根は、吸込側が肉厚となる非対
称で、吸込側から吐出側へ至る湾曲した背面、腹面を有
し、吸込側端部、吐出側端部両者が断面でほぼ半円形状
を呈し、吸込側端部は、吐出側端部に比しその曲率半径
をほぼ２倍にしてあることを特徴とする遠心ファン。1. In a centrifugal fan consisting of a large number of blades arranged horizontally between left and right side plates, the blades are asymmetrical with thicker walls on the suction side, and have curved back and ventral surfaces from the suction side to the discharge side. A centrifugal device characterized in that both the suction side end and the discharge side end have a substantially semicircular cross section, and the suction side end has a radius of curvature that is approximately twice that of the discharge side end. fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15384989A JPH0318698A (en) | 1989-06-16 | 1989-06-16 | Centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15384989A JPH0318698A (en) | 1989-06-16 | 1989-06-16 | Centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0318698A true JPH0318698A (en) | 1991-01-28 |
Family
ID=15571447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15384989A Pending JPH0318698A (en) | 1989-06-16 | 1989-06-16 | Centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0318698A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000073661A1 (en) * | 1999-06-01 | 2000-12-07 | Lg Electronics Inc. | Turbo fan |
| JP2012189047A (en) * | 2011-03-14 | 2012-10-04 | Minebea Co Ltd | Impeller, and centrifugal fan provided therewith |
-
1989
- 1989-06-16 JP JP15384989A patent/JPH0318698A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000073661A1 (en) * | 1999-06-01 | 2000-12-07 | Lg Electronics Inc. | Turbo fan |
| JP2012189047A (en) * | 2011-03-14 | 2012-10-04 | Minebea Co Ltd | Impeller, and centrifugal fan provided therewith |
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