JP2924372B2 - Axial fan motor fan - Google Patents
Axial fan motor fanInfo
- Publication number
- JP2924372B2 JP2924372B2 JP31054991A JP31054991A JP2924372B2 JP 2924372 B2 JP2924372 B2 JP 2924372B2 JP 31054991 A JP31054991 A JP 31054991A JP 31054991 A JP31054991 A JP 31054991A JP 2924372 B2 JP2924372 B2 JP 2924372B2
- Authority
- JP
- Japan
- Prior art keywords
- fan
- blade
- axial
- edge
- fan motor
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は低騒音化手段をもつ軸流
ファンモータのファンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan for an axial fan motor having noise reduction means.
【0002】[0002]
【従来の技術】近年OA電子機器の軽薄短小化が進み、
これらの電子機器が生活空間に密着した場所で使用され
ることが多いことから、これに組み込まれる軸流ファン
モータの低騒音化が強く要望されている。2. Description of the Related Art In recent years, OA electronic devices have become lighter and thinner and smaller.
Since these electronic devices are often used in a place close to a living space, there is a strong demand for lowering the noise of an axial fan motor incorporated therein.
【0003】以下に従来の軸流ファンモータについて説
明する。図5は従来の軸流ファンモータの構成を示すも
のである。図5(a),(b)に示すように、ハウジン
グ1は円筒状の通風路を形成する外枠部2と複数のスポ
ーク3、中央フランジ部7をもち、その内部に制御回
路,ステータコア,巻き線などのモータ駆動部分(図示
せず)と、この通風路内で回転するように設置され、外
周にファン4を有するファンロータ5を配し、ファンロ
ータ5のシャフト6を保持してなる軸受け機構を前記中
央フランジ部7で支持した構成となっている。ファン4
のファンブレード8はシャフト6側からハウジング1内
周部に向かって伸び、かつ翼形の横断面を有しており、
その外周先端部に形成される先端面9は翼負圧面側エッ
ジ10から翼圧力面側エッジ11に向かって平滑な曲面
で形成されている。[0003] A conventional axial fan motor will be described below. FIG. 5 shows a configuration of a conventional axial fan motor. As shown in FIGS. 5A and 5B, the housing 1 has an outer frame portion 2 forming a cylindrical ventilation path, a plurality of spokes 3, and a central flange portion 7, and a control circuit, a stator core, A motor driving portion (not shown) such as a winding, and a fan rotor 5 which is installed so as to rotate in the ventilation path and has a fan 4 on the outer periphery are arranged, and a shaft 6 of the fan rotor 5 is held. The bearing mechanism is configured to be supported by the central flange portion 7. Fan 4
Fan blade 8 extends from the shaft 6 side toward the inner peripheral portion of the housing 1 and has an airfoil cross section.
The tip surface 9 formed at the outer peripheral tip portion is formed as a smooth curved surface from the blade suction surface side edge 10 to the blade pressure surface side edge 11.
【0004】以上のように構成された軸流ファンモータ
について、以下その動作を説明する。モータ駆動部が励
磁されロータ5が回転することにより、ファン4により
空気流が生じ、ハウジング1の通風路より噴出する送風
状態になる。The operation of the axial fan motor configured as described above will be described below. When the motor drive unit is excited and the rotor 5 rotates, an airflow is generated by the fan 4, and the housing 1 enters a blowing state in which the air is blown out from the ventilation path.
【0005】[0005]
【発明が解決しようとする課題】しかしながら上記のよ
うな構成では、モータ駆動部が励磁されファン4が回転
し送風状態となった場合、特にファンブレード8先端部
負圧面上において空気流の速度が速くなり、これが圧力
エネルギーに変換される翼後縁側に翼間二次流れの影響
による低エネルギー領域が発生し、この部分は損失も大
きく、流れの剥離が生じ易く、空気流がファンブレード
8面より離脱してしまう。その離脱領域には渦発生が起
き、これにより乱流騒音を増加させ、騒音レベル並びに
静圧−風量特性(以下P−Q特性とする)の悪化を招く
という問題点があった。However, in the above configuration, when the motor drive section is excited and the fan 4 is rotated to be in the air blowing state, the speed of the air flow particularly on the negative pressure surface at the tip of the fan blade 8 is reduced. It becomes faster, and this is converted into pressure energy. A low energy region is generated on the trailing edge side of the blade due to the effect of the secondary flow between the blades. Will be more detached. A vortex is generated in the departure area, thereby increasing turbulent noise and causing a problem that the noise level and the static pressure-air volume characteristic (hereinafter referred to as PQ characteristic) are deteriorated.
【0006】本発明は上記従来の問題点を解決するもの
であり、低騒音化が図れ、しかもP−Q特性の向上を実
現する軸流ファンモータファンの提供を目的とするもの
である。An object of the present invention is to solve the above-mentioned conventional problems, and it is an object of the present invention to provide an axial fan motor fan that can reduce noise and improve PQ characteristics.
【0007】[0007]
【課題を解決するための手段】この目的を達成するため
に本発明の軸流ファンモータのファンはファンブレード
の外周先端部に形成される先端面の翼前縁と、翼後縁の
途中に、翼負圧面側エッジと翼圧力面側エッジとを結ぶ
少なくとも1箇所以上の切り欠きを形成させた構成を有
している。In order to achieve this object, a fan of an axial flow fan motor according to the present invention comprises a fan front edge formed on a front end portion formed on an outer circumferential front end portion of a fan blade, and a fan front edge formed on a blade rear edge.
At least one notch connecting the blade negative pressure surface side edge and the blade pressure surface side edge is formed on the way.
【0008】[0008]
【作用】この構成において、ファンブレードはモータ駆
動部が励磁されファンが回転し送風状態となった場合に
も、前記ファンブレード先端部負圧面上において翼後縁
側に翼間二次流れの影響による低エネルギー領域が生
じ、剥離が発生しようとする際に、高エネルギー領域で
ある翼圧力面側から切り欠きを通して前記先端部負圧面
上にエネルギー補給ができることとなり、剥離の発生場
所を流れのより後流側へ移動させることが可能となる。In this configuration, the fan blade is affected by the secondary flow between blades on the trailing edge side of the blade on the negative pressure surface at the tip of the fan blade even when the motor drive section is excited and the fan rotates to blow air. When a low energy region is generated and separation is about to occur, energy can be supplied to the tip negative pressure surface through the notch from the blade pressure surface side, which is a high energy region, so that the separation occurs after the flow. It can be moved to the downstream side.
【0009】[0009]
(実施例1)以下本発明の一実施例について、図面を参
照しながら説明する。なお従来例と同一構成部材には同
一符号を用いる。(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals.
【0010】図1に示すように、ファン4のファンブレ
ード8はシャフト6からハウジング内周部に向かって伸
び、かつ、翼形の横断面を有している。その外周先端部
に形成される先端面12の翼前縁と翼後縁の途中には、
シャフト6の軸方向に翼負圧面側エッジ10と翼圧力面
側エッジ11とを結ぶ複数の三角形状の切り欠き13が
形成してあり、それ以外の部分については平滑な曲面で
形成されている。切り欠き13の半径方向の深さhは、
あまり大きくとりすぎると、ファンブレード8の翼形と
して機能を損ない、漏れ渦による騒音発生とともにP−
Q特性を悪化させる傾向にあるので種々の実験から最適
値の推測を行った結果、ファン4外径の3%以内として
いる。As shown in FIG. 1, the fan blade 8 of the fan 4 extends from the shaft 6 toward the inner periphery of the housing and has an airfoil cross section. In the middle of the wing leading edge and the wing trailing edge of the tip surface 12 formed at the outer circumferential tip,
A plurality of triangular cutouts 13 are formed in the axial direction of the shaft 6 to connect the blade suction surface side edge 10 and the blade pressure surface side edge 11, and the other portions are formed as smooth curved surfaces. . The radial depth h of the notch 13 is
If it is too large, the function of the fan blade 8 as an airfoil will be impaired, and noise due to leakage vortex will be generated, and P-
Since the Q characteristic tends to be deteriorated, the optimum value is estimated from various experiments, and as a result, it is set to within 3% of the outer diameter of the fan 4.
【0011】以上のように構成された軸流ファンモータ
のファンについて、図3を用いてその動作を説明する。
ファン4が回転するとファンブレード8の外周先端部に
おける空気流の流れの状態は、図3(a)に示すよう
に、翼圧力面側エッジ11から切り欠き13を通して翼
負圧面側エッジ10へのエネルギー補給により剥離の発
生するポイントを翼後縁側にずらすことができ、図3
(b)に示すように、従来のようなファンブレード8面
での空気流の剥離を抑えることになる。The operation of the fan of the axial fan motor configured as described above will be described with reference to FIG.
When the fan 4 rotates, the state of the airflow at the outer peripheral tip of the fan blade 8 is changed from the blade pressure side edge 11 to the blade suction side edge 10 through the notch 13 as shown in FIG. The point at which separation occurs due to energy replenishment can be shifted to the trailing edge of the wing.
As shown in (b), the separation of the air flow on the surface of the fan blade 8 as in the related art is suppressed.
【0012】以上のように本実施例によれば、ファンブ
レード8に複数の切り欠き13を設けることにより、フ
ァンブレード8面での空気流の剥離がなくなり、図4に
示すように、騒音レベルの周波数分析特性図によれば、
本発明のファンの特性(a)と従来のファン特性(b)
との比較では、特に広帯域の周波数における騒音レベ
ル、つまり乱流騒音の大幅な低減が生じている。As described above, according to this embodiment, by providing a plurality of cutouts 13 in the fan blade 8, separation of the air flow on the surface of the fan blade 8 is eliminated, and as shown in FIG. According to the frequency analysis characteristic diagram of
Characteristics (a) of the fan of the present invention and characteristics (b) of the conventional fan
In comparison with the above, a large reduction in the noise level, that is, the turbulent noise, especially at a wide band frequency has occurred.
【0013】(実施例2)以下本発明の第2の実施例に
ついて図面を参照しながら説明する。(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.
【0014】図2に示すように、ファンブレード8の先
端面12の翼前縁と翼後縁の途中には翼負圧面側エッジ
10と翼圧力面側エッジ11とを結ぶ複数の切り欠き1
4が形成されている。切り欠き14の形成軸方向は翼弦
線A−A’に対して垂直方向であるとともに形状も半円
筒形である。先端面12の切り欠き14以外の部分は平
滑な曲面で形成されている。切り欠き14の半径方向深
さhは、実施例1と同様ファン4外径の3%以内として
いる。As shown in FIG. 2, a plurality of notches 1 connecting the blade suction side edge 10 and the blade pressure side edge 11 are provided in the middle of the blade leading edge and the blade trailing edge of the tip surface 12 of the fan blade 8.
4 are formed. The axial direction of the notch 14 is perpendicular to the chord line AA ', and the shape is a semi-cylindrical shape. The portion other than the notch 14 of the tip surface 12 is formed as a smooth curved surface. The radial depth h of the notch 14 is within 3% of the outer diameter of the fan 4 as in the first embodiment.
【0015】以上のように構成された軸流ファンモータ
のファンの動作は実施例1と同じであるので説明は省略
する。The operation of the fan of the axial fan motor configured as described above is the same as that of the first embodiment, and the description is omitted.
【0016】以上のように本実施例によれば、実施例1
と同じ乱流騒音の低減ができる。なお、切り欠き部の形
状及び形成軸方向についてはここに掲げた第1,第2の
実施例だけにとどまらず他の形状および他の軸方向とし
ても良いことは言うまでもない。As described above, according to the present embodiment, the first embodiment
The same turbulence noise can be reduced. It is needless to say that the shape and the axial direction of the notch are not limited to the first and second embodiments, but may be other shapes and other axial directions.
【0017】[0017]
【発明の効果】以上の実施例の説明により明らかなよう
に本発明は、軸流ファンモータのファンブレードの外周
先端部に形成される先端面の翼前縁と翼後縁の途中に、
翼負圧面側エッジと翼圧力面側エッジとを結ぶ少なくと
も1箇所以上の切り欠きを形成させるといった極めて簡
単な構造によって、剥離の発生場所を流れのより後流側
へ移動させることが可能となり、これにより従来の翼負
圧面側に生じる空気流の離脱領域を減少せしめ、渦発生
による乱流騒音を低減し、ひいてはP−Q特性の向上も
図ることができる軸流ファンモータのファンを実現でき
るものである。As is apparent from the above description of the embodiment, the present invention is characterized in that the tip surface formed at the tip of the outer periphery of the fan blade of the axial fan motor is provided between the leading edge and the trailing edge of the blade .
With a very simple structure of forming at least one notch connecting the blade suction surface side edge and the blade pressure surface side edge, it is possible to move the place where separation occurs to a more downstream side of the flow, As a result, it is possible to realize a conventional fan of the axial flow fan motor which can reduce the departure region of the air flow generated on the negative pressure side of the blade, reduce turbulent noise due to vortex generation, and improve PQ characteristics. Things.
【図1】本発明の第1の実施例の軸流ファンモータのフ
ァンの斜視図FIG. 1 is a perspective view of a fan of an axial fan motor according to a first embodiment of the present invention.
【図2】本発明の第2の実施例の軸流ファンモータのフ
ァンの斜視図FIG. 2 is a perspective view of a fan of an axial fan motor according to a second embodiment of the present invention.
【図3】(a)は同ファンブレード面の空気流を示す断
面図 (b)は従来のファンブレード面の空気流を示す断面図FIG. 3A is a cross-sectional view showing an airflow on the fan blade surface, and FIG. 3B is a cross-sectional view showing an airflow on a conventional fan blade surface.
【図4】本発明の軸流ファンモータの騒音レベルの周波
数分析特性図FIG. 4 is a frequency analysis characteristic diagram of a noise level of the axial fan motor of the present invention.
【図5】(a)は従来の軸流ファンモータの斜視図 (b)は同軸流ファンモータのファンロータの斜視図5A is a perspective view of a conventional axial fan motor, and FIG. 5B is a perspective view of a fan rotor of a coaxial fan motor.
4 ファン 8 ファンブレード 10 翼負圧面側エッジ 11 翼圧力面側エッジ 12 先端面 13 切り欠き 14 切り欠き 4 Fan 8 Fan Blade 10 Blade Pressure Side Edge 11 Blade Pressure Side Edge 12 Tip Surface 13 Notch 14 Notch
Claims (3)
る先端面の翼前縁と翼後縁との途中に、前記翼前縁と前
記翼後縁を含まない翼負圧側エッジと翼圧力側エッジと
を結ぶ少なくとも1箇所以上の切り欠きを形成してなる
軸流ファンモータのファン。1. A wing leading edge and a wing leading edge formed in a tip end surface formed at an outer peripheral tip portion of a fan blade in the middle of the wing leading edge and the wing trailing edge.
A fan for an axial flow fan motor having at least one notch connecting a blade suction side edge and a blade pressure side edge that do not include the blade trailing edge .
としてなる請求項1記載の軸流ファンモータのファン。2. The shape of the notch is triangular or semi-cylindrical.
And then axial fan fan motor according to claim 1, wherein comprising.
向深さがファン外径の3%以内となる請求項2記載の軸
流ファンモータのファン。3. A fan for an axial fan motor according to claim 2, wherein the radial depth of the triangular or semi-cylindrical cutout is within 3% of the outer diameter of the fan.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31054991A JP2924372B2 (en) | 1991-11-26 | 1991-11-26 | Axial fan motor fan |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31054991A JP2924372B2 (en) | 1991-11-26 | 1991-11-26 | Axial fan motor fan |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05149295A JPH05149295A (en) | 1993-06-15 |
JP2924372B2 true JP2924372B2 (en) | 1999-07-26 |
Family
ID=18006577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31054991A Expired - Lifetime JP2924372B2 (en) | 1991-11-26 | 1991-11-26 | Axial fan motor fan |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2924372B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20000052182A (en) * | 1999-01-30 | 2000-08-16 | 윤종용 | Fan assembly |
JP5125518B2 (en) * | 2007-07-11 | 2013-01-23 | ダイキン工業株式会社 | Propeller fan |
CN102374194B (en) * | 2011-11-10 | 2017-05-10 | 美的集团股份有限公司 | Axial flow wind wheel |
JP2020172913A (en) * | 2019-04-12 | 2020-10-22 | 山洋電気株式会社 | Fan frame structure for axial flow fan |
CN114829782B (en) * | 2019-12-09 | 2024-04-05 | Lg电子株式会社 | Blower |
-
1991
- 1991-11-26 JP JP31054991A patent/JP2924372B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH05149295A (en) | 1993-06-15 |
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