JPH05149295A - Fan of axial flow fan motor - Google Patents
Fan of axial flow fan motorInfo
- Publication number
- JPH05149295A JPH05149295A JP3310549A JP31054991A JPH05149295A JP H05149295 A JPH05149295 A JP H05149295A JP 3310549 A JP3310549 A JP 3310549A JP 31054991 A JP31054991 A JP 31054991A JP H05149295 A JPH05149295 A JP H05149295A
- Authority
- JP
- Japan
- Prior art keywords
- fan
- blade
- side edge
- fan motor
- air flow
- 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.)
- Granted
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
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 flow fan motor having noise reducing 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, thinner, smaller, and smaller.
Since these electronic devices are often used in places closely attached to the living space, there is a strong demand for noise reduction of the 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。A conventional axial fan motor will be described below. FIG. 5 shows the configuration of a conventional axial fan motor. As shown in FIGS. 5 (a) and 5 (b), the housing 1 has an outer frame portion 2 forming a cylindrical ventilation passage, a plurality of spokes 3, and a central flange portion 7, in which 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 passage 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 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 a blade-shaped cross section,
A tip surface 9 formed at the tip of the outer periphery 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 driving portion is excited and the rotor 5 rotates, an air flow is generated by the fan 4 and the air is blown out from the ventilation passage of the housing 1.
【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 driving portion is excited and the fan 4 rotates to enter the air blowing state, the velocity of the air flow is particularly high on the negative pressure surface of the fan blade 8 tip portion. 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 influence of the secondary flow between the blades, and this portion has a large loss, and the separation of the flow easily occurs, and the air flow is generated on the fan blade 8 surface. I will leave more. Vortices are generated in the separation area, which increases turbulent noise, resulting in deterioration of noise level and static pressure-air volume characteristics (hereinafter referred to as PQ characteristics).
【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。The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an axial fan motor fan capable of achieving low noise and improving 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 has a blade suction surface side edge and a blade pressure surface side on a tip surface formed at an outer peripheral tip portion of a fan blade. It has a configuration in which at least one notch connecting with the edge is formed.
【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 suction surface of the fan blade tip even when the motor is excited and the fan is rotated to blow air. When a low energy region occurs and separation is about to occur, energy can be supplied to the tip negative pressure surface from the blade pressure surface side, which is a high energy region, through the notch, and the separation occurs at a location after the flow. It becomes possible to move to the flow 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 designated 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部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なった結
果、ファン４外径の３％以内としている。As shown in FIG. 1, the fan blades 8 of the fan 4 extend from the shaft 6 toward the inner peripheral portion of the housing and have a blade-shaped cross section. A plurality of triangular notches 13 connecting the blade suction surface side edge 10 and the blade pressure surface side edge 11 in the axial direction of the shaft 6 are formed on the tip surface 12 formed at the outer peripheral tip portion thereof. The other parts are formed of smooth curved surfaces. If the depth h of the notch 13 in the radial direction is set too large, the function as the airfoil of the fan blade 8 is impaired and the PQ characteristics tend to be deteriorated along with the generation of noise due to leakage vortices. As a result of estimating the optimum value, it is 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 constructed as described above will be described with reference to FIG.
When the fan 4 rotates, the state of the air flow at the outer peripheral tip of the fan blade 8 changes from the blade pressure surface side edge 11 to the blade suction surface side edge 10 through the notch 13 as shown in FIG. The point where separation occurs due to energy supply can be shifted to the blade trailing edge side, as shown in FIG.
As shown in (b), separation of the airflow on the surface of the fan blade 8 as in the conventional case 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（ａ）特性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 the present embodiment, by providing the fan blade 8 with the plurality of notches 13, air flow separation on the surface of the fan blade 8 is eliminated, and as shown in FIG. According to the frequency analysis characteristic diagram of
(A) characteristics of the fan of the present invention and conventional fan characteristics (b)
In comparison with, a significant reduction in noise level, that is, turbulent noise, occurs especially in a wide band frequency.
【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。(Second Embodiment) A second embodiment of the present invention will be described below 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１４が形成されている。切
り欠き１４のシャフト６の軸方向の形成は翼弦線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 14 connecting the blade suction surface side edge 10 and the blade pressure surface side edge 11 are formed in the tip surface 12 of the fan blade 8. The notch 14 is formed in the axial direction of the shaft 6 by the chord line A-.
It is perpendicular to A'and has a semi-cylindrical shape. The part of the tip surface 12 other than the notch 14 is formed as a smooth curved surface. Radial depth h of 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 therefore its explanation 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 this embodiment, the first embodiment
The same turbulent noise can be reduced. It is needless to say that the shape and the axial direction of the cutout portion are not limited to the first and second embodiments given here, and other shapes and other axial directions may be used.
【００１７】[0017]
【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 embodiments, the present invention provides a blade suction surface side edge and a blade pressure surface side edge at the tip surface formed on the outer peripheral tip portion of the fan blade of the axial fan motor. With a very simple structure such as forming at least one notch that connects with, it becomes possible to move the separation occurrence location to the more downstream side of the flow, and thus the air generated on the blade suction surface side in the related art can be moved. Reduces the flow separation area, reduces turbulent noise due to vortex generation,
As a result, it is possible to realize a fan of an axial fan motor that can improve the PQ characteristics.
【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 sectional view showing an air flow on the fan blade surface, and FIG. 3B is a sectional view showing an air flow 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 the 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 Negative Pressure Side Edge 11 Blade Pressure Side Edge 12 Tip Surface 13 Notch 14 Notch
Claims (3)
る先端面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してなる軸流
ファンモータのファン。1. A fan for an axial-flow fan motor, wherein at least one notch connecting a blade negative pressure surface side edge and a blade pressure surface side edge is formed on a tip surface formed at an outer peripheral tip portion of a fan blade. ..
る先端面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箇所以上に三角形または半円筒状の切り
欠きを形成してなる請求項１記載の軸流ファンモータの
ファン。2. A triangular or semi-cylindrical notch is formed in at least one location connecting the blade suction surface side edge and the blade pressure surface side edge on the tip surface formed at the outer peripheral tip portion of the fan blade. A fan for an axial fan motor according to claim 1.
径方向深さがファン外径の３％以内となる請求項１また
は請求項２記載の軸流ファンモータのファン。3. The fan for an axial fan motor according to claim 1, wherein the radial depth of the triangular or semi-cylindrical notch is within 3% of the fan outer diameter.
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 true JPH05149295A (en) | 1993-06-15 |
| JP2924372B2 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) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000052182A (en) * | 1999-01-30 | 2000-08-16 | 윤종용 | Fan assembly |
| WO2009008513A1 (en) * | 2007-07-11 | 2009-01-15 | Daikin Industries, Ltd. | Propeller fan |
| CN102374194A (en) * | 2011-11-10 | 2012-03-14 | 广东美的电器股份有限公司 | Axial flow wind wheel |
| WO2020209196A1 (en) * | 2019-04-12 | 2020-10-15 | 山洋電気株式会社 | Fan frame structure for axial flow fan |
| CN114867944A (en) * | 2019-12-09 | 2022-08-05 | Lg电子株式会社 | Air blower |
-
1991
- 1991-11-26 JP JP31054991A patent/JP2924372B2/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000052182A (en) * | 1999-01-30 | 2000-08-16 | 윤종용 | Fan assembly |
| WO2009008513A1 (en) * | 2007-07-11 | 2009-01-15 | Daikin Industries, Ltd. | Propeller fan |
| US8512004B2 (en) | 2007-07-11 | 2013-08-20 | Daikin Industries, Ltd. | Propeller fan |
| EP2175141A4 (en) * | 2007-07-11 | 2016-08-31 | Daikin Ind Ltd | Propeller fan |
| CN102374194A (en) * | 2011-11-10 | 2012-03-14 | 广东美的电器股份有限公司 | Axial flow wind wheel |
| CN102374194B (en) * | 2011-11-10 | 2017-05-10 | 美的集团股份有限公司 | Axial flow wind wheel |
| WO2020209196A1 (en) * | 2019-04-12 | 2020-10-15 | 山洋電気株式会社 | Fan frame structure for axial flow fan |
| CN114867944A (en) * | 2019-12-09 | 2022-08-05 | Lg电子株式会社 | Air blower |
| CN114867944B (en) * | 2019-12-09 | 2024-01-26 | Lg电子株式会社 | Blower fan |
| US11959488B2 (en) | 2019-12-09 | 2024-04-16 | Lg Electronics Inc. | Blower |
| US12038016B2 (en) | 2019-12-09 | 2024-07-16 | Lg Electronics Inc. | Blower |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2924372B2 (en) | 1999-07-26 |
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