JPH10325398A - Axial flow fan - Google Patents
Axial flow fanInfo
- Publication number
- JPH10325398A JPH10325398A JP9138114A JP13811497A JPH10325398A JP H10325398 A JPH10325398 A JP H10325398A JP 9138114 A JP9138114 A JP 9138114A JP 13811497 A JP13811497 A JP 13811497A JP H10325398 A JPH10325398 A JP H10325398A
- Authority
- JP
- Japan
- Prior art keywords
- hub
- opening
- openings
- outer periphery
- air
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
- F04D29/329—Details of the hub
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
- F04D29/682—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps by fluid extraction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
- F04D29/684—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps by fluid injection
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、換気送風機器等に
使用される軸流ファンに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axial fan used for a ventilation blower or the like.
【０００２】[0002]
【従来の技術】従来のこの種の軸流ファンについて図６
および図７を参照しながら説明する。2. Description of the Related Art FIG.
This will be described with reference to FIG.
【０００３】図６に示すように、軸流ファン１０１はハ
ブ１０２の外周に複数のブレード１０３を設け、電動機
１０４のシャフト１０５に取付けられている。そしてハ
ブ１０２はシャフト１０５の取付側の対面は全面開放さ
れているのが通常である。これは軸流ファン１０１の取
付取外しの便と、回転バランス調整用のバランスウェイ
ト（図示せず）の取付を容易にするためである。As shown in FIG. 6, an axial fan 101 has a plurality of blades 103 provided on an outer periphery of a hub 102 and is attached to a shaft 105 of an electric motor 104. Normally, the hub 102 is fully open on the side facing the mounting side of the shaft 105. This is for facilitating attachment and detachment of the axial fan 101 and easy attachment of a balance weight (not shown) for rotational balance adjustment.
【０００４】また図７に示すものはハブ１０６の前面開
放部をカバー１０７で覆ったものである。FIG. 7 shows a hub 106 whose front opening is covered with a cover 107.
【０００５】[0005]
【発明が解決しようとする課題】このような従来の軸流
ファンでは、運転時の気流が矢印のごとくハブ１０２に
当って乱流渦が発生し、送風効率の低下と騒音が増大す
るという課題がある。In such a conventional axial-flow fan, the airflow during operation hits the hub 102 as shown by an arrow, and turbulent vortices are generated, resulting in a decrease in the blowing efficiency and an increase in noise. There is.
【０００６】また、図７に示すハブ１０６のように前面
をカバー１０７で覆った場合も乱流渦は発生し、かつ回
転バランス調整のための検査およびバランスウェイトの
取付作業に手間がかかるようになるという課題もあり、
簡単な構成でこれらの課題を解決することが要求されて
いる。Also, when the front surface is covered with a cover 107 like a hub 106 shown in FIG. 7, a turbulent vortex is generated, and the inspection for adjusting the rotational balance and the work of mounting the balance weight are troublesome. There is also the problem of becoming
It is required to solve these problems with a simple configuration.
【０００７】本発明は、このような従来の課題を解決す
るものであり、運転時の乱流渦を逃がすことにより送風
効率向上と騒音の低下ができる軸流ファンを提供するこ
とを目的としている。An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide an axial fan capable of improving blast efficiency and reducing noise by releasing a turbulent vortex during operation. .
【０００８】[0008]
【課題を解決するための手段】本発明の軸流ファンは上
記目的を達成するために、ハブの前面中央と外周に開口
を設けたものである。SUMMARY OF THE INVENTION In order to achieve the above object, an axial fan according to the present invention has an opening at the center and the outer periphery of the front surface of a hub.
【０００９】本発明によれば、運転時ハブ前面に発生す
る乱流渦を中央の開口から吸い込み、外周の開口より逃
がすことにより、送風効率と騒音を良化することができ
る軸流ファンが得られる。According to the present invention, there is provided an axial fan capable of improving the blowing efficiency and noise by sucking turbulent vortices generated on the front surface of the hub during operation from the central opening and releasing the turbulent vortices from the outer peripheral opening. Can be
【００１０】また、他の手段は、乱流渦を逃がす開口を
ハブ背面の外縁部に設けたものである。Another means is that an opening for releasing the turbulent vortex is provided at the outer edge of the rear surface of the hub.
【００１１】そして本発明によれば上記の発明と同様の
軸流ファンが得られる。According to the present invention, an axial fan similar to the above invention can be obtained.
【００１２】[0012]
【発明の実施の形態】本発明は、ハブに前面開口と外周
開口を設けたものであり、軸流ファンの運転時発する乱
流渦がハブ前面に当ると前面開口に吸い込まれ、外周開
口から出て行くという作用を有する。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a front opening and an outer peripheral opening are provided in a hub. When a turbulent vortex generated during operation of an axial fan hits the front of the hub, the turbulent vortex is sucked into the front opening. It has the effect of going out.
【００１３】また、外周開口の代わりに背面の外縁に開
口を設けたものであっても上記と同じ作用を有する。Also, the same effect as described above can be obtained by providing an opening at the outer edge of the back surface instead of the outer peripheral opening.
【００１４】以下、本発明の実施例について図面を参照
しながら説明する。なお図中、従来例と同一部分につい
ては同一番号を付す。Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawing, the same parts as those of the conventional example are denoted by the same reference numerals.
【００１５】[0015]
（実施例１）図１ないし図３に示すように、軸流ファン
１は、ハブ２の外周に複数のブレード１０３を設け、電
動機１０４のシャフト１０５に取付けられている。そし
てハブ２は平たい円筒の両端を塞いだ形であって、前面
すなわち気流の上流側中央部に円形の前面開口３と、外
周の円周方向に複数の円形の外周開口４が等間隔に設け
られている。(Embodiment 1) As shown in FIGS. 1 to 3, the axial fan 1 has a plurality of blades 103 provided on the outer periphery of a hub 2 and is attached to a shaft 105 of an electric motor 104. The hub 2 has a flat cylindrical shape in which both ends are closed. A circular front opening 3 is provided at a front surface, that is, a central portion on the upstream side of the airflow, and a plurality of circular outer openings 4 are provided at equal intervals in a circumferential direction of the outer periphery. Have been.
【００１６】上記構成において、電動機１０４を運転し
軸流ファン１が回転するとシャフト１０５の軸方向に平
行に気流が発生することで、ハブ２の内外で差圧が生
じ、ハブ２内の空気は外周開口４より流出する。このこ
とによりハブ２の前面の気流は前面開口３より流入し、
ハブ２の前面に発生した乱流渦は消失する。この場合、
外周開口４の総面積は前面開口３と等しいものとする。In the above configuration, when the electric motor 104 is operated and the axial fan 1 rotates, an air flow is generated in parallel with the axial direction of the shaft 105, so that a differential pressure is generated inside and outside the hub 2, and the air inside the hub 2 It flows out from the outer peripheral opening 4. As a result, the airflow in front of the hub 2 flows in through the front opening 3,
The turbulent vortex generated on the front surface of the hub 2 disappears. in this case,
The total area of the outer peripheral opening 4 is equal to the front opening 3.
【００１７】図２は、前面開口３の縁にアール付けをし
てカール部３Ａとすることによって気流の流れを助ける
ものである。そして前面開口３からバランスウェイトの
取付およびファンの軸への取付取外しは容易にできる。FIG. 2 assists the flow of the air flow by making the edge of the front opening 3 rounded to form a curled portion 3A. The attachment of the balance weight and the attachment and removal of the fan to the shaft from the front opening 3 can be easily performed.
【００１８】図３は、外周開口４の下流側の縁に気流の
下流側へ傾斜した面取り部４Ａを設けて排出を助けるも
のである。In FIG. 3, a chamfered portion 4A inclined toward the downstream side of the air flow is provided at the downstream edge of the outer peripheral opening 4 to assist discharge.
【００１９】（実施例２）図４は、ハブ２の背面すなわ
ちシャフト１０５の取付面の外縁寄りに円周方向に複数
の背面開口５を設けたものであり、前面開口３から入っ
た気流はファンの気流と平行して背面開口５から流出す
るものであり、出口における乱れは少なくなる。(Embodiment 2) FIG. 4 shows a case in which a plurality of back openings 5 are provided in the circumferential direction on the back surface of the hub 2, that is, near the outer edge of the mounting surface of the shaft 105. The air flows out of the rear opening 5 in parallel with the airflow of the fan, and turbulence at the outlet is reduced.
【００２０】（実施例３）図５は、前面を開口したハブ
６の外径より一定寸法大きくした外径の円形皿状の前面
部７を同心に取付けることによりハブ６の外周全面にわ
たって間隙部８を設けたものであり、前記２例と同様の
作用を有する。(Embodiment 3) FIG. 5 shows a gap portion over the entire outer periphery of the hub 6 by concentrically mounting a circular dish-shaped front portion 7 having an outer diameter which is larger than the outer diameter of the hub 6 having a front opening. 8 and has the same operation as the above two examples.
【００２１】以上の諸構成により、従来構造のハブに比
して発生騒音は実験の結果特に耳障りである５００Hz〜
１０００Hzの周波数域において１〜１．６ｄＢ低下する
ものである。これは乱流渦が減少することによってその
渦の周波数成分が低減することに他ならない。With the above-described various configurations, the noise generated is 500 Hz to 500 Hz which is particularly annoying as a result of the experiment as compared with the hub having the conventional structure.
In the frequency range of 1000 Hz, the frequency decreases by 1 to 1.6 dB. This is nothing but the reduction of turbulent vortices, which reduces the frequency components of the vortices.
【００２２】[0022]
【表１】 [Table 1]
【００２３】[0023]
【発明の効果】以上の実施例から明らかなように本発明
によれば、運転することにより発生する気流のうちハブ
前面に当り乱流渦となるものを前面開口から取り入れ外
周開口から逃がし、乱流渦による騒音の発生を低下させ
環境改善を行うと共に、整流作用により送風効率も改善
できる効果のある軸流ファンを提供できる。As is apparent from the above embodiment, according to the present invention, of the airflow generated by the operation, the turbulent vortex that hits the front surface of the hub and is taken in from the front opening and escapes from the outer peripheral opening, It is possible to provide an axial fan that has the effect of reducing the generation of noise due to the flow vortex, improving the environment, and improving the blowing efficiency by rectification.
【図１】本発明の実施例１の基本構造を示す要部断面図FIG. 1 is a sectional view of a main part showing a basic structure of a first embodiment of the present invention.
【図２】同前面開口の変化を示す要部断面図FIG. 2 is a sectional view of a main part showing a change of the front opening.
【図３】同外周開口の変化を示す要部断面図FIG. 3 is a sectional view of a main part showing a change in the outer peripheral opening;
【図４】本発明の実施例２の構造を示す要部断面図FIG. 4 is a sectional view of a main part showing a structure of a second embodiment of the present invention.
【図５】同実施例３の構造を示す要部断面図FIG. 5 is a sectional view of a main part showing the structure of the third embodiment.
【図６】従来の軸流ファンの構造を示す要部断面図FIG. 6 is a sectional view of a main part showing the structure of a conventional axial fan.
【図７】同他の構造を示す要部断面図FIG. 7 is a cross-sectional view of a main part showing another structure.
１ 軸流ファン ２ ハブ ３ 前面開口 ３Ａ カール部 ４ 外周開口 ４Ａ 面取り部 ５ 背面開口 ６ ハブ ７ 前面部 ８ 間隙部 REFERENCE SIGNS LIST 1 axial fan 2 hub 3 front opening 3A curl portion 4 outer peripheral opening 4A chamfered portion 5 back opening 6 hub 7 front portion 8 gap
Claims (2)
周の円周方向に設けた複数の外周開口を備えた軸流ファ
ン。1. An axial fan having a front opening provided at the center of the front surface of a hub and a plurality of outer peripheral openings provided in a circumferential direction of the outer periphery.
求項１記載の軸流ファン。2. The axial flow fan according to claim 1, wherein the outer peripheral opening is provided at an outer edge of the rear surface of the hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13811497A JP4083259B2 (en) | 1997-05-28 | 1997-05-28 | Axial fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13811497A JP4083259B2 (en) | 1997-05-28 | 1997-05-28 | Axial fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10325398A true JPH10325398A (en) | 1998-12-08 |
| JP4083259B2 JP4083259B2 (en) | 2008-04-30 |
Family
ID=15214293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13811497A Expired - Fee Related JP4083259B2 (en) | 1997-05-28 | 1997-05-28 | Axial fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4083259B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387918C (en) * | 2003-11-29 | 2008-05-14 | Lg电子株式会社 | Blowing fan and refrigerator having the same |
| WO2014054132A1 (en) * | 2012-10-03 | 2014-04-10 | 三菱電機株式会社 | Propeller fan |
| CN106122090A (en) * | 2016-08-12 | 2016-11-16 | 珠海格力电器股份有限公司 | Axial flow wind wheel and axial flow fan |
-
1997
- 1997-05-28 JP JP13811497A patent/JP4083259B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387918C (en) * | 2003-11-29 | 2008-05-14 | Lg电子株式会社 | Blowing fan and refrigerator having the same |
| WO2014054132A1 (en) * | 2012-10-03 | 2014-04-10 | 三菱電機株式会社 | Propeller fan |
| CN106122090A (en) * | 2016-08-12 | 2016-11-16 | 珠海格力电器股份有限公司 | Axial flow wind wheel and axial flow fan |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4083259B2 (en) | 2008-04-30 |
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