JP2001182698A - Venturi of axial fan - Google Patents
Venturi of axial fanInfo
- Publication number
- JP2001182698A JP2001182698A JP36427399A JP36427399A JP2001182698A JP 2001182698 A JP2001182698 A JP 2001182698A JP 36427399 A JP36427399 A JP 36427399A JP 36427399 A JP36427399 A JP 36427399A JP 2001182698 A JP2001182698 A JP 2001182698A
- Authority
- JP
- Japan
- Prior art keywords
- arc surface
- circular arc
- mounting hole
- venturi
- diameter
- 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
- 230000002093 peripheral effect Effects 0.000 abstract description 8
- 230000000452 restraining effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、軸流ファンのベンチュ
リー、特に吸込口側・吐出口側双方に、夫々取付孔を有
するフランジを備え、実装に際し吸込口側取付孔が利用
されず空孔のまま実装されることのある軸流ファンのベ
ンチュリーでの、静穏化に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilator of an axial flow fan, in particular, both the suction port side and the discharge port side are provided with flanges each having a mounting hole. Regarding quieting at the venturi of an axial fan that may be implemented as it is.
【０００２】[0002]
【従来の技術】図６は本発明に係る軸流ファン１の例の
断面図で、図７がその正面図である。ベンチュリーに
は、吸込口側、吐出口側いずれでも実装可能なように両
側に夫々取付孔を有するフランジ２−１が設けられてい
る。FIG. 6 is a sectional view of an example of an axial fan 1 according to the present invention, and FIG. 7 is a front view thereof. The venturi is provided with flanges 2-1 each having a mounting hole on each side so as to be mountable on both the suction port side and the discharge port side.
【０００３】図５は、従来技術に成る上述フランジ２−
１に形成されている取付孔２−１１を示す要部断面図
で、該例は取付孔２−１１の内壁がそのまま表面まで伸
長し、その端縁がほぼ直角を示す侭のものであるが、当
該ベンチュリーが樹脂成型によるものではバリ除去のた
め、面取り加工されることもある。FIG. 5 shows the above-mentioned flange 2-2 according to the prior art.
1 is a cross-sectional view of a main part showing a mounting hole 2-11 formed in FIG. 1; in this example, the inner wall of the mounting hole 2-11 extends to the surface as it is, and its end edge shows a substantially right angle; If the venturi is formed by resin molding, it may be chamfered to remove burrs.
【０００４】[0004]
【発明が解決しようとする課題】詳細は省くが上述の如
き従来の構成は、図６を参照して、羽根車の転回により
吸込口から流入する空気は、フランジ面に沿った放射方
向からの、円筒状風洞部に流入する流れを含み、該端部
の円弧面Ｒ’での整流を得ながらも風洞端部で風洞部投
影面からの軸方向に流入する流れとの合流で乱れが生
じ、これが笛吹き音として知られるノイズの一因となっ
ている。Although the details are omitted, in the above-described conventional configuration, referring to FIG. 6, the air flowing in from the suction port due to the rotation of the impeller is directed from the radial direction along the flange surface. Including the flow flowing into the cylindrical wind tunnel, the turbulence occurs at the end of the wind tunnel at the end of the wind tunnel while merging with the flow flowing in the axial direction from the wind tunnel projection surface while obtaining rectification at the arc surface R '. This contributes to the noise known as whistling noise.
【０００５】[0005]
【課題を解決するための手段】本発明に成る軸流ファン
のベンチュリーは、両面にフランジを備え、円筒状風洞
部吸込口側端縁が円弧面を成すと共に吸込口側フランジ
の取付孔周縁も小径円弧面を有し、その半径が、前記取
付孔径の１／１１を越え１／３．５以下、もしくは該小
径円弧面のフランジ表面連接部から羽根車の転回外周円
弧面までの距離が羽根車外径の１／１７〜１／１０であ
って、該小径円弧面のフランジ表面連接部から羽根車の
転回外周円弧面までの距離の１／１３を越え１／５以下
であるように形成され、SUMMARY OF THE INVENTION A venturi of an axial fan according to the present invention has flanges on both sides, the cylindrical wind tunnel inlet side edge forms an arcuate surface, and the periphery of the mounting hole of the inlet side flange also has an arc. A small-diameter arc surface whose radius is greater than 1/11 of the mounting hole diameter and equal to or less than 1 / 3.5, or the distance from the flange surface connecting portion of the small-diameter arc surface to the turning outer circular arc surface of the impeller is It is formed so as to be 1/17 to 1/10 of the outer diameter of the vehicle and more than 1/13 and not more than 1/5 of the distance from the flange surface connecting portion of the small-diameter arc surface to the turning outer circular arc surface of the impeller. ,
【０００６】もしくは、前記取付孔周縁の小径円弧面が
前記風洞部端縁の円弧面に連通するよう形成され、もし
くは、前記取付孔周縁の小径円弧面が前記風洞部端縁の
円弧面に対向する側のほぼ半円に形成され、該半円の取
付孔周縁の小径円弧面が前記風洞部端縁の円弧面に連通
するよう形成されている。Alternatively, the small-diameter arc surface of the periphery of the mounting hole is formed so as to communicate with the arc surface of the edge of the wind tunnel, or the small-diameter arc surface of the periphery of the mounting hole faces the arc surface of the edge of the wind tunnel portion. It is formed in a substantially semi-circular shape on the side of the wind tunnel, and the small-diameter arc surface of the periphery of the mounting hole of the semi-circle communicates with the arc surface of the edge of the wind tunnel portion.
【０００７】[0007]
【実施例】以下図面によって本発明の実施例を説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【０００８】図１は、本発明に成るベンチュリーの例
の、取付孔２−１１を示す要部断面図で、図２がその正
面要図である。図６を参照して両図に見るように、取付
孔２−１１は、円筒状風洞部２−２の端部から外方向に
伸長するように形成されているフランジ２−１に設けら
れるが、該円筒状風洞部２−２の端部は、上述従来技術
の例で説明した通り、羽根車４の転回での空気の流入に
際し、フランジ２−１の表面に沿う外方向からの流れも
加わり、取付孔２−１１が実装に使用されないで空孔と
して残っていると、当該取付孔２−１１の上を通過する
際、取付孔２−１１の部分の陥没でのフランジ表面との
段落によって気流が乱れ、吸込口側風洞部端縁に近い内
側の取付孔周縁での角の影響により笛吹き音の原因とな
るため、ここを円弧状として段差の急変を緩和すること
が笛吹き音抑制の決め手となっている。FIG. 1 is a cross-sectional view of a main part of an example of a venturi according to the present invention showing a mounting hole 2-11, and FIG. 2 is a front main view thereof. As shown in both figures with reference to FIG. 6, the mounting hole 2-11 is provided in the flange 2-1 formed to extend outward from the end of the cylindrical wind tunnel 2-2. As described in the above-described prior art, the end of the cylindrical wind tunnel portion 2-2 also has a flow from the outside along the surface of the flange 2-1 when air flows in when the impeller 4 rotates. In addition, if the mounting hole 2-11 is not used for mounting and remains as a hole, when passing over the mounting hole 2-11, a paragraph between the mounting hole 2-11 and the flange surface due to the depression of the mounting hole 2-11. The airflow is disturbed by this, and whistling noise is caused by the influence of the corner at the inner periphery of the mounting hole near the edge of the wind tunnel on the suction port side. It is a decisive factor in restraint.
【０００９】該例は、円筒状風洞部２−２の端縁円弧面
Ｒ’に連通するように、取付孔２−１１の周縁に小径円
弧面Ｒを形成したものである。該取付孔周縁の小径円弧
面Ｒの大きさは、その半径が、前記取付孔径の１／１１
を越え１／３．５以下で顕著な効果が確認されている。In this example, a small-diameter circular arc surface R is formed on the periphery of the mounting hole 2-11 so as to communicate with the end circular arc surface R 'of the cylindrical wind tunnel portion 2-2. The radius of the small-diameter arc surface R at the periphery of the mounting hole is such that its radius is 1/11 of the diameter of the mounting hole.
A remarkable effect is confirmed at 1 / 3.5 or less.
【００１０】また、図３は取付孔２−１１の周縁の小径
円弧面Ｒ２が、前記円筒状風洞部２−２に対向する側の
ほぼ半円だけに形成された第２の例で、図４にその要部
断面を示している。該例でも上述第１の例と同じ効果を
実現できる。[0010] FIG. 3 is a small-diameter arcuate surface R 2 of the peripheral edge of the mounting hole 2-11, the second embodiment which is formed by a substantially semicircular side facing the cylindrical air channel unit 2-2, FIG. 4 shows a cross section of the main part. In this example, the same effect as in the first example can be realized.
【００１１】また図１に示すように、該取付孔周縁の小
径円弧面の半径は、該円弧面のフランジ表面との連接部
から羽根車の外径までの距離とも関わりがあり、該小径
円弧面のフランジ表面連接部から羽根車の転回外周円弧
面までの距離Ｌが羽根車外径Ｄの１／１７〜１／１０で
あって、該小径円弧面のフランジ表面連接部から羽根車
の転回外周円弧面までの距離Ｌの１／１３を越え１／５
以下とすると効果のあることが確認されている。Further, as shown in FIG. 1, the radius of the small-diameter arc surface at the periphery of the mounting hole is related to the distance from the connecting portion of the arc surface to the flange surface to the outer diameter of the impeller. The distance L from the flange surface connection portion of the surface to the turning outer peripheral arc surface of the impeller is 1/17 to 1/10 of the impeller outer diameter D, and the turning outer periphery of the impeller from the flange surface connection portion of the small diameter arc surface. 1/5 over 1/13 of the distance L to the arc surface
It has been confirmed that the following is effective.
【００１２】また、上述取付孔周縁の小径円弧面Ｒは、
前記円筒状風洞端部の円弧面Ｒ’とフランジ面で連通す
るようにすることが好ましい。The small-diameter arc surface R around the mounting hole is
It is preferable to communicate with the arc surface R 'at the end of the cylindrical wind tunnel at the flange surface.
【００１３】[0013]
【発明の効果】本発明に成る軸流ファンのベンチュリー
は、空孔のまま実装される取付孔による笛吹き音を抑制
し、静穏化向上を実現できる。According to the ventilator of the axial fan according to the present invention, it is possible to suppress the whistling sound caused by the mounting hole mounted as it is, and to improve quietness.
【図１】本発明に成る例の取付孔に係る要部拡大説明図
である。FIG. 1 is an enlarged explanatory view of a main part of a mounting hole according to an example of the present invention.
【図２】図１の例の部分正面略図である。FIG. 2 is a schematic partial front view of the example of FIG. 1;
【図３】本発明に成る第２の例の取付孔部の部分正面略
図である。FIG. 3 is a schematic partial front view of a mounting hole according to a second embodiment of the present invention.
【図４】図３の例の断面略図である。FIG. 4 is a schematic sectional view of the example of FIG. 3;
【図５】従来技術に成る例の取付孔部拡大説明図であ
る。FIG. 5 is an enlarged explanatory view of a mounting hole portion of an example according to the prior art.
【図６】本発明に係る軸流ファンの例の断面図である。FIG. 6 is a sectional view of an example of an axial fan according to the present invention.
【図７】図６の例の正面図である。FIG. 7 is a front view of the example of FIG. 6;
１ 軸流ファン ２ ベンチュリケース ２−１ フランジ ２−１１ 取付孔 ２−２ 風洞部 ３ モータ ４ 羽根車 Ｄ 羽根車外周縁径 Ｒ 取付孔周縁の小径円弧 Ｒ２ 半円のみ形成される取付孔周縁の小径円弧 Ｒ’ 風洞端部の円弧DESCRIPTION OF SYMBOLS 1 Axial fan 2 Venturi case 2-1 Flange 2-11 Mounting hole 2-2 Wind tunnel part 3 Motor 4 Impeller D Impeller outer peripheral diameter R Small diameter arc of mounting hole periphery R 2 Mounting hole periphery formed only with a semicircle Small diameter arc R 'Arc at wind tunnel end
Claims (5)
にも対応できるよう、両面にフランジを備える軸流ファ
ンのベンチュリーにおいて、ベンチュリーの円筒状風洞
部吸込口側端縁が円弧面を成すと共に、吸込口側フラン
ジの取付孔周縁も、小径円弧面を成すように形成されて
いること、を特徴とする軸流ファンのベンチュリー。1. An axial flow fan venturi having flanges on both sides so that it can be mounted and arranged on both the suction port side and the discharge port side, and the cylindrical wind tunnel portion suction port side edge of the venturi has an arcuate surface. The venturi of an axial flow fan, wherein the periphery of the mounting hole of the suction side flange is also formed to form a small-diameter arc surface.
洞部端縁の円弧面に連通するよう形成されていること、
を特徴とする請求項１に記載の軸流ファンのベンチュリ
ー。2. A small-diameter arc surface at a periphery of the mounting hole is formed so as to communicate with an arc surface at an edge of the wind tunnel portion.
The venturi of an axial fan according to claim 1, wherein:
洞部端縁の円弧面に対向する側のほぼ半円に形成され、
該半円の取付孔周縁の円弧面が、前記風洞部端縁の円弧
面に連通するよう形成されていること、を特徴とする請
求項１に記載の軸流ファンのベンチュリー。3. The small-diameter arc surface of the periphery of the mounting hole is formed in a substantially semicircle on the side facing the arc surface of the edge of the wind tunnel portion,
2. The venturi of an axial fan according to claim 1, wherein an arc surface of a periphery of the mounting hole of the semicircle is formed to communicate with an arc surface of an edge of the wind tunnel portion.
前記取付孔径の１／１１を越え１／３．５以下であるこ
と、を特徴とする請求項１から３いずれかに記載の軸流
ファンのベンチュリー。4. The radius of the small-diameter arc surface of the periphery of the mounting hole is:
The venturi of an axial fan according to any one of claims 1 to 3, wherein the diameter is greater than 1/11 and not more than 1 / 3.5 of the mounting hole diameter.
該円弧面のフランジ表面連接部から羽根車の転回外周円
弧面までの距離の１／１３を越え１／５以下であるこ
と、を特徴とする請求項１から４いずれかに記載の軸流
ファンのベンチュリー。但し上記円弧面のフランジ表面
連接部から羽根車の転回外周円弧面までの距離は羽根車
外径の１／１７〜１／１０とする。5. The radius of a small-diameter arc surface of the periphery of the mounting hole is:
The axial flow fan according to any one of claims 1 to 4, wherein the distance from the flange surface connection portion of the arc surface to the turning outer circular arc surface of the impeller is more than 1/13 and 1/5 or less. Venturi. However, the distance from the flange surface connecting portion of the arc surface to the turning outer circular arc surface of the impeller is 1/17 to 1/10 of the outer diameter of the impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36427399A JP2001182698A (en) | 1999-12-22 | 1999-12-22 | Venturi of axial fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36427399A JP2001182698A (en) | 1999-12-22 | 1999-12-22 | Venturi of axial fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001182698A true JP2001182698A (en) | 2001-07-06 |
Family
ID=18481419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36427399A Pending JP2001182698A (en) | 1999-12-22 | 1999-12-22 | Venturi of axial fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001182698A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS632898U (en) * | 1986-06-23 | 1988-01-09 | ||
| JPH05141283A (en) * | 1991-11-15 | 1993-06-08 | Aisan Ind Co Ltd | Sensing structure in throttle body for internal combustion engine |
| JPH0557308U (en) * | 1992-01-10 | 1993-07-30 | 株式会社ユーメックス | Exhaust pipe structure of engine silencer |
-
1999
- 1999-12-22 JP JP36427399A patent/JP2001182698A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS632898U (en) * | 1986-06-23 | 1988-01-09 | ||
| JPH05141283A (en) * | 1991-11-15 | 1993-06-08 | Aisan Ind Co Ltd | Sensing structure in throttle body for internal combustion engine |
| JPH0557308U (en) * | 1992-01-10 | 1993-07-30 | 株式会社ユーメックス | Exhaust pipe structure of engine silencer |
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