JPS61185700A - Prevention of cone vortex in centrifugal fan - Google Patents
Prevention of cone vortex in centrifugal fanInfo
- Publication number
- JPS61185700A JPS61185700A JP2510685A JP2510685A JPS61185700A JP S61185700 A JPS61185700 A JP S61185700A JP 2510685 A JP2510685 A JP 2510685A JP 2510685 A JP2510685 A JP 2510685A JP S61185700 A JPS61185700 A JP S61185700A
- Authority
- JP
- Japan
- Prior art keywords
- vane
- small
- blade
- cone
- centrifugal fan
- 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
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
この発明は、遠心ファンにおけるコーンボルテツクス防
止方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a method for preventing cone vortex in a centrifugal fan.
従来の技術
入口ベーンによって風量制御を行なう遠心ファンの従来
例に第３および４図に示すものがある。邑すなわち、風
の通路０８内に配設させた羽根０１が入口ベーンを構成
し、該羽根の根基部に突設させであるベーン軸０３を軸
受、すなわち作動リング０５に回動可能に支承させると
ともに、前記ベーン軸には傾斜角調整レバ０６を固設さ
せ、該調整レバの操作によって前記羽根の傾斜角を変え
、すなわち開度を変えて風量の調整を行なわせるもので
ある。2. Description of the Related Art Conventional examples of centrifugal fans in which air volume is controlled by inlet vanes are shown in FIGS. 3 and 4. That is, the vane 01 disposed in the wind passage 08 constitutes an inlet vane, and the vane shaft 03, which is protruded from the root base of the vane, is rotatably supported by a bearing, that is, an operating ring 05. At the same time, an inclination angle adjustment lever 06 is fixed to the vane shaft, and by operating the adjustment lever, the inclination angle of the blades is changed, that is, the opening degree is changed to adjust the air volume.
しかるに、前述した従来遠心ファンにおいては、その人
口ベーンを構成している羽根Ｏ１が一枚羽根であるため
に、傾斜角θ（第４図）が３０〜４５度になると、コー
ンボルテツクス（渦ｉｆｆ、）が発生し、そのためにケ
ーシングの振動および騒音生起の原因になり、さらに遠
心ファンにつながるダクトにも悪影響を及ぼすなどの欠
点がある。However, in the conventional centrifugal fan described above, since the blade O1 constituting the artificial vane is a single blade, when the inclination angle θ (Fig. 4) becomes 30 to 45 degrees, cone vortex (vortex) occurs. iff, ) occurs, which causes vibration and noise in the casing, and also has disadvantages such as having an adverse effect on the duct leading to the centrifugal fan.
発明の解決しようとする問題点
この発明は、一枚羽根の入口ベーンによる風量制御にお
いて、ある傾斜角になるとコーンボルテツクスが発生し
て振動等の悪影響を与えることを防ぐことにある。Problems to be Solved by the Invention The object of the present invention is to prevent cone vortexes from occurring at a certain angle of inclination and causing adverse effects such as vibration in air volume control using a single-bladed inlet vane.
問題点を解決するための手段
この発明は、羽根を複数に分割して分割された夫々の羽
根を相対的に任意の角度に傾斜させるよ５にしたもので
ある。Means for Solving the Problems In the present invention, the blade is divided into a plurality of parts, and each of the divided blades is tilted at an arbitrary angle relative to each other.
作用
したがって、この発明の構成によれば、一部の羽根の傾
斜角によってコーンボルテツクスが発生した場合に、他
部の羽根の傾斜角を適宜選択することによって全体とし
てのコーンボルテツクス発生を防止することができる。Therefore, according to the configuration of the present invention, when cone vortex occurs due to the inclination angle of some blades, cone vortex generation as a whole can be prevented by appropriately selecting the inclination angle of other blades. can do.
実施例
つぎに、この発明の実施例について第１および２図によ
って説明をすると、いま、羽根を二枚に分割した場合を
例示して述べるが、複数枚に分割しても同様な効果があ
ることは詳述するまでもなく、風の通路８内に配設する
入口ベーンを風方向１０に直交する方向に大羽根ｌおよ
び小羽根２の二枚に構成させ、前記大羽根の根基部に突
設させである主軸３を前記小羽根を貫通して軸受５に回
動可能に支承させるとともに、前記主軸には大羽根開度
調整レバ７を固設させ、また前記小羽根の大羽根主軸３
が貫通する部位に筒状の外軸４を嵌設させろとともに、
核外軸の内側面と前記主軸とは回動自在に係合挿嵌させ
、さらに前記外軸には小羽根開度調整レバ６を固設させ
た装置であり、ついで、前述した装置によるコーンボル
テツクス防止方法について述べると、第２図に示すよう
に、大羽根ｌの傾斜角θが３０〜４０度になるとコーン
ボルテツクスが発生するために、小羽根２をその傾斜角
が９０度になるようにその開度調整レバ６を操作して調
整する。なお、図示しないが前記大羽根の傾斜角、すな
わち開度調整を自動的に調整できるようにしである。Embodiment Next, an embodiment of the present invention will be explained with reference to FIGS. 1 and 2. The case where the blade is divided into two pieces will be described as an example, but the same effect can be obtained even if the blade is divided into a plurality of pieces. Needless to say, the inlet vane disposed in the wind passage 8 is composed of two blades, a large blade 1 and a small blade 2, in a direction perpendicular to the wind direction 10. A protruding main shaft 3 passes through the small blade and is rotatably supported by a bearing 5, and a large blade opening adjustment lever 7 is fixedly attached to the main shaft, and the large blade main shaft of the small blade 3
Insert the cylindrical outer shaft 4 into the part through which the
This is a device in which the inner surface of the outer nuclear shaft and the main shaft are rotatably fitted into each other, and a small blade opening adjustment lever 6 is fixed to the outer shaft. Regarding the vortex prevention method, as shown in Fig. 2, cone vortex occurs when the inclination angle θ of the large blade 1 becomes 30 to 40 degrees, so the small blade 2 is set at an inclination angle of 90 degrees. Adjust the opening degree by operating the opening adjustment lever 6 so that the opening degree is adjusted accordingly. Although not shown, the inclination angle of the large blade, that is, the opening adjustment can be automatically adjusted.
発明の効果
上述したように、この発明は、分割した夫々の羽根を各
々任意の角度に調整させることによってＫｉ制御時のコ
ーンボルテツクスの発生を、さらに原因する振動および
騒音の生起を、ひいてはダクトの悪影響をすべて防止で
きるから、その産業上における利用価値に多大なものが
ある。Effects of the Invention As described above, the present invention eliminates the occurrence of cone vortex during Ki control by adjusting each of the divided blades to an arbitrary angle, and further reduces the occurrence of vibration and noise caused by the duct. Since it can prevent all the negative effects of the above, it has great industrial value.
第１図は、この発明の実施例を示す要部を切開してあら
れした正面図、第２図は、同じ（大羽根および小羽根の
夫々を任意角度に傾斜させた状態を示す説明図、第３図
は、従来遠心ファンの羽根の正面図、第４図は、同じ（
羽根の傾斜させた状態を示す説明図である。
１・・大羽根、２・・小羽根、３・・主軸、４・・外軸
、５・・軸受、６・・小羽根開度調整レバ、７・・大羽
根開度調整レバ、８・・風の通路、（ばか／名］
第１図
第 ３ 図FIG. 1 is a front view showing an embodiment of the present invention with main parts cut away; FIG. Figure 3 is a front view of the blades of a conventional centrifugal fan, and Figure 4 is the same (
It is an explanatory view showing a state where a blade was made to incline. 1. Large blade, 2. Small blade, 3. Main shaft, 4. Outer shaft, 5. Bearing, 6. Small blade opening adjustment lever, 7. Large blade opening adjustment lever, 8.・Wind passage, (idiot/name) Figure 1 Figure 3
Claims (1)
を夫々相対的に任意角度の開度で作動させることによつ
て、風量制御を行うことを特徴とする、遠心ファンにお
けるコーンボルテツクス防止方法。Cone vortex prevention in a centrifugal fan characterized by controlling air volume by dividing the blades of the inlet vane into a plurality of parts and operating each of the divided blades at an arbitrary relative opening angle. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2510685A JPS61185700A (en) | 1985-02-14 | 1985-02-14 | Prevention of cone vortex in centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2510685A JPS61185700A (en) | 1985-02-14 | 1985-02-14 | Prevention of cone vortex in centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61185700A true JPS61185700A (en) | 1986-08-19 |
Family
ID=12156670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2510685A Pending JPS61185700A (en) | 1985-02-14 | 1985-02-14 | Prevention of cone vortex in centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61185700A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5281087A (en) * | 1992-06-10 | 1994-01-25 | General Electric Company | Industrial gas turbine engine with dual panel variable vane assembly |
| WO2010094274A1 (en) * | 2009-02-19 | 2010-08-26 | Mtu Aero Engines Gmbh | Compressor having a guide vane assembly with a radially variable outflow |
| KR101600034B1 (en) * | 2015-04-20 | 2016-03-04 | (주)한국송풍기엔지니어링 | A vane controlling apparatus for fan |
-
1985
- 1985-02-14 JP JP2510685A patent/JPS61185700A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5281087A (en) * | 1992-06-10 | 1994-01-25 | General Electric Company | Industrial gas turbine engine with dual panel variable vane assembly |
| WO2010094274A1 (en) * | 2009-02-19 | 2010-08-26 | Mtu Aero Engines Gmbh | Compressor having a guide vane assembly with a radially variable outflow |
| KR101600034B1 (en) * | 2015-04-20 | 2016-03-04 | (주)한국송풍기엔지니어링 | A vane controlling apparatus for fan |
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