JPH04113000A - Axial flow fan - Google Patents
Axial flow fanInfo
- Publication number
- JPH04113000A JPH04113000A JP22923690A JP22923690A JPH04113000A JP H04113000 A JPH04113000 A JP H04113000A JP 22923690 A JP22923690 A JP 22923690A JP 22923690 A JP22923690 A JP 22923690A JP H04113000 A JPH04113000 A JP H04113000A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- area
- shaft portion
- burble
- inner circumference
- 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
- 238000009423 ventilation Methods 0.000 claims description 12
- 238000000926 separation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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、例えば電子機器やラジェターの冷却用ファ
ンとして供される軸流ファンに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an axial fan used as a cooling fan for, for example, electronic equipment or a radiator.
[従来の技術]
第4図は、例えば特開平2−11270号公報や実開平
2−34796号公報に示された従来の軸流ファンの精
造を示したものである。即ち、駆動軸に取付けられる軸
部lにはその周面に所定の間隔をおいて放射状態に複数
枚の羽根2が設けられている。この各羽根2にはそれぞ
れに、羽根2の前方に取入口3が開口し、羽根2の後方
に吹出口4が開口した通風Fl@ 5が直線的に内部を
貫いて形成されている。[Prior Art] FIG. 4 shows a refinement of a conventional axial fan disclosed in, for example, Japanese Patent Laid-Open No. 2-11270 and Japanese Utility Model Application No. 2-34796. That is, a plurality of blades 2 are provided on the circumferential surface of the shaft portion l attached to the drive shaft in a radial manner at predetermined intervals. Each of the blades 2 has an intake port 3 opened in front of the blade 2 and a ventilation port 4 opened in the rear of the blade 2, thereby forming a ventilation hole Fl@5 extending linearly through the inside thereof.
上記構成の軸流ファンの動作を説明する。軸流ファンが
回転した場合、一般に第5図に示すように羽根表面に沿
う空気の流れは、流体の粘性により表面近くで減速され
ることになり、羽根2の後端部では空気流の剥離が生じ
がちになる。空気流の剥離は羽根2の効率を下げ、性能
を低下させる二とになる。このとき、羽根2に設けられ
た通風路5は羽8!2の後方の吹出口4から二次空気を
吹出し、羽根2の後端部での剥離を防いでいる。従って
、通風Fl@ 5により剥離による性能の低下を抑える
二とができる。The operation of the axial fan having the above configuration will be explained. When an axial fan rotates, the airflow along the blade surface is generally decelerated near the surface due to the viscosity of the fluid, as shown in Figure 5, and the airflow is separated at the rear end of the blade 2. tends to occur. Separation of the airflow reduces the efficiency of the vanes 2, resulting in reduced performance. At this time, the ventilation passage 5 provided in the blade 2 blows out secondary air from the outlet 4 at the rear of the blade 8!2, thereby preventing the blade 2 from peeling off at the rear end. Therefore, ventilation Fl@5 can suppress the deterioration in performance due to peeling.
[発明が解決しようとする課題:
上記した従来の軸流ファンにおいては、羽根2の回転に
よる遠心力で羽根表面及び通風F!@ 5内の空気流が
調相2の後端にいくほど第6図に示すように外周方向l
X曲げられ、羽根2の後端の軸部1に近い部分は、あま
り仕事をしないことになるといった解決すべき課題を含
んでいる。[Problem to be solved by the invention: In the conventional axial flow fan described above, the centrifugal force caused by the rotation of the blades 2 causes the blade surface and the ventilation F! As the air flow in @ 5 moves toward the rear end of phase adjustment 2, it increases in the outer circumferential direction l as shown in Figure 6.
There is a problem to be solved in that the portion near the shaft portion 1 at the rear end of the blade 2, which is bent in an X direction, does not do much work.
この発明はかかる従来の課題を解消するためになされた
ものでその目的は、羽根の後端部での剥離の防止ととも
に、羽根の後端の軸部に近い部分での働きを向上させ、
羽根全体の効率の向上を計りつる軸流ファンを提供する
ことである。This invention was made in order to solve such conventional problems, and its purpose is to prevent peeling at the rear end of the blade, improve the function of the rear end of the blade near the shaft,
An object of the present invention is to provide an axial flow fan that improves the efficiency of the entire blade.
[課題を解決するための手段]
この発明に係る1lll流フアンは、軸部周面に突設さ
れた複数枚の羽根の内部に、羽根面先端から後端にかけ
て羽根外周部から内周部の方向に傾く通風路を設けたも
のである。[Means for Solving the Problems] The 1llll flow fan according to the present invention has a plurality of blades protruding from the peripheral surface of the shaft portion, and a portion extending from the outer peripheral portion to the inner peripheral portion of the blade from the tip to the rear end of the blade surface. It is equipped with a ventilation passage that tilts in the direction.
[作用コ
この発明においては、羽根外周部から内周部の方向に傾
く通風路の吹出口からの空気流により、羽根後端の軸部
近くの遠心力で外周方向へ曲げられる空気流を内周方向
に傾けることができ、剥離の起きやすい羽根の内周部後
端寄りの剥離防止とともに、羽根全体が仕事をすること
になる。[Function] In this invention, the airflow from the outlet of the ventilation passage tilting from the outer circumference of the blade toward the inner circumference causes the airflow bent toward the outer circumference by the centrifugal force near the shaft at the rear end of the blade to be It can be tilted in the circumferential direction, which prevents peeling of the rear end of the inner circumference of the blade where peeling tends to occur, and allows the entire blade to do the work.
[実施例]
第1図〜第3図はいずれも本発明の一実施例を示したも
ので、第1図は軸流ファンの平面図、第2図は軸流ファ
ンの構造を示す斜視図、第3図は同じく機能を示す説明
図である。区側の軸流ファンは、駆動軸(図示しない)
に対して取付けられる軸部1と、この軸部1の周面に所
定の間隔をおいて放射状態に突設された複数枚の羽根2
とからなる。この各羽根2にはそれぞれの内部に、羽根
面先端に取入口3が開口し、後端に吹出口4が開口する
羽根外周部から内周部の方向に傾く通風路5が貫き設け
られている。[Example] Figures 1 to 3 all show an example of the present invention, with Figure 1 being a plan view of an axial fan and Figure 2 being a perspective view showing the structure of the axial fan. , FIG. 3 is an explanatory diagram similarly showing the functions. The axial fan on the ward side has a drive shaft (not shown).
A shaft portion 1 attached to the shaft portion 1, and a plurality of blades 2 protruding radially from the circumferential surface of the shaft portion 1 at predetermined intervals.
It consists of. Each of the blades 2 is provided with a ventilation passage 5 that slopes from the outer periphery to the inner periphery of the blade, with an intake port 3 opening at the tip of the blade surface and an air outlet 4 opening at the rear end. There is.
上記構成の軸流ファンにおいては、第3図に示すように
羽根2の回転により羽根外周部から内周部の方向に傾く
通風路5の吹出口4から内周方向に空気流か吹出し、こ
の空気流により、羽根後端の軸部1近くの遠心力で外周
方向j\曲けられる空気流を内周方向に曲げ込むことか
できる。従って、剥離の起きやすい羽根2の内周部後端
寄りの剥離の防止とともに、羽根全体で仕事をさせるこ
とができるようになり、効率が良くなる。In the axial fan having the above configuration, as shown in FIG. 3, as the blades 2 rotate, an airflow is blown in the inner circumferential direction from the outlet 4 of the ventilation passage 5 which is inclined from the outer circumferential part to the inner circumferential part of the blade. Due to the airflow, the airflow that is bent in the outer circumferential direction by the centrifugal force near the shaft portion 1 at the rear end of the blade can be bent in the inner circumferential direction. Therefore, it is possible to prevent separation of the rear end of the inner circumferential portion of the blade 2, where separation is likely to occur, and to allow the entire blade to do the work, improving efficiency.
[発明の効果コ
以上、実施例による説明からも明らかなように本発明に
よれば、羽根外周部から内周部の方向に傾く通風路の吹
出口から内周方向に空気流が吹出すので、羽根後端の軸
部近くの遠心力で外周方向へ曲げられる空気流を内周方
向に曲げ込ませることができ、羽根後端の軸部近くの剥
離の防止とともに、羽根全体に仕事をさせることができ
、効率の向上を計ることができる。[Effects of the Invention] As is clear from the above description of the embodiments, according to the present invention, the airflow is blown out in the inner circumferential direction from the outlet of the ventilation passage that is inclined from the outer circumference of the blade toward the inner circumference. , airflow that is bent toward the outer circumference by centrifugal force near the shaft at the rear end of the blade can be bent toward the inner circumference, preventing separation near the shaft at the rear end of the blade and allowing the entire blade to work. It is possible to measure efficiency improvements.
第1図は本発明の一実施例としての軸流ファンの構成を
示す平面図、第2図は同じく軸流ファンの構造を示す斜
視図、第3図は同じく軸流ファンの機能を示す説明図、
第4図は従来例の軸流ファンの構造を示す斜視図、第5
図は同じくその機能を示す説明図、第6図は同じ〈従来
例の軸流ファンにおける空気の流れを示す説明図である
。図において、1は軸部、2は羽根、3は取入口、4は
吹出口、5は通風路である。
なお、図中同一符号は、同−又は相当部分を示す。
代理人 大 岩 増 雄(他2名)
第
■
図
第4
図Fig. 1 is a plan view showing the configuration of an axial fan as an embodiment of the present invention, Fig. 2 is a perspective view showing the structure of the axial fan, and Fig. 3 is an explanation showing the function of the axial fan. figure,
Figure 4 is a perspective view showing the structure of a conventional axial fan;
The same figure is an explanatory diagram showing the function, and FIG. 6 is an explanatory diagram showing the air flow in the same conventional axial fan. In the figure, 1 is a shaft, 2 is a blade, 3 is an intake port, 4 is an outlet, and 5 is a ventilation path. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Masuo Oiwa (and 2 others) Figure ■ Figure 4
Claims (1)
数枚の羽根の内部に、羽根面先端から後端にかけて羽根
外周部から内周部の方向に傾く通風路を設けたことを特
徴とする軸流ファン。A ventilation passage is provided inside a plurality of blades protruding radially from the shaft circumferential surface at predetermined intervals from the tip of the blade surface to the rear end, tilting from the outer circumference to the inner circumference of the blade. An axial fan featuring
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22923690A JPH04113000A (en) | 1990-08-30 | 1990-08-30 | Axial flow fan |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22923690A JPH04113000A (en) | 1990-08-30 | 1990-08-30 | Axial flow fan |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04113000A true JPH04113000A (en) | 1992-04-14 |
Family
ID=16888964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22923690A Pending JPH04113000A (en) | 1990-08-30 | 1990-08-30 | Axial flow fan |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04113000A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002538379A (en) * | 1999-02-25 | 2002-11-12 | ユナイテッド テクノロジーズ コーポレイション | Centrifugal air flow control device |
-
1990
- 1990-08-30 JP JP22923690A patent/JPH04113000A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002538379A (en) * | 1999-02-25 | 2002-11-12 | ユナイテッド テクノロジーズ コーポレイション | Centrifugal air flow control device |
JP4694696B2 (en) * | 1999-02-25 | 2011-06-08 | ユナイテッド テクノロジーズ コーポレイション | Centrifugal air flow control device |
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