JPS624718Y2 - - Google Patents
Info
- Publication number
- JPS624718Y2 JPS624718Y2 JP1981089918U JP8991881U JPS624718Y2 JP S624718 Y2 JPS624718 Y2 JP S624718Y2 JP 1981089918 U JP1981089918 U JP 1981089918U JP 8991881 U JP8991881 U JP 8991881U JP S624718 Y2 JPS624718 Y2 JP S624718Y2
- Authority
- JP
- Japan
- Prior art keywords
- wave
- blade
- fan
- cooling fan
- outer 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.)
- Expired
Links
- 239000011324 bead Substances 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 12
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【考案の詳細な説明】
本考案は自動車等の内燃機関の冷却フアンに関
する。[Detailed Description of the Invention] The present invention relates to a cooling fan for internal combustion engines such as automobiles.
内燃機関の冷却フアンは、一般的には第１図に
示すように取付けられている。 A cooling fan for an internal combustion engine is generally installed as shown in FIG.
機関本体１の冷却水を放熱するラジエータ２の
背面に位置して、冷却フアン３が配設される。 A cooling fan 3 is disposed on the back side of a radiator 2 that radiates heat from the cooling water of the engine body 1.
冷却フアン３は機関回転により駆動され、走行
風とともに外気を取入れラジエータ２の放熱を促
進する。 The cooling fan 3 is driven by the rotation of the engine, takes in outside air together with the running wind, and promotes heat dissipation from the radiator 2.
フアン効率を高めるために、冷却フアン３の外
側をシユラウド４により覆い、翼先端における空
気流の回り込みを防ぐようにしている。 In order to increase fan efficiency, the outside of the cooling fan 3 is covered with a shroud 4 to prevent airflow from going around the blade tips.
ところで、最近の課題として自動車騒音の低減
があげられているが、冷却フアンによりひき起さ
れる騒音も無視できないものがあり、そこで、騒
音対策と同時にフアン効率の向上をねらつて、第
２図に示すような冷却フアンが本出願人により提
案されている。 By the way, the reduction of automobile noise has been raised as a recent issue, but the noise caused by cooling fans cannot be ignored.Therefore, we have developed a system as shown in Figure 2, aiming to improve fan efficiency as well as noise countermeasures. A cooling fan as shown has been proposed by the applicant.
これは冷却フアンのブレード５の翼表面５Ａ及
び裏面５Ｂに、回転半径方向に等間隔で配列し
た、円周方向に延びる凹凸、つまり波型ビード６
を形成したもので、この波型ビード６により翼面
に沿つての軸流方向への空気流を整流し、翼面か
ら離れた直後の渦発生をできる限り抑制して騒音
の低減とフアン効率の向上をはかり、さらにこの
波型ビード６は半径方向（ラジアル方向）へ遠心
力で飛ばされる空気流を、その円周方向の溝によ
り減少させて、翼先端から吸込側、つまり表面５
Ａ側へと回り込む流量を減らしてフアン効率を高
めているのである。 These are unevenness extending in the circumferential direction, that is, wave-shaped beads 6 arranged at equal intervals in the direction of the rotation radius on the blade surface 5A and back surface 5B of the blades 5 of the cooling fan.
The corrugated bead 6 rectifies the airflow in the axial direction along the blade surface, suppressing the generation of vortices immediately after leaving the blade surface as much as possible, reducing noise and fan efficiency. In addition, the wave-shaped bead 6 reduces the air flow blown in the radial direction by centrifugal force with its circumferential grooves, and moves it from the blade tip to the suction side, that is, the surface 5.
This reduces the amount of flow that goes around to the A side, increasing fan efficiency.
したがつてこの波型の冷却フアンによれば、送
風騒音の低減とフアン効率の向上が同時にはかれ
るというメリツトがあるのだが、低回転域で大風
量を要求される場合には、必らずしも十分とは言
えない。 Therefore, this wave-shaped cooling fan has the advantage of reducing blowing noise and improving fan efficiency at the same time, but it is not necessary when a large air volume is required in a low rotation range. I can't say it's enough.
そこで本考案は、波型ビードの高さを外周側に
いくほど高くすることにより、なお一層フアン効
率を高めて風量増大をはかつた内燃機関の冷却フ
アンを提供することを目的とする。 Therefore, an object of the present invention is to provide a cooling fan for an internal combustion engine that further increases the fan efficiency and increases the air volume by increasing the height of the wave-shaped beads toward the outer circumference.
すなわち、本考案はフアンブレードの翼面に回
転円周方向に延び、かつ半径方向に等間隔に同心
円状に配列された波型ビードを設け、この波型ビ
ードの波高を、ブレードの内周側に比べて外周側
が高くなるように形成してある。 That is, the present invention provides wave-shaped beads extending in the rotating circumferential direction on the blade surface of the fan blade and arranged concentrically at equal intervals in the radial direction, and the wave height of the wave-shaped beads is adjusted to the inner circumferential side of the blade. It is formed so that the outer circumferential side is higher than that.
以下、本考案の実施例を図面にもとずいて説明
する。 Embodiments of the present invention will be described below with reference to the drawings.
第３図に示す第１実施例において、フアンブレ
ード５に形成した波型ビード６は、内周側の波高
H1に比べて外周側の波高H2が高く、かつ内周側
から外周側にかけて直線的に波高を増加させてあ
る。 In the first embodiment shown in FIG. 3, the wave-shaped bead 6 formed on the fan blade 5 has a wave height on the inner peripheral side.
The wave height H2 on the outer circumferential side is higher than H1 , and the wave height increases linearly from the inner circumferential side to the outer circumferential side.
ブレード５は外周側、つまり先端へいくほど周
速度が速まり、このため風量に及ぼす影響は内周
側よりも外周側の方がはるかに大きい。 The circumferential speed of the blade 5 increases as it goes toward the outer circumference, that is, toward the tip, and therefore the effect on the air volume is much greater on the outer circumference than on the inner circumference.
したがつて、外周側ほど流速も速くなり、しか
も遠心方向へ逃げる流量割合も増加するが、この
ように外周側ほど波型ビード６の波高を高くして
あるため、整流作用が強まりかつ遠心方向への流
れの阻止作用も増し、効果的に風量の増大がはか
れるのである。 Therefore, the flow velocity becomes faster toward the outer circumference, and the proportion of flow that escapes in the centrifugal direction also increases.However, since the wave height of the corrugated bead 6 is made higher toward the outer circumference, the rectification effect becomes stronger and the flow rate in the centrifugal direction increases. This increases the effect of blocking the flow to the air, effectively increasing the air volume.
また、このことは同一の風量を得るのに、フア
ン効率の低い内周部の波高は低くできることを意
味し、したがつてこの場合には余分な肉厚を削除
して軽量化が可能となる。 Additionally, this means that the wave height can be lowered in the inner circumferential area where the fan efficiency is lower, even though the same air volume is obtained.Therefore, in this case, it is possible to reduce the weight by removing excess wall thickness. .
ところで波型ビード６の高さの変化は、必らず
しも直線的に増加させるのに限らず、第４図のよ
うに曲線的に変化させた波型ビード６Ａや、第５
図のように途中から段階的に変化させた波型ビー
ド６Ｂ、あるいは第６図のように、片面のみを連
続的に波高を変化させた波型ビード６Ｃとするこ
ともできる。 By the way, the change in the height of the corrugated bead 6 is not necessarily limited to increasing linearly, but can also be achieved by changing the height of the corrugated bead 6A in a curved manner as shown in FIG.
It is also possible to use a wavy bead 6B in which the wave height is changed stepwise from the middle as shown in the figure, or a wavy bead 6C in which the wave height is continuously changed on only one side as shown in FIG.
また、第７図はブレード５を板金製とし、波型
ビード６Ｄをプレス加工により、外周側にいくほ
ど波高を高くしたものである。 In addition, in FIG. 7, the blade 5 is made of sheet metal, and the corrugated bead 6D is pressed so that the wave height increases toward the outer circumference.
以上のように本考案は、周速度の速い外周側に
いくほど波型ビードの波高を高くしたので、整流
効果をなお一層高められてフアン効率が向上し風
量の増大がはかれる。 As described above, in the present invention, the wave height of the corrugated bead is made higher toward the outer circumference where the circumferential speed is higher, so that the rectification effect is further enhanced, the fan efficiency is improved, and the air volume is increased.
第１図は冷却フアンの取付状態を示す側断面
図、第２図Ａは従来のフアンブレードの正面図、
第２図Ｂはその断面図である。第３図ないし第７
図は本考案のそれぞれ実施例を示すフアンブレー
ドの断面図である。
５……フアンブレード、６，６Ａ，６Ｂ，６Ｃ
……波型ビード。
Figure 1 is a side sectional view showing the installed state of the cooling fan, Figure 2A is a front view of a conventional fan blade,
FIG. 2B is a sectional view thereof. Figures 3 to 7
The figures are cross-sectional views of fan blades showing respective embodiments of the present invention. 5...Fan blade, 6, 6A, 6B, 6C
...Wave-shaped bead.
Claims (1)
かつ半径方向に等間隔に同心円状に配列された波
型ビードを設け、この波型ビードの波高を、ブレ
ードの内周側に比べて外周側が高くなるように形
成したことを特徴とする内燃機関の冷却フアン。 Extending in the rotational circumferential direction on the wing surface of the fan blade,
An internal combustion engine characterized in that the wave-shaped beads are arranged concentrically at equal intervals in the radial direction, and the wave height of the wave-shaped beads is formed to be higher on the outer circumference side than on the inner circumference side of the blade. cooling fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981089918U JPS624718Y2 (en) | 1981-06-18 | 1981-06-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981089918U JPS624718Y2 (en) | 1981-06-18 | 1981-06-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57202800U JPS57202800U (en) | 1982-12-23 |
| JPS624718Y2 true JPS624718Y2 (en) | 1987-02-03 |
Family
ID=29885052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981089918U Expired JPS624718Y2 (en) | 1981-06-18 | 1981-06-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS624718Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5147784B2 (en) * | 2009-06-01 | 2013-02-20 | 三菱電機株式会社 | Fan and axial blower |
| JP2012241684A (en) * | 2011-05-24 | 2012-12-10 | Mitsubishi Electric Corp | Axial fan |
| JP5611379B2 (en) * | 2013-01-23 | 2014-10-22 | 株式会社豊田自動織機 | Impeller for turbocharger, method for manufacturing impeller for turbocharger, turbocharger, and turbo unit |
| JP2016166558A (en) * | 2015-03-09 | 2016-09-15 | 株式会社デンソー | Air blower |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5637119Y2 (en) * | 1976-02-27 | 1981-08-31 |
-
1981
- 1981-06-18 JP JP1981089918U patent/JPS624718Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57202800U (en) | 1982-12-23 |
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