JPH09287594A - Fan blade formed into point symmetrical blade profile - Google Patents
Fan blade formed into point symmetrical blade profileInfo
- Publication number
- JPH09287594A JPH09287594A JP9672896A JP9672896A JPH09287594A JP H09287594 A JPH09287594 A JP H09287594A JP 9672896 A JP9672896 A JP 9672896A JP 9672896 A JP9672896 A JP 9672896A JP H09287594 A JPH09287594 A JP H09287594A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- point
- gravity
- center
- coordinates
- 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.)
- Withdrawn
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明はトンネル換気用ファ
ンのような正転時と逆転時に同等の風量と推力を必要と
するファンに適用される点対称翼型から成るファン翼に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan blade of a point-symmetrical blade type, which is applied to a fan such as a tunnel ventilation fan which requires an equal amount of air and thrust at the time of forward rotation and reverse rotation.
【0002】[0002]
【従来の技術】従来の正転、逆転で同等の風量と推力を
必要とするファンは図5に示すように翼の腹側と背側の
座標が、翼の重心に対し線対称の翼型12から成り、こ
れを図6に示すように正転用と逆転用に2列使い、互い
に反対方向を向けて、それぞれ図7に示すようにケーシ
ング3にストラット4を介して取り付けられるモータ5
の前後のボス6、6に取付けられ、この2つのボス6、
6は同じ方向に回転し、一方向に気流を発生する。2. Description of the Related Art A conventional fan that requires the same air volume and thrust in forward and reverse rotation has a blade shape in which the ventral and dorsal coordinates of the blade are line-symmetric with respect to the center of gravity of the blade, as shown in FIG. The motor 5 is composed of 12 motors, which are used in two rows for forward rotation and reverse rotation as shown in FIG. 6, and are oriented in mutually opposite directions, and are respectively attached to the casing 3 through the struts 4 as shown in FIG.
Attached to the front and rear bosses 6, 6, these two bosses 6,
6 rotates in the same direction and generates an air flow in one direction.
【0003】[0003]
【発明が解決しようとする課題】しかし図7に示すよう
にモータの前後のボスに正転、逆転両用の翼型を2列に
渉って設けるものでは正転時には、2列目の逆転用翼列
が若干の風量、推力を発揮するものの、流れに対し適正
に配置されていないため翼列下流の流れを乱し、騒音が
大きくなる。また翼列が2列があることは1列に比べて
コストが大きくなる等の問題点を有している。However, as shown in FIG. 7, in the case where the bosses for the forward and backward rotation of the motor are provided in two rows for both normal rotation and reverse rotation, in the case of forward rotation, the reverse rotation for the second row is performed. Although the blade row exerts a small amount of airflow and thrust, it is disturbed in the flow downstream of the blade row because it is not properly arranged with respect to the flow, and noise increases. Further, the fact that there are two rows of blades has a problem that the cost becomes higher than that of one row.
【0004】本発明はかかる問題点に対処するため開発
されたものであって正転と逆転とを同じ翼型で可能とす
ることを目的とする。The present invention was developed to address such a problem, and an object of the present invention is to enable normal rotation and reverse rotation with the same airfoil shape.
【0005】[0005]
【課題を解決するための手段】上記の目的を達成するた
めの本発明の構成は翼の腹側と背側の座標が、翼の重心
に対し点対称な位置にあることを特徴とする。The structure of the present invention for achieving the above object is characterized in that the coordinates of the ventral side and the dorsal side of the blade are at positions symmetrical with respect to the center of gravity of the blade.
【0006】[0006]
【発明の実施の形態】図1は本発明のファン翼の一実施
例を示す断面図で、該ファン翼1はその翼型を翼の腹側
1aと背側1bの座標が、翼の重心2に対し点対称な位
置にある点対称翼型とし、図1(a)では重心2付近で
少しくびれをもつ点対称翼型を示し、図1(b)では翼
厚がほとんど変化しない点対称翼型を示す。1 is a cross-sectional view showing an embodiment of a fan blade of the present invention. The fan blade 1 has a blade shape whose coordinates on the ventral side 1a and the back side 1b of the blade are the center of gravity of the blade. 2 is a point-symmetric airfoil in a point-symmetrical position with respect to 2, and FIG. 1 (a) shows a point-symmetric airfoil with a slight constriction near the center of gravity 2. In FIG. 1 (b), the blade thickness is almost unchanged. The wing shape is shown.
【0007】図2は前記ファン翼1の取付状態を示す概
略図で、ファン翼1はケーシング3にストラット4を介
して取付けられるモータ5びボス6に取付けられ、その
取付けは図3に示すようにボス6に適宜の間隔を設けて
一列に取付けられており、モータ5の回転方向に従って
正逆回転する。そして正転時の気流方向は図4(a)に
示すようにモータ5の正転回転方向7に対し直交する正
転気流8と、図4(b)に示すようにモータ5の逆転回
転方向9に対し直交する逆転気流10となり、その翼型
に対する速度三角形は図4に示すように正転時と逆転時
において翼の取付角θは変化せず、回転数も同じである
ため気流の翼に対する角度β1 は変化しない。このため
風量、推力は正転時と逆転時で同等となる。図中11は
モータ下流の流れを整流するテールコーンを示す。FIG. 2 is a schematic view showing a mounting state of the fan blade 1. The fan blade 1 is mounted on a motor 5 and a boss 6 which are mounted on a casing 3 through struts 4, and the mounting is as shown in FIG. The bosses 6 are attached to the bosses 6 in a line at appropriate intervals and rotate in the forward and reverse directions according to the rotation direction of the motor 5. As shown in FIG. 4 (a), the air flow direction during normal rotation is a normal rotation air flow 8 orthogonal to the normal rotation direction 7 of the motor 5 and the reverse rotation direction of the motor 5 as shown in FIG. 4 (b). As shown in FIG. 4, the airflow blade 10 has a reverse airflow 10 that is orthogonal to 9 and its velocity triangle does not change during normal rotation and reverse rotation, and the rotation speed is the same. The angle β 1 with respect to does not change. Therefore, the air volume and thrust are the same in forward rotation and reverse rotation. Reference numeral 11 in the figure denotes a tail cone that rectifies the flow downstream of the motor.
【0008】[0008]
【発明の効果】このように本発明によるときはファン翼
を、翼の腹側と背側の座標が、翼の重心に対し、点対称
な位置にある点対称翼型としたものであるから正転時と
逆転時で翼に対する気流の流入条件が同じであるため、
正転逆転時で同等の風量と推力を得ることができ、又翼
列を1列とすることが可能となるためコストの低減にな
ると共に動翼下流で流れを乱すものが少なくなるため低
騒音となる等の効果を有する。As described above, according to the present invention, the fan blade is a point-symmetrical blade type in which the ventral and dorsal coordinates of the blade are point-symmetrical with respect to the center of gravity of the blade. Since the airflow inflow condition to the blade is the same during forward rotation and reverse rotation,
It is possible to obtain the same air volume and thrust at the time of normal rotation and reverse rotation, and it is possible to reduce the cost because the blade row can be one row, and the noise that disturbs the flow is reduced downstream of the blade. And so on.
【図1】本発明の翼型の一実施例を示す断面図である。FIG. 1 is a cross-sectional view showing an embodiment of an airfoil of the present invention.
【図2】本発明の翼型の取付け状況を示す概略図であ
る。FIG. 2 is a schematic view showing a mounting state of the airfoil of the present invention.
【図3】図2の翼列の斜視図である。3 is a perspective view of the blade row of FIG. 2. FIG.
【図4】翼型に対する正転、逆転時の速度三角形図であ
る。FIG. 4 is a velocity triangle diagram for forward and reverse rotations with respect to an airfoil.
【図5】従来の翼型を示す断面図である。FIG. 5 is a cross-sectional view showing a conventional airfoil.
【図6】従来の翼型の翼列図である。FIG. 6 is a blade array diagram of a conventional airfoil.
【図7】従来の翼型の取付け状況を示す概略図である。FIG. 7 is a schematic view showing a mounting state of a conventional airfoil.
1 ファン翼 1a 腹側 1b 背側 2 重心 1 fan blade 1a ventral side 1b dorsal side 2 center of gravity
Claims (1)
し点対称な位置にあることを特徴とする点対称翼型から
成るファン翼。1. A fan blade having a point-symmetrical blade shape, wherein the ventral and dorsal coordinates of the blade are located symmetrically with respect to the center of gravity of the blade.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9672896A JPH09287594A (en) | 1996-04-18 | 1996-04-18 | Fan blade formed into point symmetrical blade profile |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9672896A JPH09287594A (en) | 1996-04-18 | 1996-04-18 | Fan blade formed into point symmetrical blade profile |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09287594A true JPH09287594A (en) | 1997-11-04 |
Family
ID=14172801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9672896A Withdrawn JPH09287594A (en) | 1996-04-18 | 1996-04-18 | Fan blade formed into point symmetrical blade profile |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH09287594A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100843988B1 (en) * | 2000-11-13 | 2008-07-07 | 보그-워너 인코포레이티드 | Molded cooling fan |
JP2009097430A (en) * | 2007-10-17 | 2009-05-07 | Panasonic Corp | Axial blower |
CN103587684A (en) * | 2013-10-24 | 2014-02-19 | 中国科学院长春光学精密机械与物理研究所 | Two-dimensional airfoil profile with low-Reynolds number and rotor wing with two-dimensional airfoil profile |
CN110043510A (en) * | 2018-05-18 | 2019-07-23 | 广东美的制冷设备有限公司 | The blade of wind wheel |
CN116608131A (en) * | 2023-05-15 | 2023-08-18 | 包耀红 | Marine bidirectional transverse inclination adjusting pump |
-
1996
- 1996-04-18 JP JP9672896A patent/JPH09287594A/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100843988B1 (en) * | 2000-11-13 | 2008-07-07 | 보그-워너 인코포레이티드 | Molded cooling fan |
JP2009097430A (en) * | 2007-10-17 | 2009-05-07 | Panasonic Corp | Axial blower |
CN103587684A (en) * | 2013-10-24 | 2014-02-19 | 中国科学院长春光学精密机械与物理研究所 | Two-dimensional airfoil profile with low-Reynolds number and rotor wing with two-dimensional airfoil profile |
CN110043510A (en) * | 2018-05-18 | 2019-07-23 | 广东美的制冷设备有限公司 | The blade of wind wheel |
CN110043510B (en) * | 2018-05-18 | 2024-03-05 | 广东美的制冷设备有限公司 | Blade of wind wheel |
CN116608131A (en) * | 2023-05-15 | 2023-08-18 | 包耀红 | Marine bidirectional transverse inclination adjusting pump |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030701 |