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JPH0759958B2 - Axial blower blades - Google Patents

Axial blower blades

Info

Publication number
JPH0759958B2
JPH0759958B2 JP1276407A JP27640789A JPH0759958B2 JP H0759958 B2 JPH0759958 B2 JP H0759958B2 JP 1276407 A JP1276407 A JP 1276407A JP 27640789 A JP27640789 A JP 27640789A JP H0759958 B2 JPH0759958 B2 JP H0759958B2
Authority
JP
Japan
Prior art keywords
blade
boss portion
axial blower
axial
blades
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 - Lifetime
Application number
JP1276407A
Other languages
Japanese (ja)
Other versions
JPH03139155A (en
Inventor
竜三 久良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1276407A priority Critical patent/JPH0759958B2/en
Publication of JPH03139155A publication Critical patent/JPH03139155A/en
Publication of JPH0759958B2 publication Critical patent/JPH0759958B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、ボス部の外周に複数枚の翼部を放射状に突設
してなる軸流送風機の羽根に関し、特に、ボス部の外周
面の形状に関するものである。
Description: TECHNICAL FIELD The present invention relates to a blade of an axial-flow blower in which a plurality of blades are radially provided on the outer periphery of a boss portion, and particularly to the outer peripheral surface of the boss portion. Is related to the shape of.

[従来の技術] 従来のこの種の軸流送風機の羽根として、実開昭62−68
477号公報に掲載の技術を挙げることができる。
[Prior Art] As a blade of a conventional axial blower of this type, the actual blade is 62-68.
The technology disclosed in Japanese Patent No. 477 can be mentioned.

第7図は前掲公報に開示された従来の軸流送風機の羽根
を示す正面図、第8図は第7図のO−A線の要部断面
図、第9図は第7図のO−B線の要部断面図である。
FIG. 7 is a front view showing the blades of the conventional axial flow fan disclosed in the above-mentioned publication, FIG. 8 is a sectional view of a main part taken along the line OA of FIG. 7, and FIG. 9 is an O- of FIG. It is an important section sectional view of a B line.

図において、(31)は軸流送風機のケーシング、(32)
は前記ケーシング(31)の内部に収容された羽根であ
る。前記羽根(32)は軸流送風機の回転軸(図示略)に
結合された円筒状のボス部(33)と、前記ボス部(33)
の外周面に放射状に突設された複数枚の翼部(34)とか
ら合成樹脂により一体成形されている。そして、ボス部
(33)は、第8図及び第9図に示すように、吸気側(上
側)の外径と吐出側(下側)の外径とが等しい正規の円
筒面を有している。
In the figure, (31) is the casing of the axial blower, and (32)
Is a blade housed inside the casing (31). The blade (32) has a cylindrical boss portion (33) connected to a rotary shaft (not shown) of an axial blower, and the boss portion (33).
Is integrally molded with a synthetic resin from a plurality of blade portions (34) radially provided on the outer peripheral surface of the. And, as shown in FIGS. 8 and 9, the boss portion (33) has a regular cylindrical surface whose outer diameter on the intake side (upper side) and outer diameter on the discharge side (lower side) are equal. There is.

上記のように構成された従来の軸流送風機の羽根におい
ては、羽根(32)の第7図の矢印方向への回転に伴い、
その翼部(34)により第8図の矢印方向の空気流が形成
される。したがって、この空気流によりOA機器等の各種
電気機器の発熱部を冷却することができる。
In the blade of the conventional axial blower configured as described above, as the blade (32) rotates in the direction of the arrow in FIG. 7,
An airflow in the direction of the arrow in FIG. 8 is formed by the blade portion (34). Therefore, this airflow can cool the heat generating portions of various electric devices such as OA devices.

[発明が解決しようとする課題] ところで、羽根(32)の送風量は、各翼部(34)の吸気
側面積(正面側から見た面積)の大きさによって決定さ
れる。しかしながら、従来の軸流送風機の羽根(32)
は、上記したように、ボス部(33)の外周面が正規の円
筒面となっているため、ボス部(33)の外径、及び、ケ
ーシング(31)の内径が限られた設計条件下では、翼部
(34)の吸気側面積をこれ以上拡大することができず、
自ずと、羽根(32)の送風量も限定されていた。
[Problems to be Solved by the Invention] By the way, the amount of air blown by the blades (32) is determined by the size of the intake side area (the area viewed from the front side) of each blade section (34). However, conventional axial blower blades (32)
As described above, since the outer peripheral surface of the boss (33) is a regular cylindrical surface, the outer diameter of the boss (33) and the inner diameter of the casing (31) are limited under design conditions. Then, the intake side area of the wings (34) could not be expanded any further,
Naturally, the air flow rate of the blades (32) was also limited.

そして、本発明は上記の事情に鑑みてなされたものであ
り、その課題は、限られた設計条件下で翼部の吸気側面
積を拡大して、送風量を増大できるとともに、吸込空気
をスムーズに流動案内して、騒音を低下できる軸流送風
機の羽根を提供することにある。
Then, the present invention has been made in view of the above circumstances, and its problem is that the intake side area of the blade portion is expanded under a limited design condition to increase the blown air volume and the intake air is smooth. The purpose of the present invention is to provide blades of an axial blower that can reduce the noise by performing flow guidance.

[課題を解決するための手段] 上記の課題を解決するために、本発明の軸流送風機の羽
根は、回転軸に結合される略円筒状のボス部と、そのボ
ス部の外周に放射状に突設された複数枚の翼部とを具備
し、各翼部の間におけるボス部の外周面に、吸気側及び
回転方向側の中心軸側に向かって深くなる凹部を形成し
てなるものである。
[Means for Solving the Problems] In order to solve the above problems, the blade of the axial blower of the present invention has a substantially cylindrical boss portion coupled to a rotation shaft and a radial shape on the outer periphery of the boss portion. A plurality of blades that are provided in a protruding manner, and a concave portion that becomes deeper toward the central axis side on the intake side and the rotation direction side is formed on the outer peripheral surface of the boss portion between each blade portion. is there.

[作用] 本発明の軸流送風機の羽根においては、ボス部の外周面
に設けた凹部が、吸気側及び回転方向側に向かって深く
形成されているので、各翼部の吸気側面積が拡大され
る。したがって、限られた設計条件下で、羽根の送風量
を増大することができる。また、凹部は吸気側ほど深く
形成されているため、吸込空気がボス部の外周面に沿っ
て吐出側へスムーズに流動案内される。その結果、軸流
送風機の騒音を低下できる。
[Operation] In the blade of the axial blower of the present invention, since the concave portion provided on the outer peripheral surface of the boss portion is formed deep toward the intake side and the rotation direction side, the intake side area of each blade portion is enlarged. To be done. Therefore, the amount of air blown by the blades can be increased under limited design conditions. Further, since the concave portion is formed deeper toward the intake side, the suction air is smoothly flow-guided to the discharge side along the outer peripheral surface of the boss portion. As a result, the noise of the axial blower can be reduced.

[実施例] 以下、本発明を具体化した実施例を図面に基づいて説明
する。
[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

第1図は本発明の一実施例を示す軸流送風機の正面図、
第2図は第1図のC−O−D線の拡大断面図、第3図は
第1図のO−A線の要部拡大断面図、第4図は第1図の
O−B線の要部拡大断面図、第5図は羽根の部分斜視
図、第6図は本発明の一実施例の羽根の特性を従来例と
比較して示す特性図である。
FIG. 1 is a front view of an axial blower showing an embodiment of the present invention,
2 is an enlarged sectional view taken along the line C--O--D in FIG. 1, FIG. 3 is an enlarged sectional view taken along the line O--A in FIG. 1, and FIG. 4 is taken along the line O--B in FIG. FIG. 5 is a partial perspective view of a blade of FIG. 5, and FIG. 6 is a characteristic diagram showing characteristics of the blade of one embodiment of the present invention in comparison with a conventional example.

第1図及び第2図において、(1)は合成樹脂製のケー
シング、(2)は前記ケーシング(1)の中央部に突設
された支持筒部、(3)は、前記支持筒部(2)の外側
に固定されたプリント基板、(4)は支持筒部(2)の
内側に挿入固定された軸受スリーブ、(15)は前記軸受
スリーブ(4)の外側に固定されたステータである。前
記ステータ(15)はステータコア(13)と、それに巻装
されたコイル(14)とから構成されている。(5)は前
記軸受スリーブ(4)内に圧入された含油焼結軸受、
(6)は前記含油焼結軸受(5)に回転可能に支持され
た回転軸である。
In FIGS. 1 and 2, (1) is a casing made of synthetic resin, (2) is a supporting cylinder portion projecting from the central portion of the casing (1), and (3) is the supporting cylinder portion ( A printed circuit board fixed to the outside of 2), a bearing sleeve inserted into and fixed to the inside of the support cylindrical portion (2), and a stator fixed to the outside of the bearing sleeve. . The stator (15) is composed of a stator core (13) and a coil (14) wound around it. (5) is an oil-impregnated sintered bearing press-fitted into the bearing sleeve (4),
(6) is a rotating shaft rotatably supported by the oil-impregnated sintered bearing (5).

(7)は軸流送風機の羽根の全体を示す。前記羽根
(7)は、回転軸(6)の先端に結合された円筒カップ
状のボス部(9)と、前記ボス部(9)の外周面に放射
状に突設された複数枚の翼部(8)とから合成樹脂によ
り一体成形されている。(10)は前記羽根(7)のボス
部(9)の内周面に固着されたロータであり、外側のロ
ータヨーク(11)と、内側のロータマグネット(12)と
から構成されている。なお、(19)は回転軸(6)の変
動を除去する予圧ばねである。
(7) shows the entire blade of the axial blower. The blade (7) has a cylindrical cup-shaped boss portion (9) connected to the tip of the rotating shaft (6), and a plurality of blade portions radially provided on the outer peripheral surface of the boss portion (9). (8) and synthetic resin are integrally molded. (10) is a rotor fixed to the inner peripheral surface of the boss portion (9) of the blade (7), and is composed of an outer rotor yoke (11) and an inner rotor magnet (12). Reference numeral (19) is a preload spring that eliminates the fluctuation of the rotary shaft (6).

前記羽根(7)の構成について詳述すると、第1図及び
第5図に示すように、前記各翼部(8)の間における前
記ボス部(9)の外周面にはそれぞれ凹部(17)が設け
られている。前記各凹部(17)は、第1図に示すよう
に、回転方向側(同図の矢印方向)に向かって徐々に深
くなるように形成されている。また、各凹部(17)は、
第3図に示すように、吸気側(同図の上側)に向かって
徐々に深くなるように形成されている。なお、第4図に
示すように、吐出側の翼部(8)に対応するボス部
(9)の外周面は正規の円筒面に近い形状になってい
る。すなわち、各凹部(17)は回転方向側及び吸気側ほ
ど徐々に深くなる滑らかな曲面を有している。
The configuration of the blade (7) will be described in detail. As shown in FIGS. 1 and 5, a recess (17) is formed on the outer peripheral surface of the boss (9) between the blades (8). Is provided. As shown in FIG. 1, each of the recesses (17) is formed so as to gradually become deeper toward the rotation direction side (the arrow direction in the drawing). Also, each recess (17)
As shown in FIG. 3, it is formed so as to become gradually deeper toward the intake side (upper side in the same figure). As shown in FIG. 4, the outer peripheral surface of the boss portion (9) corresponding to the discharge side blade portion (8) has a shape close to a regular cylindrical surface. That is, each recess (17) has a smooth curved surface that gradually becomes deeper toward the rotation direction side and the intake side.

上記のように構成された軸流送風機においては、ステー
タコア(13)とロータマグネット(12)との間の磁気吸
引及び反発力により、ロータ(10)がステータ(15)の
外側で回転される。ロータ(10)の回転に伴い、それに
結合された羽根(7)及び回転軸(6)が一体に回転さ
れ、羽根(7)の翼部(8)により、第3図に矢印で示
す軸方向の空気流が形成される。したがって、この空気
流により、従来と同様、OA機器等の各種電気機器の発熱
部を冷却することができる。
In the axial blower configured as described above, the rotor (10) is rotated outside the stator (15) by the magnetic attraction and repulsive force between the stator core (13) and the rotor magnet (12). Along with the rotation of the rotor (10), the blade (7) and the rotary shaft (6) coupled to the rotor (10) are integrally rotated, and the blade portion (8) of the blade (7) causes an axial direction indicated by an arrow in FIG. An air flow of is formed. Therefore, this air flow can cool the heat generating portions of various electric devices such as OA devices as in the conventional case.

ところが、本実施例の軸流送風機の羽根(7)は、その
ボス部(9)の吸気側の外周面に凹部(17)が形成され
ているので、第1図から明らかなように、各翼部(8)
の基端が内側に拡張されて、その分、各翼部(8)の吸
気側面積が拡大される。
However, the blade (7) of the axial blower of the present embodiment has the concave portion (17) formed on the outer peripheral surface of the boss portion (9) on the intake side. Therefore, as is clear from FIG. Wing (8)
The base end of is expanded inward, and the intake side area of each blade (8) is expanded accordingly.

この吸気側面積の拡大による効果を第6図の特性図に基
づいて確認する。第6図の下部には風量−静圧(負荷
圧)特性が示され、また、第6図の上部には風量−騒音
特性が示されている。なお、実線は本発明の一実施例を
特性を、破線は従来例の特性を示す。
The effect of the expansion of the intake side area will be confirmed based on the characteristic diagram of FIG. The air volume-static pressure (load pressure) characteristic is shown in the lower part of FIG. 6, and the air volume-noise characteristic is shown in the upper part of FIG. The solid line shows the characteristic of one embodiment of the present invention, and the broken line shows the characteristic of the conventional example.

風量−静圧(負荷圧)特性の点では、本発明の実施例の
場合、特に、高圧負荷領域における風量が従来例よりも
増加する。また、風量−騒音特性の点では、少風量領域
における騒音が従来例よりも低下する。
In terms of the air volume-static pressure (load pressure) characteristic, in the case of the embodiment of the present invention, the air volume in the high pressure load region is increased more than in the conventional example. Further, in terms of air volume-noise characteristics, noise in the low air volume region is lower than that of the conventional example.

このように、本実施例の軸流送風機の羽根(7)は、回
転軸(6)に結合される円筒カップ状のボス部(9)
と、そのボス部(9)の外周面に放射状に突設された複
数枚の翼部(8)とから合成樹脂により一体成形され、
各翼部(8)の間におけるボス部(9)の外周面に、吸
気側及び回転方向側に向かって深くなる凹部(17)を形
成してなるものである。
Thus, the blade (7) of the axial blower of the present embodiment has a cylindrical cup-shaped boss portion (9) coupled to the rotating shaft (6).
And a plurality of blade portions (8) radially provided on the outer peripheral surface of the boss portion (9) and integrally molded of synthetic resin,
A recess (17) is formed on the outer peripheral surface of the boss (9) between the blades (8) so as to become deeper toward the intake side and the rotational direction side.

したがって、本実施例の軸流送風機の羽根(7)によれ
ば、ボス部(9)の外周面に設けた凹部(17)により、
各翼部(8)の吸気側面積が拡大される。このため、ボ
ス部(9)の外径及びケーシング(1)の内径が限られ
た設計条件下であっても、羽根(7)の送風量を増大す
ることができる。また、凹部(17)は吸気側ほど深く形
成されているため、吸込空気がボス部(9)の外周面に
沿って吐出側へスムーズに流動案内される。その結果、
軸流送風機の騒音を低下することができる。
Therefore, according to the blade (7) of the axial blower of the present embodiment, the concave portion (17) provided on the outer peripheral surface of the boss portion (9)
The intake side area of each wing (8) is enlarged. Therefore, the amount of air blown by the blades (7) can be increased even under design conditions in which the outer diameter of the boss portion (9) and the inner diameter of the casing (1) are limited. Further, since the recess (17) is formed deeper toward the intake side, the suction air is smoothly guided to the discharge side along the outer peripheral surface of the boss (9). as a result,
The noise of the axial blower can be reduced.

なお、上記実施例では、本発明がモータ内蔵型の軸流送
風機に具体化されているが、本発明はこれに限定される
ものではなく、モータが外部に設置された軸流送風機に
適用して実施することも可能である。しかしながら、上
記実施例のようなモータ内蔵型の軸流送風機の場合は、
羽根(7)のボス部(9)の内部にロータ(10)が収容
されるので、軸流送風機の全体を小型に構成でき、その
小型軸流送風機において、前記したような送風機向上及
び騒音低下の効果が得られる。
In the above embodiment, the present invention is embodied in an axial fan with a built-in motor, but the present invention is not limited to this and is applied to an axial fan with a motor installed outside. It is also possible to carry out. However, in the case of the axial blower with a built-in motor as in the above embodiment,
Since the rotor (10) is housed inside the boss portion (9) of the blade (7), the entire axial flow blower can be made compact, and in the small axial flow blower, the blower is improved and the noise is reduced as described above. The effect of is obtained.

[発明の効果] 以上のように、本発明の軸流送風機の羽根は、回転軸に
結合される略円筒状のボス部と、そのボス部の外周に放
射状に突設された複数枚の翼部とを具備し、各翼部の間
におけるボス部の外周面に、吸気側及び回転方向側に向
かって深くなる凹部を形成してなるものであるから、限
られた設計条件下で、翼部の吸気側面積を拡大して、送
風量を増大できるとともに、吸込空気をスムーズに流動
案内して、騒音を低下できるという効果がある。
[Advantages of the Invention] As described above, the blade of the axial blower of the present invention has a substantially cylindrical boss portion coupled to the rotating shaft and a plurality of blades radially provided on the outer periphery of the boss portion. And a dent portion that is deepened toward the intake side and the rotation direction side is formed on the outer peripheral surface of the boss portion between the wing portions. There is an effect that the area on the intake side of the portion can be increased to increase the amount of air blown, and the intake air can be smoothly guided to reduce noise.

【図面の簡単な説明】[Brief description of drawings]

第1図は本発明の一実施例を示す軸流送風機の正面図、
第2図は第1図のC−O−D線の拡大断面図、第3図は
第1図のO−A線の要部拡大断面図、第4図は第1図の
O−B線の要部拡大断面図、第5図は羽根の部分斜視
図、第6図は本発明の一実施例の羽根の特性を従来例と
比較して示す特性図、第7図は従来の軸流送風機の羽根
を示す正面図、第8図は第7図のO−A線要部断面図、
第9図は第7図のO−B線要部断面図である。 図において、 6:回転軸、7:羽根 8:翼部、9:ボス部 17:凹部 である。 なお、図中、同一符号及び同一記号は同一または相当部
分を示すものである。
FIG. 1 is a front view of an axial blower showing an embodiment of the present invention,
2 is an enlarged sectional view taken along the line C--O--D in FIG. 1, FIG. 3 is an enlarged sectional view taken along the line O--A in FIG. 1, and FIG. 4 is taken along the line O--B in FIG. FIG. 5 is a partial perspective view of a blade of the present invention, FIG. 5 is a partial perspective view of the blade, FIG. 6 is a characteristic diagram showing characteristics of the blade of one embodiment of the present invention in comparison with a conventional example, and FIG. The front view which shows the blade | wing of a blower, FIG. 8 is sectional drawing of the O-A line main part of FIG. 7,
FIG. 9 is a sectional view of the principal part taken along the line OB of FIG. In the figure, 6: rotary shaft, 7: blade 8: blade portion, 9: boss portion 17: concave portion. In the drawings, the same reference numerals and symbols indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】回転軸に結合される略円筒状のボス部と、
前記ボス部の外周に放射状に突設された複数枚の翼部と
を具備する軸流送風機の羽根において、 前記各翼部の間における前記ボス部の外周面に、回転方
向側及び吸気側の中心軸側に向かって深くなる凹部を形
成してなること特徴とする軸流送風機の羽根。
1. A substantially cylindrical boss portion coupled to a rotating shaft,
In a blade of an axial flow blower comprising a plurality of blades radially provided on the outer periphery of the boss, an outer peripheral surface of the boss between the blades has a rotation direction side and an intake side. A blade of an axial-flow blower, characterized in that a concave portion that becomes deeper toward the central axis side is formed.
JP1276407A 1989-10-24 1989-10-24 Axial blower blades Expired - Lifetime JPH0759958B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1276407A JPH0759958B2 (en) 1989-10-24 1989-10-24 Axial blower blades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1276407A JPH0759958B2 (en) 1989-10-24 1989-10-24 Axial blower blades

Publications (2)

Publication Number Publication Date
JPH03139155A JPH03139155A (en) 1991-06-13
JPH0759958B2 true JPH0759958B2 (en) 1995-06-28

Family

ID=17568976

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1276407A Expired - Lifetime JPH0759958B2 (en) 1989-10-24 1989-10-24 Axial blower blades

Country Status (1)

Country Link
JP (1) JPH0759958B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000065573A (en) * 1999-04-07 2000-11-15 전주범 Fan assembly for an air conditioner
JP7135801B2 (en) 2018-12-03 2022-09-13 日本電産株式会社 motors and fan motors

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135857A (en) * 1977-06-09 1979-01-23 United Technologies Corporation Reduced drag airfoil platforms

Also Published As

Publication number Publication date
JPH03139155A (en) 1991-06-13

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