JP2796788B2 - Cooling fan for fully enclosed external fan motor - Google Patents
Cooling fan for fully enclosed external fan motorInfo
- Publication number
- JP2796788B2 JP2796788B2 JP26955995A JP26955995A JP2796788B2 JP 2796788 B2 JP2796788 B2 JP 2796788B2 JP 26955995 A JP26955995 A JP 26955995A JP 26955995 A JP26955995 A JP 26955995A JP 2796788 B2 JP2796788 B2 JP 2796788B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- cooling fan
- motor
- fan
- peripheral portion
- 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 - Fee Related
Links
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電気分野における
全閉外扇モーターの冷却ファンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling fan for a totally enclosed external fan motor in the electric field.
【０００２】[0002]
【従来の技術】モーターにおいて、一般にその外形面か
ら開放防滴型と全閉外扇型に分類される。2. Description of the Related Art Motors are generally classified into an open drip-proof type and a fully-closed external fan type in terms of their outer surfaces.
【０００３】前者は、モーターのケースに冷却用の開孔
が設けられ、自由に冷却風の通風が行われて、一般的に
騒音が低い。[0003] In the former, a cooling hole is provided in a case of a motor, and cooling air is freely ventilated, so that noise is generally low.
【０００４】一方、後者は、雨水等が入り込まないよう
に、モーターのケースに開孔が設けられていなく、その
ためモーターの発熱を外扇によって冷却しなければなら
ず、騒音が高い。On the other hand, in the latter, the motor case is not provided with an opening so that rainwater or the like does not enter, so that the heat generated by the motor must be cooled by an external fan, and the noise is high.
【０００５】[0005]
【発明が解決しようとする課題】そこで、全閉外扇型の
モーターであっても、開放防滴型のモーターと同等の騒
音レベルとなることが要望されていた。Therefore, it has been demanded that even a fully-closed external fan type motor has a noise level equivalent to that of an open drip-proof type motor.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記のような
点に鑑みたもので、上記の課題を解決するために、全閉
外扇のモーターのモーターケースの反負荷側の後端部
に、冷却ファンの冷却ファン円板をその外周部がモータ
ーケースの後端部の外周部付近となるように軸着すると
ともに、上記冷却ファン円板の外面側に冷却羽根の外径
部が冷却ファン円板の外周部よりも内側となるように冷
却羽根を配設し、上記モーターケースの後カバーを上記
冷却羽根と１０mm以上の間隔を設けてモーターケースに
取り付けたことを特徴とする全閉外扇モーターの冷却フ
ァンを提供するにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made in view of the above-mentioned problems. The cooling fan disk of the cooling fan is axially mounted so that its outer peripheral portion is near the outer peripheral portion of the rear end portion of the motor case, and the outer diameter of the cooling blade is provided on the outer surface side of the cooling fan disk. A completely enclosed external fan, wherein cooling blades are arranged inside the outer periphery of the disk, and a rear cover of the motor case is attached to the motor case at a distance of 10 mm or more from the cooling blades. To provide a motor cooling fan.
【０００７】[0007]
【発明の実施の形態】本発明の全閉外扇モーターは、モ
ーターのモーターケースの反負荷側の後端部に、冷却フ
ァンの冷却ファン円板をその外周部がモーターケースの
後端部の外周部付近となるように軸着するとともに、上
記冷却ファン円板の外面側に冷却羽根の外径部が冷却フ
ァン円板の外周部よりも内側となるように冷却羽根を配
設し、上記モーターケースの後カバーを上記冷却羽根と
１０mm以上の間隔を設けてモーターケースに取り付けた
ことを特徴としている。BEST MODE FOR CARRYING OUT THE INVENTION In a fully enclosed external fan motor according to the present invention, a cooling fan disk of a cooling fan is provided at the rear end of the motor case on the non-load side, and the outer periphery thereof is formed at the outer periphery of the rear end of the motor case. The cooling blade is mounted on the outer surface side of the cooling fan disk such that the outer diameter of the cooling blade is inside the outer peripheral portion of the cooling fan disk. A rear cover of the case is attached to the motor case at a distance of 10 mm or more from the cooling blade.
【０００８】モーターは、全閉状態としたモーターケー
スの外周部に冷却用のファンを配設していて、その回転
軸を突き出した前面側と反対の反負荷側の後面側に後カ
バーを取着して、その内側に外扇の冷却ファンを軸着し
て配設している。In the motor, a cooling fan is provided on the outer periphery of the motor case in a fully closed state, and a rear cover is attached to a rear surface opposite to the front side from which the rotating shaft protrudes and opposite to the load side. The cooling fan of the outer fan is mounted on the inside of the cooling fan.
【０００９】上記冷却ファンは、その冷却ファン円板を
軸着部からモーターケースの外周部付近に向ってわん曲
させてモ−タ−ケ−スの側周部への冷却風の案内となる
ように形成し、その外面側に冷却羽根を放射状に突設し
ている。In the above cooling fan, the cooling fan disk is bent from the shaft attachment portion to the vicinity of the outer peripheral portion of the motor case to guide cooling air to the side peripheral portion of the motor case. The cooling blades are radially protruded from the outer surface thereof.
【００１０】冷却羽根は、その外周部が冷却ファン円板
の外周部から周側に突き出さずに内側となるように配設
して、風量は少なくなるけれども、騒音が少なくなるよ
うにしている。[0010] The cooling blades are arranged so that the outer peripheral portion thereof is inward without protruding from the outer peripheral portion of the cooling fan disk to the peripheral side, so that the air volume is reduced, but the noise is reduced. .
【００１１】上記冷却羽根の外径の寸法としては、冷却
ファン円板の外径の７５％以下が好ましく、冷却ファン
円板の７５％以上より大きくなると、騒音の低減効果に
乏しくなって好ましくない。The outer diameter of the cooling blade is preferably not more than 75% of the outer diameter of the cooling fan disk. If the outer diameter is larger than 75% of the cooling fan disk, the effect of reducing noise is poor, which is not preferable. .
【００１２】また、上記冷却ファン円板の外周部をモー
ターケースの外周部付近に位置させることから、冷却フ
ァン円板の内側に冷却風が回り込みにくくなるので、冷
却ファン円板の内面側に軸受冷却羽根を配設して、モー
ターの軸受部を適切に冷却できるようにしている。Further, since the outer peripheral portion of the cooling fan disk is located near the outer peripheral portion of the motor case, it is difficult for cooling air to flow inside the cooling fan disk, so that a bearing is provided on the inner surface side of the cooling fan disk. Cooling blades are provided so that the bearings of the motor can be cooled appropriately.
【００１３】上記軸受冷却羽根は、その目的を達成でき
る範囲において、できるだけ突出量を少なく、外径も小
さくできるものである。The above-mentioned bearing cooling blades can have as small an amount of protrusion as possible and a small outer diameter as long as the object can be achieved.
【００１４】このように構成した冷却ファンの冷却羽根
と後カバーとの間を１０mm以上の十分な距離を離して後
カバーをモーターケースに取着し、冷却羽根を旋回する
ことにより後カバーの内側部の空気をモーターケースの
側面の冷却用のフィン側に送給してモーターを冷却する
ようにしている。The rear cover is attached to the motor case with a sufficient distance of 10 mm or more between the cooling blades of the cooling fan and the rear cover configured as described above. The air is supplied to the cooling fins on the side of the motor case to cool the motor.
【００１５】上記のように冷却ファンの冷却羽根と後カ
バーとの間を１０mm以上離すと、冷却風が円滑に流れて
騒音を著しく低減できる。なお、上記の間隔は、モータ
ーが不当に大きくならない限り適宜な距離とすることが
できる。When the distance between the cooling blades of the cooling fan and the rear cover is at least 10 mm as described above, the cooling air flows smoothly and noise can be significantly reduced. Note that the above-mentioned interval can be set to an appropriate distance unless the motor becomes unduly large.
【００１６】[0016]
【実施例】図１以下は、本発明の一実施例を示すもので
ある。全閉外扇のモーター１は、図１のようにモーター
ケース２に冷却孔を開孔せずに周部に冷却用のファン３
を配設している。FIG. 1 shows an embodiment of the present invention. As shown in FIG. 1, the motor 1 of the fully closed external fan has a cooling fan 3 around its periphery without opening a cooling hole in the motor case 2.
Is arranged.
【００１７】そして、回転軸４を突き出した前面側の負
荷側と反対の反負荷側の後面側に後カバー５を取着し、
その内側に外扇の冷却ファン６を回転軸４に軸着してい
る。Then, a rear cover 5 is attached to a rear surface side opposite to the load side on the front side from which the rotary shaft 4 protrudes,
A cooling fan 6 of an external fan is axially mounted on the rotation shaft 4 inside thereof.
【００１８】上記冷却ファン６は、図１、図２のように
その冷却ファン円板７を後カバー５にそうようにして軸
着部８からモーターケース２の外周部付近に向かってわ
ん曲させて冷却風の案内となるように形成していて、そ
の外面側に図３のように冷却羽根９を放射状に突設して
モ−タ−１の外周部のフイン３を冷却するようにしてい
る。As shown in FIGS. 1 and 2, the cooling fan 6 has its cooling fan disk 7 bent toward the rear cover 5 from the shaft attachment portion 8 to the vicinity of the outer peripheral portion of the motor case 2. As shown in FIG. 3, cooling blades 9 are protruded radially outwardly to cool the fins 3 on the outer periphery of the motor-1. I have.
【００１９】上記冷却羽根９の外径としては、冷却ファ
ン円板７の外径の７５％とし、冷却羽根９と後カバー５
との間を１０mm離して後カバー５をモーターケース２に
取着して、騒音を低減するようにしている。The outer diameter of the cooling blade 9 is 75% of the outer diameter of the cooling fan disk 7, and the cooling blade 9 and the rear cover 5
The rear cover 5 is attached to the motor case 2 with a distance of 10 mm between the rear cover and the motor case 2 to reduce noise.
【００２０】また、上記冷却ファン円板７の外径をモー
ターケース２の外径と同一またはやや小さくして外周部
付近に位置させることから、図１のように冷却ファン円
板７の内面側に軸受冷却羽根１０を配設し、モーター１
の軸受部１１を冷却できるようにしている。なお、後カ
バ−５の中央側には、従来通りの冷却風流入用開孔１２
を開孔している。Since the outer diameter of the cooling fan disk 7 is the same as or slightly smaller than the outer diameter of the motor case 2 and is located near the outer peripheral portion, as shown in FIG. The bearing cooling blades 10 are arranged in the
Can be cooled. At the center side of the rear cover 5, a cooling air inflow hole 12 as in the related art is provided.
The hole is opened.
【００２１】上記したモーターについて、騒音の温度の
測定を行った。図５のように冷却ファンの外径Ｄ1 に対
して冷却羽根の外径Ｄ0 をいろいろ変えて騒音を測定し
た結果、Ｄ0 ／Ｄ1 が７５％以下において、騒音低下の
効果が認められた。なお、測定はモーター後方１ｍの位
置である。The temperature of the noise was measured for the motor described above. Various altered result of measuring the noise and the outer diameter D 0 of the cooling vanes relative to the outer diameter D 1 of the cooling fan as shown in FIG. 5, D 0 / D 1 is at 75% or less, it observed the effect of lowering the noise Was. The measurement was taken at a position 1 m behind the motor.
【００２２】また、図６のように冷却ファンの冷却羽根
と後カバーの間隔と騒音の関係について調べた結果、間
隔Ｗに対して冷却羽根の高さＨの比、Ｗ／Ｈが０．７以
上で騒音低下の効果が認められた。そのときのＨ＝１５
ｍｍからＷが１０ｍｍ以上で有効と考えられる。As shown in FIG. 6, the relationship between the spacing between the cooling blades of the cooling fan and the rear cover and the noise was examined. As a result, the ratio of the height H of the cooling blades to the spacing W, W / H was 0.7. Above, the effect of noise reduction was recognized. H = 15 at that time
It is considered to be effective when W is 10 mm or more from mm.
【００２３】またさらに、軸受冷却羽根の効果について
も測定した結果、上記のように冷却ファン円板をモータ
ーの後側部に近接しているにもかかわらず、反負荷側の
軸受部の温度を７２〜７４℃、コイル温度を９４〜１０
１℃に抑えることができた。Furthermore, as a result of measuring the effect of the bearing cooling blades, it was found that the temperature of the bearing portion on the non-load side was reduced even though the cooling fan disk was close to the rear portion of the motor as described above. 72-74 ° C, coil temperature 94-10
It could be kept at 1 ° C.
【００２４】また、実施側では、図３、図４のように冷
却羽根、軸受冷却羽根を放射状の直線状に配設したの
で、製造が容易で、かつ風量も高めることができた。ま
たさらに、冷却羽根、軸受冷却羽根を円周方向に７等分
して配設し、かつこれらを非放射位置に配設しているた
め、死点の解消がはかれて、円滑に冷却ファンを回転駆
動できたとともに、後カバ−に軸対象状に６個所に開孔
した開孔部との共振現象も生じなくできた。In the embodiment, since the cooling blades and the bearing cooling blades are arranged in a radial straight line as shown in FIGS. 3 and 4, the manufacture is easy and the air volume can be increased. Further, since the cooling blades and the bearing cooling blades are arranged at equal intervals in the circumferential direction and are arranged at the non-radiation position, the dead center can be eliminated and the cooling fan can be smoothly operated. Was able to be driven to rotate, and the resonance phenomenon with the apertures opened at six locations in the rear cover so as to be axially symmetric was also prevented.
【００２５】[0025]
【発明の効果】以上のように本発明になっては、全閉外
扇型のモーターであるにもかかわらず、開放防滴型と同
じような騒音レベルに低減することができる。As described above, according to the present invention, the noise level can be reduced to the same level as that of the open drip-proof type despite the fact that the motor is a fully-closed external fan type.
【００２６】また、冷却ファン円板の内面側にモーター
の軸受部を冷却する軸受冷却羽根を配設することによっ
て、モーターの軸受部が昇温するのを防止できる。Further, by providing bearing cooling blades for cooling the bearing of the motor on the inner surface side of the cooling fan disk, it is possible to prevent the bearing of the motor from rising in temperature.
【００２７】さらに、冷却フアン円板をモ−タ−の外周
部にわん曲して配設することによって、冷却風を円滑
に、かつ効率よく送給できて、モーターを冷却すること
ができる。Further, by arranging the cooling fan disk in a curved shape on the outer peripheral portion of the motor, the cooling air can be smoothly and efficiently supplied, and the motor can be cooled.
【図１】本発明の一実施例の側半断面図、FIG. 1 is a side half sectional view of an embodiment of the present invention;
【図２】同上の冷却ファンの側断面図、FIG. 2 is a side sectional view of the cooling fan according to the first embodiment;
【図３】同上の冷却ファンの正面図、FIG. 3 is a front view of the cooling fan,
【図４】同上の冷却ファンの背面図。FIG. 4 is a rear view of the cooling fan.
【図５】同上の冷却ファン円板外径と冷却羽根外径との
関係の騒音状態図、FIG. 5 is a noise state diagram showing the relationship between the outer diameter of the cooling fan disk and the outer diameter of the cooling blade,
【図６】同上の冷却ファンの冷却羽根と後カバーとの間
隔と騒音の関係図。FIG. 6 is a diagram showing the relationship between the distance between the cooling blades of the cooling fan and the rear cover and noise.
１…モーター ２…モーターケース ３…
ファン ４…回転軸 ５…後カバー ６…
冷却ファン ７…冷却ファン円板 ９…冷却羽根 １０…
軸受冷却羽根 １１…軸受部1 ... motor 2 ... motor case 3 ...
Fan 4 ... Rotating shaft 5 ... Rear cover 6 ...
Cooling fan 7 ... Cooling fan disk 9 ... Cooling blade 10 ...
Bearing cooling blade 11 ... Bearing part
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H02K 9/00 - 9/28 F04D 29/18 - 29/38Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) H02K 9/00-9/28 F04D 29/18-29/38
Claims (5)
反負荷側の後端部に、冷却ファンの冷却ファン円板をそ
の外周部がモーターケースの後端部の外周部付近となる
ように軸着するとともに、上記冷却ファン円板の外面側
に冷却羽根の外径部が冷却ファン円板の外周部よりも内
側となるように冷却羽根を配設し、 上記モーターケースの後カバーを上記冷却羽根と１０mm
以上の間隔を設けてモーターケースに取り付けたことを
特徴とする全閉外扇モーターの冷却ファン。1. A cooling fan disk for a cooling fan is mounted on a rear end of a motor case of a motor of a fully-closed external fan on a non-load side of a motor so that an outer peripheral portion thereof is near an outer peripheral portion of a rear end of the motor case. At the same time, cooling blades are arranged on the outer surface side of the cooling fan disk such that the outer diameter of the cooling blade is inside the outer peripheral portion of the cooling fan disk, and the rear cover of the motor case is cooled. Feather and 10mm
A cooling fan for a fully-closed external fan motor, wherein the cooling fan is attached to the motor case with the above intervals.
受部を冷却する軸受冷却羽根を配設した請求項１に記載
の全閉外扇モーターの冷却ファン。2. The cooling fan according to claim 1, wherein bearing cooling blades for cooling a bearing portion of the motor are provided on an inner surface side of the cooling fan disk.
却ファン円板の外径よりも７５％の寸法とした請求項１
または２に記載の全閉外扇モーターの冷却ファン。3. An outer diameter of a cooling blade of the cooling fan disk is 75% of an outer diameter of the cooling fan disk.
Or the cooling fan of the totally enclosed external fan motor according to 2.
モ−タ−ケ−スの後端部の外周部付近に延長するととも
に、モ−タ−ケ−スの側周部への冷却風の案内部となる
ように滑らかな曲面形状に形成した請求項１ないし３の
いずれかに記載の全閉外扇モーターの冷却ファン。4. An outer peripheral portion of a cooling fan disk of the cooling fan is extended near an outer peripheral portion of a rear end portion of the motor case, and cooling to a side peripheral portion of the motor case. 4. The cooling fan for a fully-closed external fan motor according to claim 1, wherein the cooling fan is formed into a smooth curved surface so as to serve as a wind guide.
求項１ないし４のいずれかに記載の全閉外扇モーターの
冷却ファン。5. A cooling fan for a fully enclosed external fan motor according to claim 1, wherein the cooling blades are arranged in a radial straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26955995A JP2796788B2 (en) | 1995-09-21 | 1995-09-21 | Cooling fan for fully enclosed external fan motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26955995A JP2796788B2 (en) | 1995-09-21 | 1995-09-21 | Cooling fan for fully enclosed external fan motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0993867A JPH0993867A (en) | 1997-04-04 |
| JP2796788B2 true JP2796788B2 (en) | 1998-09-10 |
Family
ID=17474071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26955995A Expired - Fee Related JP2796788B2 (en) | 1995-09-21 | 1995-09-21 | Cooling fan for fully enclosed external fan motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2796788B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560619A (en) * | 2013-10-09 | 2014-02-05 | 苏州首信电机有限公司 | Low-noise dual-function cooling fan device of motor of dust collector |
-
1995
- 1995-09-21 JP JP26955995A patent/JP2796788B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0993867A (en) | 1997-04-04 |
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