JPH0779539A - Vibration isolator for fan motor - Google Patents
Vibration isolator for fan motorInfo
- Publication number
- JPH0779539A JPH0779539A JP22174093A JP22174093A JPH0779539A JP H0779539 A JPH0779539 A JP H0779539A JP 22174093 A JP22174093 A JP 22174093A JP 22174093 A JP22174093 A JP 22174093A JP H0779539 A JPH0779539 A JP H0779539A
- Authority
- JP
- Japan
- Prior art keywords
- fan
- vibration
- peripheral portion
- fan motor
- rotor shaft
- 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
Landscapes
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、ルームエアコンや給湯
機に使用されるファンモータの防振装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolation device for fan motors used in room air conditioners and water heaters.
【0002】[0002]
【従来の技術】近年、送風あるいは燃焼効率の点からフ
ァンモータの回転数制御を頻繁に行うようになってきて
おり、ますますファンモータの振動の変動が大きくな
り、不快な振動、騒音の発生が増大している傾向にあ
る。2. Description of the Related Art In recent years, the rotation speed of a fan motor has been frequently controlled from the viewpoint of air blowing or combustion efficiency, and the fluctuation of vibration of the fan motor becomes more and more large, which causes unpleasant vibration and noise. Are tending to increase.
【0003】従来のこの種のファンモータについて、図
5を参照しながら説明する。図に示すように、ファンモ
ータはステータ11とロータ14とから構成されてお
り、ロータ14はステータ11にベアリング10を介し
て回転自在に組み付けられている。A conventional fan motor of this type will be described with reference to FIG. As shown in the figure, the fan motor is composed of a stator 11 and a rotor 14, and the rotor 14 is rotatably assembled to the stator 11 via a bearing 10.
【0004】このロータを構成するロータ軸9には、フ
ァン5が固定用ワッシャ板7a,7bを介し、さらにそ
の間にロータ軸9の回転変動をファン5に伝達しにくく
するために防振ゴムワッシャ22をサンドイッチ構造に
配設して、ナット8で一体に固着されている。The fan 5 is attached to the rotor shaft 9 which constitutes this rotor through fixing washer plates 7a and 7b, and in order to make it difficult to transmit the rotational fluctuation of the rotor shaft 9 to the fan 5, a vibration isolating rubber washer is provided. 22 are arranged in a sandwich structure and are integrally fixed by a nut 8.
【0005】これは、ロータが回転した際ロータが発生
する振動がファンに伝達され、共振現象により不快な振
動、騒音が発生するのを防止している。This prevents vibrations generated by the rotor when the rotor is rotated from being transmitted to the fan and causing unpleasant vibrations and noises due to the resonance phenomenon.
【0006】[0006]
【発明が解決しようとする課題】上記防振効果を大きく
するためには、防振ゴムワッシャ22の厚みを大きく
し、さらに固定用ナット8の締め付け量をできるだけ小
さくすることが望ましい。In order to increase the above-mentioned vibration-proof effect, it is desirable to increase the thickness of the vibration-proof rubber washer 22 and further reduce the tightening amount of the fixing nut 8.
【0007】しかし、このようにするとロータからの振
動はファンには伝達しにくくなるが、ファンが回転した
際にファンが振れ、送風量が安定しない、ファンがファ
ンケースと干渉する等致命的な不具合が発生する原因と
なる。However, in this way, the vibration from the rotor is less likely to be transmitted to the fan, but when the fan rotates, the fan shakes, the amount of blown air is unstable, and the fan interferes with the fan case. This will cause trouble.
【0008】また、防振にゴムワッシャを使用した場合
には組立工数が増えるためコスト的に不利であり、また
ゴムワッシャの耐熱性にも問題点を有していた。Further, when a rubber washer is used for vibration isolation, the number of assembling steps is increased, which is disadvantageous in terms of cost, and there is a problem in heat resistance of the rubber washer.
【0009】本発明は上記従来の問題点を解決するもの
であり、コストアップや製造工程を増加させることなし
に、耐熱性、信頼性、防振性に優れたファンモータを提
供することを目的とする。The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a fan motor having excellent heat resistance, reliability, and vibration isolation without increasing costs or increasing manufacturing steps. And
【0010】[0010]
【課題を解決するための手段】この目的を達成するため
に、本発明のファンモータの防振装置はロータ軸にファ
ンを固着させる内周部と、ファンの羽根が配設される外
周部と、上記内周部と外周部を連結する複数の締結部と
で構成してなるものである。In order to achieve this object, a vibration isolator for a fan motor according to the present invention comprises an inner peripheral portion for fixing the fan to a rotor shaft, and an outer peripheral portion on which fan blades are arranged. The inner peripheral portion and the outer peripheral portion are connected to each other by a plurality of fastening portions.
【0011】[0011]
【作用】上記構成によれば、ロータ軸に発生する回転方
向の振動をファンに伝達しにくくするものであり、以下
にその作用を説明する。According to the above construction, it is difficult to transmit the vibration in the rotating direction generated in the rotor shaft to the fan. The operation will be described below.
【0012】図4にねじり振動系の一例を示している
が、ねじり系の固有振動数は一般に式(1)により求め
ることができる。 固有振動数=(K(J1+J2)/J1J2)0.5/2π(Hz) ……… (1) J1:ロータの慣性 J2:ファンの慣性 K:この場合、ファンの外周部と内周部を複数の締結部
により連結することにより生じるファンの回転方向のね
じりバネ定数 防振理論より、式(1)の固有振動数を遮断周波数の
(1/2)0.5以下にすればよく、その差が大きくなる
ほど防振効果も大きくなる。この場合、内周部と外周部
を締結する締結部は所要のトルクを伝達する力に耐える
こと、およびファンの回転ぶれが用途により許容範囲に
保つという以外は、防振性能面より可能な限り剛性を小
さくすることができる。また、ファンモータにおいて確
保しなければならないファンとファンケースとの間の隙
間は、半径方向に剛性が大きい形状をしている締結部分
により、均一に保たれる。FIG. 4 shows an example of the torsional vibration system, but the natural frequency of the torsional system can be generally obtained by the equation (1). Natural frequency = (K (J 1 + J 2 ) / J 1 J 2 ) 0.5 / 2π (Hz) ………… (1) J 1 : Rotor inertia J 2 : Fan inertia K: In this case, fan circumference Torsional spring constant in the direction of rotation of the fan generated by connecting the inner and inner parts with multiple fastening parts. From the vibration isolation theory, the natural frequency of equation (1) can be set to (1/2) 0.5 or less of the cutoff frequency. The better the difference, the greater the anti-vibration effect. In this case, except for the fact that the fastening part that fastens the inner and outer circumferences withstands the force that transmits the required torque, and that the rotational fluctuation of the fan is kept within an allowable range depending on the application, it is as much as possible from the standpoint of anti-vibration performance. The rigidity can be reduced. In addition, the gap between the fan and the fan case, which must be ensured in the fan motor, is uniformly maintained by the fastening portion having a shape having a large rigidity in the radial direction.
【0013】[0013]
【実施例】以下、本発明の一実施例を図1,図2,図3
を参照しながら説明する。なお、従来例で説明したもの
と同一構成部材には同一番号を用いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. The same numbers are used for the same components as those described in the conventional example.
【0014】図に示すように、ファン5はロータ軸9と
一体固定される内周部3とファン5の羽根6が配設され
る外周部4を有し、内周部3と外周部4とを締結材2で
連結し、空隙23を形成している。As shown in the drawing, the fan 5 has an inner peripheral portion 3 integrally fixed to the rotor shaft 9 and an outer peripheral portion 4 on which the blades 6 of the fan 5 are arranged, and the inner peripheral portion 3 and the outer peripheral portion 4 are provided. Are connected with the fastening material 2 to form the void 23.
【0015】以上のように構成されたファンモータのフ
ァンについて、図2を用いてその動作を説明する。図2
は締結材2の部分の拡大図である。締結材2の剛性は幅
Wと長さLの大きさにより選定できるようにしたもので
ある。The operation of the fan of the fan motor configured as described above will be described with reference to FIG. Figure 2
[FIG. 3] is an enlarged view of a portion of the fastening material 2. The rigidity of the fastening member 2 can be selected by the width W and the length L.
【0016】ファンモータが実際に使用される条件に応
じて締結材2の剛性を調整することにより、ロータに発
生するコギングトルク変動等の振動を連結材27が点線
で示す2bの状態から実線で示す2aの状態のごとく変
形し、ロータ軸の振動をファンに伝達しにくくする様子
を図2は示している。By adjusting the rigidity of the fastening member 2 in accordance with the conditions under which the fan motor is actually used, vibrations such as fluctuations in the cogging torque generated in the rotor are indicated by a solid line from the state 2b in which the connecting member 27 is indicated by a dotted line. FIG. 2 shows a state in which the vibration of the rotor shaft is difficult to be transmitted to the fan by deforming like the state 2a shown.
【0017】この場合、本実施例のファンと従来の一般
的なファンを図3で示すようなDCブラシレスファンモ
ータに組み付け運転し比較すると、図示していないがD
Cブラシレスファンモータから発生される音は、本実施
例のファンを装着したファンモータの方が約10dB低
減されることを確認している。また、本実施例のファン
は締結材による防振構造がファンに一体に構成されてい
ることより、従来の防振ゴムを使用する場合と比較し
て、コストアップや製造工程を増加させずに実施するこ
とができる。In this case, when the fan of this embodiment and the conventional general fan are assembled and operated in a DC brushless fan motor as shown in FIG.
It has been confirmed that the sound generated from the C brushless fan motor is reduced by about 10 dB in the fan motor equipped with the fan of this embodiment. Further, in the fan of the present embodiment, since the vibration isolating structure using the fastening material is integrally formed with the fan, the cost and manufacturing process are not increased as compared with the case where the conventional vibration isolating rubber is used. It can be carried out.
【0018】[0018]
【発明の効果】以上の実施例の説明から明らかなよう
に、ファンをロータ軸に固定させる内周部分とファンの
羽根が配設される外周部を複数の締結材で連結し、その
形状を適宜選定することにより、効果的に振動が吸収で
きるとともに、ゴム等を使用することによる熱変形、経
時変化等の不安定要因を除去できる。さらに、本発明に
よるファンはコストアップや製造工程を増加させずに耐
久性、信頼性、防振性に優れたファンモータのファンが
提供可能になる。As is apparent from the above description of the embodiments, the inner peripheral portion for fixing the fan to the rotor shaft and the outer peripheral portion where the fan blades are arranged are connected by a plurality of fastening members, and their shapes are changed. By proper selection, vibrations can be effectively absorbed, and unstable factors such as thermal deformation and aging due to the use of rubber can be eliminated. Further, the fan according to the present invention can provide a fan of a fan motor excellent in durability, reliability, and vibration isolation without increasing costs and increasing manufacturing processes.
【図1】本発明の一実施例におけるファンモータの防振
装置の一部切り欠き断面斜視図FIG. 1 is a partially cutaway sectional perspective view of a vibration isolation device for a fan motor according to an embodiment of the present invention.
【図2】本発明の一実施例におけるファンモータの防振
装置のファン締結材部分の拡大図FIG. 2 is an enlarged view of a fan fastening material portion of a vibration isolation device for a fan motor according to an embodiment of the present invention.
【図3】本発明の一実施例におけるファンモータの組立
図FIG. 3 is an assembly diagram of a fan motor according to an embodiment of the present invention.
【図4】ねじり振動系の一例を示す斜視図FIG. 4 is a perspective view showing an example of a torsional vibration system.
【図5】従来のファンモータの断面図FIG. 5 is a sectional view of a conventional fan motor.
1 ロータ軸取付穴 2,2a,2b 締結材 3 内周部 4 外周部 6 羽根 7a,7b 固定用ワッシャ板 8 ナット 9 ロータ軸 10 ベアリング 11 ステータ 14 ロータ 22 防振ゴムワッシャ 23 空隙 1 rotor shaft mounting hole 2, 2a, 2b fastening material 3 inner peripheral part 4 outer peripheral part 6 blades 7a, 7b fixing washer plate 8 nut 9 rotor shaft 10 bearing 11 stator 14 rotor 22 anti-vibration rubber washer 23 void
Claims (2)
部にロータ軸と固定されるロータ軸取付穴を設け、かつ
前記外周部と内周部とを複数の締結材で連結してなるフ
ァンモータの防振装置。1. A fan blade portion is provided on an outer peripheral portion, a rotor shaft mounting hole for fixing a rotor shaft is provided on an inner peripheral portion, and the outer peripheral portion and the inner peripheral portion are connected by a plurality of fastening members. Anti-vibration device for fan motors.
ータ軸に固定される内周部と、前記外周部と内周部を連
結する複数の締結材を一体に構成したファンモータの防
振装置。2. A fan motor comprising an outer peripheral portion for arranging blades on a fan, an inner peripheral portion fixed to a rotor shaft, and a plurality of fasteners for connecting the outer peripheral portion and the inner peripheral portion, which are integrally formed. Anti-vibration device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22174093A JPH0779539A (en) | 1993-09-07 | 1993-09-07 | Vibration isolator for fan motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22174093A JPH0779539A (en) | 1993-09-07 | 1993-09-07 | Vibration isolator for fan motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0779539A true JPH0779539A (en) | 1995-03-20 |
Family
ID=16771491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22174093A Pending JPH0779539A (en) | 1993-09-07 | 1993-09-07 | Vibration isolator for fan motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0779539A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011158471A1 (en) * | 2010-06-14 | 2011-12-22 | パナソニック株式会社 | Fan motor, on-vehicle air conditioner using the fan motor, and method for assembling fan motor |
JP2013059140A (en) * | 2011-09-07 | 2013-03-28 | Panasonic Corp | Fan motor, on-vehicle air conditioner using the fan motor, and method of assembling fan motor |
ITUB20152894A1 (en) * | 2015-08-05 | 2017-02-05 | Spal Automotive Srl | AXIAL FAN |
-
1993
- 1993-09-07 JP JP22174093A patent/JPH0779539A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011158471A1 (en) * | 2010-06-14 | 2011-12-22 | パナソニック株式会社 | Fan motor, on-vehicle air conditioner using the fan motor, and method for assembling fan motor |
CN102939701A (en) * | 2010-06-14 | 2013-02-20 | 松下电器产业株式会社 | Fan motor, on-vehicle air conditioner using the fan motor, and method for assembling fan motor |
US9214840B2 (en) | 2010-06-14 | 2015-12-15 | Panasonic Intellectual Property Management Co., Ltd. | Fan motor, on-vehicle air conditioner using the fan motor, and method for assembling fan motor |
JP5934917B2 (en) * | 2010-06-14 | 2016-06-15 | パナソニックIpマネジメント株式会社 | Fan motor, in-vehicle air conditioner using the fan motor, and fan motor assembly method |
EP2582023A4 (en) * | 2010-06-14 | 2017-12-13 | Panasonic Corporation | Fan motor, on-vehicle air conditioner using the fan motor, and method for assembling fan motor |
JP2013059140A (en) * | 2011-09-07 | 2013-03-28 | Panasonic Corp | Fan motor, on-vehicle air conditioner using the fan motor, and method of assembling fan motor |
ITUB20152894A1 (en) * | 2015-08-05 | 2017-02-05 | Spal Automotive Srl | AXIAL FAN |
WO2017021935A1 (en) * | 2015-08-05 | 2017-02-09 | Spal Automotive S.R.L. | Axial fan |
US10577941B2 (en) | 2015-08-05 | 2020-03-03 | Spal Automotive S.R.L. | Axial fan |
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