JPH0211896A - Bearing device for electric blower and magnetizing method for permanent magnet used in this bearing device - Google Patents
Bearing device for electric blower and magnetizing method for permanent magnet used in this bearing deviceInfo
- Publication number
- JPH0211896A JPH0211896A JP63161584A JP16158488A JPH0211896A JP H0211896 A JPH0211896 A JP H0211896A JP 63161584 A JP63161584 A JP 63161584A JP 16158488 A JP16158488 A JP 16158488A JP H0211896 A JPH0211896 A JP H0211896A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- rotor
- outside
- load side
- bearing
- 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
- 238000000034 method Methods 0.000 title claims description 4
- 230000005415 magnetization Effects 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 241000244317 Tillandsia usneoides Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C39/00—Relieving load on bearings
- F16C39/06—Relieving load on bearings using magnetic means
- F16C39/063—Permanent magnets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/04—Ball or roller bearings, e.g. with resilient rolling bodies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/0408—Passive magnetic bearings
- F16C32/0423—Passive magnetic bearings with permanent magnets on both parts repelling each other
- F16C32/0429—Passive magnetic bearings with permanent magnets on both parts repelling each other for both radial and axial load, e.g. conical magnets
- F16C32/0431—Passive magnetic bearings with permanent magnets on both parts repelling each other for both radial and axial load, e.g. conical magnets with bearings for axial load combined with bearings for radial load
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/44—Centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、真空掃除機などに使用する電動送風機の磁気
軸受装置並びにこの磁気軸受装置に用いる永久磁石の着
磁方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic bearing device for an electric blower used in a vacuum cleaner or the like, and a method of magnetizing a permanent magnet used in the magnetic bearing device.
従来の技術
従来の真空掃除機用などの電動送風機は、第５図に示す
ように（実公昭５５−１６１５９号公報）、ブラケット
１とモータハウジング４内にローター３が、ポールベア
リン６にて保持されている。2. Description of the Related Art In a conventional electric blower for a vacuum cleaner, etc., as shown in FIG. has been done.
発明が解決しようとする課題
従来の電動送風機は、ローター３やファン９のアンバラ
ンスが回転によりボールベアリング５を３ Ｘ−・
汗してブラケット１とモータハウシング４に伝わって振
動となり、真空掃除機の振動音となっていた。静かな掃
除機を実現しようとすると、ロータや、ファンのアンバ
ランスを高梢度に取るために設備コストがかさんだり、
モーりを真空掃除機内で保持する防振ゴムにコストを多
くかけたりしなければならないという問題点があった。Problems to be Solved by the Invention In conventional electric blowers, the unbalance of the rotor 3 and fan 9 rotates and causes the ball bearing 5 to vibrate due to sweat, which is transmitted to the bracket 1 and motor housing 4, causing vibrations in the vacuum cleaner. It was a vibrating sound. If you try to create a quiet vacuum cleaner, the equipment costs will increase because you have to take care of the unbalanced rotor and fan to a high degree.
There is a problem in that a large amount of cost must be spent on vibration-proof rubber to hold the mower inside the vacuum cleaner.
本発明は、ローターやファンに多少のアンバランスがあ
っても、ローター、ファンの回転アンバランス振動がモ
ータブラケットに伝わらス、振動音の少ない静かな電動
送風機を得ることを目的としている。An object of the present invention is to provide a quiet electric blower with less vibration noise and which prevents unbalanced rotational vibrations of the rotor and fan from being transmitted to the motor bracket even if the rotor and fan are slightly unbalanced.
課題を解決するための手段
上記目的を達成するために、本発明においては、ロータ
ーの軸受を永久磁石を用いた反発式の磁気軸受で構成し
たものである。Means for Solving the Problems In order to achieve the above object, in the present invention, the bearing of the rotor is constituted by a repulsion type magnetic bearing using permanent magnets.
上記磁気軸受のローター側には、シャフトに小形のボー
ルベアリングを内蔵し、その外側に永久磁石を設けたも
のが、ローターの両端に設けられる。モータの負荷側（
ファン側）ブラケットと反負荷側ブラケットには、これ
らに対応して、ロタ−側の永久磁石とは反磁性に着磁さ
れた永久磁石が設置され、永久磁石が反発し合い、ロー
タは空中に浮く。On the rotor side of the magnetic bearing, a small ball bearing is built into the shaft, and a permanent magnet is provided on the outside of the ball bearing, which is provided at both ends of the rotor. Motor load side (
Correspondingly, permanent magnets are installed on the fan side) bracket and anti-load side bracket, which are magnetized diamagnetically from the permanent magnet on the rotor side.The permanent magnets repel each other, and the rotor is suspended in the air. float.
そして上記永久磁石は環状で、断面がコの字形状とし、
ブラケット側の永久磁石より、ローター側の永久磁石を
１回り小さくし、その外側をブラケット側の永久磁石が
覆うようにしである。この永久磁石の着磁は、ローグー
の負荷側永久磁石を外面Ｎ極、内面Ｓ極とし、負荷側ブ
ラケットの永久磁石を外面Ｓ極９内面Ｎ極とし、ロータ
ーの反負荷側永久磁石を外面Ｓ極、内面Ｎ極２反負荷側
ブラケットの永久磁石を外面Ｎ極、内面Ｓ極としである
。この着磁は、断面Ｅ形の環状の着磁ヨークの中央部に
着磁コイルが巻いてあり、その中央にローター負荷側の
永久磁石用コアーを被せ、さらにその外側に、ローター
側の永久磁石とブラケット側の永久磁石の隙間に相当す
る断面コの字状の鉄キャップを被せ、その外側へ反負荷
側の永久磁石用コアーを置き、その上にこの永久磁石用
コ５ ・＼−５
アーの外側を覆い、Ｅ形ヨークの蓋をする第２のヨーク
を置いて永久磁石の着磁を行う。The permanent magnet is annular and has a U-shaped cross section,
The permanent magnet on the rotor side is one size smaller than the permanent magnet on the bracket side, and the permanent magnet on the bracket side covers the outside. The permanent magnets are magnetized such that the permanent magnet on the load side of the rotor has an outer surface N pole and an inner surface S pole, the permanent magnet on the load side bracket has an outer surface S pole and an inner surface N pole, and the counter load side permanent magnet of the rotor has an outer surface S pole. The permanent magnet of the anti-load side bracket has an outer N pole and an inner S pole. In this magnetization, a magnetizing coil is wound around the center of an annular magnetizing yoke with an E-shaped cross section, a permanent magnet core on the rotor load side is placed over the center, and a permanent magnet core on the rotor side is placed on the outside of the core. Cover the iron cap with a U-shaped cross section corresponding to the gap between the permanent magnet on the bracket side, place the permanent magnet core on the anti-load side on the outside of it, and place the permanent magnet core on top of it. A second yoke is placed to cover the outside of the E-shaped yoke and to magnetize the permanent magnet.
次に、ローター負荷側の永久磁石用コアーにかえて、ロ
ーター反負荷側の永久磁石用コアーを、反負荷側ブラケ
ットにかえて、負荷側ブラケットの永久磁石用コアーを
置き、着磁コイルの通電方向をかえて永久磁石の着磁を
行う製造方法である。Next, replace the permanent magnet core on the rotor load side with the permanent magnet core on the rotor anti-load side with the anti-load side bracket, place the permanent magnet core on the load side bracket, and energize the magnetizing coil. This is a manufacturing method in which permanent magnets are magnetized by changing the direction.
作 用
上記のように構成された電動送風機を運転するト、ロー
ターやファンに多少のアンバランスがあっても、ロータ
ーは磁石の反発によって空中に浮いているため、アンバ
ランスによるローターシャフトの回転振動は、ブラケッ
トへはほとんど伝わらず、もちろん、従来のように、ボ
ールベアリンクのボールの傷や、ゴミをボールの摺動面
にかみ込んだりした時の振動は々く、非常に低振動な運
転が得られる。Function When operating an electric blower configured as described above, even if there is some imbalance in the rotor or fan, the rotor remains suspended in the air due to the repulsion of the magnets, so the unbalance causes rotational vibration of the rotor shaft. is hardly transmitted to the bracket, and of course, as with conventional ball bearing links, there is a lot of vibration when the ball is scratched or dirt gets caught in the sliding surface of the ball, so it is possible to operate with very low vibration. is obtained.
ローターシャフトには、小形のボールベアリングが内蔵
されているため、回転起動時等の大きなローターへの偏
荷重に対して、磁気軸受が力負け６ ・＼
して、接触しても、ヌムーズに回転し、磁気軸受が破損
するよう々ことはない。The rotor shaft has a built-in small ball bearing, so the magnetic bearing loses force against a large unbalanced load on the rotor when starting rotation, etc. Even if it makes contact, it will not rotate smoothly. , there is no risk of damage to the magnetic bearing.
永久磁石は、その形状のまま、２コが同時に着磁され、
磁力が同心形状でかたよりなく着磁され、また同一の着
磁機で、通電方向をかえるだけで、使用される永久磁石
４コがすべて着磁できるため、品質、性能の安定化とと
もに、取り扱いが楽になシ、モーターへの組立２寸法精
度も容易に出すことができる。Two permanent magnets are magnetized at the same time while keeping their shape.
The magnetic force is uniformly magnetized with a concentric shape, and all four permanent magnets used can be magnetized by simply changing the current direction with the same magnetizing machine, resulting in stable quality and performance, as well as ease of handling. It is easy to assemble to the motor and can easily achieve two-dimensional accuracy.
実施例 以下、その実施例を図面を参照して説明する。Example Examples thereof will be described below with reference to the drawings.
第１図において、反負荷側ブラケット２１と負荷側（フ
ァン側）ブラケット２２の内部にロータ２３とヌテータ
−２４を内蔵し、反負荷側ブラケット２１の後方にはブ
ラシ２５を内蔵したブラシホルダー２６が固定されてい
る。ブラシ２５はローター２３の整流子２７に当接して
いる。ローター２３の負荷側シャフト２８にはファン２
９が固着され、その外側をケーシング３ｏが覆っている
。ケーシング３ｏの中央部にはファン２９の吸７ ′＼
裁目３１に対向して、開口３２が設けられ、反負荷側ブ
ラケット２１の後方には排気口３３が設けである。In FIG. 1, a rotor 23 and a nutator 24 are built inside the anti-load side bracket 21 and the load side (fan side) bracket 22, and a brush holder 26 containing a brush 25 is installed behind the anti-load side bracket 21. Fixed. The brush 25 is in contact with the commutator 27 of the rotor 23. A fan 2 is provided on the load side shaft 28 of the rotor 23.
9 is fixed, and a casing 3o covers the outside thereof. An opening 32 is provided in the center of the casing 3o, facing the suction 7'\cut 31 of the fan 29, and an exhaust port 33 is provided at the rear of the anti-load side bracket 21.
上記構成において、電動機を運転すると、ロタ−２３の
回転にともないファン２９もともに回転する。空気は開
口】３２よりファン２９の吸気口３１へ吸い込捷れ、フ
ァン２９の外周より負荷側プラケットの外周ケ通って電
動機内部へ至る。電動機内部で、ローター２３、ステー
ター２４、整流子２７、ブラシ２５を冷却して、排気口
３３より排出される。In the above configuration, when the electric motor is operated, the fan 29 also rotates as the rotor 23 rotates. Air is drawn into the intake port 31 of the fan 29 through the opening 32, passes from the outer periphery of the fan 29 to the outer periphery of the load side placket, and reaches the inside of the electric motor. The rotor 23, stator 24, commutator 27, and brushes 25 are cooled inside the electric motor and then discharged from the exhaust port 33.
第２図に、ローター２３の軸受部（負荷側３４゜反負荷
側３５）を記載し、その内容について説明する。負荷側
シャフト２８には小形のボールベアリング３６が圧入さ
れ、その外側を断面コの字状の円筒の永久磁石３７が固
着されている。その外側を覆って永久磁石３８が永久磁
石３７と空隙を保って負荷側ブラケット２２に固着され
ている。FIG. 2 shows the bearing portion of the rotor 23 (load side 34 degrees, anti-load side 35), and its contents will be explained. A small ball bearing 36 is press-fitted into the load-side shaft 28, and a cylindrical permanent magnet 37 having a U-shaped cross section is fixed to the outside thereof. A permanent magnet 38 is fixed to the load-side bracket 22 while maintaining an air gap with the permanent magnet 37 so as to cover the outside thereof.
永久磁石３７の着磁は、その内側をＮ極に、外側をＳ極
に着磁し、永久磁石３８を、この送に内側をＳＩＴに外
側をＮ極に着磁しである。また、磁石の中央部は円形の
開口部３７ａ、３８ａが設けである。The permanent magnet 37 is magnetized by magnetizing the inside to the north pole and the outside to the south pole, and the permanent magnet 38 is magnetized by magnetizing the inside to the SIT and the outside to the north pole. Furthermore, circular openings 37a and 38a are provided in the center of the magnet.
反負荷側軸受部３５は、上記負荷側軸受部３４と同一の
構成で、ローラー２３の反負荷側シャフト３９に小形の
ボールベアリング４ｏが圧入され、その外側に永久磁石
４１が固着され、その外側を覆って永久磁石４２が永久
磁石４１に空隙を保って反負荷側プラケット２１に固着
されている。永久磁石の着磁は、永久磁石４１はその内
側をＳ極に、外側をＮ極に着磁し、永久磁石４２はその
内側をＮ極に、外側をＳ極に着磁しである。そしてその
中央には円形の開口部４１ａ、４２ａが設けである。つ
まり負荷側軸受部３４と同一のボールベアリング、永久
磁石を用いている。The anti-load side bearing section 35 has the same configuration as the above-mentioned load side bearing section 34, and a small ball bearing 4o is press-fitted into the anti-load side shaft 39 of the roller 23, and a permanent magnet 41 is fixed to the outside of the ball bearing 4o. A permanent magnet 42 is fixed to the anti-load side placket 21 while maintaining a gap between the permanent magnet 41 and the permanent magnet 41 . The permanent magnets are magnetized in such a way that the inside of the permanent magnet 41 is magnetized to the S pole and the outside thereof is magnetized to the N pole, and the permanent magnet 42 is magnetized to the inside thereof to the N pole and the outside thereof to the S pole. In the center thereof, circular openings 41a and 42a are provided. In other words, the same ball bearing and permanent magnet as the load side bearing part 34 are used.
上記構成により、ローター２３は、永久磁石３７、。With the above configuration, the rotor 23 has permanent magnets 37.
４１の外側がＳ極で、それに覆う永久磁石３８゜４２の
内側がＳ極のため、反発し合い、空隙を保って空中に浮
く。このため、ローター２３の回転によりローター２３
、ファン２９のアンバランス９ ヘーノ
により、ローター２３のシャフト２８．３９が振動して
も、この振動は永久磁石３７．４１と３８゜４２の空隙
に吸収され、外側の永久磁石３８ 、４２には伝わらな
い。このため、電動送風機は非常に低振動となり、静か
な真空掃除機を得ることができる。The outside of 41 is the south pole, and the inside of the permanent magnet 38 degrees 42 that covers it is the south pole, so they repel each other and float in the air while maintaining an air gap. Therefore, due to the rotation of the rotor 23, the rotor 23
, unbalance of the fan 29 9 Even if the shaft 28.39 of the rotor 23 vibrates due to Heno, this vibration is absorbed by the gap between the permanent magnets 37.41 and 38°42, and the outer permanent magnets 38 and 42 It doesn't get across. Therefore, the electric blower has very low vibration, making it possible to obtain a quiet vacuum cleaner.
ローター２３の運転初期の起動時、あるいは−時的にロ
ーター２３に外部より貫性が加わった場合、磁石の反発
がこれらの力に負けて永久磁石３７．４１と３８．４２
が接触する場合があり、この時は、小形のボールベアリ
ング３６．４０が一時的に回転を引受け、ローター２３
の振動は外部へ伝わることになるが、回転そのものは支
障なく行われる。小形のボールベアリング３６．４０は
ほんの短時間の使用に耐えればよく、小形化ができるた
め、軸受部の構成は小さく形成できる。When the rotor 23 is started at the initial stage of operation, or when penetration is applied to the rotor 23 from the outside, the repulsion of the magnets is overcome by these forces and the permanent magnets 37.41 and 38.42
In this case, the small ball bearings 36 and 40 temporarily take over the rotation, and the rotor 23
The vibrations will be transmitted to the outside, but the rotation itself will occur without any problem. Since the small ball bearings 36, 40 only need to be used for a short time and can be made compact, the structure of the bearing portion can be made small.
永久磁石は小形化のためには強い磁力が必要とされ、サ
マリウム−コバルト磁石が適している。A permanent magnet requires strong magnetic force in order to be miniaturized, and samarium-cobalt magnets are suitable.
磁石の空隙は振動の防止と、反発力より０．１ｒＭｌ〜
Ｑ、４ｍｍ 程度に設定される。着磁は上記説明では
、１０ ｌ＼−／
負荷側の永久磁石をＮ極で反発させ、反負荷側の永久磁
石をＳ極で反発させたが、これを逆にしても同様の効果
を得ることができる。The air gap of the magnet is used to prevent vibration and reduce repulsive force by 0.1rMl~
Q. It is set to about 4mm. In the above explanation, the magnetization is 10 l\-/ The permanent magnet on the load side is repelled by the N pole, and the permanent magnet on the anti-load side is repelled by the S pole, but the same effect can be obtained even if this is reversed. be able to.
永久磁石３了、３８，４１ ．４２はその中央に開口部
３アａ 、３８ａ 、４１ ａ 、４２ａが設けである
ため、磁石−より出た磁束は第３図のようになる。つま
シ、磁石の中央を通る磁束Ｂと、磁石の外側を通る磁束
Ｃが出来る。中央に開口がないと、磁束Ｂは形成されず
、磁石中央部の磁束は磁束Ｃと同じように、磁束Ｃの外
側を通って形成されるため、磁気通路が長くなり磁石の
反発力が低下するが、本発明は中央に開口を設けたため
に、磁気通路が短かく形成され、反発力が強い。さらに
ローター２３はその負荷側外面がＮ極、反負荷側外面が
Ｓ極となり、シャフト（２８，３９）はローターを貫通
しているため、永久磁石３７と永久磁石４１はシャフト
（鉄製）を通じて磁気結合し、磁力が強まる。このため
磁気反発力は強くなり、より確実な磁気軸受が得られる
。Permanent magnet 3rd, 38, 41. 42 is provided with openings 3a, 38a, 41a, and 42a at its center, so the magnetic flux coming out of the magnet becomes as shown in FIG. A magnetic flux B passes through the center of the magnet, and a magnetic flux C passes through the outside of the magnet. If there is no opening in the center, magnetic flux B will not be formed, and the magnetic flux at the center of the magnet will pass through the outside of magnetic flux C, just like magnetic flux C, so the magnetic path will become longer and the repulsive force of the magnet will decrease. However, in the present invention, since the opening is provided in the center, the magnetic path is short and the repulsive force is strong. Furthermore, the outer surface of the rotor 23 on the load side is the N pole, and the outer surface of the non-load side is the S pole, and since the shafts (28, 39) pass through the rotor, the permanent magnets 37 and 41 are magnetically connected through the shaft (made of iron). They combine and the magnetic force becomes stronger. Therefore, the magnetic repulsive force becomes stronger, and a more reliable magnetic bearing can be obtained.
第４図で、軸受に使用する永久磁石の着磁機に１１ ヘ
ーノ
ついて説明する。断面Ｅ字状の環状ヨーク４３の中央に
着磁コイ／Ｌ’４４が巻いてあシ、ヨーク４３の中火ボ
ヌ４５は永久磁石３７．４１の内径に合わせである。こ
の永久磁石３７．４１の外側へ磁性材料（鉄）よりなる
ギャップ４６を被せ、さらにその外側へ永久磁石４２．
３８を置き、その上にヨーク４７が置かれる、ヨーク４
７はヨーク４３に対向し、その中央は永久磁石４２．３
８の外径に合わせである。Referring to FIG. 4, an explanation will be given of a magnetizing machine for permanent magnets used in bearings. A magnetized coil/L'44 is wound around the center of an annular yoke 43 having an E-shaped cross section, and a medium-heating bolt 45 of the yoke 43 is matched to the inner diameter of the permanent magnet 37.41. A gap 46 made of magnetic material (iron) is placed on the outside of this permanent magnet 37.41, and a permanent magnet 42.
38 and a yoke 47 is placed on top of it, the yoke 4
7 faces the yoke 43, the center of which is a permanent magnet 42.3
It is matched to the outer diameter of 8.
上記構成により、ヨーク４３の中央ボス４５に永久磁石
３７、キャップ４６、永久磁石４２、ヨーク４７を置い
て、着磁コイ）ｖ４４に通電すると、磁束は中央ボヌ４
５から、永久磁石３７の内から外へ、キャップ４６を通
って永久磁石４２の内から外へ、そしてヨーク４７を通
ってヨーク４３へと形成され、永久磁石３７と、永久磁
石４２はその内面がＳｉに、外面がＮ極にほぼ均一に着
磁される。With the above configuration, when the permanent magnet 37, the cap 46, the permanent magnet 42, and the yoke 47 are placed on the central boss 45 of the yoke 43 and the magnetized coil (v44) is energized, the magnetic flux is transferred to the central boss 45 of the yoke 43.
5, from the inside to the outside of the permanent magnet 37, from the inside to the outside of the permanent magnet 42 through the cap 46, and through the yoke 47 to the yoke 43, and the permanent magnet 37 and the permanent magnet 42 are formed on the inner surface thereof. is Si, and the outer surface is almost uniformly magnetized to the N pole.
次に永久磁石３８と４１の着磁について説明する。ｊｊ
’Ｊ ＩｊＥの渚磁方式と同じく、永久磁石３７にかえ
て３８を４２にかえて４１を置き、着磁コイルの電流の
向きを逆にすると、永久磁石３８と４１は、その内面が
Ｎ極に、外面がＳ極に、ヌラスト方向、ラジアル方向と
もほぼ均一に着磁される。Next, the magnetization of the permanent magnets 38 and 41 will be explained. jj
'J IjE's Nagisa magnetic method, if you replace permanent magnet 37 with 42 and replace permanent magnet 38 with 41, and reverse the direction of the current in the magnetizing coil, the inner surfaces of permanent magnets 38 and 41 will be N poles. In addition, the outer surface is magnetized almost uniformly in both the null direction and the radial direction with the S pole.
このように１回の着磁で２コの磁石をスラスト。In this way, two magnets are thrust with one magnetization.
ラジアル方向とも一体で着磁でき、着磁時間を短縮する
ことができる。また着磁機も共用で使用でき、通電方向
をかえるだけで、ローター側、プラケット側すべて（４
コ）の磁石を着磁することができる。It can be magnetized in both the radial direction and the magnetization time can be shortened. In addition, the magnetizing machine can be used in common, and by simply changing the direction of energization, both the rotor side and placket side (4
It is possible to magnetize the magnet of (e).
発明の効果
本発明は、以上説明したように構成されており、以下に
記載されるような効果を奏する。Effects of the Invention The present invention is configured as described above, and produces the effects described below.
ローターの軸受を小形のボールベアリングと、中央に開
口を設けた断面コの字状の永久磁石を用いた磁気軸受で
構成したため、通常運転時は振動を非常に小さくでき、
静かな真空掃除機が得られ、また、起動時等のローグー
に大きな負荷がかかる時は、ボールベアリングにより一
時的に回転を弓受けるため、軸受の信頼性は大きく向上
し、永久１３へ
磁石の磁力はさほど強くなくても良いため、全体に小形
に形成できる。さらに、永久磁石の構成を負荷側の反発
磁力（Ｎ極）と反負荷側の反発力（Ｓ極）を異極で行っ
ているため、ローターのシャフトを通じてローターの負
荷側と反負荷側の磁石が磁気結合して力が強くなり、よ
り信頼性の高い磁気軸受が得られる。The rotor bearing is composed of a small ball bearing and a magnetic bearing using a permanent magnet with a U-shaped cross section with an opening in the center, so vibrations can be kept very low during normal operation.
A quiet vacuum cleaner can be obtained, and when a large load is applied to the Rogue, such as when starting up, the rotation is temporarily supported by the ball bearing, which greatly improves the reliability of the bearing, and the magnet is permanently attached to the 13. Since the magnetic force does not need to be very strong, the entire structure can be made compact. Furthermore, since the permanent magnets are configured so that the repulsive magnetic force (N pole) on the load side and the repulsive force (S pole) on the anti-load side are different polarities, the magnets on the load side and anti-load side of the rotor can be connected to each other through the shaft of the rotor. are magnetically coupled and the force becomes stronger, resulting in a more reliable magnetic bearing.
また永久磁石の着磁を、同一の着磁機で、２コづつ同時
に一体的に（ヌラスト方向、ラジアル方向とも）着磁で
きるため、低コストで信頼性の高い磁気軸受用永久磁石
を得ることができる。In addition, since two permanent magnets can be magnetized simultaneously (both in the null direction and in the radial direction) using the same magnetizing machine, it is possible to obtain permanent magnets for magnetic bearings that are low in cost and highly reliable. I can do it.
第１図は本発明の実施例を示す真空掃除機用電動送風機
の断面図、第２図は同軸受部の部分断面図、第３図は同
永久磁石の断面図、第４図は同永久磁石の着磁機を示す
断面図、第５図は従来例を示す電動送風機の部分ｌ新面
図である。
２３・・・・・・ローター、２４・・・・・・ステータ
ー、３４・・・・負荷側軸受部、３６・・・・・・反負
荷側軸受部、３６・・・ボールベアリング、３７，３８
，４１ ．４２１４へ一／
・・・・・・永久磁石、４３・・・・・・ヨーク、４４
・・・・・・着磁コイ ル。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第
図
３’／、３Ｂ、４１．４２−−一承ス
４３．４７−−・ヨ
４４−・−着磁
４５− 中央
４Ａ−キ〒
第
図Fig. 1 is a sectional view of an electric blower for a vacuum cleaner showing an embodiment of the present invention, Fig. 2 is a partial sectional view of the same bearing part, Fig. 3 is a sectional view of the permanent magnet, and Fig. 4 is a sectional view of the same permanent magnet. FIG. 5 is a sectional view showing a magnetizing machine for magnets, and FIG. 5 is a new view of a portion of an electric blower showing a conventional example. 23...Rotor, 24...Stator, 34...Load side bearing section, 36...Counter load side bearing section, 36...Ball bearing, 37, 38
,41. To 4214/...Permanent magnet, 43...Yoke, 44
・・・・・・Magnetizing coil. Name of agent: Patent attorney Toshio Nakao and one other person Figure 3'/, 3B, 41.42--Ichisho 43.47--Yo 44--Magnetization 45-Central 4A-Ki No. figure
Claims (2)
のローターの両端に、ころがり軸受と、その外側に断面
コの字状で円筒形状，中央部に開口を有した永久磁石を
固着、その外側に上記永久磁石と同形状で、該永久磁石
より１回り大きく、かつ該永久磁石より外周、スラスト
方向とも隙間を設けた永久磁石をモータブラケット側に
それぞれ設け、永久磁石の着磁はその内面と外面を異極
とし、ローター側とモーターブラケット側の極を逆にす
るとともに、ローターの負荷側と反負荷側とも逆極に着
磁してなる電動送風機の軸受装置。(1) A suction fan is installed on one side of the electric motor, and a rolling bearing is attached to both ends of the rotor of the electric motor, and a permanent magnet with a cylindrical U-shaped cross section and an opening in the center is fixed to the outside of the bearing. A permanent magnet having the same shape as the above permanent magnet, one size larger than the permanent magnet, and having a gap from the permanent magnet in both the outer periphery and the thrust direction is provided on the motor bracket side, and the magnetization of the permanent magnet is made with the inner surface of the permanent magnet. A bearing device for an electric blower that has different polarities on its outer surfaces, reverses the polarity on the rotor side and motor bracket side, and magnetizes the load side and anti-load side of the rotor with opposite polarities.
を巻き、中央ボスの径は、ローター側永久磁石の内径に
合わせ、この永久磁石の外側に磁性体よりなるキャップ
を介して、その外側へブラケット側永久磁石を被せ、さ
らにその外側へ該永久磁石の外周を覆いＥ字形状ヨーク
の蓋をする第２のヨークを被せ、着磁コイルに通電する
。次に別の永久磁石にて、着磁コイルの通電方向を逆に
して、前記永久磁石とは逆極性の永久磁石を着磁してな
る電動送風機の軸受装置に用いる永久磁石の着磁方法。(2) A magnetizing coil is wound around the center boss of an annular yoke with an E-shaped cross section, the diameter of the center boss is matched to the inner diameter of the rotor side permanent magnet, and a cap made of a magnetic material is placed on the outside of this permanent magnet. A bracket-side permanent magnet is placed on the outside, and a second yoke that covers the outer periphery of the permanent magnet and covers the E-shaped yoke is placed on the outside, and the magnetizing coil is energized. A method of magnetizing a permanent magnet for use in a bearing device of an electric blower, in which the direction of energization of the magnetizing coil is then reversed using another permanent magnet to magnetize a permanent magnet with a polarity opposite to that of the permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63161584A JPH0211896A (en) | 1988-06-29 | 1988-06-29 | Bearing device for electric blower and magnetizing method for permanent magnet used in this bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63161584A JPH0211896A (en) | 1988-06-29 | 1988-06-29 | Bearing device for electric blower and magnetizing method for permanent magnet used in this bearing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0211896A true JPH0211896A (en) | 1990-01-16 |
Family
ID=15737904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63161584A Pending JPH0211896A (en) | 1988-06-29 | 1988-06-29 | Bearing device for electric blower and magnetizing method for permanent magnet used in this bearing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0211896A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006329351A (en) * | 2005-05-27 | 2006-12-07 | Sony Corp | Magnetic bearing and fan motor using it |
| KR20160149228A (en) * | 2014-05-06 | 2016-12-27 | 성-리엔 린 | Motor |
-
1988
- 1988-06-29 JP JP63161584A patent/JPH0211896A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006329351A (en) * | 2005-05-27 | 2006-12-07 | Sony Corp | Magnetic bearing and fan motor using it |
| KR20160149228A (en) * | 2014-05-06 | 2016-12-27 | 성-리엔 린 | Motor |
| JP2017515448A (en) * | 2014-05-06 | 2017-06-08 | 林聖梁Lin, Sheng−Lian | motor |
| EP3142227A4 (en) * | 2014-05-06 | 2018-01-24 | Lin, Sheng-Lian | Motor |
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