JP2001304165A - Magnetic coupling pump - Google Patents
Magnetic coupling pumpInfo
- Publication number
- JP2001304165A JP2001304165A JP2000123932A JP2000123932A JP2001304165A JP 2001304165 A JP2001304165 A JP 2001304165A JP 2000123932 A JP2000123932 A JP 2000123932A JP 2000123932 A JP2000123932 A JP 2000123932A JP 2001304165 A JP2001304165 A JP 2001304165A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- magnetic coupling
- partition
- pump
- cylindrical 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.)
- Granted
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、自動車の冷却系統
等に用いられるウオータポンプ等に、好適に使用される
モータ駆動式の磁気結合ポンプに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor-driven magnetic coupling pump suitably used for a water pump or the like used for a cooling system of an automobile.
【０００２】[0002]
【従来の技術】この種の磁気結合ポンプとして、従来、
ハウジング内にカップ形の隔壁部を介してポンプ室と環
状のモータ室が区画・形成され、モータ室内にモータの
ステータが環状に配設されると共に、ポンプ室の中心位
置に固定軸が取り付けれ、その固定軸に軸受部を介して
ロータが回転自在に支持され、ロータにはステータの複
数の磁極に対応して複数の永久磁石が環状に配置される
と共に、羽根車がロータの先端側に設けられた構造のポ
ンプ装置が知られている（例えば、特開平１０−９１８
５号公報参照）。2. Description of the Related Art Conventionally, as this kind of magnetic coupling pump,
A pump chamber and an annular motor chamber are defined and formed in the housing via a cup-shaped partition wall, a stator of the motor is annularly disposed in the motor chamber, and a fixed shaft is attached to a center position of the pump chamber. The rotor is rotatably supported on the fixed shaft via a bearing portion, and a plurality of permanent magnets are annularly arranged on the rotor corresponding to a plurality of magnetic poles of the stator, and an impeller is provided on the tip side of the rotor. A pump device having a known structure is known (for example, see JP-A-10-918).
No. 5).
【０００３】この種の従来のポンプ装置は、固定軸がそ
の末端をモータ室の隔壁部に埋設するように取り付けら
れ、ロータと一体に形成された羽根車が固定軸の自由端
側に回転自在に支持され、ロータを片持ち式で支持する
構造のため、ロータの回転時に、軸の振れや軸受部の僅
かな隙間に起因して、ロータが軸を中心として傾斜する
ような揺動運動が発生し易い。このため、ロータが回転
時に揺動運動を起した場合でも、ロータと隔壁部が接触
しないように、ロータと隔壁部の隙間を大きくする必要
があった。In this type of conventional pump device, a fixed shaft is mounted so that its end is embedded in a partition wall of a motor chamber, and an impeller integrally formed with a rotor is rotatable toward a free end of the fixed shaft. And the rotor is supported in a cantilevered manner, so that when the rotor rotates, a swinging motion in which the rotor tilts around the shaft is caused by shaft runout and a slight gap in the bearing. Easy to occur. Therefore, it is necessary to increase the gap between the rotor and the partition so that the rotor does not come into contact with the partition even when the rotor swings during rotation.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、モータ
は、ステータの複数の磁極のステータコイルに励磁電流
を供給して回転磁界を発生させ、これによって、隔壁部
を介して位置するロータの永久磁石との間に磁気吸引力
を作用させ、永久磁石と羽根車付きのロータを回転駆動
するように動作するため、ロータと隔壁部の隙間（エア
ーギャップ）が大きくなると、モータの駆動トルクが低
下する問題があった。However, the motor supplies an exciting current to the stator coils of the plurality of magnetic poles of the stator to generate a rotating magnetic field, thereby generating a rotating magnetic field. A magnetic attraction force acts between the rotor and the rotor to rotate the permanent magnet and the impeller, so that if the gap (air gap) between the rotor and the partition wall becomes large, the driving torque of the motor decreases. was there.
【０００５】本発明は、上記の点に鑑みてなされたもの
で、ロータと隔壁部間の接触を回避すると共に、ロータ
と隔壁部間の隙間を最小として、良好な駆動トルクを確
保することができる磁気結合ポンプを提供することを目
的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to avoid a contact between a rotor and a partition, minimize a gap between the rotor and the partition, and secure a good driving torque. It is an object of the present invention to provide a magnetic coupling pump which can be used.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明の請求項１の磁気結合ポンプは、隔壁部を介
してポンプ室とモータ室を内側に設けたハウジングと、
ポンプ室内に配設され片持ち式の固定軸上に回転自在に
支持されるロータと、ロータ上に一体的に設けられた羽
根車と、ロータの円筒部に配設された永久磁石部と、モ
ータ室内に配設され円筒部の永久磁石部に隔壁部を介し
て対向して配設されたステータと、を備えてなる磁気結
合ポンプにおいて、ロータと隔壁部との接触を回避する
ために、ロータの円筒部における隔壁部側の端部側角部
にテーパ部が、部分を断面楔状に円周方向に連続して切
り欠くことにより形成されていることを特徴とする。According to a first aspect of the present invention, there is provided a magnetic coupling pump having a housing provided with a pump chamber and a motor chamber inside through a partition,
A rotor disposed in the pump chamber and rotatably supported on a cantilevered fixed shaft, an impeller integrally provided on the rotor, and a permanent magnet portion disposed on a cylindrical portion of the rotor; In a magnetic coupling pump comprising a stator disposed in the motor chamber and disposed opposite the permanent magnet portion of the cylindrical portion via the partition portion, in order to avoid contact between the rotor and the partition portion, A tapered portion is formed at a corner of the end of the cylindrical portion of the rotor on the partition wall side by continuously cutting the portion in a circumferential direction in a wedge-shaped cross section.
【０００７】また、請求項２の磁気結合ポンプは、請求
項１のものにおいて、永久磁石部を設けたロータの円筒
部が隔壁部を介してステータの外側に配設されるアウタ
ーロータ形の磁気結合ポンプであって、円筒部の内周面
の先端側角部を、断面楔状に円周方向に連続して切り欠
いて、テーパ部が形成される。According to a second aspect of the present invention, there is provided a magnetic coupling pump according to the first aspect, wherein the cylindrical portion of the rotor provided with the permanent magnet portion is disposed outside the stator via a partition portion. In the coupling pump, a taper portion is formed by continuously cutting a corner portion on a distal end side of an inner peripheral surface of a cylindrical portion in a circumferential direction in a wedge shape in cross section.
【０００８】また、請求項３の磁気結合ポンプは、請求
項１のものにおいて、ステータが外側に配置され、隔壁
部を介してその内側のロータの円筒部が配設されるイン
ナーロータ形の磁気結合ポンプであって、ロータの隔壁
部に近い円筒部の外周面の端部側角部を、断面楔状に円
周方向に連続して切り欠いて、テーパ部が形成される。According to a third aspect of the present invention, there is provided a magnetic coupling pump according to the first aspect, wherein the stator is disposed on the outside, and the cylindrical portion of the inner rotor is disposed via the partition wall. In the coupling pump, a tapered portion is formed by continuously cutting a corner portion on an end portion of an outer peripheral surface of a cylindrical portion close to a partition wall portion of a rotor in a circumferential direction in a wedge-shaped cross section.
【０００９】[0009]
【作用】このような構成の磁気結合ポンプは、ステータ
に通電して回転磁界を発生させると、ロータの永久磁石
部がこの回転磁界に追従して回転することでロータ上の
羽根車が回転し、この羽根車の回転により流体が吸込口
からポンプ室内に吸い込まれ、吐出口から吐き出され
る。In the magnetic coupling pump having such a configuration, when a rotating magnetic field is generated by energizing the stator, the impeller on the rotor is rotated by rotating the permanent magnet portion of the rotor following the rotating magnetic field. Fluid is sucked into the pump chamber from the suction port by the rotation of the impeller, and is discharged from the discharge port.
【００１０】この磁気結合ポンプでは、その回転駆動
時、ロータ７が片持ち式の固定軸に回転自在に支持され
ることから、固定軸の僅かな揺動や固定軸と軸受部の僅
かな隙間に起因して、ロータが固定軸に対し傾斜するよ
うに揺動運動して、ロータの円筒部の端部側角部が、隔
壁部に接近して接触する恐れが生じる。In this magnetically coupled pump, the rotor 7 is rotatably supported by the cantilevered fixed shaft during its rotation, so that the fixed shaft slightly swings and the clearance between the fixed shaft and the bearing portion is small. As a result, the rotor swings so as to be inclined with respect to the fixed shaft, and there is a possibility that the end side corner of the cylindrical portion of the rotor approaches and comes into contact with the partition.
【００１１】しかしながら、ロータの円筒部の端部側角
部を、断面楔状に円周方向に連続して切り欠いて、そこ
にテーパ部を形成しているから、ロータがその軸を傾斜
する方向に揺動しても、円筒部の端部側角部と隔壁部と
の接触を回避することができる。このため、ロータの永
久磁石部を設けた円筒部と隔壁部の隙間（エアーギャッ
プ）は、最小に狭く設定することができ、これによっ
て、モータの駆動トルクを良好に確保し、効率の高い磁
気結合ポンプとすることができる。However, since the end side corner portion of the cylindrical portion of the rotor is continuously cut in the circumferential direction in a wedge shape in section, and the tapered portion is formed there, the direction in which the rotor tilts its axis is formed. , The contact between the corner on the end side of the cylindrical portion and the partition wall can be avoided. For this reason, the gap (air gap) between the cylindrical portion on which the permanent magnet portion of the rotor is provided and the partition portion can be set to be as small as possible. It can be a combined pump.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。図１は磁気結合ポンプの断面図を
示している。この磁気結合ポンプは、ポンプ室５を有す
るポンプハウジング１とモータ室を有するモータハウジ
ング２を備え、ポンプハウジング１には、流体の吸込口
１ａと吐出口１ｂが設けられる。ポンプハウジング１と
モータハウジング２によって形成される内部空間は、隔
壁部４より仕切られ、ポンプ室５とモータ室６が分離・
形成され、ポンプ室５は吸込口１ａと吐出口１ｂに連通
する。また、この磁気結合ポンプは、モータステータの
外周部にロータ７を配置したアウターロータ形に構成さ
れる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a sectional view of a magnetic coupling pump. The magnetic coupling pump includes a pump housing 1 having a pump chamber 5 and a motor housing 2 having a motor chamber. The pump housing 1 is provided with a fluid suction port 1a and a discharge port 1b. The internal space formed by the pump housing 1 and the motor housing 2 is partitioned by a partition wall 4, and the pump chamber 5 and the motor chamber 6 are separated from each other.
The pump chamber 5 is formed and communicates with the suction port 1a and the discharge port 1b. Further, this magnetic coupling pump is configured as an outer rotor type in which a rotor 7 is arranged on an outer peripheral portion of a motor stator.
【００１３】モータ室６は円柱状空間として形成され、
ポンプ室５はその円柱状空間のモータ室６の端部と外周
部を覆う容器状空間として形成される。モータハウジン
グ２の一部を形成する隔壁部４はカップ状に形成され、
そのカップ状の隔壁部４の中心軸上位置に、軸支部１４
がモータ室６側に突設される。軸支部１４には、固定軸
８がポンプ室５側からその元部を挿入する形態で埋設・
固定され、固定軸８の上部はポンプ室５側の中心軸位置
に突出する。固定軸８の元部には抜け止め用の螺旋部８
ａが形成され、その先端部にはねじ孔８ｂが軸方向に穿
設される。The motor chamber 6 is formed as a cylindrical space,
The pump chamber 5 is formed as a container-like space that covers an end portion and an outer peripheral portion of the motor chamber 6 in the cylindrical space. The partition part 4 forming a part of the motor housing 2 is formed in a cup shape,
A shaft support 14 is provided at a position on the center axis of the cup-shaped partition 4.
Are protruded from the motor chamber 6 side. The fixed shaft 8 is buried in the shaft support portion 14 in such a manner that its original portion is inserted from the pump chamber 5 side.
It is fixed, and the upper part of the fixed shaft 8 protrudes to the center axis position on the pump chamber 5 side. At the base of the fixed shaft 8 is a spiral portion 8 for retaining
a is formed, and a screw hole 8b is drilled at the tip end thereof in the axial direction.
【００１４】羽根車１０付きのロータ７が、ポンプ室５
の容器状空間内に、その中央部に設けた軸受部９を、固
定軸８の先端部に回転自在に嵌入して配設される。ロー
タ７は略カップ状に形成され、その円筒部７ａが、ポン
プ室５の末端つまり隔壁部４寄りに形成された円筒空間
部５ａ内に挿入される。羽根車１０は、カップ形のロー
タ７の円形底部上に一体的に形成され、複数の羽根１０
ａが同一円周上に等間隔で設けられる。The rotor 7 with the impeller 10 is
The bearing 9 provided at the center thereof is rotatably fitted to the distal end of the fixed shaft 8 in the container-like space. The rotor 7 is formed in a substantially cup shape, and the cylindrical portion 7a is inserted into a cylindrical space 5a formed at the end of the pump chamber 5, that is, near the partition 4. The impeller 10 is integrally formed on the circular bottom of the cup-shaped rotor 7 and has a plurality of blades 10.
a are provided at equal intervals on the same circumference.
【００１５】具体的には、この羽根車１０付きのロータ
７は、磁性粉末を混合したポリアミド樹脂等により一体
形成され、ＰＰＳ樹脂で別個に成形した軸受部９が成形
時にその中央部にインサートとして埋設される。そし
て、成形後に、そのロータ７の円筒部７ａの所定箇所に
磁束を通すことにより、複数の永久磁石部７ｂがその内
部に着磁・形成される。各永久磁石部７ｂは、ロータ７
の円筒部７ａ内の軸方向に、後述のモータ室５内のステ
ータ１５の磁極に対向して形成され、且つ各磁極に対応
した角度間隔で、複数個形成される。More specifically, the rotor 7 with the impeller 10 is integrally formed of a polyamide resin or the like mixed with a magnetic powder, and a bearing 9 separately molded of PPS resin is used as an insert at the center of the bearing during molding. Buried. Then, after molding, a plurality of permanent magnet portions 7b are magnetized and formed inside by passing a magnetic flux through a predetermined portion of the cylindrical portion 7a of the rotor 7. Each of the permanent magnet portions 7b includes a rotor 7
Are formed in the cylindrical portion 7a in the axial direction so as to face magnetic poles of the stator 15 in the motor chamber 5 described later, and a plurality of the magnetic poles are formed at angular intervals corresponding to the magnetic poles.
【００１６】さらに、羽根車１０付きのロータ７は、そ
の円筒部７ａをポンプ室５の隔壁部４側の円筒空間部５
ａ内に挿入するように配設され、その中央の軸受部９を
固定軸８に外嵌・挿入し、固定軸８先端のねじ孔８ｂ
に、ワッシャ１２を介して固定ねじ１３をねじ込み、ロ
ータ７が回転自在に取り付けられる。Further, the rotor 7 with the impeller 10 has a cylindrical portion 7a formed in the cylindrical space 5 on the partition wall 4 side of the pump chamber 5.
a, and a central bearing portion 9 is externally fitted and inserted into the fixed shaft 8, and a screw hole 8 b at the tip of the fixed shaft 8 is provided.
Then, the fixing screw 13 is screwed through the washer 12 so that the rotor 7 is rotatably mounted.
【００１７】ところで、このロータ７の特徴的構成とし
て、その円筒部７ａの先端側の内周面にテーパ部７ｃが
形成される点がある。このテーパ部７ｃは、円筒部７ａ
の内周面の先端側角部を、断面楔状に円周方向に連続し
て切り欠くことにより、形成される。テーパ部７ｃは、
ロータ７が固定軸８に対し傾斜するように揺動運動し
て、その円筒部７ａが揺動した際、隔壁部４との接触を
回避するために、設けられる。このテーパ部７ｃの幅ｗ
は、図３に示すように、４mm〜６mmが適当であり、望ま
しくは、４．５mm〜５．５mmとする。また、テーパ部７
ｃの内周面に対する角度αは、０．５°〜３．０°が適
当であり、望ましくは、１．０°〜２．０°とすると良
い。なお、図１〜図３の角度αは、説明を分かり易くす
るために誇張して示してある。Incidentally, a characteristic configuration of the rotor 7 is that a tapered portion 7c is formed on the inner peripheral surface on the distal end side of the cylindrical portion 7a. The tapered portion 7c is provided with a cylindrical portion 7a.
Is formed by continuously notching a corner portion on the distal end side of the inner peripheral surface in a circumferential direction in a wedge shape in section. The tapered portion 7c
It is provided to avoid contact with the partition wall portion 4 when the rotor 7 swings so as to be inclined with respect to the fixed shaft 8 and the cylindrical portion 7a swings. The width w of the tapered portion 7c
As shown in FIG. 3, 4 mm to 6 mm is appropriate, and preferably, 4.5 mm to 5.5 mm. Also, the tapered portion 7
The angle α of c with respect to the inner peripheral surface is suitably from 0.5 ° to 3.0 °, and preferably from 1.0 ° to 2.0 °. Note that the angle α in FIGS. 1 to 3 is exaggerated for easy understanding.
【００１８】上記のように、固定軸８はその元部のみを
固定して片持ち式に取り付けられると共に、カップ状の
ロータ７がその底部の中央に軸受部９を設けて片持ち式
に支持されるため、固定軸８の僅かな触れや軸受部９と
固定軸８間の僅かな隙間に起因して、ロータ７がその中
心軸を傾斜する方向に揺動し易い。ロータ７の円筒部７
ａの内周面と隔壁部４の隙間が狭い場合、この揺動時に
は、図２に示すように、円筒部７ａの内周面の先端側角
部が、その内側の隔壁部４に接近して接触し易いが、こ
の円筒部７ａの内周面の先端側角部を、断面楔状に円周
方向に連続して切り欠いて、そこにテーパ部７ｃを形成
することにより、円筒部７ａの内周面と隔壁部４の隙間
が狭い場合でも、揺動時の接触を防止することができ
る。従って、円筒部７ａの内周面と隔壁部４の隙間（エ
アーギャップ）は、最小に狭く設定することができる。As described above, the fixed shaft 8 is fixed only at its base and is cantilevered, and the cup-shaped rotor 7 is provided with a bearing 9 at the center of its bottom to support it in a cantilevered manner. Therefore, the rotor 7 easily swings in a direction inclining its central axis due to slight contact of the fixed shaft 8 or a small gap between the bearing 9 and the fixed shaft 8. Cylindrical part 7 of rotor 7
In the case where the gap between the inner peripheral surface of the cylindrical portion 7a and the partition wall portion 4 is narrow, as shown in FIG. 2, the distal end side corner of the inner peripheral surface of the cylindrical portion 7a approaches the partition wall portion 4 inside the cylindrical portion 7a. Although it is easy to come into contact with the cylindrical portion 7a, the distal end corner of the inner peripheral surface of the cylindrical portion 7a is continuously cut in the circumferential direction in a wedge-shaped cross section, and a tapered portion 7c is formed there. Even when the gap between the inner peripheral surface and the partition part 4 is narrow, it is possible to prevent the contact at the time of swinging. Therefore, the gap (air gap) between the inner peripheral surface of the cylindrical portion 7a and the partition portion 4 can be set to a minimum value.
【００１９】一方、モータ室６には羽根車１０付きのロ
ータ７を回転させるモータのステータ１５が配設され
る。ステータ１５の磁極は、隔壁部４の内側のモータ室
６の中央の軸支部１４を取り巻くように円周上に等間隔
で配置され、複数のステータコア１６と、その外周のボ
ビンに巻装されたステータコイル１７とを有して構成さ
れる。ステータ１５の各磁極は、隔壁部４を介して、ロ
ータ７の円筒部７ａの永久磁石部７ｂに対向して位置す
る。１８はステータコイル１７から回路基板１９側に出
された端子部である。On the other hand, the motor chamber 6 is provided with a motor stator 15 for rotating the rotor 7 with the impeller 10. The magnetic poles of the stator 15 are arranged at equal intervals on the circumference so as to surround the central shaft support 14 of the motor chamber 6 inside the partition wall 4, and are wound around a plurality of stator cores 16 and a bobbin on the outer periphery thereof. And a stator coil 17. Each magnetic pole of the stator 15 is located opposite the permanent magnet portion 7b of the cylindrical portion 7a of the rotor 7 with the partition wall 4 interposed therebetween. Reference numeral 18 denotes a terminal portion that extends from the stator coil 17 to the circuit board 19 side.
【００２０】上記モータ室６内の軸支部１４の先端部に
は、回路基板１９を支持するための支持用リブ１４ａが
形成され、その支持用リブ１４ａ上の中央に棒状のボス
部１４ｂが突設される。１枚の回路基板１９が、その一
部に設けた孔をこのボス部１４ｂに挿入し、端子部１８
を嵌挿させると共に、コネクタ部２０との接続用の端子
部２３を嵌挿させた状態で、モータハウジング２から突
設した支持部２２上と支持用リブ１４ａ上にその裏面を
当接させて、モータ室６内に取り付けられる。回路基板
１９上には、図示は省略されているが、各ステータコイ
ル１７に制御された電流を適切なタイミングで供給する
ためのパワートランジスタなどを用いた制御回路が実装
される。A support rib 14a for supporting the circuit board 19 is formed at the tip of the shaft support 14 in the motor chamber 6, and a rod-shaped boss 14b projects at the center on the support rib 14a. Is established. One circuit board 19 inserts a hole provided in a part thereof into the boss portion 14b, and
With the terminal 23 for connection with the connector section 20 fitted therein, the back surfaces thereof are brought into contact with the support portions 22 projecting from the motor housing 2 and the support ribs 14a. , Mounted in the motor chamber 6. Although not shown, a control circuit using a power transistor or the like for supplying a controlled current to each stator coil 17 at an appropriate timing is mounted on the circuit board 19.
【００２１】上記構成の磁気結合ポンプは、その製造
時、例えばポリアミド樹脂で成形されたポンプハウジン
グ１を、そのポンプ室５内にロータ７を配設し軸支した
状態で、同じポリアミド樹脂製のモータハウジング２に
合わせて溶着により接合・固定し、さらに、モータ室６
内にステータ１５を挿入し、所定位置に回路基板１９等
を装着した状態で、流動性固化用樹脂をモータ室６内に
充填し、モータ室内のステータ１５と回路基板１９を固
化させる。そして、モータハウジング２の開口部に、ポ
リアミド樹脂等で板状に成形されたカバー体３を、溶着
してそこを閉鎖する。なお、回路基板１９は、ステータ
コイル１７から出されている端子部１８及び接続用端子
部２３とを半田付けした後、モータ室６内に挿入される
ステータ１５と一緒に組み付けてもよい。When the magnetic coupling pump having the above-described structure is manufactured, the pump housing 1 formed of, for example, a polyamide resin is made of the same polyamide resin in a state where the rotor 7 is arranged and supported in the pump chamber 5. It is joined and fixed by welding in accordance with the motor housing 2, and
With the stator 15 inserted therein, the circuit board 19 and the like mounted at predetermined positions, the fluid chamber solidifying resin is filled into the motor chamber 6 to solidify the stator 15 and the circuit board 19 in the motor chamber. Then, a cover body 3 formed into a plate shape with a polyamide resin or the like is welded to the opening of the motor housing 2 and closed. The circuit board 19 may be assembled together with the stator 15 inserted into the motor chamber 6 after soldering the terminal 18 and the connection terminal 23 extending from the stator coil 17.
【００２２】次に、上記構成の磁気結合ポンプの動作を
説明する。ステータ１５の各磁極のステータコイル１７
に通電して回転磁界を発生させると、ロータ７の円筒部
７ａの永久磁石部７ｂがこの回転磁界に追従して回転す
ることで、羽根車１０付きのロータ７が回転する。ポン
プ室５内での羽根車１０の回転により、水等の流体が吸
込口１ａからポンプ室５内に吸い込まれ、吐出口１ｂか
ら吐き出され、磁気結合ポンプは運転される。Next, the operation of the magnetic coupling pump having the above configuration will be described. Stator coil 17 of each magnetic pole of stator 15
To generate a rotating magnetic field, the permanent magnet portion 7b of the cylindrical portion 7a of the rotor 7 rotates following the rotating magnetic field, so that the rotor 7 with the impeller 10 rotates. The rotation of the impeller 10 in the pump chamber 5 causes a fluid such as water to be sucked into the pump chamber 5 from the suction port 1a and discharged from the discharge port 1b, and the magnetic coupling pump is operated.
【００２３】この磁気結合ポンプでは、その回転駆動
時、固定軸８がその元部のみを固定して片持ち式に取り
付けられること、及びカップ状のロータ７がその底部の
中央に軸受部９を設けて片持ち式に支持されることか
ら、固定軸８の僅かな揺動や固定軸８と軸受部９の僅か
な隙間に起因して、ロータ７が固定軸８に対し傾斜する
ように揺動運動して、円筒部７ａの内周面の先端側角部
が、その内側の隔壁部４に接近して接触する恐れが生じ
る。In this magnetic coupling pump, the fixed shaft 8 is fixed at its base only in a cantilever manner during rotation and the cup-shaped rotor 7 has a bearing 9 at the center of its bottom. Since it is provided and supported in a cantilever manner, the rotor 7 is tilted with respect to the fixed shaft 8 due to a slight swing of the fixed shaft 8 and a small gap between the fixed shaft 8 and the bearing portion 9. Due to the kinetic movement, there is a risk that the corner on the tip end side of the inner peripheral surface of the cylindrical portion 7a approaches and comes into contact with the partition portion 4 inside the cylindrical portion 7a.
【００２４】しかしながら、円筒部７ａの内周面の先端
側角部を、断面楔状に円周方向に連続して切り欠いて、
そこにテーパ部７ｃを形成しているから、図２に示すよ
うに、ロータ７がその中心軸を傾斜する方向に揺動して
も、円筒部７ａの内周面と隔壁部４との接触を回避する
ことができる。このため、上記のように、円筒部７ａの
内周面と隔壁部４の隙間（エアーギャップ）は、最小に
狭く設定することができ、このような円筒部７ａの内周
面と隔壁部４の隙間の最小設定により、モータの駆動ト
ルクを低下させずに、効率の高い磁気結合ポンプとする
ことができる。However, the distal end side corner of the inner peripheral surface of the cylindrical portion 7a is cut continuously in the circumferential direction in a wedge-shaped cross section.
Since the tapered portion 7c is formed there, as shown in FIG. 2, even if the rotor 7 swings in the direction in which the center axis is inclined, the contact between the inner peripheral surface of the cylindrical portion 7a and the partition wall portion 4 does not occur. Can be avoided. For this reason, as described above, the gap (air gap) between the inner peripheral surface of the cylindrical portion 7a and the partition wall portion 4 can be set to be as small as possible. By setting the minimum gap, a highly efficient magnetic coupling pump can be achieved without reducing the driving torque of the motor.
【００２５】なお、上記実施の形態では、ロータ７の永
久磁石部７ｂを設けた円筒部７ａが隔壁部４を介してモ
ータのステータ１５の外側に配設されるアウターロータ
形の磁気結合ポンプであったが、モータのステータを外
側に配置し、隔壁部を介してその内側の円筒部にロータ
を配設するインナーロータ形の磁気結合ポンプとするこ
ともできる。この場合には、ロータの隔壁部に近い円筒
部の外周面の端部側角部を、断面楔状に円周方向に連続
して切り欠いて、そこにテーパ部を形成し、これによっ
て、ロータの揺動運動時のロータと隔壁部の接触を回避
し、上記と同様に、ロータの円筒部の外周面と隔壁部と
の隙間を最小に設定することにより、モータの駆動トル
クを低下させずに、効率の高い磁気結合ポンプとするこ
とができる。In the above embodiment, the outer rotor-type magnetic coupling pump in which the cylindrical portion 7a provided with the permanent magnet portion 7b of the rotor 7 is disposed outside the stator 15 of the motor via the partition wall portion 4 is used. However, an inner rotor type magnetic coupling pump in which the stator of the motor is disposed outside and the rotor is disposed in the cylindrical portion inside the partition via the partition wall portion may be used. In this case, the end side corner of the outer peripheral surface of the cylindrical portion close to the partition wall of the rotor is continuously cut in the circumferential direction in a wedge-shaped cross section, and a tapered portion is formed there. By avoiding the contact between the rotor and the partition during the rocking motion of the rotor, and by setting the gap between the outer peripheral surface of the cylindrical portion of the rotor and the partition to a minimum as described above, the driving torque of the motor is not reduced. Furthermore, a highly efficient magnetic coupling pump can be obtained.
【００２６】[0026]
【発明の効果】以上説明したように、本発明の磁気結合
ポンプによれば、ロータがその軸を傾斜する方向に揺動
しても、円筒部の端部側角部と隔壁部との接触を回避す
ることができるため、ロータの永久磁石部を設けた円筒
部と隔壁部の隙間（エアーギャップ）を、最小に狭く設
定することができ、これによって、モータの駆動トルク
を良好に確保し、効率の高い磁気結合ポンプとすること
ができる。As described above, according to the magnetic coupling pump of the present invention, even when the rotor swings in the direction in which its axis is inclined, the contact between the end corner of the cylindrical portion and the partition wall portion is maintained. Therefore, the gap (air gap) between the cylindrical portion on which the permanent magnet portion of the rotor is provided and the partition portion can be set to be as small as possible, whereby the driving torque of the motor can be ensured satisfactorily. A highly efficient magnetic coupling pump can be obtained.
【図１】本発明の一実施形態の磁気結合ポンプを示す断
面図である。FIG. 1 is a sectional view showing a magnetic coupling pump according to an embodiment of the present invention.
【図２】ロータが傾斜した状態の断面図である。FIG. 2 is a sectional view showing a state where a rotor is inclined.
【図３】ロータのテーパ部の部分拡大断面図である。FIG. 3 is a partially enlarged sectional view of a tapered portion of a rotor.
１−ポンプハウジング ２−モータハウジング ４−隔壁部 ５−ポンプ室 ５ａ−円筒空間部 ６−モータ室 ７−ロータ ７ａ−円筒部 ７ｂ−永久磁石部 ７ｃ−テーパ部 ８−固定軸 ９−永久磁石 １０−羽根車 １５−ステータ 1-Pump housing 2-Motor housing 4-Partition wall 5-Pump chamber 5a-Cylindrical space 6-Motor chamber 7-Rotor 7a-Cylinder 7b-Permanent magnet 7c-Tapered 8-Fixed shaft 9-Permanent magnet 10 -Impeller 15-Stator
Claims (3)
側に設けたハウジングと、該ポンプ室内に配設され片持
ち式の固定軸上に回転自在に支持されるロータと、該ロ
ータ上に一体的に設けられた羽根車と、該ロータの円筒
部に配設された永久磁石部と、該モータ室内に配設され
該円筒部の永久磁石部に該隔壁部を介して対向して配設
されたステータと、を備えてなる磁気結合ポンプにおい
て、 該ロータと該隔壁部との接触を回避するために、該ロー
タの円筒部における該隔壁部側の端部側角部にテーパ部
が、当該部分を断面楔状に円周方向に連続して切り欠く
ことにより形成されていることを特徴とする磁気結合ポ
ンプ。A housing provided with a pump chamber and a motor chamber inside through a partition, a rotor disposed in the pump chamber and rotatably supported on a cantilevered fixed shaft, and And an impeller integrally provided on the rotor, a permanent magnet disposed in the cylindrical portion of the rotor, and a permanent magnet disposed in the motor chamber and opposed to the permanent magnet of the cylindrical via the partition. A magnetic coupling pump comprising: a stator provided in the magnetic coupling pump, wherein in order to avoid contact between the rotor and the partition, a tapered portion is formed at an end-side corner of the cylindrical portion of the rotor on the partition side. The magnetic coupling pump is formed by cutting the portion continuously in a circumferential direction in a wedge-shaped cross section.
が前記隔壁部を介して前記ステータの外側に配設される
アウターロータ形の磁気結合ポンプであって、該円筒部
の内周面の先端側角部を、断面楔状に円周方向に連続し
て切り欠いて、前記テーパ部が形成されていることを特
徴とする請求項１記載の磁気結合ポンプ。2. An outer rotor-type magnetic coupling pump in which a cylindrical portion of a rotor provided with the permanent magnet portion is disposed outside the stator via the partition portion, wherein an inner peripheral surface of the cylindrical portion is provided. The magnetic coupling pump according to claim 1, wherein the tapered portion is formed by continuously cutting a corner portion on the distal end side in a circumferential direction in a wedge shape in section.
壁部を介してその内側の前記ロータの円筒部が配設され
るインナーロータ形の磁気結合ポンプであって、該ロー
タの該隔壁部に近い円筒部の外周面の端部側角部を、断
面楔状に円周方向に連続して切り欠いて、前記テーパ部
が形成されていることを特徴とする請求項１記載の磁気
結合ポンプ。3. An inner rotor type magnetic coupling pump in which the stator is disposed on the outside and the cylindrical portion of the rotor is disposed on the inner side of the stator via the partition. 2. The magnetic coupling pump according to claim 1, wherein the tapered portion is formed by continuously cutting a corner portion on an end portion of an outer peripheral surface of a close cylindrical portion in a circumferential direction in a wedge shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000123932A JP3880774B2 (en) | 2000-04-25 | 2000-04-25 | Magnetic coupling pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000123932A JP3880774B2 (en) | 2000-04-25 | 2000-04-25 | Magnetic coupling pump |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006045255A Division JP2006183669A (en) | 2006-02-22 | 2006-02-22 | Magnetic coupling pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001304165A true JP2001304165A (en) | 2001-10-31 |
| JP3880774B2 JP3880774B2 (en) | 2007-02-14 |
Family
ID=18634146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000123932A Expired - Fee Related JP3880774B2 (en) | 2000-04-25 | 2000-04-25 | Magnetic coupling pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3880774B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007100610A (en) * | 2005-10-05 | 2007-04-19 | Nidec Shibaura Corp | Rotor for pump |
| JP2007309193A (en) * | 2006-05-18 | 2007-11-29 | Asmo Co Ltd | Resin impeller for fluid pump and method for manufacturing the same |
| JP2008082268A (en) * | 2006-09-28 | 2008-04-10 | Nippon Densan Corp | Centrifugal pump |
| JP2010007539A (en) * | 2008-06-26 | 2010-01-14 | Hitachi Automotive Systems Ltd | Electric centrifugal pump |
-
2000
- 2000-04-25 JP JP2000123932A patent/JP3880774B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007100610A (en) * | 2005-10-05 | 2007-04-19 | Nidec Shibaura Corp | Rotor for pump |
| JP2007309193A (en) * | 2006-05-18 | 2007-11-29 | Asmo Co Ltd | Resin impeller for fluid pump and method for manufacturing the same |
| JP4699942B2 (en) * | 2006-05-18 | 2011-06-15 | アスモ株式会社 | Resin impeller for fluid pump and method for manufacturing the same |
| JP2008082268A (en) * | 2006-09-28 | 2008-04-10 | Nippon Densan Corp | Centrifugal pump |
| JP2010007539A (en) * | 2008-06-26 | 2010-01-14 | Hitachi Automotive Systems Ltd | Electric centrifugal pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3880774B2 (en) | 2007-02-14 |
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