JP2007032452A - Canned pump - Google Patents

Canned pump Download PDF

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Publication number
JP2007032452A
JP2007032452A JP2005218148A JP2005218148A JP2007032452A JP 2007032452 A JP2007032452 A JP 2007032452A JP 2005218148 A JP2005218148 A JP 2005218148A JP 2005218148 A JP2005218148 A JP 2005218148A JP 2007032452 A JP2007032452 A JP 2007032452A
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JP
Japan
Prior art keywords
rotor
bearing
pump
canned pump
casing
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Pending
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JP2005218148A
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Japanese (ja)
Inventor
Takenori Kawashima
丈典 川島
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Nidec Shibaura Corp
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Nidec Shibaura Corp
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Application filed by Nidec Shibaura Corp filed Critical Nidec Shibaura Corp
Priority to JP2005218148A priority Critical patent/JP2007032452A/en
Publication of JP2007032452A publication Critical patent/JP2007032452A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a canned pump with a bearing part which is formed in one piece as desired in the point of concentricity, although it is conventionally formed in two pieces in many cases when a central shaft is long, in particular. <P>SOLUTION: The canned pump 1 comprises a stator 2 molded with a winding 4 applied on a core 3 having laminated electromagnetic steel plates, a rotor 9 having a plastic magnet 8 and an impeller formed in one unit, a casing 10 having a flow-in port 11 and a flow-out port 12 and divided in two for the rotor 9 to be inserted therein, and a shaft 13 located at the center of the casing 10 for supporting the rotor 9. A recessed groove 15 is provided in the center in the inner diameter line of a bearing 14 formed integrally with the rotor 9. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明はキャンドポンプに設けられた軸受に関するものである。   The present invention relates to a bearing provided in a canned pump.

従来、モールド成形により防液加工した固定子と、回転運動を行う回転子と、該回転子を内部に搭載したハウジングとを組み合わせたキャンドポンプが公知となっている。たとえば、ハウジングが、流体の流入口部と流出口部とを有したポンプ室部と、モータ室部とを備え、ロータが略円板状の基部の表面側に突設されて、前記ポンプ室部側に配置されるインペラと、前記基部の裏面側から突設されて前記モータ室部側に配置される略円筒状の磁石部とを備えて、前記流体中に配設される構成とするとともに、前記磁石部の内周側に配置される前記モータ室部側のステータによって発生する回転磁界により回転駆動されて、前記流体を前記流入口部から流入させて前記流出口部から流出させる磁気結合ポンプであって、前記ステータの内周側に、前記ロータの磁石部の内周面側及び前記基部の裏面側と連通するように、前記流体の流入する流入凹部が配設されていることを特徴とする磁気結合ポンプ等が開示されている。
特開2004−346774号公報
2. Description of the Related Art Conventionally, a canned pump is known in which a stator that has been liquid-proof processed by molding, a rotor that performs rotational movement, and a housing in which the rotor is mounted are combined. For example, the housing includes a pump chamber portion having a fluid inlet portion and an outlet portion, and a motor chamber portion, and the rotor projects from the surface side of the substantially disk-shaped base portion, and the pump chamber An impeller disposed on the portion side and a substantially cylindrical magnet portion projecting from the back surface side of the base portion and disposed on the motor chamber portion side, and disposed in the fluid. In addition, the magnetism is rotationally driven by a rotating magnetic field generated by the stator on the motor chamber portion side disposed on the inner peripheral side of the magnet portion, and causes the fluid to flow in from the inlet portion and to flow out from the outlet portion. In the coupling pump, an inflow recess into which the fluid flows is disposed on the inner peripheral side of the stator so as to communicate with the inner peripheral surface side of the magnet portion of the rotor and the rear surface side of the base portion. A magnetic coupling pump or the like featuring There.
JP 2004-346774 A

しかしながら従来は、図2に示すように、キャンドポンプのベアリングメタルと呼ばれる軸受101は、回転子を支持するための軸が特に長い場合、従来の構造のように2ピースに分けて形成されることが多かった。しかし、この構造だと部材が増える分コスト高となってしまう。また軸受の同心度の確保が困難となり、ポンプの雑音や過磨耗となるため、ポンプの寿命が短くなったり、故障しやすくなったりするという問題を有していた。   However, conventionally, as shown in FIG. 2, a bearing 101 called a bearing metal of a can pump is formed in two pieces as in the conventional structure when the shaft for supporting the rotor is particularly long. There were many. However, this structure increases the cost because the number of members increases. Further, it has been difficult to ensure the concentricity of the bearings, resulting in noise and excessive wear of the pump, resulting in a problem that the life of the pump is shortened and failure is likely to occur.

軸受はやはり1ピースであることが望ましいのであるが、1ピースの長軸であると、組み付け時に軸受部を冷却した際、ヒケや窪みが発生することが避けられなかった。   It is desirable that the bearing is also one piece. However, when the bearing is a long piece, it is inevitable that sinks and depressions are generated when the bearing portion is cooled during assembly.

本発明は上記の問題に鑑み、ヒケの発生を極力抑え、低コストでポンプの寿命も長く、故障も少ないキャンドポンプの軸受を提供することを目的とする。   In view of the above problems, an object of the present invention is to provide a can pump bearing that suppresses the occurrence of sink marks as much as possible, is low in cost, has a long pump life, and has few failures.

請求項1に係る発明は、電磁鋼板を積層してなるコアに巻線を施してモールド成形した固定子と、プラスチックマグネットとインペラを一体成形した回転子と、流入口と流出口を備え該回転子を挿入するために分割した2個のケーシングと、該ケーシングの中央に位置し前記2個のケーシングで保持され該回転子を支持する軸と、長円筒状の軸受とを、備えたキャンドポンプにおいて、該軸受は、回転子形成時に一体に保持され、かつ、この軸受の内径側の中央部に、凹形状の溝を設けたことを特徴とするキャンドポンプである。   The invention according to claim 1 comprises a stator formed by winding a core formed by laminating electromagnetic steel sheets, a rotor integrally formed with a plastic magnet and an impeller, an inlet and an outlet, and the rotation. A can pump having two casings divided for inserting a child, a shaft positioned in the center of the casing and supported by the two casings to support the rotor, and a long cylindrical bearing The bearing is a canned pump characterized in that the bearing is integrally held when the rotor is formed, and a concave groove is provided in the central portion on the inner diameter side of the bearing.

請求項2に係る発明は、前記軸受の両端にスラストワッシャを組み付けてなることを特徴とした請求項1記載のキャンドポンプである。   The invention according to claim 2 is the canned pump according to claim 1, wherein a thrust washer is assembled to both ends of the bearing.

本発明の請求項1に係る発明においては、軸受が従来の2ピースから1ピースに変えているため、成形方法が容易なものとなる。   In the invention according to claim 1 of the present invention, since the bearing is changed from the conventional two-piece to the one-piece, the molding method becomes easy.

また、1ピースにすることで、各部品の互いの同心度を取りやすくなり、ポンプの雑音や過磨耗を抑えることができ、結果、ポンプの寿命を長くすることができる。   Moreover, by using one piece, it becomes easy to obtain the concentricity of each part, and pump noise and excessive wear can be suppressed. As a result, the life of the pump can be extended.

また、軸受内径中央部を凹形状にし、軸受成形時に樹脂の冷却時間を均一にすることで、熱伝導を良くして、成形後樹脂冷却時のヒケや窪みの発生を防ぎ、寿命の長い軸受を提供できる。   In addition, the bearing has a long service life by making the central part of the inner diameter of the bearing concave and making the resin cooling time uniform during bearing molding to improve heat conduction and prevent the formation of sink marks and depressions during resin cooling after molding. Can provide.

本発明の請求項2に係る発明においては、軸受の端面磨耗が抑制され軸受の寿命の長いものを提供できる。   In the invention according to claim 2 of the present invention, it is possible to provide a bearing having a long life because the end face wear of the bearing is suppressed.

以下、本案の実施形態を図面に基づいて説明する。図1は本発明のキャンドポンプ1の一部断面側面図である。固定子2は、電磁鋼板を積層して形成されたコア3に巻線4を施し、モールド成形により防液加工している。シュラウド5とシュラウド受け部材6と前記部材5,6に挟み込まれてなるブレード7とでインペラ部分を形成し、このインペラとプラスチック製のマグネット8とが、組み付け用ピン(図示せず)で組み合わされて、回転子9が形成してなる。ケーシング10は、流入口11及び流出口12を設けている上部と、前記固定子2と組み合わされる下部で形成されている。このケーシング10の中央部には軸13が設けられており、回転子9を支持している。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial sectional side view of a canned pump 1 of the present invention. In the stator 2, a winding 4 is applied to a core 3 formed by laminating electromagnetic steel plates, and liquid-proof processing is performed by molding. An impeller portion is formed by the shroud 5, the shroud receiving member 6 and the blade 7 sandwiched between the members 5 and 6, and the impeller and the plastic magnet 8 are combined by an assembly pin (not shown). Thus, the rotor 9 is formed. The casing 10 is formed of an upper part provided with an inlet 11 and an outlet 12 and a lower part combined with the stator 2. A shaft 13 is provided at the center of the casing 10 and supports the rotor 9.

前記回転子9の中央部にはカーボン樹脂製の軸受14が一体に成形されている。この軸受14を成形する際、軸受14の内径側の中央部には、凹形状のヒケ防止用溝15を設けるようにする。溝15を設けている部分は、細くなっているため樹脂の冷却時間が均一になり、成形時における冷却の際に発生するヒケや窪みの発生を抑えることができる。   A carbon resin bearing 14 is integrally formed at the center of the rotor 9. When the bearing 14 is molded, a concave anti-sink groove 15 is provided in the central portion on the inner diameter side of the bearing 14. Since the portion provided with the groove 15 is thin, the cooling time of the resin becomes uniform, and the occurrence of sink marks and depressions that occur during cooling during molding can be suppressed.

軸13の両端にスラストワッシャ16を組み付けてもよい。これにより、軸受14の端面磨耗が抑制される。   Thrust washers 16 may be assembled to both ends of the shaft 13. Thereby, end face wear of bearing 14 is controlled.

本発明のキャンドポンプは医療機器、家電製品等、キャンドポンプが必要とされるあらゆる分野のものに応用可能である。   The canned pump of the present invention can be applied to all fields where a canned pump is required, such as medical equipment and home appliances.

本発明のキャンドポンプの一部断面側面図。The partial cross section side view of the can pump of this invention. 従来のキャンドポンプの一部断面側面図。The partial cross section side view of the conventional can pump.

符号の説明Explanation of symbols

1 キャンドポンプ
2 固定子
3 コア
4 巻線
5 シュラウド
6 シュラウド受け部材
7 ブレード
8 プラスチックマグネット
9 回転子
10 ケーシング
11 流入口
12 流出口
13 軸
14、101 軸受
15 ヒケ防止用溝
16 スラストワッシャ
DESCRIPTION OF SYMBOLS 1 Cand pump 2 Stator 3 Core 4 Winding 5 Shroud 6 Shroud receiving member 7 Blade 8 Plastic magnet 9 Rotor 10 Casing 11 Inlet 12 Outlet 13 Shafts 14 and 101 Bearing 15 Sink prevention groove 16 Thrust washer

Claims (2)

電磁鋼板を積層してなるコアに巻線を施してモールド成形した固定子と、プラスチックマグネットとインペラを一体成形した回転子と、流入口と流出口を備え該回転子を挿入するために分割した2個のケーシングと、該ケーシングの中央に位置し前記2個のケーシングで保持され該回転子を支持する軸と、長円筒状の軸受とを備えたキャンドポンプにおいて、該軸受は、回転子形成時に一体に保持され、かつ、この軸受の内径側の中央部に、凹形状の溝を設けたことを特徴とするキャンドポンプ。   A stator formed by winding a core formed by stacking electromagnetic steel sheets, a rotor integrally molded with a plastic magnet and an impeller, an inlet and an outlet, and divided to insert the rotor In a canned pump comprising two casings, a shaft positioned in the center of the casing and supported by the two casings and supporting the rotor, and a long cylindrical bearing, the bearings are rotor-forming. A canned pump characterized in that it is sometimes held integrally and a concave groove is provided in the central part on the inner diameter side of the bearing. 前記軸受の両端にスラストワッシャを組み付けてなることを特徴とした請求項1記載のキャンドポンプ。   The can pump according to claim 1, wherein a thrust washer is assembled to both ends of the bearing.
JP2005218148A 2005-07-28 2005-07-28 Canned pump Pending JP2007032452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005218148A JP2007032452A (en) 2005-07-28 2005-07-28 Canned pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005218148A JP2007032452A (en) 2005-07-28 2005-07-28 Canned pump

Publications (1)

Publication Number Publication Date
JP2007032452A true JP2007032452A (en) 2007-02-08

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ID=37791986

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005218148A Pending JP2007032452A (en) 2005-07-28 2005-07-28 Canned pump

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JP (1) JP2007032452A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008278739A (en) * 2007-03-30 2008-11-13 Nidec Sankyo Corp Motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008278739A (en) * 2007-03-30 2008-11-13 Nidec Sankyo Corp Motor

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