JP2006097470A - Canned motor pump - Google Patents

Canned motor pump Download PDF

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JP2006097470A
JP2006097470A JP2004280793A JP2004280793A JP2006097470A JP 2006097470 A JP2006097470 A JP 2006097470A JP 2004280793 A JP2004280793 A JP 2004280793A JP 2004280793 A JP2004280793 A JP 2004280793A JP 2006097470 A JP2006097470 A JP 2006097470A
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path
pump
liquid
handling liquid
foreign matter
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Yoshihiko Kawachi
良彦 河地
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Mitsui Engineering and Shipbuilding Co Ltd
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Mitsui Engineering and Shipbuilding Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a canned motor pump enabling the cooling of a motor part and the lubrication of bearings by easily and securely removing foreign matter such as slurry in a handling liquid to circulate it without allowing the internal circulation passage of a housing to be clogged. <P>SOLUTION: A part of the handling liquid L flowing in a discharge passage 18 is led from an inlet passage 5a into a liquid cyclone 6. In the liquid cyclone 6, a swirl flow is caused by the delivery pressure of the handling liquid L, the foreign matter with high specific gravities is centrifugally separated from a handling liquid L1 from which the foreign matter is removed, and a handling liquid L2 containing the foreign matter is recirculated again to an intake passage 16 through a separating recirculation passage 7. The handling liquid L1 without the foreign matter flows into the internal circulation passage 11 of the housing 2 on the motor part 4 side through the inlet passage 5a connected to the upper part of the liquid cyclone 6 and circulates to cool the motor part 4 and lubricate the bearings 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、キャンドモータポンプに関し、さらに詳しくは、取扱い液中の固形物、夾雑物等の異物を除去して、ハウジングの内部循環路を詰まらせることなく、循環させてモータ部の冷却および軸受の潤滑を可能とするキャンドモータポンプに関するものである。   The present invention relates to a canned motor pump, and more specifically, removes foreign matters such as solids and contaminants in the handling liquid and circulates them without clogging the internal circulation path of the housing, thereby cooling the motor unit and bearings. The present invention relates to a canned motor pump that enables lubrication.

従来、外部に取扱い液を漏らすことが、厳しく規制される化学プラントなどに使用されるポンプには、モータ部とポンプ部とを連結して一体化し、ハウジングに密閉状態で収容したキャンドモータポンプが用いられている。このキャンドモータポンプは、取扱い液を吸込路から吸込んで吐出路に吐出するとともに、ハウジング内に設けられた内部循環路を取扱い液が循環して、ハウジングのモータ部の冷却および軸受の潤滑をする構造となっている。   Conventionally, pumps used in chemical plants and the like where handling liquid leaks to the outside are strictly controlled, a canned motor pump in which a motor unit and a pump unit are connected and integrated and housed in a sealed state in a housing. It is used. The canned motor pump sucks the handling liquid from the suction path and discharges it to the discharge path, and the handling liquid circulates in the internal circulation path provided in the housing to cool the motor portion of the housing and lubricate the bearing. It has a structure.

この内部循環路には非常に狭い部分があるため、取扱い液がスラリ（砂等の固体物）や固着性のあるタール等の異物を含んでいる場合は、異物が途中で詰まったり、内部循環路内壁に固着することによって冷却効果の低下や軸受の潤滑ができないといった問題が生じる。   Since this internal circulation path has a very narrow part, if the handling liquid contains slurry (solid material such as sand) or sticking tar or other foreign matter, the foreign matter may become clogged in the middle or the internal circulation There are problems that the cooling effect is reduced and the bearing cannot be lubricated by being fixed to the inner wall of the road.

そこで、図３に示すように取扱い液Ｌがスラリ等の異物を含む場合は、別途、外部にフラッシング液供給装置２０を設けて、フラッシング液Ｆを加圧しながら内部循環路１１を介してモータ部４に供給して、モータ部４の冷却および軸受２１の潤滑をするようにしている。必要に応じてフラッシング液循環路１９を設置して、インタークーラー１０でフラッシング液Ｆを冷却している。   Therefore, as shown in FIG. 3, when the handling liquid L contains foreign matters such as slurry, a flushing liquid supply device 20 is separately provided outside, and the motor unit is connected via the internal circulation path 11 while pressurizing the flushing liquid F. 4 to cool the motor unit 4 and lubricate the bearing 21. A flushing liquid circulation path 19 is installed as necessary, and the intercooler 10 cools the flushing liquid F.

この際に、図４に詳細を示すように内部循環路１１を介してモータ部４からポンプ部３へフラッシング液Ｆが流出するので、この流出流量を抑制したい場合は、メカニカルシール８を設ける構造としている。   At this time, as shown in detail in FIG. 4, the flushing liquid F flows out from the motor unit 4 to the pump unit 3 via the internal circulation path 11. It is said.

しかしながら、モータ部４とポンプ部３との間の内部循環路１１にメカニカルシール８を設置しても、少しずつフラッシング液Ｆが流出するので、フラッシング液Ｆの補充が必要であった。また、取扱い液Ｌにフラッシング液Ｆを混合させたくない場合は、異物を含まない取扱い液Ｌを用意してフラッシング液Ｆにしなければならないという問題も生じる。   However, even if the mechanical seal 8 is installed in the internal circulation path 11 between the motor unit 4 and the pump unit 3, the flushing liquid F flows out little by little, so that the flushing liquid F needs to be replenished. In addition, when it is not desired to mix the flushing liquid F with the handling liquid L, there arises a problem that the handling liquid L that does not contain foreign matters must be prepared and used as the flushing liquid F.

また、取扱い液のスラリを分離して、清浄な水のみを内部循環路に流入させて、モータ部の冷却および軸受の潤滑をするようにしたキャンドモータポンプが提案されている（特許文献１参照）。この提案では、内部循環路のモータ部への入り口にモータ回転軸に取付けられたサンドカラーが設けられている。このサンドカラーが回転することによって、取扱い液のスラリが遠心分離されて清浄な水のみが、サンドカラーによってすき間が狭く設定された内部循環路を通過して、モータ部の冷却に使用される構造となっている。   Further, a canned motor pump has been proposed in which a slurry of the handling liquid is separated and only clean water is allowed to flow into the internal circulation path to cool the motor unit and lubricate the bearing (see Patent Document 1). ). In this proposal, a sand collar attached to the motor rotation shaft is provided at the entrance to the motor portion of the internal circulation path. By rotating this sand collar, the slurry of the handling liquid is centrifuged and only clean water passes through the internal circulation path where the gap is set narrow by the sand collar and used to cool the motor unit It has become.

しかしながら、この提案では、サンドカラーによって、スラリの流入を阻止する一方で、清浄な水の流入を確保するために、内部循環路のすき間を適切に設定する必要があるが、サンドカラーは回転体なので、このすき間を一定に保つためには、ゆがみや偏心をなくしてサンドカラーを設置しなければならず高度な加工、組立て精度が必要であった。また、経時的にサンドカラーにゆがみ等が生じて、このすき間が変化して確実にスラリの流入を防止するのは困難であった。
特開平７−１０９９８８号公報 However, in this proposal, it is necessary to set the clearance of the internal circulation path appropriately in order to prevent the inflow of slurry by the sand collar while ensuring the inflow of clean water. Therefore, in order to keep this gap constant, a sand collar had to be installed without distortion and eccentricity, and high processing and assembly accuracy were required. In addition, the sand color is distorted over time, and it is difficult to reliably prevent the slurry from flowing in by changing the gap.
Japanese Patent Laid-Open No. 7-109988

本発明の目的は、取扱い液中のスラリ等の異物を容易、かつ、確実に除去して、ハウジングの内部循環路を詰まらせることなく循環させて、モータ部の冷却および軸受の潤滑を可能とするキャンドモータポンプを提供することにある。   The object of the present invention is to easily and surely remove foreign matters such as slurry in the handling liquid and circulate without clogging the internal circulation path of the housing, thereby enabling cooling of the motor part and lubrication of the bearing. An object of the present invention is to provide a canned motor pump.

上記目的を達成するため本発明のキャンドモータポンプは、ポンプ部とモータ部とを連結して一体的にハウジングに収容し、該ハウジングに取扱い液を循環させる内部循環路を内設するキャンドモータポンプにおいて、前記ポンプ部から吐出される取扱い液を流通させる吐出路と前記内部循環路とを連結する導入路と、該導入路に設けられた異物分離部と、該異物分離部と前記ポンプ部に取扱い液を吸込む吸込路または前記吐出路とを連結する分離還流路とを備えたことを特徴とするものである。   In order to achieve the above object, a canned motor pump according to the present invention is a canned motor pump in which a pump part and a motor part are connected and integrally accommodated in a housing, and an internal circulation path for circulating a handling liquid is provided in the housing. In the above, the introduction path for connecting the discharge path for circulating the handling liquid discharged from the pump section and the internal circulation path, the foreign substance separation section provided in the introduction path, the foreign substance separation section and the pump section A suction path for sucking a handling liquid or a separation reflux path for connecting the discharge path is provided.

本発明のキャンドモータポンプによれば、ポンプ部とモータ部とを連結して一体的にハウジングに収容し、このハウジングに取扱い液を循環させる内部循環路を内設するキャンドモータポンプにおいて、ポンプ部から吐出される取扱い液を流通させる吐出路と内部循環路とを連結する導入路に異物分離部を設けたので、取扱い液と異物とを分離させて、異物を除去した取扱い液を導入路を介して内部循環路に循環させることができる。   According to the canned motor pump of the present invention, in the canned motor pump in which the pump portion and the motor portion are connected and integrally accommodated in the housing, and the internal circulation path for circulating the handling liquid is provided in the housing, the pump portion Since the foreign substance separation part is provided in the introduction path that connects the discharge path that circulates the handling liquid discharged from the internal circulation path, the handling liquid and foreign substances are separated to remove the handling liquid from the introduction path. Can be circulated through the internal circulation path.

また、分離還流路を設けて、異物分離部とポンプ部に取扱い液を吸込む吸込路または吐出路とを連結したので、異物濃度の高い取扱い液は、ポンプによって揚送される。   Further, since the separation reflux path is provided and the foreign matter separation part and the suction part or the discharge path for sucking the handling liquid are connected to the pump part, the handling liquid having a high foreign matter concentration is pumped by the pump.

以上のように、異物の内部循環路での詰まり、内壁への固着を防止しつつ、取扱い液を用いてモータ部の冷却や軸受の潤滑を容易かつ確実にすることができる。   As described above, it is possible to easily and reliably cool the motor unit and lubricate the bearing using the handling liquid while preventing clogging of foreign matter in the internal circulation path and adhering to the inner wall.

以下、本発明のキャンドモータポンプを図に示した実施形態に基づいて説明する。図１は実施形態の一例を示すキャンドモータポンプ縦断面側面図であり、ポンプ部３等の右側は上部のみの断面を示す半断面図となっている。このキャンドモータポンプ１は、ポンプ部３とモータ部４とが連結して一体的にハウジング２内に収容されている。ハウジング２内部には、モータ部４とポンプ部３とを連通可能な内部循環路１１が設けられている。   Hereinafter, the canned motor pump of the present invention will be described based on the embodiments shown in the drawings. FIG. 1 is a vertical sectional side view of a canned motor pump showing an example of the embodiment, and the right side of the pump unit 3 and the like is a half sectional view showing a cross section of only the upper part. The canned motor pump 1 is housed in a housing 2 integrally with a pump unit 3 and a motor unit 4 connected to each other. Inside the housing 2, an internal circulation path 11 that can communicate the motor unit 4 and the pump unit 3 is provided.

ポンプ部３の吸込口２２には吸込路１６が接続され、吐出口１７には吐出路１８が接続されて、この吐出路１８には導入路５ａの一端が連結されている。導入路５は、その中途に異物分離部となる液体サイクロン６と切換弁９と、インタークーラー１０とを備え、他端をハウジング２のモータ部４側に連結して、導入路５と内部循環路１１とが連通するようになっている。液体サイクロン６の下端部と吸込路１６とは、分離還流路７によって連結されている。   A suction path 16 is connected to the suction port 22 of the pump unit 3, a discharge path 18 is connected to the discharge port 17, and one end of the introduction path 5 a is connected to the discharge path 18. The introduction path 5 includes a hydrocyclone 6 serving as a foreign matter separating part, a switching valve 9 and an intercooler 10 in the middle, and the other end is connected to the motor part 4 side of the housing 2 so that the introduction path 5 and the internal circulation path are provided. 11 is in communication. The lower end portion of the hydrocyclone 6 and the suction path 16 are connected by a separation reflux path 7.

切換弁９には、フラッシング液供給装置２０からの供給管が連結されていて、外部から導入路５ｂにフラッシング液Ｆが供給可能となっている。さらに、切換弁９と吸込路１６とを連結するバイパス路２３が設けられている。   A supply pipe from the flushing liquid supply device 20 is connected to the switching valve 9 so that the flushing liquid F can be supplied to the introduction path 5b from the outside. Further, a bypass path 23 that connects the switching valve 9 and the suction path 16 is provided.

ハウジング２内部には、シャフト１２が回転可能に軸受２１によって支持されて、ポンプ部３では、このシャフト１２に羽根車１５が固定されている。また、モータ部４では、ロータ１３がシャフト１２の外周を覆うように設置され、ロータ１３に対向するように、ハウジング２の内壁にステータ１４が配置されている。   Inside the housing 2, a shaft 12 is rotatably supported by a bearing 21, and an impeller 15 is fixed to the shaft 12 in the pump unit 3. In the motor unit 4, the rotor 13 is installed so as to cover the outer periphery of the shaft 12, and the stator 14 is disposed on the inner wall of the housing 2 so as to face the rotor 13.

次に、このキャンドモータポンプ１がスラリ（砂等の固体物）や固着性のあるタール等の異物を含んだ取扱い液Ｌを揚送する場合を説明する。モータ部４で生じる起動力によってシャフト１２が回転するとポンプ部３の羽根車１５も回転して、吸込路１６から取扱い液Ｌを吸込んで吐出路１８へ吐出する。吐出路１８を流れる取扱い液Ｌの一部は、導入路５ａから液体サイクロン６に導かれる。   Next, the case where the canned motor pump 1 lifts the handling liquid L containing foreign matters such as slurry (solid matter such as sand) and sticking tar will be described. When the shaft 12 is rotated by the starting force generated by the motor unit 4, the impeller 15 of the pump unit 3 is also rotated, and the handling liquid L is sucked from the suction path 16 and discharged to the discharge path 18. A part of the handling liquid L flowing through the discharge path 18 is guided to the liquid cyclone 6 from the introduction path 5a.

液体サイクロン６では、導入路５ａに導入された取扱い液Ｌの吐出圧力によって旋回流が発生し、比重の大きい異物と異物が除去された取扱い液Ｌ１とに遠心分離される。異物を含んで、異物濃度の高い取扱い液Ｌ２は下端部に連結された分離還流路７を経て再度、吸込路１６に還流される。このような液体サイクロン６を用いると、旋回流を発生させる装置を別途設ける必要がなく、容易かつ低コストで取扱い液Ｌと異物とを遠心分離させることができる。   In the hydrocyclone 6, a swirling flow is generated by the discharge pressure of the handling liquid L introduced into the introduction path 5a, and is separated into a foreign substance having a large specific gravity and a handling liquid L1 from which the foreign substance has been removed. The handling liquid L2 containing foreign matter and having a high foreign matter concentration is refluxed again to the suction passage 16 via the separation reflux path 7 connected to the lower end. When such a liquid cyclone 6 is used, it is not necessary to separately provide a device for generating a swirling flow, and the handling liquid L and the foreign matter can be easily and inexpensively centrifuged.

液体サイクロン６に代えて、異物分離部６に抵抗の小さい装置を採用する場合は、この異物分離部６に一端を連結した分離還流路７は、その他端を吸込路１６に限らず、吐出路１８に連結することもできる。この場合は、その他端を導入路５ａと吐出路１８との連結部よりも取扱い液Ｌの吐出方向下流側となる位置に連結するのが好ましい。この位置で連結すると異物濃度の高い取扱い液Ｌ２を再度、ポンプ部３や異物分離部６に流入させずに済むことになる。尚、吸込路１６、吐出路１８とは、それぞれ吸込口２２、吐出口１７に別途、取付けられるものだけでなく、ポンプ部３に一体的に形成されているものも含むものである。   In the case where a device having a small resistance is adopted for the foreign matter separation unit 6 instead of the hydrocyclone 6, the separation reflux path 7 having one end connected to the foreign matter separation unit 6 is not limited to the suction path 16 but the discharge end. 18 can also be connected. In this case, it is preferable to connect the other end to a position that is downstream in the discharge direction of the handling liquid L from the connecting portion between the introduction path 5a and the discharge path 18. When connected at this position, the handling liquid L2 having a high foreign matter concentration does not need to flow again into the pump unit 3 or the foreign matter separation unit 6. The suction path 16 and the discharge path 18 include not only those separately attached to the suction port 22 and the discharge port 17 but also those formed integrally with the pump unit 3.

一方、異物が除去された取扱い液Ｌ１は、液体サイクロン６の上部に連結された導入路５ｂを経てモータ部４側のハウジング２の内部循環路１１に流入する。これによって、異物の除去された取扱い液Ｌ１が内部循環路１１を介してモータ部４からポンプ部３へ循環することになるので、異物による詰まりや内壁への固着を防ぎつつ、モータ部４の冷却と軸受２１の潤滑が可能となる。この構造であれば、ポンプ１で揚送する取扱い液Ｌの一部をフラッシング液Ｆとして使用するので、補充の必要もなく連続的にモータ部４の冷却と軸受２１の潤滑をすることができる。   On the other hand, the handling liquid L1 from which the foreign matters have been removed flows into the internal circulation path 11 of the housing 2 on the motor unit 4 side through the introduction path 5b connected to the upper part of the liquid cyclone 6. As a result, since the handling liquid L1 from which foreign matter has been removed circulates from the motor unit 4 to the pump unit 3 via the internal circulation path 11, the clogging by the foreign matter and sticking to the inner wall can be prevented, while the motor unit 4 Cooling and lubrication of the bearing 21 are possible. With this structure, since a part of the handling liquid L pumped by the pump 1 is used as the flushing liquid F, the motor unit 4 can be continuously cooled and the bearing 21 can be lubricated without the need for replenishment. .

尚、この実施形態では図１に示すように、内部循環路１１のモータ部４とポンプ部３との間に異物が除去された取扱い液Ｌ１が、ポンプ部３側に自由に流通する構造としているが、異物が除去された取扱い液Ｌ１を多量に確保できない場合は、図２に示すように内部循環路１１のモータ部４とポンプ部３との間にメカニカルシール８を設けて、異物が除去された取扱い液Ｌ１がポンプ部３側へ流出する流量を抑制できる構造とする。メカニカルシール８に代えて、または更にグランドパッキン等のシールを設けてもよい。さらには、流路抵抗を持たせる構造だけでもよい。このとき、冷却性能が低下する場合は、異物の除去された取扱い液Ｌ１を内部循環路１１に流通させた後にインタークーラー１０へ戻すバイパスラインを設けることが望ましい。   In this embodiment, as shown in FIG. 1, the handling liquid L1 from which foreign matters are removed between the motor part 4 and the pump part 3 of the internal circulation path 11 freely flows to the pump part 3 side. However, if a large amount of the handling liquid L1 from which foreign matter has been removed cannot be secured, a mechanical seal 8 is provided between the motor part 4 and the pump part 3 of the internal circulation path 11 as shown in FIG. The structure is such that the flow rate at which the removed handling liquid L1 flows out to the pump unit 3 side can be suppressed. A seal such as a gland packing may be provided instead of or in addition to the mechanical seal 8. Furthermore, only the structure which gives flow-path resistance may be sufficient. At this time, when the cooling performance is deteriorated, it is desirable to provide a bypass line for returning the handling liquid L1 from which foreign substances have been removed to the intercooler 10 after circulating the handling liquid L1.

インタークーラー１０は、必要に応じて導入路５の中途に設置すればよく、これによって取扱い液Ｌ１を冷却して、モータ部４の冷却効果を向上させることができる。   The intercooler 10 may be installed in the midway of the introduction path 5 as necessary, thereby cooling the handling liquid L1 and improving the cooling effect of the motor unit 4.

ポンプ始動時等の取扱い液Ｌの吐出流量や吐出圧力が不足して、液体サイクロン６によって十分に取扱い液Ｌと異物との遠心分離ができない場合は、導入路５に設けた切換弁９を閉めて、異物の内部循環路１１への流入を防止、あるいは、取扱い液Ｌをバイパス路２３を経由させて吐出路１８に戻すことができる。さらには、一時的にフラッシング液供給装置２０から導入路５ｂにフラッシング液Ｆを供給することができる。実施形態では、切換弁９を液体サイクロン６の下流側となる導入路５ｂに設置しているが、この位置に代えて、または更に液体サイクロン６の上流側となる導入路５ａに設けて、異物の内部循環路１１への流入を防止することもできる。   When the discharge flow rate or discharge pressure of the handling liquid L at the time of pump start or the like is insufficient and the liquid cyclone 6 cannot sufficiently separate the handling liquid L from the foreign matter, the switching valve 9 provided in the introduction path 5 is closed. Thus, it is possible to prevent foreign matter from flowing into the internal circulation path 11 or return the handling liquid L to the discharge path 18 via the bypass path 23. Furthermore, the flushing liquid F can be temporarily supplied from the flushing liquid supply apparatus 20 to the introduction path 5b. In the embodiment, the switching valve 9 is installed in the introduction path 5b on the downstream side of the liquid cyclone 6, but in place of this position or in the introduction path 5a on the upstream side of the liquid cyclone 6, there Can be prevented from flowing into the internal circulation path 11.

この実施形態では、吐出口１７に別途、連結した吐出路１８に導入路５を連結しているが、吐出口１７に一体的に形成した吐出路１８に導入路５を連結した構造のキャンドモータポンプとしてもよい。また、吸込口２２に別途、連結した吸込路１６にバイパス路２３と分離還流路７とを連結しているが、吸込口２２に一体的に形成した吸込路１６にバイパス路２３と分離還流路７とを連結した構造のキャンドモータポンプとしてもよい。   In this embodiment, the introduction path 5 is connected to the discharge path 18 that is separately connected to the discharge port 17. However, the canned motor has a structure in which the introduction path 5 is connected to the discharge path 18 formed integrally with the discharge port 17. It is good also as a pump. In addition, the bypass path 23 and the separation reflux path 7 are connected to the suction path 16 separately connected to the suction port 22, but the bypass path 23 and the separation reflux path are integrally formed in the suction path 22. 7 may be used as a canned motor pump.

尚、本発明のキャンドモータポンプ１とは、ポンプ部３とモータ部４とを連結して一体的にハウジング２に収容し、このハウジング２に取扱い液Ｌを循環させる内部循環路１１を内設するポンプを意味し、同構造のいわゆるマグネットポンプも含むものである。   The canned motor pump 1 according to the present invention includes a pump unit 3 and a motor unit 4 which are connected together and housed in a housing 2, and an internal circulation path 11 for circulating the handling liquid L is provided in the housing 2. This includes a so-called magnet pump having the same structure.

本発明のキャンドモータポンプの実施形態を示す縦断面側面図である。It is a longitudinal cross-sectional side view which shows embodiment of the canned motor pump of this invention. 図１においてメカニカルシールを設けた場合のＡ部拡大図である。It is the A section enlarged view at the time of providing a mechanical seal in FIG. 従来のスラリ流体対応型のキャンドモータポンプを示す縦断面側面図である。It is a longitudinal cross-sectional side view which shows the conventional slurry fluid corresponding | compatible canned motor pump. 図３のＢ部拡大図である。It is the B section enlarged view of FIG.

符号の説明Explanation of symbols

１ キャンドモータポンプ
２ ハウジング
３ ポンプ部
４ モータ部
５、５ａ、５ｂ 導入路
６ 液体サイクロン（異物分離部）
７ 分離還流路
８ メカニカルシール
９ 切換弁
１０ インタークーラー（冷却装置）
１１ 内部循環路
１２ シャフト
１３ ロータ
１４ ステータ
１５ 羽根車
１６ 吸込路
１７ 吐出口
１８ 吐出路
１９ フラッシング液循環路
２０ フラッシング液供給装置
２１ 軸受
２２ 吸込口
２３ バイパス路
Ｌ 取扱い液
Ｌ１ 異物の除去された取扱い液
Ｌ２ 異物濃度の高い取扱い液
Ｆ フラッシング液 DESCRIPTION OF SYMBOLS 1 Canned motor pump 2 Housing 3 Pump part 4 Motor part 5, 5a, 5b Introduction path 6 Hydrocyclone (foreign substance separation part)
7 Separation reflux path 8 Mechanical seal 9 Switching valve 10 Intercooler (cooling device)
DESCRIPTION OF SYMBOLS 11 Internal circulation path 12 Shaft 13 Rotor 14 Stator 15 Impeller 16 Suction path 17 Discharge port 18 Discharge path 19 Flushing liquid circulation path 20 Flushing liquid supply device 21 Bearing 22 Suction port 23 Bypass path L Handling liquid L1 Handling from which foreign matter has been removed Liquid L2 Handling liquid with high foreign matter concentration F Flushing liquid

Claims (5)

ポンプ部とモータ部とを連結して一体的にハウジングに収容し、該ハウジングに取扱い液を循環させる内部循環路を内設するキャンドモータポンプにおいて、前記ポンプ部から吐出される取扱い液を流通させる吐出路と前記内部循環路とを連結する導入路と、該導入路に設けられた異物分離部と、該異物分離部と前記ポンプ部に取扱い液を吸込む吸込路または前記吐出路とを連結する分離還流路とを備えたことを特徴とするキャンドモータポンプ。   In a canned motor pump in which a pump unit and a motor unit are connected and integrally accommodated in a housing, and an internal circulation path for circulating the handling liquid is provided in the housing, the handling liquid discharged from the pump unit is circulated. Connecting an introduction path that connects the discharge path and the internal circulation path, a foreign matter separating section provided in the introduction path, and a suction path or the discharge path that sucks the handling liquid into the foreign matter separation section and the pump section A canned motor pump comprising a separation reflux path. 前記導入路に外部からフラッシング液を供給可能とする切換弁を設けた請求項１に記載のキャンドモータポンプ。   The canned motor pump according to claim 1, wherein a switching valve is provided in the introduction path so that flushing liquid can be supplied from the outside. 前記異物分離部が、前記吐出路から前記導入路に導入される取扱い液の吐出圧力によって旋回流を発生させて該取扱い液を遠心分離させる液体サイクロンである請求項１または２に記載のキャンドモータポンプ。   3. The canned motor according to claim 1, wherein the foreign matter separating unit is a liquid cyclone that generates a swirling flow by a discharge pressure of a handling liquid introduced from the discharge path into the introduction path to centrifuge the handling liquid. pump. 前記内部循環路に前記モータ部と前記ポンプ部との間の取扱い液の循環を封止するシールを設け、前記導入路の前記内部循環路との連結位置を前記シールよりも前記モータ部側とした請求項１〜３のいずれかに記載のキャンドモータポンプ。   A seal for sealing the circulation of the handling liquid between the motor unit and the pump unit is provided in the internal circulation path, and the connection position of the introduction path with the internal circulation path is closer to the motor unit than the seal. The canned motor pump according to any one of claims 1 to 3. 前記導入路を冷却する冷却装置を設けた請求項１〜４のいずれかに記載のキャンドモータポンプ。   The canned motor pump in any one of Claims 1-4 which provided the cooling device which cools the said introduction path.
JP2004280793A 2004-09-28 2004-09-28 Canned motor pump Pending JP2006097470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004280793A JP2006097470A (en) 2004-09-28 2004-09-28 Canned motor pump

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Application Number Priority Date Filing Date Title
JP2004280793A JP2006097470A (en) 2004-09-28 2004-09-28 Canned motor pump

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Publication Number Publication Date
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Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109854539A (en) * 2019-03-31 2019-06-07 丹东克隆先锋泵业有限公司 Magnetic drive pump with external cooler
CN113623276A (en) * 2021-09-07 2021-11-09 云南大红山管道有限公司 Machine seal flushing water bearing cooling water supply system of centrifugal pump and control method
KR102345832B1 (en) * 2021-07-22 2021-12-31 (주)한국펌프앤시스템즈 Hybrid type impeller that minimizes foreign matter jamming and submersible/centrifugal pump equipped with the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS506042B1 (en) * 1968-12-28 1975-03-10
JPH06235394A (en) * 1993-02-08 1994-08-23 Ebara Corp Self circulation type canned motor pump
JPH116494A (en) * 1997-06-17 1999-01-12 Mitsubishi Heavy Ind Ltd Bearing damage prevention method and device for non-seal type pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS506042B1 (en) * 1968-12-28 1975-03-10
JPH06235394A (en) * 1993-02-08 1994-08-23 Ebara Corp Self circulation type canned motor pump
JPH116494A (en) * 1997-06-17 1999-01-12 Mitsubishi Heavy Ind Ltd Bearing damage prevention method and device for non-seal type pump

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109854539A (en) * 2019-03-31 2019-06-07 丹东克隆先锋泵业有限公司 Magnetic drive pump with external cooler
KR102345832B1 (en) * 2021-07-22 2021-12-31 (주)한국펌프앤시스템즈 Hybrid type impeller that minimizes foreign matter jamming and submersible/centrifugal pump equipped with the same
CN113623276A (en) * 2021-09-07 2021-11-09 云南大红山管道有限公司 Machine seal flushing water bearing cooling water supply system of centrifugal pump and control method

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