WO2022254781A1 - Underwater motor pump - Google Patents

Underwater motor pump Download PDF

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Publication number
WO2022254781A1
WO2022254781A1 PCT/JP2022/003444 JP2022003444W WO2022254781A1 WO 2022254781 A1 WO2022254781 A1 WO 2022254781A1 JP 2022003444 W JP2022003444 W JP 2022003444W WO 2022254781 A1 WO2022254781 A1 WO 2022254781A1
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WIPO (PCT)
Prior art keywords
case
inverter
pump
mechanical seal
submersible motor
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Application number
PCT/JP2022/003444
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French (fr)
Japanese (ja)
Inventor
和也 平本
隆行 黒沼
洋平 大石
Original Assignee
株式会社荏原製作所
Priority date (The priority date 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 date listed.)
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Application filed by 株式会社荏原製作所 filed Critical 株式会社荏原製作所
Priority to CN202280030260.6A priority Critical patent/CN117203431A/en
Priority to EP22815541.2A priority patent/EP4350147A1/en
Publication of WO2022254781A1 publication Critical patent/WO2022254781A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5813—Cooling the control unit

Definitions

  • the present invention relates to submersible motor pumps. This application claims priority based on Japanese Patent Application No. 2021-094395 filed in Japan on June 4, 2021, the content of which is incorporated herein.
  • Patent Document 1 a submersible motor pump that is installed in a water tank and used in a submerged state in order to drain water such as sewage, wastewater, or river water stored in the water tank.
  • the present invention provides a submersible motor pump that can effectively cool the built-in inverter device.
  • a submersible motor pump has a motor case that houses an electric motor that imparts rotational force to an output shaft, and a discharge pipe that houses a first impeller provided on the output shaft.
  • a pump case and an inverter case accommodating an inverter device for controlling the electric motor are provided, and the inverter case is arranged between the pump case and the motor case.
  • the inverter device may be arranged in contact with the lower partition wall of the inverter case.
  • the inverter device may be arranged apart from the upper and lower partitions of the inverter case.
  • a mechanical seal case containing a mechanical seal portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical seal portion may be arranged between the mechanical seal case and the motor case.
  • a mechanical seal case containing a mechanical seal portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical seal portion may be arranged between the mechanical seal case and the pump case.
  • the output shaft may have a second impeller arranged inside the mechanical seal case and configured to flow the lubricating liquid toward the inverter case.
  • the inverter case accommodates a mechanical seal portion that rotatably seals the output shaft, and a lubricating liquid that lubricates the mechanical seal portion. and the inverter device may be arranged inside the inverter case.
  • the output shaft may have a second impeller arranged inside the inverter case and configured to flow the lubricating fluid toward the inverter case.
  • FIG. 1 is a side view of a submersible motor pump 100 according to the first embodiment. 1 to 4, the vertical direction is indicated by arrow Z, and the horizontal direction by arrow X and arrow Y. As shown in FIG.
  • the submersible motor pump 100 can be applied, for example, to a pump for pumping up water such as sewage, wastewater, or river water.
  • the submersible motor-pump 100 is normally placed on the bottom surface G of a water tank filled with water up to the water level L, and used in a submerged state.
  • the submersible motor pump 100 includes a motor case 10 that houses an electric motor 12 that imparts rotational force to an output shaft 11 , and a pump case 20 that has a discharge pipe 24 and houses a first impeller 21 provided on the output shaft 11 . , and an inverter case 30 that houses an inverter device 31 that controls the electric motor 12 .
  • the electric motor 12 and the inverter device 31 of the submersible motor pump 100 are appropriately connected to a power supply (not shown) via a power cable C passing through the inverter case 30 while maintaining watertightness.
  • the motor case 10 is provided above the pump case 20 . As a result, even if the water level L drops and the motor case 10 is exposed from the surface of the water stored in the water tank, the operation of the submersible motor pump 100 can be continued. Also, the planar dimensions of the submersible motor pump 100 can be made compact. The space between the motor case 10 and the pump case 20 is sealed while the output shaft 11 is rotatably supported.
  • the motor case 10 watertightly houses an electric motor 12 having a rotor and a stator.
  • the electric motor 12 is connected to a power source external to the submersible motor-pump 100 .
  • the electric motor 12 is connected to an inverter device 31 .
  • the stator gives rotational force to the rotor by electromagnetic action.
  • the rotor is mechanically connected to the output shaft 11 provided with the first impeller 21 , and the rotational force of the rotor is transmitted to the output shaft 11 .
  • the space between the motor case 10 and the pump case 20 is sealed while the output shaft 11 is freely rotatably supported.
  • the pump case 20 is placed on the bottom surface G of the water tank in order to operate the submersible motor pump 100 by acting on the water stored in the water tank even when the water level L of the water stored in the water tank becomes low.
  • the pump case 20 has a discharge pipe 24 and a suction port 22 .
  • a first impeller 21 provided on the output shaft 11 is accommodated in the internal space of the pump case 20 .
  • the pump case 20 is immersed in water stored in a water tank and supported via legs 23 in contact with the bottom surface G of the water tank.
  • the pump case 20 sucks water from the suction port 22 into the internal space of the pump case 20 by the energy given by the first impeller 21 , and discharges the water in the internal space to the discharge pipe 24 .
  • the discharge pipe 24 is a pipe that discharges water in the internal space of the pump case 20 .
  • the discharge pipe 24 has one end open to the pump case 20 and the other end connected to a main pipe (not shown) through which the sucked water passes.
  • the suction port 22 is an opening for sucking water stored in the water tank.
  • the suction port 22 faces downward.
  • the inverter case 30 accommodates the inverter device 31 inside.
  • the inverter device 31 has, for example, a board, an inverter circuit mounted on the board, a power supply circuit mounted on the board, a capacitor mounted on the board, and the like.
  • the inverter case 30 is arranged between the pump case 20 and the motor case 10 . That is, the pump case 20 is placed on the bottom surface G of the water tank, the inverter case 30 is arranged above the pump case 20 , and the motor case 10 is arranged above the inverter case 30 .
  • the flow of water inside the pump case 20 caused by the first impeller 21 can exchange heat with the upper partition wall of the pump case 20 , so that the inverter case 30 arranged above the pump case 20 can be cooled. Therefore, the inverter device 31 built in the submersible motor pump 100 can be effectively cooled. Also, since the distance between the inverter device 31 and the electric motor 12 can be shortened, the electrical wiring between the two can be shortened. Therefore, the structure of the submersible motor pump 100 can be made compact.
  • the submersible motor pump 100 may also include a mechanical seal case 40 that houses a mechanical seal portion 41 that rotatably seals the output shaft 11 and a lubricant 42 that lubricates the mechanical seal portion 41 .
  • the mechanical seal portion 41 may be a slide bearing.
  • the mechanical seal portion 41 may be, for example, a synthetic resin bush.
  • the lubricating liquid 42 lubricates the gap between the mechanical seal portion 41 and the output shaft 11 . Thereby, abrasion and overheating of the mechanical seal portion 41 can be suppressed while maintaining the seal between the motor case 10 and the pump case 20 .
  • Lubricating liquid 42 preferably fills the inside of mechanical seal case 40 .
  • the lubricating liquid 42 may be, for example, turbine oil or liquid resin having insulating properties.
  • the inverter case 30 may be arranged between the mechanical seal case 40 and the motor case 10 .
  • the space between the electric motor 12 and the pump case 20 can be sealed while the output shaft 11 is rotatably supported, and water flowing inside the pump case 20 and the inverter device 31 housed in the inverter case 30 can be sealed.
  • the output shaft 11 may have a second impeller 43 that is arranged inside the mechanical seal case 40 and flows the lubricating liquid 42 toward the inverter case 30 .
  • the lubricating fluid 42 flown toward the inverter device 31 by the second impeller 43 exchanges heat with the lower partition wall 30 ⁇ /b>D of the inverter case 30 . Therefore, the rotation of the output shaft 11 can be used to effectively cool the inverter device 31 housed in the inverter case 30 .
  • FIG. 2 is a side view of the submersible motor pump 200 according to the second embodiment. Note that descriptions of matters common to the submersible motor pump 100 according to the first embodiment may be omitted.
  • the submersible motor pump 200 includes a mechanical seal portion 41 that rotatably seals the output shaft 11 and a lubricating liquid that lubricates the mechanical seal portion 41. 42 and a mechanical seal case 40 that houses the .
  • the inverter case 30 may be arranged between the mechanical seal case 40 and the pump case 20 .
  • the space between the electric motor 12 and the pump case 20 can be sealed while the output shaft 11 is rotatably supported, and water flowing inside the pump case 20 and the inverter device 31 housed in the inverter case 30 can be sealed.
  • the lubricant 42 and the water flowing inside the pump case 20 can cool the inverter case 30 from above and below. Therefore, the inverter device 31 can be effectively cooled.
  • FIG. 3 is a side view of a submersible motor pump 300 according to the third embodiment. Note that descriptions of matters common to the submersible motor-pump 100 according to the first embodiment or the submersible motor-pump 200 according to the second embodiment may be omitted.
  • the submersible motor pump 300 according to the third embodiment includes an inverter case 30 that also functions as the mechanical seal case 40. ing. That is, the inverter case 30 of the submersible motor pump 300 according to the third embodiment accommodates a mechanical seal portion 41 that rotatably seals the output shaft 11 and a lubricant 42 that lubricates the mechanical seal portion 41. .
  • the inverter device 31 is arranged inside the inverter case 30 . As a result, the inverter device 31 can directly contact the lubricating liquid 42 to exchange heat, so that the inverter device 31 can be effectively cooled.
  • the inverter device 31 may be arranged in contact with the lower partition wall 30 ⁇ /b>D of the inverter case 30 . This facilitates heat exchange between the inverter device 31 and the water inside the pump case 20 .
  • the inverter device 31 can be effectively cooled.
  • FIG. 4 is a side view of a submersible motor pump 400 according to the fourth embodiment. Note that descriptions of matters common to the submersible motor-pump 100 according to the first embodiment to the submersible motor-pump 300 according to the third embodiment may be omitted.
  • a submersible motor-pump 400 according to the fourth embodiment includes an inverter case 30 that also functions as the mechanical seal case 40, like the submersible motor-pump 300 according to the third embodiment.
  • the inverter device 31 may be arranged apart from the upper partition 30U and the lower partition 30D of the inverter case 30 .
  • the lubricating fluid 42 can circulate above and below the inverter device 31, so heat exchange between the inverter device 31 and the lubricating fluid 42 can be facilitated. Therefore, the inverter device 31 can be effectively cooled.
  • the lubricating liquid 42 can be stirred and the heat dissipation of the inverter device 31 can be promoted, thereby cooling the inverter device 31. can contribute to Note that the submersible motor pump 400 according to each embodiment may not have the second impeller 43 .
  • the submersible motor pump 400 the submersible motor pump 100 according to the first embodiment shown in FIG. 1 or the submersible motor pump 200 according to the second embodiment shown in FIG.
  • the vertical dimension (height) can be shortened by the amount of not having a partition wall that separates the inverter case 30 and the mechanical seal case 40 . Therefore, the structure of the submersible motor pumps 300, 400 can be made compact.
  • a submersible motor pump 100 has a motor case 10 that houses an electric motor 12 that imparts rotational force to an output shaft 11, a discharge pipe 24, and houses a first impeller 21 provided on the output shaft 11. and an inverter case 30 that houses an inverter device 31 that controls the electric motor 12 .
  • Inverter case 30 is arranged between pump case 20 and motor case 10 .
  • the flow of water inside the pump case 20 caused by the first impeller 21 can exchange heat with the upper partition wall of the pump case 20 , so that the inverter case 30 arranged above the pump case 20 can be cooled. Therefore, the inverter device 31 built in the submersible motor pump 100 can be effectively cooled.
  • the electrical wiring between the two can be shortened. Therefore, the structure of the submersible motor pump 100 can be made compact.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

An underwater motor pump (100) comprises: a motor case (10) accommodating an electric motor (12) that imparts a rotational force to an output shaft (11); a pump case (20) which has a discharge pipe (24), and which accommodates a first impeller (21) provided on the output shaft; and an inverter case (30) accommodating an inverter device (31) for controlling the electric motor. The inverter case (30) is disposed between the pump case (20) and the motor case (10).

Description

水中モータポンプsubmersible motor pump
　本発明は、水中モータポンプに関する。
　本願は、２０２１年６月４日に日本に出願された特願２０２１－０９４３９５号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to submersible motor pumps.
This application claims priority based on Japanese Patent Application No. 2021-094395 filed in Japan on June 4, 2021, the content of which is incorporated herein.
　従来、水槽に貯留した汚水、排水、又は河川水等の水を排水するため、水槽内に設置されて水に浸かった状態で使用される水中モータポンプがあった（特許文献１）。 Conventionally, there has been a submersible motor pump that is installed in a water tank and used in a submerged state in order to drain water such as sewage, wastewater, or river water stored in the water tank (Patent Document 1).
日本国特開２０１９－１５２０４号公報Japanese Patent Application Laid-Open No. 2019-15204
　しかしながら、従来の水中モータポンプは、制御ユニットの冷却に改善の余地があった。 However, conventional submersible motor pumps had room for improvement in cooling the control unit.
　本発明では、内蔵したインバータ装置を効果的に冷却できる水中モータポンプを提供する。 The present invention provides a submersible motor pump that can effectively cool the built-in inverter device.
　本発明は、以下の態様を有する。
（１）本発明に係る一態様の水中モータポンプは、出力軸に回転力を与える電動モータを収容するモータケースと、吐出配管を有し、前記出力軸に設けられた第１インペラを収容するポンプケースと、前記電動モータを制御するインバータ装置を収容するインバータケースと、を備え、前記インバータケースは、前記ポンプケースと前記モータケースとの間に配置される。
（２）上記（１）の態様において、前記インバータ装置は、前記インバータケースの下部隔壁に接して配置されてよい。
（３）上記（１）の態様において、前記インバータ装置は、前記インバータケースの上部隔壁及び下部隔壁から離間して配置されてよい。
（４）上記（１）から（３）のいずれかの態様において、前記出力軸を回転自在にシールするメカニカルシール部と、前記メカニカルシール部を潤滑する潤滑液と、を収容するメカニカルシールケースを備え、前記インバータケースは、前記メカニカルシールケースと前記モータケースとの間に配置されてよい。
（５）上記（１）から（３）のいずれかの態様において、前記出力軸を回転自在にシールするメカニカルシール部と、前記メカニカルシール部を潤滑する潤滑液と、を収容するメカニカルシールケースを備え、前記インバータケースは、前記メカニカルシールケースと前記ポンプケースとの間に配置されてよい。
（６）上記（４）又は（５）の態様において、前記出力軸は、前記メカニカルシールケースの内側に配置され、前記潤滑液を前記インバータケースに向けて流す第２インペラを有してよい。
（７）上記（１）から（３）のいずれかの態様において、前記インバータケースは、前記出力軸を回転自在にシールするメカニカルシール部と、前記メカニカルシール部を潤滑する潤滑液と、を収容し、前記インバータ装置は、前記インバータケースの内側に配置されてよい。
（８）上記（７）の態様において、前記出力軸は、前記インバータケースの内側に配置され、前記潤滑液を前記インバータケースに向けて流す第２インペラを有してよい。 The present invention has the following aspects.
(1) A submersible motor pump according to one aspect of the present invention has a motor case that houses an electric motor that imparts rotational force to an output shaft, and a discharge pipe that houses a first impeller provided on the output shaft. A pump case and an inverter case accommodating an inverter device for controlling the electric motor are provided, and the inverter case is arranged between the pump case and the motor case.
(2) In the above aspect (1), the inverter device may be arranged in contact with the lower partition wall of the inverter case.
(3) In the aspect of (1) above, the inverter device may be arranged apart from the upper and lower partitions of the inverter case.
(4) In any one of the aspects (1) to (3) above, a mechanical seal case containing a mechanical seal portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical seal portion. The inverter case may be arranged between the mechanical seal case and the motor case.
(5) In any one of the above (1) to (3), a mechanical seal case containing a mechanical seal portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical seal portion. The inverter case may be arranged between the mechanical seal case and the pump case.
(6) In the aspect (4) or (5) above, the output shaft may have a second impeller arranged inside the mechanical seal case and configured to flow the lubricating liquid toward the inverter case.
(7) In any one of the above (1) to (3), the inverter case accommodates a mechanical seal portion that rotatably seals the output shaft, and a lubricating liquid that lubricates the mechanical seal portion. and the inverter device may be arranged inside the inverter case.
(8) In the aspect of (7) above, the output shaft may have a second impeller arranged inside the inverter case and configured to flow the lubricating fluid toward the inverter case.
　本発明によれば、内蔵したインバータ装置を効果的に冷却できる水中モータポンプを提供できる。 According to the present invention, it is possible to provide a submersible motor pump that can effectively cool the built-in inverter device.
第１実施形態に係る水中モータポンプの側面図である。It is a side view of a submersible motor pump concerning a 1st embodiment. 第２実施形態に係る水中モータポンプの側面図である。It is a side view of the submersible motor pump which concerns on 2nd Embodiment. 第３実施形態に係る水中モータポンプの側面図である。It is a side view of the submersible motor pump which concerns on 3rd Embodiment. 第４実施形態に係る水中モータポンプの側面図である。It is a side view of the submersible motor pump which concerns on 4th Embodiment.
（第１実施形態）
　以下、第１実施形態に係る水中モータポンプ１００を説明する。図１は、第１実施形態に係る水中モータポンプ１００の側面図である。なお、図１から図４において、鉛直方向を矢印Ｚ、水平方向を矢印Ｘ及び矢印Ｙで示す。 (First embodiment)
The submersible motor pump 100 according to the first embodiment will be described below. FIG. 1 is a side view of a submersible motor pump 100 according to the first embodiment. 1 to 4, the vertical direction is indicated by arrow Z, and the horizontal direction by arrow X and arrow Y. As shown in FIG.
　図１に示すように、第１実施形態に係る水中モータポンプ１００は、例えば、汚水、排水、又は、河川水等の水を汲み上げるポンプに適用できる。水中モータポンプ１００は、通常、水が水位Ｌまで貯められた水槽の底面Ｇに載置され、水中に浸かった状態で用いられる。 As shown in FIG. 1, the submersible motor pump 100 according to the first embodiment can be applied, for example, to a pump for pumping up water such as sewage, wastewater, or river water. The submersible motor-pump 100 is normally placed on the bottom surface G of a water tank filled with water up to the water level L, and used in a submerged state.
　水中モータポンプ１００は、出力軸１１に回転力を与える電動モータ１２を収容するモータケース１０と、吐出配管２４を有し、出力軸１１に設けられた第１インペラ２１を収容するポンプケース２０と、電動モータ１２を制御するインバータ装置３１を収容するインバータケース３０と、を備えている。なお、水中モータポンプ１００の電動モータ１２及びインバータ装置３１は、適宜、水密性を保ってインバータケース３０を貫通する電源ケーブルＣを介して不図示の電源に接続されている。 The submersible motor pump 100 includes a motor case 10 that houses an electric motor 12 that imparts rotational force to an output shaft 11 , and a pump case 20 that has a discharge pipe 24 and houses a first impeller 21 provided on the output shaft 11 . , and an inverter case 30 that houses an inverter device 31 that controls the electric motor 12 . The electric motor 12 and the inverter device 31 of the submersible motor pump 100 are appropriately connected to a power supply (not shown) via a power cable C passing through the inverter case 30 while maintaining watertightness.
　モータケース１０は、ポンプケース２０の上方に設けられている。これにより、水位Ｌが低下してモータケース１０が水槽に貯められた水の水面から露出しても、水中モータポンプ１００の運転を継続できる。また、水中モータポンプ１００の平面寸法をコンパクトにできる。
　モータケース１０とポンプケース２０との間は、出力軸１１を回転自由に軸支した状態でシールされている。 The motor case 10 is provided above the pump case 20 . As a result, even if the water level L drops and the motor case 10 is exposed from the surface of the water stored in the water tank, the operation of the submersible motor pump 100 can be continued. Also, the planar dimensions of the submersible motor pump 100 can be made compact.
The space between the motor case 10 and the pump case 20 is sealed while the output shaft 11 is rotatably supported.
　モータケース１０は、ロータ及びステータを有する電動モータ１２を水密的に収容している。電動モータ１２は、水中モータポンプ１００の外部にある電源に接続されている。また、電動モータ１２は、インバータ装置３１に接続されている。ステータは、電磁気学的な作用により、ロータに回転力を与える。ロータは、第１インペラ２１が設けられた出力軸１１と機械的に連結されており、ロータの回転力は出力軸１１に伝達される。 The motor case 10 watertightly houses an electric motor 12 having a rotor and a stator. The electric motor 12 is connected to a power source external to the submersible motor-pump 100 . Also, the electric motor 12 is connected to an inverter device 31 . The stator gives rotational force to the rotor by electromagnetic action. The rotor is mechanically connected to the output shaft 11 provided with the first impeller 21 , and the rotational force of the rotor is transmitted to the output shaft 11 .
　モータケース１０とポンプケース２０との間は、出力軸１１を回転自由に軸支した状態でシールされている。 The space between the motor case 10 and the pump case 20 is sealed while the output shaft 11 is freely rotatably supported.
　ポンプケース２０は、水槽内に貯められた水の水位Ｌが低くなっても、水槽に貯められた水に作用して、水中モータポンプ１００を機能させるため、水槽の底面Ｇに載置されている。
　ポンプケース２０は、吐出配管２４と、吸込口２２と、を有している。ポンプケース２０の内部空間には、出力軸１１に設けられた第１インペラ２１が収容されている。ポンプケース２０は、水槽に貯められた水に浸かっており、水槽の底面Ｇに接する脚部２３を介して支持されている。ポンプケース２０は、第１インペラ２１によって与えられたエネルギーにより、吸込口２２からポンプケース２０の内部空間へ水を吸い込み、吸い込まれた内部空間の水を吐出配管２４に吐出する。 The pump case 20 is placed on the bottom surface G of the water tank in order to operate the submersible motor pump 100 by acting on the water stored in the water tank even when the water level L of the water stored in the water tank becomes low. there is
The pump case 20 has a discharge pipe 24 and a suction port 22 . A first impeller 21 provided on the output shaft 11 is accommodated in the internal space of the pump case 20 . The pump case 20 is immersed in water stored in a water tank and supported via legs 23 in contact with the bottom surface G of the water tank. The pump case 20 sucks water from the suction port 22 into the internal space of the pump case 20 by the energy given by the first impeller 21 , and discharges the water in the internal space to the discharge pipe 24 .
　吐出配管２４は、ポンプケース２０の内部空間の水を吐出する管である。吐出配管２４は、一端をポンプケース２０に開口し、他端を吸引した水を通す主配管（不図示）に接続している。 The discharge pipe 24 is a pipe that discharges water in the internal space of the pump case 20 . The discharge pipe 24 has one end open to the pump case 20 and the other end connected to a main pipe (not shown) through which the sucked water passes.
　吸込口２２は、水槽に貯められた水を吸い込む開口部である。吸込口２２は、下方に向いている。 The suction port 22 is an opening for sucking water stored in the water tank. The suction port 22 faces downward.
　インバータケース３０は、内部に、インバータ装置３１を収容している。 The inverter case 30 accommodates the inverter device 31 inside.
　インバータ装置３１は、例えば、基板と、基板に搭載されたインバータ回路と、基板に搭載された電源回路と、基板に搭載されたコンデンサ等を有している。 The inverter device 31 has, for example, a board, an inverter circuit mounted on the board, a power supply circuit mounted on the board, a capacitor mounted on the board, and the like.
　ここで、インバータケース３０は、ポンプケース２０とモータケース１０との間に配置されている。すなわち、水槽の底面Ｇの上にポンプケース２０が載置され、そのポンプケース２０の上方にインバータケース３０が配置され、インバータケース３０の上方にモータケース１０が配置されている。これにより、第１インペラ２１によるポンプケース２０の内側の水の流れで、ポンプケース２０の上部の隔壁と熱交換できるので、ポンプケース２０の上方に配置されたインバータケース３０を冷却できる。よって、水中モータポンプ１００に内蔵したインバータ装置３１を効果的に冷却できる。また、インバータ装置３１と電動モータ１２との距離を短くできるので、両者の電気配線を短くできる。よって、水中モータポンプ１００の構造をコンパクトにできる。 Here, the inverter case 30 is arranged between the pump case 20 and the motor case 10 . That is, the pump case 20 is placed on the bottom surface G of the water tank, the inverter case 30 is arranged above the pump case 20 , and the motor case 10 is arranged above the inverter case 30 . As a result, the flow of water inside the pump case 20 caused by the first impeller 21 can exchange heat with the upper partition wall of the pump case 20 , so that the inverter case 30 arranged above the pump case 20 can be cooled. Therefore, the inverter device 31 built in the submersible motor pump 100 can be effectively cooled. Also, since the distance between the inverter device 31 and the electric motor 12 can be shortened, the electrical wiring between the two can be shortened. Therefore, the structure of the submersible motor pump 100 can be made compact.
　また、水中モータポンプ１００は、出力軸１１を回転自在にシールするメカニカルシール部４１と、メカニカルシール部４１を潤滑する潤滑液４２と、を収容するメカニカルシールケース４０を備えていてよい。メカニカルシール部４１は、すべり軸受であってよい。メカニカルシール部４１は、例えば、合成樹脂製のブッシュであってよい。潤滑液４２は、メカニカルシール部４１と出力軸１１との隙間を潤滑する。これにより、モータケース１０とポンプケース２０との間のシールを維持しつつ、メカニカルシール部４１の摩耗及び過熱を抑制できる。潤滑液４２は、メカニカルシールケース４０の内側に満たされていることが好ましい。なお、潤滑液４２は、例えば、タービンオイルであってよく、絶縁性を有する液状の樹脂であってよい。 The submersible motor pump 100 may also include a mechanical seal case 40 that houses a mechanical seal portion 41 that rotatably seals the output shaft 11 and a lubricant 42 that lubricates the mechanical seal portion 41 . The mechanical seal portion 41 may be a slide bearing. The mechanical seal portion 41 may be, for example, a synthetic resin bush. The lubricating liquid 42 lubricates the gap between the mechanical seal portion 41 and the output shaft 11 . Thereby, abrasion and overheating of the mechanical seal portion 41 can be suppressed while maintaining the seal between the motor case 10 and the pump case 20 . Lubricating liquid 42 preferably fills the inside of mechanical seal case 40 . Note that the lubricating liquid 42 may be, for example, turbine oil or liquid resin having insulating properties.
　インバータケース３０は、メカニカルシールケース４０とモータケース１０との間に配置されていてよい。これにより、出力軸１１を回転自由に軸支した状態で電動モータ１２とポンプケース２０との間をシールできるとともに、ポンプケース２０の内側を流れる水とインバータケース３０に収容されたインバータ装置３１とを、インバータケース３０に収容された潤滑液４２を介して熱交換できる。よって、インバータ装置３１を効果的に冷却できる。 The inverter case 30 may be arranged between the mechanical seal case 40 and the motor case 10 . As a result, the space between the electric motor 12 and the pump case 20 can be sealed while the output shaft 11 is rotatably supported, and water flowing inside the pump case 20 and the inverter device 31 housed in the inverter case 30 can be sealed. can be heat-exchanged via the lubricating fluid 42 contained in the inverter case 30 . Therefore, the inverter device 31 can be effectively cooled.
　また、出力軸１１は、メカニカルシールケース４０の内側に配置され、潤滑液４２をインバータケース３０に向けて流す第２インペラ４３を有してよい。これにより、第２インペラ４３によってインバータ装置３１に向けて流された潤滑液４２は、インバータケース３０の下部隔壁３０Ｄと熱交換する。よって、出力軸１１の回転を利用して、インバータケース３０に収容されたインバータ装置３１を効果的に冷却できる。 Further, the output shaft 11 may have a second impeller 43 that is arranged inside the mechanical seal case 40 and flows the lubricating liquid 42 toward the inverter case 30 . As a result, the lubricating fluid 42 flown toward the inverter device 31 by the second impeller 43 exchanges heat with the lower partition wall 30</b>D of the inverter case 30 . Therefore, the rotation of the output shaft 11 can be used to effectively cool the inverter device 31 housed in the inverter case 30 .
（第２実施形態）
　次に、第２実施形態に係る水中モータポンプ２００を説明する。図２は、第２実施形態に係る水中モータポンプ２００の側面図である。なお、第１実施形態に係る水中モータポンプ１００と共通する事項については、説明を省略する場合がある。 (Second embodiment)
Next, a submersible motor pump 200 according to a second embodiment will be described. FIG. 2 is a side view of the submersible motor pump 200 according to the second embodiment. Note that descriptions of matters common to the submersible motor pump 100 according to the first embodiment may be omitted.
　第２実施形態に係る水中モータポンプ２００は、第１実施形態に係る水中モータポンプ１００と同様に、出力軸１１を回転自在にシールするメカニカルシール部４１と、メカニカルシール部４１を潤滑する潤滑液４２と、を収容するメカニカルシールケース４０を備えていてよい。 As with the submersible motor pump 100 according to the first embodiment, the submersible motor pump 200 according to the second embodiment includes a mechanical seal portion 41 that rotatably seals the output shaft 11 and a lubricating liquid that lubricates the mechanical seal portion 41. 42 and a mechanical seal case 40 that houses the .
　ここで、インバータケース３０は、メカニカルシールケース４０とポンプケース２０との間に配置されてよい。これにより、出力軸１１を回転自由に軸支した状態で電動モータ１２とポンプケース２０との間をシールできるとともに、ポンプケース２０の内側を流れる水とインバータケース３０に収容されたインバータ装置３１とをインバータケース３０の下部隔壁３０Ｄを介して熱交換でき、メカニカルシールケース４０に収容された潤滑液４２とインバータケース３０に収容されたインバータ装置３１とをインバータケース３０の上部の隔壁を介して熱交換できる。言い換えると、潤滑液４２及びポンプケース２０の内側を流れる水により、インバータケース３０を上下両側から冷却できる。よって、インバータ装置３１を効果的に冷却できる。 Here, the inverter case 30 may be arranged between the mechanical seal case 40 and the pump case 20 . As a result, the space between the electric motor 12 and the pump case 20 can be sealed while the output shaft 11 is rotatably supported, and water flowing inside the pump case 20 and the inverter device 31 housed in the inverter case 30 can be sealed. can be heat-exchanged through the lower partition wall 30D of the inverter case 30, and the lubricant 42 accommodated in the mechanical seal case 40 and the inverter device 31 accommodated in the inverter case 30 can be heat-exchanged through the upper partition wall of the inverter case 30. can be exchanged. In other words, the lubricant 42 and the water flowing inside the pump case 20 can cool the inverter case 30 from above and below. Therefore, the inverter device 31 can be effectively cooled.
（第３実施形態）
　次に、第３実施形態に係る水中モータポンプ３００を説明する。図３は、第３実施形態に係る水中モータポンプ３００の側面図である。なお、第１実施形態に係る水中モータポンプ１００又は第２実施形態に係る水中モータポンプ２００と共通する事項については、説明を省略する場合がある。 (Third Embodiment)
Next, a submersible motor pump 300 according to a third embodiment will be described. FIG. 3 is a side view of a submersible motor pump 300 according to the third embodiment. Note that descriptions of matters common to the submersible motor-pump 100 according to the first embodiment or the submersible motor-pump 200 according to the second embodiment may be omitted.
　第３実施形態に係る水中モータポンプ３００は、第１実施形態に係る水中モータポンプ１００又は第２実施形態に係る水中モータポンプ２００と異なり、メカニカルシールケース４０の機能を兼ねたインバータケース３０を備えている。
　すなわち、第３実施形態に係る水中モータポンプ３００のインバータケース３０は、出力軸１１を回転自在にシールするメカニカルシール部４１と、メカニカルシール部４１を潤滑する潤滑液４２と、を収容している。インバータ装置３１は、インバータケース３０の内側に配置されている。これにより、インバータ装置３１は、潤滑液４２に直接的に接触して熱交換できるので、インバータ装置３１を効果的に冷却できる。 Unlike the submersible motor pump 100 according to the first embodiment or the submersible motor pump 200 according to the second embodiment, the submersible motor pump 300 according to the third embodiment includes an inverter case 30 that also functions as the mechanical seal case 40. ing.
That is, the inverter case 30 of the submersible motor pump 300 according to the third embodiment accommodates a mechanical seal portion 41 that rotatably seals the output shaft 11 and a lubricant 42 that lubricates the mechanical seal portion 41. . The inverter device 31 is arranged inside the inverter case 30 . As a result, the inverter device 31 can directly contact the lubricating liquid 42 to exchange heat, so that the inverter device 31 can be effectively cooled.
　ここで、インバータ装置３１は、インバータケース３０の下部隔壁３０Ｄに接して配置されていてよい。これにより、インバータ装置３１とポンプケース２０の内側の水との熱交換をしやすくできる。インバータ装置３１を効果的に冷却できる。 Here, the inverter device 31 may be arranged in contact with the lower partition wall 30</b>D of the inverter case 30 . This facilitates heat exchange between the inverter device 31 and the water inside the pump case 20 . The inverter device 31 can be effectively cooled.
（第４実施形態）
　次に、第４実施形態に係る水中モータポンプ４００を説明する。図４は、第４実施形態に係る水中モータポンプ４００の側面図である。なお、第１実施形態に係る水中モータポンプ１００から第３実施形態に係る水中モータポンプ３００と共通する事項については、説明を省略する場合がある。 (Fourth embodiment)
Next, a submersible motor pump 400 according to a fourth embodiment will be described. FIG. 4 is a side view of a submersible motor pump 400 according to the fourth embodiment. Note that descriptions of matters common to the submersible motor-pump 100 according to the first embodiment to the submersible motor-pump 300 according to the third embodiment may be omitted.
　第４実施形態に係る水中モータポンプ４００は、第３実施形態に係る水中モータポンプ３００と同様に、メカニカルシールケース４０の機能を兼ねたインバータケース３０を備えている。 A submersible motor-pump 400 according to the fourth embodiment includes an inverter case 30 that also functions as the mechanical seal case 40, like the submersible motor-pump 300 according to the third embodiment.
　ここで、インバータ装置３１は、インバータケース３０の上部隔壁３０Ｕ及び下部隔壁３０Ｄから離間して配置されていてよい。これにより、インバータ装置３１の上下に潤滑液４２が循環できるようになるので、インバータ装置３１と潤滑液４２との熱交換をしやすくできる。よって、インバータ装置３１を効果的に冷却できる。
　また、出力軸１１と撹拌羽根（第２インペラ４３）とを、同期させて回転駆動させることにより、潤滑液４２を撹拌してインバータ装置３１の放熱を促進させることができ、インバータ装置３１の冷却に寄与させることができる。
　なお、各実施形態に係る水中モータポンプ４００は、第２インペラ４３を有していなくてもよい。
　また、インバータケース３０及びメカニカルシールケース４０の機能を兼ねて一つのチャンバを有するインバータケース３０にまとめた図３に示す第３実施形態に係る水中モータポンプ３００又は図４に示す第４実施形態に係る水中モータポンプ４００によれば、インバータケース３０及びメカニカルシールケース４０をそれぞれ設けた図１に示す第１実施形態に係る水中モータポンプ１００又は図２に示す第２実施形態に係る水中モータポンプ２００と比べて、インバータケース３０とメカニカルシールケース４０とを区画する隔壁を有さない分、鉛直方向の寸法（高さ）を短くできる。よって、水中モータポンプ３００，４００の構造をコンパクトにできる。 Here, the inverter device 31 may be arranged apart from the upper partition 30U and the lower partition 30D of the inverter case 30 . As a result, the lubricating fluid 42 can circulate above and below the inverter device 31, so heat exchange between the inverter device 31 and the lubricating fluid 42 can be facilitated. Therefore, the inverter device 31 can be effectively cooled.
In addition, by synchronously rotating the output shaft 11 and the stirring blade (second impeller 43), the lubricating liquid 42 can be stirred and the heat dissipation of the inverter device 31 can be promoted, thereby cooling the inverter device 31. can contribute to
Note that the submersible motor pump 400 according to each embodiment may not have the second impeller 43 .
Further, the submersible motor pump 300 according to the third embodiment shown in FIG. 3 or the fourth embodiment shown in FIG. According to the submersible motor pump 400, the submersible motor pump 100 according to the first embodiment shown in FIG. 1 or the submersible motor pump 200 according to the second embodiment shown in FIG. Compared to , the vertical dimension (height) can be shortened by the amount of not having a partition wall that separates the inverter case 30 and the mechanical seal case 40 . Therefore, the structure of the submersible motor pumps 300, 400 can be made compact.
　以上、図面を参照して実施形態について説明したが、本発明は上述のものに限られない。実施形態として挙げられた複数の特徴を、自由に組み合わせてもよい。 Although the embodiments have been described above with reference to the drawings, the present invention is not limited to the above. A plurality of features given as embodiments may be freely combined.
　本実施形態に係る水中モータポンプ１００は、出力軸１１に回転力を与える電動モータ１２を収容するモータケース１０と、吐出配管２４を有し、出力軸１１に設けられた第１インペラ２１を収容するポンプケース２０と、電動モータ１２を制御するインバータ装置３１を収容するインバータケース３０と、を備えている。インバータケース３０は、ポンプケース２０とモータケース１０との間に配置されている。これにより、第１インペラ２１によるポンプケース２０の内側の水の流れで、ポンプケース２０の上部の隔壁と熱交換できるので、ポンプケース２０の上方に配置されたインバータケース３０を冷却できる。よって、水中モータポンプ１００に内蔵したインバータ装置３１を効果的に冷却できる。また、インバータ装置３１と電動モータ１２との距離を短くできるので、両者の電気配線を短くできる。よって、水中モータポンプ１００の構造をコンパクトにできる。 A submersible motor pump 100 according to this embodiment has a motor case 10 that houses an electric motor 12 that imparts rotational force to an output shaft 11, a discharge pipe 24, and houses a first impeller 21 provided on the output shaft 11. and an inverter case 30 that houses an inverter device 31 that controls the electric motor 12 . Inverter case 30 is arranged between pump case 20 and motor case 10 . As a result, the flow of water inside the pump case 20 caused by the first impeller 21 can exchange heat with the upper partition wall of the pump case 20 , so that the inverter case 30 arranged above the pump case 20 can be cooled. Therefore, the inverter device 31 built in the submersible motor pump 100 can be effectively cooled. Also, since the distance between the inverter device 31 and the electric motor 12 can be shortened, the electrical wiring between the two can be shortened. Therefore, the structure of the submersible motor pump 100 can be made compact.
１０　　モータケース
１１　　出力軸
１２　　電動モータ
２０　　ポンプケース
２１　　第１インペラ
２２　　吸込口
２３　　脚部
２４　　吐出配管
３０　　インバータケース
３０Ｄ　下部隔壁
３０Ｕ　上部隔壁
３１　　インバータ装置
４０　　メカニカルシールケース
４１　　メカニカルシール部
４２　　潤滑液
４３　　第２インペラ
１００，２００，３００，４００　水中モータポンプ
Ｃ　　　電源ケーブル
Ｇ　　　底面
Ｌ　　　水位 10 Motor case 11 Output shaft 12 Electric motor 20 Pump case 21 First impeller 22 Suction port 23 Leg 24 Discharge pipe 30 Inverter case 30D Lower partition 30U Upper partition 31 Inverter device 40 Mechanical seal case 41 Mechanical seal 42 Lubricant 43 2 Impeller 100, 200, 300, 400 Submersible motor pump C Power cable G Bottom L Water level

Claims (8)

  1. 　出力軸に回転力を与える電動モータを収容するモータケースと、
    　吐出配管を有し、前記出力軸に設けられた第１インペラを収容するポンプケースと、
    　前記電動モータを制御するインバータ装置を収容するインバータケースと、を備え、
    　前記インバータケースは、前記ポンプケースと前記モータケースとの間に配置される、
    水中モータポンプ。     a motor case housing an electric motor that imparts rotational force to an output shaft;
    a pump case having a discharge pipe and housing a first impeller provided on the output shaft;
    an inverter case that houses an inverter device that controls the electric motor,
    The inverter case is arranged between the pump case and the motor case,
    Submersible motor pump.
  2. 　前記インバータ装置は、前記インバータケースの下部隔壁に接して配置されている、
    請求項１に記載の水中モータポンプ。     The inverter device is arranged in contact with a lower partition of the inverter case,
    A submersible motor pump according to claim 1.
  3. 　前記インバータ装置は、前記インバータケースの上部隔壁及び下部隔壁から離間して配置されている、
    請求項１に記載の水中モータポンプ。     The inverter device is arranged apart from an upper partition wall and a lower partition wall of the inverter case,
    A submersible motor pump according to claim 1.
  4. 　前記出力軸を回転自在にシールするメカニカルシール部と、前記メカニカルシール部を潤滑する潤滑液と、を収容するメカニカルシールケースを備え、
    　前記インバータケースは、前記メカニカルシールケースと前記モータケースとの間に配置される、
    請求項１から請求項３のいずれか１項に記載の水中モータポンプ。     a mechanical seal case that houses a mechanical seal portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical seal portion;
    The inverter case is arranged between the mechanical seal case and the motor case,
    A submersible motor pump according to any one of claims 1 to 3.
  5. 　前記出力軸を回転自在にシールするメカニカルシール部と、前記メカニカルシール部を潤滑する潤滑液と、を収容するメカニカルシールケースを備え、
    　前記インバータケースは、前記メカニカルシールケースと前記ポンプケースとの間に配置される、
    請求項１から請求項３のいずれか１項に記載の水中モータポンプ。     a mechanical seal case that houses a mechanical seal portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical seal portion;
    The inverter case is arranged between the mechanical seal case and the pump case,
    A submersible motor pump according to any one of claims 1 to 3.
  6. 　前記出力軸は、前記メカニカルシールケースの内側に配置され、前記潤滑液を前記インバータケースに向けて流す第２インペラを有する、
    請求項４又は請求項５に記載の水中モータポンプ。     The output shaft has a second impeller arranged inside the mechanical seal case and flowing the lubricating liquid toward the inverter case,
    The submersible motor pump according to claim 4 or 5.
  7. 　前記インバータケースは、前記出力軸を回転自在にシールするメカニカルシール部と、前記メカニカルシール部を潤滑する潤滑液と、を収容し、
    　前記インバータ装置は、前記インバータケースの内側に配置される、
    請求項１から請求項３のいずれか１項に記載の水中モータポンプ。     The inverter case accommodates a mechanical seal portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical seal portion,
    The inverter device is arranged inside the inverter case,
    A submersible motor pump according to any one of claims 1 to 3.
  8. 　前記出力軸は、前記インバータケースの内側に配置され、前記潤滑液を前記インバータケースに向けて流す第２インペラを有する、
    請求項７に記載の水中モータポンプ。     The output shaft has a second impeller arranged inside the inverter case and flowing the lubricating liquid toward the inverter case,
    A submersible motor pump according to claim 7.
PCT/JP2022/003444 2021-06-04 2022-01-28 Underwater motor pump WO2022254781A1 (en)

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CN202280030260.6A CN117203431A (en) 2021-06-04 2022-01-28 Submersible motor pump
EP22815541.2A EP4350147A1 (en) 2021-06-04 2022-01-28 Underwater motor pump

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JP2021094395A JP2022186259A (en) 2021-06-04 2021-06-04 submersible motor pump
JP2021-094395 2021-06-04

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06500614A (en) * 1991-06-22 1994-01-20 アルフレッド・テヴェス・ゲーエムベーハー Hydraulic pump driven by electric motor
JP2000073962A (en) * 1998-06-18 2000-03-07 Asmo Co Ltd Fluid pump device
JP2012207550A (en) * 2011-03-29 2012-10-25 Terada Pump Seisakusho:Kk Oil lifter device for lubricating sliding surface in shaft sealing device in oil chamber of submerged pump
JP2015025429A (en) * 2013-07-29 2015-02-05 新明和工業株式会社 Submersible motor pump
JP2019015204A (en) 2017-07-05 2019-01-31 株式会社荏原製作所 Submersible pump device
JP2021094395A (en) 2019-12-12 2021-06-24 ヴォルヴィック インコーポレイテッドＶｏｌｖｉｋ Ｉｎｃ． Color golf ball with natural metallic luster

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06500614A (en) * 1991-06-22 1994-01-20 アルフレッド・テヴェス・ゲーエムベーハー Hydraulic pump driven by electric motor
JP2000073962A (en) * 1998-06-18 2000-03-07 Asmo Co Ltd Fluid pump device
JP2012207550A (en) * 2011-03-29 2012-10-25 Terada Pump Seisakusho:Kk Oil lifter device for lubricating sliding surface in shaft sealing device in oil chamber of submerged pump
JP2015025429A (en) * 2013-07-29 2015-02-05 新明和工業株式会社 Submersible motor pump
JP2019015204A (en) 2017-07-05 2019-01-31 株式会社荏原製作所 Submersible pump device
JP2021094395A (en) 2019-12-12 2021-06-24 ヴォルヴィック インコーポレイテッドＶｏｌｖｉｋ Ｉｎｃ． Color golf ball with natural metallic luster

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EP4350147A1 (en) 2024-04-10
JP2022186259A (en) 2022-12-15

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