EP4350147A1 - Underwater motor pump - Google Patents
Underwater motor pump Download PDFInfo
- Publication number
- EP4350147A1 EP4350147A1 EP22815541.2A EP22815541A EP4350147A1 EP 4350147 A1 EP4350147 A1 EP 4350147A1 EP 22815541 A EP22815541 A EP 22815541A EP 4350147 A1 EP4350147 A1 EP 4350147A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- case
- inverter
- pump
- underwater motor
- output shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007788 liquid Substances 0.000 claims description 27
- 230000001050 lubricating effect Effects 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 24
- 238000005192 partition Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 39
- 238000001816 cooling Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000009429 electrical wiring Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000010723 turbine oil Substances 0.000 description 1
Images
Classifications
-
- 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 an underwater motor pump.
- Patent Document 1 there has been an underwater motor pump that is installed in a water tank and used in a submerged state in water in order to discharge water such as wastewater, drainage, or river water stored in the water tank.
- Patent Document 1 Japanese Unexamined Patent Application, First Publication No. 2019-15204
- the present invention provides an underwater motor pump capable of effectively cooling a built-in inverter device.
- the present invention has the following aspects.
- an underwater motor pump capable of effectively cooling a built-in inverter device.
- FIG. 1 is a side view of the underwater motor pump 100 according to the first embodiment.
- a vertical direction is indicated by an arrow Z
- a horizontal direction is indicated by an arrow X and an arrow Y.
- the underwater motor pump 100 can be applied to, for example, a pump that pumps up water such as wastewater, drainage, or river water.
- the underwater motor pump 100 is typically placed on a bottom surface G of a water tank in which water is stored up to a water level L, and is used in a submerged state in the water.
- the underwater motor pump 100 includes a motor case 10 that accommodates an electric motor 12 which supplies a rotational force to an output shaft 11, a pump case 20 that includes a discharge pipe 24 and that accommodates a first impeller 21 provided on the output shaft 11, and an inverter case 30 that accommodates an inverter device 31 which controls the electric motor 12.
- the electric motor 12 and the inverter device 31 of the underwater motor pump 100 are appropriately connected to a power source (not shown) via a power cable C that penetrates the inverter case 30 while maintaining water tightness.
- the motor case 10 is provided above the pump case 20. As a result, even in a case where the water level L decreases and the motor case 10 is exposed above the water surface of the water stored in the water tank, the operation of the underwater motor pump 100 can continue. In addition, the planar dimension of the underwater motor pump 100 can be made compact.
- the motor case 10 and the pump case 20 are sealed in a state in which the output shaft 11 is pivotally supported to be freely rotatable.
- the motor case 10 accommodates the electric motor 12 including a rotor and a stator in a watertight manner.
- the electric motor 12 is connected to the power source located outside the underwater motor pump 100. Further, the electric motor 12 is connected to the inverter device 31.
- the stator supplies a rotational force to the rotor through an electromagnetic action.
- the rotor is mechanically coupled to the output shaft 11 on which the first impeller 21 is provided, and the rotational force of the rotor is transmitted to the output shaft 11.
- the motor case 10 and the pump case 20 are sealed in a state in which the output shaft 11 is pivotally supported to be freely rotatable.
- the pump case 20 is placed on the bottom surface G of the water tank such that the underwater motor pump 100 can function by acting on the water stored in the water tank, even when the water level L of the water stored in the water tank decreases.
- the pump case 20 includes the discharge pipe 24 and a suction port 22.
- An internal space of the pump case 20 accommodates the first impeller 21 provided on the output shaft 11.
- the pump case 20 is submerged in water stored in the water tank and is supported via leg portions 23 that are in contact with the bottom surface G of the water tank.
- the pump case 20 suctions water into the internal space of the pump case 20 through the suction port 22 using the energy supplied by the first impeller 21 and discharges the suctioned water in the internal space to the discharge pipe 24.
- the discharge pipe 24 is a pipe for discharging water in the internal space of the pump case 20.
- One end of the discharge pipe 24 is open to the pump case 20, and the other end is connected to a main pipe (not shown) through which the suctioned water passes.
- the suction port 22 is an opening for suctioning water stored in the water tank.
- the suction port 22 is directed downward.
- the inverter case 30 accommodates the inverter device 31 inside.
- the inverter device 31 includes, for example, a substrate, an inverter circuit mounted on the substrate, a power supply circuit mounted on the substrate, a capacitor or the like mounted on the substrate.
- the inverter case 30 is disposed 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 disposed above the pump case 20, and the motor case 10 is disposed above the inverter case 30.
- heat exchange with a partition wall of the upper part of the pump case 20 can be performed using the flow of water inside the pump case 20 generated by the first impeller 21, so that the inverter case 30 disposed above the pump case 20 can be cooled. Therefore, the built-in inverter device 31 in the underwater motor pump 100 can be effectively cooled. Further, 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 underwater motor pump 100 can be made compact.
- the underwater motor pump 100 may include a mechanical seal case 40 that accommodates a mechanical sealing portion 41 that rotatably seals the output shaft 11 and a lubricating liquid 42 that lubricates the mechanical sealing portion 41.
- the mechanical sealing portion 41 may be a sliding bearing.
- the mechanical sealing portion 41 may be, for example, a bushing made of a synthetic resin.
- the lubricating liquid 42 lubricates a gap between the mechanical sealing portion 41 and the output shaft 11. As a result, wear and overheating of the mechanical sealing portion 41 can be suppressed while maintaining the sealing between the motor case 10 and the pump case 20. It is preferable that the inside of the mechanical seal case 40 is filled with the lubricating liquid 42.
- the lubricating liquid 42 may be, for example, turbine oil or may be a liquid resin having insulating properties.
- the inverter case 30 may be disposed between the mechanical seal case 40 and the motor case 10. As a result, it is possible to seal a space between the electric motor 12 and the pump case 20 in a state in which the output shaft 11 is pivotally supported to be freely rotatable, and it is possible to perform heat exchange between the water flowing inside the pump case 20 and the inverter device 31 accommodated in the inverter case 30 via the lubricating liquid 42 accommodated in the inverter case 30. Therefore, the inverter device 31 can be effectively cooled.
- the output shaft 11 may include a second impeller 43 that is disposed inside the mechanical seal case 40 and cause the lubricating liquid 42 to flow toward the inverter case 30.
- the lubricating liquid 42 that has flowed toward the inverter device 31 by the second impeller 43 undergoes heat exchange with a lower partition wall 30D of the inverter case 30. Therefore, the rotation of the output shaft 11 can be used to effectively cool the inverter device 31 accommodated in the inverter case 30.
- FIG. 2 is a side view of the underwater motor pump 200 according to the second embodiment. Description of matters common to the underwater motor pump 100 according to the first embodiment may not be repeated.
- the underwater motor pump 200 according to the second embodiment may include the mechanical seal case 40 that accommodates the mechanical sealing portion 41 which rotatably seals the output shaft 11 and the lubricating liquid 42 which lubricates the mechanical sealing portion 41, as in the underwater motor pump 100 according to the first embodiment.
- the inverter case 30 may be disposed between the mechanical seal case 40 and the pump case 20.
- the inverter case 30 can be cooled from both upper and lower sides by the lubricating liquid 42 and the water flowing inside the pump case 20. Therefore, the inverter device 31 can be effectively cooled.
- FIG. 3 is a side view of the underwater motor pump 300 according to the third embodiment. Description of matters common to the underwater motor pump 100 according to the first embodiment or the underwater motor pump 200 according to the second embodiment may not be repeated.
- the underwater motor pump 300 according to the third embodiment includes the inverter case 30 that also functions as the mechanical seal case 40.
- the inverter case 30 of the underwater motor pump 300 accommodates the mechanical sealing portion 41 that rotatably seals the output shaft 11 and the lubricating liquid 42 that lubricates the mechanical sealing portion 41.
- the inverter device 31 is disposed inside the inverter case 30. As a result, the inverter device 31 can undergo heat exchange by coming into direct contact with the lubricating liquid 42, so that the inverter device 31 can be effectively cooled.
- the inverter device 31 may be disposed in contact with the lower partition wall 30D of the inverter case 30. This can facilitate 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 the underwater motor pump 400 according to the fourth embodiment. Description of matters common to the underwater motor pump 100 according to the first embodiment to the underwater motor pump 300 according to the third embodiment may not be repeated.
- the underwater motor pump 400 according to the fourth embodiment includes the inverter case 30 that also functions as the mechanical seal case 40, as in the underwater motor pump 300 according to the third embodiment.
- the inverter device 31 may be disposed apart from an upper partition wall 30U and the lower partition wall 30D of the inverter case 30.
- the lubricating liquid 42 can circulate above and below the inverter device 31, which can facilitate heat exchange between the inverter device 31 and the lubricating liquid 42. Therefore, the inverter device 31 can be effectively cooled.
- the lubricating liquid 42 can be stirred to promote heat dissipation of the inverter device 31, which can contribute to the cooling of the inverter device 31.
- the underwater motor pump 400 according to each embodiment may not include the second impeller 43.
- the dimension in the vertical direction (height) can be reduced by the absence of the partition wall partitioning the inverter case 30 and the mechanical seal case 40, as compared with the underwater motor pump 100 according to the first embodiment shown in FIG. 1 or the underwater motor pump 200 according to the second embodiment shown in FIG. 2 in which the inverter case 30 and the mechanical seal case 40 are separately provided. Therefore, the structures of the underwater motor pumps 300 and 400 can be made compact.
- the underwater motor pump 100 includes the motor case 10 that accommodates the electric motor 12 which supplies a rotational force to the output shaft 11, the pump case 20 that includes the discharge pipe 24 and that accommodates the first impeller 21 provided on the output shaft 11, and the inverter case 30 that accommodates the inverter device 31 which controls the electric motor 12.
- the inverter case 30 is disposed between the pump case 20 and the motor case 10.
Landscapes
- 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 includes a motor case that accommodates an electric motor which supplies a rotational force to an output shaft, a pump case that has a discharge pipe and that accommodates a first impeller provided on the output shaft, and an inverter case that accommodates an inverter device which controls the electric motor. The inverter case is disposed between the pump case and the motor case.
Description
- The present invention relates to an underwater motor pump.
- Priority is claimed on
Japanese Patent Application No. 2021-094395, filed Jun 4, 2021 - Conventionally, there has been an underwater motor pump that is installed in a water tank and used in a submerged state in water in order to discharge water such as wastewater, drainage, or river water stored in the water tank (Patent Document 1).
- [Patent Document 1]
Japanese Unexamined Patent Application, First Publication No. 2019-15204 - However, there is room for improvement in cooling of a control unit in the conventional underwater motor pumps.
- The present invention provides an underwater motor pump capable of effectively cooling a built-in inverter device.
- The present invention has the following aspects.
- (1) According to an aspect of the present invention, there is provided an underwater motor pump is provided including: a motor case configured to accommodate an electric motor that applies a rotational force to an output shaft; a pump case including a discharge pipe and configured to accommodate a first impeller provided on the output shaft; and an inverter case configured to accommodate an inverter device that controls the electric motor, in which the inverter case is disposed between the pump case and the motor case.
- (2) In the aspect (1), the inverter device may be disposed in contact with a lower partition wall of the inverter case.
- (3) In the aspect (1), the inverter device may be disposed apart from an upper partition wall and a lower partition wall of the inverter case.
- (4) In any one of the aspects (1) to (3), a mechanical seal case configured to accommodate a mechanical sealing portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical sealing portion may be further provided, and the inverter case may be disposed between the mechanical seal case and the motor case.
- (5) In any one of the aspects (1) to (3), a mechanical seal case configured to accommodate a mechanical sealing portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical sealing portion may be further provided, and the inverter case may be disposed between the mechanical seal case and the pump case.
- (6) In the aspect (4) or (5), the output shaft may include a second impeller that is disposed inside the mechanical seal case and that causes the lubricating liquid to flow toward the inverter case.
- (7) In any one of the aspects (1) to (3), the inverter case may accommodate a mechanical sealing portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical sealing portion, and the inverter device may be disposed inside the inverter case.
- (8) In the aspect (7), the output shaft may include a second impeller that is disposed inside the inverter case and that causes the lubricating liquid to flow toward the inverter case.
- According to the present invention, it is possible to provide an underwater motor pump capable of effectively cooling a built-in inverter device.
-
-
FIG. 1 is a side view of an underwater motor pump according to a first embodiment. -
FIG. 2 is a side view of an underwater motor pump according to a second embodiment. -
FIG. 3 is a side view of an underwater motor pump according to a third embodiment. -
FIG. 4 is a side view of an underwater motor pump according to a fourth embodiment. - Hereinafter, an
underwater motor pump 100 according to a first embodiment will be described.FIG. 1 is a side view of theunderwater motor pump 100 according to the first embodiment. InFIGS. 1 to 4 , a vertical direction is indicated by an arrow Z, and a horizontal direction is indicated by an arrow X and an arrow Y. - As shown in
FIG. 1 , theunderwater motor pump 100 according to the first embodiment can be applied to, for example, a pump that pumps up water such as wastewater, drainage, or river water. Theunderwater motor pump 100 is typically placed on a bottom surface G of a water tank in which water is stored up to a water level L, and is used in a submerged state in the water. - The
underwater motor pump 100 includes amotor case 10 that accommodates anelectric motor 12 which supplies a rotational force to anoutput shaft 11, apump case 20 that includes adischarge pipe 24 and that accommodates afirst impeller 21 provided on theoutput shaft 11, and aninverter case 30 that accommodates aninverter device 31 which controls theelectric motor 12. Theelectric motor 12 and theinverter device 31 of theunderwater motor pump 100 are appropriately connected to a power source (not shown) via a power cable C that penetrates theinverter case 30 while maintaining water tightness. - The
motor case 10 is provided above thepump case 20. As a result, even in a case where the water level L decreases and themotor case 10 is exposed above the water surface of the water stored in the water tank, the operation of theunderwater motor pump 100 can continue. In addition, the planar dimension of theunderwater motor pump 100 can be made compact. - The
motor case 10 and thepump case 20 are sealed in a state in which theoutput shaft 11 is pivotally supported to be freely rotatable. - The
motor case 10 accommodates theelectric motor 12 including a rotor and a stator in a watertight manner. Theelectric motor 12 is connected to the power source located outside theunderwater motor pump 100. Further, theelectric motor 12 is connected to theinverter device 31. The stator supplies a rotational force to the rotor through an electromagnetic action. The rotor is mechanically coupled to theoutput shaft 11 on which thefirst impeller 21 is provided, and the rotational force of the rotor is transmitted to theoutput shaft 11. - The
motor case 10 and thepump case 20 are sealed in a state in which theoutput shaft 11 is pivotally supported to be freely rotatable. - The
pump case 20 is placed on the bottom surface G of the water tank such that theunderwater motor pump 100 can function by acting on the water stored in the water tank, even when the water level L of the water stored in the water tank decreases. - The
pump case 20 includes thedischarge pipe 24 and asuction port 22. An internal space of thepump case 20 accommodates thefirst impeller 21 provided on theoutput shaft 11. Thepump case 20 is submerged in water stored in the water tank and is supported vialeg portions 23 that are in contact with the bottom surface G of the water tank. Thepump case 20 suctions water into the internal space of thepump case 20 through thesuction port 22 using the energy supplied by thefirst impeller 21 and discharges the suctioned water in the internal space to thedischarge pipe 24. - The
discharge pipe 24 is a pipe for discharging water in the internal space of thepump case 20. One end of thedischarge pipe 24 is open to thepump case 20, and the other end is connected to a main pipe (not shown) through which the suctioned water passes. - The
suction port 22 is an opening for suctioning water stored in the water tank. Thesuction port 22 is directed downward. - The
inverter case 30 accommodates theinverter device 31 inside. - The
inverter device 31 includes, for example, a substrate, an inverter circuit mounted on the substrate, a power supply circuit mounted on the substrate, a capacitor or the like mounted on the substrate. - Here, the
inverter case 30 is disposed between thepump case 20 and themotor case 10. That is, thepump case 20 is placed on the bottom surface G of the water tank, theinverter case 30 is disposed above thepump case 20, and themotor case 10 is disposed above theinverter case 30. As a result, heat exchange with a partition wall of the upper part of thepump case 20 can be performed using the flow of water inside thepump case 20 generated by thefirst impeller 21, so that theinverter case 30 disposed above thepump case 20 can be cooled. Therefore, the built-ininverter device 31 in theunderwater motor pump 100 can be effectively cooled. Further, since the distance between theinverter device 31 and theelectric motor 12 can be shortened, the electrical wiring between the two can be shortened. Therefore, the structure of theunderwater motor pump 100 can be made compact. - Further, the
underwater motor pump 100 may include amechanical seal case 40 that accommodates amechanical sealing portion 41 that rotatably seals theoutput shaft 11 and a lubricatingliquid 42 that lubricates themechanical sealing portion 41. Themechanical sealing portion 41 may be a sliding bearing. Themechanical sealing portion 41 may be, for example, a bushing made of a synthetic resin. The lubricatingliquid 42 lubricates a gap between themechanical sealing portion 41 and theoutput shaft 11. As a result, wear and overheating of themechanical sealing portion 41 can be suppressed while maintaining the sealing between themotor case 10 and thepump case 20. It is preferable that the inside of themechanical seal case 40 is filled with the lubricatingliquid 42. The lubricatingliquid 42 may be, for example, turbine oil or may be a liquid resin having insulating properties. - The
inverter case 30 may be disposed between themechanical seal case 40 and themotor case 10. As a result, it is possible to seal a space between theelectric motor 12 and thepump case 20 in a state in which theoutput shaft 11 is pivotally supported to be freely rotatable, and it is possible to perform heat exchange between the water flowing inside thepump case 20 and theinverter device 31 accommodated in theinverter case 30 via the lubricatingliquid 42 accommodated in theinverter case 30. Therefore, theinverter device 31 can be effectively cooled. - In addition, the
output shaft 11 may include asecond impeller 43 that is disposed inside themechanical seal case 40 and cause the lubricatingliquid 42 to flow toward theinverter case 30. As a result, the lubricatingliquid 42 that has flowed toward theinverter device 31 by thesecond impeller 43 undergoes heat exchange with alower partition wall 30D of theinverter case 30. Therefore, the rotation of theoutput shaft 11 can be used to effectively cool theinverter device 31 accommodated in theinverter case 30. - Next, an
underwater motor pump 200 according to a second embodiment will be described.FIG. 2 is a side view of theunderwater motor pump 200 according to the second embodiment. Description of matters common to theunderwater motor pump 100 according to the first embodiment may not be repeated. - The
underwater motor pump 200 according to the second embodiment may include themechanical seal case 40 that accommodates themechanical sealing portion 41 which rotatably seals theoutput shaft 11 and the lubricatingliquid 42 which lubricates themechanical sealing portion 41, as in theunderwater motor pump 100 according to the first embodiment. - Here, the
inverter case 30 may be disposed between themechanical seal case 40 and thepump case 20. As a result, it is possible to seal the space between theelectric motor 12 and thepump case 20 in a state in which theoutput shaft 11 is pivotally supported to be freely rotatable, and it is possible to perform heat exchange between the water flowing inside thepump case 20 and theinverter device 31 accommodated in theinverter case 30 via thelower partition wall 30D of theinverter case 30 and to perform heat exchange between the lubricatingliquid 42 accommodated in themechanical seal case 40 and theinverter device 31 accommodated in theinverter case 30 via a partition wall of the upper part of theinverter case 30. In other words, theinverter case 30 can be cooled from both upper and lower sides by the lubricatingliquid 42 and the water flowing inside thepump case 20. Therefore, theinverter device 31 can be effectively cooled. - Next, an
underwater motor pump 300 according to a third embodiment will be described.FIG. 3 is a side view of theunderwater motor pump 300 according to the third embodiment. Description of matters common to theunderwater motor pump 100 according to the first embodiment or theunderwater motor pump 200 according to the second embodiment may not be repeated. - Unlike the
underwater motor pump 100 according to the first embodiment or theunderwater motor pump 200 according to the second embodiment, theunderwater motor pump 300 according to the third embodiment includes theinverter case 30 that also functions as themechanical seal case 40. - That is, the
inverter case 30 of theunderwater motor pump 300 according to the third embodiment accommodates themechanical sealing portion 41 that rotatably seals theoutput shaft 11 and the lubricatingliquid 42 that lubricates themechanical sealing portion 41. Theinverter device 31 is disposed inside theinverter case 30. As a result, theinverter device 31 can undergo heat exchange by coming into direct contact with the lubricatingliquid 42, so that theinverter device 31 can be effectively cooled. - Here, the
inverter device 31 may be disposed in contact with thelower partition wall 30D of theinverter case 30. This can facilitate heat exchange between theinverter device 31 and the water inside thepump case 20. Theinverter device 31 can be effectively cooled. - Next, an
underwater motor pump 400 according to a fourth embodiment will be described.FIG. 4 is a side view of theunderwater motor pump 400 according to the fourth embodiment. Description of matters common to theunderwater motor pump 100 according to the first embodiment to theunderwater motor pump 300 according to the third embodiment may not be repeated. - The
underwater motor pump 400 according to the fourth embodiment includes theinverter case 30 that also functions as themechanical seal case 40, as in theunderwater motor pump 300 according to the third embodiment. - Here, the
inverter device 31 may be disposed apart from anupper partition wall 30U and thelower partition wall 30D of theinverter case 30. As a result, the lubricatingliquid 42 can circulate above and below theinverter device 31, which can facilitate heat exchange between theinverter device 31 and the lubricatingliquid 42. Therefore, theinverter device 31 can be effectively cooled. - Further, by rotating and driving the
output shaft 11 and a stirring blade (second impeller 43) in synchronization with each other, the lubricatingliquid 42 can be stirred to promote heat dissipation of theinverter device 31, which can contribute to the cooling of theinverter device 31. - The
underwater motor pump 400 according to each embodiment may not include thesecond impeller 43. - Further, with the
underwater motor pump 300 according to the third embodiment shown inFIG. 3 or theunderwater motor pump 400 according to the fourth embodiment shown inFIG. 4 in which the functions of theinverter case 30 and of themechanical seal case 40 are combined into theinverter case 30 having a single chamber, the dimension in the vertical direction (height) can be reduced by the absence of the partition wall partitioning theinverter case 30 and themechanical seal case 40, as compared with theunderwater motor pump 100 according to the first embodiment shown inFIG. 1 or theunderwater motor pump 200 according to the second embodiment shown inFIG. 2 in which theinverter case 30 and themechanical seal case 40 are separately provided. Therefore, the structures of the underwater motor pumps 300 and 400 can be made compact. - Although the embodiments have been described above with reference to the drawings, the present invention is not limited to the above description. A plurality of features described as the embodiments may be freely combined.
- The
underwater motor pump 100 according to the present embodiment includes themotor case 10 that accommodates theelectric motor 12 which supplies a rotational force to theoutput shaft 11, thepump case 20 that includes thedischarge pipe 24 and that accommodates thefirst impeller 21 provided on theoutput shaft 11, and theinverter case 30 that accommodates theinverter device 31 which controls theelectric motor 12. Theinverter case 30 is disposed between thepump case 20 and themotor case 10. As a result, heat exchange with the partition wall of the upper part of thepump case 20 can be performed using the flow of water inside thepump case 20 generated by thefirst impeller 21, so that theinverter case 30 disposed above thepump case 20 can be cooled. Therefore, the built-ininverter device 31 in theunderwater motor pump 100 can be effectively cooled. Further, since the distance between theinverter device 31 and theelectric motor 12 can be shortened, the electrical wiring between the two can be shortened. Therefore, the structure of theunderwater motor pump 100 can be made compact. -
- 10: Motor case
- 11: Output shaft
- 12: Electric motor
- 20: Pump case
- 21: First impeller
- 22: Suction port
- 23: Leg portion
- 24: Discharge pipe
- 30: Inverter case
- 30D: Lower partition wall
- 30U: Upper partition wall
- 31: Inverter device
- 40: Mechanical seal case
- 41: Mechanical sealing portion
- 42: Lubricating liquid
- 43: Second impeller
- 100, 200, 300, 400: Underwater motor pump
- C: Power cable
- G: Bottom surface
- L: Water level
Claims (8)
- An underwater motor pump comprising:a motor case configured to accommodate an electric motor that supplies a rotational force to an output shaft;a pump case including a discharge pipe and configured to accommodate a first impeller provided on the output shaft; andan inverter case configured to accommodate an inverter device that controls the electric motor,wherein the inverter case is disposed between the pump case and the motor case.
- The underwater motor pump according to Claim 1,
wherein the inverter device is disposed in contact with a lower partition wall of the inverter case. - The underwater motor pump according to Claim 1,
wherein the inverter device is disposed apart from an upper partition wall and a lower partition wall of the inverter case. - The underwater motor pump according to any one of Claims 1 to 3, further comprising:a mechanical seal case configured to accommodate a mechanical sealing portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical sealing portion,wherein the inverter case is disposed between the mechanical seal case and the motor case.
- The underwater motor pump according to any one of Claims 1 to 3, further comprising:a mechanical seal case configured to accommodate a mechanical sealing portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical sealing portion,wherein the inverter case is disposed between the mechanical seal case and the pump case.
- The underwater motor pump according to Claim 4 or 5,
wherein the output shaft includes a second impeller that is disposed inside the mechanical seal case and that causes the lubricating liquid to flow toward the inverter case. - The underwater motor pump according to any one of Claims 1 to 3,wherein the inverter case accommodates a mechanical sealing portion that rotatably seals the output shaft and a lubricating liquid that lubricates the mechanical sealing portion, andthe inverter device is disposed inside the inverter case.
- The underwater motor pump according to Claim 7,
wherein the output shaft includes a second impeller that is disposed inside the inverter case and that causes the lubricating liquid to flow toward the inverter case.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021094395A JP2022186259A (en) | 2021-06-04 | 2021-06-04 | submersible motor pump |
PCT/JP2022/003444 WO2022254781A1 (en) | 2021-06-04 | 2022-01-28 | Underwater motor pump |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4350147A1 true EP4350147A1 (en) | 2024-04-10 |
Family
ID=84324086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22815541.2A Pending EP4350147A1 (en) | 2021-06-04 | 2022-01-28 | Underwater motor pump |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4350147A1 (en) |
JP (1) | JP2022186259A (en) |
CN (1) | CN117203431A (en) |
WO (1) | WO2022254781A1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4120665A1 (en) * | 1991-06-22 | 1992-12-24 | Teves Gmbh Alfred | ELECTRICALLY DRIVEN HYDRAULIC PUMP |
JP4138111B2 (en) * | 1998-06-18 | 2008-08-20 | アスモ株式会社 | Fluid pump device |
JP4785996B1 (en) * | 2011-03-29 | 2011-10-05 | 株式会社寺田ポンプ製作所 | Oil lifter device for lubricating sliding surface in oil chamber shaft seal device of submersible 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 |
US20210178230A1 (en) | 2019-12-12 | 2021-06-17 | Volvik Inc. | Color golf ball with natural metallic gloss |
-
2021
- 2021-06-04 JP JP2021094395A patent/JP2022186259A/en active Pending
-
2022
- 2022-01-28 WO PCT/JP2022/003444 patent/WO2022254781A1/en active Application Filing
- 2022-01-28 CN CN202280030260.6A patent/CN117203431A/en active Pending
- 2022-01-28 EP EP22815541.2A patent/EP4350147A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2022186259A (en) | 2022-12-15 |
CN117203431A (en) | 2023-12-08 |
WO2022254781A1 (en) | 2022-12-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10151318B2 (en) | Omnirise hydromag “variable speed magnetic coupling system for subsea pumps” | |
RU2648802C2 (en) | Cooling arrangement of a pump intended for pumping a liquid | |
RU2457363C2 (en) | Pump system | |
US3653785A (en) | Pump unit | |
US8740586B2 (en) | Heat exchanger for ESP motor | |
US3513942A (en) | Device for lubricating a bearing for use in a canned motor pump and an agitator | |
KR101042028B1 (en) | Motor pump | |
RU2591755C2 (en) | Underwater compressor driven directly motor with permanent magnets, stator and rotor of which are immersed in liquid | |
BRPI0709151A2 (en) | compressor unit and mounting method | |
US20160312784A1 (en) | Submersible pump with cooling system for motor through surrounding water | |
US7936077B2 (en) | Internal fluid handling for hydro-generator submerged in water | |
CN111525736A (en) | Water-cooling frequency conversion all-in-one machine for driving slurry pump and slurry circulation system | |
EP4350147A1 (en) | Underwater motor pump | |
US20240229799A1 (en) | Underwater motor pump | |
US6079958A (en) | Dry-pit submersible pump having a fan and a torque-relieving mechanism | |
JP2009180151A (en) | High-speed rotating equipment | |
JP2015075051A (en) | Motor cooling device of vertical electric pump | |
JP2017101646A (en) | Motor pump | |
CN109088501A (en) | A kind of mining amphibious motor | |
JP2002138940A (en) | Inline type pump-reversing hydraulic turbine | |
KR102573673B1 (en) | Submerged motor pump with heat dissipation structure | |
CN217643022U (en) | Integrated vibration motor | |
JP2018204518A (en) | Pump and brine circulation device | |
KR102188203B1 (en) | Pump | |
KR102188200B1 (en) | Pump |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20231128 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |