CN108448790B - Permanent magnet motor and submersible pump - Google Patents
Permanent magnet motor and submersible pump Download PDFInfo
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- CN108448790B CN108448790B CN201810618010.XA CN201810618010A CN108448790B CN 108448790 B CN108448790 B CN 108448790B CN 201810618010 A CN201810618010 A CN 201810618010A CN 108448790 B CN108448790 B CN 108448790B
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- rotor shaft
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- 239000007788 liquid Substances 0.000 claims abstract description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000009434 installation Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000010865 sewage Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/132—Submersible electric motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application relates to the technical field of submersible pumps, in particular to a permanent magnet motor and a submersible pump. The permanent magnet motor comprises a shell; the shell is of a vertical structure and comprises a first end and a second end; the first end of the shell is connected with a first bearing seat; a rotor is arranged in the shell, and a rotor shaft is connected with a first bearing seat through a first bearing; a first cavity is formed between the first bearing seat and the rotor shaft; the first cavity is internally provided with air; when one side of the first cavity close to the second end is immersed in the liquid, the liquid level rises, and air is compressed in the direction close to the first end until the pressure of the air is the same as that of the liquid, and at the moment, the liquid level of the liquid is below the first bearing. The submersible pump comprises the permanent magnet motor. The application provides a permanent magnet motor and a submersible pump, which are used for solving the technical problems of more parts, complex structure, high manufacturing difficulty and high installation difficulty of the submersible pump in the prior art.
Description
Technical Field
The application relates to the technical field of submersible pumps, in particular to a permanent magnet motor and a submersible pump.
Background
The submersible pump is also called a submerged pump, and is a pump which works in potential water (under the liquid). The submerged pump is an important device for urban sewage discharge, sewage treatment, road and bridge engineering drainage, irrigation and drainage in hydraulic engineering, etc. With the perfection of national environmental regulations and the enhancement of environmental awareness of people, submersible pumps for sewage treatment are increasingly demanded and applied. The submersible pump is immersed into sewage with various water qualities for a long time to run, and the working environment is bad. Because the submersible motor runs under the water, the working condition is complex, and therefore, the submersible motor is completely sealed in structural design.
Referring to fig. 1, fig. 1 is a schematic structural view of a submersible pump according to the prior art; the prior art submersible pump consists of an electric motor, which in addition to a stator 1' and a rotor 2', comprises a mechanical seal 3' and an oil seal 4' to ensure tightness, wherein the rotor shaft is supported on the frame by means of bearings 5 '. The bearing 5 'of the conventional product cannot be used in water for a long time, and if the liquid level in the pump exceeds the bearing 5' or not, the motor winding and the bearing fail due to the fact that the liquid level in the pump exceeds the bearing, and therefore an oil seal and a mechanical seal are required to be arranged. In the motor installation process, the motor stator is matched with the oil seal end face spigot, and the oil seal end face is matched with the pump cover spigot, so that the coaxiality precision of the oil seal and the shaft is required to be extremely high, otherwise, the shaft and the mechanical seal are difficult to assemble, so that the submersible pump in the prior art has the defects of more parts, complex structure, high manufacturing difficulty and high installation difficulty.
Accordingly, the present application addresses the above-described problems by providing a new permanent magnet motor and submersible pump.
Disclosure of Invention
The application aims to provide a permanent magnet motor to solve the technical problems of multiple parts, complex structure, high manufacturing difficulty and high installation difficulty of a submersible pump in the prior art.
The application also aims to provide the submersible pump so as to further solve the technical problems of more parts, complex structure, high manufacturing difficulty and high installation difficulty of the submersible pump in the prior art.
Based on the first object, the present application provides a permanent magnet motor, comprising a housing;
the shell is of a vertical structure, and comprises a first end and a second end which are corresponding to each other along the height direction of the shell, wherein the first end is positioned above the second end;
a first bearing seat is connected to one side of the shell, which is close to the first end;
a rotor is arranged in the shell, and one side, close to the first end, of a rotor shaft of the rotor is connected with the first bearing seat through a first bearing;
a first cavity is formed between the first bearing seat and the rotor shaft, and the first bearing is positioned in the first cavity;
the first cavity is internally provided with air;
when one side of the first cavity, which is close to the second end, is immersed in liquid, the liquid level of the liquid rises, and the air is compressed in the direction close to the first end until the pressure of the air is the same as that of the liquid, and at the moment, the liquid level of the liquid is below the first bearing.
In any one of the above technical solutions, further, in the present application, the first cavity is formed between the first bearing seat, a side of the rotor shaft near the first end, and a shoulder of the rotor shaft;
a first gap is formed between one side of the first bearing seat far away from the first end and the shaft shoulder of the rotor shaft;
the first gap enables the first cavity to be communicated with the outside of the first bearing seat.
In any one of the above technical solutions, further, a second bearing is connected to a side of the casing near the second end;
one side of a rotor shaft of the rotor, which is close to the second end, is connected with the second bearing seat through a second bearing;
wherein a second cavity is formed between the second bearing and the rotor shaft, and the second bearing is positioned in the second cavity;
the second cavity is internally provided with air;
when one side of the second cavity, which is close to the second end, is immersed in the liquid, the liquid level of the liquid rises, and the air is compressed in the direction close to the first end until the pressure of the air is the same as that of the liquid, and at this time, the liquid level of the liquid is below the second bearing.
In any of the above technical solutions, further, the permanent magnet motor of the present application further includes a first bearing bracket;
the first bearing is positioned with the shaft shoulder of the rotor shaft through the first bearing bracket;
the first cavity is formed between the first bearing seat, the first bearing bracket and the shaft shoulder of the rotor shaft.
In any of the above technical solutions, further, the permanent magnet motor of the present application further includes a second bearing bracket;
the second bearing is positioned with the rotor shaft by the second bearing bracket near the shaft shoulder of the second end;
the second cavity is formed among the second bearing bracket, the second bearing bracket and the shaft shoulder of the rotor shaft.
In any of the above technical solutions, further, the permanent magnet motor of the present application further includes a third bearing bracket;
one end of the second bearing along the axial direction is positioned with a shaft shoulder of the rotor shaft close to the second end, and the other end of the second bearing is positioned through the second bearing bracket;
one end of the second bearing support, which is far away from the second bearing, is connected with the second bearing seat through the third bearing support.
In any of the above technical solutions, further, the permanent magnet motor of the present application further includes a sheath;
the sheath is sleeved on the rotor shaft and is positioned at a shaft shoulder of the rotor shaft, which is close to the second end;
the second cavity is formed among the second bearing bracket, the sheath, the second bearing bracket and the third bearing bracket.
In any of the above technical solutions, further, in the present application, the first bearing is located at a side of the first cavity near the first end;
and/or the second bearing is positioned at one side of the second cavity close to the first end.
Based on the second object, the application provides a submersible pump comprising the permanent magnet motor.
In any of the above technical solutions, further, the submersible pump of the present application further comprises a water pump;
the water pump is arranged on one side, close to the second end, of the permanent magnet motor, and the water pump is connected with the rotor shaft.
By adopting the technical scheme, the application has the following beneficial effects:
there is the air in the first cavity, when setting up the immersible pump in the liquid, in the liquid gets into the immersible pump, simultaneously, be close to through first cavity one side entering first cavity of second end, along with the immersible pump deepens in the degree of depth of immersing in the liquid, the liquid level of liquid in the first cavity continues to rise, the liquid is towards being close to the direction compression of first end the air, along with the air volume is compressed, the pressure increase of air to the liquid, until the pressure of air is the same with the pressure of liquid, at this moment, the liquid level of liquid no longer rises, at this moment, the liquid level of liquid is located under the first bearing to guarantee that the first bearing can not contact with liquid, realize the immersible pump and reliably work under the liquid. In summary, by utilizing the pressure balance principle, the first bearing is protected in the air, so that the first bearing can not be contacted with the liquid, an oil seal and a mechanical seal are canceled, the structure of the submersible pump is simplified, the reliability is improved, and the installation is convenient.
The submersible pump provided by the application comprises the permanent magnet motor, and further solves the technical problems of multiple parts, complex structure, high manufacturing difficulty and high installation difficulty of the submersible pump in the prior art.
Additional aspects and advantages of the application will be set forth in part in the description which follows, or may be learned by practice of the application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a submersible pump in the prior art;
FIG. 2 is a schematic diagram of a submersible pump according to an embodiment of the present application;
fig. 3 is a schematic view of the submersible pump shown in fig. 2 during application.
Icon: 1' -stator; a 2' -rotor; 3' -mechanical sealing; 4' -oil seal; a 5' -bearing; 6' -float switch;
1-a shell; 2-rotor shaft; 31-a first bearing seat; 32-a second bearing block; 41-a first bearing; 42-a second bearing; 51-a first bearing support; 52-a second bearing support; 53-a third bearing support; 61-a first cavity; 62-a second cavity; 7-a sheath; 8-a water pump.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 2 to 3, the present embodiment provides a permanent magnet motor including a casing 1;
the shell 1 is of a vertical structure, and comprises a first end and a second end which are corresponding to each other along the height direction of the shell 1, wherein the first end is positioned above the second end;
a first bearing seat 31 is connected to one side of the casing 1 close to the first end;
a rotor is arranged in the casing, and one side of a rotor shaft 2 of the rotor, which is close to the first end, is connected with the first bearing seat 31 through a first bearing 41;
wherein a first cavity 61 is formed between the first bearing seat 31 and the rotor shaft 2, and the first bearing 41 is located in the first cavity 61;
air is arranged in the first cavity 61;
referring to fig. 3, when the side of the first cavity near the second end is immersed in the liquid, the liquid level of the liquid rises and compresses the air in a direction near the first end until the pressure of the air is the same as the pressure of the liquid, and at this time, the liquid level of the liquid is below the first bearing.
Preferably, the housing comprises a sidewall circumscribing, optionally, the sidewall making the housing cylindrical.
The housing is a vertical housing, i.e. the axial direction of the housing is vertical.
There is the air in the first cavity, when setting up the immersible pump in the liquid, in the liquid gets into the immersible pump, simultaneously, be close to through first cavity one side entering first cavity of second end, along with the immersible pump deepens in the degree of depth of immersing in the liquid, the liquid level of liquid in the first cavity continues to rise, the liquid is towards being close to the direction compression of first end the air, along with the air volume is compressed, the pressure increase of air to the liquid, until the pressure of air is the same with the pressure of liquid, at this moment, the liquid level of liquid no longer rises, at this moment, the liquid level of liquid is located under the first bearing to guarantee that the first bearing can not contact with liquid, realize the immersible pump and reliably work under the liquid.
In summary, by utilizing the pressure balance principle, the first bearing is protected in the air, so that the first bearing can not be contacted with the liquid, an oil seal and a mechanical seal are canceled, the structure of the submersible pump is simplified, the reliability is improved, and the installation is convenient.
Optionally, the first cavity is formed among the first bearing seat, one side of the rotor shaft close to the first end and a shaft shoulder of the rotor shaft;
a first gap is formed between one side of the first bearing seat far away from the first end and the shaft shoulder of the rotor shaft;
the first gap enables the first cavity to be communicated with the outside of the first bearing seat.
Thereby immersing a side of the first cavity near the second end into the liquid and compressing air in the first cavity in a direction near the first end.
Preferably, referring to fig. 2, the permanent magnet motor according to the present embodiment further includes a first bearing bracket 51;
the first bearing 41 is positioned with the shoulder of the rotor shaft 2 by the first bearing bracket 51;
the first cavity is formed between the first bearing seat, the first bearing bracket and the shaft shoulder of the rotor shaft.
Preferably, a second bearing seat 32 is connected to one side of the casing near the second end;
one side of the rotor shaft 2 of the rotor, which is close to the second end, is connected with the second bearing seat 32 through a second bearing 42;
wherein a second cavity 62 is formed between the second bearing 32 and the rotor shaft 2, and the second bearing 42 is located in the second cavity 62;
the second cavity is internally provided with air;
when one side of the second cavity, which is close to the second end, is immersed in the liquid, the liquid level of the liquid rises, and the air is compressed in the direction close to the first end until the pressure of the air is the same as that of the liquid, and at this time, the liquid level of the liquid is below the second bearing.
The second cavity is internally provided with air, when the submersible pump is arranged in the liquid, the liquid enters the submersible pump, meanwhile, one side, close to the second end, of the second cavity enters the second cavity, the liquid level of the liquid in the second cavity continuously rises along with deepening of the immersed depth of the submersible pump, the air is compressed in the direction, close to the first end, of the liquid, the pressure of the air on the liquid increases along with the compressed air volume until the pressure of the air is the same as the pressure of the liquid, at the moment, the liquid level of the liquid does not rise any more, and at the moment, the liquid level of the liquid is located below the second bearing so as to ensure that the second bearing can not be contacted with the liquid, and the submersible pump can reliably work under the liquid.
In summary, the second bearing is protected in the air by using the pressure balance principle, so that the second bearing can not be contacted with the liquid, an oil seal and a mechanical seal are canceled, the structure of the submersible pump is further simplified, the reliability is improved, and the installation is convenient.
Preferably, referring to fig. 2, the permanent magnet motor according to the present embodiment further includes a second bearing bracket 52;
the second bearing 42 is positioned with the shoulder of the rotor shaft 2 near the second end by the second bearing bracket 52;
the second cavity is formed among the second bearing bracket, the second bearing bracket and the shaft shoulder of the rotor shaft.
Preferably, the permanent magnet motor according to the present embodiment further includes a third bearing bracket 53;
one end of the second bearing 42 in the axial direction is positioned with a shoulder of the rotor shaft 2 near the second end, and the other end is positioned through the second bearing bracket 52;
the end of the second bearing bracket 52 remote from the second bearing 42 is connected to the second bearing housing 32 via the third bearing bracket 53.
Thereby the positioning of the second bearing is accurate and reliable.
Preferably, the permanent magnet motor according to the present embodiment further comprises a sheath 7;
the sheath 7 is sleeved on the rotor shaft 2 and is positioned at a shaft shoulder of the rotor shaft 2 close to the second end;
the second cavity is formed among the second bearing bracket, the sheath, the second bearing bracket and the third bearing bracket.
Preferably, the first bearing is located at a side of the first cavity near the first end;
and/or the second bearing is positioned at one side of the second cavity close to the first end.
Specifically, the first bearing is located at one side of the first cavity near the first end;
alternatively, the second bearing is located on a side of the second cavity proximate the first end.
Or the first bearing is positioned on one side of the first cavity close to the first end; and the second bearing is positioned at one side of the second cavity close to the first end.
Preferably, the first bearing is located at a side of the first cavity near the first end; and the second bearing is positioned at one side of the second cavity close to the first end.
Thereby making the protection of the first bearing and the second bearing more reliable.
Example two
A second embodiment provides a submersible pump, where the submersible pump includes the permanent magnet motor described in the first embodiment, and technical features of the permanent magnet motor disclosed in the first embodiment are also applicable to the first embodiment, and technical features of the permanent magnet motor disclosed in the first embodiment are not repeated. Embodiments of the submersible pump are described in further detail below with reference to the accompanying drawings.
For economy of description, the improved features of this embodiment are also embodied in fig. 2-3, and therefore, the solution of this embodiment will be described with reference to fig. 2-3.
Referring to fig. 2-3, the submersible pump provided by the embodiment comprises the permanent magnet motor, and further solves the technical problems of more parts, complex structure, high manufacturing difficulty and high installation difficulty of the submersible pump in the prior art.
Preferably, the submersible pump of the embodiment further comprises a water pump 8;
the water pump 8 is arranged on one side of the permanent magnet motor, which is close to the second end, and the water pump 8 is connected with the rotor shaft 2.
The submersible pump according to this embodiment has the advantages of the permanent magnet motor according to embodiment one, which have been described in detail in embodiment one and are not repeated here.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (10)
1. A permanent magnet motor, comprising a housing;
the shell is of a vertical structure, and comprises a first end and a second end which are corresponding to each other along the height direction of the shell, wherein the first end is positioned above the second end;
a first bearing seat is connected to one side of the shell, which is close to the first end;
a rotor is arranged in the shell, and one side, close to the first end, of a rotor shaft of the rotor is connected with the first bearing seat through a first bearing;
a first cavity is formed between the first bearing seat and the rotor shaft, and the first bearing is positioned in the first cavity;
the first cavity is internally provided with air;
when one side of the first cavity, which is close to the second end, is immersed in liquid, the liquid level of the liquid rises, and the air is compressed in the direction close to the first end until the pressure of the air is the same as that of the liquid, and at the moment, the liquid level of the liquid is below the first bearing.
2. The permanent magnet motor of claim 1 wherein the first housing, a side of the rotor shaft proximate the first end, and a shoulder of the rotor shaft form the first cavity therebetween;
a first gap is formed between one side of the first bearing seat far away from the first end and the shaft shoulder of the rotor shaft;
the first gap enables the first cavity to be communicated with the outside of the first bearing seat.
3. The permanent magnet motor of claim 1 wherein a second bearing mount is connected to a side of the housing proximate the second end;
one side of a rotor shaft of the rotor, which is close to the second end, is connected with the second bearing seat through a second bearing;
wherein a second cavity is formed between the second bearing and the rotor shaft, and the second bearing is positioned in the second cavity;
the second cavity is internally provided with air;
when one side of the second cavity, which is close to the second end, is immersed in the liquid, the liquid level of the liquid rises, and the air is compressed in the direction close to the first end until the pressure of the air is the same as that of the liquid, and at this time, the liquid level of the liquid is below the second bearing.
4. The permanent magnet motor of claim 2 further comprising a first bearing support;
the first bearing is positioned with the shaft shoulder of the rotor shaft through the first bearing bracket;
the first cavity is formed between the first bearing seat, the first bearing bracket and the shaft shoulder of the rotor shaft.
5. A permanent magnet motor according to claim 3 further comprising a second bearing bracket;
the second bearing is positioned with the rotor shaft by the second bearing bracket near the shaft shoulder of the second end;
the second cavity is formed among the second bearing bracket, the second bearing bracket and the shaft shoulder of the rotor shaft.
6. The permanent magnet motor of claim 5 further comprising a third bearing support;
one end of the second bearing along the axial direction is positioned with a shaft shoulder of the rotor shaft close to the second end, and the other end of the second bearing is positioned through the second bearing bracket;
one end of the second bearing support, which is far away from the second bearing, is connected with the second bearing seat through the third bearing support.
7. The permanent magnet motor of claim 6 further comprising a sheath;
the sheath is sleeved on the rotor shaft and is positioned at a shaft shoulder of the rotor shaft, which is close to the second end;
the second cavity is formed among the second bearing bracket, the sheath, the second bearing bracket and the third bearing bracket.
8. A permanent magnet motor according to claim 3 wherein the first bearing is located on a side of the first cavity adjacent the first end;
and/or the second bearing is positioned at one side of the second cavity close to the first end.
9. A submersible pump comprising a permanent magnet motor according to any one of claims 1-8.
10. The submersible pump of claim 9, further comprising a water pump;
the water pump is arranged on one side, close to the second end, of the permanent magnet motor, and the water pump is connected with the rotor shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810618010.XA CN108448790B (en) | 2018-06-15 | 2018-06-15 | Permanent magnet motor and submersible pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810618010.XA CN108448790B (en) | 2018-06-15 | 2018-06-15 | Permanent magnet motor and submersible pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108448790A CN108448790A (en) | 2018-08-24 |
| CN108448790B true CN108448790B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810618010.XA Active CN108448790B (en) | 2018-06-15 | 2018-06-15 | Permanent magnet motor and submersible pump |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112165203B (en) * | 2020-09-25 | 2021-08-31 | 宁波精成电机有限公司 | Motor structure |
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| US7091638B2 (en) * | 2004-10-14 | 2006-08-15 | Pentair Pump Group, Inc. | Modular end bell construction for a submersible motor unit |
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