CN114562463A - Electromagnetic speed-regulating multi-switching control centrifugal pump - Google Patents
Electromagnetic speed-regulating multi-switching control centrifugal pump Download PDFInfo
- Publication number
- CN114562463A CN114562463A CN202210226234.2A CN202210226234A CN114562463A CN 114562463 A CN114562463 A CN 114562463A CN 202210226234 A CN202210226234 A CN 202210226234A CN 114562463 A CN114562463 A CN 114562463A
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- winding
- centrifugal pump
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- 238000004804 winding Methods 0.000 claims abstract description 84
- 238000009434 installation Methods 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Images
Classifications
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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
- F04D13/0606—Canned motor 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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
Abstract
The invention discloses an electromagnetic speed-regulating multi-switching control centrifugal pump which comprises a pump body and a pump cover, wherein a stator assembly and a pump shaft rotor are arranged in a stator seal installation cavity; the stator assembly comprises a stator body and a power supply circuit, wherein the stator body is provided with a power winding and a control winding, the power winding is connected with the power supply circuit, and the control winding is connected with a controller; the controller internally comprises a work switching control module which comprises a first work position execution module, a second work position execution module and a third work position execution module and realizes the mutual switching of the work position execution modules. The stator body of the stator assembly is provided with the power winding and the control winding, the switching wiring switch assembly can realize switching operation among three wiring switch connecting positions, the first wiring switch connecting position is connected with the frequency converter, the second wiring switch connecting position corresponds to the sliding resistor, the third wiring switch connecting position corresponds to the inverter, and the purposes of double-fed operation, brushless operation and speed regulation control can be realized in a multi-mode.
Description
Technical Field
The invention relates to the technical field of centrifugal pumps, in particular to an electromagnetic speed-regulating multi-switching control centrifugal pump.
Background
The centrifugal pump is a general mechanical device which is widely applied in various departments of national economy, and the design process of the pump is separated from the design of a pumping system of a specific application project so far, and the design process is difficult to be efficiently matched with the characteristics of a system pipeline. Particularly, in a system consisting of a plurality of pumps in engineering, the problem that the pumps deviate from the design working condition and operate is particularly prominent, so that the pump efficiency is greatly reduced, the system is unstable, and the unit strongly vibrates to endanger the system safety. The traditional speed regulation method of the centrifugal pump is to use a valve and a baffle to regulate the flow, and although the speed regulation of the centrifugal pump is realized, a large amount of electric energy is wasted. The centrifugal pump is driven by a circuit, so the centrifugal pump with the speed regulation circuit has important significance for realizing the aims of energy conservation, emission reduction and the like, and the conventional centrifugal pump has single function speed regulation and cannot realize the switching of multiple working modes.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an electromagnetic speed-regulating multi-switching control centrifugal pump, wherein a stator body of a stator component is provided with a power winding and a control winding, a switching wiring switch component comprises a first wiring switch connecting position, a second wiring switch connecting position and a third wiring switch connecting position and can realize switching operation among the three wiring switch connecting positions, the first wiring switch connecting position is connected with a frequency converter, and the control of the control winding can be realized through the frequency converter, so that the purposes of double-fed operation, brushless operation and speed regulation control of the centrifugal pump can be realized; the second connection switch connection position corresponds to the sliding resistor, the third connection switch connection position corresponds to the inverter, the working mode switching can be realized through the switching connection switch assembly, the functional application and the application scene of the centrifugal pump are expanded, and the purpose of speed regulation of an internal circuit of the centrifugal pump can be realized through lower voltage.
The purpose of the invention is realized by the following technical scheme:
an electromagnetic speed-regulating multi-switching control centrifugal pump comprises a pump body and a pump cover, wherein the pump body is connected with the pump cover in a sealing mode to form a centrifugal pump cavity and a stator sealing installation cavity, and a stator assembly and a pump shaft rotor which is arranged in the stator assembly and rotates are installed in the stator sealing installation cavity; the stator assembly comprises a stator body and a power supply circuit, the stator body is provided with a power winding and a control winding, the power winding is connected with the power supply circuit, and the control winding is connected with a controller.
In order to better implement the invention, the power winding comprises a first power winding line, a second power winding line and a third power winding line, the control winding comprises a first control winding line, a second control winding line and a third control winding line, the controller is internally provided with a controlled switch, and the controlled switch is arranged between the first control winding line and the second control winding line of the control winding.
Preferably, the controller further comprises a frequency converter and a sliding resistor, wherein a switching wiring switch assembly is arranged in the controller, the switching wiring switch assembly comprises a first wiring switch connection position and a second wiring switch connection position, the frequency converter corresponds to the first wiring switch connection position, and the sliding resistor corresponds to the second wiring switch connection position.
Preferably, the present invention further includes an inverter, the switching wiring switch assembly further includes a third wiring switch connection location, and the inverter corresponds to the third wiring switch connection location.
Preferably, the controller includes a work switching control module therein, the work switching control module includes a first work position execution module, a second work position execution module, and a third work position execution module, the work switching control module is configured to implement mutual switching among the first work position execution module, the second work position execution module, and the third work position execution module, and the first work position execution module is configured to implement switching of the wiring switch assembly to the first wiring switch connection position and implement communication between the control winding and the frequency converter; the second working position execution module is used for realizing that the wiring switch assembly is switched to a second wiring switch connection position and realizing that the control winding is communicated with the sliding resistor; and the third working position execution module is used for realizing that the switching wiring switch assembly is switched to a third wiring switch connection position, realizing that the control winding is communicated with the inverter and simultaneously controlling the controlled switch to be closed.
Preferably, the frequency converter is electrically connected with the power supply circuit correspondingly.
Preferably, the inverter is electrically connected to the power supply circuit.
Preferably, the pump shaft rotor passes through the centrifugal pump cavity in a sealing mode and is axially connected with a synchronous rotating shaft, and a rotating speed monitor is mounted on the synchronous rotating shaft.
Preferably, the device further comprises a remote control center, and the remote control center is in communication connection with the controller and the rotating speed monitor respectively.
Preferably, the pump body or/and the pump cover are/is provided with a square plug screw, and the pump body is in sealing connection with the pump cover through a flange.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the stator body of the stator assembly is provided with a power winding and a control winding, the switching wiring switch assembly comprises a first wiring switch connecting position, a second wiring switch connecting position and a third wiring switch connecting position and can realize switching operation among the three wiring switch connecting positions, the first wiring switch connecting position is connected with the frequency converter, and the control winding can be regulated and controlled through the frequency converter, so that the purposes of double-fed operation, brushless operation and speed regulation control of the centrifugal pump are realized; the second connection switch connection position corresponds to the sliding resistor, the third connection switch connection position corresponds to the inverter, the working mode switching can be realized through the switching connection switch assembly, the functional application and the application scene of the centrifugal pump are expanded, and the purpose of speed regulation of an internal circuit of the centrifugal pump can be realized through lower voltage.
(2) The pump shaft rotor rotation speed monitoring device is provided with a controller, wherein the controller internally comprises a work switching control module, the work switching control module comprises a first work position execution module, a second work position execution module and a third work position execution module, the work switching control module can realize switching operation of three work modes, and meanwhile, a rotation speed monitor is arranged on a synchronous rotating shaft coaxially connected with a pump shaft rotor, so that the rotation speed of the pump shaft rotor can be monitored.
Drawings
FIG. 1 is a schematic cross-sectional view of a pump body according to the present invention;
FIG. 2 is a schematic view of the external structure of the pump body;
FIG. 3 is a schematic view of a stator assembly and a controller according to the present invention;
FIG. 4 is a schematic circuit diagram of an example of a controller implementing a doubly-fed operation;
FIG. 5 is a circuit diagram illustrating an example of the use of the controller to perform asynchronous operation;
FIG. 6 is a circuit diagram illustrating an example of the use of the controller to perform synchronous operation.
Wherein, the names corresponding to the reference numbers in the drawings are:
the method comprises the following steps of 1-a pump body, 2-a pump cover, 21-a square screw plug, 3-a pump shaft rotor, 4-a stator seal installation cavity, 5-a rotating speed monitor, 6-a stator component, 61-a power supply circuit, 62-a stator body, 63-a power winding, 64-a control winding, 7-a controller, 71-a controlled switch, 72-a switching wiring switch component, 8-a frequency converter, 9-a sliding resistor and 10-an inverter.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
examples
As shown in fig. 1 to 6, the electromagnetic speed-regulating multi-switching control centrifugal pump comprises a pump body 1 and a pump cover 2, wherein the pump body 1 or/and the pump cover 2 is/are provided with a square plug screw 21, and the pump body 1 and the pump cover 2 are hermetically connected through a flange. The pump body 1 is connected with the pump cover 2 in a sealing way to form a centrifugal pump cavity 22 (the centrifugal pump cavity 22 is an internal cavity) and a stator seal installation cavity 4 (the stator seal installation cavity 4 is a closed installation cavity formed by combining the end parts of the two ends of the pump body 1 and the pump cover 2, the stator seal installation cavity 4 in the figure 1 is only shown in position, during actual manufacturing, the space of the stator seal installation cavity 4 is large and the whole stator assembly 6 can be installed in a sealing way, the stator assembly 6 is installed in the stator seal installation cavity 4 (generally speaking, the stator assembly 6 is fixed on the pump body 1, after the pump cover 2 is covered on the pump body 1, the stator seal installation cavity 4 is matched with the stator assembly 6) and the pump shaft rotor 3 which is arranged in the stator assembly 6 to rotate, the impeller is installed in the middle part of the pump shaft rotor 3, and the rotor parts matched with the stator assemblies 6 of the stator seal installation cavity 4 are arranged at the two ends of the pump shaft rotor 3, the centrifugal pump has an inlet and an outlet. The stator assembly 6 comprises a stator body 62 and a power supply circuit 61, the stator body 62 is provided with a power winding 63 and a control winding 64, the power winding 63 is connected with the power supply circuit 61 (the power supply circuit is electrically connected with the power winding 2 of the centrifugal pump set stator 1 and supplies power for the power winding 2 of the centrifugal pump set stator 1), the control winding 64 is connected with a controller 7, and multi-switch position switching operation of several components is realized through the controller 7. Stator module 6 produces the magnetic field in the sealed installation cavity 4 of centrifugal pump both ends stator to the drive is located the rotor part rotation at pump shaft rotor 3 both ends, and 3 both ends of pump shaft rotor just rotate under the drive of stator module 6 like this, thereby whole pump shaft rotor 3 just rotates, and pump shaft rotor 3 will drive the impeller and rotate, realizes the purpose of centrifugal pump.
Referring to fig. 3, the power winding 63 includes a first power winding line (i.e., winding line a in fig. 3), a second power winding line (i.e., winding line B in fig. 3), and a third power winding line (i.e., winding line C in fig. 3), the control winding 64 includes a first control winding line (i.e., winding line a in fig. 3), a second control winding line (i.e., winding line B in fig. 3), and a third control winding line (i.e., winding line C in fig. 3), the controller 7 has a controlled switch 71 therein, and the controlled switch 71 is disposed between the first control winding line and the second control winding line of the control winding 64.
According to a preferred embodiment of this embodiment, the present invention further includes a frequency converter 8 and a sliding resistor 9, the controller 7 has a change-over connection switch assembly 72 inside, the change-over connection switch assembly 72 includes a first connection switch connection position and a second connection switch connection position, the frequency converter 8 corresponds to the first connection switch connection position, and the sliding resistor 9 corresponds to the second connection switch connection position. When the change-over wiring switch assembly 72 of the controller 7 is switched to the first wiring switch connection position, the control winding 64 and the frequency converter 8 are communicated with each other; when the change-over switch assembly 72 of the controller 7 is switched to the second connection switch connection position, the control winding 64 and the sliding resistor 9 are communicated with each other. The frequency converter 8 of this embodiment may be connected to other external power sources, and the frequency converter 8 may also be directly and correspondingly electrically connected to the power supply circuit 61, that is, the frequency converter 8 may be powered by a single power supply source, or may be directly powered by the power supply circuit 61.
According to a preferred embodiment of the present embodiment, the present invention further comprises an inverter 10, and the switching connection switch assembly 72 further comprises a third connection switch connection location, and the inverter 10 corresponds to the third connection switch connection location. When the change-over wiring switch assembly 72 of the controller 7 is switched to the third wiring switch connection position, the control winding 64 and the inverter 10 are communicated with each other. The inverter 10 may be connected to another external power source, and the inverter 10 may also be directly electrically connected to the power supply circuit 61, that is, the inverter 10 may be supplied with power by a single power supply, or may be supplied with power by transforming the power directly through the power supply circuit 61.
The controller 7 internally comprises a work switching control module, the work switching control module comprises a first work position execution module, a second work position execution module and a third work position execution module, the work switching control module is used for realizing mutual switching among the first work position execution module, the second work position execution module and the third work position execution module, and the first work position execution module is used for realizing switching of the wiring switch assembly 72 to a first wiring switch connection position and realizing communication of the control winding 64 and the frequency converter 8; the second working position execution module is used for realizing that the wiring switch assembly 72 is switched to a second wiring switch connection position and realizing that the control winding 64 is communicated with the sliding resistor 9; the third working position execution module is used for realizing that the switching wiring switch assembly 72 is switched to a third wiring switch connection position, realizing that the control winding 64 is communicated with the inverter 10 and simultaneously controlling the controlled switch 71 to be closed.
When the work switching control module switches and enables the first work position execution module to work, referring to fig. 4, the control winding 64 is connected with the frequency converter 8 (which can be regarded as a variable frequency power supply or a control power supply), and the frequency converter 8 supplies power to the control winding 64, and can achieve the purposes of double-fed operation and speed regulation control inside the centrifugal pump. When the work switching control module switches and enables the second work position execution module to work, referring to fig. 5, the control winding 64 is connected with the sliding resistor 9, and the sliding resistor 9 participates in the work, so that the purposes of asynchronous operation, self-starting and speed regulation control of the centrifugal pump circuit can be achieved. When the work switching control module switches and enables the third work position execution module to work, referring to fig. 6, the control winding 64 is connected with the inverter 10, and the inverter 10 supplies power to the control winding 64, and can achieve the purpose of synchronous operation of the centrifugal pump circuit and the like.
According to a preferred embodiment of the present embodiment, a synchronous rotating shaft is axially connected to the pump shaft rotor 3, and a rotating speed monitor 5 is mounted on the synchronous rotating shaft (the rotating speed monitor 5 may be a shaft rotating speed sensor). The invention also comprises a remote control center which is respectively in communication connection with the controller 7 and the rotating speed monitor 5. Therefore, remote communication interaction of the controller 7 and mutual switching control among the working position execution modules can be realized through a remote control center, and meanwhile, the real-time rotating speed condition of the pump shaft rotor 3 can be remotely fed back by the rotating speed monitor 5.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides an electromagnetic speed governing is many switches control centrifugal pump, includes pump body (1) and pump cover (2), its characterized in that: the pump body (1) is connected with the pump cover (2) in a sealing manner to form a centrifugal pump cavity (22) and a stator seal installation cavity (4), and a stator assembly (6) and a pump shaft rotor (3) which is arranged in the stator assembly (6) to rotate are installed in the stator seal installation cavity (4); stator module (6) are including stator body (62), supply circuit (61), and stator body (62) have power winding (63) and control winding (64), and power winding (63) are connected with supply circuit (61), and control winding (64) are connected with controller (7).
2. An electromagnetic speed-regulating multi-switching control centrifugal pump according to claim 1, characterized in that: the power winding (63) comprises a first power winding line, a second power winding line and a third power winding line, the control winding (64) comprises a first control winding line, a second control winding line and a third control winding line, the controller (7) is internally provided with a controlled switch (71), and the controlled switch (71) is arranged between the first control winding line and the second control winding line of the control winding (64).
3. An electromagnetic speed-regulating multi-switching control centrifugal pump according to claim 2, characterized in that: still include converter (8) and sliding resistance (9), controller (7) inside has switching wiring switch subassembly (72), and switching wiring switch subassembly (72) include first wiring switch connection position, second wiring switch connection position, converter (8) correspond with first wiring switch connection position, sliding resistance (9) correspond with second wiring switch connection position.
4. An electromagnetic speed-regulating multi-switching control centrifugal pump according to claim 3, characterized in that: the switching wiring switch assembly (72) further comprises a third wiring switch connecting position, and the inverter (10) corresponds to the third wiring switch connecting position.
5. An electromagnetic speed-regulating multi-switching control centrifugal pump according to claim 4, characterized in that: the controller (7) internally comprises a work switching control module, the work switching control module comprises a first work position execution module, a second work position execution module and a third work position execution module, the work switching control module is used for realizing mutual switching among the first work position execution module, the second work position execution module and the third work position execution module, and the first work position execution module is used for realizing switching of the wiring switch component (72) to the first wiring switch connection position and realizing communication of the control winding (64) and the frequency converter (8); the second working position execution module is used for realizing that the wiring switch component (72) is switched to a second wiring switch connection position and realizing that the control winding (64) is communicated with the sliding resistor (9); and the third working position execution module is used for realizing that the switching wiring switch assembly (72) is switched to a third wiring switch connection position, realizing that the control winding (64) is communicated with the inverter (10) and simultaneously controlling the controlled switch (71) to be closed.
6. An electromagnetic speed-regulating multi-switching control centrifugal pump according to claim 5, characterized in that: the frequency converter (8) is correspondingly and electrically connected with the power supply circuit (61).
7. An electromagnetic speed-regulating multi-switching control centrifugal pump according to claim 5, characterized in that: the inverter (10) is electrically connected to a power supply circuit (61).
8. An electromagnetic speed-regulating multi-switching control centrifugal pump according to claim 5, characterized in that: and the pump shaft rotor (3) is axially connected with a synchronous rotating shaft, and a rotating speed monitor (5) is installed on the synchronous rotating shaft.
9. An electromagnetic speed-regulating multi-switching control centrifugal pump according to claim 8, characterized in that: the device is characterized by further comprising a remote control center, wherein the remote control center is in communication connection with the controller (7) and the rotating speed monitor (5) respectively.
10. An electromagnetic speed-regulating multi-switching control centrifugal pump according to claim 1, characterized in that: the pump body (1) or/and the pump cover (2) are/is provided with a square plug screw (21), and the pump body (1) is connected with the pump cover (2) in a sealing mode through a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210226234.2A CN114562463A (en) | 2022-03-08 | 2022-03-08 | Electromagnetic speed-regulating multi-switching control centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210226234.2A CN114562463A (en) | 2022-03-08 | 2022-03-08 | Electromagnetic speed-regulating multi-switching control centrifugal pump |
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| Publication Number | Publication Date |
|---|---|
| CN114562463A true CN114562463A (en) | 2022-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210226234.2A Pending CN114562463A (en) | 2022-03-08 | 2022-03-08 | Electromagnetic speed-regulating multi-switching control centrifugal pump |
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| Country | Link |
|---|---|
| CN (1) | CN114562463A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2066793C1 (en) * | 1995-06-20 | 1996-09-20 | Гуськов Игорь Алексеевич | Centrifugal pumping unit |
| CN2427662Y (en) * | 2000-05-12 | 2001-04-25 | 西南交通大学 | Energy-saving type integrated hydraulic source |
| JP2001145388A (en) * | 1999-11-16 | 2001-05-25 | Hitachi Service & Engineering (East) Ltd | Control system of wire-wound motor |
| CN201146479Y (en) * | 2008-01-16 | 2008-11-05 | 中国矿业大学 | Starting device for brushless double-feeding motor |
| WO2011061112A1 (en) * | 2009-11-17 | 2011-05-26 | Ksb Aktiengesellschaft | Rotary pump arrangement having a controller and/or regulator |
| EP2778423A1 (en) * | 2013-03-11 | 2014-09-17 | Grundfos Holding A/S | Centrifugal pump assembly |
| CN109088528A (en) * | 2017-06-13 | 2018-12-25 | 江门市甜的电器有限公司 | The micro centrifugal pump of U-iron core single-phase permanent-magnet synchronous motor driving |
| US20200067376A1 (en) * | 2017-10-25 | 2020-02-27 | Flowserve Management Company | Compact, modular, pump or turbine with integral modular motor or generator and coaxial fluid flow |
| CN112879313A (en) * | 2021-01-22 | 2021-06-01 | 东北石油大学 | Submersible centrifugal pump with integrated pump |
-
2022
- 2022-03-08 CN CN202210226234.2A patent/CN114562463A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2066793C1 (en) * | 1995-06-20 | 1996-09-20 | Гуськов Игорь Алексеевич | Centrifugal pumping unit |
| JP2001145388A (en) * | 1999-11-16 | 2001-05-25 | Hitachi Service & Engineering (East) Ltd | Control system of wire-wound motor |
| CN2427662Y (en) * | 2000-05-12 | 2001-04-25 | 西南交通大学 | Energy-saving type integrated hydraulic source |
| CN201146479Y (en) * | 2008-01-16 | 2008-11-05 | 中国矿业大学 | Starting device for brushless double-feeding motor |
| WO2011061112A1 (en) * | 2009-11-17 | 2011-05-26 | Ksb Aktiengesellschaft | Rotary pump arrangement having a controller and/or regulator |
| EP2778423A1 (en) * | 2013-03-11 | 2014-09-17 | Grundfos Holding A/S | Centrifugal pump assembly |
| CN109088528A (en) * | 2017-06-13 | 2018-12-25 | 江门市甜的电器有限公司 | The micro centrifugal pump of U-iron core single-phase permanent-magnet synchronous motor driving |
| US20200067376A1 (en) * | 2017-10-25 | 2020-02-27 | Flowserve Management Company | Compact, modular, pump or turbine with integral modular motor or generator and coaxial fluid flow |
| CN112879313A (en) * | 2021-01-22 | 2021-06-01 | 东北石油大学 | Submersible centrifugal pump with integrated pump |
Non-Patent Citations (1)
| Title |
|---|
| 龙村: "《体外循环学》", vol. 1, 29 February 2004, 北京：人民军医出版社, pages: 256 - 258 * |
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