CN111614210A - Low-eddy-current-loss high-efficiency canned motor pump - Google Patents
Low-eddy-current-loss high-efficiency canned motor pump Download PDFInfo
- Publication number
- CN111614210A CN111614210A CN202010467549.7A CN202010467549A CN111614210A CN 111614210 A CN111614210 A CN 111614210A CN 202010467549 A CN202010467549 A CN 202010467549A CN 111614210 A CN111614210 A CN 111614210A
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- China
- Prior art keywords
- rotor
- stator
- shielding sleeve
- end cover
- powder
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- 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.)
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/26—Rotor cores with slots for windings
- H02K1/265—Shape, form or location of the slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention belongs to the technical field of electric pumps, and particularly relates to a low-eddy-current-loss high-efficiency canned motor pump. The effective non-magnetic-conduction gap between the stator and the rotor can be reduced, and the magnetic flux density of the motor is improved. The motor stator is composed of a pump shell, a front end cover, a motor shell, a stator winding, a stator core assembly, a stator core, a stator shielding sleeve, a rotor assembly, a rotor core, a rotor shielding sleeve, a rotor winding, a rotor shielding sleeve end plate, a thrust disc, a rotating shaft, a rear end cover and an O-shaped sealing ring. The stator iron core assembly comprises a stator iron core, a stator winding and a stator shielding sleeve 7 and is arranged in the motor shell; the stator shielding sleeve is cylindrical, and is pressed into the front end cover and the rear end cover, and the two ends of the front end cover and the rear end cover are matched and sealed with the O-shaped sealing ring; the rotor assembly comprises a rotor core, a rotor winding, a rotor shielding sleeve, a rotor shielding end plate, a shaft and a thrust disc; the rotor shielding sleeve is cylindrical, and two ends of the rotor shielding sleeve are matched and sealed with the stainless steel rotor shielding end plate after being pressed into the excircle of the rotor core.
Description
Technical Field
The invention belongs to the technical field of electric pumps, and particularly relates to a low-eddy-current-loss high-efficiency canned motor pump.
Background
The shielding electric pump which is generally adopted at present is a non-leakage pump which is formed by a shielding electric motor and a pump into an integral structure, and the most remarkable characteristic is that the inner surface of a stator and the outer surface of a rotor of a driving motor of the shielding electric pump are provided with cylindrical shielding sleeves made of metal materials. Early bushings were made of non-magnetically conductive materials, which actually increased the equivalent electromagnetic air gap between the stator and rotor, which could be 2-5 times the air gap of a conventional motor, resulting in a shielded motor power factor of 10% lower than a conventional motor of the same power and same number of poles.
In order to improve the power factor of a shielded motor, a shield sleeve made of a magnetically conductive material is applied to the shielded motor. Compared with a non-magnetic material shielding sleeve, the magnetic material shielding sleeve can obviously improve the overall efficiency and power factor of the canned motor pump. However, the shielding sleeve made of non-magnetic conductive material or the shielding sleeve made of magnetic conductive material mostly belongs to metal materials, so that eddy current loss generated in the shielding sleeve by the alternating magnetic field of the motor is not completely eliminated, namely, the energy consumption problem of the canned motor pump is not completely solved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the low-eddy-current-loss high-efficiency canned motor pump.
In order to achieve the purpose, the invention adopts the following technical scheme that the pump comprises a pump shell, a front end cover, a motor shell, a stator winding, a stator core assembly, a stator core, a stator shielding sleeve, a rotor assembly, a rotor core, a rotor shielding sleeve, a rotor winding, a rotor shielding sleeve end plate, a thrust disc, a rotating shaft, a rear end cover and an O-shaped sealing ring; the stator core assembly comprises a stator core, a stator winding and a stator shielding sleeve, and is arranged in a motor shell; the stator shielding sleeve is cylindrical, and the two ends of the pressed front end cover and the pressed rear end cover are matched and sealed with the O-shaped sealing ring.
The rotor assembly comprises a rotor core, a rotor winding, a rotor shielding sleeve, a rotor shielding end plate, a shaft and a thrust disc; the rotor shielding sleeve is cylindrical, and two ends of the rotor shielding sleeve are matched and sealed with the stainless steel rotor shielding end plate after being pressed into the excircle of the rotor core.
Furthermore, the stator core is manufactured by stamping a slot with a thickness of 0.5mm and painting, then laminating, the stator winding is wound by an enameled wire according to a designed winding form, and is subjected to paint dipping insulation treatment after being embedded into the slot stamped by the stator core; grooves are arranged in the front end cover and the rear end cover and O-shaped sealing rings are placed in the grooves.
Furthermore, the rotor core is manufactured by punching and laminating a silicon steel sheet with the thickness of 0.5mm, and the rotor winding is formed into a loop by putting a conductive material into a rotor slot punched on the rotor core.
Further, the rotating shaft is made of Cr18Ni9Ti or Cr17Ni2The round steel is made by turning and grinding.
Furthermore, the rotor shielding sleeve and the stator shielding sleeve are both made of composite materials, and the composite materials are formed by mixing high-resistivity materials and high-permeability materials according to a certain proportion and processing through injection molding, blow molding, extrusion and sintering.
Furthermore, the doping ratio of the high-resistivity material and the high-permeability material is determined by the performance index of the shielding electric pump, and the magnetic permeability and the electric conductivity of the shielding sleeve can be regulated and controlled through the doping ratio.
Further, performance metrics for canned electric pumps include criteria such as efficiency, power factor, overload capability, starting capability, and starting current.
Furthermore, the high resistivity material and the high magnetic permeability material are doped in a powder state, and the powder is in a nanometer level.
Further, the high resistivity material includes engineering plastic Polyamide (PA) powder, engineering plastic acrylonitrile-butadiene-styrene plastic (ABS) powder, engineering Plastic Polypropylene (PP) powder, Boron Nitride (BN) powder, and silicate-based non-metallic material glass powder.
Further, the high permeability material is preferably corrosion-resistant stainless steel SUS430 (1 Cr 17), SUS414 (1 Cr13Ni 2) powder, steel No. 45 powder, and soft magnetic ferrite powder.
Compared with the prior art, the invention has the beneficial effects.
The invention can reduce the effective non-magnetic-conductive gap between the stator and the rotor, improve the magnetic flux density of the motor, reduce the power loss in the electromagnetic transmission process and obviously improve the integral power factor of the canned motor pump. Meanwhile, the eddy current loss of the shielding sleeve can be reduced, the integral efficiency of the shielding electric pump is improved, and the energy-saving effect is obvious.
Drawings
The invention is further described with reference to the following figures and detailed description. The scope of the invention is not limited to the following expressions.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of a stator can.
Fig. 3 is a left side view of fig. 2.
Fig. 4 is a schematic view of a rotor can.
Fig. 5 is a left side view of fig. 4.
In the drawing, 1 pump housing; 2, a front end cover; 3 motor shell; 4 stator windings; 5 a stator core assembly; 6 a stator core; 7, a stator shielding sleeve; 8, a rotor assembly; 9 a rotor core; 10 rotor shielding sleeve; 11 a rotor winding; 12 rotor shield sleeve end plates; 13 a thrust disc; 14 a rotating shaft; 15 rear end cap; 16O-shaped sealing ring.
Detailed Description
As shown in fig. 1 to 5, the present invention is composed of a pump housing 1, a front end cap 2, a motor housing 3, a stator winding 4, a stator core assembly 5, a stator core 6, a stator shielding sleeve 7, a rotor assembly 8, a rotor core 9, a rotor shielding sleeve 10, a rotor winding 11, a rotor shielding sleeve end plate 12, a thrust disc 13, a rotating shaft 14, a rear end cap 15, and an O-ring 16.
The stator core assembly 5 includes a stator core 6, a stator winding 4, and a stator shield 7, and is installed in the motor housing 3. The stator core 6 is manufactured by punching a slot with a thickness of 0.5mm and painting, then laminating, the stator winding 4 is manufactured by winding an enameled wire according to a designed winding form, and is subjected to paint dipping and insulation treatment after being embedded into the slot punched by the stator core 6; grooves are arranged in the front end cover 2 and the rear end cover 15 and O-shaped sealing rings 16 are placed in the grooves. The stator shielding sleeve 7 is formed by mixing 70% of engineering plastic powder and 30% of magnetic conductive powder (volume ratio) and is molded into a cylinder shape with the thickness of 0.5mm through injection molding or blow molding, and the stator shielding sleeve is pressed into the two ends of the front end cover 2 and the rear end cover 15 to be matched and sealed with O-shaped sealing rings 16 and 17.
Specifically, if the canned motor pump delivers a strong corrosive medium, i.e., the canned motor is required to have strong corrosion resistance, the magnetic powder used in the canned motor should have corrosion resistance.
The corrosion-resistant magnetic conductive powder is SUS430 (1 Cr 17) stainless steel magnetic conductive powder.
The corrosion-resistant magnetic conductive powder is SUS414 (1 Cr13Ni 2) stainless steel magnetic conductive powder.
If the corrosion of the transmission medium of the canned motor pump is not strong, namely the requirement on the corrosion resistance of the composite shielding sleeve is not high, common magnetic powder can be selected.
The magnetic powder is No. 45 steel magnetic powder or soft magnetic ferrite magnetic powder.
The high resistivity material is selected from engineering plastic powder. Engineering plastics Polyamide (PA) powder or engineering plastics acrylonitrile-butadiene-styrene plastics (ABS) powder or engineering Plastics Polypropylene (PP) powder or Boron Nitride (BN) powder or silicate non-metallic material glass powder can be adopted.
The shielding electric motor of the invention adopts the shielding sleeve formed by doping and mixing the high resistivity material and the high magnetic permeability material, so the invention can reduce the effective non-magnetic gap between the stator and the rotor, improve the magnetic flux density of the electric motor, reduce the power loss in the electromagnetic transmission process and obviously improve the integral power factor of the shielding electric pump. Meanwhile, the eddy current loss of the shielding sleeve can be reduced, the integral efficiency of the shielding electric pump is improved, and the energy-saving effect is obvious.
In addition, the composite shielding sleeve also has higher mechanical strength and corrosion resistance, and ensures the safety and reliability of the integral operation of the shielding electric pump. The popularization and application of the invention can thoroughly solve the problem of obtaining the full-sealed transmission of the canned motor pump by means of high energy consumption and low quality, and achieve the purposes of safety, environmental protection, energy saving and consumption reduction.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (10)
1. A low eddy current loss high-efficiency canned motor pump is composed of a pump shell, a front end cover, a motor shell, a stator winding, a stator core assembly, a stator core, a stator shielding sleeve, a rotor assembly, a rotor core, a rotor shielding sleeve, a rotor winding, a rotor shielding sleeve end plate, a thrust disc, a rotating shaft, a rear end cover and an O-shaped sealing ring; the stator core assembly comprises a stator core, a stator winding and a stator shielding sleeve, and is arranged in a motor shell; the stator shielding sleeve is cylindrical, and is pressed into the front end cover and the rear end cover, and the two ends of the front end cover and the rear end cover are matched and sealed with the O-shaped sealing ring;
the rotor assembly comprises a rotor core, a rotor winding, a rotor shielding sleeve, a rotor shielding end plate, a shaft and a thrust disc; the rotor shielding sleeve is cylindrical, and two ends of the rotor shielding sleeve are matched and sealed with the stainless steel rotor shielding end plate after being pressed into the excircle of the rotor core.
2. The low eddy current loss high efficiency canned motor pump of claim 1, wherein: the stator core is manufactured by punching a slot with a thickness of 0.5mm and painting, then laminating, the stator winding is manufactured by winding an enameled wire according to a designed winding form, and the enameled wire is embedded into the slot punched by the stator core and then is subjected to paint dipping and insulation treatment; grooves are arranged in the front end cover and the rear end cover and O-shaped sealing rings are placed in the grooves.
3. The low eddy current loss high efficiency canned motor pump of claim 1, wherein: the rotor core is manufactured by punching and laminating a silicon steel sheet with the thickness of 0.5mm, and the rotor winding is formed into a loop by putting a conductive material into a rotor slot punched on the rotor core.
4. The low eddy current loss high efficiency canned motor pump of claim 1, wherein: the rotating shaft is made of Cr18Ni9Ti or Cr17Ni2The round steel is made by turning and grinding.
5. The low eddy current loss high efficiency canned motor pump of claim 1, wherein: the rotor shielding sleeve and the stator shielding sleeve are both made of composite materials, and the composite materials are formed by mixing high-resistivity materials and high-permeability materials according to a certain proportion and processing through injection molding, blow molding, extrusion and sintering.
6. The low eddy current loss high efficiency canned motor pump of claim 5, wherein: the doping ratio of the high-resistivity material and the high-permeability material is determined by the performance index of the shielding electric pump, and the magnetic permeability and the electric conductivity of the shielding sleeve can be regulated and controlled through the doping ratio.
7. The low eddy current loss high efficiency canned motor pump of claim 6, wherein: performance criteria for canned electric pumps include criteria such as efficiency, power factor, overload capability, starting capability, and starting current.
8. The low eddy current loss high efficiency canned motor pump of claim 5 or 7, wherein: the high resistivity material and the high magnetic permeability material are doped in a powder state, and the powder is in a nanometer level.
9. The low eddy current loss high efficiency canned motor pump of claim 5, wherein: the high resistivity material includes engineering plastic polyamide powder, engineering plastic acrylonitrile-butadiene-styrene plastic powder, engineering plastic polypropylene powder, boron nitride powder and silicate non-metal material glass powder.
10. The low eddy current loss high efficiency canned motor pump of claim 1, wherein: the high permeability material is preferably corrosion-resistant stainless steel SUS430, SUS414 powder, steel No. 45 powder, and soft magnetic ferrite powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010467549.7A CN111614210B (en) | 2020-05-28 | 2020-05-28 | Low-eddy-current-loss high-efficiency canned motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010467549.7A CN111614210B (en) | 2020-05-28 | 2020-05-28 | Low-eddy-current-loss high-efficiency canned motor pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111614210A true CN111614210A (en) | 2020-09-01 |
| CN111614210B CN111614210B (en) | 2022-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010467549.7A Active CN111614210B (en) | 2020-05-28 | 2020-05-28 | Low-eddy-current-loss high-efficiency canned motor pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN111614210B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112653268A (en) * | 2020-11-03 | 2021-04-13 | 安徽新沪屏蔽泵有限责任公司 | Rotor core, asynchronous starting permanent magnet synchronous motor and canned motor pump |
| CN113587714A (en) * | 2021-07-02 | 2021-11-02 | 大连斯频德环境设备有限公司 | Energy-saving optimization method of cooling tower |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112653268A (en) * | 2020-11-03 | 2021-04-13 | 安徽新沪屏蔽泵有限责任公司 | Rotor core, asynchronous starting permanent magnet synchronous motor and canned motor pump |
| CN113587714A (en) * | 2021-07-02 | 2021-11-02 | 大连斯频德环境设备有限公司 | Energy-saving optimization method of cooling tower |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111614210B (en) | 2022-04-01 |
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