CN116961285A - Permanent magnet motor - Google Patents
Permanent magnet motor Download PDFInfo
- Publication number
- CN116961285A CN116961285A CN202310915009.4A CN202310915009A CN116961285A CN 116961285 A CN116961285 A CN 116961285A CN 202310915009 A CN202310915009 A CN 202310915009A CN 116961285 A CN116961285 A CN 116961285A
- Authority
- CN
- China
- Prior art keywords
- rotor
- permanent magnet
- shell
- air
- magnet motor
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 239000004519 grease Substances 0.000 claims description 3
- 241000883990 Flabellum Species 0.000 claims description 2
- 230000001050 lubricating effect Effects 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims 1
- 239000000428 dust Substances 0.000 description 17
- 238000001816 cooling Methods 0.000 description 11
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 5
- 229910001172 neodymium magnet Inorganic materials 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- 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
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a permanent magnet motor, which comprises a shell, a stator and a rotor, wherein the stator is fixed on the inner wall of the shell, the rotor is arranged on the inner ring of the stator, vent holes are formed in the two end faces of the shell, the permanent magnet motor further comprises a fan blade rotating together with the rotor, the rotor is provided with a wind hole penetrating through the two end faces, a sealing mechanism is arranged between the shell and the two end faces of the rotor, and the sealing mechanism seals the vent holes and the wind hole. When the rotor is used, the rotor rotates to drive the fan blades to rotate, air is sucked into one end of the shell of the motor through the air holes, then the air passes through the air holes, and heat exchange is carried out between the air and the rotor when the air passes through the air holes, so that heat on the rotor is taken away, and then the magnet on the rotor is cooled.
Description
Technical Field
The present invention relates to a permanent magnet motor.
Background
Neodymium iron boron is used as a strong magnetic material and is widely used in various permanent magnet motors at present, and as a magnetic material, each performance of the neodymium iron boron is very superior, but the only disadvantage is that the neodymium iron boron is not resistant to high temperature.
In an electric machine, neodymium iron boron is generally fixed to a rotor as a magnetic pole on the rotor. Since neodymium iron boron is not resistant to high temperatures, the motor needs to be cooled. Common modes are air cooling and liquid cooling, the liquid cooling effect is good, but the cost is high, so for some permanent magnet motors with low power, air cooling is generally adopted.
In the existing air cooling mode, a fan blade is generally fixed on a main shaft of a motor, when the motor rotates, the fan blade blows internal hot air flow out of the motor shell, and meanwhile, external cold air flow is sucked into the motor shell. For convenience, there is a great disadvantage that dust in the air enters the motor together with the air flow, and if the dust enters between the rotor and the stator of the motor, the performance of the motor is affected, and even the motor is worn out and disabled. Therefore, the conventional means is to install the filter screen at the air inlet and the air outlet of the motor, but the filter screen cannot isolate dust in the air from entering the motor, and the second filter screen can cause unsmooth air flow in and out due to dust blockage after being used for a period of time, so that frequent cleaning is also needed, and the filter screen is very troublesome.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a permanent magnet motor which can cool the motor and prevent dust from entering the opposite surface of a rotor and a stator.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a permanent magnet motor, includes shell, stator and rotor, the stator is fixed on the inner wall of shell, the rotor sets up the inner circle of stator, be provided with the air vent on the both ends face of shell, still include one with the rotor is rotatory flabellum together, the last wind hole that runs through both ends face that has of rotor, the shell with sealing mechanism has between the both ends face of rotor, sealing mechanism will the air vent with wind hole seals in. When the rotor is used, the rotor rotates to drive the fan blades to rotate, air is sucked into one end of the shell of the motor through the air holes, then the air passes through the air holes, and heat exchange is carried out between the air and the rotor when the air passes through the air holes, so that heat on the rotor is taken away, and then the magnet on the rotor is cooled. After passing through the air hole, the air flows out from the vent hole at the other end of the shell. In the whole process, due to the existence of the sealing mechanism, air flow cannot enter the area where the circumference of the rotor is opposite to the stator, so that risks such as abrasion cannot occur. Since the permanent magnet motor is most sensitive to temperature and the magnets are arranged on the rotor, cooling the rotor is equivalent to cooling the magnets, and the structure of the invention is suitable for cooling the permanent magnet motor.
In the above technical scheme, preferably, the rotor comprises a rotor core and a rotating shaft fixed in the middle of the rotor core, two ends of the rotating shaft are rotationally connected to the shell, and the magnet is arranged on the rotor core.
In the above technical solution, preferably, the vent hole is provided with a check valve, and when the rotor stops rotating, the check valve is closed. The one-way valve is closed when the motor does not operate, so that the interior of the motor is separated from the outside, and dust is prevented from entering.
In the above technical scheme, preferably, the one-way valve comprises a valve plate, one end of the valve plate is rotationally connected to the vent hole, and when the motor is closed, the valve plate is in close contact with the vent hole by means of a torsion spring. This is the most common one-way valve construction.
In the above technical scheme, preferably, the casing includes the sleeve and fixes the end cover at sleeve both ends, the both ends of pivot rotate and connect on the end cover, sealing mechanism is including setting up first retaining ring on the end cover and setting up second retaining ring on the rotor core, be provided with mutual inserted arch and recess in the overlap region between first retaining ring and the second retaining ring, have lubricating grease in the recess. This sealing means, in which the sealing surfaces do not contact each other and air cannot pass, is a preferred sealing means of the present invention.
In the above technical scheme, preferably, the fan blade is disposed on the rotating shaft, the first retainer ring encloses the outer ring of the vent hole, and the second retainer ring encloses the wind hole and the outer ring of the fan blade.
In the above technical scheme, preferably, the fan blade is fixed on an end face of the rotor core, the fan blade is rotationally connected to the first retainer ring, the vent hole is formed in an outer ring of the end cover, one end of the end cover is provided with a conical barrel, an outlet is formed in the bottom of the conical barrel, and the second retainer ring is located in the middle of the end cover. In the mechanism, air flow is sucked into the end cover in a tangential direction, after dust particles in the air flow collide with the side wall of the end cover, the speed is reduced, the direction of the cone gradually drops, and clean air from which dust is removed falls from the outlet and enters the shell from the inner ring of the second check ring. This kind of structure can purify the dust that gets into the motor, lets the dust that gets into of wind hole as far as possible, avoids the dust to cover the surface of wind hole and influences the heat dissipation.
In the above technical solution, preferably, the vent hole is disposed along a tangential direction of the end cover, and an air outlet is provided at a middle position of the second retainer ring.
The beneficial effects of the invention are as follows: after the overflow recovery device is added, the material injected into the die can be extruded out of the device under the action of the internal pressure, so that the foaming rate of the inside of the product is greatly improved, the product is lighter, and the material is saved.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
Fig. 2 is an enlarged partial schematic view of fig. 1.
Fig. 3 is a schematic structural view of embodiment 2 of the present invention.
Fig. 4 is a cross-sectional view taken along A-A of fig. 3.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
embodiment 1, see fig. 1-2, a permanent magnet motor comprises a housing 1, a stator 2 and a rotor 3, wherein the stator 2 is fixed on the inner wall of the housing 1, and the rotor 3 is arranged on the inner ring of the stator 2. The rotor comprises a rotor core and a rotating shaft fixed in the middle of the rotor core, two ends of the rotating shaft are rotationally connected to the shell, and the magnet is arranged on the rotor core.
The rotor 3 comprises a rotor core 31 and a rotating shaft 32 fixed in the middle of the rotor core 31, two ends of the rotating shaft 32 are rotatably connected to the housing 1, and a magnet 33 is arranged on the rotor core 31.
The air vent 11 is arranged on two end surfaces of the shell 1, the air vent comprises a fan blade 4 rotating together with the rotor 3, the rotor 3 is provided with an air hole 3a penetrating through the two end surfaces, a sealing mechanism 5 is arranged between the shell 1 and the two end surfaces of the rotor 3, and the sealing mechanism 5 seals the air vent 11 and the air hole 3 a.
The vent hole 11 is provided with a one-way valve 6, and when the rotor 3 stops rotating, the one-way valve 6 is closed. The one-way valve is closed when the motor does not operate, so that the interior of the motor is separated from the outside, and dust is prevented from entering. In this embodiment, the check valve 6 includes a valve plate 61, one end of the valve plate 61 is rotatably connected to the air vent 11, and when the motor is turned off, the valve plate 61 is closely contacted with the air vent 11 by means of a torsion spring 62. This is the most common one-way valve construction.
The shell 1 comprises a sleeve 12 and end covers 13 fixed at two ends of the sleeve 12, and two ends of the rotating shaft 3 are rotatably connected to the end covers 13. The sealing mechanism 5 comprises a first retainer ring 131 arranged on the end cover 13 and a second retainer ring 311 arranged on the rotor core 31, wherein a protrusion 13a and a groove 31b which are inserted into each other are arranged in an overlapped area between the first retainer ring 131 and the second retainer ring 311, and grease is arranged in the groove 31 b. This sealing means, in which the sealing surfaces do not contact each other and air cannot pass, is a preferred sealing means of the present invention.
The fan blade 4 is arranged on the rotating shaft 32, the first check ring 131 is surrounded on the outer ring of the vent hole, and the second check ring is surrounded on the air hole and the fan blade outer ring.
When the rotor is used, the rotor rotates to drive the fan blades to rotate, air is sucked into one end of the shell of the motor through the air holes, then the air passes through the air holes, and heat exchange is carried out between the air and the rotor when the air passes through the air holes, so that heat on the rotor is taken away, and then the magnet on the rotor is cooled. After passing through the air hole, the air flows out from the vent hole at the other end of the shell. In the whole process, due to the existence of the sealing mechanism, air flow cannot enter the area where the circumference of the rotor is opposite to the stator, so that risks such as abrasion cannot occur. Since the permanent magnet motor is most sensitive to temperature and the magnets are arranged on the rotor, cooling the rotor is equivalent to cooling the magnets, and the structure of the invention is suitable for cooling the permanent magnet motor.
In embodiment 2, referring to fig. 3 to 4, the fan blade 4 is fixed on an end face of the rotor core 31, the fan blade 4 is rotatably connected to the first retainer 131, the vent hole 11 is disposed on an outer ring of the end cover, one end of the end cover 13 has a conical barrel 132, a bottom of the conical barrel 132 has an outlet 13b, and the second retainer 311 is located at a middle position of the end cover, otherwise the same as embodiment 1.
In the mechanism, air flow is sucked into the end cover in a tangential direction, after dust particles in the air flow collide with the side wall of the end cover, the speed is reduced, the direction of the cone gradually drops, and clean air from which dust is removed falls from the outlet and enters the shell from the inner ring of the second check ring. This kind of structure can purify the dust that gets into the motor, lets the dust that gets into of wind hole as far as possible, avoids the dust to cover the surface of wind hole and influences the heat dissipation, but has also increased the volume that the motor occupy.
Claims (8)
1. The utility model provides a permanent magnet motor, includes shell, stator and rotor, the stator is fixed on the inner wall of shell, the rotor sets up the inner circle of stator, be provided with the air vent on the both ends face of shell, still include one with the rotor is rotatory flabellum together, its characterized in that: the rotor is provided with a wind hole penetrating through two end faces, a sealing mechanism is arranged between the shell and the two end faces of the rotor, and the sealing mechanism seals the ventilation hole and the wind hole.
2. A permanent magnet motor according to claim 1, characterized in that: the rotor comprises a rotor core and a rotating shaft fixed in the middle of the rotor core, two ends of the rotating shaft are rotationally connected to the shell, and the magnet is arranged on the rotor core.
3. A permanent magnet motor according to claim 1, characterized in that: the air vent is provided with a one-way valve, and when the rotor stops rotating, the one-way valve is closed.
4. A permanent magnet machine according to claim 3, wherein: the one-way valve comprises a valve plate, one end of the valve plate is rotationally connected to the vent hole, and the valve plate is closely contacted with the vent hole by means of a torsion spring.
5. A permanent magnet motor according to claim 1, characterized in that: the shell comprises a sleeve and end covers fixed at two ends of the sleeve, two ends of the rotating shaft are rotationally connected to the end covers, the sealing mechanism comprises a first check ring arranged on the end covers and a second check ring arranged on the rotor core, mutually inserted protrusions and grooves are arranged in an overlapping area between the first check ring and the second check ring, and lubricating grease is arranged in the grooves.
6. A permanent magnet motor according to claim 1, characterized in that: the fan blade is arranged on the rotating shaft, the first check ring is surrounded on the outer ring of the vent hole, and the second check ring is surrounded on the air hole and the outer ring of the fan blade.
7. A permanent magnet motor according to claim 1, characterized in that: the fan blade is fixed on one end face of the rotor core, the fan blade is rotationally connected to the first retainer ring, the vent hole is formed in the outer ring of the end cover, one end of the end cover is provided with a conical barrel, the bottom of the conical barrel is provided with an outlet, and the second retainer ring is located in the middle of the end cover.
8. The permanent magnet motor of claim 7 wherein: the vent holes are arranged along the tangential direction of the end cover, and the middle position of the second check ring is provided with an air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310915009.4A CN116961285A (en) | 2023-07-25 | 2023-07-25 | Permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310915009.4A CN116961285A (en) | 2023-07-25 | 2023-07-25 | Permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116961285A true CN116961285A (en) | 2023-10-27 |
Family
ID=88456069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310915009.4A Pending CN116961285A (en) | 2023-07-25 | 2023-07-25 | Permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116961285A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202026203U (en) * | 2011-05-05 | 2011-11-02 | 株洲南车时代电气股份有限公司 | Permanent magnetic synchronized traction motor with air cooling structure |
| CN104539078A (en) * | 2014-12-03 | 2015-04-22 | 胡超 | Permanent magnet brushless motor comprising rotor with dustproof structure |
| CN107528423A (en) * | 2017-10-17 | 2017-12-29 | 广州市香港科大***研究院 | A kind of small-size wind power-generating closed permanent magnet generator |
| CN108599513A (en) * | 2018-06-21 | 2018-09-28 | 许昌市大力电机制造有限公司 | A kind of permanent magnetic brushless with long service life |
| CN208608799U (en) * | 2018-02-09 | 2019-03-15 | 重庆新登奇机电技术有限公司 | A kind of permanent magnet synchronous servo motor rotor structure |
| CN111342613A (en) * | 2020-03-10 | 2020-06-26 | 杭州益众节能环保科技有限公司 | Cooling structure for permanent magnet motor |
| CN112366865A (en) * | 2020-11-18 | 2021-02-12 | 江西力玛机电科技有限公司 | Turbine heat dissipation type permanent magnet motor rotor |
| JP2021197826A (en) * | 2020-06-15 | 2021-12-27 | 株式会社日立インダストリアルプロダクツ | Rotating machine |
| CN113937953A (en) * | 2021-10-22 | 2022-01-14 | 中车株洲电机有限公司 | Active air supply cooling permanent magnet motor and electric locomotive |
| CN215939442U (en) * | 2021-08-11 | 2022-03-04 | 鑫田(烟台)机电科技有限公司 | Dust removing device |
-
2023
- 2023-07-25 CN CN202310915009.4A patent/CN116961285A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202026203U (en) * | 2011-05-05 | 2011-11-02 | 株洲南车时代电气股份有限公司 | Permanent magnetic synchronized traction motor with air cooling structure |
| CN104539078A (en) * | 2014-12-03 | 2015-04-22 | 胡超 | Permanent magnet brushless motor comprising rotor with dustproof structure |
| CN107528423A (en) * | 2017-10-17 | 2017-12-29 | 广州市香港科大***研究院 | A kind of small-size wind power-generating closed permanent magnet generator |
| CN208608799U (en) * | 2018-02-09 | 2019-03-15 | 重庆新登奇机电技术有限公司 | A kind of permanent magnet synchronous servo motor rotor structure |
| CN108599513A (en) * | 2018-06-21 | 2018-09-28 | 许昌市大力电机制造有限公司 | A kind of permanent magnetic brushless with long service life |
| CN111342613A (en) * | 2020-03-10 | 2020-06-26 | 杭州益众节能环保科技有限公司 | Cooling structure for permanent magnet motor |
| JP2021197826A (en) * | 2020-06-15 | 2021-12-27 | 株式会社日立インダストリアルプロダクツ | Rotating machine |
| CN112366865A (en) * | 2020-11-18 | 2021-02-12 | 江西力玛机电科技有限公司 | Turbine heat dissipation type permanent magnet motor rotor |
| CN215939442U (en) * | 2021-08-11 | 2022-03-04 | 鑫田(烟台)机电科技有限公司 | Dust removing device |
| CN113937953A (en) * | 2021-10-22 | 2022-01-14 | 中车株洲电机有限公司 | Active air supply cooling permanent magnet motor and electric locomotive |
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