CN117614201B - An air-cooled permanent magnet motor device - Google Patents
An air-cooled permanent magnet motor deviceInfo
- Publication number
- CN117614201B CN117614201B CN202311574366.5A CN202311574366A CN117614201B CN 117614201 B CN117614201 B CN 117614201B CN 202311574366 A CN202311574366 A CN 202311574366A CN 117614201 B CN117614201 B CN 117614201B
- Authority
- CN
- China
- Prior art keywords
- stator
- rotor
- motor
- permanent magnet
- air
- 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.)
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Links
Classifications
-
- 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
-
- 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
- H02K1/20—Stationary 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
- 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
- H02K5/20—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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
本发明公开了一种风冷永磁电机装置，包括电机定子、电机转子和永磁电机机壳，端部壳体和中部壳体上分别设置有冷空气入口和热空气出口，电机转子上还设置有转子径向通风孔，冷却空气通过冷空气入口进入电机定子两端，小部分从定转子气隙流向电机定子，大部分从转子径向通风孔流向电机定子，从中部壳体的热空气出口流出，通过强迫风冷的形式对电机装置进行冷却；本发明对冷却结构进行优化，降低风路的风阻，优化冷却的均匀性，为电机的转子和定子提供更好的冷却效果。
The present invention discloses an air-cooled permanent magnet motor device, comprising a motor stator, a motor rotor and a permanent magnet motor casing. The end casing and the middle casing are respectively provided with a cold air inlet and a hot air outlet. The motor rotor is also provided with rotor radial ventilation holes. Cooling air enters the two ends of the motor stator through the cold air inlet, a small part of it flows to the motor stator from the stator-rotor air gap, and most of it flows to the motor stator from the rotor radial ventilation holes and flows out from the hot air outlet of the middle casing. The motor device is cooled by forced air cooling. The present invention optimizes the cooling structure, reduces the wind resistance of the air path, optimizes the cooling uniformity, and provides a better cooling effect for the rotor and stator of the motor.
Description
Technical Field
The invention belongs to the field of motors, and particularly relates to an air-cooled permanent magnet motor device.
Background
With the enlargement and power of the motor apparatus, the heat dissipation problem of the motor apparatus is more prominent due to the power increase.
The traditional cooling mode is axial forced air cooling, the cooling channel is a stator-rotor air gap, the cooling area is an air gap surface of a stator and a rotor, the cooling direction is axial forced air from one end of the stator to the other end, the defects of large wind resistance, uneven heat dissipation and the like are overcome, and the large-scale development of the motor device is greatly limited.
Disclosure of Invention
The invention provides an air-cooled permanent magnet motor device which can reduce the heating value of a rotor part, optimize a cooling structure, reduce the wind resistance of a wind path, optimize the cooling uniformity and provide a better cooling effect.
The technical scheme includes that the air-cooled permanent magnet motor device comprises a motor stator, a motor rotor and a permanent magnet motor shell composed of a driving end cover, an end shell, a middle shell and a non-driving end cover, wherein a cold air inlet and a hot air outlet are respectively arranged on the end shell and the middle shell, a rotor radial vent hole is also arranged on the motor rotor, cooling air enters two ends of the motor stator through the cold air inlet of the end shell, a small part flows from an air gap of the stator to the motor stator, a large part flows from the rotor radial vent hole to the motor stator, flows out from the hot air outlet of the middle shell, and the motor device is cooled in a forced air cooling mode.
The motor stator of the air-cooled permanent magnet motor device is composed of a stator core, windings, end pressing plates, stator pull rods and stator supporting sheets for ventilation, wherein the stator core and the stator supporting sheets are distributed at intervals and fixed through the stator pull rods and the end pressing plates, and the windings are embedded in the stator core.
The motor rotor of the air-cooled permanent magnet motor device consists of a rotating shaft, a bracket, a magnetic pole box, a permanent magnet, a rotor pull rod and a rotor supporting piece aligned with a stator supporting piece, wherein a radial ventilation opening is arranged on the bracket, and the permanent magnet is aligned with a stator iron core.
The radial ventilation opening of the air-cooled permanent magnet motor device is positioned at the dovetail bulge of the bracket and is positioned on the same axial plane with the stator support sheet.
The motor rotor of the air-cooled permanent magnet motor device further comprises a sealing assembly, wherein the sealing assembly, the rotating shaft, the driving end cover, the end part shell, the middle shell and the non-driving end cover form a sealed cavity, external water is prevented from entering the shell, and meanwhile cooling air can be circulated according to a designed air path.
In the air-cooled permanent magnet motor device, a permanent magnet and a magnetic pole box are bonded through glue, and the magnetic pole box is connected with a bracket through a bolt.
In the air-cooled permanent magnet motor device, the bracket is a radial plate, the radial plate is required to avoid the installation position of the permanent magnet bolt, and the radial plate can be opened into an intermittent type or through-type on two sides.
The invention has the beneficial effects that the motor device is cooled by the forced air cooling mode, the cooling air path is used for cooling the rotor through the end part of the stator, the stator air gap channel and the rotor radial channel, then the stator is cooled through the stator slot plate channel, and finally the cooling air flows from the stator core radial channel to the middle casing outlet, so that the cooling of the motor device is realized.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an air flow direction of the present invention;
FIG. 3 is a schematic diagram of the stator of the motor of the present invention;
FIG. 4 is a schematic view of the structure of the motor rotor of the present invention;
FIG. 5 illustrates stator and rotor spacer positions according to the present invention;
FIG. 6 is a profile view of a rotor blade according to the present invention;
the stator and rotor strut positions specifically contemplated in FIG. 7
FIG. 8 is a schematic view of the structure of the rotor vent and compacts of the present invention;
FIG. 9 is a schematic view of the structure of the rotor frame of the present invention;
FIG. 10 is a schematic view of the structure of the web at the rotor vents of the present invention.
The motor comprises the following components of a 1-motor stator, a 1-stator core, a 1-2-winding, a 1-3-stator supporting piece, a 1-4-end pressing plate, a 1-5-stator pull rod, a 2-motor rotor, a 2-1-rotating shaft, a 2-sealing component, a 2-3-bracket, a 2-4-magnetic pole box, a 2-5-permanent magnet, a 2-6-rotor supporting piece, a 2-7-pressing piece, a 2-8-rotor pull rod, a 2-9-rotor radial vent hole, a 3-permanent magnet motor shell, a 3-1-drive end cover, a 3-2-end cover, a 3-middle cover and a 3-4-non-drive end cover.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. For example, although the various components in the figures are drawn to a particular scale, these scale relationships are merely exemplary and may be adjusted as needed by one skilled in the art to suit a particular application.
It should be noted that, in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "inner", "outer", and the like indicate directions or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured or operated in a specific orientation, and thus should not be construed as limiting the present invention.
In addition, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or connected internally between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
According to one example of the present invention, referring to fig. 1, an air-cooled permanent magnet motor apparatus includes a motor stator 1, a motor rotor 2, and a permanent magnet motor housing 3. The motor stator 1 is arranged on the permanent magnet motor shell 3, the motor rotor 2 and the motor stator 1 are assembled, and finally, the end cover is arranged to form the permanent magnet motor device.
The motor stator 1 comprises a stator core 1-1, a winding 1-2, an end pressing plate 1-4, a stator pull rod 1-5 and stator supporting sheets 1-3 used for ventilation, wherein the stator core 1-1 and the stator supporting sheets 1-3 are distributed at intervals, the winding 1-2 is embedded in the stator core 1-1 through the stator pull rod 1-5 and the end pressing plate 1-4, the stator supporting sheets 1-3 are of a ventilation structure of a stator, the height of each supporting sheet is recommended to be 6-10 mm for ensuring the fluidity of air, the installation of each supporting sheet is recommended to be 120-150 degrees, and the angle of each supporting sheet is recommended to be 120-150 degrees as shown in fig. 3.
The motor rotor 2 consists of a rotating shaft 2-1, a bracket 2-3, magnetic pole boxes 2-4, permanent magnets 2-5, a rotor pull rod 2-8 and rotor support sheets 2-6 aligned with the stator support sheets 1-3, wherein the rotating shaft 2-1 is connected with the bracket 2-3, the permanent magnets 2-5 are connected with the magnetic pole boxes 2-4 first, the magnetic pole boxes 2-4 are arranged on the rotor bracket 2-3, the rotor support sheets 2-6 and the magnetic pole boxes 2-4 are alternately distributed, the magnetic pole boxes 2-4 and the rotor support sheets 2-6 are fixed through the pull rod, a pressing block 2-7 can be added in the circumferential direction of the magnetic pole boxes 2-4 for limiting, and a sealing group is arranged on the rotating shaft 2-1 to form a ventilation structure of the permanent magnet motor rotor 2, a radial plate of the bracket 2-3 and a ventilation hole site rotor.
As shown in fig. 4. The bracket 2-3 is provided with a radial ventilation opening, the permanent magnet 2-5 is aligned with the stator core 1-1, and the thicknesses of the rotor support sheet 2-6 and the stator support sheet 1-3 are the same as shown in figure 5. The rotor support sheet 2-6 should have better strength, and can be designed into a bracket 2-3 or a solid body, as shown in fig. 6. Considering that the electromagnetic field changes caused by the axial movement of the rotating shaft 2-1, the thickness of the rotor support piece 2-6 is correspondingly reduced by 1-2 mm when the two ends of each section of permanent magnet 2-5 are increased by 0.5-1 mm, as shown in fig. 7. In particular, the magnets may not be segmented or the magnets may fill the position of the rotor support plates 2-6.
The permanent magnet motor shell 3 consists of a driving end cover 3-1, an end shell 3-2, a middle shell 3-3 and a non-driving end cover 3-4. The end part shell 3-2 and the middle part shell 3-3 are respectively provided with a cold air inlet and a hot air outlet, the motor rotor 2 is also provided with rotor radial vent holes 2-9, the cold air enters the two ends of the motor stator 1 through the cold air inlet of the end part shell 3-2, a small part flows into the motor stator 1 from the stator-rotor air gap, a large part flows into the motor stator 1 from the rotor radial vent holes 2-9, flows out from the hot air outlet of the middle part shell 3-3, cools the rotor through the stator end part, the stator air gap channel and the rotor radial channel, cools the stator through the stator slot plate channel, and finally flows to the middle part shell outlet from the stator core 1-1 radial channel, so that forced air cooling is realized, as shown in figure 2.
The permanent magnet motor shell 3 is distributed left and right, the end shell 3-2 is an air inlet, the middle shell 3-3 is an air outlet, the driving end cover 3-1, the end shell 3-2, the middle shell 3-3, the non-driving end cover 3-4, the rotating shaft 2-1 and the sealing component 2-2 form a sealed cavity, external water is prevented from entering the shell, and meanwhile cooling air can be circulated according to a designed air path.
The radial ventilation opening is positioned at the dovetail bulge of the bracket 2-3 and is positioned on the same axial plane with the stator support sheet 1-3. The radial vent holes may be circular or rectangular in shape, as shown in fig. 8, for processing.
The permanent magnet 2-5 and the magnetic pole box 2-4 are bonded through glue, the magnetic pole box 2-4 is connected with the bracket 2-3 through bolts, the magnetic pole box 2-4 can also press the block 2-7 for limiting, but the block 2-7 should not block the position of the radial vent hole, as shown in fig. 8.
The bracket 2-3 is of a spoke plate type, the spoke plate should avoid the installation position of the permanent magnet 2-5 bolts, so that the installation and maintenance of the bolts are facilitated, and meanwhile, the air circulation of the rotor air channel is increased when the bracket 2-3 rotates, as shown in fig. 9. In particular, when the radial ventilation holes are blocked by the web to avoid the installation position of the permanent magnet 2-5 bolts, the web can be opened into an intermittent or two-sided through type, as shown in fig. 10, so as to ensure the uniformity of the radial ventilation of the rotor
The air-cooled permanent magnet motor device optimizes the cooling structure, reduces wind resistance of a wind path, optimizes cooling uniformity and provides better cooling effect for a rotor and a stator of the motor.
Mainly, the permanent magnet motor device is cooled by forced air cooling. The cooling air path of the air-cooled permanent magnet motor device is to cool the rotor through the end part of the stator, the stator air gap channel and the rotor radial channel by air inlet from the end part shell 3-2, then cool the stator through the stator slot plate channel, and finally flow from the stator core 1-1 radial channel to the middle shell outlet as shown in fig. 2.
In particular, heat is dissipated by convection between the structural member and the water. If the air-cooled permanent magnet motor device is soaked in water, a stator of the motor device is thermally conducted to the outer surface of the shell, the outer surface of the shell can radiate heat through convection with water, and a rotor of the motor device is thermally conducted to the outer surface of the rotating shaft 2-1, and radiates heat through convection with water.
The above examples merely illustrate the principles of the present invention and its effectiveness, and examples of partial use, and other embodiments of the dimensions and forms of the rotor support plates 2-6, the dimensions and forms of the stator support plates 1-3, the forms of the press blocks 2-7, etc. should be within the scope of this patent, and it is within the scope of this patent that those skilled in the art may make several variations and modifications without departing from the inventive concept.
Claims (4)
1. A wind cooling permanent magnet motor device is characterized by comprising a motor stator (1), a motor rotor (2), and a permanent magnet motor shell (3) consisting of a driving end cover (3-1), an end shell (3-2), a middle shell (3-3) and a non-driving end cover (3-4), wherein a cold air inlet and a hot air outlet are respectively arranged on the end shell (3-2) and the middle shell (3-3), the motor rotor (2) is provided with a rotor radial vent hole (2-9), cooling air enters two ends of the motor stator (1) through the cold air inlet, part flows from a stator air gap to the motor stator (1), part flows from the rotor radial vent hole (2-9) to the motor stator (1), flows from a hot air outlet to cool the motor, the motor stator (1) consists of a stator core (1-1), a winding (1-2), an end pressure plate (1-4), a stator pull rod (1-5) and a stator support sheet (1-3) for fixing the stator core (1-1) and the stator support sheet (1-3) at intervals through the stator pressure plate (1-3), the motor rotor (2) is formed by a rotating shaft (2-1), a bracket (2-3), a magnetic pole box (2-4), a permanent magnet (2-5), a rotor pull rod (2-8) and rotor support sheets (2-6) aligned with the stator support sheets (1-3), radial vent holes (2-9) are formed in the bracket (2-3), the bracket (2-3) is a radial plate, the radial plate can be opened to be of a discontinuous type or a two-sided through type, the permanent magnet (2-5) and the stator core (1-1) are aligned, the rotor support sheets (2-6) and the magnetic pole boxes (2-4) are alternately distributed, the magnetic pole boxes (2-4) and the rotor support sheets (2-6) are fixed through the pull rod, the magnetic pole boxes (2-4) are circumferentially limited through pressing blocks (2-7), and a sealing group is arranged on the rotating shaft (2-1) to form the radial plate of the bracket (2-3) and the vent hole structure of the rotor.
2. An air-cooled permanent magnet motor device according to claim 1, wherein the radial ventilation holes (2-9) are positioned at dovetail protrusions of the bracket (2-3) and are positioned on the same axial plane with the stator support sheets (1-3).
3. An air-cooled permanent magnet motor device according to claim 2, wherein the motor rotor (2) further comprises a sealing assembly (2-2), and the sealing assembly (2-2), the rotating shaft (2-1), the driving end cover (3-1), the end housing (3-2), the middle housing (3-3) and the non-driving end cover (3-4) form a sealed cavity.
4. An air-cooled permanent magnet motor device according to claim 1, wherein the permanent magnet (2-5) is bonded to the magnetic pole box (2-4) by glue, and the magnetic pole box (2-4) is connected to the bracket (2-3) by bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311574366.5A CN117614201B (en) | 2023-11-23 | 2023-11-23 | An air-cooled permanent magnet motor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311574366.5A CN117614201B (en) | 2023-11-23 | 2023-11-23 | An air-cooled permanent magnet motor device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117614201A CN117614201A (en) | 2024-02-27 |
| CN117614201B true CN117614201B (en) | 2025-10-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311574366.5A Active CN117614201B (en) | 2023-11-23 | 2023-11-23 | An air-cooled permanent magnet motor device |
Country Status (1)
| Country | Link |
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| CN (1) | CN117614201B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769356A (en) * | 2011-05-05 | 2012-11-07 | 株洲南车时代电气股份有限公司 | Permanent magnet synchronous traction motor with air cooling structure and air cooling method of permanent magnet synchronous traction motor |
| WO2022027742A1 (en) * | 2020-08-03 | 2022-02-10 | 华中科技大学 | Integrated air-cooled axial flux motor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023217B (en) * | 2012-12-18 | 2015-06-10 | 上海电机学院 | Overall machine wind path structure of high-power and high-peed permanent magnet synchronous motor |
| CN106160315A (en) * | 2016-08-02 | 2016-11-23 | 天津飞旋科技研发有限公司 | The pure air-cooled heat dissipation structure of magnetic suspension motor with two impellers |
| CN115912729A (en) * | 2022-12-26 | 2023-04-04 | 中车永济电机有限公司 | An air-gap sealed double-air-circuit motor cooling structure |
-
2023
- 2023-11-23 CN CN202311574366.5A patent/CN117614201B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769356A (en) * | 2011-05-05 | 2012-11-07 | 株洲南车时代电气股份有限公司 | Permanent magnet synchronous traction motor with air cooling structure and air cooling method of permanent magnet synchronous traction motor |
| WO2022027742A1 (en) * | 2020-08-03 | 2022-02-10 | 华中科技大学 | Integrated air-cooled axial flux motor |
Also Published As
| Publication number | Publication date |
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| CN117614201A (en) | 2024-02-27 |
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