CN117458786A - Motor cooling system and permanent magnet direct-drive traction motor - Google Patents
Motor cooling system and permanent magnet direct-drive traction motor Download PDFInfo
- Publication number
- CN117458786A CN117458786A CN202311653397.XA CN202311653397A CN117458786A CN 117458786 A CN117458786 A CN 117458786A CN 202311653397 A CN202311653397 A CN 202311653397A CN 117458786 A CN117458786 A CN 117458786A
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- Prior art keywords
- end cover
- chamber
- rotor assembly
- air
- cooling system
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Links
- 238000001816 cooling Methods 0.000 title claims abstract description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 8
- 230000003137 locomotive effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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
- H02K1/22—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
-
- 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
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- 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)
Abstract
The invention discloses a motor cooling system and a permanent magnet direct-drive traction motor, and relates to the technical field of motor cooling. The motor cooling system comprises a rotating shaft, a rotor assembly, a stator assembly, a shell and an end cover, wherein the end cover comprises a first end cover and a second end cover which are respectively arranged at two axial ends of the rotor assembly; a first chamber is formed between the first end cover and the rotor assembly, a second chamber is formed between the second end cover and the rotor assembly, the rotor assembly is provided with a cooling air path, one end of the cooling air path is communicated with the first chamber, and the other end of the cooling air path is communicated with the second chamber; the first end cover is provided with an air inlet passage communicated with the first cavity, and the second end cover is provided with an air outlet passage communicated with the second cavity; the gas flows through the air inlet passage, the first chamber, the cooling air passage and the second chamber in sequence and flows out from the air outlet passage. The invention adopts an air cooling mode, and is applicable to cooling of the rotor component of the low-speed high-torque permanent magnet direct-drive traction motor.
Description
Technical Field
The invention relates to the technical field of motor cooling, in particular to a motor cooling system. In addition, the invention also relates to a permanent magnet direct-drive traction motor comprising the motor cooling system.
Background
The traction motor is used as a core power component of the heavy-duty freight locomotive, and a driving structure of the high-efficiency permanent magnet direct-drive traction motor is adopted, so that the transmission efficiency loss of gears can be eliminated, and the total efficiency of the locomotive is improved.
The copper consumption ratio of the low-speed and high-torque permanent magnet direct-drive traction motor stator is far higher than that of a gear transmission traction motor, the temperature of a traction motor stator winding is high under the condition that the heat dissipation capacity of a locomotive and vehicle cooling system is limited, and the heat is difficult to exchange with a high-temperature stator or a shell through internal air under the condition that the rotation speed of the traction motor is low by rotor magnetic steel, so that the cooling and heat dissipation of a rotor are difficult.
In addition, if a liquid cooling mode is used, the bearing lubrication and sealing structure of the low-speed and high-torque permanent magnet direct-drive traction motor have extremely high technical requirements, the bearing lubrication and sealing of the existing low-speed and high-torque permanent magnet direct-drive traction motor do not meet the requirements, the rotor cannot be subjected to liquid cooling, and the cooling requirements of the existing hybrid cooling mode and the existing traction motor cannot be met.
In summary, how to provide a motor cooling system suitable for a low-speed and high-torque permanent magnet direct-drive traction motor is a problem to be solved by those skilled in the art.
Disclosure of Invention
Therefore, the invention aims to provide a motor cooling system which can cool down a rotor assembly through air cooling, reduces the requirement on a sealing structure of a bearing, and is applicable to a low-speed and high-torque permanent magnet direct-drive traction motor.
Another object of the present invention is to provide a permanent magnet direct drive traction motor including the motor cooling system described above.
In order to achieve the above object, the present invention provides the following technical solutions:
the motor cooling system comprises a rotating shaft, a rotor assembly, a stator assembly, a shell and an end cover, wherein the rotor assembly is sleeved on the rotating shaft and positioned on the inner side of the stator assembly;
a first chamber is formed between the first end cover and the rotor assembly, a second chamber is formed between the second end cover and the rotor assembly, the rotor assembly is provided with a cooling air path, one end of the cooling air path is communicated with the first chamber, and the other end of the cooling air path is communicated with the second chamber; the first end cover is provided with an air inlet channel used for being communicated with the first cavity, and the second end cover is provided with an air outlet channel used for being communicated with the second cavity;
the air flows through the air inlet channel, the first chamber, the cooling air channel and the second chamber in sequence, and flows out of the air outlet channel, so that air cooling and heat dissipation of the rotor assembly are realized.
Optionally, the rotor assembly includes a rotor core and a magnetic steel embedded in the rotor core and extending along an axial direction of the rotor core, and the cooling air path is disposed in the rotor core.
Optionally, the cooling air path includes a plurality of columnar through holes, a plurality of the columnar through holes are uniformly distributed along a circumferential direction of the rotor core, and the columnar through holes penetrate through the rotor core in the circumferential direction of the rotor core.
Optionally, the air inlet path is arranged at a position on the upper part of the first end cover, and the air outlet path is arranged at a position on the lower part of the second end cover.
Optionally, the air inlet includes a plurality of first channels communicating with the first chamber;
the air outlet passage comprises a plurality of second channels communicated with the second chamber.
Optionally, a space between adjacent first channels is provided;
and a space between adjacent second channels is arranged.
Optionally, the shell is provided with a water channel, a water inlet communicated with the water channel and a water outlet communicated with the water channel; the waterway extends axially of the housing.
Optionally, the shell comprises an outer water jacket and an inner water jacket, the outer water jacket is sleeved outside the inner water jacket, and a cavity between the outer water jacket and the inner water jacket forms the water channel; the water inlet and the water outlet are both arranged on the outer water jacket.
Optionally, the first end cover is provided with a first extension part and a second extension part, the first extension part is arranged on one side of the first end cover facing the rotor assembly and extends along the axial direction of the rotating shaft in a direction approaching the rotor assembly, and the second extension part is arranged on the inner side surface of the first end cover and extends along the radial direction of the rotating shaft in a direction approaching the rotating shaft; the first extending part, the second extending part, the rotating shaft and the rotor assembly are surrounded to form the first cavity;
the second end cover is provided with a third extension part and a fourth extension part, the third extension part is arranged on one side of the second end cover facing the rotor assembly and extends along the axial direction of the rotating shaft in a direction approaching the rotor assembly, and the fourth extension part is arranged on the inner side surface of the second end cover and extends along the radial direction of the rotating shaft in a direction approaching the rotating shaft; the third extension part, the fourth extension part, the rotating shaft and the rotor assembly are surrounded to form the second chamber.
A permanent magnet direct drive traction motor comprising a motor cooling system as claimed in any one of the preceding claims.
When the motor cooling system provided by the invention is used, air is blown in from the air inlet of the first end cover, enters the cooling air passage through the first cavity, flows through the cooling air passage and enters the second cavity, and is blown out from the air outlet of the second end cover, and in the process that the air flows through the cooling air passage, the air exchanges heat with the rotor assembly, absorbs heat of the rotor assembly, and realizes cooling of the rotor assembly.
Because the invention adopts an air cooling mode, the requirement on the sealing structure of the bearing can be reduced, and the invention is applicable to the cooling of the rotor component of the low-speed high-torque permanent magnet direct-drive traction motor.
In addition, the invention also provides a permanent magnet direct-drive traction motor comprising the motor cooling system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic cross-sectional view of a permanent magnet direct drive traction motor according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a permanent magnet direct drive traction motor according to another aspect of the present invention;
FIG. 3 is a schematic view of the arrangement position of the first channel;
fig. 4 is a schematic view of the arrangement position of the second channel.
In fig. 1-4:
1 is a stator assembly, 11 is a stator core, 12 is a stator winding, 2 is a rotor assembly, 21 is a rotating shaft, 22 is a rotor core, 23 is magnetic steel, 3 is a shell, 31 is a flange, 4 water channels, 41 is an outer water jacket, 42 is an inner water jacket, 43 is a water inlet, 44 is a water outlet, 51 is a first end cover, 52 is a second end cover, 61 is an air inlet channel, 611 is a first channel, 612 is an air inlet, 62 is an air outlet channel, 621 is a second channel, 63 is a cooling air channel, 71 is a first chamber, 72 is a second chamber, 81 is a transmission end bearing, and 82 is a non-transmission end bearing.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The core of the invention is to provide a motor cooling system which can cool down a rotor assembly through air cooling, reduces the requirement on a sealing structure of a bearing, and is applicable to a low-speed and high-torque permanent magnet direct-drive traction motor.
Another core of the present invention is to provide a permanent magnet direct drive traction motor including the motor cooling system described above.
Please refer to fig. 1 to 4.
The embodiment discloses a motor cooling system, which comprises a rotating shaft 21, a rotor assembly 2, a stator assembly 1, a shell 3 and an end cover, wherein the rotor assembly 2 is sleeved on the rotating shaft 21 and is positioned at the inner side of the stator assembly 1, the stator assembly 1 is arranged at the inner side of the shell 3, and the end cover comprises a first end cover 51 and a second end cover 52 which are respectively arranged at two axial ends of the rotor assembly 2; a first chamber 71 is formed between the first end cover 51 and the rotor assembly 2, a second chamber 72 is formed between the second end cover 52 and the rotor assembly 2, the rotor assembly 2 is provided with a cooling air path 63, one end of the cooling air path 63 is communicated with the first chamber 71, and the other end is communicated with the second chamber 72; the first end cap 51 is provided with an air inlet 61 for communication with the first chamber 71, and the second end cap 52 is provided with an air outlet 62 for communication with the second chamber 72; the air flows through the air inlet passage 61, the first chamber 71, the cooling air passage 63 and the second chamber 72 in sequence, and flows out of the air outlet passage 62, thereby realizing air cooling and heat dissipation of the rotor assembly 2.
It should be noted that, in this embodiment, the first chamber 71 and the second chamber 72 are not completely closed chambers, but are relatively closed chambers, so that the sealing requirements between the first end cover 51 and the rotor assembly 2 and between the second end cover 52 and the rotor assembly 2 are not high, and in the actual use process, after the gas enters the air inlet channel 61, the gas enters the first chamber 71 under the action of the air pressure, and the air pressure in the first chamber 71 is continuously increased and decreased, so that at least part of the gas enters the cooling air channel 63 communicated with the first chamber 71; the air flows out of the cooling air passage 63 to the second chamber 72 by the air pressure, and the air pressure in the second chamber 72 is increased continuously, so that the air flows out of the air outlet passage 62.
When the motor cooling system provided in this embodiment is used, air is blown in through the air inlet 61 of the first end cover 51, enters the cooling air passage 63 through the first chamber 71, flows through the cooling air passage 63, enters the second chamber 72, and is blown out through the air outlet 62 of the second end cover 52, and in the process that the air flows through the cooling air passage 63, the air exchanges heat with the rotor assembly 2, absorbs heat of the rotor assembly 2, and achieves cooling of the rotor assembly 2.
Because the air cooling mode is adopted in the embodiment, the requirement on the sealing structure of the bearing can be reduced, and the sealing performance of the bearing of the low-speed high-torque permanent magnet direct-drive traction motor is not high, so that the motor cooling system in the embodiment can be suitable for cooling the rotor assembly 2 of the low-speed high-torque permanent magnet direct-drive traction motor.
In a specific embodiment, the rotor assembly 2 includes a rotor core 22 and a magnetic steel 23 embedded in the rotor core 22 and extending in an axial direction of the rotor core 22, and the cooling air path 63 is provided in the rotor core 22.
The cooling air duct 63 may be an air duct having no bend, or may be an air duct having a bend but the bend does not affect the flow of the gas, and is specifically determined according to the actual situation.
Specifically, the cooling air duct 63 may include a plurality of columnar through holes that are uniformly distributed along the circumferential direction of the rotor core 22, and that penetrate the rotor core 22 in the circumferential direction of the rotor core 22.
Further, as shown in fig. 2, the cooling air passages 63 may be provided as cylindrical through holes extending in the axial direction of the rotating shaft 21, and the plurality of cooling air passages 63 may be uniformly distributed in the circumferential direction of the rotor core 22. Of course, the cooling air path 63 may be configured as an air path with other shapes, which is specifically determined according to the actual situation, and will not be described herein.
The plurality of columnar through holes in this embodiment are uniformly distributed along the circumferential direction of the rotor core 22, so that each portion of the rotor assembly 2 can be uniformly cooled.
In one embodiment, as shown in fig. 3, the air inlet 61 is disposed at a position above the first end cover 51, and the air inlet 61 is coupled to the air inlet 612, as shown in fig. 4, and the air outlet 62 is disposed at a position below the second end cover 52.
The upper position of the first end cap 51 in this embodiment means a position above the middle position of the first end cap 51, and the lower position of the second end cap 52 means a position below the middle position of the second end cap 52.
Specifically, the air inlet 61 may include a plurality of first passages 611 communicating with the first chamber 71, and the air outlet 62 may include a plurality of second passages 621 communicating with the second chamber 72.
Specifically, the first channel 611 and the second channel 621 may be configured as fan-shaped channels, or may be rectangular, square, columnar, or other channels, which is specifically determined according to practical situations.
Further, adjacent first channels 611 may be disposed at intervals; the spacing angles between the adjacent first channels 611 may be the same, and of course, the spacing angles between the adjacent first channels 611 may also be different, which is determined according to actual situations; the adjacent second channels 621 are arranged at intervals; the spacing angle between the adjacent second passages 621 may be further the same, but of course, the spacing angle between the adjacent second passages 621 may also be different, specifically determined according to the actual situation.
In this embodiment, the angle of the air inlet path 61 in the circumferential direction of the first end cover 51 is less than or equal to 180 degrees, which may be specifically determined according to practical situations. The angle occupied by the air outlet passage 62 in the circumferential direction of the second end cover 52 is less than or equal to 180 degrees, which can be specifically determined according to practical situations.
In the embodiment, the air inlet channel 61 is arranged at the upper part of the first end cover 51 and is connected with a cooling system of a locomotive or a vehicle, so that air can conveniently enter the air inlet channel 61; the air outlet passage 62 is disposed at a lower position of the second end cover 52, so that impurities in the air can be prevented from entering the motor.
In addition, filter screens can be arranged at the air inlet 612 of the air inlet channel 61 and the air outlet of the air outlet channel 62 to prevent impurities from entering the motor.
In one embodiment, as shown in fig. 1, the housing 3 is provided with a waterway 4, a water inlet 43 communicating with the waterway 4, and a water outlet 44 communicating with the waterway 4; the water channel 4 extends in the axial direction of the housing 3.
Specifically, the stator assembly 1 is inserted inside the casing 3, the stator assembly 1 includes a stator core 11 and a stator winding 12, the casing 3 includes an outer water jacket 41, an inner water jacket 42, and two flanges 31, as shown in fig. 2, the outer water jacket 41 is sleeved outside the inner water jacket 42, and a chamber between the outer water jacket 41 and the inner water jacket 42 forms a water channel 4; the water inlet 43 and the water outlet 44 are both provided in the outer water jacket 41.
In actual arrangement, as shown in fig. 2, the inner water jacket 42 may fully wrap the stator core 11 along the circumferential direction, and the outer water jacket 41 and the inner water jacket 42 form a cavity along the circumferential direction, so as to form a water channel 4, where the water channel 4 is distributed in part of the circumferential direction, so as to avoid the installation of other parts; of course, the outer water jacket 41 and the inner water jacket 42 may form a cavity along the circumferential direction to form the water channel 4, and the water channel 4 may be distributed in the entire circumferential direction, specifically determined according to the actual situation.
In one embodiment, as shown in fig. 1, one end of the rotating shaft 21 is provided with a transmission end bearing 81, the other end is provided with a non-transmission end bearing 82, and the transmission end bearing 81 is located outside the second end cover 52, and the non-transmission end bearing 82 is located outside the first end cover 51; the first end cover 51 is provided with a first extending portion and a second extending portion, the first extending portion is provided in the first end cover 51 toward one side of the rotor assembly 2 and extends in a direction approaching the rotor assembly 2 along an axial direction of the rotating shaft 21 until the first extending portion contacts the rotor assembly 2 or until a narrow gap is provided between the first extending portion and the rotor assembly 2, which does not affect rotation of the rotor assembly 2; the second extension part is arranged on the inner side surface of the first end cover 51 and extends along the radial direction of the rotating shaft 21 towards the direction close to the rotating shaft 21 until the second extension part contacts the rotating shaft 21 or until a narrow gap which does not affect the rotation of the rotating shaft 21 is formed between the second extension part and the rotating shaft 21; the first extension part, the second extension part, the rotating shaft 21 and the rotor assembly 2 are surrounded to form a first chamber 71;
the second end cover 52 is provided with a third extension part and a fourth extension part, the third extension part is arranged in the second end cover 52 towards one side of the rotor assembly 2 and extends along the axial direction of the rotating shaft 21 towards the direction close to the rotor assembly 2 until the third extension part contacts the rotor assembly 2 or until a narrow gap which does not affect the rotation of the rotor assembly 2 is formed between the third extension part and the rotor assembly 2; the fourth extension part is arranged on the inner side surface of the second end cover 52 and extends along the radial direction of the rotating shaft 21 towards the direction close to the rotating shaft 21 until the fourth extension part contacts the rotating shaft 21 or until a narrow gap which does not affect the rotation of the rotating shaft 21 is formed between the fourth extension part and the rotating shaft 21; the third extension, the fourth extension, the shaft 21, and the rotor assembly 2 enclose a second chamber 72.
In this embodiment, the sealing performance of the first chamber 71 is improved by providing the first extending portion and the second extending portion, and the sealing performance of the second chamber 72 is improved by providing the third extending portion and the fourth extending portion, but the first chamber 71 and the second chamber 72 cannot be tightly sealed, so that after the sealing effect is improved, as much gas as possible can enter the cooling air path 63, and the gas flowing out of the cooling air path 63 can be discharged more intensively.
In addition to the motor cooling system, the present invention further provides a permanent magnet direct-drive traction motor including the motor cooling system disclosed in the foregoing embodiment, and the structure of each other portion of the permanent magnet direct-drive traction motor is referred to the prior art, which is not described herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. Any combination of all the embodiments provided in the present invention is within the protection scope of the present invention, and will not be described herein.
The motor cooling system and the permanent magnet direct-drive traction motor provided by the invention are described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (10)
1. The motor cooling system is characterized by comprising a rotating shaft (21), a rotor assembly (2), a stator assembly (1), a shell (3) and an end cover, wherein the rotor assembly (2) is sleeved on the rotating shaft (21) and is positioned on the inner side of the stator assembly (1), the stator assembly (1) is mounted on the inner side of the shell (3), and the end cover comprises a first end cover (51) and a second end cover (52) which are respectively arranged at two axial ends of the rotor assembly (2);
a first chamber (71) is formed between the first end cover (51) and the rotor assembly (2), a second chamber (72) is formed between the second end cover (52) and the rotor assembly (2), the rotor assembly (2) is provided with a cooling air path (63), one end of the cooling air path (63) is communicated with the first chamber (71), and the other end of the cooling air path is communicated with the second chamber (72); the first end cover (51) is provided with an air inlet channel (61) used for being communicated with the first chamber (71), and the second end cover (52) is provided with an air outlet channel (62) used for being communicated with the second chamber (72);
the air flows through the air inlet channel (61), the first chamber (71), the cooling air channel (63) and the second chamber (72) in sequence, and flows out from the air outlet channel (62), so that air cooling and heat dissipation of the rotor assembly (2) are realized.
2. The motor cooling system according to claim 1, wherein the rotor assembly (2) includes a rotor core (22) and a magnetic steel (23) embedded in the rotor core (22) and extending in an axial direction of the rotor core (22), and the cooling air passage (63) is provided to the rotor core (22).
3. The motor cooling system according to claim 2, characterized in that the cooling air passage (63) includes a plurality of columnar through holes that are uniformly distributed along a circumferential direction of the rotor core (22), and that penetrate the rotor core (22) in the circumferential direction of the rotor core (22).
4. The motor cooling system according to claim 1, wherein the air intake passage (61) is provided at a position slightly above the first end cap (51), and the air outlet passage (62) is provided at a position slightly below the second end cap (52).
5. The electric machine cooling system according to claim 2, characterized in that the air intake (61) comprises a plurality of first channels (611) communicating with the first chamber (71);
the air outlet passage (62) includes a plurality of second passages (621) communicating with the second chamber (72).
6. A motor cooling system according to claim 3, characterized in that a space between adjacent first channels (611) is provided;
and a space between adjacent second channels (621) is arranged.
7. -electric motor cooling system according to any one of claims 1 to 6, characterized in that the housing (3) is provided with a water channel (4), a water inlet (43) communicating with the water channel (4) and a water outlet (44) communicating with the water channel (4); the water channel (4) extends along the axial direction of the shell (3).
8. The electric motor cooling system according to claim 7, characterized in that the housing (3) comprises an outer water jacket (41) and an inner water jacket (42), the outer water jacket (41) being arranged to be nested outside the inner water jacket (42), a chamber between the outer water jacket (41) and the inner water jacket (42) forming the water channel (4); the water inlet (43) and the water outlet (44) are both arranged on the outer water jacket (41).
9. The motor cooling system according to any one of claims 1 to 6, characterized in that the first end cover (51) is provided with a first extension portion which is provided in the first end cover (51) toward one side of the rotor assembly (2) and extends in a direction of the shaft (21) toward the rotor assembly (2), and a second extension portion which is provided in an inner side surface of the first end cover (51) and extends in a direction of the shaft (21) toward the shaft (21) in a radial direction of the shaft (21); the first extension part, the second extension part, the rotating shaft (21) and the rotor assembly (2) are surrounded to form the first chamber (71);
the second end cover (52) is provided with a third extension part and a fourth extension part, the third extension part is arranged on one side of the second end cover (52) facing the rotor assembly (2) and extends along the axial direction of the rotating shaft (21) towards the direction close to the rotor assembly (2), and the fourth extension part is arranged on the inner side surface of the second end cover (52) and extends along the radial direction of the rotating shaft (21) towards the direction close to the rotating shaft (21); the third extension part, the fourth extension part, the rotating shaft (21) and the rotor assembly (2) are surrounded to form the second chamber (72).
10. A permanent magnet direct drive traction motor comprising the motor cooling system of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311653397.XA CN117458786A (en) | 2023-12-04 | 2023-12-04 | Motor cooling system and permanent magnet direct-drive traction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311653397.XA CN117458786A (en) | 2023-12-04 | 2023-12-04 | Motor cooling system and permanent magnet direct-drive traction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117458786A true CN117458786A (en) | 2024-01-26 |
Family
ID=89585608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311653397.XA Pending CN117458786A (en) | 2023-12-04 | 2023-12-04 | Motor cooling system and permanent magnet direct-drive traction motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117458786A (en) |
-
2023
- 2023-12-04 CN CN202311653397.XA patent/CN117458786A/en active Pending
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