CN114448154B - Liquid cooling heat dissipation external rotor electric machine and aircraft thereof - Google Patents
Liquid cooling heat dissipation external rotor electric machine and aircraft thereof Download PDFInfo
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- CN114448154B CN114448154B CN202210042293.4A CN202210042293A CN114448154B CN 114448154 B CN114448154 B CN 114448154B CN 202210042293 A CN202210042293 A CN 202210042293A CN 114448154 B CN114448154 B CN 114448154B
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- liquid
- stator
- heat dissipation
- iron core
- channel
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- 239000007788 liquid Substances 0.000 title claims abstract description 69
- 238000001816 cooling Methods 0.000 title claims abstract description 48
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 42
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000000110 cooling liquid Substances 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims description 29
- 238000004804 winding Methods 0.000 claims description 8
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000003754 machining Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- H02K5/10—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
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a liquid cooling heat dissipation outer rotor motor and an aircraft thereof, wherein the liquid cooling heat dissipation outer rotor motor comprises a stator, an iron core and an outer rotor, wherein the outer rotor is sleeved on the iron core; the inner surface of the iron core and the outer surface of the stator are sleeved and assembled; a plurality of paths of staggered rotary flow channels for cooling liquid to flow are arranged at the position, matched with the stator, on the outer circumferential surface of the stator; the outer surface of the stator is provided with an axial groove, and the inner surface of the iron core is provided with a convex edge matched with the groove. According to the invention, the multi-path staggered rotary flow channel is arranged on the outer circumference of the stator, and after the iron core and the stator are assembled, a cooling liquid channel is formed between the iron core and the stator, so that the direct contact cooling of the cooling liquid on the iron core can be realized, the heat dissipation contact area is large, and the cooling efficiency is high.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a liquid cooling heat dissipation outer rotor motor and an aircraft thereof.
Background
With the continuous promotion of the national industry upgrading, the development of the new energy industry is faster and faster. The power density and loss density of the motor are increasing, and the problem of heat generation of the motor is further highlighted. In an electric aircraft, a motor is one of the most critical components of a power system, and the heat dissipation performance of the motor directly influences the safety and stability of the aircraft.
The cooling mode of the existing outer rotor motor is mainly wind cooling and liquid cooling. The air-cooled heat dissipation efficiency is limited, and for a motor with a serious heating problem, the heat of the motor cannot be effectively dissipated by air-cooled heat dissipation, and forced liquid cooling is needed.
At present, the mode of carrying out liquid cooling to external rotor motor sets up the cooling cavity in motor stator, and the principle of this kind of cooling mode is that the heat on the iron core passes through heat-conduction and gives the stator with heat transfer, then the coolant liquid in the stator cooling cavity cools off the stator, and then takes away the heat that the motor produced, and this belongs to indirect cooling iron core. The arrangement of the cooling structure can not realize direct contact cooling of the stator core, and the problems of long processing period, high manufacturing cost, complex assembly process and the like exist in the arrangement of the cavity in the motor stator.
Therefore, a cooling liquid is needed to perform a cooling heat dissipation technology for the direct contact of the motor core, so that the heat dissipation efficiency is remarkably improved, the service performance and the service life of the motor are improved, and the safety of the electric aircraft is effectively guaranteed.
Disclosure of Invention
The invention aims to solve the problems that: the multi-path misdirection rotating flow channels are arranged at the positions, matched with the iron core, on the outer circumferential surface of the stator, and after the iron core and the stator are assembled, a cooling liquid channel is formed between the iron core and the stator, so that the direct contact cooling of the cooling liquid on the iron core can be realized, the heat dissipation contact area is large, and the cooling efficiency is high.
The technical scheme provided by the invention for solving the problems is as follows: a liquid cooling heat dissipation outer rotor motor comprises a stator, an iron core and an outer rotor, wherein the outer rotor is sleeved on the iron core; the inner surface of the iron core is sleeved and assembled with the outer surface of the stator; a plurality of staggered rotary flow channels for cooling liquid to circulate are arranged at the position, matched with the iron core, on the outer circumferential surface of the stator, and the cooling liquid directly contacts and cools the iron core in the plurality of staggered rotary flow channels; the outer surface of the stator is provided with an axial groove, and the inner surface of the iron core is provided with a convex edge matched with the groove.
Preferably, the stator further comprises an upper sealing cover and a lower sealing cover, the upper sealing cover is matched with the upper end of the iron core and the upper end face of the stator to realize sealing, and the lower sealing cover is sleeved on the stator and matched with the lower end face of the iron core to realize sealing.
Preferably, the upper sealing cover and the lower sealing cover are both provided with sealing grooves for accommodating sealing rings.
Preferably, the upper cover and the lower cover are provided with winding contour grooves for accommodating windings.
Preferably, a first heat dissipation fin is arranged on the upper end face of the upper sealing cover.
Preferably, be equipped with inlet channel, liquid outlet channel on the stator, go up annular minute liquid channel and annular minute liquid channel down, it sets up to go up annular minute liquid channel stator upper portion and with the rotatory runner's of multichannel wrong direction initiating terminal intercommunication, go up annular minute liquid channel with inlet channel intercommunication, annular minute liquid channel sets up down the stator lower part and with the rotatory runner's of multichannel wrong direction terminal intercommunication, annular minute liquid channel down with liquid outlet channel intercommunication.
Preferably, the liquid inlet channel and the liquid outlet channel are both two.
Preferably, the cross section of the multi-path staggered rotary flow channel is semicircular or semi-elliptical.
Preferably, the number of the grooves and the number of the ribs are four, every two grooves are spaced at 90 degrees, every two ribs are spaced at 90 degrees, and the ribs are M-shaped.
The invention also discloses an aircraft which comprises the liquid cooling heat dissipation outer rotor motor.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, the multi-path misdirection rotating flow channels are arranged at the positions on the outer circumferential surface of the stator, which are matched with the iron core, and after the iron core and the stator are assembled, a cooling liquid channel is formed between the iron core and the stator, so that the direct contact cooling of the cooling liquid on the iron core can be realized, the heat dissipation contact area is large, and the cooling efficiency is high;
2. the heat dissipation mode of the invention obviously improves the thermal contact resistance, enables the temperature to be uniformly distributed, has smaller gradient difference of circumferential and axial temperature distribution, and eliminates local high-heat dead zones;
3. the four convex edges on the inner wall of the iron core can play a role in fixing, and the cooling liquid can generate turbulence to enhance the heat exchange effect;
4. compared with the conventional air-cooling heat dissipation scheme and the indirect contact liquid-cooling heat dissipation scheme, the direct cooling iron core heat dissipation structure has the advantages that the heat dissipation capacity is greatly improved, the electromagnetic performance and the mechanical performance of the motor can be kept in a superior state, the service life of the motor is prolonged, and the safety of an aircraft is effectively guaranteed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is an exploded schematic view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view taken along line D-D of FIG. 2;
FIG. 4 is a schematic view of the upper closure;
fig. 5 is a thermal simulated cloud of the core.
The attached drawings are marked as follows: 1. the rotor comprises an outer rotor, 2, an upper sealing cover, 3, first radiating fins, 4, an iron core, 5, a lower sealing cover, 6, a stator, 7, a groove, 8, a lower annular liquid separating channel, 9, an upper annular liquid separating channel, 10, a multi-path staggered rotary flow channel, 11, a winding profiling groove, 12, a liquid outlet channel, 13, a liquid inlet channel, 14, a convex edge, 15 and a second radiating fin.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a number" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
The specific embodiment of the invention is shown in fig. 1-5, and the liquid cooling heat dissipation outer rotor motor comprises a stator 6, an iron core 4 and an outer rotor 1, wherein the outer rotor 1 is sleeved on the iron core 4; the inner surface of the iron core 4 is sleeved and assembled with the outer surface of the stator 6; a plurality of staggered rotary flow channels 10 for cooling liquid to flow are arranged on the outer circumferential surface of the stator 6 and matched with the iron core 4, the cooling liquid realizes direct contact cooling of the iron core in the plurality of staggered rotary flow channels, and the plurality of staggered rotary flow channels simultaneously extend in the circumferential direction and the axial direction of the stator; the outer surface of the stator 6 is provided with an axial groove 7, and the inner surface of the iron core 4 is provided with a convex edge 14 matched with the groove 7.
In the invention, the cooling liquid is in direct contact with the iron core, so that the heat of the iron core can be effectively taken away. Compared with a traditional heat dissipation mode (namely, the heat of the iron core is transferred to the stator through heat conduction, and the cooling liquid dissipates the heat of the stator so as to take away the heat) the cooling effect is better.
Wherein, the bead of iron core internal surface and the recess of stator surface mutually support, have two aspects and act on: the first is spacing to the circumference of stator and iron core, plays the fixed action, and the second is to form the vortex in multichannel wrong direction runner, destroys the flow boundary layer, makes the flow be the turbulent state, reinforces the heat dissipation.
It should be noted that the multi-way misdirected rotating flow channel of the present invention has the following advantages:
1. the flow of the cooling liquid flowing through the heat source in unit time is increased, the heat transfer is enhanced, and the heat dissipation effect is good;
2. compared with a single spiral flow passage, the structure increases the circumferential anti-torsion section coefficient, and has better anti-torsion rigidity;
3. the tool clamp during machining is simple, and machining difficulty is reduced.
In this embodiment, still include closing cap 2 and lower closing cap 5, it realizes sealedly to go up closing cap 2 and the cooperation of iron core 4 upper end and stator 6 up end, 5 covers of lower closing cap overlap establish on stator 6 and with the cooperation of iron core 4 lower terminal surface realize sealedly.
Furthermore, the upper sealing cover 2 and the lower sealing cover 5 are both provided with sealing grooves (not marked in the figure) for accommodating sealing rings.
Further, the upper cover 2 and the lower cover 5 are both provided with winding contour grooves 11 for accommodating windings.
Further, a first heat dissipation fin 3 is arranged on the upper end face of the upper sealing cover 2. The heat generated by the winding can be taken away through the radiating fins, and the cooling effect on the coil is enhanced.
In this embodiment, be equipped with inlet channel 13, liquid outlet channel 12 on the stator 6, go up annular minute liquid channel 9 and annular minute liquid channel 8 down, it sets up to go up annular minute liquid channel 9 stator 6 upper portion and with the rotatory runner 10's of multichannel wrong direction initiating terminal intercommunication, go up annular minute liquid channel 9 with inlet channel 13 intercommunication, annular minute liquid channel 8 sets up down stator 6 lower part and with the rotatory runner 10's of multichannel wrong direction terminal intercommunication, annular minute liquid channel 8 down with liquid outlet channel 12 intercommunication.
Further, the liquid inlet channel 13 and the liquid outlet channel 12 are two. It should be noted that, in the present invention, the number of the liquid inlet channel 13 and the liquid outlet channel 12 may be set according to the actual situation.
The cooling liquid enters the upper annular liquid distribution channel through the liquid inlet channel, the multi-path misdirected rotary flow channel is communicated with the upper annular liquid distribution channel, and the cooling liquid is distributed at the upper annular liquid distribution channel and finally enters the multi-path misdirected rotary flow channel; the tail end of the multi-path staggered rotary flow passage is communicated with the lower annular liquid distribution channel, and cooling liquid is collected at the lower annular liquid distribution channel, enters the liquid outlet channel and finally flows out through the liquid outlet channel.
Further, the cross section of the multi-path staggered rotary flow channel 10 is semicircular or semi-elliptical.
In the present embodiment, the grooves 7 and the ribs 14 are four, every two grooves 7 are spaced apart by 90 °, every two ribs 14 are spaced apart by 90 °, and the ribs 14 are M-shaped.
In the invention, a water channel can be arranged on the upper sealing cover, so that the cooling liquid is introduced into the water channel of the upper sealing cover, and the cooling effect on the coil is enhanced; meanwhile, a water channel is also arranged on the lower sealing cover, so that cooling liquid can be led into the water channel of the lower sealing cover, and the cooling effect on the coil is further enhanced.
Wherein, still integrate integrative radiating fin two 15 in stator main part inside, as supplementary reinforcing heat-sinking capability.
As can be seen from the thermal simulation cloud chart (figure 5), the heat dissipation mode of the invention obviously improves the thermal contact resistance, enables the temperature to be uniformly distributed, has smaller gradient difference of circumferential and axial temperature distribution, eliminates local high-heat dead zones, and greatly improves the heat dissipation capability compared with the conventional passive heat dissipation scheme and the indirect contact liquid cooling heat dissipation scheme.
The cooling liquid of the present invention may be pure water, or may be cooling liquid of other industrial common brands.
The invention also discloses an aircraft which comprises the liquid cooling heat dissipation outer rotor motor.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the invention as defined by the appended claims are intended to be embraced therein.
Claims (10)
1. A liquid cooling heat dissipation outer rotor motor comprises a stator (6), an iron core (4) and an outer rotor (1), wherein the outer rotor (1) is sleeved on the iron core (4); the method is characterized in that: the inner surface of the iron core (4) is sleeved and assembled with the outer surface of the stator (6); a multi-path misdirection rotating flow channel (10) for cooling liquid to flow is arranged at the position, matched with the iron core (4), on the outer circumferential surface of the stator (6), and the cooling liquid realizes direct contact cooling on the iron core in the multi-path misdirection rotating flow channel (10); the outer surface of the stator (6) is provided with an axial groove (7), and the inner surface of the iron core (4) is provided with a convex rib (14) matched with the groove (7).
2. The liquid cooling heat dissipation external rotor motor of claim 1, wherein: still include closing cap (2) and lower closing cap (5), it realizes sealedly to go up closing cap (2) and iron core (4) upper end and stator (6) up end cooperation, closing cap (5) cover is established down on stator (6) and realize sealedly with iron core (4) lower terminal surface cooperation.
3. The liquid cooling heat dissipation external rotor motor of claim 2, wherein: and the upper sealing cover (2) and the lower sealing cover (5) are both provided with sealing grooves for accommodating sealing rings.
4. The liquid cooling heat dissipation external rotor motor of claim 2, wherein: and winding profiling grooves (11) for containing windings are formed in the upper sealing cover (2) and the lower sealing cover (5).
5. The liquid cooling heat dissipation external rotor motor according to any one of claims 2 to 4, wherein: and a first radiating fin (3) is arranged on the upper end face of the upper sealing cover (2).
6. The liquid cooling heat dissipation external rotor motor of claim 1, wherein: be equipped with inlet channel (13), liquid outlet channel (12) on stator (6), go up annular minute liquid channel (9) and annular minute liquid channel (8) down, it sets up to go up annular minute liquid channel (9) stator (6) upper portion and with the initiating terminal intercommunication of rotatory runner (10) of multichannel wrong direction, go up annular minute liquid channel (9) with inlet channel (13) intercommunication, annular minute liquid channel (8) set up down stator (6) lower part and with the terminal intercommunication of rotatory runner (10) of multichannel wrong direction, annular minute liquid channel (8) with liquid outlet channel (12) intercommunication down.
7. The liquid cooling heat dissipation external rotor electric machine of claim 6, characterized in that: the liquid inlet channel (13) and the liquid outlet channel (12) are both two.
8. The liquid cooling heat dissipation external rotor motor of claim 1, wherein: the section of the multi-path staggered rotary flow channel (10) is semicircular or semielliptical.
9. The liquid cooling heat dissipation external rotor motor of claim 1, wherein: the novel LED lamp is characterized in that the number of the grooves (7) and the number of the ribs (14) are four, every two grooves (7) are spaced at 90 degrees, every two ribs (14) are spaced at 90 degrees, and the ribs (14) are M-shaped.
10. An aircraft, characterized in that: the liquid cooling heat dissipation external rotor motor comprises the liquid cooling heat dissipation external rotor motor as claimed in any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210042293.4A CN114448154B (en) | 2022-01-14 | 2022-01-14 | Liquid cooling heat dissipation external rotor electric machine and aircraft thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210042293.4A CN114448154B (en) | 2022-01-14 | 2022-01-14 | Liquid cooling heat dissipation external rotor electric machine and aircraft thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114448154A CN114448154A (en) | 2022-05-06 |
| CN114448154B true CN114448154B (en) | 2022-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210042293.4A Active CN114448154B (en) | 2022-01-14 | 2022-01-14 | Liquid cooling heat dissipation external rotor electric machine and aircraft thereof |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3788842B2 (en) * | 1997-05-27 | 2006-06-21 | 株式会社日立製作所 | Wheel-integrated electric motor |
| JP4648470B2 (en) * | 2009-07-03 | 2011-03-09 | ファナック株式会社 | Electric motor cooling device |
| CN107394913A (en) * | 2017-09-05 | 2017-11-24 | 江苏航天动力机电有限公司 | New-energy automobile wheel hub motor stator core construction and its processing method |
| CN110556950B (en) * | 2019-09-29 | 2020-06-09 | 哈尔滨工业大学 | Internal rotor cooling type pulse generator |
| CN112003403A (en) * | 2020-05-29 | 2020-11-27 | 卧龙电气驱动集团股份有限公司 | Hybrid cooling outer rotor permanent magnet motor |
| CN213661420U (en) * | 2020-10-10 | 2021-07-09 | 苏州英磁新能源科技有限公司 | Stator superconducting structure |
| CN113922533A (en) * | 2021-10-29 | 2022-01-11 | 南昌三瑞智能科技有限公司 | Motor stator and aircraft of single spiral water course |
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Address after: Manufacturing Center, Building D, No. 888, Tianxiang North Avenue, Nanchang High-tech Industrial Development Zone, Nanchang City, Jiangxi Province 330000 Patentee after: Nanchang Sanrui Intelligent Technology Co.,Ltd. Address before: 330000 Room 101, 33, Nanchang Jiahai Industrial Park, 2799 Tianxiang Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee before: Nanchang SanRui Intelligent Technology Co.,Ltd. |