Cooling structure of double-rotor axial flux motor and vehicle

Abstract

The utility model provides a cooling structure of a birotor axial flux motor and a vehicle, belonging to the technical field of vehicles, comprising a rotating shaft, two groups of rotor assemblies and a stator assembly, each rotor assembly comprises a rotor disc, a magnetic steel pressing plate and magnetic steel, the magnetic steel is pressed between the rotor disc and the magnetic steel pressing plate through a first fastening assembly, the rotor disc is sequentially provided with a first lower runner, a magnetic steel mounting surface and a first upper runner from the center of the rotor disc to the outside in the radial direction, and a magnetic steel runner is formed between the magnetic steel and the magnetic steel mounting surface of the rotor disc; the first lower runner is communicated with a cooling runner of the rotating shaft, and the first lower runner is communicated with the first upper runner through a magnetic steel runner; the stator assembly is arranged between the two groups of rotor assemblies. According to the utility model, the rotor disc is provided with the magnetic steel flow channels, so that cooling oil is directly contacted with the magnetic steel, heat of the magnetic steel can be directly taken away, the phenomenon of magnetic steel demagnetization caused by overlarge heating amount of the magnetic steel is avoided, and the working performance of the motor is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicles, and in particular relates to a cooling structure of a dual-rotor axial flux motor and a vehicle equipped with the cooling structure of the dual-rotor axial flux motor. Background Art

[0002] With the global oil resource crisis and environmental pollution becoming increasingly prominent, new energy vehicles are gradually being widely used because their energy utilization efficiency is much higher than that of ordinary gasoline vehicles. As the main component of new energy vehicles, the types of drive motors available are gradually increasing, including axial flux motors and radial flux motors. Under the same torque requirement, axial flux motors are widely used because the axial size of axial flux motors is much smaller than that of radial flux motors. Due to its special structure, the internal stator windings of axial flux motors are in close contact, heat accumulates, and the stator windings only rely on water cooling for indirect heat dissipation. The heat dissipation conditions are poor. The self-heating of the rotor and the heat radiation of the stator cause the temperature of the rotor magnets to rise, which may cause the risk of demagnetization and directly affect the performance of the motor.

[0003] Traditional axial flux motors generally dissipate heat through heat sinks on the casing or the end covers on both sides or water cooling. However, relying solely on this form of heat dissipation, the huge heat generated by the armature winding and the rotor cannot be removed in time, resulting in poor cooling effect. It is easy to cause the temperature of the magnetic steel to rise and create the risk of demagnetization, which directly affects the performance of the motor. Utility Model Content

[0004] The embodiment of the utility model provides a cooling structure of a dual-rotor axial flux motor, aiming to solve the problem that the heat generated by the rotor cannot be removed in time, the cooling effect is poor, and the high temperature of the magnetic steel causes the risk of demagnetization, thereby affecting the performance of the motor.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a cooling structure of a dual-rotor axial flux motor, including: a rotating shaft, two groups of rotor assemblies and a stator assembly, the rotating shaft is provided with an oil storage cavity and a cooling flow channel connected to the oil storage cavity; the two groups of rotor assemblies are installed at both ends of the rotating shaft, including a rotor disk, a magnetic steel pressure plate and a magnetic steel, the magnetic steel is pressed between the rotor disk and the magnetic steel pressure plate by a first fastening assembly, and a first lower flow channel, a magnetic steel mounting surface and a first upper flow channel are sequentially arranged on the rotor disk radially from its center to the outside, the magnetic steel is mounted on the magnetic steel mounting surface, and a magnetic steel flow channel is formed between the magnetic steel and the magnetic steel mounting surface of the rotor disk; the first lower flow channel is connected to the cooling flow channel, and the first lower flow channel is connected to the first upper flow channel through the magnetic steel flow channel, thereby constituting direct cooling of the magnetic steel; the stator assembly is arranged between the two groups of the rotor assemblies.

[0006] In combination with the first aspect, in an achievable manner, the inner ring of the magnetic steel pressure plate is provided with a second lower flow channel, and the outer ring is provided with a second upper flow channel; the first lower flow channel is connected to the magnetic steel flow channel through the second lower flow channel, and the second upper flow channel is connected to the first upper flow channel; the magnetic steel pressure plate is tightly attached to the end face of the stator assembly, and the opening of the second upper flow channel faces the end face of the stator assembly, thereby constituting direct cooling of the stator assembly.

[0007] In combination with the first aspect, in an achievable manner, the first lower flow channel includes a first radial flow channel and a first axial flow channel, the first radial flow channel is connected to the cooling flow channel, and the first axial flow channel is connected to the first radial flow channel; the second lower flow channel includes a fourth radial flow channel and a first circumferential flow channel, the first circumferential flow channel is arranged in a closed loop on the inner ring of the magnetic steel pressure plate, the fourth radial flow channel is connected to the first axial flow channel and the first circumferential flow channel, and the first circumferential flow channel is connected to the magnetic steel flow channel.

[0008] In combination with the first aspect, in one achievable manner, a second radial flow channel connecting the first circumferential flow channel and the magnetic steel flow channel is further provided on the rotor disk.

[0009] In combination with the first aspect, in one feasible manner, the first upper flow channel includes a third radial flow channel connected to the magnetic steel flow channel; the second upper flow channel includes a second circumferential flow channel and a second axial flow channel arranged on the outer ring of the magnetic steel pressure plate, the third radial flow channel and the second axial flow channel are both connected to the second circumferential flow channel, and the opening of the second axial flow channel faces the end face of the stator assembly.

[0010] In combination with the first aspect, in one feasible manner, the outer ring of the magnetic steel pressure plate is evenly provided with a plurality of first mounting holes along the circumferential direction, and the second circumferential flow channel is segmentedly provided to avoid the first mounting holes.

[0011] In combination with the first aspect, in an achievable manner, the rotor disk is provided with magnetic steel mounting grooves distributed in a circular array, the groove bottoms of the magnetic steel mounting grooves constitute the magnetic steel mounting surface, and support steps for supporting the magnetic steel are respectively provided on both radial sides of the magnetic steel mounting surface, so that the magnetic steel flow channel is formed between the magnetic steel mounting surface and the magnetic steel; each of the magnetic steel flow channels is respectively provided with the second radial flow channel and the third radial flow channel.

[0012] In combination with the first aspect, in one achievable manner, support bosses are respectively provided at both radial ends of the magnetic steel, and the inner ring and the outer ring of the magnetic steel pressure plate are respectively pressed against the corresponding support bosses.

[0013] In combination with the first aspect, in an achievable manner, it also includes a rotor disk pressure plate, the first radial flow channel is arranged on the end surface of the rotor disk facing away from the magnetic steel pressure plate, and the rotor disk pressure plate is fixed to the rotor disk through a second fastening assembly and seals the first radial flow channel.

[0014] The cooling structure of the dual-rotor axial flux motor provided by the utility model has the beneficial effect compared with the prior art: with respect to the existing axial flux motor water-cooling structure, the rotor is cooled by rotor oil cooling, the cooling oil enters the first lower flow channel of the rotor through the cooling oil channel on the rotating shaft, and then enters the magnetic steel flow channel formed by the magnetic steel and the rotor disk, so that the cooling oil directly contacts the magnetic steel heat source, thereby being able to directly take away the heat of the magnetic steel, so that the rotor is fully cooled, the cooling effect of the rotor is improved, thereby avoiding the demagnetization of the magnetic steel caused by excessive heat generation of the magnetic steel, and improving the working performance of the motor.

[0015] In a second aspect, an embodiment of the utility model further provides a vehicle, comprising the cooling structure of the dual-rotor axial flux motor.

[0016] The vehicle provided by the embodiment of the utility model adopts the motor that can directly cool the magnetic steel, thereby improving the cooling effect of the rotor and the magnetic steel in the motor, thereby improving the working performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 An exploded structural diagram of a cooling structure of a dual-rotor axial flux motor provided by an embodiment of the utility model;

[0018] Figure 2 A schematic cross-sectional view of the cooling structure of a dual-rotor axial flux motor provided by an embodiment of the utility model;

[0019] Figure 3 A schematic diagram of the three-dimensional structure of the cooling structure of the dual-rotor axial flux motor provided by an embodiment of the utility model;

[0020] Figure 4 A schematic diagram of the three-dimensional structure of the rotor disk provided in the embodiment of the utility model Figure 1 ;

[0021] Figure 5 The three-dimensional structure of the rotor disk used in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0022] Figure 6 Schematic diagram of the three-dimensional structure of the magnetic steel pressure plate provided in the embodiment of the utility model Figure 1 ;

[0023] Figure 7Schematic diagram of the three-dimensional structure of the magnetic steel pressure plate provided in the embodiment of the utility model Figure 2 ;

[0024] Figure 8 A schematic diagram of the three-dimensional structure of the magnetic steel provided in the embodiment of the utility model;

[0025] Fig. 9 A schematic diagram of the planar structure of the magnetic steel provided in an embodiment of the utility model;

[0026] Fig.10 A schematic cross-sectional view of a rotating shaft provided in an embodiment of the utility model;

[0027] Fig.11 A schematic diagram of the three-dimensional structure of a rotor disc pressure plate provided in an embodiment of the utility model;

[0028] Fig.12 A schematic diagram of the planar structure of the cooling circuit of the cooling structure provided by the embodiment of the utility model;

[0029] Fig.13 A schematic diagram of the three-dimensional structure of a cooling circuit of a cooling structure provided by an embodiment of the utility model;

[0030] Description of reference numerals:

[0031] 1. Rotating shaft; 101. Oil storage chamber; 102. Cooling channel; 2. Rotor disk; 201. First radial channel; 202. First axial channel; 203. Second radial channel; 204. Magnetic channel; 205. Third radial channel; 206. Magnetic mounting surface; 207. Fourth mounting hole; 208. Limiting sink; 209. Support step; 3. Magnetic plate; 301. Fourth radial channel; 302. First axial channel Circumferential flow channel; 303, second circumferential flow channel; 304, second axial flow channel; 305, third mounting hole; 306, magnetic steel avoidance cavity; 307, first mounting hole; 4, magnetic steel; 401, support boss; 402, second surface; 403, first surface; 5, first fastener; 6, rotor disk pressure plate; 601, second mounting hole; 602, mating surface; 7, second fastener; 8, stator assembly; 9, inside of the motor. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0034] In the claims, specification and the above drawings of the utility model, the term "upper part" refers to the side close to the center of the shaft, and the term "lower part" refers to the side away from the center of the shaft. The remaining directional words, unless otherwise clearly defined, such as the term "axial" refers to the axial direction of each component itself, "radial" refers to the diameter direction of each component itself, and "circumferential" refers to the circumferential direction of each component itself, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so they cannot be understood as limiting the specific protection scope of the present invention.

[0035] Please also read Figure 1 and Figure 2 Now, the cooling structure of the dual-rotor axial flux motor provided by the utility model is described. The cooling structure of the dual-rotor axial flux motor comprises: a rotating shaft 1, two sets of rotor assemblies and a stator assembly 8, wherein the rotating shaft 1 is provided with an oil storage cavity 101 and a cooling channel 102 connected to the oil storage cavity 101; the two sets of rotor assemblies are installed at both ends of the rotating shaft 1, and comprise a rotor disk 2, a magnetic steel pressure plate 3 and a magnetic steel 4, the magnetic steel 4 is pressed between the rotor disk 2 and the magnetic steel pressure plate 3 by a first fastening assembly, a first lower channel, a magnetic steel mounting surface 206 and a first upper channel are sequentially arranged on the rotor disk 2 radially from its center to the outside, the magnetic steel 4 is installed on the magnetic steel mounting surface 206, and a magnetic steel channel 204 is formed between the magnetic steel 4 and the magnetic steel mounting surface 206 of the rotor disk 2; the first lower channel is connected to the cooling channel 102, and the first lower channel is connected to the first upper channel through the magnetic steel channel 204, thereby directly cooling the magnetic steel 4; the stator assembly 8 is arranged between the two sets of rotor assemblies.

[0036] Compared with the prior art, the cooling structure of the dual-rotor axial flux motor provided by the utility model has the following beneficial effects: with respect to the existing axial flux motor water-cooling structure, the rotor is cooled by means of rotor oil cooling, and the cooling oil enters the first lower flow channel of the rotor through the cooling oil channel on the rotating shaft 1, and then enters the magnetic steel flow channel 204 formed by the magnetic steel 4 and the rotor disk 2, so that the cooling oil directly contacts the heat source of the magnetic steel 4, thereby being able to directly take away the heat of the magnetic steel 4, so that the rotor is fully cooled, and the cooling effect of the rotor is improved, thereby avoiding the demagnetization of the magnetic steel 4 caused by excessive heat generation of the magnetic steel 4, and improving the working performance of the motor.

[0037] The magnetic steel 4 in the motor has the functions of generating magnetic field, improving motor efficiency and enhancing motor performance. The functions of the magnetic steel 4 are explained one by one as follows: First, generating magnetic field: the magnetic steel 4 in the motor is composed of permanent magnets or electromagnetic coils. By applying current in the electromagnetic coils, a magnetic field is generated, thereby forming corresponding magnetic poles. This forms a magnetic field between the stator and the rotor of the motor, so that an attraction or repulsion force is generated between them, driving the motor to rotate; second, improving motor efficiency: the role of the magnetic steel 4 in the motor is similar to that of a permanent magnet. They can maintain magnetic force for a long time after being acted upon by current; when the motor starts, the magnetic energy in the magnetic steel 4 is converted into mechanical energy, which improves the rotation efficiency of the motor, reduces motor losses and improves motor efficiency; third, enhancing motor performance: the performance of the motor includes output power, torque, efficiency and other aspects, and the role of the magnetic steel 4 is crucial. For example, the use of high-grade magnetic steel 4 in the motor can increase the output power of the motor, making it suitable for various large-capacity applications. In addition, the different types and parameters of the magnetic steel 4 can also affect the motor's speed, starting torque and load characteristics.

[0038] It can be seen that the role of the magnetic steel 4 in the motor is irreplaceable. They can help the motor start, improve efficiency, enhance performance, and make the motor suitable for a wider range of application scenarios. However, if the motor temperature rise or local temperature rise is too high, it will have a great impact on the magnetic steel 4 inside the motor, causing the magnetic steel 4 to demagnetize, seriously affecting the performance and service life of the magnetic steel 4, thereby affecting the efficiency and working performance of the motor.

[0039] The present application is a cooling structure for a dual-rotor axial flux motor, and the rotor components at both ends of the rotating shaft 1 are completely universal and symmetrically designed. Corresponding flow channels are designed on the rotor disk 2 and the magnetic steel pressure plate 3, respectively. Through the mutual cooperation between the components, the flow channel arrangement is completed while the rotor assembly is completed.

[0040] In some embodiments, the inner ring of the magnetic steel pressure plate 3 is provided with a second lower flow channel, and the outer ring is provided with a second upper flow channel; the first lower flow channel is connected to the magnetic steel flow channel 204 through the second lower flow channel, and the second upper flow channel is connected to the first upper flow channel; the magnetic steel pressure plate 3 is close to the end face of the stator assembly 8, and the opening of the second upper flow channel faces the end face of the stator assembly 8, constituting direct cooling of the stator assembly 8. The rotor cooling path based on this embodiment is as follows: the cooling oil enters the cooling oil channel from the rotating shaft 1, flows through the first lower channel on the rotor disk 2, the second lower channel on the magnetic steel pressure plate 3, and the magnetic steel channel 204 composed of the magnetic steel 4 and the rotor disk 2, and cools the magnetic steel 4 of the rotor part; then enters the second upper channel through the first upper channel, and directly sprays the cooling oil to the stator assembly 8 through the second upper channel, thereby achieving direct cooling of the stator assembly 8. Therefore, through the channel set on the rotor, simultaneous cooling of the stator and the rotor is achieved, which greatly improves the cooling effect of the motor, thereby improving the working performance of the motor.

[0041] The oil storage cavity 101 on the rotating shaft 1 is arranged on the hollow cavity of the rotating shaft 1 , and cooling channels 102 extending along the radial direction of the rotating shaft 1 are arranged at both ends of the rotating shaft 1 , and the cooling channels 102 are communicated with the first lower channel.

[0042] In some embodiments, the first lower flow channel includes a first radial flow channel 201 and a first axial flow channel 202, the first radial flow channel 201 is connected to the cooling flow channel 102, and the first axial flow channel 202 is connected to the first radial flow channel 201; the second lower flow channel includes a fourth radial flow channel 301 and a first circumferential flow channel 302, the first circumferential flow channel 302 is arranged in a closed loop on the inner ring of the magnetic steel pressure plate 3, the fourth radial flow channel 301 is connected to the first axial flow channel 202 and the first circumferential flow channel 302, and the first circumferential flow channel 302 is connected to the magnetic steel flow channel 204.

[0043] The cooling path of the cooling structure based on this embodiment is as follows: the oil storage cavity 101 of the rotating shaft 1, the cooling channel 102 of the rotating shaft 1, the first radial channel 201 of the rotor disk 2, the first axial channel 202 of the rotor disk 2, the fourth radial channel 301 of the magnetic steel pressure plate 3, the first circumferential channel 302 of the magnetic steel pressure plate 3, the second radial channel 203 of the rotor disk 2, the magnetic steel channel 204 (for cooling the rotor magnetic steel 4), the third radial channel 205 of the rotor disk 2, the second circumferential channel 303 of the magnetic steel pressure plate 3, the second axial channel 304 of the magnetic steel pressure plate 3, the stator assembly 8 (cooling the stator winding), and the interior of the motor 9 (after cooling the stator assembly 8, the oil flows into the interior of the motor 9 for cooling oil circulation).

[0044] In this embodiment, the first circumferential flow channel 302 is a closed-loop groove machined on the end surface of the magnetic steel pressure plate 3 facing the rotor disk 2 with the center of the circle of the magnetic steel pressure plate 3 as the center. After the cooling oil enters the first circumferential flow channel 302 from the fourth radial flow channel 301, it flows in a ring shape along the first circumferential flow channel 302, so that a uniformly distributed second radial flow channel 203 can be set on the first circumferential flow channel 302, so that the second radial flow channel 203 is radially distributed and connected to the magnetic steel flow channels 204 distributed in a circular array, and the cooling oil is transported to each magnetic steel flow channel 204, so that each magnetic steel flow channel 204 is cooled separately.

[0045] In some embodiments, the rotor disk 2 is further provided with a second radial flow channel 203 connecting the first circumferential flow channel 302 and the magnetic steel flow channel 204. The present application uses radial and axial holes or grooves as flow channels, and the straight-line structure is easier to process and has a low processing cost; and the circumferential flow channel in the circumferential direction is also easy to clamp and process, and is easy to process and has a low processing cost.

[0046] In some embodiments, the first upper flow channel includes a third radial flow channel 205 connected to the magnetic steel flow channel 204; the second upper flow channel includes a second circumferential flow channel 303 and a second axial flow channel 304 arranged on the outer ring of the magnetic steel pressure plate 3, the third radial flow channel 205 and the second axial flow channel 304 are both connected to the second circumferential flow channel 303, and the opening of the second axial flow channel 304 faces the end face of the stator assembly 8. After passing through the magnetic steel flow channel 204, the cooling oil enters the second circumferential flow channel 303 through the third radial flow channel 205, and then enters the second axial flow channel 304, and the opening of the second axial flow channel 304 faces the stator assembly 8, so the cooling oil can be directly sprayed to the stator assembly 8 through this path, and the stator assembly 8 is directly cooled.

[0047] In some embodiments, the outer ring of the magnetic steel pressure plate 3 is evenly provided with a plurality of first mounting holes 307 along the circumferential direction, and the second circumferential flow channel 303 is provided in sections to avoid the first mounting holes 307. The first fastener 5 includes a first bolt and a first nut matching the first bolt, and the first bolt passes through the first mounting hole 307, so that the outer ring of the magnetic steel pressure plate 3 and the rotor disk 2 are fixed; the second fastener 7 includes a second bolt and a second nut, and the second bolt passes through the second mounting hole 601 of the rotor disk pressure plate 6, the third mounting hole 305 of the magnetic steel pressure plate 3 and the fourth mounting hole 207 of the rotor disk 2 and is fastened by the second nut, so that the inner ring of the magnetic steel pressure plate 3 and the rotor disk 2 are fixed together; through the fastening of the first fastener 5 and the second fastener 7, the magnetic steel 4 is pressed between the rotor disk 2 and the magnetic steel pressure plate 3 to form the magnetic steel flow channel 204, and each flow channel is also connected.

[0048] In some embodiments, the rotor disk 2 is provided with magnetic steel installation grooves distributed in a circular array, the bottom of the magnetic steel installation grooves constitutes a magnetic steel installation surface 206, and the radial sides of the magnetic steel installation surface 206 are respectively provided with support steps 209 for supporting the magnetic steel 4, so that a magnetic steel flow channel 204 is formed between the magnetic steel installation surface 206 and the magnetic steel 4; each magnetic steel flow channel 204 is respectively provided with a second radial flow channel 203 and a third radial flow channel 205. The magnetic steel 4 is supported on two support steps 209, and the gap formed between the first surface 403 of the magnetic steel 4 and the magnetic steel installation surface 206 is the magnetic steel flow channel 204; the surrounding side walls of the magnetic steel installation groove form a seal with the surrounding side surfaces of the magnetic steel 4.

[0049] In some embodiments, support bosses 401 are respectively provided at both radial ends of the magnetic steel 4, and the inner and outer rings of the magnetic steel pressure plate 3 are respectively pressed on the corresponding support bosses 401. The magnetic steel 4 of the dual-rotor axial flux motor uses the magnetic steel pressure plate 3 to fix the outer ring through the first bolt, fix the inner ring through the second bolt, and fix the inner and outer circles at the same time, so as to complete the fixation of the magnetic steel 4 in the rotor assembly; and the two support bosses 401 of the magnetic steel 4 are respectively in contact with the support steps on the magnetic steel mounting surface 206 of the rotor disk 2, so that the first surface 403 of the magnetic steel 4 and the magnetic steel mounting surface 206 of the rotor disk 2 form a magnetic steel flow channel 204; and the magnetic steel pressure plate 3 is correspondingly provided with a magnetic steel avoidance cavity 306, the magnetic steel 4 protrudes into the magnetic steel avoidance cavity 306, the second surface 402 of the magnetic steel 4 faces the stator assembly 8, and the second surface 402 of the magnetic steel 4 is also flush with the end surface of the magnetic steel pressure plate 3 facing the stator assembly 8.

[0050] The axial height of the support boss 401 is lower than the second surface 402 of the magnetic steel 4 , and the inner and outer rings of the magnetic steel pressure plate 3 are pressed on the two support bosses 401 , which also has a limiting effect on the magnetic steel pressure plate 3 .

[0051] The cooling structure of the dual-rotor axial flux motor provided by the utility model also includes a rotor disk pressure plate 6, a first radial flow channel 201 is arranged on the end surface of the rotor disk 2 facing away from the magnetic steel pressure plate 3, and the rotor disk pressure plate 6 is fixed to the rotor disk 2 through a second fastening assembly and seals the first radial flow channel 201.

[0052] The second bolt passes through the second mounting hole 601 on the rotor disk pressure plate 6, the third mounting hole 305 set on the inner ring of the magnetic steel pressure plate 3, and then passes through the fourth mounting hole 207 on the rotor disk 2. The second bolt is used to tighten, so as to seal the first radial flow channel 201.

[0053] Optionally, a limiting recess 208 is provided on the inner ring of the rotor disk 2 , and the rotor disk pressure plate 6 is just sunk into the limiting recess 208 .

[0054] The installation process of the dual-rotor axial flux motor provided in the present application is as follows: the rotor disk 2 is axially fixed on the rotating shaft 1 by using a rotor disk pressure plate 6, and a second mounting hole 601 (magnetic steel pressure plate 3 inner ring fixing bolt) is opened, and the mating surface 602 of the rotor disk pressure plate 6 cooperates with the end surface of the rotor disk 2 provided with the first radial flow channel 201 and the first axial flow channel 202 to achieve a seal lower than the radial flow channel.

[0055] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0056] Based on the same inventive concept, an embodiment of the present application also provides a vehicle, including the cooling structure of the dual-rotor axial flux motor.

[0057] The vehicle provided by the embodiment of the utility model adopts the motor that can directly cool the magnetic steel 4, thereby improving the cooling effect of the rotor and the magnetic steel 4 in the motor, thereby improving the working performance of the motor.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooling structure for a dual-rotor axial flux motor, characterized in that: include: The rotating shaft (1) is provided with an oil storage cavity (101) and a cooling flow channel (102) communicating with the oil storage cavity (101); Two groups of rotor components are installed at both ends of the rotating shaft (1), including a rotor disk (2), a magnetic steel pressure plate (3) and a magnetic steel (4); the magnetic steel (4) is pressed between the rotor disk (2) and the magnetic steel pressure plate (3) by a first fastening component; a first lower flow channel, a magnetic steel mounting surface (206) and a first upper flow channel are sequentially arranged on the rotor disk (2) in a radial direction from the center thereof to the outside; the magnetic steel (4) is mounted on the magnetic steel mounting surface (206); a magnetic steel flow channel (204) is formed between the magnetic steel (4) and the magnetic steel mounting surface (206) of the rotor disk (2); the first lower flow channel is connected to the cooling flow channel (102); the first lower flow channel is connected to the first upper flow channel through the magnetic steel flow channel (204), thereby directly cooling the magnetic steel (4); as well as The stator assembly (8) is arranged between the two sets of rotor assemblies.

2. The cooling structure of the dual-rotor axial flux motor according to claim 1, characterized in that: The inner ring of the magnetic steel pressure plate (3) is provided with a second lower flow channel, and the outer ring is provided with a second upper flow channel; the first lower flow channel is connected to the magnetic steel flow channel (204) through the second lower flow channel, and the second upper flow channel is connected to the first upper flow channel; the magnetic steel pressure plate (3) is closely attached to the end face of the stator assembly (8), and the opening of the second upper flow channel faces the end face of the stator assembly (8), thereby directly cooling the stator assembly (8).

3. The cooling structure of the dual-rotor axial flux motor according to claim 2, characterized in that: The first lower flow channel comprises a first radial flow channel (201) and a first axial flow channel (202), the first radial flow channel (201) being connected to the cooling flow channel (102), and the first axial flow channel (202) being connected to the first radial flow channel (201); the second lower flow channel comprises a fourth radial flow channel (301) and a first circumferential flow channel (302), the first circumferential flow channel (302) being arranged in a closed loop in the inner ring of the magnetic steel pressure plate (3), the fourth radial flow channel (301) being connected to the first axial flow channel (202) and the first circumferential flow channel (302), and the first circumferential flow channel (302) being connected to the magnetic steel flow channel (204).

4. The cooling structure of the dual-rotor axial flux motor according to claim 3, characterized in that: The rotor disk (2) is also provided with a second radial flow channel (203) connecting the first circumferential flow channel (302) and the magnetic steel flow channel (204).

5. The cooling structure of the dual-rotor axial flux motor according to claim 4, characterized in that: The first upper flow channel comprises a third radial flow channel (205) connected to the magnetic steel flow channel (204); the second upper flow channel comprises a second circumferential flow channel (303) and a second axial flow channel (304) arranged on the outer ring of the magnetic steel pressure plate (3); the third radial flow channel (205) and the second axial flow channel (304) are both connected to the second circumferential flow channel (303); the opening of the second axial flow channel (304) faces the end face of the stator assembly (8).

6. The cooling structure of the dual-rotor axial flux motor according to claim 5, characterized in that: The outer ring of the magnetic steel pressure plate (3) is evenly provided with a plurality of first mounting holes (307) along the circumferential direction, and the second circumferential flow channel (303) is arranged in sections to avoid the first mounting holes (307).

7. The cooling structure of the dual-rotor axial flux motor according to claim 5, characterized in that: The rotor disk (2) is provided with magnetic steel mounting grooves distributed in a circular array, the groove bottoms of the magnetic steel mounting grooves constitute the magnetic steel mounting surface (206), and support steps (209) for supporting the magnetic steel (4) are respectively provided on both radial sides of the magnetic steel mounting surface (206), so that the magnetic steel flow channel (204) is formed between the magnetic steel mounting surface (206) and the magnetic steel (4); each magnetic steel flow channel (204) is respectively provided with the second radial flow channel (203) and the third radial flow channel (205).

8. The cooling structure of the dual-rotor axial flux motor according to claim 7, characterized in that: Support bosses (401) are respectively provided at both radial ends of the magnetic steel (4), and the inner ring and outer ring of the magnetic steel pressure plate (3) are respectively pressed tightly on the corresponding support bosses (401).

9. The cooling structure of the dual-rotor axial flux motor according to any one of claims 3 to 8, characterized in that: It also includes a rotor disk pressure plate (6), wherein the first radial flow channel (201) is arranged on the end surface of the rotor disk (2) facing away from the magnetic steel pressure plate (3), and the rotor disk pressure plate (6) is fixed to the rotor disk (2) through a second fastening component and seals the first radial flow channel (201).

10. A vehicle, characterized in that: A cooling structure comprising a dual-rotor axial flux motor as described in any one of claims 1 to 9.

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