Air-cooled axial magnetic flux motor

Abstract

The utility model provides an air-cooled axial flux motor, comprising a housing, a first rotor and a second rotor, the housing, the first rotor and the second rotor enclose to form an accommodation space, and a stator assembly is arranged in the accommodation space; a plurality of first blades are arranged on the first rotor, first air guide grooves are formed between every two adjacent first blades, first air guide holes are formed in the ends, close to the center of the first rotor, of the first air guide grooves, first through holes are formed in the shell, and the first through holes are communicated with the first air guide grooves through the containing space, the first air guide holes and the first through holes to form a first cooling air channel; a plurality of second blades are arranged on the second rotor, a second air guide groove is formed between every two adjacent second blades, a second air guide hole is formed in the end, close to the center of the second rotor, of each second air guide groove, a second through hole is formed in the shell, and the second through hole is communicated with the second air guide grooves through the containing space and the second air guide holes to form a second cooling air channel. According to the utility model, efficient heat dissipation of the whole motor can be realized, and the service life of the motor can be effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an air-cooled axial flux motor. Background Art

[0002] Compared with traditional radial flux motors, axial flux motors have the advantages of flat and compact structure and high power density. Axial flux motors have good application prospects in aerospace, ship propulsion, electric vehicles and other fields where weight and space are limited.

[0003] At present, axial flux motors generally use air cooling and water cooling to achieve the purpose of heat dissipation, avoiding the risk of demagnetization of the permanent magnets in the axial flux motor due to overheating. However, the existing water-cooled axial flux motor has a complex structure and requires external cooling equipment, resulting in the overall motor being too large, heavy, and having high manufacturing costs; and the existing air-cooled axial flux motor has no cooling air duct, low cooling efficiency, resulting in poor internal heat dissipation effect, which seriously affects the service life of the motor. Utility Model Content

[0004] Based on this, the purpose of the present invention is to provide an air-cooled axial flux motor, which aims to solve the technical problem that the air-cooled axial flux motor in the prior art has no cooling air duct, low cooling efficiency, poor internal heat dissipation effect, and seriously affects the service life of the motor.

[0005] The present invention aims to provide an air-cooled axial flux motor, comprising a housing, a first rotor and a second rotor connected to both ends of the housing, wherein the housing, the first rotor and the second rotor together form an accommodation space, and a stator assembly is provided in the accommodation space;

[0006] A plurality of first blades are provided at intervals on a side of the first rotor facing away from the stator assembly, a first air guide slot is provided between two adjacent first blades, a first air guide hole is provided at one end of the first air guide slot close to the center of the first rotor, a first through hole is provided at an end of the housing connected to the first rotor at a position corresponding to the first air guide slot, the first through hole being connected to the first air guide hole and the first air guide slot to form a first cooling air duct;

[0007] A plurality of second blades are provided at intervals on the side of the second rotor facing away from the stator assembly, a second air guide groove is provided between two adjacent second blades, a second air guide hole is provided at one end of the second air guide groove close to the center of the second rotor, a second through hole is provided at the end of the shell connected to the second rotor at a position corresponding to the second air guide groove, and the second through hole is connected to the second air guide groove through the accommodating space and the second air guide hole to form a second cooling air duct.

[0008] Compared with the prior art, the beneficial effect of the air-cooled axial flux motor of the present invention is that by setting the first cooling air duct and the second cooling air duct, efficient heat dissipation of the entire motor is achieved. When the motor is working, external air circulates in the first cooling air duct and the second cooling air duct. Specifically, the external air enters the first through hole and the second through hole on the shell into the accommodating space formed by the first rotor, the shell and the second rotor, so as to fully contact the surface of the stator assembly, and finally is discharged to the outside through the first air guide hole and the first air guide groove on the first rotor, and the second air guide hole and the second air guide groove on the second rotor. The circulation of external air can achieve rapid heat dissipation of the first rotor, the second rotor and the stator assembly, thereby improving the overall heat dissipation effect of the motor and effectively extending the service life of the motor.

[0009] In addition, the air-cooled axial flux motor according to the present invention may also have the following additional technical features:

[0010] Furthermore, a plurality of first blades are evenly spaced around the center of the first rotor, each first blade is respectively arranged along the radial direction of the first rotor, and the slot width of the first air guide slot gradually increases from the center of the first rotor toward the outer edge of the first rotor.

[0011] Furthermore, the first air guide hole is arranged along the axial direction of the first rotor and passes through the first rotor.

[0012] Furthermore, a plurality of second blades are evenly spaced around the center of the second rotor, each second blade is respectively arranged along the radial direction of the second rotor, and the slot width of the second air guide slot gradually increases from the center of the second rotor toward the outer edge of the second rotor.

[0013] Furthermore, the second air guide hole is arranged along the axial direction of the second rotor and passes through the second rotor.

[0014] Furthermore, the air-cooled axial flux motor further includes a first cover plate, which is arranged on a side of the first rotor facing away from the stator assembly to cover the first air guide slot.

[0015] Furthermore, the air-cooled axial flux motor further includes a second cover plate, which is arranged on a side of the second rotor facing away from the stator assembly to cover the second air guide slot.

[0016] Furthermore, the stator assembly includes a stator core and a stator winding arranged inside the stator core, and the stator core is coaxially arranged with the first rotor and the second rotor respectively.

[0017] Furthermore, the air-cooled axial flux motor also includes a motor shaft, and a first bearing and a second bearing adapted to the motor shaft, the motor shaft includes a connecting portion and a rotating shaft portion integrally connected to the connecting portion, the connecting portion is fastened to the first rotor through a plurality of connecting parts, the rotating shaft portion passes through the middle of the first rotor and is rotatably connected to the stator core through the first bearing and the second bearing, wherein the first bearing is arranged at one end of the rotating shaft portion close to the connecting portion, and the second bearing is arranged at one end of the rotating shaft portion away from the connecting portion.

[0018] Furthermore, the air-cooled axial flux motor also includes a locking ring and a sealing ring. The locking ring is sleeved on the end of the rotating shaft away from the connecting part and is located on the side of the second bearing away from the first bearing; the sealing ring is arranged in the gap between the stator core and the second rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural diagram of the air-cooled axial flux motor of the present invention;

[0020] Figure 2 This is a cross-sectional structural diagram of the air-cooled axial flux motor of the present invention;

[0021] Figure 3 This is an exploded structural diagram of the air-cooled axial flux motor of the present invention;

[0022] Figure 4 This is a schematic structural diagram of the first rotor in the air-cooled axial flux motor of the present invention;

[0023] Figure 5 This is a schematic structural diagram of the second rotor in the air-cooled axial flux motor of the present invention;

[0024] Figure 6 This is a schematic diagram of the air flow path of the air-cooled axial flux motor of the present invention.

[0025] Among them, the above-mentioned drawings include the following figure marks: 10-housing; 101-first through hole; 102-second through hole; 20-first rotor; 21-first blade; 22-first step surface; 201-first air guide groove; 202-first air guide hole; 203-mounting groove; 204-connecting through hole; 30-second rotor; 31-second blade; 32-second step surface; 301-second air guide groove; 302-second air guide hole; 303-accommodating through hole; 40-stator assembly; 41-stator core; 42-stator winding; 51-first cover plate; 52-second cover plate; 61-motor shaft; 611-connecting part; 612-rotating shaft part; 62-first bearing; 63-second bearing; 64-locking ring; 65-sealing ring; 70-connecting part.

[0026] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0027] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] See also Figures 1 to 5 , shown is an air-cooled axial flux motor in the present invention, including a housing 10, a first rotor 20 and a second rotor 30 respectively connected to the two ends of the housing 10, the housing 10, the first rotor 20 and the second rotor 30 together form an accommodating space, and a stator assembly 40 is provided in the accommodating space.

[0031] As an example, a plurality of first blades 21 are spaced apart on a side of the first rotor 20 facing away from the stator assembly 40. These first blades 21 are evenly spaced around the center of the first rotor 20, and each first blade 21 is arranged radially along the first rotor 20. Alternatively, the plurality of first blades 21 are radially arranged along the radial direction of the first rotor 20 on the side of the first rotor 20 facing away from the stator assembly 40. A first air guide slot 201 is provided between two adjacent first blades 21. The slot width of the first air guide slot 201 gradually increases from the center of the first rotor 20 toward the outer edge of the first rotor 20. Furthermore, a first air guide hole 202 is provided at one end of the first air guide slot 201 near the center of the first rotor 20. The first air guide hole 202 is arranged along the axis of the first rotor 20 and extends through the first rotor 20. As a specific example, in this embodiment, the first air guide hole 202 is a waist-shaped hole, with its major axis arranged radially along the first rotor 20.

[0032] Furthermore, a mounting groove 203 is provided in the middle of the side of the first rotor 20 facing away from the stator assembly 40. The mounting groove 203 is used to install the motor shaft 61. The bottom of the mounting groove 203 is provided with a plurality of connecting through holes 204. The plurality of connecting through holes 204 are evenly spaced around the center of the first rotor 20. The connecting through holes 204 are used to cooperate with the connecting member 70 to achieve a fastening connection between the motor shaft 61 and the first rotor 20. In this embodiment, the connecting member 70 can be a connecting bolt.

[0033] Furthermore, a first step surface 22 is provided on the side of the first rotor 20 close to the stator assembly 40. The first step surface 22 is adapted to the end of the housing 10 so that the first rotor 20 can be covered on one end of the housing 10 and the housing 10 and the first rotor 20 can be fastened together by a plurality of fasteners. A first through hole 101 is provided on the end of the shell 10 connected to the first rotor 20 at a position corresponding to the first air guide groove 201. As a specific example, in this embodiment, the first through hole 101 is a waist-shaped hole structure, and the long axis direction of the waist-shaped hole is arranged along the circumference of the shell 10, and the total length of the waist-shaped hole in the long axis direction is greater than the maximum slot width of the first air guide groove 201. In actual use, the first through hole 101 is connected to the first air guide groove 201 through the accommodating space formed by the shell 10, the first rotor 20 and the second rotor 30, and the first air guide hole 202 is connected to the first air guide groove 201 to form a first cooling air duct. It can also be said that the first through hole 101 is connected to the first air guide groove 201 through the gap between the stator assembly 40 and the lower surface of the first rotor 20, and the first air guide hole 202 is connected to the first air guide groove 201 to form a first cooling air duct.

[0034] Furthermore, the air-cooled axial flux motor of the present application also includes a first cover plate 51. Specifically, in this embodiment, the first cover plate 51 is a circular ring structure. The first cover plate 51 is arranged on the side of the first rotor 20 away from the stator assembly 40 to cover the first air guide groove 201.

[0035] As an example, a plurality of second blades 31 are spaced apart on a side of the second rotor 30 facing away from the stator assembly 40. The plurality of second blades 31 are evenly spaced around the center of the second rotor 30. Each second blade 31 is arranged radially along the second rotor 30. Alternatively, the plurality of second blades 31 are radially arranged along the radial direction of the second rotor 30 on the side of the second rotor 30 facing away from the stator assembly 40. A second air guide slot 301 is provided between two adjacent second blades 31. The slot width of the second air guide slot 301 gradually increases from the center of the second rotor 30 toward the outer edge of the second rotor 30. Furthermore, a second air guide hole 302 is provided at one end of the second air guide slot 301 near the center of the second rotor 30. The second air guide hole 302 is arranged along the axis of the second rotor 30 and extends through the second rotor 30. As a specific example, in this embodiment, the second air guide hole 302 is a circular through-hole.

[0036] Furthermore, a receiving hole 303 is provided in the middle of the second rotor 30 for accommodating the end of the stator core 41. A second stepped surface 32 is provided on the side of the second rotor 30 near the stator assembly 40. The second stepped surface 32 mates with the end of the housing 10, allowing the second rotor 30 to be placed over the other end of the housing 10 and secured to the housing 10 via a plurality of fasteners. In this embodiment, a second through hole 102 is provided on the end of the shell 10 connected to the second rotor 30 at a position corresponding to the second air guide groove 301. As a specific example, in this embodiment, the second through hole 102 is a waist-shaped hole structure, and the long axis direction of the waist-shaped hole is arranged along the circumference of the shell 10, and the total length of the waist-shaped hole in the long axis direction is greater than the maximum slot width of the second air guide groove 301. In actual use, the second through hole 102 is connected with the second air guide groove 301 through the accommodating space formed by the shell 10, the first rotor 20 and the second rotor 30 to form a second cooling air duct. In other words, the second through hole 102 is connected with the second air guide groove 301 through the gap between the stator assembly 40 and the upper surface of the second rotor 30, and the second air guide hole 302 is connected with the second air guide groove 301 to form a second cooling air duct.

[0037] Furthermore, the air-cooled axial flux motor of the present application also includes a second cover plate 52. Specifically, in this embodiment, the second cover plate 52 is a circular ring structure. The second cover plate 52 is arranged on the side of the second rotor 30 away from the stator assembly 40 to cover the second air guide groove 301.

[0038] As an example, the stator assembly 40 includes a stator core 41 and a stator winding 42 disposed inside the stator core 41 . The stator core 41 is coaxially disposed with the first rotor 20 and the second rotor 30 .

[0039] Furthermore, the air-cooled axial flux motor of the present application also includes a motor shaft 61, and a first bearing 62 and a second bearing 63 adapted to the motor shaft 61. Specifically, the motor shaft 61 includes a connecting portion 611 and a rotating shaft portion 612 integrally connected to the connecting portion 611. The connecting portion 611 is fastened to the first rotor 20 through a plurality of connecting members 70. The rotating shaft portion 612 passes through the middle of the first rotor 20 and is rotatably connected to the stator core 41 through the first bearing 62 and the second bearing 63. The first bearing 62 is arranged at one end of the rotating shaft portion 612 close to the connecting portion 611, and the second bearing 63 is arranged at one end of the rotating shaft portion 612 away from the connecting portion 611.

[0040] Furthermore, the air-cooled axial flux motor of the present application further includes a locking ring 64 and a sealing ring 65. The locking ring 64 is sleeved on the end of the rotating shaft portion 612 away from the connecting portion 611 and is located on the side of the second bearing 63 facing away from the first bearing 62 to limit the position of the second bearing 63. The sealing ring 65 is disposed in the gap between the stator core 41 and the second rotor 30. Specifically, the sealing ring 65 is sleeved on the end of the stator core 41 to seal the gap between the end of the stator core 41 and the wall of the receiving through hole 303 in the second rotor 30.

[0041] In actual use, the working principle of the air-cooled axial flux motor of the present invention can be as follows: Figure 6 As shown, the motor shaft 61 drives the first rotor 20, the second rotor 30 and the housing 10 to rotate together. During the rotation process, due to the action of centrifugal force, the external air will enter the accommodation space formed by the first rotor 20, the second rotor 30 and the housing 10 through the first through hole 101 and the second through hole 102 on the housing 10. After the external air enters the accommodation space, it will be divided into two parts and pass through the first cooling air duct and the second cooling air duct respectively to achieve efficient heat dissipation. Specifically, one part will pass through the gap between the stator assembly 40 and the lower surface of the first rotor 20 to align with the stator winding 42 and the first rotor 20. The cooling air will exchange heat with the surface of the stator core 41 and the stator winding 42, and finally be discharged outward through the first air guide hole 202 and the first air guide groove 201; the other part will pass through the gap between the stator assembly 40 and the upper surface of the second rotor 30 to exchange heat with the surface of the stator winding 42 and the second rotor 30, and finally be discharged outward through the second air guide hole 302 and the second air guide groove 301. It should be understood that the cooling air can fully contact the surface of the stator core 41 and the stator winding 42 during the flow of the first cooling air duct and the second cooling air duct. That is to say, the interior of the motor can be directly and efficiently cooled, thereby achieving the purpose of efficient heat dissipation.

[0042] In summary, the beneficial effect of the air-cooled axial flux motor of the present invention is that by setting the first cooling air duct and the second cooling air duct, efficient heat dissipation of the entire motor is achieved. When the motor is working, external air will circulate in the first cooling air duct and the second cooling air duct. Specifically, the external air will enter the accommodating space formed by the first rotor, the shell and the second rotor from the first through hole and the second through hole on the shell, so as to fully contact the surface of the stator assembly, and finally be discharged to the outside through the first air guide hole and the first air guide groove on the first rotor, and the second air guide hole and the second air guide groove on the second rotor. The circulation of external air can achieve rapid heat dissipation of the first rotor, the second rotor and the stator assembly, thereby improving the overall heat dissipation effect of the motor and effectively extending the service life of the motor.

[0043] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0044] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An air-cooled axial flux motor, characterized in that: It includes a housing, a first rotor and a second rotor respectively connected to both ends of the housing, wherein the housing, the first rotor and the second rotor together form an accommodation space, and a stator assembly is provided in the accommodation space; A plurality of first blades are provided at intervals on a side of the first rotor facing away from the stator assembly, a first air guide slot is provided between two adjacent first blades, a first air guide hole is provided at one end of the first air guide slot close to the center of the first rotor, a first through hole is provided at an end of the housing connected to the first rotor at a position corresponding to the first air guide slot, the first through hole being connected to the first air guide hole and the first air guide slot to form a first cooling air duct; A plurality of second blades are provided at intervals on the side of the second rotor facing away from the stator assembly, a second air guide groove is provided between two adjacent second blades, a second air guide hole is provided at one end of the second air guide groove close to the center of the second rotor, a second through hole is provided at the end of the shell connected to the second rotor at a position corresponding to the second air guide groove, and the second through hole is connected to the second air guide groove through the accommodating space and the second air guide hole to form a second cooling air duct.

2. The air-cooled axial flux motor according to claim 1, characterized in that: A plurality of first blades are evenly spaced around the center of the first rotor, each first blade is arranged along the radial direction of the first rotor, and the slot width of the first air guide slot gradually increases from the center of the first rotor toward the outer edge of the first rotor.

3. The air-cooled axial flux motor according to claim 1, characterized in that: The first air guide hole is arranged along the axial direction of the first rotor and passes through the first rotor.

4. The air-cooled axial flux motor according to claim 1, characterized in that: A plurality of second blades are evenly spaced around the center of the second rotor, each second blade is respectively arranged along the radial direction of the second rotor, and the slot width of the second air guide slot gradually increases from the center of the second rotor toward the outer edge of the second rotor.

5. The air-cooled axial flux motor according to claim 1, characterized in that: The second air guide hole is arranged along the axial direction of the second rotor and passes through the second rotor.

6. The air-cooled axial flux motor according to claim 1, characterized in that: The air-cooled axial flux motor further includes a first cover plate, which is arranged on a side of the first rotor facing away from the stator assembly to cover the first air guide slot.

7. The air-cooled axial flux motor according to claim 1, characterized in that: The air-cooled axial flux motor further includes a second cover plate, which is arranged on a side of the second rotor facing away from the stator assembly to cover the second air guide slot.

8. The air-cooled axial flux motor according to claim 1, characterized in that: The stator assembly includes a stator core and a stator winding arranged inside the stator core. The stator core is coaxially arranged with the first rotor and the second rotor respectively.

9. The air-cooled axial flux motor according to claim 8, characterized in that: The air-cooled axial flux motor also includes a motor shaft, and a first bearing and a second bearing adapted to the motor shaft. The motor shaft includes a connecting portion and a rotating shaft portion integrally connected to the connecting portion. The connecting portion is fastened to the first rotor through a plurality of connecting members. The rotating shaft portion passes through the middle of the first rotor and is rotatably connected to the stator core through the first bearing and the second bearing, wherein the first bearing is arranged at one end of the rotating shaft portion close to the connecting portion, and the second bearing is arranged at one end of the rotating shaft portion away from the connecting portion.

10. The air-cooled axial flux motor according to claim 9, characterized in that: The air-cooled axial flux motor also includes a locking ring and a sealing ring. The locking ring is sleeved on the end of the rotating shaft away from the connecting part and is located on the side of the second bearing away from the first bearing; the sealing ring is arranged in the gap between the stator core and the second rotor.

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