Heat dissipation shell and axial flux motor

Abstract

The utility model provides a heat dissipation housing and an axial flux motor, the heat dissipation housing comprises a housing and a sealing cover, the housing comprises a bottom plate, an inner side plate arranged at the inner edge of the bottom plate and an outer side plate arranged at the outer edge of the bottom plate, a stator cavity used for arranging a stator is formed between the inner side plate and the outer side plate, and the sealing cover is arranged in the stator cavity. One surface, facing the stator cavity, of the bottom plate is recessed to form a cooling flow channel, and the outer side plate is provided with a liquid inlet and a liquid outlet which are communicated with the cooling flow channel; one surface of the sealing cover seals the cooling flow channel, and the other surface of the sealing cover is in contact with the stator; wherein the rigidity of the shell is larger than that of the sealing cover, and the heat conductivity coefficient of the sealing cover is larger than that of the shell. The sealing cover between the cooling flow channel and the stator is made of the high-heat-conduction material, and the shell used for bearing torque is made of the high-strength material, so that the motor has a good heat dissipation effect while the rigidity is ensured, and the motor can adapt to more working scenes.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a heat dissipation housing and an axial flux motor. Background Art

[0002] With the widespread application of disc motors in high-performance, high-torque output applications, the design of their cooling systems has become a key factor restricting their further development.

[0003] Currently, the mainstream cooling method for disc motors is water cooling. The basic principle is to design water channels inside the motor housing and use the continuously circulating coolant to absorb and remove the heat generated during the operation of the motor. Therefore, this requires that the medium between the water channels that generates heat has good thermal conductivity. Aluminum is a good choice, with good thermal conductivity and good machinability. However, if the entire housing is made of aluminum, the motor cannot adapt to the working environment of high torque output. Conversely, if all the housing materials are replaced with cast iron, although the rigidity of the housing can be improved to meet the stability requirements under extreme working conditions, the thermal conductivity will be significantly reduced. Utility Model Content

[0004] Based on this, the purpose of the present invention is to provide a heat dissipation housing and an axial flux motor, which are used to solve the technical problems mentioned in the above background technology.

[0005] On one hand, the present invention provides a heat dissipation housing, comprising:

[0006] a housing, the housing comprising a bottom plate, an inner plate provided at an inner edge of the bottom plate, and an outer plate provided at an outer edge of the bottom plate, a stator cavity for arranging a stator being formed between the inner plate and the outer plate, a cooling channel being formed in a recessed manner on a side of the bottom plate facing the stator cavity, and a liquid inlet and a liquid outlet being provided on the outer plate for communicating with the cooling channel;

[0007] a sealing cover, one side of which seals the cooling channel and the other side of which contacts the stator;

[0008] The rigidity of the shell is greater than that of the sealing cover, and the thermal conductivity of the sealing cover is greater than that of the shell.

[0009] Furthermore, the heat dissipation housing is made of cast iron or steel, and the sealing cover is made of aluminum or copper.

[0010] Furthermore, in the heat dissipation housing, the annular array in the cooling channel has a plurality of fixing platforms for mounting the stator, and the sealing cover is provided with openings that cooperate with the fixing platforms.

[0011] Furthermore, in the heat dissipation housing, a first groove is provided on the outer wall of the fixing platform, and a first O-ring is provided in the first groove, and the first O-ring is radially sealed and fitted between the inner wall of the opening and the fixing platform.

[0012] Furthermore, the heat dissipation shell, wherein the periphery of the fixed platform is provided with a base for receiving the sealing cover, the base is provided with a second groove surrounding the fixed platform, a second O-ring or structural adhesive is provided in the second groove, and the second O-ring or the structural adhesive is axially sealed between the sealing cover and the base.

[0013] Furthermore, the heat dissipation housing, wherein the base plate has a mounting plane surrounding the inner and outer sides of the cooling channel, a plurality of screw holes are provided in a circular array on the mounting plane, and the sealing cover is provided with fixing holes aligned with the screw holes, the fixing holes are used for screws to penetrate and cooperate with the screw holes, thereby realizing that the sealing cover closes the cooling channel.

[0014] Furthermore, the heat dissipation housing has an annular groove on the mounting plane, and a structural adhesive or a sealing ring is provided in the annular groove.

[0015] Furthermore, in the heat dissipation housing, the inner edge of the sealing cover is welded and fixed to the inner plate, and the outer edge of the sealing cover is welded and fixed to the outer plate.

[0016] Furthermore, the heat dissipation shell, wherein a baffle connecting the inner plate and the outer plate is provided in the cooling channel, the liquid inlet is connected to the cooling channel on the left side of the baffle, and the liquid outlet is connected to the cooling channel on the right side of the baffle.

[0017] Furthermore, the heat dissipation shell, wherein the cooling channel is provided with a spoiler assembly, the spoiler assembly includes a plurality of inner spoiler ribs and a plurality of outer spoiler ribs, the plurality of inner spoiler ribs are arranged in a ring array in the cooling channel, and one end extends to the inner plate, the outer spoiler ribs are arranged in a ring array in the cooling channel, and one end extends to the outer plate, and the inner spoiler ribs and the outer spoiler ribs are staggered.

[0018] Furthermore, in the heat dissipation shell, the end of the outer spoiler rib adjacent to the liquid inlet extends toward the baffle platform to form a first drainage rib, and the end of the outer spoiler rib adjacent to the liquid outlet extends toward the baffle platform to form a second drainage rib.

[0019] On the other hand, the present invention further provides an axial flux motor, comprising the heat dissipation housing described in the above technical solution.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] By making the sealing cover between the cooling channel and the stator from a high thermal conductivity material, and the shell used to bear the torque from a high-strength material, while ensuring rigidity and having a good heat dissipation effect, the motor can adapt to more working scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the heat dissipation housing of the first embodiment of the present invention;

[0023] Figure 2 This is an exploded view of the heat dissipation housing of the first embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the specific structure of the sealing cover in the first embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the specific structure of the housing in the first embodiment of the present utility model;

[0026] Figure 5 This is a schematic diagram of the specific structure of the housing in the second embodiment of the present utility model;

[0027] Description of main component symbols:

[0028] 10. Shell; 11. Bottom plate; 12. Inner plate; 13. Outer plate; 20. Sealing cover; 21. Fixing platform; 22. Opening; 23. First O-ring; 14. Cooling channel; 15. Liquid inlet; 16. Liquid outlet; 31. Mounting plane; 32. Screw hole; 33. Fixing hole; 34. Screw; 50. Annular groove; 61. Baffle; 62. Inner spoiler rib; 63. Outer spoiler rib; 64. First drainage rib; 65. Second drainage rib; 71. Support platform; 72. Second O-ring.

[0029] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] See also Figures 1 to 4 The heat dissipation housing in the first embodiment of the present utility model includes a housing 10 and a sealing cover 20. The housing 10 includes a bottom plate 11, an inner plate 12 provided at the inner edge of the bottom plate 11, and an outer plate 13 provided at the outer edge of the bottom plate 11. A stator cavity for arranging a stator is formed between the inner plate 12 and the outer plate 13. A cooling channel 14 is formed in a recessed manner on a side of the bottom plate 11 facing the stator cavity. A liquid inlet 15 and a liquid outlet 16 communicating with the cooling channel 14 are provided on the outer plate 13.

[0034] One side of the sealing cover 20 closes the cooling channel 14, and the other side contacts the stator;

[0035] The rigidity of the housing 10 is greater than the rigidity (tensile strength, yield strength) of the sealing cover 20 , and the thermal conductivity of the sealing cover 20 is greater than the thermal conductivity of the housing 10 .

[0036] By making the sealing cover 20 between the cooling channel 14 and the stator from a high thermal conductivity material, and the shell 10 for bearing the torque from a high-strength material, while ensuring rigidity and having a better heat dissipation effect, the motor can adapt to more working scenarios.

[0037] Specifically, in this embodiment, the material for preparing the shell 10 includes but is not limited to cast iron, and can also be a material with high rigidity such as steel. The material for preparing the sealing cover 20 includes but is not limited to aluminum, and can also be a material with good thermal conductivity such as copper.

[0038] See Figure 4The cooling channel 14 is annular in shape, and a baffle 61 connecting the inner plate 12 and the outer plate 13 is provided in the annular cooling channel 14. The baffle 61 is aligned with the center line of the bottom plate 11. The liquid inlet 15 is connected to the cooling channel 14 on the left side of the baffle 61, and the liquid outlet 16 is connected to the cooling channel 14 on the right side of the baffle 61. This design allows the coolant to flow unidirectionally along a predetermined path after entering the cooling channel 14 from the liquid inlet 15, ensuring that the coolant can evenly cover the heat source in the stator cavity, avoiding local overheating or insufficient cooling. In addition, the unidirectional flow allows the coolant to maintain a certain flow rate when flowing, thereby enhancing the convective heat exchange effect between the coolant and the heat source.

[0039] Further, see Figure 3 and Figure 4 The cooling channel 14 has a plurality of mounting platforms 21 arranged in an annular array within the cooling channel 14 for mounting the stator. The sealing cover 20 has openings 22 that mate with these mounting platforms 21. In practice, when the sealing cover 20 seals the cooling channel 14, the mounting platforms 21 emerge from the openings 22 in the sealing cover 20 for connection to the stator. Specifically, a through-hole is provided along the central axis of the mounting platform 21. This through-hole is used to insert a bolt that connects to the threaded hole at the bottom of the stator, thereby firmly securing the stator to the surface of the sealing cover 20.

[0040] To prevent coolant from leaking out of the opening 22 of the sealing cover 20, this embodiment proposes the following two sealing solutions. First, by adjusting the dimensions of the fixing platform 21 and the opening 22, after the sealing cover 20 closes the cooling channel 14, an interference fit is formed between the fixing platform 21 and the opening 22, thereby effectively preventing coolant from leaking through the tiny gap and achieving a sealing effect.

[0041] Secondly, by providing a first groove on the outer wall of the fixing platform 21 and disposing a first O-ring 23 in the first groove, when the sealing cover 20 closes the cooling channel 14, the first O-ring 23 can radially seal between the inner wall of the opening 22 and the fixing platform 21, thereby forming an effective sealing barrier.

[0042] In this embodiment, the technical solution of the first O-ring 23 is preferably adopted because the first O-ring 23 itself has a certain degree of elasticity and adaptability, and therefore it has relatively low requirements on the dimensional tolerance between the fixing platform 21 and the opening 22. This means that during the processing process, even if there is a certain dimensional deviation, the first O-ring 23 can compensate for it through its elastic deformation, thereby ensuring the sealing effect.

[0043] See Figures 2 to 4The base plate 11 has a mounting plane 31 surrounding the inner and outer sides of the cooling channel 14. The mounting plane 31 has a plurality of screw holes 32 in a circular array. The sealing cover 20 is provided with fixing holes 33 aligned with the screw holes 32. The fixing holes 33 are used for screws 34 to penetrate and cooperate with the screw holes 32, thereby enabling the sealing cover 20 to close the cooling channel 14.

[0044] Furthermore, to prevent coolant from leaking from the inner or outer edges of the sealing cover 20, this embodiment proposes the following two sealing solutions: First, an annular groove 50 is provided on the mounting surface 31, and structural adhesive is placed within the annular groove 50. When the sealing cover 20 seals the cooling channel 14, the structural adhesive fills and solidifies between the sealing cover 20 and the mounting surface 31, forming a sealed barrier that effectively prevents coolant from leaking from the inner or outer edges of the sealing cover 20;

[0045] Secondly, an annular groove 50 is provided on the mounting surface 31, and a sealing ring is provided in the annular groove 50. When the sealing cover 20 closes the cooling channel 14, the sealing ring fits tightly between the sealing cover 20 and the mounting surface 31, thereby forming a sealed barrier that effectively prevents coolant from leaking from the inner or outer edges of the sealing cover 20.

[0046] For further information, see Figure 4 A spoiler component is provided in the cooling channel 14, which is used to achieve turbulence and extend the flow path of the coolant in the cooling channel 14, so that the coolant has a longer contact time with the heat source (such as the stator), ensuring that the coolant can fully exchange heat with the heat source and improve the heat transfer effect.

[0047] Specifically, in this embodiment, the spoiler assembly includes a plurality of inner spoiler ribs 62 and a plurality of outer spoiler ribs 63. The plurality of inner spoiler ribs 62 are arranged in a ring array in the cooling channel 14, and one end extends to the inner plate 12. The outer spoiler ribs 63 are arranged in a ring array in the cooling channel 14, and one end extends to the outer plate 13. The inner spoiler ribs 62 and the outer spoiler ribs 63 are staggered so that the cooling channel 14 forms an S shape.

[0048] Furthermore, the inner spoiler rib 62 is integrally connected to the fixing platform 21 at one end away from the inner plate 12. This design allows the inner spoiler rib 62 to not only spoil the flow but also serve as a reinforcement rib for the fixing platform 21 to increase the rigidity of the fixing platform 21.

[0049] Furthermore, the end of the outer spoiler rib 63 adjacent to the liquid inlet 15 extends toward the baffle 61 to form a first diversion rib 64, and the end of the outer spoiler rib 63 adjacent to the liquid outlet 16 extends toward the baffle 61 to form a second diversion rib 65. Specifically, the first diversion rib 64 and the second diversion rib 65 are both arc-shaped, and a gap is formed between them and the baffle 61. The main function of the first diversion rib 64 is to guide the coolant entering from the liquid inlet 15 to flow along a specific path, ensuring that the coolant can enter the cooling channel 14 smoothly and orderly, laying a good foundation for the subsequent heat exchange process. Similarly, the second diversion rib 65 is responsible for guiding the coolant to be discharged from the liquid outlet 16, reducing the backflow and mixed flow of the coolant near the liquid outlet 16, and ensuring that the coolant can smoothly leave the cooling channel 14, thereby improving the fluidity and efficiency of the entire cooling system.

[0050] Finally, it should be noted that in this embodiment, the motor housing is composed of two heat dissipation shells spliced together, with a rotor disposed between the two heat dissipation shells. The liquid outlet 16 of one heat dissipation shell can be connected to the liquid inlet 15 of the other heat dissipation shell via a pipe, thereby achieving a series connection of the cooling channels 14. This allows the motor to circulate the coolant through both heat dissipation shells with only one pump structure. Of course, to enhance the cooling effect of the coolant, the heat dissipation shells can also use separate pump structures, each of which can circulate the coolant within its own cooling channel 14.

[0051] In practical applications, in order to ensure the flatness of the stator mounting surface and the distance from the air gap surface, the surface of the sealing cover 20 can be spotfaced after the sealing cover 20 is installed. During processing, in order to prevent the cutter head from hitting the housing 10, the upper surface of the sealing cover 20 is allowed to be slightly higher than the upper surface of the base plate 11.

[0052] In summary, the heat dissipation housing in the above-mentioned embodiments of the present invention is made of a high thermal conductivity material for the sealing cover 20 between the cooling channel 14 and the stator, and the housing 10 for bearing the torque is made of a high-strength material, thereby ensuring rigidity while having a better heat dissipation effect, so that the motor can adapt to more working scenarios.

[0053] See Figure 5, shown is a heat dissipation housing in a second embodiment of the present invention. The heat dissipation housing in this embodiment differs from the heat dissipation housing in the first embodiment in that: a base 71 for receiving the sealing cover 20 is provided on the periphery of the fixing platform 21, and a second groove surrounding the fixing platform 21 is provided on the base 71. A second O-ring 72 or structural adhesive is provided in the second groove. When the sealing cover 20 closes the cooling flow channel 14, the second O-ring 72 or structural adhesive can axially seal between the sealing cover 20 and the base 71. In this embodiment, the second O-ring 72 is preferably used for sealing.

[0054] It should be noted that, in this embodiment, there are two ways to seal the opening 22 of the sealing cover 20. First, only the second O-ring 72 or structural adhesive on the support 71 is axially sealed between the sealing cover 20 and the support 71 to prevent leakage of the coolant.

[0055] Secondly, on the basis of the radial sealing cooperation of the first O-ring 23 in the first embodiment, an additional base 71 is added, and an axial sealing cooperation is achieved through the second O-ring 72 or structural adhesive on the base 71, thereby achieving double sealing in the radial direction and the axial direction of the opening 22, which can prevent the coolant from leaking to a large extent.

[0056] The heat dissipation housing in the third embodiment of the present invention differs from the heat dissipation housing in the first embodiment in that the fixing holes 33 on the sealing cover 20 and the screw holes 32 on the mounting plane 31 are eliminated, and the sealing cover 20 is directly fixed to the mounting plane 31 by welding. Specifically, in this embodiment, the sealing cover 20 can be welded to the inner plate 12 and the outer plate 13 by arc welding or other methods. Compared to the screw fixing method of the sealing cover 20 in the above-mentioned embodiment, this embodiment eliminates the steps of machining the fixing holes 33 and the screw holes 32, thereby reducing machining difficulty and cost.

[0057] A fourth embodiment of the present invention provides an axial flux motor, comprising the heat dissipation housing described in the above technical solution.

[0058] 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.

[0059] 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 concept 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. A heat dissipation housing, characterized in that: include: a housing, the housing comprising a bottom plate, an inner plate provided at an inner edge of the bottom plate, and an outer plate provided at an outer edge of the bottom plate, a stator cavity for arranging a stator being formed between the inner plate and the outer plate, a cooling channel being formed in a recessed manner on a side of the bottom plate facing the stator cavity, and a liquid inlet and a liquid outlet being provided on the outer plate for communicating with the cooling channel; a sealing cover, one side of which seals the cooling channel and the other side of which contacts the stator; The rigidity of the shell is greater than that of the sealing cover, and the thermal conductivity of the sealing cover is greater than that of the shell.

2. The heat dissipation housing according to claim 1, characterized in that: The shell is made of cast iron or steel, and the sealing cover is made of aluminum or copper.

3. The heat dissipation housing according to claim 1, wherein: The annular array in the cooling channel is provided with a plurality of fixing platforms for mounting the stator, and the sealing cover is provided with openings that cooperate with the fixing platforms.

4. The heat dissipation housing according to claim 3, characterized in that: A first groove is provided on the outer wall of the fixing platform, and a first O-ring is provided in the first groove. The first O-ring is radially sealed and fitted between the inner wall of the opening and the fixing platform.

5. The heat dissipation housing according to claim 3 or 4, characterized in that: A supporting platform for receiving the sealing cover is provided on the periphery of the fixing platform, and a second groove surrounding the fixing platform is provided on the supporting platform. A second O-ring or structural adhesive is provided in the second groove, and the second O-ring or the structural adhesive is axially sealed between the sealing cover and the supporting platform.

6. The heat dissipation housing according to claim 1, characterized in that: The base plate has a mounting plane surrounding the inner and outer sides of the cooling channel. The mounting plane has a plurality of screw holes in a circular array. The sealing cover is provided with fixing holes aligned with the screw holes. The fixing holes are used for screws to penetrate and cooperate with the screw holes, thereby enabling the sealing cover to close the cooling channel.

7. The heat dissipation housing according to claim 6, characterized in that: An annular groove is provided on the installation plane, and structural adhesive or a sealing ring is provided in the annular groove.

8. The heat dissipation housing according to claim 1, characterized in that: The inner edge of the sealing cover is welded and fixed to the inner plate, and the outer edge of the sealing cover is welded and fixed to the outer plate.

9. The heat dissipation housing according to claim 1, characterized in that: A baffle connecting the inner plate and the outer plate is provided in the cooling channel, the liquid inlet is connected to the cooling channel on the left side of the baffle, and the liquid outlet is connected to the cooling channel on the right side of the baffle.

10. The heat dissipation housing according to claim 9, characterized in that: A spoiler assembly is provided in the cooling channel, and the spoiler assembly includes a plurality of inner spoiler ribs and a plurality of outer spoiler ribs. The plurality of inner spoiler ribs are arranged in a ring array in the cooling channel, and one end extends to the inner plate. The outer spoiler ribs are arranged in a ring array in the cooling channel, and one end extends to the outer plate. The inner spoiler ribs and the outer spoiler ribs are staggered.

11. The heat dissipation housing according to claim 10, characterized in that: The end of the outer spoiler rib adjacent to the liquid inlet extends toward the baffle platform to form a first drainage rib, and the end of the outer spoiler rib adjacent to the liquid outlet extends toward the baffle platform to form a second drainage rib.

12. An axial flux motor, characterized in that: The heat dissipation housing comprises the heat dissipation housing according to any one of claims 1 to 11.

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