Axial flux motor with cooling structure

Abstract

The invention provides an axial magnetic flux motor with a cooling structure, which comprises two shells, two support bearings and a motor shaft, and is characterized in that the motor shaft is coaxially and rotatably connected to the interiors of the two shells through the two support bearings, and the two shells are fixedly connected through bolts; a heat dissipation assembly is installed in the shell. Under the driving of the circulating pump, cooling liquid can circularly flow among the heat exchange pipe, the heat dissipation box and the connecting pipe, when the cooling liquid is pumped into the heat exchange pipe, heat generated in the working process of the stator iron core can be absorbed, so that the working temperature of the stator iron core is remarkably reduced, and through circulating heat dissipation in the mode, the cooling efficiency is improved. According to the axial magnetic flux motor, continuous and stable heat dissipation of the stator iron core is achieved, the operation efficiency and stability of the whole axial magnetic flux motor are guaranteed, and meanwhile the liquid cooling heat dissipation mode has higher heat dissipation efficiency compared with a traditional air cooling heat dissipation mode.

Description

Technical Field

[0001] The present invention relates to an axial flux motor, in particular to an axial flux motor with a cooling structure, and belongs to the technical field of axial flux motors. Background Art

[0002] Axial flux motors, also known as "disc motors," are unique electric motors characterized by an axial rather than radial magnetic flux direction. The magnetic flux in an axial flux motor is oriented along the motor's axis, aligned with the rotor shaft. The stator and rotor cores are disc-shaped, with the current-carrying conductors positioned radially. This design results in a compact axial motor with a small radial dimension.

[0003] Axial flux motors with dual stators and a single rotor exhibit excellent symmetry, resulting in relatively low unilateral magnetic pull, which reduces vibration and noise and improves motor stability. Furthermore, because the effective magnetic surface area of ​​axial flux motors is located on the rotor surface rather than the outer diameter, they typically provide greater torque within a given volume, thereby increasing power density. The dual stator, single rotor structure further enhances this advantage, enabling the motor to output higher power within the same volume.

[0004] During operation, the stator of an axial flux motor with a dual-stator and single-rotor structure generates heat mainly due to the following reasons: Electromagnetic loss: When the motor is running, the current in the stator generates a magnetic field. This magnetic field interacts with the permanent magnets in the rotor, generating electromagnetic force to drive the motor to rotate. In this process, due to the existence of electromagnetic induction and magnetic resistance, certain electromagnetic losses will be generated. These losses will eventually be converted into heat energy, causing the stator to heat up; Core loss: The stator core will experience hysteresis and eddy current losses under the action of the alternating magnetic field. Hysteresis loss is caused by the hysteresis effect during the magnetization process of the core, while eddy current loss is caused by the eddy current induced in the core by the alternating magnetic field. These losses will also be converted into heat energy, causing the stator to heat up. Winding loss: The current in the stator winding will generate resistance loss during the flow process. These losses will also be converted into heat energy, causing the stator to heat up. Especially under high load or high speed operation, the winding loss will be more significant; In the prior art, a cooling fan is generally used as the main means of heat dissipation for the motor. However, this cooling method is not ideal for the heat dissipation of the stator and has limitations. This is because the cooling fan mainly removes the heat generated by the motor through air convection, but this method often has a poor heat dissipation effect in the stator area because the internal structure of the stator is complex and the heat is not easy to dissipate. In addition, the airflow generated by the cooling fan may not be able to fully cover every corner of the stator. For this reason, an axial flux motor with a cooling structure is proposed. Summary of the Invention

[0005] In view of this, the present invention provides an axial flux motor with a cooling structure to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0006] The technical solution of the embodiment of the present invention is achieved as follows: an axial flux motor with a cooling structure includes two housings, two support bearings and a motor shaft, wherein the motor shaft is coaxially rotatably connected to the interior of the two housings through the two support bearings, and the two housings are fixedly connected by bolts; A heat dissipation assembly is installed inside the shell, and the heat dissipation assembly includes a heat exchange pipe, a connecting pipe, a heat dissipation box, a circulation pump, an inner partition, two stator cores, a heat exchange tank, a shell and a bearing seat; The two stator cores are symmetrically fixedly connected to the interior of the two shells, the heat exchange groove is opened on the outer wall of the stator core, one end of the heat exchange tube is connected to the outlet of the circulation pump, and the other end of the heat exchange tube is connected to the heat dissipation box. The two heat dissipation boxes on adjacent surfaces are connected through the connecting pipe, and the heat dissipation box is connected to the inlet of the circulation pump. The inner partition is fixedly connected to the inner wall of the heat dissipation box, and the two support bearings are both installed on the outer wall of the motor shaft. The bearing seat is fixedly connected to the inner wall of the shell, and the outer wall of the heat dissipation box is symmetrically fixedly connected with heat sinks.

[0007] Further preferably, the heat dissipation assembly further includes a groove, an exhaust hole, a heat conducting ring, a heat conducting sheet and a heat conducting seat; The groove is opened inside the bearing seat, the exhaust holes are evenly opened on the outer wall of the shell, the heat conducting plate is evenly fixedly connected to the outer wall of the heat conducting ring, the heat conducting seat is fixedly connected to the inner wall of the heat conducting ring, and the position of the exhaust holes corresponds to the position of the heat conducting plate.

[0008] Further preferably, the heat-conducting seat is located inside the groove, the heat-conducting ring is sleeved on the outer wall of the bearing seat, and the support bearing is installed inside the bearing seat and fits with the heat-conducting seat.

[0009] Further preferably, the outer side wall of the heat exchange tube is attached to the inner side wall of the heat exchange tank, and the heat dissipation box and the circulation pump are installed on the outer side wall of the shell.

[0010] Further preferably, air inlet holes are uniformly opened on the outer wall of the shell, a rotor disk is installed on the outer wall of the motor shaft, and magnets are uniformly fixedly connected to the outer wall of the rotor disk.

[0011] Further preferably, the rotor disk is located between the two stator cores, a stator winding is wound inside the stator core, and the air inlet is located between the rotor disk and the stator core.

[0012] Further preferably, a baffle is fixedly connected to the outer side wall of the shell, and a heat exchange hole and a through groove are opened inside the baffle.

[0013] Further preferably, a guide assembly is provided on the outside of the motor shaft, and the guide assembly includes two electromagnets, an adsorption disk, a guide vane, a rotating seat, a spring, a connecting disk, a friction disk and a guide column; The two electromagnets are symmetrically fixedly connected to the two far-away surfaces of the shells, one end of the guide column is fixedly connected to the adsorption plate, the other end of the guide column is fixedly connected to the friction plate, the spring is sleeved on the outer wall of the guide column, the rotating seat is rotatably connected to the outer wall of the motor shaft, the connecting plate is fixedly connected to the outer wall of the motor shaft, and the guide vanes are evenly fixedly connected to the outer wall of the rotating seat.

[0014] Further preferably, the adsorption disk is adsorbed on the outer side wall of the electromagnet by magnetic force, one end of the spring presses against the friction disk, and the other end of the spring presses against the rotating seat.

[0015] Further preferably, the position of the guide vane corresponds to the position of the exhaust hole and the position of the through groove, the position of the heat dissipation box corresponds to the position of the heat exchange hole, and the baffle is rotatably connected to the outer wall of the connecting plate.

[0016] The embodiment of the present invention adopts the above technical solution, which has the following advantages: 1. Driven by a circulating pump, the present invention enables the coolant to circulate between the heat exchange tube, the heat sink and the connecting pipe. When the coolant is pumped into the heat exchange tube, it can absorb the heat generated by the stator core during operation, thereby significantly reducing the operating temperature of the stator core. Then, the coolant that has absorbed the heat continues to flow and enters the heat sink. Since an inner partition is provided inside the heat sink, the heat sink can be divided into two independent but interconnected parts, which increases the flow path of the coolant, so that the coolant can more fully contact the inside of the box when flowing through the heat sink. Then, through the heat sink outside the heat sink, the heat in the coolant can be dissipated to the surrounding air, thereby keeping the temperature of the heat sink and the coolant at a low level. Through this type of circulating heat dissipation, not only is continuous and stable heat dissipation of the stator core achieved, but also the operating efficiency and stability of the entire axial flux motor are guaranteed. At the same time, this liquid cooling heat dissipation method has higher heat dissipation efficiency than traditional air cooling heat dissipation.

[0017] 2. The present invention can conduct away the heat generated by the support bearing during operation through the heat-conducting seat, and then the heat-conducting seat further transfers the received heat to the heat-conducting ring, and the heat-conducting ring transfers the heat to the heat-conducting sheet, which is in the shape of a heat dissipation fin. Finally, the heat is dissipated into the surrounding air by the heat-conducting sheet, thereby achieving effective heat dissipation of the support bearing. By dissipating the heat of the support bearing, it is ensured that the support bearing can operate stably at a lower temperature, thereby extending its service life and improving the reliability and durability of the entire axial flux motor.

[0018] 3. The present invention sets a guide component. When dissipating heat, the electromagnet is de-energized. At this time, under the push of the spring, the friction disk contacts the connecting disk, and the rotating seat drives the guide vane to rotate. The guide vane rotates at high speed, forming a negative pressure at the position of the exhaust hole. External air is continuously sucked into the motor through the air inlet hole, flows into the gap between the rotor and the stator, and then flows through the heat conducting plate and the exhaust hole, and finally discharged through the through slot. During the exhaust process, not only the heat inside the motor can be discharged to achieve heat dissipation of the rotor and stator, but also the heat dissipated by the support bearing can be discharged. At the same time, external air also flows from the heat exchange hole to between the baffle and the shell, and then is discharged from the through slot to discharge the heat dissipated by the coolant, thereby accelerating the heat dissipation of the coolant.

[0019] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 This is a structural diagram of an axial flux motor with a cooling structure according to the present invention; Figure 2 This is a schematic diagram of the installation position of the heat dissipation component of the present invention; Figure 3 It is a schematic diagram of the structural decomposition of the present invention; Figure 4 This is a structural diagram of the baffle of the present invention; Figure 5 This is a structural diagram of the housing of the present invention; Figure 6 This is a structural diagram of the heat exchange tube of the present invention; Figure 7 This is a schematic diagram of the connection between the inner partition and the heat dissipation box of the present invention; Figure 8 This is a structural diagram of the stator core of the present invention; Figure 9 This is a structural diagram of the connection between the flow guide assembly and the motor shaft of the present invention; Figure 10 This is a schematic diagram of the decomposition structure of the diversion component of the present invention; Figure 11 This is a schematic diagram of the connection between the heat conducting seat and the heat conducting ring of the present invention; Figure 12 This is a schematic diagram of the air flow path when the present invention is working.

[0022] Figure numerals: 101, heat dissipation assembly; 11, heat exchange tube; 12, connecting pipe; 13, heat dissipation box; 14, circulation pump; 15, heat sink; 16, inner partition; 17, stator core; 18, heat exchange groove; 20, shell; 21, bearing seat; 22, groove; 23, exhaust hole; 24, motor shaft; 25, support bearing; 26, heat conduction ring; 27, heat conduction plate; 28, heat conduction seat; 29, air inlet; 30, baffle; 31, heat exchange hole; 32, through groove; 33, stator winding; 34, rotor disk; 35, magnet; 501, guide assembly; 51, electromagnet; 52, adsorption disk; 53, guide vane; 54, rotating seat; 55, spring; 56, connecting disk; 57, friction disk; 58, guide column. DETAILED DESCRIPTION

[0023] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0024] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In the prior art, cooling fans are commonly used as the primary means of dissipating heat from the motor. However, this method is not ideal for dissipating heat from the stator and has limitations. This is because the cooling fan primarily removes heat generated by the motor through air convection, but this method often has poor heat dissipation effects in the stator area because the stator's internal structure is complex, making it difficult to dissipate heat, and the airflow generated by the cooling fan may not fully cover every corner of the stator. To do this, see Figures 1-12As shown, an embodiment of the present invention provides an axial flux motor with a cooling structure, comprising two housings 20, two support bearings 25, and a motor shaft 24. The motor shaft 24 is coaxially rotatably connected to the interior of the two housings 20 via the two support bearings 25. The two housings 20 are fixedly connected by bolts. A rotor disk 34 is mounted on the outer wall of the motor shaft 24. The motor shaft 24 and the rotor disk 34 are directly connected by fixing, so that the rotor of the axial flux motor can have a hollow structure. By designing the rotor of the axial flux motor as a hollow structure, the following advantages are achieved: Significant weight reduction: The hollow structure can significantly reduce the overall weight of the rotor by removing some of the material inside the rotor; Improved response efficiency: Since the moment of inertia is proportional to the rotor mass, the hollow structure of the rotor reduces the weight while also reducing the moment of inertia, thereby improving the motor's response speed and positioning accuracy, which is particularly important in applications that require frequent starts and stops. The rotor disk 34 is located between the two stator cores 17. The stator winding 33 is wound inside the stator core 17. The air inlet 29 is located between the rotor disk 34 and the stator core 17. The outer wall of the rotor disk 34 is evenly fixed with magnets 35. When the axial flux motor is in operation, the stator winding 33 is energized. At this time, magnetic fields are generated on both sides of the motor's rotor disk 34 and act on the magnet 35. The magnetic fields interact with the magnetic fields generated by the magnet 35 to generate torque, causing the rotor disk 34 of the axial flux motor to rotate. The rotor disk 34 drives the motor shaft 24, thereby achieving power output. A heat dissipation assembly 101 is installed inside the housing 20. The heat dissipation assembly 101 can achieve efficient heat dissipation of the axial flux motor by adopting liquid cooling; During the heat dissipation process, the coolant flows into the interior of the stator core 17 through the heat exchange tube 11, and then can take away the heat in the stator core 17, thereby achieving efficient heat dissipation. Compared with traditional air cooling, this method has higher heat dissipation efficiency, can effectively reduce the operating temperature of the motor, prevent the motor from overheating, and ensure stable operation of the motor; The heat dissipation assembly 101 includes a heat exchange tube 11, a connecting tube 12, a heat dissipation box 13, a circulation pump 14, an inner partition 16, two stator cores 17, a heat exchange tank 18, a housing 20 and a bearing seat 21; The two stator cores 17 are symmetrically fixedly connected to the interior of the two shells 20, and the heat exchange groove 18 is opened on the outer wall of the stator core 17. One end of the heat exchange tube 11 is connected to the outlet of the circulation pump 14, and the other end of the heat exchange tube 11 is connected to the heat dissipation box 13. The two adjacent heat dissipation boxes 13 are connected through the connecting pipe 12, and the heat dissipation box 13 is connected to the inlet of the circulation pump 14. Then, under the drive of the circulation pump 14, an efficient coolant circulation system can be formed, so that the coolant can circulate between the heat exchange tube 11, the heat dissipation box 13 and the connecting pipe 12. When the coolant is pumped into the heat exchange tube 11, it effectively absorbs the heat generated by the stator core 17 during operation through heat exchange, thereby significantly reducing the operating temperature of the stator core 17. Then, the coolant that has absorbed the heat continues to flow and enters the heat dissipation box 13. The heat dissipation box 13 dissipates the heat in the coolant. This process ensures that the coolant can maintain a low temperature during the circulation process, thereby maintaining an efficient heat dissipation effect on the stator core 17. This liquid cooling cycle mechanism not only achieves continuous and stable heat dissipation of the stator core 17, but also ensures the operating efficiency and stability of the entire axial flux motor. At the same time, liquid cooling has higher heat dissipation efficiency than traditional air cooling. The inner partition 16 is fixedly connected to the inner wall of the heat dissipation box 13, the two support bearings 25 are both installed on the outer wall of the motor shaft 24, the bearing seat 21 is fixedly connected to the inner wall of the shell 20, and the outer wall of the heat dissipation box 13 is symmetrically fixedly connected with the heat dissipation fins 15. By setting the inner partition 16, the heat dissipation box 13 can be divided into two independent but interconnected parts, which increases the flow path of the coolant and enables the coolant to more fully contact the inside of the box when flowing through the heat dissipation box 13, thereby increasing the heat exchange area with the heat dissipation box 13. The heat dissipation in the coolant can be dissipated into the surrounding air through the heat dissipation fins 15 outside the heat dissipation box 13, thereby keeping the temperature of the heat dissipation box 13 and the coolant at a low level.

[0026] In one embodiment, the heat dissipation assembly 101 further includes a groove 22, an exhaust hole 23, a heat conducting ring 26, a heat conducting sheet 27 and a heat conducting seat 28; The groove 22 is opened inside the bearing seat 21, the exhaust holes 23 are evenly opened on the outer wall of the shell 20, the heat conducting sheet 27 is evenly fixedly connected to the outer wall of the heat conducting ring 26, and the heat conducting seat 28 is fixedly connected to the inner wall of the heat conducting ring 26. The position of the exhaust hole 23 corresponds to the position of the heat conducting sheet 27. The support bearing 25 can be cooled by the heat conducting ring 26, the heat conducting sheet 27 and the heat conducting seat 28, and the heat of the support bearing 25 can be discharged through the exhaust hole 23.

[0027] In one embodiment, the thermal seat 28 is located inside the groove 22, the thermal ring 26 is sleeved on the outer wall of the bearing seat 21, and the support bearing 25 is installed inside the bearing seat 21 and fits with the thermal seat 28. The heat generated by the support bearing 25 during operation can be discharged through the thermal seat 28, and then the thermal seat 28 further transfers the received heat to the thermal ring 26. The thermal ring 26 transfers the heat to the thermal sheet 27, which is in the shape of a heat dissipation fin. Finally, the thermal sheet 27 dissipates the heat to the surrounding air, thereby achieving effective heat dissipation of the support bearing 25. By dissipating the heat of the support bearing 25, it is ensured that the support bearing 25 can operate stably at a lower temperature, thereby extending its service life and improving the reliability and durability of the entire axial flux motor.

[0028] In one embodiment, the outer wall of the heat exchange tube 11 is fitted to the inner wall of the heat exchange groove 18, the heat dissipation box 13 and the circulation pump 14 are installed on the outer wall of the shell 20, and the shapes of the heat exchange groove 18 and the heat exchange tube 11 are both flat spiral types, so that the heat exchange tube 11 can be tightly and firmly embedded in the heat exchange groove 18, and the contact area is maximized. When the coolant flows in the heat exchange tube 11, it can fully and evenly absorb the heat generated by the stator core 17 during operation, thereby achieving efficient heat exchange and cooling of the stator core 17.

[0029] In order to solve the problems existing in the prior art, an embodiment of the present invention provides an axial flux motor with a cooling structure, and solves the problems through the above technical solutions: Driven by the circulating pump 14, the coolant can circulate between the heat exchange tube 11, the heat dissipation box 13 and the connecting pipe 12. When the coolant is pumped into the heat exchange tube 11, it absorbs the heat generated by the stator core 17 during operation, thereby significantly reducing the operating temperature of the stator core 17. Then, the coolant that has absorbed the heat continues to flow and enters the heat dissipation box 13. Since an inner partition 16 is provided inside the heat dissipation box 13, the heat dissipation box 13 can be divided into two independent but interconnected parts, which increases the flow path of the coolant, so that the coolant can fully contact the inside of the box when flowing through the heat dissipation box 13. Then, through the heat sink 15 outside the heat dissipation box 13, the heat in the coolant can be dissipated to the surrounding air, thereby keeping the temperature of the heat dissipation box 13 and the coolant at a low level. Through this type of circulating heat dissipation, not only is the stator core 17 continuously and stably dissipated, but the operating efficiency and stability of the entire axial flux motor are also guaranteed. Compared with traditional air-cooled heat dissipation, it has higher heat dissipation efficiency.

[0030] In one embodiment, air inlet holes 29 are evenly opened on the outer wall of the shell 20, and the air inlet holes 29 can be used to guide the external air so that the external air flows into the shell 20 to achieve heat dissipation and cooling of the motor rotor and the motor stator.

[0031] In one embodiment, a baffle 30 is fixedly connected to the outer wall of the shell 20, and a heat exchange hole 31 and a through groove 32 are opened inside the baffle 30. The baffle 30 can play a role of sealing protection, and the heat exchange hole 31 and the through groove 32 can ensure the normal inflow and outflow of air.

[0032] In one embodiment, a guide assembly 501 is provided on the outside of the motor shaft 24. The guide assembly 501 is mainly used to guide air, directing external air into the internal space of the motor so that the air can fully contact the motor stator and motor rotor. When the external air is introduced into the motor by the guide assembly 501, it will be further guided by the guide assembly 501 and finally discharged to the outside of the motor, thereby maintaining the air flow and heat dissipation effect inside the motor. The guide assembly 501 includes two electromagnets 51, a suction plate 52, a guide vane 53, a rotating seat 54, a spring 55, a connecting plate 56, a friction plate 57 and a guide post 58; The two electromagnets 51 are symmetrically fixedly connected to the away surfaces of the two shells 20, one end of the guide column 58 is fixedly connected to the adsorption disk 52, and the other end of the guide column 58 is fixedly connected to the friction disk 57. The spring 55 is sleeved on the outer wall of the guide column 58, the rotating seat 54 is rotatably connected to the outer wall of the motor shaft 24, the connecting disk 56 is fixedly connected to the outer wall of the motor shaft 24, and the guide blades 53 are evenly fixedly connected to the outer wall of the rotating seat 54. The guide blades 53 are used to guide the air. When the motor shaft 24 rotates at high speed, the motor shaft 24 drives the guide blades 53 to guide the air.

[0033] In one embodiment, the adsorption disk 52 is adsorbed on the outer wall of the electromagnet 51 by magnetic force, one end of the spring 55 presses against the friction disk 57, and the other end of the spring 55 presses against the rotating seat 54. The position of the guide vane 53 corresponds to the position of the exhaust hole 23 and the position of the through slot 32, the position of the heat dissipation box 13 corresponds to the position of the heat exchange hole 31, and the baffle 30 is rotatably connected to the outer wall of the connecting disk 56. In the initial state, the electromagnet 51 uses its magnetic force to firmly adsorb and fix the adsorption disk 52, ensuring the stable structure of the entire heat dissipation system. At this time, a certain distance is maintained between the friction disk 57 and the connecting disk 56, and they are in a non-contact state. When the axial flux motor needs to dissipate heat, the electromagnet 51 will receive a power-off signal and then lose its magnetism. At this time, under the push of the spring 55, the friction disk 57 contacts the connecting disk 56. Since the connecting disk 56 is fixed on the motor shaft 24, When the friction disc 57 contacts the connecting disc 56, the rotational movement of the motor shaft 24 is directly transmitted to the friction disc 57 through the connecting disc 56. The rotation of the friction disc 57 is further driven by the transmission action of the guide column 58 to drive the rotating seat 54 to start rotating. The rotating seat 54 drives the guide vanes 53 to rotate. The guide vanes 53 rotate at a high speed, forming a negative pressure at the position of the exhaust hole 23. The fresh air from the outside is continuously sucked into the motor through the air inlet 29, flows into the gap between the rotor and the stator, and then flows through the heat conducting plate 27 and the exhaust hole 23, and is finally discharged through the through slot 32. In this process, not only the heat inside the motor can be discharged, realizing the heat dissipation of the rotor and stator, but also the heat dissipation of the support bearing 25 can be accelerated. At the same time, the external air also flows from the heat exchange hole 31 into the space between the baffle 30 and the housing 20, and is then discharged from the through slot 32, thereby accelerating the heat dissipation of the coolant. Through the above heat dissipation, not only the effective discharge of heat inside the motor is ensured, but also the comprehensive heat dissipation of the rotor, stator and support bearing 25 is achieved, while the heat dissipation efficiency of the coolant is improved, ensuring the continuous and stable operation of the axial flux motor.

[0034] In one embodiment, in order to accurately monitor the operating status of the axial flux motor and ensure safe and efficient operation, multiple temperature sensors are installed inside the motor to detect the operating temperature of the stator core 17 and the rotor disk 34, thereby achieving comprehensive monitoring of the temperature of key components inside the motor. When the operating temperature of the stator core 17 gradually rises due to long-term operation or excessive load and exceeds the preset rated value, the corresponding temperature sensor sends a signal to the motor control system. After receiving the signal, the motor control system immediately controls the circulation pump 14 to work; When the circulating pump 14 is started, the coolant can be circulated, thereby more effectively taking away the heat from the stator core 17, helping to reduce its temperature and prevent overheating; When the operating temperature of the rotor disk 34 exceeds its rated value, the temperature sensor at this location sends an alarm signal to the motor control system, which controls the electromagnet 51 to be de-energized. The de-energization of the electromagnet 51 will release its adsorption effect on the adsorption disk 52, and then, under the push of the spring 55, the guide assembly 501 is triggered to work, sucking in external air for heat dissipation, thereby effectively reducing the temperature of the rotor disk 34 and its surrounding components.

[0035] When the present invention is working: when it is necessary to dissipate heat for the axial flux motor, the circulating pump 14 starts working. Driven by the circulating pump 14, the coolant circulates between the heat exchange tube 11, the heat dissipation box 13 and the connecting pipe 12. When the coolant is pumped into the heat exchange tube 11, it absorbs the heat generated by the stator core 17 during operation, thereby reducing the operating temperature of the stator core 17. Then, the coolant that has absorbed the heat flows into the heat dissipation box 13. Under the action of the inner partition 16, the coolant can more fully contact the interior of the box body. Then, the heat in the coolant is dissipated to the surrounding air through the heat dissipation fins 15 outside the heat dissipation box 13, thereby keeping the temperature of the heat dissipation box 13 and the coolant at a low level. At the same time, the electromagnet 51 receives the power-off signal and loses its magnetism. At this time, the friction disc 57 is pushed by the spring 55 to contact the connecting disc 56. Since the connecting disc 56 is fixed on the motor shaft 24, when the friction disc 57 contacts the connecting disc 56, the rotation of the motor shaft 24 is directly transmitted to the friction disc 57 through the connecting disc 56. The rotation of the friction disc 57 is further driven by the transmission effect of the guide column 58 to drive the rotating seat 54 to start rotating. The rotating seat 54 drives the guide vane 53 to rotate. The guide vane 53 rotates at a high speed, forming a A negative pressure is formed, and the external air is continuously sucked into the motor through the air inlet 29, flows into the gap between the rotor and the stator, then flows through the heat conducting plate 27 and the exhaust hole 23, and finally is discharged through the through slot 32. During the exhaust process, not only the heat inside the motor can be discharged to achieve heat dissipation of the rotor and stator, but also the heat dissipated by the support bearing 25 can be discharged. At the same time, the external air also flows from the heat exchange hole 31 to between the baffle 30 and the shell 20, and then is discharged from the through slot 32 to discharge the heat dissipated by the coolant, thereby accelerating the heat dissipation of the coolant.

[0036] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications and substitutions within the technical scope disclosed in the present invention, and such modifications and substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. An axial flux motor with a cooling structure, comprising two housings (20), two support bearings (25) and a motor shaft (24), characterized in that: The motor shaft (24) is coaxially rotatably connected to the inside of the two housings (20) via the two support bearings (25), and the two housings (20) are fixedly connected via bolts; A heat dissipation assembly (101) is installed inside the housing (20), and the heat dissipation assembly (101) comprises a heat exchange tube (11), a connecting tube (12), a heat dissipation box (13), a circulating pump (14), an inner partition (16), two stator cores (17), a heat exchange groove (18), a housing (20), and a bearing seat (21); The two stator cores (17) are symmetrically fixedly connected to the inside of the two shells (20); the heat exchange groove (18) is opened on the outer wall of the stator core (17); one end of the heat exchange tube (11) is connected to the outlet of the circulation pump (14); the other end of the heat exchange tube (11) is connected to the heat dissipation box (13); the two heat dissipation boxes (13) on adjacent surfaces are connected through the connecting tube (12); the heat dissipation box (13) is connected to the inlet of the circulation pump (14); the inner partition (16) is fixedly connected to the inner wall of the heat dissipation box (13); the two support bearings (25) are both installed on the outer wall of the motor shaft (24); the bearing seat (21) is fixedly connected to the inner wall of the shell (20); and the outer wall of the heat dissipation box (13) is symmetrically fixedly connected with heat sinks (15).

2. The axial flux motor with a cooling structure according to claim 1, characterized in that: The heat dissipation assembly (101) further comprises a groove (22), an exhaust hole (23), a heat-conducting ring (26), a heat-conducting sheet (27) and a heat-conducting seat (28); The groove (22) is formed inside the bearing seat (21), the exhaust hole (23) is uniformly formed on the outer wall of the shell (20), the heat conducting sheet (27) is uniformly fixedly connected to the outer wall of the heat conducting ring (26), the heat conducting seat (28) is fixedly connected to the inner wall of the heat conducting ring (26), and the position of the exhaust hole (23) corresponds to the position of the heat conducting sheet (27).

3. The axial flux motor with a cooling structure according to claim 2, characterized in that: The heat-conducting seat (28) is located inside the groove (22), the heat-conducting ring (26) is sleeved on the outer wall of the bearing seat (21), and the support bearing (25) is installed inside the bearing seat (21) and fits with the heat-conducting seat (28).

4. The axial flux motor with a cooling structure according to claim 3, characterized in that: The outer wall of the heat exchange tube (11) is attached to the inner wall of the heat exchange groove (18), and the heat dissipation box (13) and the circulation pump (14) are installed on the outer wall of the shell (20).

5. The axial flux motor with a cooling structure according to claim 4, characterized in that: The outer wall of the housing (20) is uniformly provided with air inlet holes (29), the outer wall of the motor shaft (24) is mounted with a rotor disk (34), and the outer wall of the rotor disk (34) is uniformly fixedly connected with magnetic steel (35).

6. The axial flux motor with a cooling structure according to claim 5, characterized in that: The rotor disk (34) is located between the two stator cores (17), a stator winding (33) is wound inside the stator core (17), and the air inlet (29) is located between the rotor disk (34) and the stator core (17).

7. The axial flux motor with a cooling structure according to claim 5, characterized in that: A baffle (30) is fixedly connected to the outer wall of the shell (20), and a heat exchange hole (31) and a through groove (32) are provided inside the baffle (30).

8. The axial flux motor with a cooling structure according to claim 7, characterized in that: A flow guide assembly (501) is disposed outside the motor shaft (24), and the flow guide assembly (501) comprises two electromagnets (51), a suction plate (52), a flow guide vane (53), a rotating seat (54), a spring (55), a connecting plate (56), a friction plate (57) and a guide column (58); The two electromagnets (51) are symmetrically fixedly connected to the two faces of the housing (20) that are far away from each other, one end of the guide column (58) is fixedly connected to the adsorption disk (52), the other end of the guide column (58) is fixedly connected to the friction disk (57), the spring (55) is sleeved on the outer wall of the guide column (58), the rotating seat (54) is rotatably connected to the outer wall of the motor shaft (24), the connecting disk (56) is fixedly connected to the outer wall of the motor shaft (24), and the guide vanes (53) are evenly fixedly connected to the outer wall of the rotating seat (54).

9. The axial flux motor with a cooling structure according to claim 8, characterized in that: The adsorption disk (52) is adsorbed to the outer wall of the electromagnet (51) by magnetic force, one end of the spring (55) presses against the friction disk (57), and the other end of the spring (55) presses against the rotating seat (54).

10. The axial flux motor with a cooling structure according to claim 8, characterized in that: The position of the guide vane (53) corresponds to the position of the exhaust hole (23) and the position of the through groove (32), the position of the heat dissipation box (13) corresponds to the position of the heat exchange hole (31), and the baffle (30) is rotatably connected to the outer wall of the connection plate (56).

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