An axial flux motor with a cooling structure

Abstract

The present invention provides an axial flux motor with a cooling structure, which includes two housings, two support bearings and a motor shaft. The motor shaft is coaxially rotatably connected to the inside of the two housings through the two support bearings, and the two housings are fixedly connected by bolts; a heat dissipation component is installed inside the housing. Driven by the circulation pump in the present invention, the coolant can circulate between the heat exchange tubes, the heat dissipation box and the connecting pipes. When the coolant is pumped into the heat exchange tubes, it can absorb the heat generated by the stator core during operation, thereby significantly reducing the working temperature of the stator core. Through this cyclic heat dissipation method, not only the continuous and stable heat dissipation of the stator core is achieved, but also the operation efficiency and stability of the entire axial flux motor are ensured. At the same time, this liquid cooling heat dissipation method has a higher heat dissipation efficiency compared with the traditional air cooling heat dissipation.

Description

Technical Field

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

[0002] An axial-flux motor, also known as a "disc motor", is a unique electric motor. Its main characteristic is that the direction of its magnetic flux is axial, rather than the traditional radial direction. The magnetic flux direction of the axial-flux motor is along the axis of the motor, that is, consistent with the direction of the rotating shaft. The stator and rotor cores are of a disc structure, and the current-carrying conductors are placed radially. This structure makes the motor relatively compact in the axial dimension and has a smaller radial dimension.

[0003] The axial-flux motor with a double-stator single-rotor structure has good symmetry, making the unilateral magnetic pull relatively small, thereby reducing vibration and noise and improving the operating stability of the motor. Moreover, since the effective magnetic surface area of the axial-flux motor is located on the surface of the motor rotor rather than the outer diameter, it can usually provide a larger torque within a certain volume, thereby increasing the power density. The double-stator single-rotor structure further enhances this advantage, enabling the motor to output higher power under the same volume.

[0004] During the working process, the reasons for the stator of the axial-flux motor with a double-stator single-rotor structure to generate heat are mainly as follows:

[0005] Electromagnetic loss: When the motor is running, the current in the stator generates a magnetic field, which interacts with the permanent magnets in the rotor to generate an 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, and these losses will ultimately be converted into heat energy, resulting in the stator heating up;

[0006] Core loss: The stator core will generate hysteresis and eddy current losses under the action of an alternating magnetic field. Hysteresis loss is generated due to the hysteresis effect during the magnetization process of the core, and eddy current loss is generated due to the induction of eddy currents in the core by the alternating magnetic field. These losses will also be converted into heat energy, causing the stator to heat up;

[0007] Winding loss: The current in the stator winding will generate resistance loss during the flowing process, and these losses will also be converted into heat energy, making the stator heat up. Especially under high load or high-speed operation conditions, the winding loss will be more significant;

[0008] In the prior art, a cooling fan is generally adopted as the main means for motor cooling. However, this cooling method has unsatisfactory cooling effect on the stator and has limitations. This is because the cooling fan mainly removes the heat generated by the motor through air convection. However, this method often has poor cooling effect in the stator area because the internal structure of the stator is complex, the heat is not easily dissipated, and the airflow generated by the cooling fan may not fully cover all corners of the stator. Therefore, an axial flux motor with a cooling structure is proposed. Summary of the Invention

[0009] 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.

[0010] The technical solution of the embodiment of the present invention is implemented as follows: An axial flux motor with a cooling structure includes two housings, two support bearings and a motor shaft. The motor shaft is coaxially rotatably connected to the inside of the two housings through the two support bearings, and the two housings are fixedly connected by bolts;

[0011] A heat dissipation component is installed inside the housing. The heat dissipation component includes a heat exchange tube, a connecting tube, a heat dissipation box, a circulation pump, an inner partition, two stator cores, a heat exchange groove, a housing and a bearing seat;

[0012] The two stator cores are symmetrically and fixedly connected to the inside of the two housings. The heat exchange groove is opened on the outer side wall of the stator core. One end of the heat exchange tube is communicated with the outlet of the circulation pump, and the other end of the heat exchange tube is communicated with the heat dissipation box. The two adjacent heat dissipation boxes are communicated through the connecting tube. The heat dissipation box is communicated with the inlet of the circulation pump. The inner partition is fixedly connected to the inner side wall of the heat dissipation box. The two support bearings are both installed on the outer side wall of the motor shaft. The bearing seat is fixedly connected to the inner side wall of the housing. Heat dissipation fins are symmetrically and fixedly connected to the outer side wall of the heat dissipation box.

[0013] Further preferably, the heat dissipation component further includes a groove, an exhaust hole, a heat conduction ring, a heat conduction sheet and a heat conduction seat;

[0014] The groove is opened inside the bearing seat. The exhaust holes are evenly opened on the outer side wall of the housing. The heat conduction sheets are evenly and fixedly connected to the outer side wall of the heat conduction ring. The heat conduction seat is fixedly connected to the inner side wall of the heat conduction ring. The positions of the exhaust holes correspond to the positions of the heat conduction sheets.

[0015] Further preferably, the heat conduction seat is located inside the groove. The heat conduction ring is sleeved on the outer side wall of the bearing seat. The support bearing is installed inside the bearing seat and is in contact with the heat conduction seat.

[0016] Further preferably, the outer sidewall of the heat exchange tube is attached to the inner sidewall of the heat exchange groove, and the heat dissipation box and the circulation pump are installed on the outer sidewall of the housing.

[0017] Further preferably, the outer sidewall of the housing is evenly provided with air inlet holes, a rotor disc is installed on the outer sidewall of the motor shaft, and magnetic steel is evenly fixedly connected to the outer sidewall of the rotor disc.

[0018] Further preferably, the rotor disc is located between the two stator cores, a stator winding is wound inside the stator core, and the air inlet holes are located between the rotor disc and the stator core.

[0019] Further preferably, a baffle is fixedly connected to the outer sidewall of the housing, and a heat exchange hole and a through groove are formed inside the baffle.

[0020] Further preferably, a flow guiding assembly is arranged outside the motor shaft, and the flow guiding assembly includes two electromagnets, an adsorption disc, flow guiding blades, a rotating seat, a spring, a connecting disc, a friction disc and a guiding column;

[0021] The two electromagnets are symmetrically and fixedly connected to the opposite surfaces of the two housings, one end of the guiding column is fixedly connected to the adsorption disc, the other end of the guiding column is fixedly connected to the friction disc, the spring is sleeved on the outer sidewall of the guiding column, the rotating seat is rotatably connected to the outer sidewall of the motor shaft, the connecting disc is fixedly connected to the outer sidewall of the motor shaft, and the flow guiding blades are evenly fixedly connected to the outer sidewall of the rotating seat.

[0022] Further preferably, the adsorption disc is magnetically adsorbed on the outer sidewall of the electromagnet, one end of the spring abuts against the friction disc, and the other end of the spring abuts against the rotating seat.

[0023] Further preferably, the positions of the flow guiding blades correspond to the positions of the exhaust holes and the through grooves, the position of the heat dissipation box corresponds to the position of the heat exchange holes, and the baffle is rotatably connected to the outer sidewall of the connecting disc.

[0024] Due to the adoption of the above technical solutions in the embodiments of the present invention, the following advantages are achieved:

[0025] 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 tube. 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, increasing 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 the 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-cooled heat dissipation method has higher heat dissipation efficiency than traditional air-cooled heat dissipation.

[0026] 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.

[0027] 3. The present invention sets a guide component. When heat is dissipated, the electromagnet is powered off. 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. The 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 conductive plate and the exhaust hole, and is finally discharged through the through groove. During the exhaust process, not only the heat inside the motor can be discharged to achieve heat dissipation of the rotor and the stator, but also the heat dissipated by the support bearing can be discharged. At the same time, the external air also flows from the heat exchange hole to between the baffle and the shell, and then is discharged from the through groove to discharge the heat dissipated by the coolant, thereby accelerating the heat dissipation of the coolant.

[0028] 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

[0029] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 Structural diagram of an axial flux motor with a cooling structure according to the present invention;

[0031] Figure 2 Schematic diagram of the installation position of the heat dissipation component according to the present invention;

[0032] Figure 3 Exploded view of the structure according to the present invention;

[0033] Figure 4 Structural diagram of the baffle according to the present invention;

[0034] Figure 5 Structural diagram of the housing according to the present invention;

[0035] Figure 6 Structural diagram of the heat exchange tube according to the present invention;

[0036] Figure 7 Schematic diagram of the connection between the inner partition and the heat dissipation box according to the present invention;

[0037] Figure 8 Structural diagram of the stator core according to the present invention;

[0038] Figure 9 Structural diagram of the connection between the flow guiding component and the motor shaft according to the present invention;

[0039] Figure 10 Exploded view of the structure of the flow guiding component according to the present invention;

[0040] Figure 11 Schematic diagram of the connection between the heat conducting seat and the heat conducting ring according to the present invention;

[0041] Figure 12 Schematic diagram of the air flow path during the operation of the present invention.

[0042] Reference numerals: 101, heat dissipation component; 11, heat exchange tube; 12, connecting tube; 13, heat dissipation box; 14, circulation pump; 15, heat sink; 16, inner partition; 17, stator core; 18, heat exchange groove; 20, housing; 21, bearing seat; 22, groove; 23, exhaust hole; 24, motor shaft; 25, support bearing; 26, heat conduction ring; 27, heat conduction sheet; 28, heat conduction seat; 29, air inlet hole; 30, baffle; 31, heat exchange hole; 32, through groove; 33, stator winding; 34, rotor disc; 35, magnet; 501, flow guiding component; 51, electromagnet; 52, adsorption disc; 53, flow guiding vane; 54, rotating seat; 55, spring; 56, connecting disc; 57, friction disc; 58, guiding column. Detailed implementation manners

[0043] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature and not restrictive.

[0044] The embodiments of the present invention will be described in detail below with reference to the drawings.

[0045] In the prior art, a cooling fan is generally used as the main means for cooling the motor. However, this cooling method has an unsatisfactory cooling effect on the stator and has limitations. This is because the cooling fan mainly dissipates the heat generated by the motor through air convection. However, this method often has a poor cooling effect in the stator area because the internal structure of the stator is complex and the heat is not easily dissipated, and the airflow generated by the cooling fan may not fully cover all corners of the stator.

[0046] For this reason, please refer to Figures 1-12 As shown in the figure, an axial flux motor with a cooling structure provided by an embodiment of the present invention includes two housings 20, two support bearings 25, and a motor shaft 24. The motor shaft 24 is coaxially rotatably connected to the inside of the two housings 20 through the two support bearings 25. The two housings 20 are fixedly connected by bolts. A rotor disc 34 is installed on the outer sidewall of the motor shaft 24. The motor shaft 24 and the rotor disc 34 are directly connected by fixation. Thus, the rotor of the axial flux motor can have a hollow structure.

[0047] By designing the rotor of the axial flux motor as a hollow structure, the following advantages are achieved:

[0048] Significantly reduce weight: The hollow structure can greatly reduce the overall weight of the rotor by removing some materials inside the rotor.

[0049] Improve response efficiency: Since the moment of inertia is proportional to the mass of the rotor, the hollow-structured rotor reduces the moment of inertia while reducing the weight, thereby improving the response speed and positioning accuracy of the motor. This is particularly important for applications that require frequent start and stop;

[0050] The rotor disk 34 is located between two stator cores 17. The stator winding 33 is wound inside the stator core 17. The air inlet hole 29 is located between the rotor disk 34 and the stator core 17. The outer side wall of the rotor disk 34 is evenly fixedly connected with permanent magnets 35;

[0051] When the axial flux motor is working, the stator winding 33 is energized. At this time, magnetic fields are generated on both sides of the rotor disk 34 of the motor and act on the permanent magnets 35. The magnetic fields interact with the magnetic fields generated by the permanent magnets 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, and thus the output of power can be achieved;

[0052] A heat dissipation component 101 is installed inside the housing 20. By adopting the liquid cooling heat dissipation method, the heat dissipation component 101 can efficiently dissipate heat from the axial flux motor;

[0053] During the heat dissipation process, the coolant flows into and through the inside of the stator core 17 through the heat exchange tube 11, and thus the heat inside the stator core 17 can be taken away, thereby achieving efficient heat dissipation. This method has a higher heat dissipation efficiency compared to the traditional air cooling heat dissipation, can effectively reduce the working temperature of the motor, prevent the motor from overheating, and ensure the stable operation of the motor;

[0054] The heat dissipation component 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 groove 18, a housing 20, and a bearing seat 21;

[0055] Two stator cores 17 are symmetrically and fixedly connected to the interiors of two housings 20. A heat exchange groove 18 is formed on the outer sidewall of the stator core 17. One end of a heat exchange tube 11 is communicated with the outlet of a circulation pump 14, and the other end of the heat exchange tube 11 is communicated with a heat dissipation box 13. Two adjacent heat dissipation boxes 13 are communicated with each other through a connecting tube 12. The heat dissipation box 13 is communicated with the inlet of the circulation pump 14. Thus, driven by the circulation pump 14, an efficient coolant circulation system can be formed, enabling the coolant to circulate between the heat exchange tube 11, the heat dissipation box 13, and the connecting tube 12. When the coolant is pumped into the interior of 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. Thus, this process ensures that the coolant can continuously maintain a relatively low temperature during circulation, thereby maintaining an efficient heat dissipation effect on the stator core 17;

[0056] Through such a liquid cooling circulation mechanism, not only is continuous and stable heat dissipation of the stator core 17 achieved, but also the operating efficiency and stability of the entire axial flux motor are ensured. At the same time, the liquid cooling heat dissipation method has a higher heat dissipation efficiency compared to the traditional air cooling heat dissipation;

[0057] An inner partition 16 is fixedly connected to the inner sidewall of the heat dissipation box 13. Two support bearings 25 are both installed on the outer sidewall of the motor shaft 24. A bearing seat 21 is fixedly connected to the inner sidewall of the housing 20. Heat dissipation fins 15 are symmetrically and fixedly connected to the outer sidewall of the heat dissipation box 13. By providing the inner partition 16, the heat dissipation box 13 can be divided into two independent but interconnected parts, increasing the flow path of the coolant and also enabling the coolant to more fully contact the interior of the box body when flowing through the heat dissipation box 13, increasing the heat exchange area with the heat dissipation box 13. And through the heat dissipation fins 15 outside the heat dissipation box 13, the heat in the coolant can be dissipated into the surrounding air, thereby keeping the temperature of the heat dissipation box 13 and the coolant at a relatively low level.

[0058] In one embodiment, the heat dissipation assembly 101 further includes a groove 22, exhaust holes 23, a heat conducting ring 26, heat conducting sheets 27, and a heat conducting seat 28;

[0059] The groove 22 is formed in the interior of the bearing seat 21. The exhaust holes 23 are uniformly formed in the outer sidewall of the housing 20. The heat conducting sheets 27 are uniformly fixedly connected to the outer sidewall of the heat conducting ring 26. The heat conducting seat 28 is fixedly connected to the inner sidewall of the heat conducting ring 26. The positions of the exhaust holes 23 correspond to the positions of the heat conducting sheets 27. The support bearing 25 can be cooled through the heat conducting ring 26, the heat conducting sheets 27, and the heat conducting seat 28, and the heat of the support bearing 25 can be discharged through the exhaust holes 23.

[0060] In one embodiment, the heat conducting base 28 is located inside the groove 22, the heat conducting ring 26 is sleeved on the outer side wall of the bearing housing 21, the support bearing 25 is installed inside the bearing housing 21 and is in contact with the heat conducting base 28. The heat generated by the support bearing 25 during operation can be conducted out through the heat conducting base 28. Then, the heat conducting base 28 further transfers the received heat to the heat conducting ring 26, and the heat conducting ring 26 transfers the heat to the heat conducting fin 27. The heat conducting fin 27 is in the shape of a heat dissipation fin. Finally, the heat conducting fin 27 dissipates the heat into the surrounding air, achieving effective heat dissipation for the support bearing 25. By dissipating heat from the support bearing 25, it is ensured that the support bearing 25 can operate stably at a lower temperature, extending its service life and improving the reliability and durability of the entire axial flux motor.

[0061] In one embodiment, the outer side wall of the heat exchange tube 11 is in contact with the inner side wall of the heat exchange groove 18. The heat dissipation box 13 and the circulation pump 14 are installed on the outer side wall of the housing 20. The shapes of both the heat exchange groove 18 and the heat exchange tube 11 are planar spiral, so that the heat exchange tube 11 can be tightly and stably embedded in the heat exchange groove 18, and the contact area is maximally increased. When the coolant flows inside the heat exchange tube 11, it can fully and evenly absorb the heat generated by the stator core 17 during operation, thus achieving efficient heat exchange and cooling for the stator core 17.

[0062] To solve the problems existing in the prior art, the embodiment of the present invention provides an axial flux motor with a cooling structure and solves the problems through the above technical solutions:

[0063] Driven by the circulation 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, thus significantly reducing the working 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 the 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, increasing the flow path of the coolant, enabling the coolant to fully contact the inside of the box body when flowing through the heat dissipation box 13. Then, through the heat dissipation fins 15 outside the heat dissipation box 13, the heat in the coolant can be dissipated into the surrounding air, thereby keeping the temperature of the heat dissipation box 13 and the coolant at a lower level. Through this cyclic heat dissipation method, not only continuous and stable heat dissipation for the stator core 17 is achieved, but also the operation efficiency and stability of the entire axial flux motor are ensured, and it has a higher heat dissipation efficiency compared with traditional air-cooled heat dissipation.

[0064] In one embodiment, air intake holes 29 are evenly formed in the outer sidewall of the housing 20. Through the air intake holes 29, the external air can be guided, so that the external air flows into the housing 20 to achieve heat dissipation and temperature reduction of the motor rotor and the motor stator.

[0065] In one embodiment, a baffle 30 is fixedly connected to the outer sidewall of the housing 20. Heat exchange holes 31 and through grooves 32 are formed in the baffle 30. The baffle 30 can play a role in closing and protecting, and the normal inflow and outflow of air can be ensured through the heat exchange holes 31 and the through grooves 32.

[0066] In one embodiment, a flow guiding assembly 501 is arranged outside the motor shaft 24. The flow guiding assembly 501 is mainly used to guide the air flow, guide the external air into the internal space of the motor, so that the air can fully contact the motor stator and the motor rotor. When the external air is introduced into the motor by the flow guiding assembly 501, it will be further guided by the flow guiding assembly 501 and finally discharged to the outside of the motor, so as to maintain the air circulation and heat dissipation effect inside the motor;

[0067] The flow guiding assembly 501 includes two electromagnets 51, an adsorption disc 52, flow guiding vanes 53, a rotating seat 54, a spring 55, a connecting disc 56, a friction disc 57 and a guiding column 58;

[0068] The two electromagnets 51 are symmetrically and fixedly connected to the opposite surfaces of the two housings 20. One end of the guiding column 58 is fixedly connected to the adsorption disc 52, and the other end of the guiding column 58 is fixedly connected to the friction disc 57. The spring 55 is sleeved on the outer sidewall of the guiding column 58. The rotating seat 54 is rotatably connected to the outer sidewall of the motor shaft 24. The connecting disc 56 is fixedly connected to the outer sidewall of the motor shaft 24. The flow guiding vanes 53 are evenly and fixedly connected to the outer sidewall of the rotating seat 54. The flow guiding vanes 53 are used to guide the air flow. When the motor shaft 24 rotates at a high speed, the motor shaft 24 drives the flow guiding vanes 53 to further guide the air flow.

[0069] In one embodiment, the suction disc 52 is magnetically adsorbed on the outer wall of the electromagnet 51. One end of the spring 55 abuts against the friction disc 57, and the other end of the spring 55 abuts 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 groove 32. The position of the heat dissipation box 13 corresponds to the position of the heat exchange hole 31. The baffle 30 is rotatably connected to the outer wall of the connecting disc 56. In the initial state, the electromagnet 51 firmly adsorbs and fixes the suction disc 52 by its magnetic force, ensuring the stable structure of the entire heat dissipation system. At this time, there is a certain gap between the friction disc 57 and the connecting disc 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 immediately lose its magnetism. At this time, under the push of the spring 55, the friction disc 57 contacts 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 rotational movement of the motor shaft 24 will be directly transmitted to the friction disc 57 through the connecting disc 56. The rotation of the friction disc 57 further drives the rotating seat 54 to start rotating through the transmission of the guide post 58. The rotating seat 54 drives the guide vane 53 to rotate. The guide vane 53 rotates at a high speed, creating a negative pressure at the position of the exhaust hole 23. Fresh air from the outside continuously enters the motor through the intake hole 29, flows into the gap between the rotor and the stator, then passes through the heat conducting sheet 27 and the exhaust hole 23, and finally is discharged through the through groove 32. During this process, not only can the heat inside the motor be discharged to dissipate heat from the rotor and the stator, but also the heat dissipation of the support bearing 25 can be accelerated. At the same time, external air also flows from the heat exchange hole 31 into the space between the baffle 30 and the housing 20, and then is discharged through the through groove 32, thereby accelerating the heat dissipation of the coolant.

[0070] Through the above heat dissipation, not only is the effective discharge of the heat inside the motor ensured, but also the comprehensive heat dissipation of the rotor, stator and support bearing 25 is achieved. At the same time, the heat dissipation efficiency of the coolant is improved, ensuring the continuous and stable operation of the axial flux motor.

[0071] In one embodiment, in order to accurately monitor the operating state of the axial flux motor and ensure safe and efficient operation, multiple temperature sensors are arranged inside it, which are respectively responsible for detecting the operating temperatures of the stator core 17 and the rotor disc 34, thereby realizing the comprehensive monitoring of the temperatures of the key components inside the motor.

[0072] When the working 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.

[0073] When the circulation pump 14 starts, it can make the coolant circulate, so as to more effectively take away the heat on the stator core 17, help reduce its temperature, and prevent overheating;

[0074] When the working temperature of the rotor disc 34 exceeds its rated value, the temperature sensor at this part sends an alarm signal to the motor control system. The motor control system controls the electromagnet 51 to power off. The power-off of the electromagnet 51 will release its adsorption effect on the adsorption disc 52. Then, under the push of the spring 55, the diversion component 501 is triggered to work, sucking in external air for heat dissipation, so as to effectively reduce the temperature of the rotor disc 34 and its surrounding components.

[0075] When the present invention is working: when heat dissipation of the axial flux motor is required, the circulation pump 14 works. Driven by the circulation pump 14, the coolant circulates between the heat exchange tube 11, the heat dissipation box 13 and the connecting tube 12. When the coolant is pumped into the interior of the heat exchange tube 11, it absorbs the heat generated by the stator core 17 during operation, reducing the working temperature of the stator core 17. Then the coolant that has absorbed heat flows into the heat dissipation box 13. Under the action of the inner partition 16, the coolant can come into contact with the interior of the box body more fully. Then, the heat in the coolant is dissipated into the surrounding air through the heat dissipation fins 15 outside the heat dissipation box 13, so as to keep the temperature of the heat dissipation box 13 and the coolant at a relatively low level;

[0076] At the same time, the electromagnet 51 receives a power-off signal and loses magnetism. At this time, under the push of the spring 55, the friction disc 57 contacts 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 rotational movement of the motor shaft 24 will be directly transmitted to the friction disc 57 through the connecting disc 56. The rotation of the friction disc 57 further drives the rotating seat 54 to start rotating through the transmission of the guide post 58. The rotating seat 54 drives the guide vane 53 to rotate. The guide vane 53 rotates at a high speed, forming a negative pressure at the position of the exhaust hole 23. External air is continuously sucked into the motor through the air inlet hole 29, flows into the gap between the rotor and the stator, then flows through the heat conducting sheet 27 and the exhaust hole 23, and finally is discharged through the through groove 32. During the exhaust process, not only can the heat inside the motor be discharged to realize heat dissipation of the rotor and the stator, but also the heat dissipated by the support bearing 25 can be discharged. At the same time, external air also flows into the space between the baffle 30 and the housing 20 through the heat exchange hole 31, and then is discharged through the through groove 32 to discharge the heat dissipated by the coolant, accelerating the heat dissipation of the coolant.

[0077] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various changes or substitutions thereof, and these should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claimed rights.

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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