Axial flux motor with double cooling water channels

Abstract

In order to solve the problem of poor effect of a cooling heat dissipation mode in the prior art, the utility model provides a double-cooling-water-channel axial magnetic flux motor, which comprises an irregular hollow cylindrical outer ring casing and a stator iron core arranged in the outer ring casing, the outer ring casing is provided with an outer cooling water channel groove, the stator iron core comprises an iron core with a winding and a stator support, and the stator support is provided with an inner cooling water channel groove. The stator support is provided with an inner cooling water channel. According to the utility model, one cooling water channel is used to dissipate heat generated by the outer ring of the winding coil by using the outer ring casing, and the other cooling water channel is used to directly dissipate heat of two sides of the winding coil in direct contact with the stator support by using the positioning ribs on the stator support, so that the overall heat dissipation effect of the motor can be better improved by the two cooling water channels; the motor working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor cooling, in particular to an axial flux motor with double cooling water channels. Background Art

[0002] Axial flux motors are also called disc motors. Compared with traditional radial motors, the air gap is in a planar form and the magnetic field is in the axial direction. It has a higher power density ratio and is gradually accepted by the market. At present, there is only one main cooling method for disc motors: cooling through the cooling water channel on the casing, which has a relatively poor heat dissipation effect; or directly immersing the stator assembly in the coolant, which does not significantly improve the heat dissipation effect.

[0003] In order to solve the above problems, the Chinese invention patent with patent number CN117175835A proposes a stator water-cooling structure and cooling control method for an axial flux motor, including a first shell, a second shell, a stator winding and a rotor. Stator windings are arranged on both sides of the rotor, and the outer side of one stator winding is equipped with a first shell, and the outer side of the other stator winding is equipped with a second shell; the interior of the first shell and the second shell both include an outer water channel cover plate, an outer ring water channel cover plate, an outer water channel shell, an inner water channel outlet side shell and an inner water channel inlet side shell. However, the invention only dissipates heat for the contacting iron core, while the largest heat source is the winding coil. The heat generated by the winding coil needs to be dissipated through heat conduction of the iron core. This cooling and heat dissipation method has poor effect, resulting in low motor working efficiency. Utility Model Content

[0004] The utility model mainly solves the problem of poor cooling and heat dissipation effect in the prior art and provides an axial flux motor with double cooling water channels.

[0005] The above technical problems of the utility model are mainly solved by the following technical solutions:

[0006] A dual cooling water channel axial flux motor, characterized in that it includes an irregular hollow cylindrical outer ring housing and a stator core installed in the outer ring housing, the outer ring housing is provided with an outer cooling water channel groove, the stator core includes a winding core and a stator bracket, and the stator bracket is provided with an inner cooling water channel. The utility model adopts one cooling water channel to dissipate the heat generated by the outer ring of the winding coil using the outer ring housing, and another cooling water channel to directly dissipate the heat on both sides of the winding coil in direct contact with the stator bracket using the positioning ribs on the stator bracket. The two cooling water channels can better improve the overall heat dissipation effect of the motor and improve the working efficiency of the motor.

[0007] As a preferred solution, the stator bracket includes a hollow cylindrical stator support frame, and a plurality of stator support shafts are evenly arranged on the column of the stator support frame for mounting the winding core and increasing the heat dissipation area through sufficient contact.

[0008] As a preferred solution, a stator pressure plate is provided at one end of the stator support shaft away from the stator support frame for fixing the winding core.

[0009] As a preferred solution, the stator pressure plate is fixed to one end of the stator support shaft by fixing bolts, and the shapes of both sides of the stator pressure plate match the winding core, which can fully contact to increase the heat dissipation area and ensure stability.

[0010] As a preferred solution, a symmetrical inner water channel groove is provided on the side of the outer ring housing, a stator support shaft is provided in the inner water channel groove, and an inner water channel nozzle is provided at one end of the stator support shaft away from the stator support frame for introducing or discharging cooling water.

[0011] As a preferred solution, a rubber sleeve is further provided between the inner water channel groove and the stator support shaft to achieve shockproof and sealing.

[0012] As a preferred solution, the side of the outer ring housing is also provided with a symmetrical external water channel groove, the external water channel groove is connected to the external cooling water channel groove, and the groove opening of the external water channel groove is provided with an external water channel nozzle for introducing or draining cooling water.

[0013] As a preferred solution, the outer cooling water channel groove reciprocates along the axial arc to form an outer cooling water channel to achieve heat dissipation of the outer ring housing.

[0014] As a preferred solution, the outer ring housing and the stator core are formed into a whole by pouring resin glue, so that the heat generated can be transferred to the outer ring housing through the potting glue.

[0015] Therefore, the advantages of the utility model are:

[0016] This solution uses a cooling system to directly cool the winding coil part and another cooling system to dissipate heat from the casing part, which can better improve the heat dissipation effect of the motor and improve the working efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model.

[0018] Figure 2 yes Figure 1 sectional view of .

[0019] Figure 3 yes Figure 2 A partial enlarged view of .

[0020] Figure 4 yes Figure 1 Another cross-sectional view of .

[0021] In the figure: 1. outer ring housing; 2. stator bracket; 3. winding core; 4. inner water channel nozzle; 5. outer water channel nozzle; 11. outer cooling water channel groove; 21. stator support frame; 22. stator support shaft; 23. stator pressure plate; 211. inner cooling water channel. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0023] Example:

[0024] At present, the main cooling method of disc motors is to add cooling water channels on the casing, and then inject circulating coolant to dissipate the heat of the stator components in contact with the casing. The winding coil of the motor is the main heat source, and this method cannot directly dissipate the heat, resulting in poor overall heat dissipation effect of the motor. The utility model directly cools the winding coil part through a cooling system, and dissipates the heat of the casing part through another cooling system, which can better improve the heat dissipation effect of the motor and improve the working efficiency of the motor.

[0025] In order to achieve the above effects, the utility model provides a dual cooling water channel axial flux motor, including an irregular hollow cylindrical outer ring housing 1 and a stator core installed in the outer ring housing 1, which effectively increases the heat dissipation surface area. The outer ring housing 1 is provided with an external cooling water channel groove 11. These external cooling water channel grooves 11 are optimized in layout to enable the cooling medium to flow efficiently, thereby taking away a large amount of heat and ensuring that the motor can maintain a stable temperature when running at high speed. The stator core includes a winding core 3 and a stator bracket 2. The stator bracket 2 is provided with an internal cooling water channel 211. These internal cooling water channels 211 are cleverly designed to enable the cooling medium to directly contact the inner surface of the stator core, thereby effectively taking away the heat generated when the winding coil is working.

[0026] The axial flux motor with dual cooling water channel design of the utility model realizes an efficient thermal management system through the synergistic effect of the outer cooling water channel groove 11 and the inner cooling water channel 211. When the motor is running, the heat generated by the winding coil is first transferred to the inner cooling water channel 211 through the stator core. The cooling medium flows in the inner cooling water channel 211, quickly taking away the heat to prevent the stator core from overheating. At the same time, the outer cooling water channel groove 11 on the outer ring housing 1 is also working continuously, and the residual heat transferred from the inner cooling water channel 211 is taken away again through the flow of the external cooling medium.

[0027] This design not only improves the heat dissipation efficiency of the motor, but also extends the service life of the motor. Since the heat is effectively controlled within a safe range, the materials of the stator core and winding coil will not age or be damaged due to overheating. In addition, this cooling system also enables the motor to operate stably at higher power, improving the performance of the motor.

[0028] In addition, the irregular hollow cylindrical design of the outer ring housing 1 also has structural advantages. It can effectively alleviate the mechanical stress and vibration generated when the motor is running, and provide additional mechanical strength and stability. This is especially important for motors that need to work continuously for a long time, and can significantly reduce maintenance frequency and costs.

[0029] In summary, the dual-cooling water channel axial flux motor designed in the utility model ensures that the motor can maintain good thermal management performance under various working conditions through the combined action of the inner and outer cooling systems, which not only improves the efficiency and reliability of the motor, but also extends its service life. It is an innovative motor design with broad application prospects.

[0030] The stator bracket 2 is a key component of the utility model. It not only bears the task of supporting the stator core, but also plays an important role in the overall structure and heat dissipation performance of the motor. The stator bracket 2 includes a hollow cylindrical stator support frame 21, and a plurality of stator support shafts 22 are evenly arranged on the column of the stator support frame 21. These stator support shafts 22 are arranged at an optimized spacing to ensure that the stator core can be firmly fixed on the stator bracket 2. The design of the stator support shaft 22 in the utility model takes into account the mechanical properties and heat conduction efficiency. A stator pressure plate 23 is provided at one end of the stator support shaft 22 away from the stator support frame 21. The stator pressure plate 23 is fixed to one end of the stator support shaft 22 by a high-strength fixing bolt to ensure that the stator core will not be displaced or loosened during the operation of the motor. The shapes of the two sides of the stator pressure plate 23 are precisely matched with the winding core 3, which not only improves the stability of the installation, but also helps to better transfer and disperse the heat generated during operation. A part of the inner cooling water channel 211 in the stator bracket 2 is arranged in the stator support frame 21. The shape of this part is the same as the stator support frame 21 and is annular to ensure that they are fully fitted. Another part of the inner cooling water channel 211 is arranged in each stator support shaft 22. They are connected and communicated with the inner cooling water channel 211 part of the stator support frame 21 along the direction of the stator support shaft 22, so that each component and even each corner of the stator bracket 2 has a cooling function.

[0031] In practical applications, the design and manufacturing process of the stator support frame 21 and its supporting components are crucial. The stator support frame 21 is made of high-quality materials and manufactured through precision machining and heat treatment processes to ensure that it has sufficient mechanical strength and durability. The material and diameter of the stator support shaft 22 are carefully selected and calculated to meet the high-strength support requirements and can effectively conduct the heat of the stator core.

[0032] The design of the stator pressure plate 23 is also very sophisticated. It must not only meet the size and shape requirements of the stator core, but also have good thermal conductivity. The selection and installation method of the fixing bolts have also been strictly verified to ensure that they will not loosen or be damaged during long-term use. The contact surface between the stator pressure plate 23 and the stator core has been finely polished and processed to minimize the contact thermal resistance and improve the heat conduction efficiency.

[0033] This complex and sophisticated design not only ensures the stable connection and reliable operation of the internal components of the motor, but also greatly improves the overall heat dissipation efficiency of the motor. The hollow cylindrical design of the stator support frame 21 not only reduces the weight of the motor, but also provides a certain internal space for arranging cooling systems or other auxiliary equipment. The uniform arrangement of the stator support shaft 22 enables the stator core to disperse the force at multiple support points, avoiding the stress concentration and deformation problems caused by single-point force.

[0034] In addition, the modular design of the stator bracket 2 makes the motor more convenient during production, maintenance and repair. Modular components can be quickly disassembled and replaced, reducing downtime and maintenance costs. This design concept is increasingly valued in modern industrial applications, especially in large motors that require efficient and stable operation. This advanced design concept of the dual cooling water channel axial flux motor has undoubtedly set a new benchmark for the industry.

[0035] In short, the fine design and manufacturing of the stator bracket 2 and its related components are important guarantees for the efficient operation of the dual cooling channel axial flux motor. This design not only improves the mechanical strength and stability of the motor, but also significantly improves its heat dissipation performance and service life, reflecting the advanced level and future development direction of modern motor design.

[0036] Symmetrical inner water channel grooves are provided on the side of the outer ring housing 1. The setting of the inner water channel grooves not only increases the path of the cooling water flow, but also improves the cooling efficiency. In addition, the symmetrical design on the outer side of the outer ring housing 1 can also ensure uniform heat dissipation of the stator bracket 2. A stator support shaft 22 is provided in the inner water channel groove, and an inner water channel nozzle 4 is provided at one end of the stator support shaft 22 away from the stator support frame 21, which is used to inject or release cooling water. A rubber sleeve is also provided between the inner water channel groove and the stator support shaft 22, and the existence of the rubber sleeve has multiple functions. First, the rubber material has good elasticity and shock absorption performance, which can buffer the vibration and impact that the stator support shaft 22 may be subjected to during operation, and protect the shaft body and the housing from damage. Secondly, the rubber sleeve also has a certain sealing performance, which can effectively prevent the cooling water from leaking to other components, thereby keeping the inside of the motor dry and clean.

[0037] The selection and installation of the rubber bushing is also a process that requires careful consideration. Generally speaking, the rubber bushing needs to be resistant to high temperatures, corrosion, and have good mechanical properties to meet the working requirements of the motor in harsh environments. During installation, it is necessary to ensure that the bushing fits tightly with the inner water channel groove and the stator support shaft 22 to avoid reduced cooling efficiency or other safety hazards caused by looseness or unsealing.

[0038] This complex and sophisticated design concept has shown great advantages in practical applications. Especially in some high-load, long-duration industrial motors, this outer ring housing 1 structure with internal water channel grooves not only significantly improves the cooling effect, but also provides a solid guarantee for the long-term stable operation of the motor. It can be foreseen that with the continuous advancement of technology and the continuous improvement of application needs, this design will be promoted and applied in more fields, providing new solutions for the performance improvement and reliability guarantee of various motor equipment.

[0039] A symmetrical external water channel groove is also provided on the side of the outer ring housing 1, and the external water channel groove is connected to the external cooling water channel groove 11. The groove of the external water channel groove is provided with an external water channel nozzle 5 to achieve the inflow and discharge of cooling water. Through the external water channel groove, the staff can easily connect the external water channel nozzle 5 to introduce cooling water into the external water channel groove, thereby achieving cooling of the outer ring housing 1. At the same time, the external water channel nozzle 5 can also ensure the stability of the flow and pressure of the cooling water to achieve the best cooling effect.

[0040] The design of the symmetrical outer water channel groove, the outer cooling water channel groove 11 and the outer water channel nozzle 5 on the side of the outer ring housing 1 further improves the cooling effect of the utility model. Through these designs, the cooling water can fully cover the surface of the outer ring housing 1, quickly take away the generated heat, and keep the temperature inside the motor within a reasonable range. This not only improves the operating efficiency and stability of the motor, but also extends the service life of the motor. In short, the design of the outer water channel groove, the outer cooling water channel groove 11 and the outer water channel nozzle 5 on the side of the outer ring housing 1 is a key component of the cooling system of the utility model. Their reasonable layout and design can effectively improve the cooling effect of the motor and ensure the stability and reliability of the motor under high load and long-term operation.

[0041] The outer cooling water channel groove 11 reciprocates along the axial arc to form an outer cooling water channel, and the angle of each reciprocation is 90 degrees. This design helps to increase the contact area between the cooling water and the outer ring housing 1, and improves the heat dissipation effect. When the motor is running, the cooling water flows in the outer cooling water channel, and the generated heat is quickly taken away by the reciprocating motion, which effectively reduces the temperature of the outer ring housing 1 and ensures the stable operation of the motor.

[0042] The outer ring housing 1 and the stator core are formed into a whole by pouring resin glue, so that the heat generated can be transferred to the outer ring housing 1 through the potting glue. The pouring resin glue has good thermal conductivity and can quickly transfer heat from the stator core to the surface of the outer ring housing 1, thereby accelerating the dissipation of heat. Such a design not only improves the overall heat dissipation effect of the motor, but also helps to reduce the temperature gradient, reduce the thermal stress inside the motor, and extend the service life of the motor. In addition, this also improves the sealing of the motor. Excellent sealing performance helps prevent dust, moisture, etc. from the external environment from eroding the inside of the motor, reduces the risk of insulation aging, and improves the reliability and safety of the motor.

[0043] In summary, the utility model adopts one cooling water channel to dissipate the heat generated by the outer ring of the winding coil using the outer ring housing 1, and another cooling water channel to directly dissipate the heat on both sides of the winding coil in direct contact with the stator bracket 2 using the positioning ribs on the stator bracket 2. The two cooling water channels can better improve the overall heat dissipation effect of the motor and improve the working efficiency of the motor.

[0044] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A dual cooling water channel axial flux motor, characterized in that: It comprises an irregular hollow cylindrical outer ring casing and a stator core installed in the outer ring casing, wherein the outer ring casing is provided with an external cooling water channel groove, the stator core comprises a winding core and a stator bracket, and the stator bracket is provided with an internal cooling water channel.

2. The double cooling water channel axial flux motor according to claim 1, characterized in that: The stator bracket comprises a hollow cylindrical stator support frame, and a plurality of stator support shafts are evenly arranged on the column of the stator support frame.

3. The double cooling water channel axial flux motor according to claim 2, characterized in that: A stator pressure plate is provided at one end of the stator support shaft away from the stator support frame.

4. The double cooling water channel axial flux motor according to claim 3, characterized in that: The stator pressure plate is fixed to one end of the stator support shaft by means of fixing bolts, and the shapes of the two sides of the stator pressure plate are matched with the winding core.

5. The double cooling water channel axial flux motor according to claim 2, characterized in that: A symmetrical inner water channel groove is provided on the side surface of the outer ring housing, a stator support shaft is provided in the inner water channel groove, and an inner water channel nozzle is provided at one end of the stator support shaft away from the stator support frame.

6. The double cooling water channel axial flux motor according to claim 5, characterized in that: A rubber sleeve is also provided between the inner water channel groove and the stator supporting shaft.

7. A dual cooling water channel axial flux motor according to claim 1 or 5, characterized in that: A symmetrical outer water channel groove is also provided on the side of the outer ring housing, and the outer water channel groove is connected to the outer cooling water channel groove, and an outer water channel nozzle is provided at the groove opening of the outer water channel groove.

8. The double cooling water channel axial flux motor according to claim 1, characterized in that: The outer cooling water channel groove reciprocates in an axial arcuate shape to form an outer cooling water channel.

9. The double cooling water channel axial flux motor according to claim 1, characterized in that: The outer ring housing and the stator core are formed into a whole by pouring resin glue.

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