A dual rotor electric machine

Abstract

The application discloses a double-rotor motor, which comprises a shell, a stator winding, a cooling piece, a rotating shaft and a rotor assembly, the shell is hollow, the stator winding is connected to the circumferential inner wall of the shell, the cooling piece is connected to the shell and can exchange heat with the stator winding, the rotating shaft is rotatably connected to the shell, the rotor assembly comprises a first rotor and a second rotor, the first rotor is fixedly sleeved on the rotating shaft and forms a first gap with the stator winding, the second rotor is built-in the first gap and is connected to the rotating shaft, and the second rotor divides the first gap into a second gap and a third gap which are communicated with each other and can form gas circulation. The application can effectively solve the problem that the heat is difficult to be quickly and effectively dissipated due to the relatively long heat dissipation path in the double-rotor motor, thereby reducing the reliability and stability of the motor.

Description

Technical Field

[0001] This invention relates to the field of motor cooling technology, specifically to a dual-rotor motor. Background Technology

[0002] Compared to traditional single-rotor motors, dual-rotor motors offer significantly increased heat dissipation depth. Heat needs to be transferred between the two rotors through a double air gap to dissipate within the stator cavity. The permanent magnet rotor, in particular, faces an extremely harsh heat dissipation environment. Permanent magnet materials are highly sensitive to temperature; excessively high temperatures can degrade their magnetic properties, impacting the overall performance and efficiency of the motor. Furthermore, the permanent magnet rotor's deep location within the motor makes heat dissipation difficult and inefficient. Its heat dissipation path is relatively long and constrained by surrounding structures, hindering heat conduction. Moreover, the narrow space between the two rotors and the compact layout of the entire motor restrict the flow of cooling media (such as air), rendering traditional ventilation cooling methods ineffective. Existing cooling designs often fail to reach the internal area of ​​the permanent magnet rotor for efficient heat dissipation, hindering the timely removal of heat from the motor and causing a rapid rise in internal motor temperature.

[0003] Therefore, there is an urgent need for a dual-rotor motor to solve the problem that the relatively long internal heat dissipation path of the dual-rotor motor makes it difficult to dissipate heat quickly and effectively, thus reducing the reliability and stability of the motor. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a dual-rotor motor to solve the technical problem in the prior art where the heat dissipation path inside the dual-rotor motor is relatively long, making it difficult to dissipate heat quickly and effectively, thus reducing the reliability and stability of the motor.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] This invention provides a dual-rotor motor, comprising:

[0007] Shell, hollow inside;

[0008] Stator windings are connected to the circumferential inner wall of the housing;

[0009] A cooling component, connected to the housing, is capable of exchanging heat with the stator windings;

[0010] A rotating shaft is rotatably connected to the housing; and

[0011] The rotor assembly includes a first rotor and a second rotor. The first rotor is fixedly sleeved on the shaft and forms a first gap with the stator winding. The second rotor is built into the first gap and connected to the shaft. The second rotor divides the first gap into a second gap and a third gap that are interconnected and can form a gas circulation.

[0012] In some embodiments, the second rotor is cylindrical and open at both ends. The second rotor is coaxially arranged with the rotating shaft. The second gap is formed between the circumferential outer wall of the second rotor and the circumferential inner wall of the stator winding. The third gap is formed between the circumferential inner wall of the second rotor and the circumferential outer wall of the first rotor. The rotor assembly also includes two end plates. The two end plates are parallel to each other and spaced apart, and are both connected to the rotating shaft. The two end plates are respectively connected to the two open ends of the second rotor. The end plates have at least one first through hole, which penetrates the end plate and communicates with both the second gap and the third gap.

[0013] In some embodiments, the rotor assembly further includes a fan, which is coaxially disposed with the first rotor and connected to one end of the first rotor.

[0014] In some embodiments, the first rotor has a second through hole along its axis, the second through hole penetrating the first rotor and communicating with the third gap.

[0015] In some embodiments, the first rotor is further provided with at least one third through hole along its axis. The third through hole penetrates the first rotor and communicates with the third gap. The third through hole is spaced apart from the second through hole and is disposed relative to the second through hole and close to the axis of the first rotor. The diameter of the third through hole is smaller than the diameter of the second through hole.

[0016] In some embodiments, the rotor assembly further includes a plurality of first fins, which are parallel to each other and spaced apart along the axis of the second rotor and are respectively connected to the circumferential outer wall of the second rotor.

[0017] In some embodiments, the first fin is spirally arranged along the axis of the second rotor and connected to the circumferential outer wall of the second rotor.

[0018] In some embodiments, the rotor assembly further includes a plurality of second fins, which are parallel to each other and spaced apart along the axis of the second rotor and are respectively connected to the circumferential inner wall of the second rotor.

[0019] In some embodiments, the second fin is spirally arranged along the axis of the second rotor and connected to the circumferential inner wall of the second rotor.

[0020] In some embodiments, the cooling element is cylindrical, sleeved on the stator winding and connected to the circumferential inner wall of the housing, and the circumferential sidewall of the cooling element forms a water circulation cavity, which is used to fill the circulating cooling water and can exchange heat with the outside.

[0021] Compared with the prior art, the beneficial effects of the dual-rotor motor provided by the present invention include: the stator winding is connected to the circumferential inner wall of the housing; the cooling element can exchange heat with the stator winding; the first rotor and the second rotor are sealed to the housing via a shaft and can rotate relative to the stator winding; a first gap is formed between the first rotor and the stator winding; the second rotor is built into the first gap, dividing the first gap into a second gap and a third gap that are interconnected, and the second gap and the third gap can form a gas circulation. Compared with the prior art, by setting the second gap and the third gap that are interconnected and can form a gas circulation, the heat generated in the third gap when the inner rotor is working can enter the second gap with the gas circulation, and the heat in the second gap can exchange heat with the cooling element, so that the heat in the second gap and the third gap are both absorbed by the cooling element. This can achieve rapid cooling and heat dissipation inside the dual-rotor motor, avoid the internal temperature of the motor from rising, and solve the technical problem in the prior art that the heat dissipation path inside the dual-rotor motor is relatively long, making it difficult to dissipate heat quickly and effectively, thus reducing the reliability and stability of the motor. Attached Figure Description

[0022] Figure 1 This is a partial cross-sectional view of a dual-rotor motor provided in an embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of a dual-rotor motor provided in an embodiment of the present invention;

[0024] Figure 3 This is a partial cross-sectional view of the connection between the rotating shaft and the rotor assembly provided in an embodiment of the present invention;

[0025] Figure 4 This is a cross-sectional view of the connection between the rotating shaft and the rotor assembly provided in an embodiment of the present invention;

[0026] Figure 5 This is a three-dimensional structural diagram of the connection between the second rotor and the first and second fins provided in an embodiment of the present invention;

[0027] Figure 6This is an enlarged schematic diagram of the connection between the second rotor and the first and second fins provided in an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Housing; 2. Stator winding; 3. Cooling component; 4. Rotor shaft; 5. Rotor assembly; 51. First rotor; 511. Second through hole; 512. Third through hole; 52. Second rotor; 53. End plate; 531. First through hole; 54. Fan; 55. First fin; 56. Second fin; 6. First gap; 61. Second gap; 62. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0031] To address the technical problem of reduced reliability and stability caused by the relatively long internal heat dissipation path of a dual-rotor motor, which makes it difficult to dissipate heat quickly and effectively, this invention provides a dual-rotor motor that can achieve rapid cooling and heat dissipation of the internal components of the dual-rotor motor by setting up a second gap 61 and a third gap 62 that are interconnected and can form a gas circulation. This allows the heat generated in the third gap 62 during the operation of the inner rotor to enter the second gap 61 with the gas circulation, and the heat in the second gap 61 can exchange heat with the cooling element 3. As a result, the heat in both the second gap 61 and the third gap 62 is absorbed by the cooling element 3, thereby achieving rapid cooling and heat dissipation of the internal components of the dual-rotor motor and preventing the internal temperature of the motor from rising.

[0032] It should be noted that the dual-rotor motor described in this invention is used in, but not limited to, the field of motor cooling technology. For ease of explanation, this invention will only use the application of the dual-rotor motor in the field of motor cooling technology as an example. The principle of the dual-rotor motor in other types of equipment is essentially the same as that in the field of motor cooling technology, and will not be described in detail here.

[0033] Please see Figure 1 , Figure 1 , Figure 2This is a schematic diagram of the structure of a dual-rotor motor in one embodiment of the present invention. The dual-rotor motor includes: a housing 1, a stator winding 2, a cooling element 3, a rotating shaft 4, and a rotor assembly 5. The housing 1 is hollow inside. The stator winding 2 is connected to the circumferential inner wall of the housing 1. The cooling element 3 is connected to the housing 1 and can exchange heat with the stator winding 2. The rotating shaft 4 is rotatably connected to the housing 1. The rotor assembly 5 includes a first rotor 51 and a second rotor 52. The first rotor 51 is fixedly sleeved on the rotating shaft 4 and forms a first gap 6 between it and the stator winding 2. The second rotor 52 is built into the first gap 6 and connected to the rotating shaft 4. The second rotor 52 divides the first gap 6 into a second gap 61 and a third gap 62 that are interconnected and can form a gas circulation.

[0034] In this device, the stator winding 2 is connected to the circumferential inner wall of the housing 1, and the cooling component 3 can exchange heat with the stator winding 2. The first rotor 51 and the second rotor 52 are sealed to the housing 1 via the rotating shaft 4 and can rotate relative to the stator winding 2. A first gap 6 is formed between the first rotor 51 and the stator winding 2. The second rotor 52 is built into the first gap 6 and divides the first gap 6 into a second gap 61 and a third gap 62 that are interconnected. The second gap 61 and the third gap 62 can form a gas circulation.

[0035] Compared to existing technologies, by setting up a second gap 61 and a third gap 62 that are interconnected and can form a gas circulation, the heat generated in the third gap 62 during the operation of the inner rotor can enter the second gap 61 with the gas circulation. The heat in the second gap 61 can exchange heat with the cooling element 3, so that the heat in both the second gap 61 and the third gap 62 is absorbed by the cooling element 3. This enables rapid cooling and heat dissipation of the internal components of the dual-rotor motor, preventing the internal temperature of the motor from rising. It can solve the technical problem in existing technologies where the heat dissipation path inside the dual-rotor motor is relatively long, making it difficult to dissipate heat quickly and effectively, thus reducing the reliability and stability of the motor.

[0036] Furthermore, the rotating shaft 4 and the housing 1 in this device are sealed together by bearings and oil seals. The device also includes a permanent magnet with multiple mounting slots along the circumference. The first rotor 51 includes multiple rotor blocks, which are arranged in a one-to-one correspondence with the mounting slots and connected to the mounting slots. Here, the housing 1, stator winding 2, rotating shaft 4, permanent magnet and rotor blocks are all conventional arrangements known to those skilled in the art, and will not be described in detail here.

[0037] In this embodiment, as Figures 1 to 5As shown, the second rotor 52 is cylindrical and open at both ends. The second rotor 52 is coaxially arranged with the rotating shaft 4. A second gap 61 is formed between the circumferential outer wall of the second rotor 52 and the circumferential inner wall of the stator winding 2. A third gap 62 is formed between the circumferential inner wall of the second rotor 52 and the circumferential outer wall of the first rotor 51. The rotor assembly 5 also includes two end plates 53. The two end plates 53 are parallel to each other and spaced apart, and are both connected to the rotating shaft 4. The two end plates 53 are respectively connected to the two open ends of the second rotor 52. The end plate 53 has at least one first through hole 531. The first through hole 531 penetrates the end plate 53 and is connected to both the second gap 61 and the third gap 62.

[0038] The cylindrical second rotor 52 is housed in the first gap 6 and forms a second gap 61 with the circumferential inner wall of the stator winding 2. The circumferential inner wall of the second rotor 52 and the circumferential outer wall of the first rotor 51 form a third gap 62.

[0039] Furthermore, the two end plates 53 are respectively connected to the rotating shaft 4 and respectively connected to the two end openings of the second rotor 52 to realize the connection between the second rotor 52 and the rotating shaft 4. The end plates 53 are rotatably connected to the rotating shaft 4 via bearings, so that the end plates 53 and the second rotor 52 can rotate relative to the rotating shaft 4. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0040] Furthermore, each of the two end plates 53 has at least one through hole 531 that penetrates the end plate 53, through which the second gap 61 and the third gap 62 are connected for gas circulation.

[0041] In one embodiment, such as Figure 2 , Figure 3 As shown, the rotor assembly 5 also includes a fan 54, which is coaxially arranged with the first rotor 51 and connected to one end of the first rotor 51.

[0042] The fan 54 is connected to the first rotor 51 and can rotate together with the shaft 4. During the rotation of the fan 54, centrifugal air pressure is generated. Under the action of centrifugal air pressure, the gas can be circulated between the second gap 61 and the third gap 62, which is beneficial to improving the heat dissipation effect.

[0043] Furthermore, the fan 54 here has multiple fan blades, which are connected to one end of the first rotor 51 and can rotate with the first rotor 51 to generate centrifugal air pressure. The fan 54 here is a conventional configuration known to those skilled in the art, and will not be described in detail here.

[0044] In one embodiment, such as Figure 4As shown, the first rotor 51 has a second through hole 511 along its axis. The second through hole 511 passes through the first rotor 51 and is connected to the third gap 62.

[0045] The first rotor 51 is also provided with multiple second through holes 511, which can help circulate the heat generated inside the first rotor 51 under the action of centrifugal wind pressure, thereby improving the heat dissipation effect of the dual rotor motor.

[0046] Furthermore, the axis of the second through hole 511 is arranged parallel to the axis of the first rotor 51, and the multiple second through holes 511 are evenly and spaced apart along the circumference of the first rotor 51.

[0047] In one embodiment, such as Figure 4 As shown, the first rotor 51 is also provided with at least one third through hole 512 along its axis. The third through hole 512 passes through the first rotor 51 and is connected to the third gap 62. The third through hole 512 is spaced apart from the second through hole 511 and is positioned close to the axis of the first rotor 51 relative to the second through hole 511. The diameter of the third through hole 512 is smaller than the diameter of the second through hole 511.

[0048] By adding at least one third through hole 512, the efficiency of gas circulation can be effectively improved, and the heat dissipation effect can be effectively enhanced.

[0049] Furthermore, the device has two third through holes 512, and the diameter of the third through hole 512 is smaller than that of the second through hole 511, which can improve the efficiency of gas circulation and effectively improve the heat dissipation effect.

[0050] In one embodiment, the number of holes in the first through hole 531, the second through hole 511, and the third through hole 512 axially arranged on the first rotor 51 and the second rotor 52 is inconsistent, and the rotational speeds of the first rotor 51 and the second rotor 52 are generally inconsistent, so that the holes of the first rotor 51 and the second rotor 52 can be periodically aligned. When the holes of the first through hole 531 are aligned with the holes of the second through hole 511 and the third through hole 512, the ventilation speed of the aligned holes is periodically increased, while the ventilation speed of the other misaligned through holes is reduced.

[0051] Furthermore, when the holes are aligned, the aligned holes operate in the turbulent region, and the relationship between the heat transfer coefficient and the wind speed is greater than the first power. The misaligned holes are in the laminar region, and the relationship between the heat transfer coefficient and the wind speed is less than the first power. That is, by setting different numbers of holes on the first rotor 51 and the end plate 53, a rhythmic periodic ventilation acceleration can be formed, which enhances heat transfer.

[0052] Furthermore, the heat transfer coefficient of aligned through holes is much higher than that of misaligned through holes, forming intermittent heat transfer ventilation. Under the condition of constant wind speed and wind pressure, the heat transfer coefficient is greatly improved, thus enhancing the heat transfer of the rotor.

[0053] In this embodiment, as Figure 5 , Figure 6 As shown, the rotor assembly 5 also includes a plurality of first fins 55 and a plurality of second fins 56.

[0054] In this configuration, multiple first fins 55 are arranged parallel to each other and spaced apart along the axis of the second rotor 52, and are respectively connected to the circumferential outer wall of the second rotor 52.

[0055] The first fin 55 is disposed between the second rotor 52 and the stator winding 2, which can effectively transfer the heat generated by the second rotor 52 during operation to the second gap 61, and then exchange and dissipate it using gas circulation and cooling components 3, which can effectively improve the heat dissipation effect.

[0056] Furthermore, the first fin 55 here is made of a material with high thermal conductivity, high strength and lightweight, or is made of a portion of the material of the reluctance rotor and processed into a specific spiral fin shape. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0057] In one embodiment, such as Figure 5 As shown, the first fin 55 is spirally arranged along the axis of the second rotor 52 and connected to the circumferential outer wall of the second rotor 52.

[0058] The first fin 55 is spirally arranged along the axis of the second rotor 52, so that the first fin 55 is inclined at a certain angle to the rotation axis 4 of the second rotor 52. When the rotor rotates, centrifugal wind pressure is generated. Under the action of centrifugal wind pressure, the gas can be promoted to circulate between the second gap 61 and the third gap 62, which is beneficial to improving the heat dissipation effect.

[0059] In one embodiment, such as Figure 5 , Figure 6 As shown, multiple second fins 56 are arranged parallel to each other and spaced apart along the axis of the second rotor 52, and are respectively connected to the circumferential inner wall of the second rotor 52.

[0060] The second fin 56 is disposed between the second rotor 52 and the first rotor 51, and can effectively transfer the heat generated by the second rotor 52 during operation to the third gap 62, and then exchange and dissipate it using gas circulation and cooling components 3, which can effectively improve the heat dissipation effect.

[0061] Furthermore, the second fin 56 here is made of a material with high thermal conductivity, high strength and lightweight, or is made of part of the material of the magnetic reluctance rotor, and is processed into a specific spiral fin shape. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0062] In one embodiment, such as Figure 5 As shown, the second fin 56 is spirally arranged along the axis of the second rotor 52 and connected to the circumferential inner wall of the second rotor 52.

[0063] The first fin 55 is spirally arranged along the axis of the second rotor 52, so that the second fin 56 is inclined at a certain angle to the rotation axis 4 of the second rotor 52. When the rotor rotates, centrifugal wind pressure is generated. Under the action of centrifugal wind pressure, the gas can be promoted to circulate between the second gap 61 and the third gap 62, which is beneficial to improving the heat dissipation effect.

[0064] In this embodiment, as Figure 1 , Figure 2 As shown, the cooling component 3 is cylindrical and is sleeved on the stator winding 2 and connected to the circumferential inner wall of the housing 1. The circumferential side wall of the cooling component 3 forms a water circulation cavity, which is used to fill the circulating cooling water and can exchange heat with the outside.

[0065] The cooling component 3 has multiple water circulation chambers for circulating cooling water. Through the contact between the cooling component 3 and the stator winding 2, the heat generated by the stator winding 2 and the heat in the second gap 61 can be exchanged to the circulating cooling water and carried out of the motor housing 1. The continuous circulation of the circulating cooling water can continuously cool and dissipate heat from the dual rotor motor.

[0066] Furthermore, the cooling component 3 with circulating cooling water is a common and readily available piece of equipment on the market, and is a conventional setup known to those skilled in the art, so it will not be described in detail here.

[0067] To better understand this invention, the following is combined with... Figures 1 to 6 The technical solution of the present invention will be described in detail below:

[0068] The stator winding 2 is connected to the circumferential inner wall of the housing 1. The cooling element 3 can exchange heat with the stator winding 2. The first rotor 51 and the second rotor 52 are sealed to the housing 1 via a shaft 4 and can rotate relative to the stator winding 2. A first gap 6 is formed between the first rotor 51 and the stator winding 2. The second rotor 52 is built into the first gap 6, which divides the first gap 6 into a second gap 61 and a third gap 62 that are interconnected and can form a gas circulation. Compared with the prior art, by setting the second gap 61 and the third gap 62 that are interconnected and can form a gas circulation, the heat generated in the third gap 62 when the inner rotor is working can enter the second gap 61 with the gas circulation, and the heat in the second gap 61 can exchange heat with the cooling element 3. This allows the heat in both the second gap 61 and the third gap 62 to be absorbed by the cooling element 3, which can achieve rapid cooling and heat dissipation inside the dual-rotor motor and prevent the internal temperature of the motor from rising.

[0069] In the specific working process of the present invention, when the dual-rotor motor is running, the second rotor 52 rotates. The first fins 55 provided on the outer surface of the second rotor 52 draw in external cold air along the axial direction. The cold air exchanges heat with the first fins 55 on the surface of the second rotor 52, carrying away the heat of the second rotor 52. At the same time, the second fins 56 provided on the inner surface draw internal heat through the third gap 62 and the second gap 61 to the first through hole 531 at the end.

[0070] Furthermore, the fan 54 mounted on the first rotor 51 rotates to generate wind pressure, driving air to flow within the third gap 62. This airflow then merges with the axial airflow on the outer surface of the first rotor 51 through the first through hole 531 on the end plate 53 connected to the second rotor 52, and propels the stator winding 2 further, forming a strong circulating airflow.

[0071] Furthermore, the axial airflow reaches the cooling element 3 on the stator winding 2 side through the axial return air duct, and exchanges heat with the cooling element 3. The cooling element 3 absorbs the heat of the airflow, cools the airflow, and forms a cooling flow from hot to cold. Finally, the airflow carries the heat and is discharged from the motor's preset air outlet, completing the cycle. This structure can automatically adjust according to the motor's operating conditions to adapt to different heat dissipation requirements.

[0072] This device, through the aforementioned structure, can solve the technical problem in the prior art where the relatively long internal heat dissipation path of a dual-rotor motor makes it difficult to dissipate heat quickly and effectively, thus reducing the reliability and stability of the motor.

[0073] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A dual-rotor motor, characterized in that, include: Shell, hollow inside; Stator windings are connected to the circumferential inner wall of the housing; A cooling component, connected to the housing, is capable of exchanging heat with the stator windings; A rotating shaft is rotatably connected to the housing, and The rotor assembly includes a first rotor and a second rotor. The first rotor is fixedly sleeved on the shaft and forms a first gap with the stator winding. The second rotor is built into the first gap and connected to the shaft. The second rotor divides the first gap into a second gap and a third gap that are interconnected and can form a gas circulation. The second rotor is cylindrical and open at both ends. The second rotor is coaxially arranged with the rotating shaft. The second gap is formed between the outer circumferential wall of the second rotor and the inner circumferential wall of the stator winding. The third gap is formed between the inner circumferential wall of the second rotor and the outer circumferential wall of the first rotor. The rotor assembly also includes two end plates. The two end plates are parallel to each other and spaced apart, and are both connected to the rotating shaft. The two end plates are respectively connected to the two open ends of the second rotor. The end plate has at least one first through hole, which penetrates the end plate and communicates with both the second gap and the third gap. The first rotor has a second through hole along its axis, the second through hole penetrates the first rotor and is connected to the third gap; The first rotor is provided with at least one third through hole along its axis. The third through hole penetrates the first rotor and is connected to the third gap. The third through hole is spaced apart from the second through hole and is positioned relative to the second through hole and close to the axis of the first rotor. The diameter of the third through hole is smaller than the diameter of the second through hole.

2. The dual-rotor motor according to claim 1, characterized in that, The rotor assembly also includes a fan, which is coaxially arranged with the first rotor and connected to one end of the first rotor.

3. The dual-rotor motor according to claim 1, characterized in that, The rotor assembly further includes a plurality of first fins, which are parallel to each other and spaced apart along the axis of the second rotor and are respectively connected to the circumferential outer wall of the second rotor.

4. The dual-rotor motor according to claim 3, characterized in that, The first fin is spirally arranged along the axis of the second rotor and connected to the circumferential outer wall of the second rotor.

5. The dual-rotor motor according to claim 1, characterized in that, The rotor assembly further includes a plurality of second fins, which are parallel to each other and spaced apart along the axis of the second rotor and are respectively connected to the circumferential inner wall of the second rotor.

6. The dual-rotor motor according to claim 5, characterized in that, The second fin is spirally arranged along the axis of the second rotor and connected to the circumferential inner wall of the second rotor.

7. The dual-rotor motor according to claim 1, characterized in that, The cooling component is cylindrical, sleeved on the stator winding, and connected to the circumferential inner wall of the housing. The circumferential sidewall of the cooling component forms a water circulation cavity, which is filled with circulating cooling water and can exchange heat with the outside.

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