Rotor, motor and electric equipment

Abstract

The utility model discloses a rotor, a motor and electric equipment, the rotor comprises a rotor iron core assembly and a pressure difference generation structure, at least one heat exchange flow channel is formed on the rotor iron core assembly, and two ends of the heat exchange flow channel are respectively a heat exchange inlet and a heat exchange outlet; the pressure difference generation structure comprises at least one of a high-pressure generation structure and a low-pressure generation structure, the high-pressure generation structure is arranged adjacent to the heat exchange inlet, and the low-pressure generation structure is arranged adjacent to the heat exchange outlet. Therefore, heat exchange between the interior of the rotor and the cooling medium is realized through the heat exchange flow channel on the rotor iron core assembly, and the pressure difference generation structure effectively drives the cooling medium to continuously flow in the heat exchange flow channel by creating pressure difference at the two ends of the heat exchange flow channel, so that high-efficiency cooling of the rotor is ensured, the initiative and self-adaptability of the cooling system are enhanced, and the service life of the rotor is prolonged. And the heat dissipation efficiency and the overall performance of the motor rotor can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a rotor, a motor and an electrical device. Background Art

[0002] In the prior art, it is difficult for spontaneous axial air flow to form inside the cooling structure of the motor rotor, and the air outlet slot is designed to be too large, resulting in more air entering the air outlet, forming air flow vortex and air flow agitation, thereby increasing the mechanical loss of the rotor, reducing the efficiency of the motor, and greatly reducing the effect of axial circulation and heat dissipation inside the motor rotor core. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a rotor that can improve the heat dissipation efficiency and overall performance of the rotor.

[0004] The second objective of the present invention is to provide a motor, comprising the rotor described in the above embodiment.

[0005] The third objective of the present utility model is to provide an electrical device, comprising the motor described in the above embodiment.

[0006] According to the rotor of the embodiment of the first aspect of the utility model, it includes: a rotor core assembly and a pressure difference generating structure, at least one heat exchange channel is formed on the rotor core assembly, and the two ends of the heat exchange channel are respectively a heat exchange inlet and a heat exchange outlet; the pressure difference generating structure includes at least one of a high pressure generating structure and a low pressure generating structure, the high pressure generating structure is arranged adjacent to the heat exchange inlet, and the low pressure generating structure is arranged adjacent to the heat exchange outlet.

[0007] According to the rotor of the embodiment of the first aspect of the utility model, heat exchange between the inside of the rotor and the cooling medium is achieved through the heat exchange channel on the rotor core assembly, and the pressure difference generating structure effectively drives the cooling medium to flow continuously in the heat exchange channel by creating a pressure difference at both ends of the heat exchange channel, thereby ensuring efficient cooling of the rotor, enhancing the initiative and adaptability of the cooling system, and helping to improve the heat dissipation efficiency and overall performance of the motor rotor.

[0008] In some embodiments, the rotor core assembly includes: a rotor core and a plurality of magnetic isolation plates, the rotor core being formed with at least one heat exchange hole, the heat exchange hole penetrating the rotor core along the axial direction of the rotor core; the plurality of magnetic isolation plates being respectively arranged at both axial ends of the rotor core, the plurality of magnetic isolation plates being respectively formed with the heat exchange inlet and the heat exchange outlet, the heat exchange inlet and the heat exchange outlet being respectively connected with the two axial ends of the heat exchange hole along the rotor core to jointly constitute the heat exchange flow channel.

[0009] In some embodiments, the high-voltage generating structure is a first protrusion provided on the magnetic isolation plate, the first protrusion is arranged adjacent to the heat exchange inlet, and the first protrusion is located on the leeward side of the heat exchange inlet along the rotation direction of the rotor core assembly.

[0010] In some embodiments, the first protrusion is in the shape of a hemisphere, an arch bridge or a cone.

[0011] In some embodiments, the low pressure generating structure is a second protrusion provided on the magnetic isolation plate, the second protrusion is arranged adjacent to the heat exchange outlet, and the second protrusion is located on the windward side of the heat exchange outlet along the rotation direction of the rotor core.

[0012] In some embodiments, along the rotation direction of the rotor core and in a direction away from the heat exchange outlet, the cross-sectional area of ​​the second protrusion gradually decreases.

[0013] In some embodiments, the low pressure generating structure is an air gap formed between the rotor core and the stator core of the motor, and the heat exchange outlet is arranged adjacent to the air gap.

[0014] In some embodiments, a connecting channel is formed between the magnetic isolation plate and the rotor core, the connecting channel extends radially along the rotor core, the connecting channel is connected to the heat exchange hole, and one end of the connecting channel passes through the outer peripheral wall of the rotor core to form the heat exchange outlet.

[0015] In some embodiments, a groove is formed on a surface of the magnetic isolation plate facing the rotor core, and the groove and the rotor core together define the communication channel.

[0016] In some embodiments, there are multiple heat exchange inlets; there are multiple heat exchange holes, and the multiple heat exchange holes are arranged at intervals along the radial direction of the rotor core, one end of the multiple heat exchange holes are respectively connected to the multiple heat exchange inlets, and the other ends of the multiple heat exchange holes are all connected to the connecting channel.

[0017] In some embodiments, there are multiple heat exchange channels, including a first heat exchange channel and a second heat exchange channel, the heat exchange inlet and the heat exchange outlet of the first heat exchange channel and the second heat exchange channel are arranged oppositely along the axial direction of the rotor core, and the first heat exchange channel and the second heat exchange channel are arranged at intervals along the circumferential direction of the rotor core.

[0018] In some embodiments, the heat exchange holes are weight-reducing holes.

[0019] The motor according to the embodiment of the second aspect of the utility model comprises the rotor according to the embodiment of the first aspect of the utility model.

[0020] The electrical equipment according to the embodiment of the third aspect of the utility model comprises the motor according to the embodiment of the second aspect of the utility model.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a cross-sectional schematic diagram of a rotor according to one of the embodiments of the utility model.

[0024] Figure 2 is a cross-sectional schematic diagram of a rotor core assembly according to another embodiment of the utility model

[0025] Figure 3 yes Figure 2 Schematic diagram of the magnetic isolation plate in the illustrated embodiment.

[0026] Figure 4 yes Figure 1 A schematic diagram of a surface of a magnetic isolation plate that is away from a rotor core in the illustrated embodiment.

[0027] Figure 5 yes Figure 1 A schematic diagram of a surface of a magnetic isolation plate adjacent to a rotor core in the illustrated embodiment.

[0028] Figure 6 It is a schematic diagram of a rotor core according to an embodiment of the utility model.

[0029] Reference numerals:

[0030] 100. Rotor;

[0031] 10. rotor core assembly; 11. heat exchange channel; 12. first heat exchange channel; 13. second heat exchange channel;

[0032] 20, rotor core; 21, heat exchange hole; 22, magnetic isolation plate; 221, first magnetic isolation plate; 222, second magnetic isolation plate; 223, heat exchange inlet; 224, heat exchange outlet; 225, groove; 23, connecting channel;

[0033] 30. pressure difference generating structure; 31. high pressure generating structure; 311. first protrusion; 32. low pressure generating structure; 321. second protrusion;

[0034] 40. stator core; 41. air gap;

[0035] 50. Rotating axis. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 6 The rotor 100 according to the embodiment of the present invention is described, including: a rotor core assembly 10 and a pressure difference generating structure 30 .

[0037] Specifically, if Figure 1-Figure 6 As shown, at least one heat exchange channel 11 is formed on the rotor core assembly 10, and the two ends of the heat exchange channel 11 are respectively a heat exchange inlet 223 and a heat exchange outlet 224; the pressure difference generating structure 30 includes at least one of a high pressure generating structure 31 and a low pressure generating structure 32, the high pressure generating structure 31 is arranged adjacent to the heat exchange inlet 223, and the low pressure generating structure 32 is arranged adjacent to the heat exchange outlet 224.

[0038] Combination Figure 1 and Figure 2 , the heat exchange channel 11 serves as a channel for the cooling medium (such as air) to flow inside the rotor 100, and directly participates in the heat exchange process of the rotor 100. A heat exchange inlet 223 and a heat exchange outlet 224 are respectively provided at both ends of the heat exchange channel 11. The cooling medium enters the channel from the heat exchange inlet 223, absorbs the heat of the rotor 100 and flows out from the heat exchange outlet 224, completing a cooling cycle. The pressure difference generating structure 30 is intended to drive the flow of the cooling medium in the rotor 100 by changing the pressure and flow rate of the cooling medium on the surface and inside of the rotor core 20. The high pressure generating structure 31 is arranged adjacent to the heat exchange inlet 223, which helps to form a higher pressure at the heat exchange inlet 223, and pushes the cooling medium into the heat exchange channel 11; or, the low pressure generating structure 32 is arranged adjacent to the heat exchange outlet 224, which helps to form a lower pressure at the heat exchange outlet 224, and accelerates the cooling medium to flow out of the heat exchange channel 11. In this embodiment, the pressure difference generating structure 30 and the low pressure generating structure 32 are provided simultaneously to further increase the flow of the cooling medium between the heat exchange inlet 223, the heat exchange flow channel 11 and the heat exchange outlet 224, thereby increasing heat dissipation.

[0039] According to the rotor 100 of the embodiment of the utility model, heat exchange between the inside of the rotor 100 and the cooling medium is achieved through the heat exchange channel 11 on the rotor core assembly 10, and the pressure difference generating structure 30 effectively drives the cooling medium to continuously flow in the heat exchange channel 11 by creating a pressure difference at both ends of the heat exchange channel 11, thereby ensuring efficient cooling of the rotor 100, enhancing the initiative and adaptability of the cooling system, and helping to improve the heat dissipation efficiency and overall performance of the motor rotor 100.

[0040] According to some embodiments of the present invention, Figure 2 As shown, the rotor core assembly 10 includes: a rotor core 20 and a plurality of magnetic isolation plates 22, the rotor core 20 is formed with at least one heat exchange hole 21, and the heat exchange hole 21 penetrates the rotor core 20 along the axial direction of the rotor core 20; the plurality of magnetic isolation plates 22 are respectively arranged at the axial ends of the rotor core 20, and the plurality of magnetic isolation plates 22 are respectively formed with heat exchange inlets 223 and heat exchange outlets 224, and the heat exchange inlets 223 and the heat exchange outlets 224 are respectively connected with the axial ends of the heat exchange hole 21 along the rotor core 20 to jointly constitute a heat exchange flow channel 11.

[0041] The rotor core 20 extends along the axial direction of the rotor 100, and the heat exchange inlet 223 and the heat exchange outlet 224 are arranged through the magnetic isolation plate 22 along the axial direction of the rotor 100. The magnetic isolation plate 22 includes a first magnetic isolation plate 221 and a second magnetic isolation plate 222. The first magnetic isolation plate 221 is arranged at one end of the rotor core 20 along the axial direction of the rotor 100 and is fixedly connected to the rotor core 20. The first magnetic isolation plate 221 is formed with a heat exchange inlet 223. The second magnetic isolation plate 222 is arranged at the other end of the rotor core 20 along the axial direction of the rotor 100 and is fixedly connected to the rotor core 20. The second magnetic isolation plate 222 is formed with a heat exchange outlet 224. The heat exchange hole 21 extends along the axial direction of the rotor 100, and one end of the heat exchange hole 21 along the axial direction of the rotor 100 is connected to the heat exchange inlet 223 on the first magnetic isolation plate 221, and the other end of the heat exchange hole 21 along the axial direction of the rotor 100 is connected to the heat exchange outlet 224 on the second magnetic isolation plate 222, so as to form a complete heat exchange flow channel 11 along the axial direction of the rotor 100. The heat exchange hole 21 channel provides a path for the cooling medium to directly pass through the rotor core 20, which facilitates the occurrence of heat exchange. A plurality of magnetic isolation plates 22 are respectively arranged at the axial ends of the rotor core 20, which play the role of isolating the magnetic field and guiding the cooling airflow. The rotor core assembly 10 also includes a rotating shaft 50, and the rotor core 20 is sleeved on the rotating shaft 50, and the rotor core 20 rotates around the rotating shaft 50 as the axis.

[0042] Thus, the rotor core assembly 10 is composed of a rotor core 20 and a plurality of magnetic isolation plates 22, and the heat exchange holes 21 on the rotor core 20 are precisely matched with the heat exchange inlet 223 and the heat exchange outlet 224 on the magnetic isolation plates 22, and together construct a heat exchange flow channel 11 along the axial direction of the rotor 100. This design enables the cooling medium to flow smoothly inside the rotor 100, fully contact the rotor core 20, and achieve efficient heat exchange, thereby effectively reducing the temperature of the motor rotor 100 and improving the overall performance and reliability of the motor rotor 100.

[0043] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, the high-voltage generating structure 31 is a first protrusion 311 arranged on the magnetic isolation plate 22 . The first protrusion 311 is arranged adjacent to the heat exchange inlet 223 . The first protrusion 311 is located on the leeward side of the heat exchange inlet 223 along the rotation direction of the rotor core assembly 10 .

[0044] The first protrusion 311 is formed by a portion of the surface of the magnetic isolation plate 22 that is axially away from the rotor core 20 along the rotor 100, protruding in a direction away from the magnetic isolation plate 22. The first protrusion 311 can generate high pressure in a specified area by changing the flow rate and pressure distribution of the cooling medium when it flows through. The first protrusion 311 is arranged adjacent to the heat exchange inlet 223, that is, it is located near the entrance of the cooling medium entering the heat exchange flow channel 11 of the rotor core assembly 10. The first protrusion 311 is located on the leeward side of the heat exchange inlet 223 along the rotation direction of the rotor core assembly 10. When the rotor core assembly 10 rotates along the A direction, the cooling medium moves in the opposite direction of the rotor core 20, that is, the cooling medium flows through the heat exchange inlet 223 and the first protrusion 311 in sequence, so that at least part of the cooling medium needs to impact the first protrusion 311 before entering the heat exchange flow channel 11, thereby forming a high-pressure area at the heat exchange inlet 223. Here, the leeward side refers to the downwind direction along the flow direction of the cooling medium on the axial end face of the rotor 100. The leeward side is relative to the windward side. The windward side is the side where the first protrusion 311 is impacted by the cooling medium, and the leeward side is the side that is not directly impacted by the cooling medium.

[0045] Therefore, the high-voltage generating structure 31 sets a first protrusion 311 on the magnetic isolation plate 22, and utilizes the relative movement between the cooling medium and the first protrusion 311 when the rotor core assembly 10 rotates, especially at a specific position on the leeward side, to effectively increase the local pressure of the cooling medium, thereby forming a high-pressure area at the heat exchange inlet 223, enhancing the power of the cooling medium to enter the heat exchange flow channel 11, ensuring that the cooling medium can flow smoothly inside the rotor core assembly 10 and perform effective heat exchange, thereby improving the cooling efficiency of the motor rotor 100.

[0046] According to some embodiments of the present invention, Figure 2-Figure 4 As shown, the shape of the first protrusion 311 is hemispherical, arched or conical.

[0047] The first protrusion 311 is hemispherical in shape, with a smooth curved surface and symmetrical geometric characteristics. When the cooling medium flows through the hemispherical protrusion, it can evenly disperse the pressure of the fluid. At the same time, due to its continuous curved surface transition, it can reduce the generation of turbulence, reduce flow resistance, reduce energy loss to a certain extent, and may provide a relatively stable high-pressure area generation effect. The first protrusion 311 is in the shape of an arch bridge. The arch bridge shape here refers to only the arched surface, rather than a complete bridge structure. The top is arched, and the two sides are connected to the plane of the magnetic isolation plate 22. The arch design can guide the cooling medium to converge below it, forming a high-pressure area below the first protrusion 311. The conical first protrusion 311 causes the cooling medium to gradually shrink the flow beam when flowing through the first protrusion 311, increasing the flow rate and increasing the pressure.

[0048] Therefore, the shape of the first protrusion 311, whether hemispherical, arch-bridge or conical, can change the flow direction of the cooling medium and form a high-pressure area at the heat exchange inlet 223, and the setting position of the first protrusion 311 can avoid each first protrusion 311 being in a vortex area formed by the separation of the airflow caused by the structure of the previous first protrusion 311, thereby reducing the wind friction loss caused by the first protrusion 311 of the magnetic isolation plate 22.

[0049] According to some embodiments of the present invention, Figure 2 and Figure 3 As shown, the low pressure generating structure 32 is a second protrusion 321 provided on the magnetic isolation plate 22 . The second protrusion 321 is provided adjacent to the heat exchange outlet 224 . The second protrusion 321 is located on the windward side of the heat exchange outlet 224 along the rotation direction of the rotor core 20 .

[0050] According to an embodiment of the present invention, specifically, in combination Figure 2 and Figure 3 The low pressure generating structure 32 is a second protrusion 321 provided on the magnetic isolation plate 22. The second protrusion 321 is formed by a portion of the surface of the magnetic isolation plate 22 that is away from the rotor core 20 along the axial direction of the rotor 100 and protrudes in the direction away from the magnetic isolation plate 22, and is arranged close to the heat exchange outlet 224. The second protrusion 321 is located on the windward side of the heat exchange outlet 224 along the rotation direction of the rotor core 20. When the rotor core 20 rotates along the A direction, the cooling medium flows in the direction opposite to the rotation direction of the rotor core 20, that is, the cooling medium first passes through the second protrusion 321 and then passes through the heat exchange outlet 224. The second protrusion 321 can effectively block or disturb the flow of the cooling medium, so that the flow rate of the cooling medium is forced to slow down when passing through the second protrusion 321, thereby forming a relatively low pressure area around the second protrusion 321.

[0051] Thus, the second protrusion 321 serves as a low-pressure generating structure 32. By adjusting the shape, size, and distance of the second protrusion 321 from the heat exchange outlet 224, the velocity distribution and direction of the cooling medium leaving the heat exchange flow channel 11 can be accurately controlled to avoid direct impact on the external structure or unnecessary vibration, which helps to achieve smooth and efficient airflow discharge. The blocking and guiding effect of the second protrusion 321 on the flow of the cooling medium is intended to create a low-pressure environment that is conducive to enhancing the heat exchange effect and ensuring the stability of the system, and to effectively manage the airflow at the heat exchange outlet 224.

[0052] According to some embodiments of the present invention, Figure 3 As shown, along the rotation direction of the rotor core 20 and in the direction away from the heat exchange outlet 224 , the cross-sectional area of ​​the second protrusion 321 gradually decreases.

[0053] The cross-sectional area of ​​the second protrusion 321 gradually decreases, which helps to build a natural flow velocity acceleration zone near the heat exchange outlet 224, so that an accelerated flow is formed near the second protrusion 321, and the ability to induce a low pressure zone on the windward side of the second protrusion 321 is enhanced. Since the fluid is subjected to a greater acceleration effect when passing through the position with a larger cross-sectional area of ​​the second protrusion 321, its relative velocity with the surface of the second protrusion 321 increases, resulting in a more significant pressure drop at the heat exchange inlet 223.

[0054] Therefore, the setting position and shape design of the second protrusion 321 further enhance the effect of the second protrusion 321 in forming a low-pressure zone near the heat exchange outlet 224, which helps to improve the heat exchange efficiency and prevent backflow, and endows the low-pressure generating structure 32 with better fluid acceleration, low-pressure zone induction, resistance reduction and adaptive adjustment functions, which is of positive significance to improving the efficiency and stability of the entire motor rotor 100 cooling system.

[0055] That is Figure 2 and Figure 3In the illustrated embodiment, the cooling medium enters the heat exchange channel 11 through the heat exchange inlet 223 on the first magnetic isolation plate 221 at one end of the rotor core 20. When the rotor core assembly 10 rotates along direction A, the cooling medium enters the heat exchange channel 11 after impacting the first protrusion 311. The setting of the first protrusion 311 forms a high-pressure area at the heat exchange inlet 223, which can accelerate the cooling medium to enter the heat exchange channel 11. After the cooling medium flows through the heat exchange hole 21, it flows out of the heat exchange channel 11 through the heat exchange outlet 224 on the second magnetic isolation plate 222 at the other end of the rotor core 20. Due to the rotation of the rotor core 20 and the setting of the second protrusion 321 on the second magnetic isolation plate 222, the flow rate of the cooling medium outside the rotor core 20 slows down when passing through the second protrusion 321, thereby forming a low-pressure area at the heat exchange outlet 224, so that the cooling medium in the heat exchange channel 11 can flow out of the heat exchange channel 11 more efficiently and smoothly through the heat exchange outlet 224, thus completing a cooling cycle. The setting of the first protrusion 311 and the second protrusion 321 can increase the flow rate of the cooling medium in the heat exchange channel 11, thereby increasing the heat exchange efficiency of the heat exchange medium to the rotor core 20.

[0056] According to some embodiments of the present invention, Figure 1 As shown, the low pressure generating structure 32 is an air gap 41 formed between the rotor core 20 and the stator core 40 of the motor, and the heat exchange outlet 224 is arranged adjacent to the air gap 41 .

[0057] According to another embodiment of the utility model, combined with Figure 1 The low-pressure generating structure 32 is formed as an air gap 41 between the rotor core 20 and the stator core 40 of the motor. The air gap 41 is a non-contact gap area between the rotor core 20 and the stator core 40. The gas density inside is usually lower than that of the surrounding enclosed space (such as the inside of the motor housing). Therefore, when there is no external force, the air gap 41 itself has a certain low-pressure characteristic. This natural low-pressure environment is conducive to the rapid diffusion of the cooling medium after leaving the heat exchange outlet 224, reducing the local pressure and forming a low-pressure area.

[0058] Therefore, the heat exchange outlet 224 is arranged adjacent to the air gap 41, and the cooling medium can directly enter the air gap 41 after flowing out of the heat exchange outlet 224. The flow rate of the cooling medium in the air gap 41 is reduced and the residence time is increased, which is conducive to more sufficient heat exchange with the surrounding stator core 40, rotor core 20, etc., further reducing the internal temperature of the rotor 100, and facilitating the diversion of the heat exchange medium after it flows out, thereby increasing the flow rate of the heat exchange medium, and improving the flow efficiency of the heat exchange medium, thereby improving the overall performance of the rotor 100 to a certain extent.

[0059] According to some embodiments of the present invention, Figure 1 , Figure 4 and Figure 5As shown, a connecting channel 23 is formed between the magnetic isolation plate 22 and the rotor core 20. The connecting channel 23 extends radially along the rotor core 20. The connecting channel 23 is connected to the heat exchange hole 21. One end of the connecting channel 23 passes through the outer peripheral wall of the rotor core 20 to form a heat exchange outlet 224.

[0060] One axial end of the heat exchange hole 21 is connected to the heat exchange inlet 223, and the other axial end of the heat exchange hole 21 is connected to one radial end of the connecting channel 23. The other radial end of the connecting channel 23 is formed as a heat exchange outlet 224. The cooling medium enters from the heat exchange inlet 223 and flows through the heat exchange hole 21 on the rotor core 20. After absorbing the heat of the rotor 100, the cooling medium flows out from the heat exchange outlet 224 of the connecting channel 23, completing a cooling cycle.

[0061] Thus, the connecting channel 23 is connected to the heat exchange hole 21 and extends along the radial direction of the rotor core 20, so that the cooling medium can not only flow in the axial direction of the rotor core 20 and perform heat exchange, but also increase the contact area in the radial direction, thereby improving the overall heat exchange efficiency. One end of the connecting channel 23 passes through the outer peripheral wall of the rotor core 20 to form a heat exchange outlet 224, so that the heat exchange outlet 224 can be set in the air gap 41, which is beneficial to optimize the structural design of the rotor core assembly 10, improve the integration of the rotor core assembly 10, and improve the overall heat dissipation performance of the rotor 100.

[0062] According to some embodiments of the present invention, Figure 1 and Figure 5 As shown, a groove 225 is formed on the surface of the magnetic isolation plate 22 facing the rotor core 20 , and a communication channel 23 is defined between the groove 225 and the rotor core 20 .

[0063] A groove 225 is formed on the surface of one side of the magnetic isolation plate 22 adjacent to the rotor core 20 along the axial direction of the rotor 100. The groove 225 is formed by a portion of the surface of the magnetic isolation plate 22 being recessed in a direction away from the rotor core 20. The groove 225 extends in a radial direction of the rotor core 20 in a direction away from the center of the rotor core 20. One end of the groove 225 radially close to the center of the rotor core 20 is connected to the other end of the heat exchange hole 21 in the axial direction, and the other end of the groove 225 radially away from the center of the rotor core 20 passes through the outer peripheral wall of the rotor core 20.

[0064] Therefore, by forming a groove 225 on the side surface of the magnetic isolation plate 22 facing the rotor core 20, a connecting channel 23 is defined together with the rotor core 20. This design has the advantages of precise control of channel size, easy assembly and maintenance, etc., which helps to improve the performance and reliability of the cooling system of the motor rotor 100.

[0065] That is, Figure 1 , Figure 4 and Figure 5In the illustrated embodiment, the cooling medium enters the heat exchange channel 11 from the heat exchange inlet 223 on the magnetic isolation plate 22 at one end of the rotor core 20. When the rotor core 20 assembly rotates in the A direction, the cooling medium enters the heat exchange channel 11 after impacting the first protrusion 311. The first protrusion 311 is set to form a high-pressure area at the heat exchange inlet 223, which can accelerate the cooling medium to enter the heat exchange channel 11. After the cooling medium flows through the heat exchange hole 21, it flows out of the heat exchange channel 11 through the connecting channel 23 and the heat exchange outlet 224, and flows toward the air gap 41, completing a cooling cycle. The low-pressure characteristics of the air gap 41 itself are conducive to the rapid diffusion of the cooling medium flowing out of the heat exchange outlet 224, increasing the flow rate of the heat exchange medium when it flows out of the heat exchange outlet 224, and thereby improving the flow efficiency of the heat exchange medium.

[0066] According to some embodiments of the present invention, Figure 1 As shown, there are multiple heat exchange inlets 223; there are multiple heat exchange holes 21, and the multiple heat exchange holes 21 are arranged at intervals along the radial direction of the rotor core 20, one end of the multiple heat exchange holes 21 is respectively connected to the multiple heat exchange inlets 223, and the other ends of the multiple heat exchange holes 21 are all connected to the connecting channel 23.

[0067] There are multiple heat exchange inlets 223, and the cooling medium can enter the rotor core 20 through the multiple heat exchange inlets 223 to achieve multi-point air intake, which helps to improve the distribution uniformity and cooling efficiency of the cooling medium. There are also multiple heat exchange holes 21, which are arranged at intervals along the radial direction of the rotor core 20. This arrangement is conducive to the uniform distribution of the cooling medium in the radial direction of the rotor core 20, improving the heat exchange efficiency, and is also conducive to reducing local thermal stress and improving the mechanical stability of the rotor core 20. One end of each heat exchange hole 21 is connected to a heat exchange inlet 223, and the other ends of multiple heat exchange holes 21 are connected to the connecting channel 23, that is, the cooling medium corresponding to each heat exchange inlet 223 flows through the corresponding heat exchange hole 21, and then merges into the same connecting channel 23, and finally flows out of the rotor core 20 from the heat exchange outlet 224 of the connecting channel 23, forming an integrated cooling medium flow path, which helps to simplify the structure of the rotor core 20.

[0068] As a result, the rotor 100 cooling system realizes multi-point air intake, radial uniform cooling and integrated flow path, which helps to improve cooling efficiency, reduce the temperature of the rotor core 20, and simplify the system design and manufacturing process.

[0069] According to some embodiments of the present invention, Figure 1As shown, there are multiple heat exchange channels 11, and the multiple heat exchange channels 11 include a first heat exchange channel 12 and a second heat exchange channel 13. The heat exchange inlet 223 and the heat exchange outlet 224 of the first heat exchange channel 12 and the second heat exchange channel 13 are arranged oppositely along the axial direction of the rotor core 20, and the first heat exchange channel 12 and the second heat exchange channel 13 are arranged at intervals along the circumferential direction of the rotor core 20.

[0070] The cooling medium of the first heat exchange flow channel 12 flows in from one end of the rotor core 20 and flows out from the other end; while the cooling medium of the second heat exchange flow channel 13 flows in from the other end of the rotor core 20 and flows out from one end. This design of opposite inlet and outlet directions helps the cooling medium to form convection in the axial direction of the rotor core 20, thereby improving the heat exchange efficiency. The first heat exchange flow channel 12 and the second heat exchange flow channel 13 are arranged at intervals along the circumference of the rotor core 20. This arrangement helps to evenly distribute the cooling medium in the circumferential direction of the rotor core 20, further improving the cooling effect.

[0071] Therefore, the rotor 100 includes a plurality of heat exchange channels 11, including a first heat exchange channel 12 and a second heat exchange channel 13 having a heat exchange inlet 223 and a heat exchange outlet 224, which are oppositely arranged along the axial direction of the rotor core 20, and are arranged at intervals along the circumferential direction of the rotor core 20, so that the airflows will not interfere with each other, reduce wind friction loss to a certain extent, and realize a cooling mode of axial convection of the cooling medium and circumferential uniform cooling, thereby effectively improving the cooling efficiency of the rotor 100 and the mechanical stability of the rotor core 20.

[0072] Optionally, at least one heat exchange inlet 223 is opposite to multiple heat exchange channels 11, and the cooling medium entering from one heat exchange inlet 223 can enter multiple heat exchange channels 11 at the same time, increasing the flow rate of the cooling medium at the heat exchange inlet 223, further increasing the cross-sectional area of ​​the heat exchange channel 11, and realizing a lightweight design of the rotor 100.

[0073] According to some embodiments of the present invention, Figure 6 As shown, the heat exchange hole 21 is a weight-reducing hole.

[0074] The heat exchange holes 21 and the weight reduction holes are of the same structure, and they have the dual functions of heat exchange and reducing the weight of the rotor 100. The weight reduction holes are also used as heat exchange holes 21, which realizes the integration of structural functions, can reduce the additional space and materials required for the separate setting of the heat exchange holes 21, and help to reduce the overall weight of the motor rotor 100. The weight reduction holes and the heat exchange holes 21 are combined into one, which simplifies the internal structural design of the motor rotor 100, can reduce manufacturing complexity, reduce potential failure points, and improve system reliability. Therefore, the heat exchange holes 21 and the weight reduction holes are combined into the same structure, which realizes the multi-functional integration of the rotor 100, the structural simplification, and the optimization of the cooling efficiency, which is conducive to improving the overall performance and operating efficiency of the rotor 100.

[0075] The motor according to the second embodiment of the utility model includes the rotor 100 according to the first embodiment of the utility model.

[0076] According to the motor of the embodiment of the utility model, by applying the rotor 100 described in the above embodiment, its built-in high-efficiency cooling system can effectively reduce the temperature of the rotor core 20, reduce heat loss, and improve the thermal efficiency of the motor, thereby helping to improve the overall performance and operating stability of the motor. The simplified internal structure and multifunctional integration of the rotor 100 reduce potential failure points, help improve the operating reliability and maintenance convenience of the motor, and extend its service life.

[0077] The electrical equipment according to the embodiment of the third aspect of the utility model includes the motor according to the embodiment of the second aspect of the utility model.

[0078] According to the electric equipment of the embodiment of the utility model, the efficient cooling design in the motor enables the electric equipment to maintain a low and stable internal temperature during operation, avoiding performance degradation or equipment failure due to overheating, and enhancing the stability and durability of the equipment. The use of a motor with a lightweight design reduces the overall weight of the electric equipment, simplifies the internal structure of the motor, and reduces the number of failure points, which not only improves the operational reliability of the electric equipment, but also simplifies the operating process and shortens the downtime when repair or maintenance is required, which is conducive to improving the availability of the electric equipment and reducing maintenance costs.

[0079] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0080] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0082] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rotor, characterized in that: include: A rotor core assembly, wherein at least one heat exchange channel is formed on the rotor core assembly, and two ends of the heat exchange channel are respectively a heat exchange inlet and a heat exchange outlet; A pressure difference generating structure, wherein the pressure difference generating structure comprises at least one of a high pressure generating structure and a low pressure generating structure, wherein the high pressure generating structure is arranged adjacent to the heat exchange inlet, and the low pressure generating structure is arranged adjacent to the heat exchange outlet.

2. The rotor according to claim 1, characterized in that The rotor core assembly comprises: A rotor core, wherein the rotor core is formed with at least one heat exchange hole, and the heat exchange hole penetrates the rotor core along the axial direction of the rotor core; A plurality of magnetic isolation plates are respectively arranged at the axial ends of the rotor core, and the heat exchange inlet and the heat exchange outlet are respectively formed on the plurality of magnetic isolation plates. The heat exchange inlet and the heat exchange outlet are respectively connected with the axial ends of the heat exchange hole along the rotor core to jointly constitute the heat exchange flow channel.

3. The rotor according to claim 2, characterized in that The high-voltage generating structure is a first protrusion disposed on the magnetic isolation plate, the first protrusion is disposed adjacent to the heat exchange inlet, and the first protrusion is located on the leeward side of the heat exchange inlet along the rotation direction of the rotor core assembly.

4. The rotor according to claim 3, characterized in that The first protrusion has a hemispherical shape, an arch bridge shape or a conical shape.

5. The rotor according to claim 2, characterized in that The low pressure generating structure is a second protrusion provided on the magnetic isolation plate, the second protrusion is provided adjacent to the heat exchange outlet, and the second protrusion is located on the windward side of the heat exchange outlet along the rotation direction of the rotor core.

6. The rotor according to claim 5, characterized in that Along the rotation direction of the rotor core and in a direction away from the heat exchange outlet, the cross-sectional area of ​​the second protrusion gradually decreases.

7. The rotor according to claim 2, characterized in that The low pressure generating structure is an air gap formed between the rotor core and the stator core of the motor, and the heat exchange outlet is arranged adjacent to the air gap.

8. The rotor according to claim 2, characterized in that A connecting channel is formed between the magnetic isolation plate and the rotor core. The connecting channel extends radially along the rotor core. The connecting channel is connected to the heat exchange hole. One end of the connecting channel passes through the outer peripheral wall of the rotor core to form the heat exchange outlet.

9. The rotor according to claim 8, characterized in that A groove is formed on a surface of the magnetic isolation plate facing the rotor core, and the groove and the rotor core together define the communication channel.

10. The rotor according to claim 8, characterized in that There are multiple heat exchange inlets; There are multiple heat exchange holes, which are arranged at intervals along the radial direction of the rotor core, one end of the multiple heat exchange holes is respectively connected to the multiple heat exchange inlets, and the other ends of the multiple heat exchange holes are all connected to the connecting channel.

11. The rotor according to claim 2, characterized in that There are multiple heat exchange channels, including a first heat exchange channel and a second heat exchange channel. The heat exchange inlet and the heat exchange outlet of the first heat exchange channel and the second heat exchange channel are arranged oppositely along the axial direction of the rotor core, and the first heat exchange channel and the second heat exchange channel are arranged at intervals along the circumferential direction of the rotor core.

12. The rotor according to any one of claims 2 to 11, characterized in that: The heat exchange holes are weight-reducing holes.

13. A motor, characterized in that: Comprising the rotor as claimed in claim 12.

14. An electrical device, characterized in that: Including the motor as claimed in claim 13.

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