Rotor structure, electric machine and centrifuge

Abstract

The application provides a rotor structure, a motor and a centrifugal machine, and the rotor structure comprises a rotor body, the rotor body comprises a main body part and a sheath sleeved on the main body part, the main body part comprises a magnetic steel, the sheath is sleeved on the magnetic steel, the rotor body has an inlet, an outlet and a communication channel, a first end of the communication channel is communicated with the inlet, and a second end of the communication channel is communicated with the outlet; wherein the communication channel is arranged between the magnetic steel and the sheath, so that the gas flowing through the communication channel radiates the outer wall of the magnetic steel, and the rotor structure of the application solves the problem of difficult heat dissipation of the magnetic steel in the rotor structure in the prior art.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically, to a rotor structure, a motor, and a centrifuge. Background Technology

[0002] High-speed permanent magnet synchronous motors have advantages such as small size, high power density, and high motor efficiency, and are widely used in the centrifuge field. Small-power high-speed centrifuges generally use a combined rotor, that is, ring or circular magnets as the rotor magnetic field, front and rear short shafts as bearing supports, and then a high-strength sheath is sleeved on the outer circle of the magnets and connected to the front and rear short shafts to form a combined shaft rotor.

[0003] However, the aforementioned combined shaft rotor has the following drawbacks:

[0004] When the motor is running, the heat generated by the eddy currents on the surface of the magnets inside the rotor cannot be dissipated in time. The difficulty in heat dissipation of the magnets inside the rotor may cause demagnetization of the rotor magnets, resulting in poor motor performance or even failure.

[0005] When the rotor sheath is assembled using a heat-shrink process, internal "air trapping" can easily occur, meaning that the internal gas is not easily discharged, leading to the formation of condensate, which oxidizes the surface of the magnets and reduces their magnetic properties. It can also cause instability in the rotor's axial dimensions, resulting in unstable motor operation and increased rotor axial movement. Summary of the Invention

[0006] The main objective of this invention is to provide a rotor structure, a motor, and a centrifuge to solve the problem of heat dissipation difficulties for the magnets in the rotor structure in the prior art.

[0007] To achieve the above objectives, according to a first aspect of the present invention, a rotor structure is provided, comprising a rotor body, the rotor body including a main body portion and a sheath sleeved on the main body portion, the main body portion including a magnet, the sheath sleeved on the magnet, the rotor body having an inlet, an outlet and a connecting channel, a first end of the connecting channel being connected to the inlet, and a second end of the connecting channel being connected to the outlet; wherein, a connecting channel is provided between the magnet and the sheath to allow gas flowing through the connecting channel to dissipate heat from the outer wall of the magnet.

[0008] Furthermore, the connecting channel includes multiple annular channels, each annular channel being arranged around the axis of the rotor body; the rotor body also includes multiple annular partitions, each annular partition being arranged around the axis of the rotor body; the multiple annular channels and multiple annular partitions are arranged alternately along the axial direction of the rotor body, so that any two adjacent annular channels among the multiple annular channels are separated by the annular partitions; wherein, each annular partition is provided with an opening, so that the annular channels on both sides of the annular partition are connected through the opening.

[0009] Furthermore, any two adjacent annular partitions among the plurality of annular partitions each include a first annular partition and a second annular partition, and the openings on the first annular partition and the openings on the second annular partition are staggered along the circumferential direction of the rotor body.

[0010] Furthermore, the projections of at least two openings on any two adjacent annular partitions in the plurality of annular partitions onto the projection plane are uniformly arranged along the circumferential direction of the rotor body; wherein, the projection plane is set perpendicular to the axial direction of the rotor body.

[0011] Furthermore, each annular partition is provided with an opening, and the projections of the two openings on any two adjacent annular partitions on the projection plane are set at an angle of 180° along the circumferential direction of the rotor body.

[0012] Furthermore, each annular partition has two openings, and the two openings on each annular partition are set at a 180° angle along the circumferential direction of the rotor body; the projections of each opening on the first annular partition onto the projection plane and the projections of each opening on the second annular partition onto the projection plane are set at a 90° angle along the circumferential direction of the rotor body.

[0013] Furthermore, the rotor body has multiple connecting channels, including a first connecting channel, a second connecting channel, and a third connecting channel, which are sequentially connected. The end of the first connecting channel furthest from the second connecting channel is connected to the inlet, and the end of the third connecting channel furthest from the second connecting channel is connected to the outlet. The rotor body also includes a first connecting shaft and a second connecting shaft, which are located on opposite sides of the magnet. A sheath is fitted onto the first connecting shaft and the second connecting shaft. The first connecting channel is located between the sheath and the first connecting shaft, the second connecting channel is located between the sheath and the magnet, and the third connecting channel is located between the sheath and the second connecting shaft.

[0014] Furthermore, the magnet has multiple first grooves and multiple first protrusions, which are alternately arranged sequentially along the axial direction of the rotor body. Each first groove is an annular channel, and each first protrusion is an annular partition. The first connecting shaft has multiple second grooves and multiple second protrusions, which are alternately arranged sequentially along the axial direction of the rotor body. Each second groove is an annular channel, and each second protrusion is an annular partition. The second connecting shaft has multiple third grooves and multiple third protrusions, which are alternately arranged sequentially along the axial direction of the rotor body. Each third groove is an annular channel, and each third protrusion is an annular partition. Each first protrusion, each second protrusion, and each third protrusion is in contact with the inner wall of the sheath. And / or, the end of the first connecting shaft that is in contact with the magnet has a second groove. And / or, the end of the second connecting shaft that is in contact with the magnet has a third groove.

[0015] Furthermore, the sheath is provided with a plurality of fourth grooves and a plurality of fourth protrusions, which are arranged alternately along the axial direction of the rotor body. Each fourth groove is an annular channel and each fourth protrusion is an annular partition. Each fourth protrusion is in contact with one of the magnet, the first connecting shaft, and the second connecting shaft.

[0016] Furthermore, the inlet is located on the sheath; and / or, the outlet is located on the sheath.

[0017] According to a second aspect of the present invention, an electric motor is provided, comprising the rotor structure described above.

[0018] According to a third aspect of the present invention, a centrifuge is provided, comprising the motor described above.

[0019] The rotor structure of this invention includes a rotor body, which comprises a main body and a sheath. The main body includes magnets. The rotor body has an inlet, an outlet, and a connecting channel. The first end of the connecting channel is connected to the inlet, and the second end of the connecting channel is connected to the outlet. Cold air flows into the connecting channel inside the rotor body through the inlet, where it exchanges heat with the magnets, cooling the outer wall of the magnets from inside the rotor body. The cooled air then flows out of the rotor body from the outlet. By setting the inlet and outlet, the internal and external connections of the rotor body are achieved. The connecting channel between the magnets and the sheath allows external cold air to directly dissipate heat from the outer wall of the magnets inside the rotor body, improving the heat dissipation efficiency of the magnets. This solves the problem of difficult heat dissipation of magnets in existing rotor structures, preventing magnet demagnetization and deterioration of motor performance. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 A schematic diagram of an embodiment of the rotor structure according to the present invention is shown;

[0022] Figure 2 A cross-sectional view of an embodiment of the rotor structure according to the present invention is shown;

[0023] Figure 3 A side view of an embodiment of the rotor structure according to the present invention is shown;

[0024] Figure 4 A schematic diagram of the magnet is shown in the first embodiment of the rotor structure according to the present invention (the opening is the first embodiment);

[0025] Figure 5 A side view of the magnet according to a first embodiment of the rotor structure of the present invention is shown;

[0026] Figure 6 A front view of the magnet according to a first embodiment of the rotor structure of the present invention is shown;

[0027] Figure 7 It shows Figure 6 Sectional view at section DD;

[0028] Figure 8 A schematic diagram of a first connecting shaft and a second connecting shaft according to a first embodiment of the rotor structure of the present invention is shown;

[0029] Figure 9 A front view of the first connecting shaft and the second connecting shaft according to a first embodiment of the rotor structure of the present invention is shown;

[0030] Figure 10 It shows Figure 9 Sectional view at section EE;

[0031] Figure 11 A side view of the first connecting shaft and the second connecting shaft according to a first embodiment of the rotor structure of the present invention is shown;

[0032] Figure 12 A cross-sectional view of the first connecting shaft and the second connecting shaft according to a first embodiment of the rotor structure of the present invention is shown;

[0033] Figure 13 A schematic diagram of the magnet is shown in a second embodiment of the rotor structure according to the present invention (the opening is a second implementation).

[0034] Figure 14 A top view of the magnet according to a second embodiment of the rotor structure of the present invention is shown;

[0035] Figure 15 A side view of the magnet according to a second embodiment of the rotor structure of the present invention is shown;

[0036] Figure 16 A front view of the magnet according to a second embodiment of the rotor structure of the present invention is shown;

[0037] Figure 17 It shows Figure 16 Sectional view at the C-section;

[0038] Figure 18 A schematic diagram of the first connecting shaft and the second connecting shaft according to a second embodiment of the rotor structure of the present invention is shown;

[0039] Figure 19 A side view of the first connecting shaft and the second connecting shaft according to a second embodiment of the rotor structure of the present invention is shown;

[0040] Figure 20 A cross-sectional view of the first connecting shaft and the second connecting shaft according to a second embodiment of the rotor structure according to the present invention is shown;

[0041] Figure 21 It shows Figure 20 Sectional view at section AA;

[0042] Figure 22 A schematic diagram of the sheath is shown when the connecting channel of the rotor structure according to the present invention is in the first embodiment;

[0043] Figure 23 A right view of the sheath is shown when the connecting channel of the rotor structure according to the invention is in the first embodiment;

[0044] Figure 24 A left view of the sheath is shown when the connecting channel of the rotor structure according to the invention is in the first embodiment;

[0045] Figure 25 A cross-sectional view of the sheath is shown when the connecting channel of the rotor structure according to the invention is in the first embodiment;

[0046] Figure 26 A cross-sectional view of the sheath is shown when the connecting channel of the rotor structure according to the present invention is a second embodiment;

[0047] Figure 27 A side view of the sheath is shown when the connecting channel of the rotor structure according to the invention is in the second embodiment.

[0048] The above figures include the following reference numerals:

[0049] 10. Rotor body; 11. Main body; 111. Magnet; 12. Sheath; 13. Inlet; 14. Outlet; 15. Connecting channel; 151. First connecting channel; 152. Second connecting channel; 153. Third connecting channel; 154. Annular channel; 16. Annular partition; 161. Opening; 17. First connecting shaft; 18. Second connecting shaft. Detailed Implementation

[0050] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0051] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0052] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0053] This invention provides a rotor structure, please refer to... Figures 1 to 27 The rotor body 10 includes a main body 11 and a sheath 12 fitted on the main body 11. The main body 11 includes a magnet 111, and the sheath 12 is fitted on the magnet 111. The rotor body 10 has an inlet 13, an outlet 14 and a connecting channel 15. The first end of the connecting channel 15 is connected to the inlet 13, and the second end of the connecting channel 15 is connected to the outlet 14. The connecting channel 15 is provided between the magnet 111 and the sheath 12 so that the gas flowing through the connecting channel 15 can dissipate heat from the outer wall of the magnet 111.

[0054] The rotor structure of the present invention includes a rotor body 10, which includes a main body 11 and a sheath 12. The main body 11 includes magnets 111. The rotor body 10 has an inlet 13, an outlet 14, and a connecting channel 15. The first end of the connecting channel 15 is connected to the inlet 13, and the second end of the connecting channel 15 is connected to the outlet 14. Cold air flows into the connecting channel 15 inside the rotor body 10 through the inlet 13, and the cold air exchanges heat with the magnets 111, cooling the outer wall of the magnets 111 from inside the rotor body 10. Then, the cooled air that has completed the heat exchange flows out of the rotor body 10 from the outlet 14. The connection between the inside and outside of the rotor body 10 is achieved by setting the inlet 13 and the outlet 14. A connecting channel 15 is set between the magnet 111 and the sheath 12, so that the external cooled air can directly dissipate heat to the outer wall of the magnet 111 inside the rotor body 10 through the connecting channel 15, thereby improving the heat dissipation efficiency of the magnet 111. This solves the problem of difficult heat dissipation of the magnet in the rotor structure in the prior art and avoids demagnetization of the magnet 111 and deterioration of motor performance.

[0055] Specifically, when there is no external force, the internal air pressure and external air pressure of the rotor body 10 can be considered equal. When the motor is running, the temperature of the rotor body 10 increases, the internal air pressure of the rotor body 10 increases, and the internal hot air will be discharged to the outside of the rotor body 10 from the inlet 13 and the outlet 14. The internal gas of the rotor body 10 becomes rarefied, and the external cold air will enter the rotor body from the inlet 13. This cycle repeats, thus achieving the cooling of the rotor body 10.

[0056] Specifically, the connecting channel 15 includes multiple annular channels 154, each annular channel 154 being arranged around the axis of the rotor body 10; the rotor body 10 also includes multiple annular partitions 16, each annular partition 16 being arranged around the axis of the rotor body 10; the multiple annular channels 154 and the multiple annular partitions 16 are arranged alternately along the axial direction of the rotor body 10, so that any two adjacent annular channels 154 are separated by the annular partitions 16; wherein, each annular partition 16 is provided with an opening 161, so that the annular channels 154 on both sides of the annular partition 16 are connected through the opening 161.

[0057] In specific implementation, any two adjacent annular channels 154 among the multiple annular channels 154 are separated by annular partitions 16. The annular channels 154 on both sides of the annular partitions 16 are connected by openings 161, so that cold air can flow through each annular channel 154 through each opening 161. The setting of openings 161 ensures the connection of all annular channels 154, ensuring that cold air can flow fully between the magnet 111 and the sheath 12, further ensuring the heat dissipation effect of cold air on the magnet 111.

[0058] Specifically, any two adjacent annular partitions 16 among the plurality of annular partitions 16 each include a first annular partition and a second annular partition, and the openings 161 on the first annular partition and the openings 161 on the second annular partition are staggered along the circumferential direction of the rotor body 10.

[0059] In specific implementation, the openings 161 on the first annular partition and the second annular partition are staggered along the circumferential direction of the rotor body 10. This allows the cold air to flow from the opening 161 on the first annular partition into the annular channel 154 between the first and second annular partitions. After flowing a certain distance around the axis of the rotor body 10 (also around the main body 11), the cold air needs to flow out of the annular channel 154 through the opening 161 on the second annular partition. This further ensures that the cold air can flow fully between the magnet 111 and the sheath 12, and further ensures the heat dissipation effect of the cold air on the magnet 111.

[0060] Specifically, the projections of at least two openings 161 on any two adjacent annular partitions 16 in the plurality of annular partitions 16 onto the projection plane are uniformly arranged along the circumferential direction of the rotor body 10; wherein, the projection plane is arranged perpendicular to the axial direction of the rotor body 10. This arrangement ensures that the cold air flows rapidly through the plurality of annular channels 154.

[0061] In specific implementation, the openings 161 on each annular partition 16 can be provided in two ways, specifically:

[0062] In the first implementation, such as Figures 4 to 12 As shown, each annular partition 16 is provided with an opening 161, and the projections of the two openings 161 on any two adjacent annular partitions 16 on the projection plane are arranged at a 180° angle along the circumferential direction of the rotor body 10. This arrangement ensures that after cold air flows into the annular channel 154 from one opening 161, it needs to flow 180° along the circumferential direction of the main body 11 within the annular channel 154 before it can flow out from the other opening 161, further ensuring that the cold air can fully dissipate heat from the magnet 111.

[0063] In the second implementation, such as Figures 13 to 21As shown, each annular partition 16 is provided with two openings 161, and the two openings 161 on each annular partition 16 are arranged at a 180° angle along the circumferential direction of the rotor body 10; the projections of each opening 161 on the first annular partition and the projections of each opening 161 on the second annular partition are arranged at a 90° angle along the circumferential direction of the rotor body 10. This arrangement ensures that after the cold air flows into the annular channel 154 from the openings 161 on the first annular partition, it needs to flow 90° along the circumferential direction of the annular body 11 within the annular channel 154 before it can flow out from the openings 161 on the second annular partition, further ensuring that the cold air can fully dissipate heat from the magnet 111.

[0064] Specifically, such as Figures 4 to 21 As shown, the rotor body 10 has multiple connecting channels 15, including a first connecting channel 151, a second connecting channel 152, and a third connecting channel 153. These channels are sequentially connected. The end of the first connecting channel 151 furthest from the second connecting channel 152 is connected to the inlet 13, and the end of the third connecting channel 153 furthest from the second connecting channel 152 is connected to the outlet 14. The rotor body 10 also includes a first connecting shaft 17 and a second connecting shaft 18, located on opposite sides of the magnet 111. A sheath 12 is fitted onto the first connecting shaft 17 and the second connecting shaft 18. The first connecting channel 151 is located between the sheath 12 and the first connecting shaft 17, the second connecting channel 152 is located between the sheath 12 and the magnet 111, and the third connecting channel 153 is located between the sheath 12 and the second connecting shaft 18. It should be noted that the first connecting shaft 17 and the second connecting shaft 18 have identical structures.

[0065] In practice, the cold air flows sequentially through the inlet 13, the first connecting channel 151, the second connecting channel 152, the third connecting channel 153 and the outlet 14, cooling the first connecting shaft 17, the magnet 111 and the second connecting shaft 18 in sequence. This further ensures that the cold air can fully exchange heat with the heat emitted by the magnet 111, and achieves full heat dissipation from the outer wall of the magnet 111.

[0066] Specifically, the connecting channel 15 has two implementations, wherein:

[0067] In the first implementation, such as Figures 4 to 25As shown, the magnet 111 has multiple first grooves and multiple first protrusions, which are alternately arranged sequentially along the axial direction of the rotor body 10. Each first groove is an annular channel 154, and each first protrusion is an annular partition 16. The first connecting shaft 17 has multiple second grooves and multiple second protrusions, which are alternately arranged sequentially along the axial direction of the rotor body 10. Each second groove is an annular channel 154, and each second protrusion is an annular partition 16. The second connecting shaft 1... The rotor body 10 is provided with multiple third grooves and multiple third protrusions, which are arranged alternately along the axial direction of the rotor body 10. Each third groove is an annular channel 154, and each third protrusion is an annular partition 16. Each first protrusion, each second protrusion, and each third protrusion are in contact with the inner wall of the sheath 12. And / or, the end of the first connecting shaft 17 that is connected to the magnet 111 is provided with a second groove. And / or, the end of the second connecting shaft 18 that is connected to the magnet 111 is provided with a third groove.

[0068] In specific implementation, multiple first grooves and multiple first protrusions form a second connecting channel 152, multiple second grooves and multiple second protrusions form a first connecting channel 151, and multiple third grooves and multiple third protrusions form a third connecting channel 153. Each annular partition 16 is provided with an opening 161, through which cold air can flow sequentially through each second groove, first groove, and third groove. The connection between the second groove, first groove, and third groove ensures that the cold air can flow fully between the magnet 111 and the sheath 12, further ensuring the heat dissipation effect of the cold air on the magnet 111.

[0069] In specific implementation, a second groove is provided at the end of the first connecting shaft 17 that is connected to the magnet 111. The second groove allows the first connecting shaft 17 to communicate with the magnet 111 at any position within 360° of the circumference of the rotor body 10, facilitating the production and installation of the rotor structure. A third groove is provided at the end of the second connecting shaft 18 that is connected to the magnet 111. The third groove allows the second connecting shaft 18 to communicate with the magnet 111 at any position within 360° of the circumference of the rotor body 10, facilitating the production and installation of the rotor structure.

[0070] In the second implementation, such as Figure 26 and 27As shown, the sheath 12 is provided with multiple fourth grooves and multiple fourth protrusions, which are arranged alternately along the axial direction of the rotor body 10. Each fourth groove is an annular channel 154, and each fourth protrusion is an annular partition 16. Each fourth protrusion is in contact with one of the magnet 111, the first connecting shaft 17, and the second connecting shaft 18. In specific implementation, the multiple fourth grooves and multiple fourth protrusions form an annular channel 154, and each fourth protrusion is in contact with one of the magnet 111, the first connecting shaft 17, and the second connecting shaft 18, so that the fourth groove can be connected to one of the second groove, the first groove, and the third groove, which facilitates the flow of cold air and facilitates the cooling of the outer wall of the magnet 111. The sheath 12 is connected to the first connecting shaft 17 and the second connecting shaft 18 by a heat fitting process. The heat fitting process causes gas to be generated inside the rotor body 10, and the gas can flow through the fourth groove and be discharged from the outlet 14.

[0071] Specifically, inlet 13 is provided on sleeve 12; and / or, outlet 14 is provided on sleeve 12.

[0072] In practice, this arrangement facilitates the flow of gas inside the rotor body 10 through the fourth groove and its discharge from the inlet 13 and outlet 14, ensuring smooth motor operation.

[0073] Optionally, the inlet 13 is a through hole or a notch provided at the end of the sheath 12; the outlet 14 is a through hole or a notch provided at the end of the sheath 12.

[0074] Optionally, there are multiple inlets 13 and outlets 14, which ensures that the fluid inside the rotor structure can be discharged quickly.

[0075] Optionally, the sheath 12 has a first sheath portion and a second sheath portion arranged opposite to each other along the radial direction of the rotor body 10. The inlet 13 and the outlet 14 are respectively arranged on the first sheath portion and the second sheath portion, so that the cold air can flow fully between the magnet 111 and the sheath 12, further ensuring the heat dissipation effect of the cold air on the magnet 111.

[0076] In other embodiments, not shown in the figure, the connecting channel 15 is a spiral channel. The first end of the spiral channel is connected to the inlet 13, and the second end of the spiral channel is connected to the outlet 14. Cold air can flow along the spiral channel to dissipate heat from the magnet 111.

[0077] The present invention also provides an electric motor, including the rotor structure described in the above embodiments.

[0078] The motor of the present invention includes the rotor structure described in the above embodiments. The rotor structure includes a rotor body 10, which includes a main body 11 and a sheath 12. The main body 11 includes magnets 111. The rotor body 10 has an inlet 13, an outlet 14, and a connecting channel 15. The first end of the connecting channel 15 is connected to the inlet 13, and the second end of the connecting channel 15 is connected to the outlet 14. Cold air flows into the connecting channel 15 inside the rotor body 10 through the inlet 13, and the cold air exchanges heat with the magnets 111. The cold air then heats the magnets 111 from inside the rotor body 10. The outer wall is cooled and dissipated, and the cold air that has completed the heat exchange flows out of the rotor body 10 from the outlet 14. The connection between the inside and outside of the rotor body 10 is achieved by setting the inlet 13 and the outlet 14. A connecting channel 15 is set between the magnet 111 and the sheath 12, so that the external cold air can directly dissipate heat to the outer wall of the magnet 111 inside the rotor body 10 through the connecting channel 15, which improves the heat dissipation efficiency of the magnet 111. This solves the problem of difficult heat dissipation of the magnet in the rotor structure in the prior art and avoids demagnetization of the magnet 111 and deterioration of motor performance.

[0079] The present invention also provides a centrifuge, including the motor described in the above embodiments.

[0080] The centrifuge of the present invention includes the motor in the above embodiments, the motor including the rotor structure in the above embodiments, the rotor structure including a rotor body 10, the rotor body 10 including a main body 11 and a sheath 12, the main body 11 including a magnet 111, the rotor body 10 having an inlet 13, an outlet 14 and a connecting channel 15, the first end of the connecting channel 15 communicating with the inlet 13, and the second end of the connecting channel 15 communicating with the outlet 14; cold air flows into the connecting channel 15 inside the rotor body 10 through the inlet 13, and the cold air exchanges heat with the magnet 111, exiting from inside the rotor body 10. The outer wall of the magnet 111 is cooled and dissipated, and the cold air that has completed the heat exchange flows out of the rotor body 10 from the outlet 14. The connection between the inside and outside of the rotor body 10 is achieved by setting the inlet 13 and the outlet 14. A connecting channel 15 is set between the magnet 111 and the sheath 12, so that the external cold air can directly dissipate heat to the outer wall of the magnet 111 inside the rotor body 10 through the connecting channel 15, which improves the heat dissipation efficiency of the magnet 111. This solves the problem of difficult heat dissipation of the magnet in the rotor structure in the prior art and avoids demagnetization of the magnet 111 and deterioration of motor performance.

[0081] Alternatively, the centrifuge can be an air compressor or a centrifugal air conditioning compressor.

[0082] In specific implementation, the rotor structure of the present invention opens an annular channel 154 on the outer surface of the first connecting shaft 17, the magnet 111, and the second connecting shaft 18, and opens an inlet 13 and an outlet 14 on the sheath 12, so that the rotor body 10 is connected inside and out. Cool air can enter the interior of the rotor body 10 through the inlet 13 and flow out from the outlet 14 along the connecting channel 15. This process cools the rotor body 10, greatly reduces the temperature of the magnet 111 and the rotor structure, and avoids demagnetization of the magnet, which would cause the motor performance to deteriorate or even fail. The rotor structure of the present invention can effectively remove the gas inside the rotor body 10, improve production stability and improve rotor quality.

[0083] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0084] The rotor structure of the present invention includes a rotor body 10, which includes a main body 11 and a sheath 12. The main body 11 includes magnets 111. The rotor body 10 has an inlet 13, an outlet 14, and a connecting channel 15. The first end of the connecting channel 15 is connected to the inlet 13, and the second end of the connecting channel 15 is connected to the outlet 14. Cold air flows into the connecting channel 15 inside the rotor body 10 through the inlet 13, and the cold air exchanges heat with the magnets 111, cooling the outer wall of the magnets 111 from inside the rotor body 10. Then, the cooled air that has completed the heat exchange flows out of the rotor body 10 from the outlet 14. The connection between the inside and outside of the rotor body 10 is achieved by setting the inlet 13 and the outlet 14. A connecting channel 15 is set between the magnet 111 and the sheath 12, so that the external cooled air can directly dissipate heat to the outer wall of the magnet 111 inside the rotor body 10 through the connecting channel 15, thereby improving the heat dissipation efficiency of the magnet 111. This solves the problem of difficult heat dissipation of the magnet in the rotor structure in the prior art and avoids demagnetization of the magnet 111 and deterioration of motor performance.

[0085] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0086] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0087] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rotor structure comprising a rotor body (10), the rotor body (10) comprising a main body portion (11) and a sheath (12) sleeved on the main body portion (11), the main body portion (11) comprising a magnet (111), and the sheath (12) sleeved on the magnet (111), characterized in that, The rotor body (10) has an inlet (13), an outlet (14) and a connecting channel (15). The first end of the connecting channel (15) is connected to the inlet (13), and the second end of the connecting channel (15) is connected to the outlet (14). The communication channel (15) is provided between the magnet (111) and the sheath (12) so that the gas flowing through the communication channel (15) can dissipate heat from the outer wall of the magnet (111). The connecting channel (15) includes multiple annular channels (154), each of which is arranged around the axis of the rotor body (10); the rotor body (10) also includes multiple annular partitions (16), each of which is arranged around the axis of the rotor body (10); the multiple annular channels (154) and the multiple annular partitions (16) are arranged alternately along the axial direction of the rotor body (10) so that any two adjacent annular channels (154) are separated by the annular partitions (16); wherein each annular partition (16) is provided with an opening (161) so that the annular channels (154) on both sides of the annular partition (16) are connected through the opening (161); Any two adjacent annular partitions (16) among the plurality of annular partitions (16) include a first annular partition and a second annular partition, and the openings (161) on the first annular partition and the openings (161) on the second annular partition are staggered along the circumferential direction of the rotor body (10). The rotor body (10) has a plurality of connecting channels (15), the plurality of connecting channels (15) including a first connecting channel (151), a second connecting channel (152) and a third connecting channel (153), the first connecting channel (151), the second connecting channel (152) and the third connecting channel (153) being sequentially connected, the end of the first connecting channel (151) away from the second connecting channel (152) being connected to the inlet (13), and the end of the third connecting channel (153) away from the second connecting channel (152) being connected to the outlet (14); the rotor body (151) has a plurality of connecting channels (151) including a first connecting channel (151), a second connecting channel (152) and a third connecting channel (153) away from the second connecting channel (152) being connected to the outlet (14); the rotor body (151) has a plurality of connecting channels (152) including a first connecting channel (151), a second connecting channel (152) and a third connecting channel (153) being connected to the inlet (13), and the end of the ...53) and a third connecting channel (153) being connected to the inlet (154) and a third connecting channel (153) being connected to the inlet (154) and a third connecting channel ( 0) It also includes a first connecting shaft (17) and a second connecting shaft (18), the first connecting shaft (17) and the second connecting shaft (18) are located on opposite sides of the magnet (111), and the sheath (12) is sleeved on the first connecting shaft (17) and the second connecting shaft (18); wherein, the first connecting channel (151) is disposed between the sheath (12) and the first connecting shaft (17), the second connecting channel (152) is disposed between the sheath (12) and the magnet (111), and the third connecting channel (153) is disposed between the sheath (12) and the second connecting shaft (18).

2. The rotor structure according to claim 1, characterized in that, The projections of at least two openings (161) on any two adjacent annular partitions (16) in the plurality of annular partitions (16) are uniformly arranged along the circumferential direction of the rotor body (10) on the projection plane; wherein the projection plane is arranged perpendicular to the axial direction of the rotor body (10).

3. The rotor structure according to claim 2, characterized in that, Each of the annular partitions (16) is provided with an opening (161), and the projections of the two openings (161) on any two adjacent annular partitions (16) on the projection plane are set at an angle of 180° along the circumferential direction of the rotor body (10).

4. The rotor structure according to claim 2, characterized in that, Each of the annular partitions (16) is provided with two openings (161), and the two openings (161) on each of the annular partitions (16) are arranged at an angle of 180° along the circumferential direction of the rotor body (10). The projections of each of the openings (161) on the first annular partition and the projections of each of the openings (161) on the second annular partition on the projection plane are set at a 90° angle along the circumferential direction of the rotor body (10).

5. The rotor structure according to claim 1, characterized in that, The magnet (111) has multiple first grooves and multiple first protrusions, which are alternately arranged sequentially along the axial direction of the rotor body (10). Each first groove is an annular channel (154), and each first protrusion is an annular partition (16). The first connecting shaft (17) has multiple second grooves and multiple second protrusions, which are alternately arranged sequentially along the axial direction of the rotor body (10). Each second groove is an annular channel (154), and each second protrusion is an annular partition (16). The second connecting shaft (18) has multiple third grooves and multiple third protrusions, which are alternately arranged sequentially along the axial direction of the rotor body (10). Each third groove is an annular channel (154), and each third protrusion is an annular partition (16). Wherein: Each of the first protrusions, each of the second protrusions, and each of the third protrusions are all in contact with the inner wall of the sheath (12); and / or, The first connecting shaft (17) has a second groove at one end that is in contact with the magnet (111); and / or, The second connecting shaft (18) is provided with the third groove at one end that is in contact with the magnet (111).

6. The rotor structure according to claim 1, characterized in that, The sheath (12) is provided with a plurality of fourth grooves and a plurality of fourth protrusions. The plurality of fourth grooves and the plurality of fourth protrusions are arranged alternately along the axial direction of the rotor body (10). Each of the fourth grooves is an annular channel (154), and each of the fourth protrusions is an annular partition (16). Each of the fourth protrusions is in contact with one of the magnet (111), the first connecting shaft (17), and the second connecting shaft (18).

7. The rotor structure according to any one of claims 1 to 4, characterized in that, The inlet (13) is disposed on the sheath (12); and / or, The outlet (14) is located on the sheath (12).

8. An electric motor, characterized in that, The rotor structure includes any one of claims 1 to 7.

9. A centrifuge, characterized in that, Includes the motor as described in claim 8.

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