Self-driven heat dissipation rotor structure and motor

Abstract

The utility model discloses a self-driven heat radiation rotor structure and a motor, the self-driven heat radiation rotor structure comprises a rotor core; the rotor core is provided with a channel, and the channel penetrates through the rotor core; the inlet of the channel is arranged on the end face of the rotor core and is close to the rotor rotation center, and the outlet of the channel is far away from the rotor rotation center; when the rotor rotates, the heat dissipation medium is sucked into the inlet of the channel, is driven by the centrifugal force difference between the two ends of the channel to flow, flows through the channel and flows out of the outlet of the channel. According to the utility model, external driving is not needed, the heat dissipation medium automatically flows in the rotor when the rotor rotates, and the temperature in the rotor can be effectively reduced.

Description

Technical Field

[0001] The invention relates to a self-driven heat dissipation rotor structure and a motor, belonging to the technical field of fluid machinery. Background Art

[0002] In order to pursue high power density, modern motors usually use flowing media such as liquid or gas to flow through the gaps between the motor rotor, stator and windings to quickly take away the heat accumulated in the rotor, stator and windings.

[0003] In the existing design, the power for the medium to flow inside the motor is provided by an external pump. In particular, for the heat dissipation of the rotor, the medium is injected from the axial direction of the rotating shaft and flows out through the holes in the radial direction of the rotating shaft. This design cannot fully dissipate the heat inside the rotor, and brings about problems such as complex processing technology for the rotating shaft and difficulty in sealing. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a self-driven heat dissipation rotor structure and motor, which does not require external drive. When the rotor rotates, the heat dissipation medium flows automatically inside the rotor, which can effectively reduce the internal temperature of the rotor. To achieve the above purpose, the present invention is implemented by the following technical solutions:

[0005] In a first aspect, the utility model provides a self-driven heat dissipating rotor structure, comprising: a rotor core;

[0006] The rotor core is provided with a channel, and the channel runs through the rotor core;

[0007] The inlet of the channel is arranged on the end surface of the rotor core and close to the rotation center of the rotor, and the outlet of the channel is far away from the rotation center of the rotor;

[0008] When the rotor rotates, the heat dissipation medium is sucked into the inlet of the channel, driven by the centrifugal force difference at both ends of the channel to flow, flows through the channel, and flows out from the outlet of the channel.

[0009] In combination with the first aspect, optionally, there are multiple channels, which are symmetrically arranged along the axis.

[0010] In combination with the first aspect, optionally, the channel is one or more of a curved channel, a folded line channel, and a straight line channel.

[0011] In combination with the first aspect, optionally, the outlet of the channel is arranged at one or more of the rotor circumference facing the stator, the bottom of the rotor permanent magnet, and the bottom of the rotor magnetic isolation bridge.

[0012] In combination with the first aspect, optionally, it further includes cover plates arranged at both ends of the rotor core, and the cover plates are provided with suction through holes, and the suction through holes are connected to the inlet of the channel.

[0013] In combination with the first aspect, optionally, a discharge through hole is further provided on the cover plate, and the discharge through hole is connected to the outlet of the channel and is used for discharging the heat dissipation medium in the channel.

[0014] In combination with the first aspect, optionally, the rotor core comprises an end rotor core and a middle rotor core, the end rotor cores are arranged at both ends of the middle rotor core, the channel runs through the middle rotor core, and the inlet and outlet of the channel are arranged on the middle rotor core;

[0015] The end rotor core is provided with a suction through hole, and the suction through hole is connected to the inlet of the channel.

[0016] In combination with the first aspect, optionally, a discharge through hole is further provided on the end rotor core, and the discharge through hole is connected to the outlet of the channel and is used to discharge the heat dissipation medium in the channel.

[0017] In combination with the first aspect, optionally, the suction through hole and the discharge through hole are conical through holes, and the end of the conical through hole with a smaller orifice area is close to the rotor core, and the end of the conical through hole with a larger orifice area is far away from the rotor core.

[0018] In a second aspect, optionally, the utility model provides a motor, comprising the self-driven heat dissipation rotor structure described in the first aspect.

[0019] Compared with the prior art, the beneficial effects achieved by the self-driven heat dissipation rotor structure and motor provided by the embodiment of the utility model include:

[0020] The utility model comprises a rotor core; a channel is arranged on the rotor core, and the channel runs through the rotor core; the inlet of the channel is arranged on the end surface of the rotor core and close to the rotor rotation center, and the outlet of the channel is far away from the rotor rotation center; the channel arranged in the utility model can reduce the mass of the motor rotor like a traditional weight-reducing hole, and can also provide a channel for the heat dissipation medium to flow inside the rotor, and can effectively reduce the internal temperature of the rotor;

[0021] When the rotor of the utility model rotates, the heat dissipation medium is sucked into the inlet of the channel, driven by the centrifugal force difference at both ends of the channel to flow, flow through the channel, and flow out from the outlet of the channel; the utility model does not require special rotating shaft processing and assembly, and does not require external drive. When the rotor rotates, the heat dissipation medium flows automatically inside the rotor and plays a role in promoting heat dissipation; and the higher the motor speed, the greater the flow speed of the heat dissipation medium, the better the heat dissipation effect, and can better take away the heat inside the rotor, thereby enhancing the performance of the motor.

[0022] The outlet of the channel of the utility model is arranged at one or more of the rotor circumference facing the stator, the bottom of the rotor permanent magnet, and the bottom of the rotor magnetic isolation bridge; the utility model can reduce the temperature of heat-sensitive materials inside the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a self-driven heat dissipating rotor structure provided in Embodiment 1 of the utility model;

[0024] Figure 2 A schematic diagram of a structure in which a cover plate is provided in a self-driven heat dissipation rotor structure provided in Embodiment 1 of the utility model and a channel outlet is at the bottom of the rotor permanent magnet;

[0025] Figure 3 A schematic diagram of a self-driven heat dissipation rotor structure provided in Embodiment 1 of the utility model, in which the suction through hole and the discharge through hole on the cover plate are conical through holes;

[0026] Figure 4 A schematic diagram of a structure in which a cover plate is provided in a self-driven heat dissipation rotor structure provided in Embodiment 1 of the utility model, and the channel outlet is located at the circumference of the rotor;

[0027] Figure 5 A schematic diagram of a structure in which a cover plate is provided in a self-driven heat dissipation rotor structure provided in Embodiment 1 of the utility model and a channel outlet is at the bottom of the rotor magnetic isolation bridge;

[0028] Figure 6 This is a schematic structural diagram of a self-driven heat dissipation rotor structure provided in Embodiment 2 of the present utility model, in which a cover plate is not provided and the channel outlet is at the circumference of the rotor.

[0029] In the figure:

[0030] 1. channel; 101. channel entrance; 102. channel exit;

[0031] 2. Permanent magnet;

[0032] 3. Cover plate; 301. Suction through hole; 302. Discharge through hole;

[0033] 4. rotor core; 401. end rotor core; 402. middle rotor core;

[0034] 5. Stator;

[0035] 6. Magnetic isolation bridge. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting / sleeving", "sleeve connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Embodiment 1:

[0040] This embodiment provides a self-driven heat dissipation rotor structure, including: a rotor core 4. Figure 1 As shown, a channel 1 is provided on the rotor core 4, and the channel 1 runs through the rotor core 4. The inlet 101 of the channel is provided on the end surface of the rotor core 4 and is close to the rotor rotation center, and the outlet 102 of the channel is far away from the rotor rotation center. When the rotor rotates, the heat dissipation medium is sucked into the inlet 101 of the channel, driven by the centrifugal force difference at both ends of the channel 1, flows through the channel 1, and flows out from the outlet 102 of the channel.

[0041] The rotor core 4 is composed of magnetic conductive material and / or permanent magnetic material, and is a core part that interacts with the rotating magnetic field generated by the stator 5 to generate torque.

[0042] A self-driven heat dissipating rotor structure also includes cover plates 3 arranged at both ends of a rotor core 4. The cover plates 3 not only play a role in axially pressing the rotor core 4, but also play a role in blocking the opening of the channel 1 to limit the heat dissipation medium from flowing in from the inlet and out from the outlet.

[0043] In this embodiment, the heat dissipation medium is air and / or cooling liquid.

[0044] There are multiple channels 1, and the channel inlet 101, the channel outlet 102, and the channel 1 are all arranged symmetrically along the axis, which is beneficial to maintaining the dynamic balance of the rotor.

[0045] The outlet 102 of the channel is arranged at one or more of the circumference of the rotor facing the stator 5, the bottom of the rotor permanent magnet 2, and the bottom of the rotor magnetic isolation bridge 6. The outlet 102 of the channel is arranged by the above three combinations, for example Figure 1 In the structure shown, the outlet 102 of the channel is arranged at the circumference of the rotor facing the stator 5 and at the bottom of the rotor permanent magnet 2 .

[0046] Channel 1 is one or more of a curved channel, a folded line channel, and a straight line channel. When a curved channel or a folded line channel is used, the longer the path of the heat dissipation medium, the more heat can be taken away, and the higher the heat dissipation performance. The shape of channel 1 is set by the above three combinations, for example Figure 1 In the structure shown, the channel 1 whose outlet 102 is below the permanent magnet 2 is a straight channel, and the channel 1 whose outlet is on the circumference is a curved channel.

[0047] Channel 1 can not only reduce the mass of the motor rotor like a traditional weight-reducing hole, but also provide a channel 1 for the heat dissipation medium to flow inside the rotor, which can effectively reduce the internal temperature of the rotor.

[0048] like Figure 2 As shown, when the outlet 102 of the channel is arranged at the bottom of the rotor permanent magnet 2, the heat dissipation medium flows through the bottom of the permanent magnet 2 to directly dissipate the heat of the permanent magnet 2. The cover plate 3 is provided with a suction through hole 301, and the suction through hole 301 is connected to the inlet 101 of the channel. The cover plate 3 is provided with a discharge through hole 302, and the discharge through hole 302 is connected to the outlet 102 of the channel, and is used to discharge the heat dissipation medium in the channel 1, specifically, to discharge the heat dissipation medium at the bottom of the rotor permanent magnet 2.

[0049] like Figure 4 As shown, when the outlet 102 of the channel is arranged at the rotor circumference where the rotor faces the stator 5, the heat dissipation medium is ejected from the outlet 102 of the channel to directly dissipate heat to the stator 5. The cover plate 3 is provided with an inlet through hole 301, and the inlet through hole 301 is connected to the inlet 101 of the channel. The end surface of the cover plate 3 may also be provided with an outlet through hole 302. While the heat dissipation medium is ejected toward the stator 5, the heat dissipation medium can also be discharged from the outlet through hole 302 on the end surface.

[0050] like Figure 5As shown, when the outlet 102 of the channel is arranged at the bottom of the rotor magnetic isolation bridge 6, the heat dissipation medium flows through the magnetic isolation bridge 6 below the permanent magnet 2, so as to realize heat dissipation of the permanent magnet 2. The cover plate 3 is provided with a suction through hole 301, and the suction through hole 301 is connected to the inlet 101 of the channel. The cover plate 3 is provided with a discharge through hole 302, and the discharge through hole 302 is connected to the outlet 102 of the channel, and is used to discharge the heat dissipation medium in the channel 1, specifically, to discharge the heat dissipation medium at the bottom of the rotor magnetic isolation bridge 6.

[0051] Specifically, the cover plates 3 provided at both ends of the rotor core 4 have a variety of settings. Setting 1: one end cover plate 3 has only a suction through hole 301, and the other end cover plate 3 has only a discharge through hole 302. This setting can limit the axial flow direction of the heat dissipation medium. Setting 2: both end cover plates 3 are provided with a suction through hole 301 and a discharge through hole 302. This setting is conducive to more uniform heat dissipation of the rotor.

[0052] The outlet 102 of the channel of this embodiment is arranged at one or more of the rotor circumference facing the stator 5, the bottom of the rotor permanent magnet 2, and the bottom of the rotor magnetic isolation bridge 6, which can reduce the temperature of heat-sensitive materials (especially permanent magnets 2) inside the rotor.

[0053] like Figure 3 As shown, both the suction through hole 301 and the discharge through hole 302 are tapered through holes, and the end with a smaller opening area in the tapered through hole is close to the rotor core 4, and the end with a larger opening area in the tapered through hole is away from the rotor core 4. If the suction through hole 301 and the discharge through hole 302 are through holes perpendicular to the cover plate 3, the openings of the vertical through holes are prone to cause large eddy current losses, and even cavitation.

[0054] In this embodiment, no special rotating shaft processing and assembly are required, and no external drive is required. When the rotor rotates, the heat dissipation medium flows automatically inside the rotor and plays a role in promoting heat dissipation. The higher the motor speed, the greater the flow rate of the heat dissipation medium, the better the heat dissipation effect, and the better it can take away the heat inside the rotor, thereby enhancing the performance of the motor.

[0055] Embodiment 2:

[0056] This embodiment provides a self-driven heat dissipation rotor structure, which is similar to the self-driven heat dissipation rotor structure provided in the first embodiment. The difference is that: Figure 6 As shown, the rotor core 4 of this embodiment includes an end rotor core 401 and a middle rotor core 402 . The end rotor cores 401 are arranged at both ends of the middle rotor core 402 , and the channel 1 runs through the middle rotor core 402 .

[0057] The inlet 101 of the channel is arranged on the end surface of the middle rotor core 402, close to the rotor rotation center, and the outlet 102 of the channel is arranged on the middle rotor core 402, away from the rotor rotation center. When the rotor rotates, the heat dissipation medium is sucked into the inlet 101 of the channel, driven by the centrifugal force difference at both ends of the channel 1, flows through the channel 1, and flows out from the outlet 102 of the channel. This embodiment adopts the same channel 1 arrangement as the first embodiment.

[0058] The rotor core 4 is composed of magnetic conductive material and / or permanent magnetic material, and is a core part that interacts with the rotating magnetic field generated by the stator 5 to generate torque.

[0059] The end rotor core 401 is provided with a suction through hole 301 , and the suction through hole 301 serves as the inlet 101 of the channel.

[0060] The end rotor core 401 is also provided with a discharge through hole 302 , which is connected to the outlet 102 of the channel and is used to discharge the heat dissipation medium in the channel 1 .

[0061] The suction through hole 301 and the discharge through hole 302 are conical through holes, wherein the end of the conical through hole with a smaller opening area is close to the middle rotor core 402 , and the end of the conical through hole with a larger opening area is far away from the middle rotor core 402 .

[0062] This embodiment provides a further configuration: the rotor core 4 is provided with a channel inlet 101, a channel outlet 102 and a channel 1, and the channel is blocked only with filling materials at both ends of the rotor core 4. This configuration makes the rotor core 4 difficult to manufacture, inconvenient to disassemble and maintain, and difficult to implement with current technology.

[0063] Embodiment three:

[0064] This embodiment provides a motor, comprising the self-driven heat dissipation rotor structure described in the first or second embodiment of the claim.

[0065] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0066] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-driven heat dissipation rotor structure, It is characterized in that include: rotor core; The rotor core is provided with a channel, and the channel runs through the rotor core; The inlet of the channel is arranged on the end surface of the rotor core and close to the rotation center of the rotor, and the outlet of the channel is far away from the rotation center of the rotor; When the rotor rotates, the heat dissipation medium is sucked into the inlet of the channel, driven by the centrifugal force difference between the two ends of the channel, flows through the channel, and flows out from the outlet of the channel; The outlet of the channel is arranged at one or more of the following locations: the circumference of the rotor facing the stator, the bottom of the rotor permanent magnet, and the bottom of the rotor magnetic isolation bridge; It also includes cover plates arranged at both ends of the rotor core, wherein the cover plates are provided with a suction through hole, and the suction through hole is connected to the inlet of the channel; the cover plates are also provided with a discharge through hole, and the discharge through hole is connected to the outlet of the channel for discharging the heat dissipation medium in the channel.

2. The self-driven heat dissipating rotor structure according to claim 1, It is characterized in that There are multiple channels, which are symmetrically arranged along the axis.

3. The self-driven heat dissipating rotor structure according to claim 1, It is characterized in that The channel is one or more of a curved channel, a broken line channel, and a straight line channel.

4. The self-driven heat dissipating rotor structure according to claim 1, It is characterized in that The rotor core comprises an end rotor core and a middle rotor core, wherein the end rotor cores are arranged at both ends of the middle rotor core, the channel runs through the middle rotor core, and the inlet and the outlet of the channel are arranged on the middle rotor core; The end rotor core is provided with a suction through hole, and the suction through hole is connected to the inlet of the channel.

5. The self-driven heat dissipating rotor structure according to claim 4, It is characterized in that The end rotor core is also provided with a discharge through hole, which is connected to the outlet of the channel and is used to discharge the heat dissipation medium in the channel.

6. The self-driven heat dissipating rotor structure according to claim 1 or 5, It is characterized in that The suction through hole and the discharge through hole are conical through holes, wherein the end of the conical through hole with a smaller aperture area is close to the rotor core, and the end of the conical through hole with a larger aperture area is far away from the rotor core.

7. A motor, It is characterized in that A self-driven heat dissipating rotor structure comprising any one of claims 1-6.

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