Heat sink, rotor assembly and motor

Abstract

This application relates to a heat sink, a rotor assembly, and a motor. The heat sink includes a support ring and heat-conducting strips. Each heat-conducting strip includes a heat-dissipating section and a heat-absorbing section connected together. The heat-dissipating section is connected to the end face of the support ring, and the heat-absorbing section is located on the outer periphery of the support ring. Multiple heat-conducting strips are arranged sequentially along the circumference of the support ring. The heat-absorbing section is parallel to the winding hypotenuse of the rotor winding. This application, through the above solution, not only solves the problems of corona discharge and heat dissipation at the winding end, but also makes the heat dissipation of the winding hypotenuse more direct and rapid, thereby reducing the gap between two adjacent winding hypotenuses and reducing the length of the winding end. This reduces end leakage reactance and heat generation at the winding end, as well as the weight of the winding end, thus improving the mechanical strength of the motor. Simultaneously, the heat-conducting strips support the winding end, improving its positional stability. Ultimately, this improves the reliability of the motor.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a heat sink, rotor assembly and motor. Background Technology

[0002] An electric motor is an electromagnetic device that converts electrical energy into mechanical energy based on the law of electromagnetic induction. A generator-motor is a type of electric motor that can be used as both a generator and an electric motor. An electric motor mainly consists of a housing, a stator assembly fixed within the housing, and a rotor assembly rotatably mounted within the housing. The rotor assembly includes a main shaft, an iron core sleeved on the main shaft, and rotor windings wound around the rotor core.

[0003] Currently, the reliability of motors is poor. Summary of the Invention

[0004] This application provides a heat sink that can improve the heat dissipation efficiency of a motor, thereby at least solving the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a heat dissipation component is provided, comprising a support ring and heat-conducting strips; the heat-conducting strips include a heat-dissipating section and a heat-absorbing section connected to each other, the heat-dissipating section being connected to the end face of the support ring, and the heat-absorbing section being located on the outer periphery of the support ring; there are multiple heat-conducting strips, which are arranged sequentially along the circumference of the support ring; wherein, the heat-absorbing section is parallel to the upper inclined side of the rotor winding, or, the heat-absorbing section is parallel to the lower inclined side of the rotor winding, or, the heat-absorbing section of a portion of the heat-conducting strips is parallel to the upper inclined side, and the heat-absorbing section of the remaining portion of the heat-conducting strips is parallel to the lower inclined side.

[0006] Optionally, the heat-conducting strip has a heat dissipation channel, part of which is disposed in the heat dissipation section and the other part is disposed in the heat absorption section; wherein, the heat dissipation channel is used to fill the heat exchange medium.

[0007] Optionally, the heat dissipation channel includes two first sub-channels and two second sub-channels. The two ends of the two first sub-channels are respectively disposed in the heat dissipation section and the heat absorption section. The two second sub-channels are located between the two first sub-channels, and the two ends of the two second sub-channels are respectively disposed in the heat dissipation section and the heat absorption section. The ends of the two first sub-channels in the heat dissipation section are interconnected, the ends of the two second sub-channels in the heat dissipation section are interconnected, and the ends of the two first sub-channels in the heat absorption section are respectively connected to the ends of the two second sub-channels in the heat absorption section.

[0008] And / or, the heat-conducting strip is provided with a threaded hole, which is connected to the heat dissipation channel, and the heat dissipation component also includes a threaded end cap, which is threadedly connected to the threaded hole.

[0009] Optionally, the heat sink also includes a clamping ring and a first screw. The axis of the clamping ring is parallel to the axis of the support ring. The clamping ring is located on the side of the heat sink section away from the support ring. The end of the shank of the first screw passes through the clamping ring and is threaded to the support ring.

[0010] Optionally, multiple slots are provided on the support ring, with one side of the heat dissipation section inserted into the slot and the other side abutting against the clamping ring.

[0011] Optionally, a first stepped groove is provided on the side of the heat dissipation section facing the compression ring, and the inner ring surface of the compression ring abuts against one side wall of the first stepped groove.

[0012] Optionally, a boss is provided on the surface of the support ring facing the heat dissipation section, a portion of the surface of the heat dissipation section facing the support ring is connected to the boss, and the remaining portion is spaced apart from the support ring; and / or, a weight-reducing groove is provided on the inner ring surface of the support ring, and the weight-reducing groove extends along the circumference of the support ring.

[0013] Optionally, the heat-absorbing section of a portion of the heat-conducting strip is parallel to the upper inclined side, while the heat-absorbing section of the remaining portion of the heat-conducting strip is parallel to the lower inclined side; wherein, along the circumference of the support ring, the heat dissipation sections connected to the heat-absorbing sections parallel to the lower inclined side and the heat dissipation sections connected to the heat-absorbing sections parallel to the upper inclined side are sequentially and alternately distributed, and the heat-absorbing sections parallel to the lower inclined side are located between the heat-absorbing sections parallel to the upper inclined side.

[0014] According to a second aspect of this application, a rotor assembly is provided, the rotor assembly including a main shaft, a rotor support, a rotor core, rotor windings and the aforementioned heat sink; the rotor support is sleeved on the main shaft; the rotor core is sleeved on the rotor support, and a winding groove is provided on the side of the rotor core away from the main shaft; the rotor windings include a connected straight edge and a winding inclined edge group, the straight edge of the windings is provided in the winding groove, and the winding inclined edge group is located at one end of the rotor core; a support ring is sleeved on the main shaft and located at one end of the rotor core, and the winding inclined edge group is thermally coupled to the heat absorption section.

[0015] According to a third aspect of this application, an electric motor is provided, the electric motor including the aforementioned rotor assembly.

[0016] In the heat dissipation component of this application embodiment, the heat dissipation section cools the inclined side of the rotor winding. This not only solves problems such as corona discharge and heat dissipation at the winding end, but also makes the heat dissipation of the inclined side more direct and rapid, thereby reducing the gap between two adjacent inclined sides and thus reducing the length of the winding end. This reduces end leakage reactance and heat generation at the winding end, improving motor performance, and also reduces the weight of the winding end, reducing torque during motor operation and improving mechanical strength. Simultaneously, the heat-conducting strip supports the winding end, improving its positional stability and ensuring synchronization between the rotor winding and the main shaft. Ultimately, this improves motor reliability.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0020] Figure 1 This is a schematic diagram of the cooperation between the rotor winding and the rotor core in related technologies;

[0021] Figure 2 This is a schematic diagram of a partial structure of the rotor winding in related technologies;

[0022] Figure 3 This is a schematic diagram illustrating the coordination of multiple winding hypotenuse groups in related technologies;

[0023] Figure 4 This is a schematic diagram of the structure of the heat sink provided in an exemplary embodiment of this disclosure;

[0024] Figure 5 This is a schematic diagram of the cooperation between the support ring and the heat-conducting strip provided in an exemplary embodiment of this disclosure;

[0025] Figure 6 This is a schematic diagram of the heat sink and the winding bevel assembly provided in an exemplary embodiment of this disclosure;

[0026] Figure 7 This is a schematic diagram of the structure of the heat-conducting strip provided in an exemplary embodiment of this disclosure;

[0027] Figure 8 This is a side view of the heat-conducting strip provided in an exemplary embodiment of this disclosure;

[0028] Figure 9 yes Figure 8 A schematic diagram of the cross-sectional structure of AAA in the middle;

[0029] Figure 10 This is a comparison diagram of the gap between the winding bevels in related technologies and the gap between the winding bevels of the heat sink provided in the exemplary embodiments of this disclosure;

[0030] Figure 11 yes Figure 5 Sectional view of BB;

[0031] Figure 12 This is a partial structural diagram of the rotor assembly provided in an exemplary embodiment of this disclosure.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Rotor assembly; 11-Rotor winding; 111-Straight edge of winding; 112-Winding end; 113-Hydraulic edge of winding; 114-Upper hypotenuse; 115-Lower hypotenuse; 116-Hydraulic edge gap;

[0034] 12-Rotor core; 121-Winding slot; 13-Main shaft; 14-Rotor support; 15-Retaining ring; 16-Shaped material;

[0035] 2-Heat dissipation component; 21-Support ring; 211-Slot; 212-Boss; 213-Weight reduction groove;

[0036] 22-Heat conduction strip;

[0037] 221 - Heat dissipation section; 221a - Upper heat dissipation section; 221b - Lower heat dissipation section;

[0038] 222 - Heat absorption section; 222a - Upper heat absorption section; 222b - Lower heat absorption section;

[0039] 223 - Heat dissipation channel; 224 - First sub-channel; 225 - Second sub-channel; 226 - First stepped groove;

[0040] 23-Threaded hole; 24-Threaded end cap; 25-Pressure ring; 26-First screw. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0042] Before introducing the heat sink 2, rotor assembly 1 and motor provided in the embodiments of this application, the relevant technologies of this application will be introduced first.

[0043] like Figure 1 As shown, Figure 1 This is a schematic diagram of the cooperation between the rotor winding 11 and the rotor core 12 in the related technology. Figure 1 To clearly demonstrate the mating structure, a portion of the rotor core 12 and a portion of the rotor winding 11 are shown. In related technologies, the rotor winding 11 is wound on the rotor core 12. The rotor core 12 has multiple circumferentially spaced winding slots 121. The winding slots 121 extend axially along the main shaft 13 of the motor. The rotor winding 11 includes a straight winding edge 111 disposed in the winding slot 121 and a winding end 112 located at one end of the rotor core 12. The winding end 112 includes two inclined winding edges 113. The two inclined winding edges 113 are an upper inclined edge 114 inclined in a first direction and a lower inclined edge 115 inclined in a second direction, respectively. One end of one straight winding edge 111 is connected to one end of another straight winding edge 111 sequentially through the upper inclined edge 114 and the lower inclined edge 115, as shown below. Figure 2 As shown, Figure 2 This is a partial structural schematic diagram of the rotor winding 11 in related technologies. The rotor winding 11 is wound sequentially along the circumference of the rotor core 12, such that the upper inclined sides 114 of the multiple winding inclined side groups are arranged adjacently, and the lower inclined sides 115 of the multiple winding inclined side groups are arranged adjacently, as shown below. Figure 3 As shown, Figure 3 This is a schematic diagram of the coordination of multiple winding hypotenuse groups in related technologies. The gap between two adjacent winding hypotenuses 113 is the hypotenuse gap 116.

[0044] To address issues related to corona discharge, structural support, and ventilation / heat dissipation in the rotor winding 11, related technologies employ increasing the gap between adjacent winding hypotenuses 113. This increases airflow between the two hypotenuses while maintaining electrical safety distances, thereby improving heat dissipation efficiency. However, increasing the gap between adjacent hypotenuses 113 increases the length of the winding end 112, which in turn increases the length of the hypotenuse 113. This leads to poorer motor reliability, primarily manifested in the following ways.

[0045] 1. Increasing the length of the winding end 112 will lead to an increase in the end leakage reactance of the rotor winding 11, which will have an adverse effect on the motor's operating performance (e.g., starting characteristics, short-circuit current multiple, overload capacity, stability, etc.).

[0046] 2. Increasing the length of the winding end 112 will increase the weight of the rotor winding 11 and increase the torque of the winding helix 113 of the rotor winding 11. Since the winding end 112 is located at one end of the rotor core 12 and lacks support, it is easy for the winding helix 113 to deviate from the preset position due to centrifugal force, which will reduce the mechanical strength of the motor.

[0047] 3. The increased length of the winding end 112 will lead to an increase in the heat generated by the rotor winding 11, thus increasing the heat dissipation requirements of the motor.

[0048] Based on this, embodiments of this application provide a heat sink 2, a rotor assembly 1, and a motor to improve the heat dissipation efficiency of the winding hypotenuse 113 and reduce the spacing between the winding hypotenuses 113 to reduce the length of the winding end 112, thereby improving the reliability of the motor.

[0049] The following combination Figures 4 to 12 The present application will provide a detailed description of a heat sink 2 and a motor provided in the embodiments of this application.

[0050] Please see Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the structure of the heat sink 2 provided in an exemplary embodiment of this disclosure. Figure 5 This is a schematic diagram of the cooperation between the support ring 21 and the heat-conducting strip 22 provided in an exemplary embodiment of this disclosure. In a first aspect, embodiments of this application provide a heat sink 2. The heat sink 2 includes a support ring 21 and a heat-conducting strip 22. The heat-conducting strip 22 includes a heat-dissipating section 221 and a heat-absorbing section 222 connected to each other. The heat-dissipating section 221 is connected to the end face of the support ring 21, and the heat-absorbing section 222 is located on the outer periphery of the support ring 21. There are multiple heat-conducting strips 22. The multiple heat-conducting strips 22 are arranged sequentially along the circumference of the support ring 21. The heat-absorbing section 222 is parallel to the upper inclined side 114 of the rotor winding 11, or the heat-absorbing section 222 is parallel to the lower inclined side 115 of the rotor winding 11, or a portion of the heat-conducting strips 222 have their heat-absorbing sections 222 parallel to the upper inclined side 114, and the remaining portion of the heat-conducting strips 222 have their heat-absorbing sections 222 parallel to the lower inclined side 115. That is, the heat-absorbing section 222 extends along the first direction, or the heat-absorbing section 222 extends along the second direction, or a portion of the heat-conducting strip 22's heat-absorbing section 222 extends along the first direction, and the remaining portion of the heat-conducting strip 22's heat-absorbing section 222 extends along the second direction, such as... Figure 5 As shown.

[0051] Understandably, this is to clearly demonstrate the structure of heat sink 2. Figure 4 A portion of the support ring 21 and several heat-conducting strips 22 are selected for demonstration. Figure 5 A portion of the support ring 21 and a heat-conducting strip 22 are shown for demonstration.

[0052] It is understood that the support ring 21 is sleeved on the motor spindle 13. The support ring 21 can be directly connected to the spindle 13, or it can be connected to the spindle 13 through other components. As a support for the heat sink 2, the support ring 21 stably fixes the heat conduction strip 22 to the spindle 13.

[0053] It is understandable that the heat dissipation section 221 can be glued to the support ring 21, fixed to the support ring 21 by screws or other components, or snapped onto the support ring 21.

[0054] Specifically, the heat dissipation section 221 is located on the end face of the support ring 21 facing away from the rotor core 12. In this way, the heat-conducting strip 22 can be installed in the axial direction of the motor to facilitate the control of the radial dimension of the motor.

[0055] It can be understood that the inclined side 113 of the rotor winding 11 is thermally coupled to the heat-absorbing section 222, so that the heat is absorbed by the heat-absorbing section 222. Figure 6 As shown, Figure 6 This is a schematic diagram of the heat sink 2 and several winding inclined sides assemblies provided in an exemplary embodiment of this disclosure. The heat absorption section 222 is located between the winding inclined sides 113, and it absorbs heat, serving as the hot end of the heat-conducting strip 22. After absorbing heat, the heat absorption section 222 can transfer the heat to the heat dissipation section 221. The heat dissipation section 221 is located at one end of the winding inclined side 113, and it dissipates heat outward, serving as the cold end. The heat from the heat dissipation section 221 is carried away by the motor's ventilation system through air convection, thereby cooling the rotor winding 11.

[0056] Thermal coupling refers to the method of heat transfer between two different components through contact. The heat-absorbing section 222 can be connected to the winding bevel 113 by applying thermally conductive adhesive or by potting adhesive.

[0057] It can be understood that when the heat-absorbing section 222 is parallel to the extension direction of the upper inclined side 114 of the rotor winding 11, the heat-absorbing section 222 is thermally coupled to the upper inclined side 114. When the heat-absorbing section 222 is parallel to the extension direction of the lower inclined side 115 of the rotor winding 11, the heat-absorbing section 222 is thermally coupled to the lower inclined side 115.

[0058] It is understood that the heat-conducting strip 22 is made of a non-magnetic thermally conductive material. Examples include copper, aluminum, silver, carbon fiber, graphene, and ceramic materials. These thermally conductive materials absorb heat from the inclined edge 113 of the winding and dissipate heat from the rotor winding 11. Simultaneously, a flow channel filled with a heat exchange medium can be provided inside the heat-conducting strip 22 to rapidly absorb heat from the inclined edge 113 of the winding, improving heat dissipation efficiency. Correspondingly, the heat exchange medium can be a phase change material. In this way, the phase transition process of the phase change material can absorb a large amount of heat.

[0059] In this embodiment, the heat dissipation section 221 cools the winding helical side 113 of the rotor winding 11. This not only solves the problems of corona discharge and heat dissipation at the winding end 112, but also makes the heat dissipation of the winding helical side 113 more direct and faster, thereby reducing the gap between adjacent winding helical sides 113 and thus reducing the length of the winding end 112. This reduces end leakage reactance and heat generation at the winding end 112, improving motor performance, and also reduces the weight of the winding end 112, reducing torque during motor operation and improving mechanical strength. Simultaneously, the heat-conducting strip 22 supports the winding end 112, improving its positional stability and ensuring synchronization between the rotor winding 11 and the main shaft 13. Ultimately, this improves motor reliability.

[0060] Please see Figures 7 to 9 , Figure 7 This is a schematic diagram of the structure of the heat-conducting strip 22 provided in an exemplary embodiment of this disclosure. Figure 8 This is a side view of the heat-conducting strip 22 provided in an exemplary embodiment of this disclosure. Figure 9 yes Figure 8 A cross-sectional view of AAA is shown. In some embodiments, the heat-conducting strip 22 has a heat dissipation channel 223. The ends of the heat dissipation channel 223 are connected. A portion of the heat dissipation channel 223 is disposed in the heat dissipation section 221. Another portion is disposed in the heat absorption section 222. The heat dissipation channel 223 is used to fill the heat exchange medium.

[0061] The heat exchange medium is selected from materials with good heat transfer performance, corrosion resistance, and anti-coking ability. For example, the heat exchange medium can be a single-phase fluid such as deionized water or low-temperature heat transfer oil, or a phase change working fluid with stable thermal properties.

[0062] It is understood that the heat absorption section 222 is located between the inclined sides of the winding 113 and has a higher temperature. The heat dissipation section 221 is located at one end of the inclined side of the winding 113 and does not contact the rotor winding 11, so its temperature is lower. Therefore, there is a temperature difference between the cold end and the hot end. Thus, a structural temperature difference is formed on the heat-conducting strip 22. Driven by the structural temperature difference, the Joule heat of the inclined side of the winding 113 is transferred sequentially to the hot end and the cold end, and finally carried away by the motor ventilation system through the convection of cold air on the surface of the heat dissipation section 221, thereby achieving the cooling of the inclined side of the winding 113.

[0063] Taking the rotor of a large-capacity variable-speed generator motor as an example, the minimum circumferential linear velocity of the heat-conducting strip 22 is 80 m / s, and the distance between the heat-conducting strip 22 and the center of the main shaft is not less than 2 m, the following explanation is provided.

[0064] The minimum acceleration of the heat exchange medium within the heat dissipation channel 223 due to inertial force (i.e., centrifugal force of the rotating field) is:

[0065]

[0066] In an inertial force field, the intensity of natural convective heat transfer in the heat transfer medium is measured by the Grashof number Gr, which is directly proportional to the inertial acceleration.

[0067] (Formula 2);

[0068] Where β is the fluid's volumetric expansion coefficient (unit: K). -1 The value (C) represents the degree to which the fluid volume changes with temperature, reflecting the effect of temperature changes on fluid density, and thus affecting the intensity of natural convection.

[0069] Next, substituting the inertial acceleration 'a' of the rotor rotation of the large-capacity variable-speed generator obtained from Formula 1 into Formula 2, it can be seen that the natural convection intensity of the heat transfer medium within the heat-conducting strip 22 is at least 10 times the natural convection intensity in a standard gravitational field. 2 The heat transfer capacity is increased by several times. Due to the radial positional difference (heat dissipation section 221 is located on the end face of support ring 21, and heat absorption section 222 is located on the outer periphery of support ring 21) and temperature difference (heat absorption section 222 is located between the inclined sides of the winding and absorbs heat, while heat dissipation section 221 is located outside the inclined sides of the winding and dissipates heat) between the cold and hot ends of the heat-conducting strip 22, and the heat dissipation channels 223 are connected end to end, the heat exchange medium will establish a spontaneous and stable flow circulation based on thermal buoyancy, thereby significantly improving the heat transfer capacity of the heat-conducting strip 22.

[0070] Specifically, simulation analysis using fluid analysis software (e.g., ANSYS CFD, or ANSYS fluent) yields the following results: when deionized water is selected as the heat exchange medium, the thermal conductivity of the heat transfer strip 22 is close to 4000 W / m / K, which is 20 times that of aluminum when aluminum is selected as the heat transfer medium; when phase change working fluid is selected as the heat exchange medium, its thermal conductivity can be increased to 6000 W / m / K, which is 30 times that of aluminum when aluminum is selected as the heat transfer strip 22.

[0071] In related technologies, to meet the cooling requirements of the winding end 112, the bevel gap 116 needs to be designed to be at least 5mm to provide sufficient airflow width. However, in this embodiment, since the boundary layer thickness of the heat exchange medium is significantly less than that of air, a heat dissipation channel 223 width of 1-2mm is sufficient to meet the heat dissipation requirements of the winding bevel 113. The wall thickness of the heat dissipation channel 223 is 0.5mm-1mm. Therefore, the required installation gap for the heat-conducting strip 22 is 2-4mm. Figure 10 As shown, Figure 10 This is a comparison diagram of the gap between the winding bevels 113 in related technologies and the gap between the winding bevels 113 of the heat sink 2 provided in the exemplary embodiment of this disclosure. Figure 10 In the diagram, (a) shows a schematic diagram of the layout of the winding inclined side 113 in the relevant pole, and (b) shows a schematic diagram of the winding inclined side 113 using the heat sink 2 provided in this embodiment. Based on the consistent span L3 of the winding end 112, the inclined side gap 116 in the related technology is larger due to ventilation and heat dissipation requirements. Correspondingly, the length L1 of the winding inclined side 113 in the related technology is larger. In this embodiment, due to the arrangement of the heat sink 2, the inclined side gap 116 is smaller. Correspondingly, the length L2 of the winding inclined side 113 using the heat sink 2 provided in this embodiment is smaller.

[0072] Therefore, in this embodiment, by providing a heat dissipation channel 223 that can be filled with heat exchange medium within the heat-conducting strip 22, the thermal conductivity of the heat-conducting strip 22 can be improved, thereby enhancing the heat dissipation efficiency of the heat-conducting strip 22. This reduces the bevel gap 116, thereby achieving the goal of reducing the length of the winding end 112.

[0073] Please see Figure 9In some embodiments, the heat dissipation channel 223 includes two first sub-channels 224 and two second sub-channels 225. The two ends of the two first sub-channels 224 are respectively disposed at the heat dissipation section 221 and the heat absorption section 222. The two second sub-channels 225 are located between the two first sub-channels 224. The two ends of the two second sub-channels 225 are respectively disposed at the heat dissipation section 221 and the heat absorption section 222. The ends of the two first sub-channels 224 at the heat dissipation section 221 are interconnected. The ends of the two second sub-channels 225 at the heat dissipation section 221 are interconnected. The ends of the two first sub-channels 224 at the heat absorption section 222 are respectively connected to the ends of the two second sub-channels 225 at the heat absorption section 222. In this way, multi-layer flow of the heat exchange medium can be achieved within the heat-conducting strip 22, thereby improving the heat dissipation efficiency of the heat-conducting strip 22.

[0074] Please see Figure 9 In some embodiments, the heat-conducting strip 22 is provided with a threaded hole 23. The threaded hole 23 communicates with the heat dissipation channel 223. The heat sink 2 also includes a threaded end cap 24, which is threadedly connected to the threaded hole 23.

[0075] Specifically, the threaded hole 23 is provided in the heat dissipation section 221. For example, the threaded hole 23 is provided on the end face of the heat dissipation section 221 facing the spindle 13.

[0076] In this embodiment, by providing threaded hole 23 and threaded end cap 24, not only can heat exchange medium be added to heat dissipation channel 223 through threaded hole 23, but heat exchange medium leakage can also be effectively avoided, and subsequent maintenance is facilitated.

[0077] Please see Figure 4 In some embodiments, the heat sink 2 further includes a clamping ring 25 and a first screw 26. The axis of the clamping ring 25 is parallel to the axis of the support ring 21. The clamping ring 25 is located on the side of the heat sink section 221 opposite to the support ring 21. The end of the shank of the first screw 26 passes through the clamping ring 25 and is threaded into the support ring 21. In this way, the heat sink section 221 can be fixed to the end face of the support ring 21 by the clamping ring 25, which helps to improve the reliability of the connection between the support ring 21 and the heat-conducting strip 22.

[0078] It is understood that when the heat sink 2 includes the second heat-conducting strip 22, the second segment is located between the clamping ring 25 and the support ring 21. The second segment is fixed to the end face of the support ring 21 by the clamping ring 25.

[0079] Please see Figure 5 In some embodiments, a plurality of slots 211 are provided on the support ring 21. One side of the heat dissipation section 221 is inserted into the slot 211, and the other side abuts against the clamping ring 25.

[0080] It can be understood that the slot 211 is a through-slot structure that extends radially along the support ring 21.

[0081] It is understandable that the two side walls of the slot 211 restrict the movement of the heat-conducting strip 22 in the circumferential direction of the support ring 21, and the combination of the clamping ring 25 and the support ring 21 restricts the movement of the heat-conducting strip 22 in the radial direction and the axial direction of the support ring 21.

[0082] In this embodiment, by setting the slot 211, the heat conduction strip 22 can be detachably mounted on the support ring 21, which can improve the assembly efficiency of the heat sink 2 and the maintenance convenience of the heat sink 2.

[0083] Please see Figure 7 and 11 , Figure 11 yes Figure 5 A cross-sectional view of section BB. A first stepped groove 226 is provided on the side of the heat dissipation section 221 facing the clamping ring 25. The inner ring surface of the clamping ring 25 abuts against one side wall of the first stepped groove 226. In this way, the heat-conducting strip 22 is stopped and engaged by the clamping ring 25, thereby restricting the movement of the heat-conducting strip 22 in the radial direction of the support ring 21, so as to improve the positional stability of the heat-conducting strip 22.

[0084] The inner ring surface of the clamping ring 25 abuts against one side of the groove wall of the first stepped groove 226 to prevent the heat-conducting strip 22 from moving outward along the radial direction of the support ring 21; the heat-absorbing section 222 is located on the outer periphery of the support ring 21 to cooperate with the support ring 21 to prevent the heat-conducting strip 22 from moving inward along the radial direction of the support ring 21.

[0085] Please see Figure 11 In some embodiments, a boss 212 protrudes from the surface of the support ring 21 facing the heat dissipation section 221. A portion of the surface of the heat dissipation section 221 facing the support ring 21 is connected to the boss 212, while the remaining portion is spaced apart from the support ring 21. This creates a ventilation channel between the heat dissipation section 221 and the support ring 21, facilitating airflow and increasing the heat dissipation area of ​​the heat dissipation section 221. This, in turn, improves the heat dissipation efficiency of the heat-conducting strip 22.

[0086] Please see Figure 5 or Figure 11 In some embodiments, a weight-reducing groove 213 is provided on the inner circumferential surface of the support ring 21. The weight-reducing groove 213 extends circumferentially along the support ring 21. In this way, the material used in the support ring 21 can be reduced, which helps to reduce the weight of the support ring 21 and thus helps to control the weight of the motor.

[0087] Please see Figure 4 or Figure 5In some embodiments, a portion of the heat-absorbing section 222 of the heat-conducting strip 22 is parallel to the upper inclined side 114, while the remaining portion of the heat-absorbing section 222 of the heat-conducting strip 22 is parallel to the lower inclined side 115. Along the circumference of the support ring 21, the heat dissipation sections 221 connected to the heat-absorbing sections 222 parallel to the lower inclined side 115 and the heat dissipation sections 221 connected to the heat-absorbing sections 222 parallel to the upper inclined side 114 are sequentially and alternately distributed. The heat-absorbing sections 222 parallel to the lower inclined side 115 are located between the heat-absorbing sections 222 parallel to the upper inclined side 114.

[0088] Specifically, the heat-absorbing section 222 parallel to the upper inclined side 114 is defined as the upper heat-absorbing part 222a, the heat-absorbing section 222 parallel to the lower inclined side 115 is defined as the lower heat-absorbing part 222b, the heat-dissipating section 221 connected to the upper heat-absorbing part 222a is defined as the upper heat-dissipating section 221a, and the heat-dissipating section 221 connected to the lower heat-absorbing part 222b is defined as the lower heat-dissipating section 221b. The upper heat-conducting parts are arranged sequentially at intervals along the circumference of the support ring 21. The upper inclined edges 114 and the upper heat-conducting parts are staggered along the circumference of the support ring 21, and each upper inclined edge 114 is thermally coupled to its corresponding upper heat-conducting part. The lower heat-conducting parts are arranged sequentially at intervals along the circumference of the support ring 21. The lower inclined edges 115 and the lower heat-conducting parts are staggered along the circumference of the support ring 21, and each lower inclined edge 115 is thermally coupled to its corresponding lower heat-conducting part. The upper heat dissipation section 221a and the lower heat dissipation section 221b are arranged sequentially and staggered along the circumference of the support ring 21, such as... Figure 6 As shown.

[0089] In this embodiment, the above-mentioned arrangement allows the upper inclined edge 114 and the lower inclined edge 115 to be isolated from the air medium by the upper heat absorption part 222a and the lower heat absorption part 222b, respectively, which helps to improve the heat dissipation efficiency of the rotor winding 11.

[0090] Please see Figure 12 , Figure 12 This is a partial structural schematic diagram of the rotor assembly 1 provided in an exemplary embodiment of this disclosure. In a second aspect, embodiments of this application provide a rotor assembly 1. The rotor assembly 1 includes a main shaft 13, a rotor support 14, a rotor core 12, rotor windings 11, and the aforementioned heat sink 2. The rotor support 14 is sleeved on the main shaft 13. The rotor core 12 is sleeved on the rotor support 14. A winding groove 121 is provided on the side of the rotor core 12 facing away from the main shaft 13. The rotor windings 11 include a connected straight winding edge 111 and a winding inclined edge group. The straight winding edge 111 is disposed in the winding groove 121. The winding inclined edge group is located at one end of the rotor core 12. A support ring 21 is sleeved on the main shaft 13 and located at one end of the rotor core 12. The winding inclined edge group is thermally coupled to the heat absorption section 222.

[0091] It is understood that the rotor assembly 1 includes the aforementioned heat sink 2. The rotor assembly 1 has all the beneficial effects of the aforementioned heat sink 2, which will not be elaborated further in this disclosure.

[0092] Specifically, the heat-conducting strip 22 is attached to the winding end 112, that is, each upper inclined edge 114 is attached to its corresponding upper heat-conducting part, and each lower inclined edge 115 is attached to its corresponding lower heat-conducting part. Furthermore, one side of each upper inclined edge 114 is attached to its corresponding upper heat-conducting part, and the other side abuts against another adjacent upper heat-conducting part through a conformal material. Simultaneously, potting compound can be used to fill the gaps to eliminate the gaps between the heat-conducting strip 22 and the winding inclined edges 113, thus solidifying the rotor core 12, rotor winding 11, and heat sink 2 into a single unit.

[0093] The rotor assembly 1 also includes a retaining ring 15. The retaining ring 15 is wound around the inclined side 113 of the winding. The inclined side 113 of the winding is located between the retaining ring 15 and the support ring 21. In this way, the inclined side 113 of the winding is supported and limited by the retaining ring 15 and the support ring 21, preventing it from deviating from the preset position due to centrifugal force.

[0094] Thirdly, embodiments of this application provide an electric motor that includes the aforementioned rotor assembly 1.

[0095] It is understood that the motor also includes a housing and a stator assembly. The rotor assembly 1 is housed within the housing, and the main shaft 13 is rotatably coupled to the housing via bearings. The stator assembly is fixed within the housing and fitted over the rotor assembly 1. There is an air gap between the stator assembly and the rotor assembly 1.

[0096] It is understood that the motor includes the rotor assembly 1 described above. The motor has all the beneficial effects of the rotor assembly 1 described above, which will not be repeated here.

[0097] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0098] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0099] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0100] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A heat sink (2), characterized in that, include: Support ring (21); as well as, The heat-conducting strip (22) includes a heat dissipation section (221) and a heat absorption section (222) connected to each other. The heat dissipation section (221) is connected to the end face of the support ring (21), and the heat absorption section (222) is located on the outer periphery of the support ring (21). There are multiple heat-conducting strips (22), and the multiple heat-conducting strips (22) are arranged sequentially along the circumference of the support ring (21); The heat-absorbing section (222) is parallel to the upper inclined side (114) of the rotor winding (11), or the heat-absorbing section (222) is parallel to the lower inclined side (115) of the rotor winding (11), or a portion of the heat-absorbing section (222) of the heat-conducting strip (22) is parallel to the upper inclined side (114), and the remaining portion of the heat-absorbing section (222) of the heat-conducting strip (22) is parallel to the lower inclined side (115); The heat-conducting strip (22) has a heat dissipation channel (223), a portion of which is disposed in the heat dissipation section (221) and another portion of which is disposed in the heat absorption section (222); The heat dissipation channel (223) is used to fill the heat exchange medium; The heat dissipation channel (223) includes two first sub-channels (224) and two second sub-channels (225). The two ends of the two first sub-channels (224) are respectively disposed in the heat dissipation section (221) and the heat absorption section (222). The two second sub-channels (225) are located between the two first sub-channels (224), and the two ends of the two second sub-channels (225) are respectively disposed in the heat dissipation section (221) and the heat absorption section (222). The two first sub-channels (224) are interconnected at the ends of the heat dissipation section (221), the two second sub-channels (225) are interconnected at the ends of the heat dissipation section (221), and the ends of the two first sub-channels (224) in the heat absorption section (222) are respectively connected to the ends of the two second sub-channels (225) in the heat absorption section (222). The portions of the first sub-channel (224) and the second sub-channel (225) near the heat dissipation section (221) both extend radially along the support ring (21).

2. The heat sink (2) according to claim 1, characterized in that, The heat-conducting strip (22) is provided with a threaded hole (23), which is connected to the heat dissipation channel (223). The heat dissipation component (2) also includes a threaded end cap (24), which is threadedly connected to the threaded hole (23).

3. The heat sink (2) according to claim 1, characterized in that, The heat sink (2) also includes a clamping ring (25) and a first screw (26). The axis of the clamping ring (25) is parallel to the axis of the support ring (21). The clamping ring (25) is located on the side of the heat sink section (221) away from the support ring (21). The end of the shank of the first screw (26) passes through the clamping ring (25) and is threaded to the support ring (21).

4. The heat sink (2) according to claim 3, characterized in that, Multiple slots (211) are provided on the support ring (21). One side of the heat dissipation section (221) is inserted into the slot (211), and the other side abuts against the clamping ring (25).

5. The heat sink (2) according to claim 3, characterized in that, A first stepped groove (226) is provided on the side of the heat dissipation section (221) facing the clamping ring (25), and the inner ring surface of the clamping ring (25) abuts against one side wall of the first stepped groove (226).

6. The heat sink (2) according to any one of claims 1-5, characterized in that, The support ring (21) has a boss (212) protruding from the surface facing the heat dissipation section (221). A portion of the surface of the heat dissipation section (221) facing the support ring (21) is connected to the boss (212), and the remaining portion is spaced apart from the support ring (21). And / or, a weight-reducing groove (213) is provided on the inner ring surface of the support ring (21), the weight-reducing groove (213) extending circumferentially along the support ring (21).

7. The heat sink (2) according to any one of claims 1-5, characterized in that, A portion of the heat-absorbing section (222) of the heat-conducting strip (22) is parallel to the upper inclined edge (114), while the remaining portion of the heat-absorbing section (222) of the heat-conducting strip (22) is parallel to the lower inclined edge (115). Along the circumference of the support ring (21), the heat dissipation section (221) connected to the heat absorption section (222) parallel to the lower inclined side (115) and the heat dissipation section (221) connected to the heat absorption section (222) parallel to the upper inclined side (114) are alternately distributed, and the heat absorption section (222) parallel to the lower inclined side (115) is located between the heat absorption sections (222) parallel to the upper inclined side (114).

8. A rotor assembly (1), characterized in that, include Main spindle (13); The rotor support (14) is sleeved on the main shaft (13); The rotor core (12) is sleeved on the rotor support (14), and the rotor core (12) has a winding groove (121) on the side away from the main shaft (13); The rotor winding (11) includes a straight winding edge (111) and a winding inclined edge group connected to each other. The straight winding edge (111) is disposed in the winding slot (121), and the winding inclined edge group is located at one end of the rotor core (12). In the heat sink (2) as described in any one of claims 1-7, the support ring (21) is sleeved on the main shaft (13) and located at one end of the rotor core (12), and the winding inclined side group is thermally coupled to the heat absorption section (222).

9. An electric motor, characterized in that, Includes the rotor assembly (1) as described in claim 8.

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