Heat dissipation piece, rotor assembly and motor

Abstract

The invention relates to a heat dissipation piece, a rotor assembly and a motor. The heat dissipation piece comprises a supporting ring and heat conduction strips. The heat conduction strip comprises a heat dissipation section and a heat absorption section which are connected, the heat dissipation section is connected with the end face of the supporting ring, and the heat absorption section is located on the peripheral side of the supporting ring; the multiple heat conduction strips are sequentially arranged in the circumferential direction of the supporting ring. And the heat absorption section is parallel to the winding bevel edge of the rotor winding. According to the scheme, on the basis that the problems of corona discharge, heat dissipation and the like of the winding end are solved, the heat dissipation mode of the winding bevel edges can be more direct and rapid, and therefore the gap between every two adjacent winding bevel edges can be reduced, and the length of the winding end is reduced. Therefore, the leakage reactance of the end part and the heat productivity of the winding end part can be reduced, and the weight of the winding end part can be reduced, so that the mechanical strength of the motor can be improved; and meanwhile, the winding end part can be supported through the heat conduction strip, so that the position stability of the winding end part can be improved. Finally, the reliability of the motor can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a heat sink, a rotor assembly and a motor. Background Art

[0002] A 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 motor that can be used as both a generator and a motor. The motor mainly includes a housing, a stator assembly fixed in the housing, and a rotor assembly rotatably disposed in the housing. The rotor assembly includes a main shaft, an iron core sleeved on the main shaft, and a rotor winding wound around the rotor core.

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

[0004] The embodiment of the present application provides a heat sink, which can improve the heat dissipation efficiency of the motor to at least solve the above-mentioned technical problem.

[0005] In order to achieve the above-mentioned purpose, according to a first aspect of the present application, a heat sink is provided, which includes a support ring and a heat-conducting strip; the heat-conducting strip includes a heat-dissipating section and a heat-absorbing section connected to each other, the heat-dissipating section is connected to the end surface of the support ring, and the heat-absorbing section is located on the outer peripheral side of the support ring; there are multiple heat-conducting strips, and the multiple heat-conducting strips are arranged in sequence along the circumference of the support ring; wherein the heat-absorbing section is parallel to the upper bevel of the rotor winding, or the heat-absorbing section is parallel to the lower bevel of the rotor winding, or the heat-absorbing section of a part of the heat-conducting strips is parallel to the upper bevel, and the heat-absorbing section of the remaining part of the heat-conducting strips is parallel to the lower bevel.

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

[0007] Optionally, the heat dissipation channel includes two first sub-channels and two second sub-channels, the two first sub-channels have two ends respectively arranged at 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 arranged at the heat dissipation section and the heat absorption section; wherein the ends of the two first sub-channels located at the heat dissipation section are connected to each other, the ends of the two second sub-channels located at the heat dissipation section are connected to each other, and the ends of the two first sub-channels located at the heat absorption section are respectively connected to the ends of the two second sub-channels located at the heat absorption section; And / or, a threaded hole is provided on the heat conducting strip, the threaded hole is communicated with the heat dissipation channel, and the heat dissipation component further includes a threaded head, which is threadedly connected to the threaded hole.

[0008] 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 dissipation section away from the support ring, and the rod end of the first screw passes through the clamping ring and is threadedly connected to the support ring.

[0009] Optionally, a plurality of slots are provided on the support ring, one side of the heat dissipation section is inserted into the slot, and the other side abuts against the clamping ring.

[0010] Optionally, a first stepped groove is provided on a side of the heat dissipation section facing the clamping ring, and an inner ring surface of the clamping ring abuts against a groove wall on one side of the first stepped groove.

[0011] 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 annular surface of the support ring, and the weight-reducing groove extends along the circumference of the support ring.

[0012] Optionally, the heat absorption sections of a part of the heat conductive strips are parallel to the upper bevel, and the heat absorption sections of the remaining part of the heat conductive strips are parallel to the lower bevel; wherein, along the circumference of the support ring, the heat dissipation sections connected to the heat absorption sections parallel to the lower bevel and the heat dissipation sections connected to the heat absorption sections parallel to the upper bevel are alternately distributed in sequence, and the heat absorption sections parallel to the lower bevel are located between the heat absorption sections parallel to the upper bevel.

[0013] According to a second aspect of the present application, a rotor assembly is provided, which includes a main shaft, a rotor support, a rotor core, a rotor winding 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 facing away from the main shaft; the rotor winding includes a connected winding straight edge and a winding bevel group, the winding straight edge is provided in the winding groove, and the winding bevel group is located at one end of the rotor core; the support ring is sleeved on the main shaft and is located at one end of the rotor core, and the winding bevel group is thermally coupled with the heat absorption section.

[0014] According to a third aspect of the present application, a motor is provided, the motor comprising the aforementioned rotor assembly, In the heat sink of the embodiment of the present application, the heat dissipation section is used to dissipate heat and cool the winding bevel of the rotor winding. On the basis of solving the problems of corona discharge and heat dissipation at the winding end, the heat dissipation method of the winding bevel can be made more direct and rapid, thereby reducing the gap between two adjacent winding bevels, and further achieving the purpose of reducing the length of the winding end. In this way, the end leakage resistance and the heat generated by the winding end can be reduced, which is beneficial to improving the operating performance of the motor, and the weight of the winding end can be reduced, which is beneficial to reducing the torque of the winding end when the motor is working, thereby improving the mechanical strength of the motor; at the same time, the winding end can also be supported by a heat conductive strip, which is beneficial to improving the position stability of the winding end, thereby ensuring the synchronization between the rotor winding and the main shaft. Finally, the reliability of the motor can be improved.

[0015] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0017] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0018] Figure 1 It is a schematic diagram of the coordination between the rotor winding and the rotor core in the related art; Figure 2 It is a schematic diagram of the local structure of the rotor winding in the related art; Figure 3 It is a schematic diagram of the coordination of multiple winding bevel groups in the related art; Figure 4 is a schematic structural diagram of a heat sink provided in an exemplary embodiment of the present disclosure; Figure 5 is a schematic diagram of the cooperation between the support ring and the thermally conductive strip provided in an exemplary embodiment of the present disclosure; Figure 6 is a schematic diagram of the cooperation between the heat sink and the winding bevel group provided in an exemplary embodiment of the present disclosure; Figure 7 is a schematic structural diagram of a thermally conductive strip provided in an exemplary embodiment of the present disclosure; Figure 8 is a side view of a thermally conductive strip provided in an exemplary embodiment of the present disclosure; Fig. 9 yes Figure 8 Schematic diagram of the cross-sectional structure of AAA; Fig.10 is a comparison diagram of the gap between the oblique edges of the winding wires in the related art and the gap between the oblique edges of the winding wires of the heat sink provided in the exemplary embodiment of the present disclosure; Fig.11 yes Figure 5 Cross-sectional view of the middle BB; Fig.12 Schematic diagram of a partial structure of a rotor assembly provided in an exemplary embodiment of the present disclosure.

[0019] Description of reference numerals: 1- rotor assembly; 11- rotor winding; 111- winding straight edge; 112- winding end; 113- winding bevel edge; 114- upper bevel edge; 115- lower bevel edge; 116- bevel edge gap; 12- rotor core; 121- winding slot; 13- main shaft; 14- rotor bracket; 15- guard ring; 16- profiling material; 2-heat sink; 21-support ring; 211-slot; 212-boss; 213-weight reduction slot; 22- thermally conductive strip; 221- heat dissipation section; 221a- upper heat dissipation section; 221b- lower heat dissipation section; 222-heat absorbing section; 222a-upper heat absorbing section; 222b-lower heat absorbing section; 223-heat dissipation channel; 224-first sub-channel; 225-second sub-channel; 226-first stepped groove; 23-threaded hole; 24-threaded head; 25-clamping ring; 26-first screw. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0021] Before introducing a heat sink 2, a rotor assembly 1 and a motor provided in an embodiment of the present application, the related technologies of the present application are first introduced.

[0022] like Figure 1 As shown, Figure 1 It is a schematic diagram of the cooperation between the rotor winding 11 and the rotor core 12 in the related art. Figure 1 In order to clearly display the matching structure, a part of the rotor core 12 and a part of the rotor winding 11 are selected for display. In the related art, the rotor winding 11 is wound on the rotor core 12. The rotor core 12 is provided with a plurality of winding grooves 121 spaced apart along the circumferential direction. The winding grooves 121 extend axially along the main shaft 13 of the motor. The rotor winding 11 includes a winding straight edge 111 provided in the winding grooves 121 and a winding end 112 located at one end of the rotor core 12. The winding end 112 includes two winding beveled edges 113. The two winding beveled edges 113 are respectively an upper beveled edge 114 inclined along a first direction and a lower beveled edge 115 inclined along a second direction. One end of a winding straight edge 111 is connected to one end of another winding straight edge 111 through the upper beveled edge 114 and the lower beveled edge 115 in sequence, as shown in FIG. Figure 2 As shown, Figure 2 1 is a partial structural diagram of a rotor winding 11 in the related art. The rotor winding 11 is sequentially wound along the circumference of the rotor core 12, so that the upper bevels 114 of the plurality of winding bevel groups are arranged adjacent to each other, and the lower bevels 115 of the plurality of winding bevel groups are arranged adjacent to each other, such as Figure 3 As shown, Figure 3 The gap between two adjacent winding bevels 113 is a bevel gap 116 .

[0023] In order to solve the problems of corona discharge, structural support, ventilation and heat dissipation of the rotor winding 11, the relevant technology adopts the method of increasing the gap between two adjacent winding bevels 113, so that the rotor winding 11 can increase the air flow between two adjacent winding bevels 113 on the basis of meeting the electrical safety distance, so as to improve the heat dissipation efficiency of the rotor winding 11. When the gap between two adjacent winding bevels 113 is increased, the length of the winding end 112 will be increased, that is, the length of the winding bevel 113 will be increased. In this way, the reliability of the motor is poor. This is mainly manifested in the following aspects.

[0024] 1. The increase in the length of the winding end 112 will increase the leakage resistance at the end of the rotor winding 11, which will have an adverse effect on the running performance of the motor (for example, starting characteristics, short-circuit current multiples, overload capacity, stability, etc.); 2. The increase in the length of the winding end 112 will increase the weight of the rotor winding 11 and increase the torque of the winding bevel 113 of the rotor winding 11. Since the winding end 112 is located at one end of the rotor core 12 and lacks support, the winding bevel 113 is easily deviated from the preset position due to the centrifugal force, which will reduce the mechanical strength of the motor. 3. The increase in the length of the winding end 112 will cause the heat generated by the rotor winding 11 to increase, thereby increasing the heat dissipation requirements of the motor.

[0025] Based on this, an embodiment of the present application provides a heat sink 2, a rotor assembly 1 and a motor to improve the heat dissipation efficiency of the winding bevels 113, and can reduce the spacing between the winding bevels 113 to reduce the length of the winding end 112, thereby improving the reliability of the motor.

[0026] The following combination Figures 4 to 12 , a heat sink 2 and a motor provided in an embodiment of the present application are described in detail respectively.

[0027] See also Figure 4 and Figure 5 , Figure 4 is a schematic structural diagram of a heat sink 2 provided in an exemplary embodiment of the present disclosure, Figure 5It is a schematic diagram of the cooperation between the support ring 21 and the thermally conductive strip 22 provided in the exemplary embodiment of the present disclosure. In the first aspect, an embodiment of the present application provides a heat sink 2. The heat sink 2 includes a support ring 21 and a thermally conductive strip 22. The thermally conductive 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 peripheral side of the support ring 21. There are multiple thermally conductive strips 22. Multiple thermally conductive strips 22 are arranged in sequence along the circumference of the support ring 21. Among them, the heat absorption section 222 is parallel to the upper layer bevel 114 of the rotor winding 11, or, the heat absorption section 222 is parallel to the lower layer bevel 115 of the rotor winding 11, or, the heat absorption section 222 of a part of the thermally conductive strip 22 is parallel to the upper layer bevel 114, and the heat absorption section 222 of the remaining part of the thermally conductive strip 22 is parallel to the lower layer bevel 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 the heat absorbing section 222 of a part of the heat conducting strip 22 extends along the first direction, and the heat absorbing section 222 of the remaining part of the heat conducting strip 22 extends along the second direction. Figure 5 shown.

[0028] It can be understood that in order to clearly show the structure of the heat sink 2, Figure 4 A portion of the support ring 21 and several heat conducting strips 22 are selected for display. Figure 5 A portion of the support ring 21 and a heat conducting strip 22 are selected for illustration.

[0029] It can be understood that the support ring 21 is sleeved on the main shaft 13 of the motor. The support ring 21 can be directly connected to the main shaft 13, or can be connected to the main shaft 13 through other components. The support ring 21 serves as a support for the heat sink 2, and it stably fixes the heat conducting strip 22 on the main shaft 13.

[0030] It can be understood that the heat dissipation section 221 can be adhered to the support ring 21, can be fixed to the support ring 21 by means of screws or other components, or can be snap-connected to the support ring 21.

[0031] Specifically, the heat dissipation section 221 is located on the end surface of the support ring 21 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 controlling the radial dimension of the motor.

[0032] It can be understood that the winding bevel 113 of the rotor winding 11 is thermally coupled to the heat absorbing section 222 so that the heat of the winding bevel 113 is absorbed by the heat absorbing section 222. Figure 6 As shown, Figure 6Schematic diagram of the cooperation between the heat sink 2 and several winding bevel groups provided in the exemplary embodiment of the present disclosure. The heat absorbing section 222 is located between the winding bevels 113, which absorbs heat and is the hot end of the heat conducting strip 22. After the heat absorbing section 222 absorbs heat, it can transfer the heat to the heat dissipation section 221. The heat dissipation section 221 is located at one end of the winding bevel 113, which dissipates heat outward and is the cold end. The heat of the heat dissipation section 221 is taken away by the ventilation system of the motor through air convection to dissipate heat and cool the rotor winding 11.

[0033] Thermal coupling refers to a 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 thermal conductive glue or by potting glue.

[0034] It can be understood that when the heat absorption section 222 is parallel to the extension direction of the upper layer bevel 114 of the rotor winding 11, the heat absorption section 222 is thermally coupled with the upper layer bevel 114. When the heat absorption section 222 is parallel to the extension direction of the lower layer bevel 115 of the rotor winding 11, the heat absorption section 222 is thermally coupled with the lower layer bevel 115.

[0035] It can be understood that the heat conducting strip 22 is a non-magnetic heat conducting material. For example, copper material, aluminum material, silver material, carbon fiber, graphene and ceramic material. The heat of the winding bevel 113 is absorbed by these heat conducting materials, and the rotor winding 11 is dissipated and cooled. At the same time, a flow channel filled with a heat exchange medium can be provided inside the heat conducting strip 22 to quickly absorb the heat of the winding bevel 113 through the heat exchange medium, thereby improving the heat dissipation efficiency. Correspondingly, the heat exchange medium can be a phase change material. In this way, a large amount of heat can be absorbed by utilizing the phase transition process of the phase change material.

[0036] In this embodiment, the heat dissipation section 221 is used to dissipate heat and cool the winding bevel 113 of the rotor winding 11. On the basis of solving the problems of corona discharge and heat dissipation of the winding end 112, the heat dissipation method of the winding bevel 113 can be made more direct and rapid, thereby reducing the gap between two adjacent winding bevels 113, and then achieving the purpose of reducing the length of the winding end 112. In this way, the end leakage resistance and the heat generated by the winding end 112 can be reduced, so as to improve the operating performance of the motor, and the weight of the winding end 112 can be reduced, so as to reduce the torque of the winding end 112 when the motor is working, so as to improve the mechanical strength of the motor; at the same time, the winding end 112 can be supported by the heat conductive strip 22, so as to improve the position stability of the winding end 112, so as to ensure the synchronization between the rotor winding 11 and the main shaft 13. Finally, the reliability of the motor can be improved.

[0037] See also Figures 7 to 9 , Figure 7is a schematic structural diagram of a thermally conductive strip 22 provided in an exemplary embodiment of the present disclosure, Figure 8 is a side view of a thermally conductive strip 22 provided in an exemplary embodiment of the present disclosure, Fig. 9 yes Figure 8 Schematic diagram of the cross-sectional structure of AAA in FIG. In some embodiments, the heat conductive strip 22 has a heat dissipation channel 223. The heat dissipation channel 223 is connected end to end. A portion of the heat dissipation channel 223 is arranged in the heat dissipation section 221. The other portion is arranged in the heat absorption section 222. The heat dissipation channel 223 is used to fill the heat exchange medium.

[0038] The heat exchange medium is selected to have good heat transfer performance, corrosion resistance and anti-coking ability. For example, the heat exchange medium can be a single-phase fluid medium such as deionized water and low-temperature heat transfer oil, or a phase change medium with stable thermal performance.

[0039] It can be understood that the heat absorption section 222 is located between the winding bevels 113 and has a higher temperature. The heat dissipation section 221 is located at one end of the winding bevels 113 and does not contact the rotor winding 11, so its temperature is relatively low. Therefore, there is a temperature difference between the cold end and the hot end. In this way, a structural temperature difference is formed on the heat conducting strip 22. Driven by the structural temperature difference, the Joule heat of the winding bevels 113 is transferred to the hot end and the cold end in turn, and finally carried away by the motor ventilation system through the cold air convection on the surface of the heat dissipation section 221, so as to achieve the cooling of the winding bevels 113.

[0040] The following is an example of a large-capacity variable-speed generator motor rotor rotating, where the minimum circumferential follower linear velocity of the heat-conducting strip 22 is 80 m / s and the distance between the heat-conducting strip 22 and the main axis of rotation is not less than 2 m.

[0041] The minimum value of the acceleration of the inertial force (i.e., the centrifugal force of the rotating field) to which the heat exchange medium in the heat dissipation channel 223 is subjected is:

[0042] In the inertial force field, the natural convection heat transfer intensity of the heat transfer medium is measured by the Grashof number Gr, which is proportional to the inertial acceleration: (Formula 2); Where β is the volume expansion coefficient of the fluid (unit: K -1 ), which indicates the degree to which the volume of the fluid changes with temperature, reflects the effect of temperature change on the density of the fluid, and thus affects the intensity of natural convection.

[0043] Next, the inertial acceleration a of the large-capacity variable-speed generator motor rotor obtained by formula 1 is substituted into formula 2 to show that the natural convection intensity of the heat exchange medium in the heat transfer strip 22 is at least 10 times the natural convection intensity in the standard gravity field. 2times. Since the cold end and the hot end of the heat-conducting strip 22 have a radial position difference (the heat-dissipating section 221 is located at the end face of the support ring 21, and the heat-absorbing section 222 is located at the outer peripheral side of the support ring 21) and a temperature difference (the heat-absorbing section 222 is located between the winding bevels 113 and absorbs heat, and the heat-dissipating section 221 is located outside the winding bevels 113 and dissipates heat), and the heat-dissipating flow channels 223 are connected end to end. Therefore, the heat exchange medium will rely on thermal buoyancy to establish a spontaneous stable flow cycle, thereby greatly improving the heat transfer capacity of the heat-conducting strip 22.

[0044] Specifically, simulation analysis using fluid analysis software (for example, ANSYS CFD or ANSYS fluent) can yield the following results: when deionized water is selected as the heat exchange medium, the thermal conductivity of the heat-conducting strip 22 is close to 4000 W / m / K, which is 20 times the thermal conductivity of the heat-conducting strip 22 when aluminum material is selected as the heat exchange medium; when a phase change medium is selected as the heat exchange medium, the thermal conductivity can be increased to 6000 W / m / K, which is 30 times the thermal conductivity of the heat-conducting strip 22 when aluminum material is selected as the heat exchange medium.

[0045] In addition, in the related art, in order to meet the cooling requirements of the winding end 112, the bevel gap 116 needs to be designed to be more than 5mm to provide a sufficient air duct width for air circulation. In this embodiment, since the boundary layer thickness of the heat exchange medium is significantly smaller than that of air, the width of the heat dissipation channel 223 is 1~2mm 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 of the thermal conductive strip 22 is 2~4mm, such as Fig.10 As shown, Fig.10 1 is a comparison diagram of the gaps between the winding bevels 113 in the related art and the gaps between the winding bevels 113 of the heat sink 2 provided in the exemplary embodiment of the present disclosure. Fig.10 In the figure, (a) is a schematic diagram of the layout of the winding bevel 113 in the relevant pole, and (b) is a schematic diagram of the winding bevel 113 using the heat sink 2 provided in the embodiment of the present application. On the basis of the consistent span L3 of the winding end 112, the bevel gap 116 in the related art is larger due to the ventilation and heat dissipation requirements. Correspondingly, the length L1 of the winding bevel 113 in the related art is larger. In this embodiment, due to the setting of the heat sink 2, the bevel gap 116 is smaller. Correspondingly, the length L2 of the winding bevel 113 of the heat sink 2 provided in the embodiment of the present application is smaller.

[0046] Therefore, in this embodiment, by providing a heat dissipation channel 223 filled with a heat exchange medium in the heat conductive strip 22, the thermal conductivity of the heat conductive strip 22 can be improved to improve the heat dissipation efficiency of the heat conductive strip 22. In this way, the bevel gap 116 can be reduced, thereby achieving the purpose of reducing the length of the winding end 112.

[0047] See also Fig. 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 arranged 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 arranged at the heat dissipation section 221 and the heat absorption section 222. Among them, the ends of the two first sub-channels 224 located in the heat dissipation section 221 are connected to each other. The ends of the two second sub-channels 225 located in the heat dissipation section 221 are connected to each other. The ends of the two first sub-channels 224 located in the heat absorption section 222 are respectively connected to the ends of the two second sub-channels 225 located in the heat absorption section 222. In this way, multi-layer flow of heat exchange medium can be realized inside the heat conductive strip 22, so as to improve the heat dissipation efficiency of the heat conductive strip 22.

[0048] See also Fig. 9 In some embodiments, a threaded hole 23 is provided on the heat conducting strip 22. The threaded hole 23 is connected to the heat dissipation channel 223. The heat dissipation element 2 further includes a threaded head 24, which is threadedly connected to the threaded hole 23.

[0049] Specifically, the threaded hole 23 is provided on the heat dissipation section 221. Exemplarily, the threaded hole 23 is provided on the end surface of the heat dissipation section 221 facing the main shaft 13.

[0050] In this embodiment, by providing the threaded hole 23 and the threaded head 24, not only can the heat exchange medium be added to the heat dissipation channel 223 through the threaded hole 23, but also the leakage of the heat exchange medium can be effectively avoided, and subsequent maintenance is facilitated.

[0051] See also 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 away from the support ring 21. The end of the rod of the first screw 26 passes through the clamping ring 25 and is threadedly connected to the support ring 21. In this way, the heat sink section 221 can be fixed on the end face of the support ring 21 by the clamping ring 25, so as to improve the reliability of the connection between the support ring 21 and the heat conductive strip 22.

[0052] It can be understood that when the heat sink 2 includes the second heat conducting strip 22, the second section is located between the clamping ring 25 and the support ring 21. The second section is fixed to the end surface of the support ring 21 through the clamping ring 25.

[0053] See also 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 is in contact with the clamping ring 25 .

[0054] It can be understood that the slot 211 is a through slot structure, which extends along the radial direction of the support ring 21 .

[0055] It can be understood that the groove walls on both sides of the groove 211 limit the movement of the heat conductive strip 22 in the circumferential direction of the support ring 21, and the clamping ring 25 and the support ring 21 together limit the movement of the heat conductive strip 22 in the radial direction of the support ring 21 and the axial direction of the support ring 21.

[0056] In this embodiment, by providing the card slot 211 , the heat conducting strip 22 can be detachably provided on the support ring 21 , which can improve the assembly efficiency of the heat sink 2 and the convenience of maintenance of the heat sink 2 .

[0057] See also Figure 7 and Fig.11 , Fig.11 yes Figure 5 The cross-sectional view of BB in FIG. 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 the groove wall of one side of the first stepped groove 226. In this way, the heat conducting strip 22 is stopped and matched with the clamping ring 25, thereby limiting the movement of the heat conducting strip 22 in the radial direction of the support ring 21, so as to improve the position stability of the heat conducting strip 22.

[0058] Among them, the inner ring surface of the clamping ring 25 abuts against the side groove wall of the first stepped groove 226 to prevent the heat-conducting strip 22 from moving outward in 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 in the radial direction of the support ring 21.

[0059] See also Fig.11 In some embodiments, a boss 212 is provided on 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, and the remaining portion is spaced apart from the support ring 21. In this way, a ventilation channel can be formed between the heat dissipation section 221 and the support ring 21 to facilitate air circulation, thereby increasing the heat dissipation area of ​​the heat dissipation section 221. In this way, the heat dissipation efficiency of the heat conductive strip 22 can be improved.

[0060] See also Figure 5 or Fig.11 In some embodiments, a weight-reducing groove 213 is provided on the inner ring surface of the support ring 21. The weight-reducing groove 213 extends along the circumference of the support ring 21. In this way, the material of the support ring 21 can be reduced, so as to reduce the gravity of the support ring 21, thereby facilitating the control of the weight of the motor.

[0061] See also Figure 4 or Figure 5In some embodiments, the heat absorbing sections 222 of a portion of the heat conducting strips 22 are parallel to the upper layer bevel 114, and the heat absorbing sections 222 of the remaining portion of the heat conducting strips 22 are parallel to the lower layer bevel 115. In particular, along the circumference of the support ring 21, the heat dissipation sections 221 connected to the heat absorbing sections 222 parallel to the lower layer bevel 115 and the heat dissipation sections 221 connected to the heat absorbing sections 222 parallel to the upper layer bevel 114 are alternately distributed in sequence. The heat absorbing sections 222 parallel to the lower layer bevel 115 are located between the heat absorbing sections 222 parallel to the upper layer bevel 114.

[0062] Specifically, the heat absorption section 222 parallel to the upper layer oblique edge 114 is defined as the upper layer heat absorption part 222a, the heat absorption section 222 parallel to the lower layer oblique edge 115 is defined as the lower layer heat absorption part 222b, the heat dissipation section 221 connected to the upper layer heat absorption part 222a is defined as the upper layer heat dissipation section 221a, and the heat dissipation section 221 connected to the lower layer heat absorption part 222b is defined as the lower layer heat dissipation section 221b. The upper heat-conducting portion is arranged in sequence at intervals along the circumference of the support ring 21, the upper bevel 114 and the upper heat-conducting portion are staggered along the circumference of the support ring 21, and each upper bevel 114 is thermally coupled with the corresponding upper heat-conducting portion; the lower heat-conducting portion is arranged in sequence at intervals along the circumference of the support ring 21, the lower bevel 115 and the lower heat-conducting portion are staggered along the circumference of the support ring 21, and each lower bevel 115 is thermally coupled with the corresponding lower heat-conducting portion; the upper heat-dissipating section 221a and the lower heat-dissipating section 221b are arranged in sequence at intervals along the circumference of the support ring 21, such as Figure 6 shown.

[0063] In this embodiment, through the above arrangement, the upper bevel 114 and the lower bevel 115 can be isolated from the air medium by the upper heat absorbing portion 222a and the lower heat absorbing portion 222b respectively, so as to improve the heat dissipation efficiency of the rotor winding 11.

[0064] See also Fig.12 , Fig.12 It is a partial structural schematic diagram of a rotor assembly 1 provided in an exemplary embodiment of the present disclosure. In the second aspect, an embodiment of the present application provides a rotor assembly 1. The rotor assembly 1 includes a main shaft 13, a rotor bracket 14, a rotor core 12, a rotor winding 11 and the aforementioned heat sink 2. The rotor bracket 14 is sleeved on the main shaft 13. The rotor core 12 is sleeved on the rotor bracket 14. A winding groove 121 is provided on the side of the rotor core 12 facing away from the main shaft 13. The rotor winding 11 includes a winding straight edge 111 and a winding bevel group connected to each other. The winding straight edge 111 is arranged in the winding groove 121. The winding bevel group is located at one end of the rotor core 12. The support ring 21 is sleeved on the main shaft 13 and is located at one end of the rotor core 12. The winding bevel group is thermally coupled with the heat absorption section 222.

[0065] It can be understood that the rotor assembly 1 includes the above-mentioned heat sink 2. The rotor assembly 1 has all the beneficial effects of the above-mentioned heat sink 2, which will not be described in detail in this disclosure.

[0066] Specifically, the heat conducting strip 22 is bonded to the winding end 112, that is, each upper layer bevel 114 is bonded to the corresponding upper layer heat conducting part, and each lower layer bevel 115 is bonded to the corresponding lower layer heat conducting part. In addition, one side of each upper layer bevel 114 is bonded to the corresponding upper layer heat conducting part, and the other side is abutted to another upper layer heat conducting part adjacent to it through a conformable material. At the same time, potting glue can be used to fill the gap to eliminate the bonding surface gap between the heat conducting strip 22 and the winding bevel 113. And the rotor core 12, the rotor winding 11 and the heat sink 2 are solidified into one.

[0067] The rotor assembly 1 further includes a guard ring 15. The guard ring 15 is wound around the winding bevel 113. The winding bevel 113 is located between the guard ring 15 and the support ring 21. In this way, the winding bevel 113 is supported and limited by the guard ring 15 and the support ring 21 to prevent it from deviating from the preset position due to the centrifugal force.

[0068] In a third aspect, an embodiment of the present application provides a motor, which includes the aforementioned rotor assembly 1.

[0069] It can be understood that the motor also includes a housing and a stator assembly. The rotor assembly 1 is arranged in the housing, and the main shaft 13 is rotatably matched with the housing through a bearing. The stator assembly is fixed in the housing and sleeved outside the rotor assembly 1. There is a matching air gap between the stator assembly and the rotor assembly 1.

[0070] It can be understood that the motor includes the above-mentioned rotor assembly 1. The motor has all the beneficial effects of the above-mentioned rotor assembly 1, which will not be described in detail in this disclosure.

[0071] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0072] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0073] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0074] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A heat sink (2), characterized in that: include: Support ring (21); as well as, A heat-conducting strip (22), comprising a heat-dissipating section (221) and a heat-absorbing section (222) connected to each other, wherein the heat-dissipating section (221) is connected to an end surface of the support ring (21), and the heat-absorbing section (222) is located on the outer peripheral side of the support ring (21); There are a plurality of heat-conducting strips (22), and the plurality of heat-conducting strips (22) are sequentially arranged along the circumference of the support ring (21); The heat absorbing section (222) is parallel to the upper oblique edge (114) of the rotor winding (11), or the heat absorbing section (222) is parallel to the lower oblique edge (115) of the rotor winding (11), or the heat absorbing section (222) of a portion of the heat conducting strip (22) is parallel to the upper oblique edge (114), and the heat absorbing section (222) of the remaining portion of the heat conducting strip (22) is parallel to the lower oblique edge (115).

2. The heat sink (2) according to claim 1, characterized in that: The heat-conducting strip (22) has a heat dissipation channel (223), a portion of the heat dissipation channel (223) is arranged in the heat dissipation section (221), and another portion is arranged in the heat absorption section (222); Wherein, the heat dissipation channel (223) is used to be filled with heat exchange medium.

3. The heat sink (2) according to claim 2, characterized in that: The heat dissipation channel (223) comprises two first sub-channels (224) and two second sub-channels (225); the two ends of the two first sub-channels (224) are respectively arranged 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); and the two ends of the two second sub-channels (225) are respectively arranged at the heat dissipation section (221) and the heat absorption section (222); wherein the ends of the two first sub-channels (224) located at the heat dissipation section (221) are interconnected, the ends of the two second sub-channels (225) located at the heat dissipation section (221) are interconnected, and the ends of the two first sub-channels (224) located at the heat absorption section (222) are respectively connected to the ends of the two second sub-channels (225) located at the heat absorption section (222); And / or, the heat conducting strip (22) is provided with a threaded hole (23), the threaded hole (23) is connected to the heat dissipation channel (223), and the heat dissipation element (2) further comprises a threaded head (24), and the threaded head (24) is threadedly connected to the threaded hole (23).

4. The heat sink (2) according to claim 1, characterized in that: The heat sink (2) further comprises 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 a side of the heat sink section (221) away from the support ring (21); and the end of the rod of the first screw (26) passes through the clamping ring (25) and is threadedly connected to the support ring (21).

5. The heat sink (2) according to claim 4, characterized in that: 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).

6. The heat sink (2) according to claim 4, 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 a groove wall on one side of the first stepped groove (226).

7. The heat sink (2) according to any one of claims 1 to 6, characterized in that: A boss (212) is protrudingly provided on 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), 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), and the weight-reducing groove (213) extends along the circumference of the support ring (21).

8. The heat sink (2) according to any one of claims 1 to 6, characterized in that: The heat absorbing section (222) of a portion of the heat conducting strips (22) is parallel to the upper layer oblique edge (114), and the heat absorbing section (222) of the remaining portion of the heat conducting strips (22) is parallel to the lower layer oblique edge (115); Wherein, along the circumference of the support ring (21), the heat dissipation section (221) connected to the heat absorption section (222) parallel to the lower layer oblique edge (115) and the heat dissipation section (221) connected to the heat absorption section (222) parallel to the upper layer oblique edge (114) are alternately distributed in sequence, and the heat absorption section (222) parallel to the lower layer oblique edge (115) is located between the heat absorption sections (222) parallel to the upper layer oblique edge (114).

9. A rotor assembly (1), characterized in that: include Spindle (13); A rotor support (14) sleeved on the main shaft (13); A rotor core (12) is sleeved on the rotor support (14), and a winding groove (121) is provided on a side of the rotor core (12) facing away from the main shaft (13); A rotor winding (11), comprising a winding straight edge (111) and a winding bevel edge group connected to each other, the winding straight edge (111) being arranged in the winding slot (121), and the winding bevel edge group being located at one end of the rotor core (12); and The heat sink (2) according to any one of claims 1 to 8, wherein the support ring (21) is sleeved on the main shaft (13) and is located at one end of the rotor core (12), and the winding bevel group is thermally coupled with the heat absorption section (222).

10. A motor, characterized in that: Comprising a rotor assembly (1) as claimed in claim 9.

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