Magnet, rotor iron core, rotor, manufacturing method for rotor, motor, and wind turbine

Abstract

Provided in the present disclosure are a magnet, a rotor iron core, a rotor, a manufacturing method for the rotor, a motor, and a wind turbine. The rotor iron core comprises an iron core body and press plates, a plurality of magnetic pole mounting positions being arranged at intervals along the circumferential direction of the iron core body, each magnetic pole mounting position being provided with a magnet mounting groove used for accommodating a magnet, the magnet mounting grooves penetrating through the iron core body along the axial direction of the rotor iron core, the press plates being provided at axial end portions of the iron core body, the press plates being provided with press plate grooves, and the press plate grooves being arranged in alignment with the magnet mounting grooves.

Description

Magnet, rotor core, rotor, manufacturing method of rotor, motor and wind turbine generator system TECHNICAL FIELD

[0001] The present disclosure relates to the field of wind power technology, in particular to a magnet, a rotor core, a rotor, a manufacturing method of the rotor, a motor and a wind turbine generator system. BACKGROUND

[0002] The rotor of a permanent magnet motor generally comprises a rotating shaft, a rotor core, permanent magnets connected to the rotor core, and end plates arranged at both ends of the rotor core. The rotor core is generally formed by stacking a plurality of rotor laminations. The end plates are arranged at both ends of the rotor core to prevent tooth expansion of the rotor core.

[0003] At present, the rotor core with the permanent magnets and the end plates is generally connected to the rotating shaft through a hot fitting process. However, the permanent magnets are prone to high-temperature demagnetization during the hot fitting process, which affects the normal use of the motor.

[0004] In addition, the generator generates heat during operation. In order to ensure that the generator is not affected by heat and operates normally, the generator needs to be cooled and heat-dissipated.

[0005] With the increase of the rotating speed of the generator, the power of the generator increases or the heat-dissipation area of the rotor decreases, which leads to over-temperature of the magnetic steel and loss of performance, thereby affecting the reliability of the generator. SUMMARY

[0006] An object of the present disclosure is to provide a magnet, a rotor core, a rotor, a manufacturing method of the rotor, a motor and a wind turbine generator system, which can solve at least one of the above technical problems.

[0007] According to an aspect of the present disclosure, a rotor core is provided, which comprises a core body and a pressing plate. The core body is provided with a plurality of magnetic pole mounting positions at intervals in the circumferential direction thereof. Each magnetic pole mounting position is provided with a magnet mounting groove for accommodating a magnet. The magnet mounting groove penetrates through the core body in the axial direction of the rotor core. The pressing plate is arranged at an axial end of the core body. The pressing plate is provided with a pressing plate groove, which is arranged in position with the magnet mounting groove.

[0008] According to another aspect of the present disclosure, a rotor is provided, which comprises a rotating shaft and a rotor core as described above. The rotating shaft and the rotor core are assembled together through a hot fitting process.

[0009] According to another aspect of the present disclosure, there is provided a manufacturing method of a rotor, comprising: assembling a rotor core as described above; connecting a shaft and the rotor core together through a shrink fit process; and loading a plurality of magnets into the first and second installation slots through the first and second pressing plate slots, respectively.

[0010] According to another aspect of the present disclosure, there is provided a magnet for installation in a rotor core, comprising a magnet body and installation portions provided on the magnet body, the installation portions being provided at both ends of the magnet body in a circumferential direction of the rotor core, and the installation portions being recessed relative to the magnet body on two sides opposite in an axial direction of the rotor core, and / or the installation portions being recessed relative to the magnet body on two sides opposite in a radial direction of the rotor core.

[0011] According to another aspect of the present disclosure, there is provided a magnetic pole module for installation in a rotor core of an electric machine, comprising a positioning member and a magnetic steel group, the positioning member extending a predetermined length in an axial direction of the rotor core, and the magnetic steel group comprising at least two magnets distributed along the axial direction of the rotor core and connected to the positioning member, respectively, so that the at least two magnets can be inserted into the rotor core as a whole.

[0012] According to another aspect of the present disclosure, there is provided a rotor comprising a rotor core and a magnetic pole module as described above, the rotor core being provided with a magnet installation slot matched with the magnetic pole module, the magnet installation slot extending in an axial direction of the rotor core, and the magnetic pole module being arranged in the magnet installation slot.

[0013] According to another aspect of the present disclosure, there is provided a manufacturing method of a rotor, comprising:

[0014] providing a shaft and a rotor core provided with a magnet installation slot extending in an axial direction of the rotor core;

[0015] heating the rotor core to a preset temperature, and fitting the rotor core heated to the preset temperature onto the shaft and cooling to connect the rotor core and the shaft;

[0016] providing a magnetic pole module comprising a positioning member and at least two magnets distributed along an extension direction of the positioning member and connected to the positioning member, respectively;

[0017] inserting the magnetic pole module into the magnet installation slot.

[0018] According to another aspect of the present disclosure, a rotor is provided, comprising a rotor shaft, a plurality of rotor segments sleeved on the rotor shaft along an axial direction of the rotor shaft, each of the rotor segments comprising a core segment and a magnet fixed to the core segment, and a spacer disposed between adjacent rotor segments to space the adjacent rotor segments apart from each other along the axial direction to form a radial air channel.

[0019] According to another aspect of the present disclosure, a manufacturing method of a rotor is provided, comprising:

[0020] sleeving a plurality of rotor segments on a rotor shaft along an axial direction of the rotor shaft, each of the rotor segments comprising a core segment and a magnet fixed to the core segment, and disposing a spacer between adjacent rotor segments to space the adjacent rotor segments apart from each other along the axial direction to form a radial air channel.

[0021] According to another aspect of the present disclosure, a manufacturing method of a rotor is provided, comprising:

[0022] According to another aspect of the present disclosure, an electric machine is provided, comprising a rotor core as described above, or comprising a pole module as described above, or comprising a rotor as described above.

[0023] According to another aspect of the present disclosure, a wind turbine generator is provided, comprising an electric machine as described above, the electric machine being a generator. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0025] Fig. 1 is a structural view of a rotor core according to an example embodiment of the present disclosure.

[0026] Fig. 2 is a structural view of a rotor lamination in Fig. 1.

[0027] Fig. 3 is a structural view of a first pressing plate in Fig. 1.

[0028] Fig. 4 is a structural view of a second pressing plate in Fig. 1.

[0029] Fig. 5 is an exploded view of the first pressing plate, a magnet pressing plate and a magnet in Fig. 1.

[0030] Fig. 6 is an exploded view of the second pressing plate, the magnet pressing plate and the magnet in Fig. 1.

[0031] Fig. 7 is a structural view of a rotor structure according to an example embodiment of the present disclosure.

[0032] Fig. 8 is a structural view of a wind turbine generator according to an example embodiment of the present disclosure.

[0033] Fig. 9 is a structural view of a generator according to an example embodiment of the present disclosure.

[0034] Fig. 10 is a structural diagram of a rotor according to an embodiment of the present disclosure.

[0035] Fig. 11 is an enlarged view of a portion of Fig. 10 at A.

[0036] Fig. 12 is a side view of a rotor according to an embodiment of the present disclosure.

[0037] Fig. 13 is an enlarged view of a portion of Fig. 12 at B.

[0038] Fig. 14 is a longitudinal sectional view of a rotor according to an embodiment of the present disclosure.

[0039] Fig. 15 is an enlarged view of a portion of Fig. 7 at D.

[0040] Fig. 16 is a structural diagram of a magnetic pole module according to an embodiment of the present disclosure.

[0041] Fig. 17 is an exploded diagram of a magnetic pole module according to an embodiment of the present disclosure.

[0042] Fig. 18 is a partial sectional view of a magnetic pole module according to an embodiment of the present disclosure.

[0043] Fig. 19 is an enlarged view of a portion of Fig. 18 at F.

[0044] Fig. 20 is an enlarged view of a portion of Fig. 15 at E.

[0045] Fig. 21 is an enlarged view of a portion of Fig. 13 at C.

[0046] Fig. 22 is a structural diagram of a hem portion according to an embodiment of the present disclosure.

[0047] Fig. 23 is a structural diagram of a hem portion according to another embodiment of the present disclosure.

[0048] Fig. 24 is a flow diagram of a manufacturing method of a rotor according to an embodiment of the present disclosure.

[0049] Fig. 25 is a diagram of a generator rotor according to an embodiment of the present disclosure.

[0050] Fig. 26 is a diagram of the generator rotor of Fig. 25 with the shaft omitted.

[0051] Fig. 27 is a diagram of a portion of an axial sectional view of the generator rotor of Fig. 26 according to a first embodiment of the present disclosure.

[0052] Fig. 28 is a diagram of a partition according to an embodiment of the present disclosure.

[0053] Figs. 29 to 34 are diagrams of a manufacturing method of a generator rotor according to a first embodiment of the present disclosure.

[0054] FIG. 35 is a schematic view of a portion of an axial cross-sectional view of the generator rotor of FIG. 26, according to a second embodiment of the present disclosure.

[0055] FIG. 36 is a schematic view of one manufacturing method of a generator rotor, according to a second embodiment of the present disclosure.

[0056] FIG. 37 is an enlarged view of portion I of FIG. 36.

[0057] FIG. 38 is a schematic view of another manufacturing method of a generator rotor, according to a second embodiment of the present disclosure. DETAILED DESCRIPTION

[0058] The following detailed description is presented to aid in understanding the method, apparatus and / or system described herein. It is not intended to limit the method, apparatus and / or system described herein to the exact construction details described. Various changes, modifications and equivalents can be resorted to without departing from the disclosure disclosed and described herein. For example, the order in which operations are described is not necessarily the order in which operations are performed. Also, the various examples described herein are meant to be examples and not meant to be limiting.

[0059] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, these examples are provided as example so as to demonstrate a few possible ways of implementing the method, apparatus and / or system described herein, which will be obvious to those skilled in the art in light of the disclosure.

[0060] As used herein, the term "and / or" includes any one of the associated listed items, as well as any combination of any two or more of the associated listed items.

[0061] Although terms such as "first", "second" and "third" can be used herein to describe various components, assemblies, regions, layers or sections, these components, assemblies, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one component, assembly, region, layer or section from another component, assembly, region, layer or section. Thus, a component, assembly, region, layer or section referred to as a first component, a first assembly, a first region, a first layer or a first section in the examples described herein can also be referred to as a second component, a second assembly, a second region, a second layer or a second section without departing from the teachings of the examples.

[0062] In the description, when an element such as a layer, a region, or a substrate is referred to as being "on" another element, "connected to" or "coupled to" another element, it can be directly on the other element or directly connected to or coupled to the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on" another element, "directly connected to" or "directly coupled to" another element, there are no other elements interposed therebetween.

[0063] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and "comprising," and the like, mean that the described features, numbers, operations, members, elements and / or combinations thereof are present, but do not necessarily preclude the presence or addition of one or more other features, numbers, operations, members, elements and / or combinations thereof.

[0064] In the present disclosure, the orientation of the terms is defined based on the orientation of the product in the normal use state, unless otherwise specified in the drawings.

[0065] Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs when read in light of the present disclosure. Unless explicitly defined otherwise herein, terms such as, for example, "a", "an" and "the" are to be construed as meaning "one or more" when used in this specification. As used herein, the term "another" is defined as meaning at least one or more, unless the context clearly indicates otherwise.

[0066] As described in the background section, the existing generator rotor has a problem in that it is difficult to design a radial ventilation passage and the assembly efficiency is low. The present disclosure provides a generator rotor capable of easily forming a radial ventilation passage and a manufacturing method of a generator rotor capable of improving the assembly efficiency. Hereinafter, a generator rotor according to an embodiment of the present disclosure, a manufacturing method thereof, a generator, and a wind power generator system will be described in detail with reference to the accompanying drawings.

[0067] Example embodiments will now be described more fully with reference to the accompanying drawings. Implementations of the disclosure, however, can be embodied in many different forms and should not be construed as limited to the implementations set forth herein. Like reference numerals refer to like elements throughout the drawings, and thus a detailed description of them will not be repeated.

[0068] At present, the rotor core 200 is usually connected with the magnet 320 first, and then the end plate is arranged at both ends of the rotor core 200, and the magnet 320 is axially limited by the end plate to avoid the tooth expansion phenomenon of the rotor core 200.

[0069] However, when assembling the rotor, the rotor core 200 usually needs to be heated at high temperature and then sleeved on the rotating shaft 110, that is, the rotating shaft 110 is inserted into the rotating shaft mounting hole 27 of the rotor core 200, for example, but not limited to, by using the principle of thermal expansion and cold contraction, the rotor core 200 can be firmly connected to the rotating shaft 110. In the process of hot fitting of the rotating shaft 110 and the rotor core 200, the rotor core 200 is heated together with the magnets 320, which is easy to cause high-temperature demagnetization of the permanent magnets, affecting the performance of the motor.

[0070] In one aspect of the present disclosure, a rotor core is provided, the rotor core 200 includes a core body and a pressing plate, the core body is provided with a plurality of magnetic pole mounting positions at intervals in the circumferential direction thereof, each magnetic pole mounting position is provided with a magnet mounting groove for accommodating a magnet 320, the magnet mounting groove penetrates the core body in the axial direction of the rotor core 200, and the pressing plate is arranged at the axial end of the core body for axially limiting the magnet 320 to prevent the tooth expansion phenomenon of the rotor core 200. In order to enable the magnet 320 to be inserted into the magnet mounting groove, the pressing plate is provided with a pressing plate groove, and the pressing plate groove is arranged in position with the magnet mounting groove, and the magnet 320 can be inserted into the magnet mounting groove through the pressing plate groove.

[0071] In the present embodiment, the pressing plate can be arranged at each axial end of the core body, and at least one of the two pressing plates is provided with a pressing plate groove arranged in position with the magnet mounting groove, which can meet the installation requirements of the magnet 320.

[0072] Referring to FIG. 1, in one aspect of the present disclosure, a rotor core 200 is provided, the rotor core 200 includes a core body and a first pressing plate 21 and a second pressing plate 22 arranged at the axial ends of the core body respectively, the core body is provided with a plurality of groups of magnetic pole mounting positions at intervals in the circumferential direction thereof, each group of magnetic pole mounting positions is provided with at least two magnet mounting grooves for accommodating a magnet 320, the magnet mounting grooves include first mounting grooves 232 and second mounting grooves 233 arranged at intervals and alternately in the circumferential direction of the core body, the first mounting grooves 232 and the second mounting grooves 233 penetrate the core body in the axial direction of the rotor core 200 respectively, the first pressing plate 21 is provided with a first pressing plate groove 211, the first pressing plate groove 211 is arranged in position with the first mounting grooves 232, and the magnet 320 can be inserted into the first mounting grooves 232 through the first pressing plate groove 211, the second pressing plate 22 is provided with a second pressing plate groove 221, the second pressing plate groove 221 is arranged in position with the second mounting grooves 233, and the magnet 320 can be inserted into the second mounting grooves 233 through the second pressing plate groove 221.

[0073] The first pressing plate slot 211 is arranged on the first pressing plate 21 in alignment with the first mounting slot 232, so that the magnet 320 can be inserted into the first mounting slot 232 through the first pressing plate slot 211; the second pressing plate slot 221 is arranged on the second pressing plate 22 in alignment with the second mounting slot 233, so that the magnet 320 can be inserted into the second mounting slot 233 through the second pressing plate slot 221, which makes it possible to install the magnet 320 on the rotor core 200 after the shaft 110 and the rotor core 200 are connected together through the shrink fit process, so that the rotor core 200 does not carry the magnet 320 during the shrink fit process with the shaft 110, and the rotor core 200 does not carry the magnet 320, which avoids demagnetization of the magnet 320 due to high temperature, and improves the use reliability of the rotor.

[0074] In the embodiment, the core body can be composed of a plurality of rotor laminations 23 stacked in the axial direction of the rotor core 200, and after the stacking of the rotor laminations 23 is completed, axial tooth expansion is easily generated, so the first pressing plate 21 and the second pressing plate 22 are arranged at the axial ends of the core body, so as to avoid the tooth expansion of the core body and improve the use reliability of the rotor core 200.

[0075] The rotor core 200 provided by the present disclosure is particularly suitable for high-speed motors, but is not limited thereto.

[0076] In order to further improve the reliability of the rotor core 200, in the embodiment, the rotor core 200 further comprises an axial tension rod 140, the rotor lamination 23 is provided with a core tension rod mounting hole 236, the first pressing plate 21 and the second pressing plate 22 are respectively provided with a pressing plate tension rod mounting hole, the pressing plate tension rod mounting hole is arranged in alignment with the core tension rod mounting hole 236, the axial tension rod 140 extends in the axial direction of the rotor core 200, and the axial tension rod 140 is arranged in the core tension rod mounting hole 236 and the pressing plate tension rod mounting hole to axially tension the rotor core 200, which further avoids the tooth expansion of the core body and improves the use reliability of the rotor core 200.

[0077] In the embodiment, the first mounting slot 232 and the second mounting slot 233 respectively penetrate each rotor lamination 23, but are not limited thereto.

[0078] Referring to FIG. 2, in the embodiment, the rotor lamination 23 is provided with a plurality of magnetic pole mounting positions along the circumferential direction thereof, and each magnetic pole mounting position is provided with three magnet mounting slots, among which the middle one is defined as a first mounting slot 232, and the ones on both sides of the first mounting slot 232 are defined as second mounting slots 233. A magnetic separation bridge 234 is arranged between the first mounting slot 232 and the second mounting slot 233, which can avoid the excessive leakage magnetic coefficient of the magnet 320, thereby improving the utilization rate of the magnet 320. In addition, the magnetic separation bridge 234 also has a bearing structure, which bears the centrifugal force of the magnet 320 during high-speed rotation of the rotor, but is not limited thereto.

[0079] Optionally, the plurality of magnetic pole mounting positions are arranged at intervals along the circumferential direction of the rotor lamination 23. Specifically, a magnetic separation bridge 234 is arranged on each side of the magnetic pole mounting position along the circumferential direction of the rotor core 200, further improving the utilization rate of the magnet 320.

[0080] In the embodiment, three magnet mounting slots are arranged at each magnetic pole mounting position, and four magnetic separation bridges 234 are taken as an example for illustration, but are not limited thereto. The number of magnets 320 contained in each magnet mounting slot can be selected according to actual needs.

[0081] Each rotor lamination 23 is also provided with a lamination shaft hole 237 for the rotating shaft 110 to pass through and a plurality of lamination weight reduction holes 235. The plurality of lamination weight reduction holes 235 are arranged at intervals along the circumferential direction outside the lamination shaft hole 237. On the one hand, the lamination weight reduction holes 235 reduce the weight of the rotor lamination 23, thereby making the rotor core 200 lighter in weight. On the other hand, the lamination weight reduction holes 235 of adjacent rotor laminations 23 are arranged in position, so that an axial air duct 260 of the rotor core 200 is formed in the rotor core 200 through the lamination weight reduction holes 235, for heat dissipation of the rotor core 200, thereby improving the use reliability of the rotor core 200.

[0082] Optionally, along the radial direction of the rotor lamination 23, the plurality of lamination weight reduction holes 235 are arranged inside the plurality of magnetic pole mounting positions, but are not limited thereto.

[0083] In the embodiment, the lamination weight reduction hole 235 is in the shape of a sector, but is not limited thereto. The lamination weight reduction hole 235 can be circular, elliptical, rectangular, etc. according to needs.

[0084] Further, the rotor lamination 23 is also provided with a plurality of core pull rod mounting holes 236 for the axial pull rod 140 to pass through, and the plurality of core pull rod mounting holes 236 are arranged at intervals along the circumferential direction of the rotor lamination 23. Optionally, along the radial direction of the rotor lamination 23, the core pull rod mounting hole 236 is located between the lamination weight reduction hole 235 and the magnetic pole mounting position, but is not limited thereto.

[0085] Optionally, the rotor lamination 23 is a silicon steel sheet, for example but not limited to, the rotor lamination 23 can be a high-strength silicon steel sheet.

[0086] Specifically, the plurality of rotor laminations 23 are laminated to form core segments, and the plurality of core segments are arranged along the axial direction of the rotor core 200 to form core bodies, each core body comprising at least two core segments arranged at intervals along the axial direction of the rotor core 200, but not limited thereto.

[0087] With reference to FIG. 2, in order to facilitate ventilation of the rotor core 200, the rotor core 200 further comprises a separation strip 150, which is arranged at intervals of a certain number of laminations in the axial direction of the rotor core 200, in other words, the separation strip 150 of the rotor core 200 is arranged between two adjacent core segments, and the separation strip 150 extends along the radial direction of the rotor core 200 and forms a radial ventilation channel 28 between the two adjacent core segments. In the present embodiment, in order to further improve the heat dissipation efficiency, the radial ventilation channel 28 of the rotor core 200 is in communication with the axial air channel 260 formed by the lamination weight-reducing hole 235, but not limited thereto.

[0088] In the present embodiment, the separation strip 150 extends substantially along the radial direction of the rotor core 200, and the length of the separation strip 150 is selected as required, as long as it does not extend into the lamination weight-reducing hole 235 and does not extend into the magnet mounting groove.

[0089] In the present embodiment, the rotor lamination 23 in FIG. 2 can be a rotor lamination 23 located at the axial end of the core segment, but not limited thereto.

[0090] Referring to FIG. 3, the first pressing plate 21 is provided with a plurality of first pressing plate grooves 211, which are arranged at intervals along the circumferential direction of the first pressing plate 21. In the present embodiment, the first pressing plate groove 211 is formed as a circumferentially closed through hole, which extends through both axial sides of the first pressing plate 21 to facilitate insertion of the magnet 320 into the first mounting groove 232 through the first pressing plate groove 211. According to the needs, the first pressing plate groove 211 in the present embodiment is rectangular, but not limited thereto, and the shape of the first pressing plate groove 211 can be selected according to the shape of the magnet 320.

[0091] Further, the first pressing plate 21 is further provided with a first pressing plate weight-reducing hole 212, which on the one hand can reduce the weight of the first pressing plate 21, and on the other hand can be used to communicate with the axial air channel 260 formed by the lamination weight-reducing hole 235, so as to facilitate heat dissipation of the rotor core 200, thereby improving the use reliability of the rotor core 200. In the present embodiment, the first pressing plate weight-reducing hole 212 is substantially fan-shaped, and a plurality of first pressing plate weight-reducing holes 212 are arranged at intervals along the circumferential direction of the rotor core 200.

[0092] A first pressing plate rotating shaft hole 214 is arranged at the center of the first pressing plate 21 and is arranged on the inner ring side of the plurality of first pressing plate lightening holes 212, but is not limited thereto.

[0093] In this embodiment, the first circumferential direction of the first pressing plate slot 211 is arranged on the outer ring side of the second circumferential direction of the first pressing plate lightening hole 212, and a first pressing plate pull rod mounting hole 213 is further arranged on the first pressing plate 21, and the third circumferential direction of the first pressing plate pull rod mounting hole 213 is between the first circumferential direction and the second circumferential direction, but is not limited thereto.

[0094] Referring to FIG. 4, in this embodiment, a second pressing plate rotating shaft hole 225 is arranged at the center of the second pressing plate 22 and matches the rotating shaft 110, and the second pressing plate rotating shaft hole 225 is arranged in alignment with the punching plate rotating shaft hole 237 and the first pressing plate rotating shaft hole 214 to pass through the rotating shaft 110.

[0095] The second pressing plate 22 is provided with a second pressing plate lightening hole 222 arranged in alignment with the punching plate lightening hole 235, which is used for ventilation and heat dissipation of the rotor core 200, thereby improving the operation reliability of the rotor core 200.

[0096] Further, the second pressing plate 22 is provided with a second pressing plate pull rod mounting hole 223, and the second pressing plate pull rod mounting hole 223 and the first pressing plate pull rod mounting hole 213 of the first pressing plate 21 are arranged in alignment in the axial direction of the rotor core 200, so that the two ends of the axial pull rod 140 can pass through the first pressing plate pull rod mounting hole 213 and the second pressing plate pull rod mounting hole 223, respectively.

[0097] The second pressing plate 22 is further provided with a second pressing plate slot 221, and the second pressing plate slot 221 is arranged in alignment with the second mounting slot 233, so that the magnet 320 can be pushed into the second mounting slot 233 through the second pressing plate slot 221. Unlike the first pressing plate slot 211, the second pressing plate slot 221 is arranged with a notch 224 on the radial outer side of the second pressing plate 22, through which the position of the axial end of the magnet 320 can be observed, facilitating the installation of the magnet 320 in place.

[0098] Returning to FIG. 2, the first mounting slot 232 separates the two second mounting slots 233, so that the distance between the two second pressing plate slots 221 on the second pressing plate 22 is greater than the width of the first mounting slot 232 in the circumferential direction of the rotor punching plate 23, thereby ensuring the structural strength of the second pressing plate 22.

[0099] In the embodiment, the length of the notch 224 along the circumference of the second pressing plate 22 is less than the length of the second pressing plate slot 221 along the circumference of the second pressing plate 22, so that the portions of the notch 224 on both sides of the circumference of the second pressing plate 22 can bind and provide support force to the magnet 320.

[0100] For example, in the embodiment, only the first pressing plate slot 211 is provided as a circumferentially closed through hole, and the second pressing plate slot 221 is provided with a notch 224 on the outside of the second pressing plate slot 221, but not limited thereto. According to the needs, the first pressing plate slot 211 and the second pressing plate slot 221 are both provided as circumferentially closed through holes, or the first pressing plate slot 211 and the second pressing plate slot 221 are both provided with notches 224 on the outside thereof, or the first pressing plate slot 211 is provided with a notch 224 on the outside thereof, and the second pressing plate slot 221 is provided as a circumferentially closed through hole.

[0101] The first pressing plate 21 is closed at the position aligned with the second mounting slot 233, and the second pressing plate 22 is closed at the position aligned with the first mounting slot 232.

[0102] In the embodiment, the first pressing plate 21 and the second pressing plate 22 are both stainless steel plates to reduce iron loss, but not limited thereto.

[0103] The rotor core 200 further comprises a magnet pressing plate 3 provided on the outside of the first pressing plate 21 (or the second pressing plate 22) and covering the first pressing plate slot 211 (or the second pressing plate slot 221) to prevent the magnet 320 from being separated from the rotor core 200 through the first pressing plate slot 211 (or the second pressing plate slot 221) during rotation of the rotor core 200, thereby improving the operation reliability of the rotor core 200.

[0104] Referring to FIG. 5, the specific structure of the magnet pressing plate 3 on the outside of the first pressing plate 21 and the connection relationship between the first pressing plate 21 and the magnet pressing plate 3. The first pressing plate 21 is provided with a first pressing plate slot 211 aligned with the first mounting slot 232 in each group of magnetic pole mounting positions. The arrow direction in the figure shows the pushing direction of the magnet 320. After the magnet 320 is loaded into the first mounting slot 232 through the first pressing plate slot 211, the magnet pressing block 31 can be loaded and the magnet pressing plate body 32 is arranged on the outside of the first pressing plate 21, and the magnet pressing plate body 32 is tightly attached to the first pressing plate 21 to extrude the magnet pressing block 31 to push the magnet 320 inward until the magnet 320 is mounted in place.

[0105] With reference to FIG. 6, the specific structure of the magnet pressing plate 3 and the connection relationship between the magnet pressing plate 3 and the second pressing plate 22 are described by taking the explosion view of the magnet pressing plate 3 outside the second pressing plate 22 as an example. The magnet pressing plate 3 comprises a magnet pressing plate body 32 and a magnet pressing block 31. The magnet pressing plate body 32 is connected to the outside of the second pressing plate 22, and the magnet pressing block 31 extends from the magnet pressing plate body 32 to the magnet 320 and abuts against the magnet 320, so that the two ends of the magnet 320 abut against the magnet pressing block 31 and the first pressing plate 21 respectively, thereby avoiding axial movement of the magnet 320 and improving the operation reliability of the rotor core 200.

[0106] In the embodiment, the magnet pressing plate body 32 and the magnet pressing block 31 are connected by fasteners, but are not limited thereto. The magnet pressing plate body 32 and the magnet pressing block 31 can be integrally formed. Further, the magnet pressing plate body 32 is detachably connected to the outside of the second pressing plate 22 by fasteners, so as to facilitate disassembly.

[0107] In the embodiment, a plurality of magnets 320 can be arranged in each magnet mounting groove. The plurality of magnets 320 can be arranged in the magnet mounting groove one by one and by multiple insertion. In order to improve the installation efficiency of the magnets 320, the plurality of magnets 320 can be stacked in a module structure along the axial direction of the rotor core 200 in advance. The module formed by the plurality of magnets 320 is inserted into the magnet mounting groove.

[0108] With reference to FIG. 7, in another aspect of the disclosure, a rotor is provided, which comprises a rotating shaft 110 and a rotor core 200. The rotating shaft 110 and the rotor core 200 are assembled together by a hot fitting process. Since the first pressing plate 21 of the rotor core 200 provided by the disclosure is provided with a first pressing plate groove 211, and the second pressing plate 22 is provided with a second pressing plate groove 221, the magnet 320 can be installed after the assembly of the rotor core 200 is completed, i.e., the rotor core 200 in the disclosure does not carry the magnet 320. During the hot fitting process of the rotor core 200 and the rotating shaft 110, the magnet 320 will not be heated, so that the high-temperature demagnetization of the magnet 320 is avoided, and the use reliability of the rotor is improved.

[0109] Further, the rotor further comprises a plurality of magnets 320. Part of the plurality of magnets 320 is arranged in the first mounting groove 232 through the first pressing plate groove 211, and the other part is arranged in the second mounting groove 233 through the second pressing plate groove 221. In this way, after the rotor core 200 and the rotating shaft 110 are assembled together by the hot fitting process, the magnet 320 is pushed into the first mounting groove 232 through the first pressing plate groove 211 and into the second mounting groove 233 through the second pressing plate groove 221, until each magnet mounting groove is provided with the magnet 320, and then the magnet pressing plate 3 is arranged outside the first pressing plate 21 and the magnet pressing plate 3 is arranged outside the second pressing plate 22.

[0110] In another aspect of the present disclosure, a motor is provided, which comprises a stator and the above-mentioned rotor, the stator being sleeved outside the rotor, and the rotor being capable of rotating around the rotation shaft 110 relative to the stator.

[0111] In another aspect of the present disclosure, a wind turbine generator is provided, which comprises the above-mentioned motor.

[0112] In another aspect of the present disclosure, a manufacturing method of a rotor is provided, which comprises:

[0113] Assembling the above-mentioned rotor core 200;

[0114] Connecting the rotation shaft 110 and the rotor core 200 together through a hot sleeve process;

[0115] Assembling the plurality of magnets 320 into the first installation slot 232 and the second installation slot 233 through the first pressing plate slot 211 and the second pressing plate slot 221 respectively.

[0116] The rotor provided by the present disclosure comprises the rotation shaft 110 and the rotor core 200, and since the two ends of the rotor core 200 respectively comprise the first pressing plate 21 and the second pressing plate 22, the first pressing plate 21 is provided with the first pressing plate slot 211, and the second pressing plate 22 is provided with the second pressing plate slot 221, so that the magnets 320 can be assembled after the hot sleeve process assembly of the rotor core 200 and the rotation shaft 110 is completed.

[0117] The rotor core 200 provided by the present disclosure can be assembled after the first pressing plate 21 and the second pressing plate 22 are assembled, and since the rotor core 200 is not provided with the magnets 320 during the hot sleeve connection of the rotor core 200 and the rotation shaft 110, the magnets 320 are effectively prevented from being heated at high temperature, thereby improving the service life of the motor.

[0118] The rotor provided by the present disclosure comprises at least two magnets 320, and in order to avoid the magnetic leakage phenomenon, the width of the magnetic isolation bridge 234 between the adjacent magnets 320 in the circumferential direction of the rotor is small. The rotor provided by the present disclosure is characterized in that the projections of the first pressing plate slot 211 and the second pressing plate slot 221 in the axial direction of the rotor core 200 are arranged alternately, which avoids the generation of a structural bridge on the first pressing plate 21 or the second pressing plate 22, the width of which is substantially equivalent to that of the magnetic isolation bridge 234, thereby ensuring the structural strength of the first pressing plate 21 and the second pressing plate 22 and further improving the use reliability of the rotor.

[0119] As shown in FIG. 8 and FIG. 9, the wind turbine generator set provided by the embodiment of the present disclosure includes a tower 20, a nacelle 30, a generator 10, and a rotor 40. The tower 20 is connected to a wind turbine foundation. The nacelle 30 is arranged at the top end of the tower 20. The generator 10 is arranged in the nacelle 30. In some examples, the generator 10 can be located outside the nacelle 30. Of course, in some examples, the generator 10 can also be located inside the nacelle 30. The rotor 40 includes a hub 410 and a plurality of blades 420 connected to the hub 410. When wind acts on the blades 420, the rotor 40 is driven to rotate, and further drives the rotor 1 of the generator 10 to rotate relative to the stator 2, so as to convert wind energy into electrical energy.

[0120] The generator 10 generates heat during operation. In order to ensure that the generator 10 is not affected by heat and normally operates, the generator 10 needs to be cooled and radiated. As the rotating speed of the generator 10 increases, the diameter of the permanent magnet generator is small, and the power of the permanent magnet generator 10 increases or the heat dissipation area of the rotor 1 decreases, which leads to over-temperature of the magnet 320 and loss of performance, and affects the reliability of the generator 10.

[0121] As shown in FIG. 9, based on this, the embodiment of the present disclosure further provides a new generator 10, which includes a rotor 1 and a stator 2. The rotor 1 and the stator 2 are coaxially arranged and rotationally matched. The generator 10 can adopt an inner rotor and outer stator structure form. Of course, in some examples, the generator 10 can also adopt an outer rotor and inner stator structure form.

[0122] The rotor 1 provided by the embodiment of the present disclosure can be produced or sold as an independent product, and of course, can also be used in the generator 10 and as a component of the generator 10.

[0123] As shown in FIG. 10 to FIG. 16, the rotor 1 provided by the embodiment of the present disclosure includes a rotating shaft 110, a rotor core 200, and a magnetic pole module 300. The rotor core 200 is sleeved on the rotating shaft 110 and is fixed in position relative to the rotating shaft 110. The rotor core 200 is provided with a radial air duct 210 and a magnet mounting groove 220. The magnet mounting groove 220 extends along the axial direction X of the rotating shaft 110. The radial air duct 210 extends through the rotor core 200 along the radial direction Z of the rotating shaft 110. The magnetic pole module 300 is inserted into the magnet mounting groove 220. The magnetic pole module 300 includes a positioning piece 310 and a magnet steel group. The magnet steel group can include at least two magnets 320. The at least two magnets 320 are distributed along the axial direction X and are connected to the positioning piece 310 respectively. The at least two magnets 320 can be inserted into the magnet mounting groove 220 as a whole, which improves the assembly efficiency of the magnets 320 and further improves the assembly efficiency of the rotor.

[0124] As an example, the at least two magnets 320 can be spaced apart along the axial direction X of the rotor core 200 to form a ventilation gap 330 between any two adjacent magnets 320, and the radial air duct 210 is in communication with the ventilation gap 330 in the case that the magnetic pole module 300 is inserted into the magnet mounting groove 220.

[0125] The rotor core 200 is sleeved on the rotating shaft 110, and the relative positions of the two can be fixed by key connection. Of course, the rotor core 200 and the rotating shaft 110 can be connected by interference fit, and the connection between the two can be achieved by high-temperature shrinkage.

[0126] The number of radial air ducts 210 provided on the rotor core 200 is multiple, and the multiple radial air ducts 210 can extend along the radial direction Z of the rotating shaft 110 and penetrate the rotor core 200. Alternatively, the multiple radial air ducts 210 can be spaced apart along the axial direction X of the rotating shaft 110, and the spacing between any two adjacent radial air ducts 210 can be equal to ensure uniform cooling and heat dissipation.

[0127] The number of magnet mounting grooves 220 provided on the rotor core 200 can be multiple, and each magnet mounting groove 220 extends along the axial direction X. When the number of magnet mounting grooves 220 is multiple, the multiple magnet mounting grooves 220 can be distributed along the circumferential direction Y of the rotating shaft 110, and the multiple magnet mounting grooves 220 can be spaced apart and uniformly distributed along the circumferential direction Y of the rotating shaft 110.

[0128] The number of magnetic pole modules 300 provided in each magnet mounting groove 220 can be one, two or more. When the number of magnetic pole modules 300 is two or more, the two or more magnetic pole modules 300 can be distributed along the axial direction X, and the two magnets facing each other in any two adjacent magnetic pole modules located in the same magnet mounting groove 220 are spaced apart and form an inter-module ventilation gap, which can be in communication with the radial air duct 210. As an example, the height of the inter-module ventilation gap and the height of the ventilation gap 330 can be the same along the axial direction of the rotor core 200, but this is not limited. The present embodiment takes the example that the inter-module ventilation gap and the ventilation gap 330 are the same.

[0129] The two adjacent magnetic pole modules 300 located in the same magnet mounting groove 220 can be arranged in abutment or spaced apart. When the two magnetic pole modules 300 are arranged in abutment, the outer surfaces of the two edge covering portions 311 can be in abutment (as shown in FIG. 20). Due to the second limiting block 35 provided at the end of the magnetic pole module 300, the two magnets 320 facing each other in the two adjacent magnetic pole modules are spaced apart, and the inter-module ventilation gap is formed.

[0130] The number of the magnets 320 included in the magnetic pole module 300 can be two, three or more, each of the magnets 320 can be fixedly connected with the positioning member 310 by means of bonding or the like, or can be connected by means of buckling, so as to fix the distance between the adjacent two magnets 320 by the positioning member 310, and form the ventilation gap 330.

[0131] The positioning member 310 can adopt a positioning box shape, a positioning frame shape or the like.

[0132] The radial air duct 210 and the ventilation gap 330 can be arranged oppositely in the radial direction Z, or can be partially staggered, and can be optionally arranged oppositely in the radial direction Z. The number of the radial air duct 210 and the ventilation gap 330 can be equal, or one of them can be less than the other. Alternatively, the number of the radial air duct 210 and the ventilation gap 330 can be equal and arranged one by one in the radial direction Z.

[0133] The magnetic pole module 300 in the present disclosure can be produced or sold as an independent product, and of course, can also be used for a rotor and as a component of the rotor.

[0134] The rotor 1 provided by one embodiment of the present disclosure includes a rotating shaft 110, a rotor core 200 and a magnetic pole module 300. The rotor core 200 is sleeved on the rotating shaft 110 and fixed in position relative to the rotating shaft 110. By providing a magnet mounting groove 220 on the rotor core 200, the plug-in installation of the magnetic pole module 300 can be realized through the magnet mounting groove 220, so as to ensure the installation requirement of the magnetic pole module 300. Since the magnetic pole module 300 includes a positioning member 310 and a magnetic steel group, the magnetic steel group includes at least two magnets 320, and the relative position between the at least two magnets 320 can be fixed by the positioning member 310. Since the ventilation gap 330 is formed between the adjacent two magnets 320, and the ventilation gap 330 is communicated with the radial air duct 210, the cooling air flow can pass through the radial air duct 210 and the ventilation gap 330, so as to realize the cooling and heat dissipation requirement of the rotor 1, and improve the reliability of the generator 10 in which the rotor 1 is located. Moreover, the structure of the rotor 1 makes it possible to first connect and fix the rotor core 200 and the rotating shaft 110 by means of high-temperature hot fitting, and then install the magnetic pole module 300 in the magnet mounting groove 220, so as to facilitate the assembly and use requirement of the rotor 1 for the high-speed rotating motor.

[0135] As shown in FIGS. 16-19, in some alternative embodiments, the rotor 1 provided by one embodiment of the present disclosure further comprises the first limiting block 34 and the second limiting block 35, which are arranged between the adjacent two magnets 320 in the axial direction X, and the second limiting block 35 is arranged at the end of the outermost two magnets 320 away from each other of the magnetic pole module 300. The first limiting block 34 and the second limiting block 35 are respectively connected with the positioning member 310 and the magnet 320.

[0136] The first limiting block 34 and the second limiting block 35 can have the same structure, and of course, there can be differences, for example, the height dimension of the first limiting block 34 and the second limiting block 35 in the axial direction X can be different.

[0137] In the axial direction X, the first limiting block 34 is arranged between each adjacent two magnets 320. Optionally, at least two first limiting blocks 34 are arranged between each adjacent two magnets 320, and the first limiting blocks 34 arranged between the adjacent two magnets 320 can be distributed in the circumferential direction Y.

[0138] In the axial direction X, two or more second limiting blocks 35 are arranged at the end of the outermost two magnets 320 away from each other of the magnetic pole module 300. The second limiting blocks 35 arranged at the same side can be distributed in the circumferential direction Y. The first limiting block 34 can be fixedly connected with the magnet 320 and the positioning member 310 by bonding or the like. The second limiting block 35 can also be connected with the magnet 320 and the positioning member 310 by bonding or the like.

[0139] The rotor 1 provided by one embodiment of the present disclosure can support the relative position between the adjacent two magnets 320 by the first limiting block 34, which is arranged in the magnetic pole module 300, and the position relationship between the first limiting block 34, the second limiting block 35 and the magnet 320 is limited, which is beneficial to the formation and maintenance of the ventilation gap 330. In addition, by arranging the second limiting block 35, when the number of the magnetic pole modules 300 arranged in the same magnet mounting groove 220 is two or more, the formation and maintenance of the ventilation gap 330 between the magnets 320 of the adjacent two magnetic pole modules 300 can be ensured.

[0140] In some alternative embodiments, the rotor 1 provided by one embodiment of the present disclosure comprises the positioning portion 321 arranged at both sides of the magnet 320 in the axial direction X, and the first limiting block 34 and the second limiting block 35 are respectively clamped in the corresponding positioning portion 321 of the magnet 320.

[0141] The shape of the positioning portion 321 can match the shape of the first limiting block 34 or the second limiting block 35 arranged correspondingly, and part of the first limiting block 34 and the second limiting block 35 can extend into the corresponding positioning portion 321.

[0142] The rotor 1 provided by the embodiment of the present disclosure can realize the position limitation of the first limiting block 34 and the second limiting block 35 through the positioning portion 321, avoid the position shift of the first limiting block 34 and the second limiting block 35 relative to the magnet 320, and ensure the stability of the ventilation gap 330 by arranging the positioning portion 321 and allowing the first limiting block 34 and the second limiting block 35 to be clamped on the positioning portion 321 arranged correspondingly on the magnet 320. In addition, the above arrangement can also reduce the assembly difficulty between the first limiting block 34, the second limiting block 35, the magnet 320 and the positioning member 310, and improve the assembly efficiency.

[0143] In some optional embodiments, the rotor 1 provided by the embodiment of the present disclosure is arranged in pairs with the first limiting block 34 and the second limiting block 35, and the first limiting block 34 arranged in pairs is distributed at intervals in the circumferential direction Y of the rotating shaft 110, and the second limiting block 35 arranged in pairs is distributed at intervals in the circumferential direction Y. In the embodiment, the positioning portion 321 on each side of the magnet 320 along the axial direction of the rotating shaft 110 is two, and the two positioning portions 321 are arranged on both sides of the magnet 320 in the circumferential direction of the rotating shaft 110.

[0144] Alternatively, the magnet 320 can be arranged with the positioning portion 321 on both sides in the circumferential direction Y of the rotating shaft 110, and the first limiting block 34 arranged in pairs and the second limiting block 35 arranged in pairs are respectively inserted into the corresponding positioning portion 321. As an example, the positioning portion 321 can be a groove or a step arranged on the magnet 320, but is not limited thereto.

[0145] The rotor 1 provided by the embodiment of the present disclosure can support the adjacent magnets 320 at both ends of the circumferential direction Y to ensure the formation of the ventilation gap 330 and the stability of the relative position between the two adjacent magnets 320, thereby ensuring the power generation performance and the cooling and heat dissipation function when applied to the generator 10, by arranging the first limiting block 34 and the second limiting block 35 in pairs and at intervals in the circumferential direction Y.

[0146] Continuing to refer to FIGS. 14-19, in some optional embodiments, the rotor 1 provided by the embodiment of the present disclosure is arranged with two or more magnetic pole modules 300 in the axial direction X in the magnet mounting groove 220, and the two adjacent magnetic pole modules 300 are arranged at intervals with the magnets 320 facing each other and forming the ventilation gap 330.

[0147] The number of the magnetic pole modules 300 arranged in the same magnet mounting slot 220 along the axial direction X can be two, three or more, and a ventilation gap 330 is formed between each two adjacent magnetic pole modules 300.

[0148] The rotor 1 provided by the embodiment of the present disclosure can shorten the length of the single magnetic pole module 300 along the axial direction X, improve the strength of the single magnetic pole module 300, and reduce the deformation of the magnetic pole module 300 caused by gravity and affecting the performance of the rotor 1, on the basis of ensuring that the rotor 1 meets the power generation requirements of the generator 10, by arranging two or more magnetic pole modules 300 in the magnet mounting slot 220. In addition, the ventilation gap 330 formed between the two adjacent magnetic pole modules 300 can ensure the ventilation and heat dissipation requirements between the magnets 320 of the two adjacent magnetic pole modules 300, and improve the reliability of the rotor 1.

[0149] As shown in FIGS. 16-20, in some alternative embodiments, the rotor 1 provided by the embodiment of the present disclosure has the following characteristics: along the axial direction X, the thickness d1 of the first limiting block 34 is greater than the thickness d2 of the second limiting block 35, and each of the two adjacent magnetic pole modules 300 has the second limiting block 35 at one end thereof which faces the other end.

[0150] The rotor 1 provided by the embodiment of the present disclosure can ensure the uniformity of the cooling and heat dissipation requirements of the rotor 1 by making the thickness d1 of the first limiting block 34 greater than the thickness d2 of the second limiting block 35, so that the size of the ventilation gap 330 formed by the abutment of the two adjacent magnetic pole modules 300 is close to the size of the ventilation gap 330 formed between the two adjacent magnets 320 of the same magnetic pole module 300.

[0151] Along the axial direction X, the thickness d1 of the first limiting block 34 can be twice the thickness d2 of the second limiting block 35. By the above arrangement, the size of the ventilation gap 330 formed by the abutment of the two adjacent magnetic pole modules 300 is substantially the same as the size of the ventilation gap 330 formed between the two adjacent magnets 320 of the same magnetic pole module 300, which reliably ensures the uniformity of the cooling and heat dissipation requirements of the rotor 1.

[0152] As shown in FIGS. 16-20, in some alternative embodiments, the rotor 1 provided by the embodiment of the present disclosure has the following characteristics: the positioning member 310 includes two edge covering portions 311, the edge covering portions 311 are distributed on both sides of the magnet 320 along the circumferential direction Y of the rotor shaft 110, and the magnet 320 is inserted and fixed in the corresponding edge covering portion 311 at both ends of the circumferential direction Y, for example but not limited to, the two edge covering portions 311 are symmetrically distributed along the circumferential direction Y of the rotor shaft 110.

[0153] The structure of the pair of edge covering portions 311 can be the same, and each magnet 320 can be inserted into one of the edge covering portions 311 at one end in the circumferential direction Y and inserted into the other edge covering portion 311 at the other end in the circumferential direction Y. When the magnetic pole module 300 includes the first limiting block 34 and the second limiting block 35, the first limiting block 34 and the second limiting block 35 can also be inserted into the edge covering portion 311 on the corresponding side.

[0154] The rotor 1 provided by the embodiment of the present disclosure can facilitate limiting the position of each magnet 320 by the pair of edge covering portions 311, and ensure the stability of the gap value of the ventilation gap 330, by causing the positioning member 310 to include the pair of edge covering portions 311 and defining the distribution positions of the two and the matching relationship with the magnet 320. In addition, the above-mentioned arrangement can modularize the magnetic pole module 300 and reduce the production cost.

[0155] Alternatively, the magnet 320, the first limiting block 34, the second limiting block 35, and the edge covering portion 311 can be connected and fixed by using an adhesive.

[0156] As shown in FIGS. 16-20, in some optional embodiments, the magnet 320 is provided with an avoiding portion 322 on each side in the radial direction Z of the rotating shaft 110, and the magnet 320 is connected with the positioning member 310 by the avoiding portion 322. As an example, the avoiding portion 322 can be a groove or a step provided on the magnet 320, but is not limited thereto.

[0157] The avoiding portion 322 can extend a predetermined length along the circumferential direction Y from the end face of the magnet 320 in the circumferential direction Y, and the extension length can match the extension length of the positioning member 310 in the circumferential direction Y. Alternatively, the extension length of the avoiding portion 322 on each side in the circumferential direction Y can match the extension length of the edge covering portion 311 on the same side.

[0158] Alternatively, the avoiding portion 322 can be provided through the magnet 320 in the axial direction X.

[0159] Alternatively, the positioning member 310 can partially extend into the avoiding portion 322 in the radial direction Z and be fixedly connected with the magnet 320, and can be fixedly connected by using an adhesive.

[0160] The rotor 1 provided by the embodiment of the present disclosure can ensure the position limiting requirement of each magnet 320, and at the same time, can reduce the size of the positioning member 310 protruding from the magnet 320 in the radial direction Z, thereby reducing the distance between the magnet steel surface and the rotor core 200, causing less damage to the magnetic field, and optimizing the electrical performance of the rotor 1, by causing the magnet 320 to be provided with an avoiding portion 322 on each side in the radial direction Z of the rotating shaft 110, and causing the positioning member 310 to partially extend into the avoiding portion 322 and be fixedly connected with the magnet 320.

[0161] The magnet 320 provided by one embodiment of the present disclosure can be produced or sold as a stand-alone product, or can be used in a magnetic pole module and as a component of the magnetic pole module. Alternatively, the magnet 320 can be used in a rotor and as a component of the rotor.

[0162] As an example, according to an example embodiment of the present disclosure, a magnet is provided for installation in a rotor core, the magnet comprising a magnet body and a mounting portion provided on the magnet body, the mounting portion being provided at two ends of the magnet body in a circumferential direction of the rotor core, the mounting portion being recessed relative to the magnet body on two side faces opposite in an axial direction of the rotor core, and / or the mounting portion being recessed relative to the magnet body on two side faces opposite in a radial direction of the rotor core.

[0163] As an example, the mounting portion is recessed relative to the magnet body on the two side faces opposite in the axial direction of the rotor core to form a positioning portion 321, and the mounting portion is recessed relative to the magnet body on the two side faces opposite in the radial direction of the rotor core to form a relief portion 322.

[0164] In some optional embodiments, when the positioning member 310 comprises a pair of the wrapping portions 311, one of the wrapping portions 311 can be arranged to extend into the corresponding relief portion 322 in the radial direction Z and be fixedly connected to the magnet 320.

[0165] In some optional embodiments, the rotor 1 provided by one embodiment of the present disclosure, the magnet 320 can comprise a main body segment 32a and a fitting segment 32b, the main body segment 32a is provided with the fitting segment 32b at two ends thereof in the circumferential direction Y, the cross-sectional area of the fitting segment 32b is smaller than that of the main body segment 32a along the circumferential direction Y, and the relief portion 322 and the positioning portion 321 are both located in the fitting segment 32b.

[0166] Optionally, the relief portion 322 and the positioning portion 321 both extend along the circumferential direction Y, the relief portion 322 is arranged through the magnet 320 in the axial direction X, and the positioning portion 321 is arranged through the magnet 320 in the radial direction Z. By arranging the relief portion 322 and the positioning portion 321, the cross-sectional size of the fitting segment 32b is smaller than that of the main body segment 32a, the relief portion 322 is recessed in the radial direction Z, the positioning portion 321 is recessed in the axial direction X, and the relief portion 322 is connected to the positioning portion 321.

[0167] The rotor 1 provided by one embodiment of the present disclosure is beneficial to the cooperation of the first limiting block 34, the second limiting block 35, the magnet 320, and the positioning member 310 by the above arrangement.

[0168] As shown in FIGS. 16-21, in some optional embodiments, the rotor 1 provided by one embodiment of the present disclosure, the positioning member 310 is partially protruding from the magnet 320, and the magnet 320 is arranged spaced apart from the rotor core 200.

[0169] Optionally, when the positioning member 310 comprises the pair of edge covering portions 311, the pair of edge covering portions 311 can be respectively arranged such that both ends of each edge covering portion 311 in the radial direction Z protrude the magnetic body 320.

[0170] Due to the strong magnetic field between the magnetic body 320 and the rotor core 200, the rotor 1 provided by the embodiment of the present disclosure is arranged such that, when the magnetic pole module 300 is assembled, the edge covering portion 311 is closer to the rotor core 200 than the surface of the magnetic body 320, so that when the magnetic pole module 300 is installed, the attraction does not cause damage to the surface coating of the magnetic body 320, reducing the risk of rust.

[0171] As shown in FIG. 22 and FIG. 23, in some optional embodiments, the rotor 1 provided by the embodiment of the present disclosure is arranged such that the pair of edge covering portions 311 are respectively in the form of a box structure and are arranged with openings at one end thereof in the circumferential direction Y, and the plurality of magnetic bodies 320 are respectively inserted into the corresponding edge covering portions 311 through the openings at both ends thereof in the circumferential direction Y and are fixedly connected with the edge covering portions 311.

[0172] Optionally, the edge covering portion 311 can be in the form of a rectangular box and is arranged with an opening at one end thereof in the circumferential direction Y and facing the magnetic body 320.

[0173] The rotor 1 provided by the embodiment of the present disclosure is arranged such that the edge covering portion 311 has a simple structure and can limit the plurality of magnetic bodies 320 in the circumferential direction Y, the axial direction X and the radial direction Z, thereby ensuring that the plurality of magnetic bodies 320 are connected as a whole and have a stable relative position, and the edge covering portion 311 has the above-mentioned structure, so that the wall thickness of each part thereof is relatively thin, thereby ensuring that the magnetic field damage can be reduced under the condition of installation and fixation of the plurality of magnetic bodies 320.

[0174] Optionally, when the first limiting block 34 and the second limiting block 35 are included, the first limiting block 34 and the second limiting block 35 are respectively inserted into the edge covering portion 311 on the side thereof in the axial direction X. The second limiting block 35 at both ends thereof in the axial direction X can be clamped between the positioning member 310 and the magnetic body 320 in the axial direction X, and optionally, can be clamped between the corresponding edge covering portion 311 and the magnetic body 320.

[0175] In some optional embodiments, the rotor 1 provided by the embodiment of the present disclosure is arranged such that the edge covering portion 311 can comprise an end plate 311a, a pair of first plates 311b arranged in the radial direction Z, and a pair of second plates 311c arranged in the axial direction X, each of the first plates 311b and the second plates 311c is connected with the end plate 311a at one end thereof in the circumferential direction Y, and the pair of first plates 311b is partially inserted into the corresponding avoiding portion 322. The second plate 311c abuts against the second limiting block 35 in the axial direction X.

[0176] The rotor 1 provided by one of the embodiments of the present disclosure has the edge covering part 311 in the above structure, which is beneficial to the installation and position limitation of the magnet 320, the first limiting block 34 and the second limiting block 35.

[0177] As shown in FIG. 22, in some optional embodiments, the rotor 1 provided by one of the embodiments of the present disclosure can be formed in a punching manner, and the surrounding edge around the rotor 1 can be closed in this way. Of course, this is an optional implementation. As shown in FIG. 23, in some embodiments, the rotor 1 can also be formed in a bending manner, and the surrounding edge can be overlapped if the rotor 1 is formed in the bending manner.

[0178] Optionally, the edge covering part 311 of the positioning member 310 provided by one of the embodiments of the present disclosure can be made of a non-magnetic stainless steel material, or can be made of other non-magnetic structures such as a plastic body.

[0179] In some optional embodiments, the rotor 1 provided by one of the embodiments of the present disclosure is provided with an axial air duct 260 extending along the axial direction X on the rotor core 200, and the axial air duct 260 is in communication with the radial air duct 210 and the ventilation gap 330.

[0180] The number of the axial air ducts 260 can be multiple, and the multiple axial air ducts 260 are distributed in the circumferential direction Y of the shaft 110, and can be optionally distributed in an interval and uniformly.

[0181] The rotor 1 provided by one of the embodiments of the present disclosure is beneficial to the entry of the cooling air flow by arranging the axial air duct 260, and the axial air duct 260 is in communication with the radial air duct 210 and the ventilation gap 330, so that the cooling air flow entering from the axial air duct 260 can flow through the radial air duct 210 and the ventilation gap 330 to take away the heat generated by the rotor core 200 and the magnet 320, thereby ensuring the cooling and heat dissipation requirement of the rotor 1 and improving the reliability of the rotor 1.

[0182] The generator 10 provided by one of the embodiments of the present disclosure includes the rotor 1 provided by the above embodiments, and on the basis of ensuring the power generation requirement, the cooling air flow can pass through the radial air duct 210 and the ventilation gap 330 to achieve the cooling and heat dissipation requirement of the rotor 1, thereby improving the reliability of the generator 10 in which the rotor 1 is arranged.

[0183] As shown in FIG. 24, in another aspect, the present disclosure also provides a manufacturing method of a rotor 1, which can be used to manufacture the rotor 1 provided by the above embodiments, and the manufacturing method comprises the following steps:

[0184] S100, providing a shaft 110 and a rotor core 200, and the rotor core 200 is provided with a magnet installation groove 220 extending along the axial direction X of the shaft 110.

[0185] S200, heating the rotor core 200 to a preset temperature, and sleeving the rotor core 200 heated to the preset temperature on the rotating shaft 110 and cooling to connect the rotor core 200 and the rotating shaft 110.

[0186] S300, providing a magnetic pole module 300, the magnetic pole module 300 comprising a positioning member 310 and a plurality of magnets 320, the plurality of magnets 320 being connected with the positioning member 310 respectively.

[0187] S400, inserting the magnetic pole module 300 into the magnet mounting groove 220 to distribute the magnetic pole module 300 along the axial direction X of the rotating shaft 110, so that the magnetic pole module 300 is assembled after the rotating shaft 110 and the rotor core 200 are connected, and in the process of heating the rotor core 200, the magnetic pole module 300 can be avoided from being heated and the magnets 320 can be avoided from being affected by high temperature.

[0188] As an example, the rotor core 200 can also be provided with a radial air duct 210, the radial air duct 210 being arranged through the rotor core 200 along the radial direction Z of the rotating shaft 110. A ventilation gap 330 can be formed between two adjacent magnets 320, and when the magnetic pole module 300 is mounted on the rotor core 200, the radial air duct 210 can be communicated with the ventilation gap 330, thereby facilitating heat dissipation during use of the rotor.

[0189] In step S100, the magnet mounting groove 220 and the radial air duct 210 arranged on the rotor core 200 both comprise a plurality of magnet mounting grooves 220 which can be arranged at intervals in the circumferential direction Y, and a plurality of radial air ducts 210 which can be arranged at intervals in the axial direction X.

[0190] In step S200, before the magnetic pole module 300 is mounted, the rotor core 200 is first fixedly connected with the rotating shaft 110 by means of high-temperature shrinkage fitting.

[0191] In step S300, the provided magnetic pole module 300 can also include a first limiting block 34 and a second limiting block 35. The first limiting block 34 is clamped between two adjacent magnets 320. The second limiting block 35 is arranged at the end of the outermost two magnets 320 away from each other. The first limiting block 34 and the second limiting block 35 are respectively connected with the positioning member 310 and the magnet 320. Optionally, the first limiting block 34 and the second limiting block 35 are arranged in pairs. The first limiting blocks 34 arranged in pairs can be distributed at intervals. The second limiting blocks 35 arranged in pairs can be distributed at intervals. Optionally, the thickness of the first limiting block 34 is greater than the thickness of the second limiting block 35. The end of the adjacent two magnetic pole modules 300 towards each other respectively has the second limiting block 35. Optionally, the magnet 320 is respectively provided with a avoiding part 322 on both sides of the radial direction Z of the rotating shaft 110. The positioning member 310 partially protrudes into the avoiding part 322 and is fixedly connected with the magnet 320. Optionally, the positioning member 310 partially protrudes from the magnet 320. Optionally, the positioning member 310 can include a pair of edge covering parts 311. Optionally, the edge covering parts 311 arranged in pairs respectively have a box-shaped structure and are open at the end of the circumferential direction Y towards each other. The plurality of magnets 320 are respectively inserted into the corresponding edge covering part 311 at both ends of the circumferential direction Y and are fixedly connected with the edge covering part 311. Optionally, the magnetic pole module can adopt the structure of the above-mentioned embodiments in the rotor 1, which will not be described here.

[0192] In step S400, optionally, along the axial direction X, two or more magnetic pole modules 300 are arranged in the magnet mounting groove 220. The magnets 320 of the adjacent two magnetic pole modules 300 in the same magnet mounting groove 220 are arranged at intervals and form an inter-module ventilation gap.

[0193] The manufacturing method provided by one embodiment of the present disclosure can meet the molding requirements of the rotor 1 provided by the above-mentioned embodiments. The manufacturing method is suitable for high-speed rotating motors. The rotor core 200 is separately manufactured. The rotor core 200 is first connected and fixed with the rotating shaft 110 by high-temperature shrinkage or the like. Then the magnetic pole module 300 is installed and the ventilation gap 330 is formed. The cooling and heat dissipation requirements can be guaranteed. At the same time, the performance of the magnet 320 can be avoided from being affected by high temperature. The reliability of the formed rotor 1 is improved.

[0194] FIG. 25 is a schematic view of a generator rotor according to an embodiment of the present disclosure, FIG. 26 is a schematic view of the generator rotor of FIG. 25 with the shaft omitted, FIG. 27 is a schematic view of a portion of an axial cross-sectional view of the generator rotor of FIG. 26 according to a first embodiment of the present disclosure, FIG. 28 is a schematic view of a spacer according to an embodiment of the present disclosure, FIGS. 29 to 34 are schematic views of a manufacturing method of the generator rotor according to the first embodiment of the present disclosure, FIG. 35 is a schematic view of a portion of an axial cross-sectional view of the generator rotor of FIG. 26 according to a second embodiment of the present disclosure, FIG. 36 is a schematic view of one manufacturing method of the generator rotor according to the second embodiment of the present disclosure, FIG. 37 is an enlarged view of portion I of FIG. 36, and FIG. 38 is a schematic view of another manufacturing method of the generator rotor according to the second embodiment of the present disclosure.

[0195] The rotor 1 according to an embodiment of the present disclosure includes a shaft 110, a plurality of rotor segments 120 stacked on the shaft 110 in an axial direction of the shaft 110, each rotor segment 120 including a core segment and a magnet fixed to the core segment, and a spacer 150 disposed between adjacent rotor segments 120 to space the adjacent rotor segments 120 apart from each other in the axial direction to form a radial ventilation passage.

[0196] According to an embodiment of the present disclosure, as shown in FIGS. 25 and 26, the rotor 1 can include the shaft 110 and the plurality of rotor segments 120. The plurality of rotor segments 120 can be stacked on the shaft 110 in the axial direction of the shaft 110. Each rotor segment 120 can include a core segment and a magnet fixed to the core segment, which will be described later in detail. The spacer 150 (as shown in FIGS. 28 and 31) can be disposed between the adjacent rotor segments 120, and by disposing the spacer 150 between the adjacent rotor segments 120, the adjacent rotor segments 120 can be spaced apart from each other in the axial direction, so that the radial ventilation passage can be easily formed. The radial ventilation passage can allow cooling air to flow inside the generator rotor, thereby taking away heat generated during operation, having the advantages of good heat dissipation effect and uniform temperature distribution.

[0197] As shown in FIG. 25, according to an embodiment of the present disclosure, the rotor 1 can further include a pole pressing plate 130, which can be disposed at both axial ends of the stack formed by the rotor segments 120.

[0198] According to an embodiment of the present disclosure, the rotor 1 can further include an axial tie rod 140, which can pass through the rotor segments 120 in the axial direction and be fastened to the pole pressing plate 130 with bolts, so as to tightly combine the stack formed by the rotor segments 120. In the circumferential direction of the rotor 1, a plurality of axial tie rods 140 can be formed, which can be equally spaced apart from each other. It should be understood that the axial tie rod 140 can also be omitted according to the stacking ability of the rotor segments 120.

[0199] According to an embodiment of the present disclosure, the rotor 1 can further include axial air ducts 260 which can pass through the rotor segments 120 and the pole plates 130 in the axial direction. A plurality of axial air ducts 260 can be formed along the circumferential direction of the rotor 1, and the plurality of axial air ducts 260 can be equidistantly spaced from each other. The axial air ducts 260 can allow cooling air to flow inside the generator rotor, thereby taking away heat generated during operation, and have the advantages of good heat dissipation effect and uniform temperature distribution.

[0200] Hereinafter, two embodiments of the generator rotor, the corresponding manufacturing methods, and the specific structure of the isolation strip 150 will be described.

[0201] FIG. 27 shows an axial cross-sectional view of the generator rotor according to the first embodiment of the present disclosure. As shown in FIG. 37, the core segment of each rotor segment 120 includes a first core segment 121 and a second core segment 122 which are in contact with each other. Two adjacent rotor segments 120 are separated by a certain distance by the isolation strip 150 described in FIG. 28 to form a radial air duct. The generator rotor shown in FIG. 27 forms a rotor segment stack by stacking a first pole module M1, a plurality of second pole modules M2, and a first pole module M1 in the axial direction. Among them, the first pole module M1 includes one first core segment 121, the second pole module M2 includes one second core segment 122 and one first core segment 121, and the isolation strip 150 is arranged between the second core segment 122 and the first core segment 121.

[0202] FIG. 28 shows the structure of the isolation strip 150. As shown in FIG. 28, the isolation strip 150 includes a separation body 151, a first clamping portion 152 arranged on a first side of the separation body 151, and a second clamping portion 153 arranged on a second side of the separation body 151 opposite the first side, the first clamping portion 152 is fixed to the core segment of one of the adjacent rotor segments 120, and the second clamping portion 153 is fixed to the core segment of the other of the adjacent rotor segments 120. As an example, a pair of first clamping portions 152 and a pair of second clamping portions 153 can be arranged along the extension direction (e.g., the length direction) of the isolation strip 150, the pair of first clamping portions 152 are spaced from each other in the extension direction, the pair of second clamping portions 153 are spaced from each other in the extension direction, and the first clamping portions 152 can be arranged at positions corresponding to the second clamping portions 153. However, it should be understood that the number and arrangement position of the first clamping portions 152 and the number and arrangement position of the second clamping portions 153 are not particularly limited, but can be adjusted according to the length of the isolation strip 150, etc.

[0203] According to an embodiment of the present disclosure, as shown in FIG. 28, the end of the first clamping portion 152 is formed with a pair of first chamfers 152a opposite to each other in a direction parallel to the extending direction of the partition body 151. The end of the second clamping portion 153 is formed with a pair of second chamfers 153a opposite to each other in a direction parallel to the extending direction of the partition body 151 and a pair of third chamfers 153b opposite to each other in a direction perpendicular to the extending direction of the partition body 151. The third chamfer 153b is smaller than the second chamfer 153a and the first chamfer 152a. As an example, the second chamfer 153a can be equal to the first chamfer 152a.

[0204] According to an embodiment of the present disclosure, the side formed with the third chamfer 153b (i.e., the side of the small chamfer) is the chamfer required for the rear installation side of the core segment. This is because if the rotor segment stack is installed tightly, it will be more difficult to install the side of the rear installed core segment, and by forming a small chamfer, the rear installed core segment and the partition strip 150 can be more easily clamped together. In addition, it should be understood that if the matching size allows, the third chamfer 153b as a small chamfer can also not be formed.

[0205] FIGS. 29 and 30 show the assembly manner of the first magnetic pole module M1. Among them, FIG. 29 shows the first core segment 121 (i.e., the first core segment 121 of the rotor segment 120) of the first magnetic pole module M1. As shown in FIG. 29, the first core segment 121 can include a first core segment base body 1211, a first axial ventilation hole 1212 forming an axial 2 air duct 260, a first magnet mounting slot 1213 for mounting a magnet (a first magnet 121a), a first partition mounting hole 1214 for mounting a partition strip, and a first key groove 1215 for combining with the key on the rotating shaft 110. As an example, the first magnet mounting slot 1213 can completely penetrate the first core segment base body 1211, and can be arranged at the edge of the first core segment base body 1211 along the circumferential direction of the first core segment base body 1211. As an example, the first partition mounting hole 1214 can be arranged along the radial direction of the first core segment base body 1211, so that the partition strip 150 can be mounted on the first core segment base body 1211 along the radial direction. In addition, along the circumferential direction of the first core segment base body 1211, a plurality of rows of first partition mounting holes 1214 can be arranged for arranging a plurality of partition strips 150 along the circumferential direction. In addition, as an example, the first core segment 121 can be formed by laminating the core and then welding or using a special process to bond, but the present disclosure does not make specific limitations thereto.

[0206] FIG. 30 shows the installation of the first magnet 121a to the first core segment 121 to form the first magnetic pole module M1. For example, the first magnet 121a can be fixed into the first magnet mounting slot 1213 by welding or bonding, etc.

[0207] FIGS. 31 to 33 illustrate the assembly of the second magnetic pole module M2. FIG. 31 illustrates the installation of the isolation strips 150 to the second core segment 122 (i.e., the second core segment 122 of the rotor segment 120) of the second magnetic pole module M2. As an example, the second core segment 122 can have the same structure as the first core segment 121. For example, the second core segment 122 can include a second core segment base 1221, second axial ventilation holes 1222 forming axial air passages 260, second magnet installation grooves 1223 for installing magnets (second magnets 122a), second partition installation holes 1224 for installing the isolation strips, and second key grooves 1225 for coupling with the rotation shaft 110.

[0208] As shown in FIG. 31, one end of the isolation strips 150 can be inserted into the second partition installation holes 1224, and specifically, the first engaging portions 152 of the isolation strips 150 can be inserted into the first partition installation holes 1214. In addition, as shown in FIG. 31, each of the isolation strips 150 can extend in the radial direction of the second core segment 122, and the plurality of isolation strips 150 can be spaced apart from each other in the circumferential direction of the second core segment 122. In addition, as shown in FIG. 31, at least a portion of the plurality of isolation strips 150 can extend to cover at least a portion of the second magnet installation grooves 1223, and thus at least a portion of the plurality of isolation strips 150 can extend to cover at least a portion of the second magnets 122a after the second magnets 122a are installed.

[0209] In addition, as shown in FIG. 31, a portion of the plurality of isolation strips 150 can extend in the radial direction between the axial air passages 260 adjacent to each other among the plurality of axial air passages 260, and another portion of the plurality of isolation strips 150 can extend in the radial direction from the radial end of the axial air passage 260 away from the center of the core segment. The lengths of the plurality of isolation strips 150 do not necessarily have to be the same, but can be designed flexibly according to the installation position.

[0210] According to embodiments of the present disclosure, the isolation strips 150 can function to position the magnets in addition to forming the radial ventilation passages. For example, when the isolation strips 150 extend to cover at least a portion of the magnets after the magnets are installed, the isolation strips 150 can form axial positioning of the magnets, prevent loss of magnetic flux due to non-coincidence of the magnets with the core segment, or prevent the magnets from moving in the core.

[0211] FIG. 32 illustrates the coupling of the first core segment 121 to the second engaging portions 153 of the isolation strips 150. According to the present disclosure, since the second engaging portions 153 are formed with third chamfers 153b (i.e., small chamfers), easy installation of the first core segment 121, which is installed later, can be ensured. The first core segment 121 in the present embodiment is the same as the first core segment 121 described with reference to FIG. 29, and thus a detailed description thereof will not be provided herein. In addition, according to the present disclosure, the first core segment 121 and the second core segment 122 can also be coupled to the isolation strips 150 by welding or adhesion.

[0212] Figure 33 shows that the first magnet 121a is installed to the first core segment 121 and the second magnet 122a is installed to the second core segment 122 to form the second magnetic pole module M2. According to the present disclosure, since there is magnetism of the magnets, if the magnets are installed first, it will be difficult to install the isolation strip 150 to the first core segment 121 and the second core segment 122 due to the strong magnetic field, so the first magnet 121a and the second magnet 122a are installed after the first core segment 121 and the second core segment 122 are connected with the isolation strip 150, so as to improve the assembly efficiency.

[0213] Figure 34 shows that the first magnetic pole module M1 and the second magnetic pole module M2 are installed. As shown in Figure 34, the first magnetic pole module M1 can be installed adjacent to the magnetic pole pressing plate 130 along the axial direction of the rotor shaft 110, and then a plurality of second magnetic pole modules M2 and the first magnetic pole module M1 are installed, so that the rotor 1 including a plurality of rotor segments 120 as shown in Figure 27 can be formed. Among them, the second core segment 122 and the first core segment 121 of the second magnetic pole module M2 form one core segment of two rotor segments 120 respectively, and the isolation strip 150 between the second core segment 122 and the first core segment 121 of the second magnetic pole module M2 forms a radial ventilation channel between the two rotor segments 120.

[0214] Figure 35 shows an axial sectional view of a generator rotor according to a second embodiment of the present disclosure. In the generator rotor of the first embodiment of Figure 27, the thickness of the rotor segment 120 between two adjacent radial ventilation channels is a, and each rotor segment 120 includes two core segments, and the thickness of each core segment is a / 2. In the generator rotor of the second embodiment shown in Figure 35, the thickness of the rotor segment 120 between two adjacent radial ventilation channels is a, and each rotor segment 120 only includes one third core segment 123, so the thickness of each core segment is a. According to the embodiments of the present disclosure, the structure of the third core segment 123 can be the same as that of the first core segment 121 and the second core segment 122, which will not be described in detail here.

[0215] Figure 36 shows one example of a manufacturing method of a generator rotor according to the second embodiment of the present disclosure. As shown in Figure 36, after the third core segment 123 is manufactured, the third magnet 123a can be assembled to form the rotor segment 120, that is, the third magnetic pole module M3. Then the third magnetic pole module M3 can be installed adjacent to the magnetic pole pressing plate 130 along the axial direction of the rotor shaft 110, and then the isolation strip 150 is installed and the above steps are repeated.

[0216] Figure 37 is an enlarged view of part I of Figure 36. As shown in Figure 37, the isolation strip 150 can extend to cover at least a part of the third magnet 123a.

[0217] Fig. 38 shows another example of the manufacturing method of the generator rotor according to the second embodiment of the present disclosure. As shown in Fig. 38, after the third core segment 123 is manufactured, the third core segment 123, the third magnet 123a and the isolation strip 150 can be sequentially sleeved on the rotating shaft 110 in the axial direction of the rotating shaft 110 adjacent to the magnetic pole pressing plate 130 and the above steps are repeated.

[0218] The above describes the generator rotor according to the two embodiments of the present disclosure and the manufacturing method thereof, the generator rotor according to the embodiments of the present disclosure can easily form the radial ventilation channel, and the manufacturing method of the generator rotor according to the embodiments of the present disclosure can improve the assembly efficiency.

[0219] In addition, according to the embodiments of the present disclosure, a generator including the above rotor 1 can also be provided. As an example, the generator can be a high-speed permanent magnet generator, however, the present disclosure is not limited thereto.

[0220] In addition, according to the embodiments of the present disclosure, a wind turbine generator set including the above generator can also be provided. However, it should be understood that the generator according to the present disclosure can also be applied to other devices, and is not limited to the wind turbine generator set.

[0221] The generator rotor and the manufacturing method thereof according to the embodiments of the present disclosure can achieve the beneficial technical effects not limited to the following description.

[0222] The generator rotor according to the present disclosure can easily form the radial ventilation channel, which can allow the cooling air to flow inside the generator rotor to take away the heat generated during operation, having the advantages of good heat dissipation effect and uniform temperature distribution.

[0223] The isolation strip in the generator rotor according to the present disclosure can not only form the radial ventilation channel, but also can play the role of positioning the magnet.

[0224] The manufacturing method of the generator rotor according to the present disclosure can improve the assembly efficiency and overcome the problem of low assembly efficiency in the magnet assembly method of the prior art.

[0225] It should be understood by those skilled in the art that the embodiments of the present disclosure described above and shown in the drawings are only examples and do not limit the present disclosure, and the purpose of the present disclosure has been fully and effectively achieved. The functions and structural principles of the present disclosure have been shown and described in the embodiments, and the embodiments of the present disclosure can have any modification or change without departing from the principles.

Claims

1. A rotor core, characterized in that, The rotor core (200) includes: The iron core body has multiple magnetic pole mounting positions spaced apart along its circumference. Each magnetic pole mounting position has a magnetic pole mounting groove for accommodating a magnet (320). The magnetic pole mounting groove extends through the iron core body along the axial direction of the rotor iron core (200). A pressure plate is disposed at the axial end of the iron core body. The pressure plate is provided with a pressure plate groove, which is aligned with the magnet mounting groove.

2. The rotor core as described in claim 1, characterized in that, Each of the magnetic pole mounting positions is provided with at least two magnet mounting slots, the magnet mounting slots including a first mounting slot (232) and a second mounting slot (233) that are spaced apart and alternately arranged along the circumference of the iron core body. The pressure plate includes a first pressure plate (21) and a second pressure plate (22), which are respectively disposed at both ends of the iron core body. The first pressure plate (21) is provided with a first pressure plate groove (211), which is aligned with the first mounting groove (232). The second pressure plate (22) is provided with a second pressure plate groove (221), which is aligned with the second mounting groove (233).

3. The rotor core as described in claim 2, characterized in that, The rotor core (200) further includes a magnet pressure plate (3), which is disposed on the outside of the first pressure plate (21) and covers the first pressure plate groove (211), and / or, the magnet pressure plate (3) is disposed on the outside of the second pressure plate (22) and covers the second pressure plate groove (221).

4. The rotor core as described in claim 3, characterized in that, The magnet pressure plate (3) includes a magnet pressure plate body (32) and a magnet pressure block (31). The magnet pressure plate body (32) is connected to the outside of the first pressure plate (21) and / or the second pressure plate (22). The magnet pressure block (31) extends from the magnet pressure plate body (32) toward the magnet (320) and abuts against the magnet (320).

5. The rotor core as described in any one of claims 2-4, characterized in that, The first pressure plate groove (211) is formed as a circumferentially closed through hole, or has a notch (224) on its radially outer side; and / or, the second pressure plate (22) is formed as a circumferentially closed through hole, or has a notch (224) on its radially outer side; and / or, The rotor core (200) further includes an axial tie rod (140). The core body is provided with a core tie rod mounting hole (236). The first pressure plate (21) and the second pressure plate (22) are respectively provided with pressure plate tie rod mounting holes. The pressure plate tie rod mounting holes are aligned with the core tie rod mounting holes (236). The axial tie rod (140) extends along the axial direction of the rotor core (200). The axial tie rod (140) is disposed in the core tie rod mounting hole (236) and the pressure plate tie rod mounting hole; and / or, The adjacent first mounting slot (232) and second mounting slot (233) are separated by a magnetic bridge (234).

6. The rotor core as described in any one of claims 2-4, characterized in that, The rotor core (200) further includes an isolation strip (150). The core body includes at least two core segments spaced apart along the axial direction of the rotor core (200). The isolation strip (150) is disposed between two adjacent core segments and extends radially along the rotor core (200), forming a radial ventilation channel (28) between two adjacent core segments.

7. The rotor core as described in claim 6, characterized in that, The rotor core (200) also includes an axial air duct (260), which extends approximately along the axial direction of the rotor core (200) and is connected to the radial ventilation duct (28).

8. A rotor, characterized in that, The rotor includes a shaft and a rotor core (200) as described in any one of claims 2-7, wherein the shaft and the rotor core (200) are assembled together by a thermoforming process.

9. The rotor as claimed in claim 8, characterized in that, The rotor also includes a plurality of magnets (320), a portion of which is inserted into the first mounting groove (232) via the first pressure plate groove (211), and another portion is inserted into the second mounting groove (233) via the second pressure plate groove (221).

10. A method for manufacturing a rotor, characterized in that, The manufacturing method includes: Assemble the rotor core (200) as described in any one of claims 2-7; The rotating shaft (110) and the rotor core (200) are connected together by a heat fitting process; Multiple magnets (320) are respectively installed into the first mounting slot (232) and the second mounting slot (233) through the first pressure plate slot (211) and the second pressure plate slot (221).

11. A magnet, characterized in that, For installation in a rotor core (200), the magnet includes a magnet body and a mounting portion disposed on the magnet body. The mounting portion is disposed at both ends of the magnet body along the circumferential direction of the rotor core. The mounting portion is recessed relative to the magnet body on two opposite sides of the rotor core in the axial direction, and / or, the mounting portion is recessed relative to the magnet body on two opposite sides of the rotor core in the radial direction.

12. A magnetic pole module, characterized in that, For installation in the rotor core (200) of an electric motor, the magnetic pole module (300) includes: The positioning element (310) extends a predetermined length along the axial direction of the rotor core (200); The magnet assembly includes at least two magnets (320), which are distributed along the axial direction of the rotor core (200) and connected to the positioning member (310) respectively, so that the at least two magnets (320) can be inserted into the rotor core (200) as a whole.

13. The magnetic pole module according to claim 12, characterized in that, At least two magnets (320) are spaced apart along the axial direction of the rotor core (200) to form a ventilation gap (330) between two adjacent magnets (320).

14. The magnetic pole module according to claim 13, characterized in that, The magnetic pole module (300) further includes a first limiting block (34), which is disposed between two adjacent magnets (320) along the axial direction (X).

15. The magnetic pole module according to claim 14, characterized in that, At least two first limiting blocks (34) are provided between every two adjacent magnets (320), and the at least two first limiting blocks (34) are spaced apart on the circumferential (Y) direction of the rotor core (200).

16. The magnetic pole module according to claim 15, characterized in that, The magnetic pole module (300) further includes at least two second limiting blocks (35), which are respectively disposed on both sides of the magnet assembly along the axial direction (X) of the rotor core (200). The thickness of the second limiting block (35) is less than the thickness of the first limiting block (34) along the axial direction (X) of the rotor core (200).

17. The magnetic pole module according to claim 16, characterized in that, At least two second limiting blocks (35) are provided on each side of the magnet assembly along the axial direction of the rotor core (200). The at least two second limiting blocks (35) are spaced apart in the circumferential (Y) direction of the rotor core (200). In the axial direction (X) direction of the rotor core (200), the thickness of the first limiting block (34) is equal to twice the thickness of the second limiting block (35).

18. The magnetic pole module according to claim 17, characterized in that, The magnet (320) has positioning parts (321) on both sides of the rotor core (200) along the axial direction (X), and the first limiting block (34) and the second limiting block (35) are respectively disposed in the corresponding positioning parts (321).

19. The magnetic pole module according to any one of claims 12 to 18, characterized in that, The positioning member (310) includes two edging portions (311). On the circumferential (Y) direction of the rotor core (200), the two edging portions (311) are distributed on both sides of the magnet assembly. The edging portions (311) have receiving cavities. The magnets (320) are respectively inserted into the corresponding receiving cavities at both ends of the circumferential (Y) direction.

20. The magnetic pole module according to claim 19, characterized in that, Each of the edging portions (311) includes an end plate (311a), two first plates (311b) and two second plates (311c). The end plate (311a) faces the end face of the magnet assembly in the circumferential direction of the rotor core (200). The first plates (311b) and the second plates (311c) extend from the end plate (311a) toward the side of the magnet assembly. The two first plates (311b) are spaced apart and opposite to each other in the radial direction of the rotor core (200). The two second plates (311c) are spaced apart and opposite to each other in the axial direction of the rotor core (200). The end plate (311a), the two first plates (311b) and the two second plates (311c) enclose the receiving cavity.

21. The magnetic pole module according to any one of claims 12 to 18, characterized in that, The magnet (320) has clearance portions (322) on both sides of the rotor core (200) in the radial direction (Z), and the magnet (320) is connected to the positioning member (310) through the clearance portions (322).

22. The magnetic pole module according to any one of claims 12 to 18, characterized in that, Along the radial (Z) direction of the rotor core (200), the positioning member (310) is partially protruding from the magnet (320).

23. The magnetic pole module according to any one of claims 12 to 18, characterized in that, The positioning member (310) includes two edging portions (311). On the circumferential (Y) direction of the rotor core (200), the two edging portions (311) are distributed on both sides of the magnet group. The edging portions (311) have receiving cavities. Two first limiting blocks (34) are provided between every two adjacent magnets (320). Two second limiting blocks (35) are provided on both sides of the axial direction of each magnet group. The first limiting blocks (34) and the second limiting blocks (35) are both provided on both sides of the magnet (320) on the circumferential direction of the rotor core (200) and located in the receiving cavity.

24. A rotor, characterized in that, The rotor includes a rotor core (200) and a magnetic pole module according to any one of claims 12-23. The rotor core (200) is provided with a magnet mounting groove (220) that matches the magnetic pole module. The magnet mounting groove (220) extends along the axial direction of the rotor core (200), and the magnetic pole module is disposed in the magnet mounting groove (220).

25. The rotor according to claim 24, characterized in that, The rotor core (200) is provided with a radial air duct (210), which runs through the rotor core (200) radially. A ventilation gap (330) is provided between at least two magnets (320), and the ventilation gap (330) communicates with the radial air duct (210).

26. The rotor according to claim 25, characterized in that, Each of the magnet mounting slots (220) is provided with at least two magnetic pole modules. The at least two magnetic pole modules are distributed along the axial direction of the rotor core (200). Two adjacent magnetic pole modules are spaced apart toward each other’s two magnets (320) and form a ventilation gap between the modules. The ventilation gap between the modules is connected to the radial air duct (210).

27. A method for manufacturing a rotor, characterized in that, include: A rotating shaft (110) and a rotor core (200) are provided. The rotor core (200) is provided with a magnet mounting groove (220) which extends along the axial direction (X) of the rotor core (200). The rotor core (200) is heated to a preset temperature, and the rotor core (200) heated to the preset temperature is sleeved on the rotating shaft (110) and cooled so that the rotor core (200) is connected to the rotating shaft (110); A magnetic pole module (300) is provided, the magnetic pole module (300) includes a positioning element (310) and at least two magnets (320), the at least two magnets (320) are distributed along the extension direction of the positioning element (310) and are respectively connected to the positioning element (310); The magnetic pole module (300) is inserted into the magnet mounting slot (220).

28. The method for manufacturing a rotor according to claim 27, characterized in that, The rotor core (200) is provided with a radial air duct (210), which penetrates the rotor core (200) radially. At least two magnets (320) are spaced apart along the axial direction of the rotor core to form a ventilation gap (330) between adjacent magnets (320). The step of inserting the magnetic pole module (300) into the magnet mounting slot (220) further includes: making the radial air duct (210) communicate with the ventilation gap (330).

29. A rotor, characterized in that, The rotor (1) includes: Shaft (110); Multiple rotor segments (120) are sleeved on the rotating shaft (110) along the axial direction of the rotating shaft (110), and each rotor segment (120) includes an iron core segment and a magnet fixed to the iron core segment; A partition strip (150) is disposed between adjacent rotor segments (120) to space the adjacent rotor segments (120) apart from each other along the axial direction to form a radial ventilation channel.

30. The rotor according to claim 29, characterized in that, The rotor (1) includes a plurality of the isolation strips (150), each of the isolation strips (150) extending radially along the rotor segment (120), and the plurality of isolation strips (150) being spaced apart from each other circumferentially along the rotor segment (120).

31. The rotor according to claim 30, characterized in that, At least a portion of the plurality of said isolation strips (150) extends to cover at least a portion of said magnet.

32. The rotor according to claim 30, characterized in that, The isolation strip (150) includes a separation body (151), a first locking part (152) disposed on a first side of the separation body (151), and a second locking part (153) disposed on a second side of the separation body (151) opposite to the first side. The first locking part (152) is fixed to the core segment of one of the adjacent rotor segments (120), and the second locking part (153) is fixed to the core segment of the other adjacent rotor segment (120).

33. The rotor according to claim 29, characterized in that, The core segments of each rotor segment (120) include a first core segment (121) and a second core segment (122) that are in contact with each other, and the magnets of each rotor segment (120) include a first magnet (121a) fixed to the first core segment (121) and a second magnet (122a) fixed to the second core segment (122).

34. The rotor according to claim 29, characterized in that, The core segment of each rotor segment (120) is a third core segment (123), and the magnet of each rotor segment (120) is a third magnet (123a) fixed to the third core segment (123).

35. The rotor according to claim 29, characterized in that, The rotor section (120) includes a plurality of axial air ducts (260) that penetrate the core section and are spaced apart from each other circumferentially along the rotor section (120).

36. The rotor according to claim 35, characterized in that, The rotor (1) includes a plurality of isolation bars (150), a portion of which extends radially between adjacent axial air ducts (260) in a plurality of axial air ducts (260), and another portion of which extends radially from a radial end of the axial air duct (260) away from the center of the core segment.

37. A method for manufacturing a rotor, characterized in that, The manufacturing method includes: Multiple rotor segments (120) are mounted on the rotating shaft (110), and isolation strips (150) are provided between adjacent rotor segments (120). Each rotor segment (120) includes a core segment and a magnet fixed to the core segment, and the isolation strip (150) spaces adjacent rotor segments (120) apart from each other along the axial direction of the core segment to form a radial ventilation channel.

38. The method for manufacturing a rotor according to claim 37, characterized in that, The steps of mounting multiple rotor segments (120) on the rotating shaft (110) and setting isolation strips (150) between adjacent rotor segments (120) include: The first magnet (121a) is fixed to the first iron core segment (121) to form the first magnetic pole module (M1); The isolation strip (150) and the first core segment (121) are sequentially arranged on the second core segment (122). The isolation strip (150) connects the first core segment (121) and the second core segment (122) to each other. Then, the first magnet (121a) is fixed to the first core segment (121) and the second magnet (122a) is fixed to the second core segment (122) to form the second magnetic pole module (M2). The first magnetic pole module (M1), a plurality of second magnetic pole modules (M2) and the first magnetic pole module (M1) are sequentially mounted on the rotating shaft (110) along the axial direction.

39. The method for manufacturing a rotor according to claim 38, characterized in that, The steps of mounting multiple rotor segments (120) on the rotating shaft (110) and setting isolation strips (150) between adjacent rotor segments (120) include: The third magnet (123a) is fixed to the third iron core segment (123) to form the third magnetic pole module (M3); The third magnetic pole module (M3) and the isolation strip (150) are sequentially mounted on the rotating shaft (110) along the axial direction, and the above steps are repeated.

40. The method for manufacturing a rotor according to claim 38, characterized in that, The steps of mounting multiple rotor segments (120) on the rotating shaft (110) and setting isolation strips (150) between adjacent rotor segments (120) include: The third iron core segment (123), the third magnet (123a) and the isolation strip (150) are sequentially mounted on the rotating shaft (110) and the above steps are repeated.

41. An electric motor, characterized in that, The motor includes a rotor core according to any one of claims 1 to 7, or a rotor according to claim 8 or 9, or a magnet according to claim 11, or a magnetic pole module according to any one of claims 12 to 23, or a rotor according to any one of claims 24 to 26, or a rotor (1) according to any one of claims 29 to 36.

42. A wind turbine generator set, characterized in that, The wind turbine generator set includes the motor according to claim 41, wherein the motor is a generator.

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