Rotor core, magnetic pole module, rotor assembly, motor and wind turbine generator set

Abstract

The present disclosure provides a rotor core, a magnetic pole module, a rotor assembly, an electric machine and a wind turbine generator set, the rotor core is provided with a mounting slot for mounting the magnetic pole module, the mounting slot extends along the axial direction of the rotor core, an inner side wall of the mounting slot is formed with a core matching part, the core matching part includes a protruding part protruding into the mounting slot and / or a notch part recessed from the inner side wall of the mounting slot, so that after the rotor core and the rotating shaft are assembled, it is possible to insert the magnetic pole module into the mounting slot, which can effectively avoid the influence of high temperature on the performance of the magnetic pole module during the heating process of the rotor core.

Description

Technical Field

[0001] This disclosure pertains to the field of wind power generation technology, and particularly relates to a rotor core, magnetic pole module, rotor assembly, motor, and wind turbine generator set. Background Technology

[0002] The rotor of a permanent magnet motor typically includes a shaft, a rotor core, and permanent magnets connected to the rotor core. Currently, permanent magnet motors usually connect the rotor core, on which the permanent magnets are mounted, to the shaft using a heat-fitting process. During this heat-fitting process, the permanent magnets are prone to high-temperature demagnetization, which affects the normal operation of the permanent magnet motor. Utility Model Content

[0003] The main purpose of this disclosure is to provide a rotor core, magnetic pole module, rotor assembly, motor, and wind turbine generator set that can effectively prevent the magnet from overheating and improve the reliability of the magnet.

[0004] To achieve the above objectives, this disclosure provides the following technical solution: According to one aspect of this disclosure, a rotor core is provided, wherein a mounting groove is provided on the rotor core for mounting a magnetic pole module, the magnetic pole module is provided with a magnetic pole mating portion, the mounting groove extends along the axial direction of the rotor core, and a core mating portion is formed on the inner sidewall of the mounting groove, the core mating portion including a protrusion protruding into the mounting groove and / or a notch recessed from the inner sidewall of the mounting groove.

[0005] According to an exemplary embodiment of this disclosure, the magnetic pole module is provided with a magnetic pole mating portion, the iron core mating portion includes one of the notch portion and the protrusion portion, and the magnetic pole mating portion includes the other of the notch portion and the protrusion portion. When the magnetic pole module is disposed in the mounting groove, the protrusion portion is inserted into the notch portion.

[0006] According to an exemplary embodiment of the present disclosure, the mounting groove has a first sidewall and a second sidewall disposed opposite to each other, and the core mating portion is formed on at least one of the first sidewall and the second sidewall.

[0007] According to an exemplary embodiment of this disclosure, the protrusion extends toward the notch by a dimension smaller than the depth of the notch.

[0008] According to an exemplary embodiment of the present disclosure, the first sidewall and the second sidewall are disposed on opposite sides of the mounting groove in the radial direction of the rotor core, and the core mating portion is centrally disposed on the first sidewall and the second sidewall in the circumferential direction of the rotor core.

[0009] According to another aspect of this disclosure, a magnetic pole module is provided, which is suitable for rotor cores. The magnetic pole module is provided with a magnetic pole mating part, which includes a notch formed by a recess in the outer peripheral wall of the magnetic pole module and / or a protrusion formed by an outward protrusion from the outer peripheral wall of the magnetic pole module.

[0010] According to an exemplary embodiment of this disclosure, the rotor core is provided with a core mating portion and a mounting groove for mounting the magnetic pole module. The magnetic pole mating portion includes one of the notch portion and the protrusion portion, and the core mating portion includes the other of the notch portion and the protrusion portion. When the magnetic pole module is disposed in the mounting groove, the protrusion portion is inserted into the notch portion.

[0011] According to an exemplary embodiment of the present disclosure, the magnetic pole module includes a magnet assembly and at least two positioning members, each of the positioning members extending a predetermined length along the axial direction of the rotor core, and at least two of the positioning members being circumferentially spaced along the rotor core. The positioning members are arranged to protrude or be recessed relative to the outer peripheral wall of the magnet assembly to form the magnetic pole mating portion on the outer side of the magnet assembly and between two adjacent positioning members.

[0012] According to an exemplary embodiment of this disclosure, there are two positioning members, and the two positioning members are respectively disposed at both ends of the magnet assembly in the circumferential direction of the rotor core.

[0013] According to an exemplary embodiment of the present disclosure, each of the positioning members includes a positioning member body, the positioning member body including a first plate and a second plate, the first plate and the second plate being disposed opposite each other on opposite sides of the magnet assembly, at least one of the first plate and the second plate being convex or recessed relative to the outer peripheral wall of the magnet assembly, the magnetic pole mating portion being formed between two adjacent first plates, and / or, the magnetic pole mating portion being formed between two adjacent second plates.

[0014] According to an exemplary embodiment of this disclosure, the magnet assembly has opposing first and second sides, each positioning member includes a positioning member body, the positioning member body including a first plate connected to the first side of the magnet assembly, the first plate being convex or recessed relative to the outer peripheral wall of the magnet assembly, and the magnetic pole mating portion being formed between two adjacent first plates; or, each positioning member includes a positioning member body, the positioning member body including a second plate connected to the second side of the magnet assembly, the second plate being convex or recessed relative to the outer peripheral wall of the magnet assembly, and the magnetic pole mating portion being formed between two adjacent second plates.

[0015] According to an exemplary embodiment of this disclosure, the protrusion extends toward the notch by a dimension smaller than the depth of the notch.

[0016] According to an exemplary embodiment of the present disclosure, the magnet assembly includes at least two magnets, each magnet being connected to the positioning member, and the at least two magnets being spaced apart along the axial direction of the rotor core to form a ventilation gap between adjacent magnets.

[0017] According to an exemplary embodiment of this disclosure, the magnet assembly further includes at least two limiting blocks. In the axial direction of the rotor core, the limiting blocks are supported between two adjacent magnets. In the circumferential direction of the rotor core, at least two limiting blocks are spaced apart so that the ventilation gap is located between two adjacent limiting blocks.

[0018] According to another aspect of this disclosure, a magnetic pole module is provided, suitable for a rotor core having a mounting groove extending along its axial direction. The magnetic pole module is for insertion into the mounting groove. The magnetic pole module includes a magnet assembly and a positioning member. The magnet assembly includes at least two magnets spaced apart along the axial direction of the rotor core, with a ventilation gap formed between adjacent magnets. The positioning member includes a positioning member body and a flange protrusion. In the radial direction of the rotor core, the positioning member body is connected to at least one side of the magnet assembly. The flange protrusion extends from the positioning member body along the circumferential direction of the rotor core. In the axial direction of the rotor core, the flange protrusion is at least partially located in the ventilation gap.

[0019] According to an exemplary embodiment of this disclosure, the magnet assembly has a first side and a second side opposite to each other, the positioning member body includes a first plate connected to the first side of the magnet assembly, the retaining edge protrusion includes a first protrusion connected to the first plate; and / or, the positioning member body includes a second plate connected to the second side of the magnet assembly, the retaining edge protrusion includes a second protrusion connected to the second plate.

[0020] According to an exemplary embodiment of the present disclosure, in the radial direction of the rotor core, the positioning member body includes a first plate and a second plate disposed opposite to each other, and the flange protrusion includes a first protrusion and a second protrusion, the first protrusion being connected to the first plate and the second protrusion being connected to the second plate, and the first protrusion and the second protrusion being disposed opposite to each other.

[0021] According to an exemplary embodiment of the present disclosure, the first plate and the second plate are arranged opposite each other in the radial direction of the rotor core, and the distance between the first protrusion and the second protrusion in the radial direction of the rotor core is greater than the distance between the first plate and the second plate.

[0022] According to another aspect of this disclosure, a rotor assembly is provided, the rotor assembly including a rotor core as described above and a magnetic pole module as described above, the magnetic pole mating portion including one of a notch portion and a protrusion portion, the core mating portion including the other of the notch portion and the protrusion portion, wherein when the magnetic pole module is disposed in the mounting groove, the protrusion portion is inserted into the notch portion; or, the rotor assembly includes a magnetic pole module as described above.

[0023] According to another aspect of this disclosure, an electric motor is provided, the electric motor including the rotor assembly as described above.

[0024] According to another aspect of this disclosure, a wind turbine generator set is provided, the wind turbine generator set including a motor as described above, the motor being a generator.

[0025] The rotor core, magnetic pole module, rotor assembly, motor, and wind turbine generator provided in this disclosure have at least the following beneficial effects: Since the rotor core is provided with a mounting slot, which is set to extend along the axial direction of the rotor core, the magnetic pole module can be inserted into the mounting slot along the axial direction of the rotor core. This also makes it possible to insert the magnetic pole module into the mounting slot after the rotor core and shaft are assembled, which can effectively avoid the magnetic pole module being heated to a high temperature during the rotor core heating process and thus affecting its performance. Attached Figure Description

[0026] The above and / or other objects and advantages of this disclosure will become clearer from the following description of embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 A structural diagram of a rotor assembly provided for an exemplary embodiment of this disclosure.

[0027] Figure 2 for Figure 1 A magnified view of the magnetic pole mounting position.

[0028] Figure 3 for Figure 2 A partially enlarged view of the magnetic pole mounting position in the image, showing the magnetic pole module installed.

[0029] Figure 4 A structural diagram of a magnetic pole module provided for an exemplary embodiment of this disclosure.

[0030] Figure 5 for Figure 4 A partial longitudinal sectional view of the magnetic pole module.

[0031] Figure 6 for Figure 4 The structural diagram of the positioning component.

[0032] Explanation of reference numerals in the attached figures: 10. Rotor assembly; 100. Magnetic pole module; 110. Magnet assembly; 111. Magnet; 112. Limiting block; 120. Positioning component; 121. Positioning component body; 122. Edge retaining protrusion; 1211, First board; 1212, Second board; 1213. End plate; 1214. Bottom sealing; 1221. First protrusion; 1222. Second protrusion; 200. Rotor core; 210. Mounting slot; 220. Protrusion; 240. Radial air duct; 250, Axial air duct; 300, Rotary shaft. Detailed Implementation

[0033] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be construed that the embodiments of this disclosure are limited to those described herein. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted.

[0034] According to one aspect of this disclosure, an electric motor is provided, comprising a motor and a generator. As an example, the generator may be applicable to a wind turbine generator set, but is not limited thereto.

[0035] This embodiment will use the motor as a generator as an example for explanation.

[0036] According to another aspect of this disclosure, a wind turbine generator set is provided, which includes a tower, a nacelle connected to the tower, an impeller rotatably connected to the nacelle relative to the nacelle, and a generator. The impeller can be connected to the generator shaft via a main shaft so that the rotation of the impeller drives the generator to generate electricity.

[0037] In this embodiment, the generator may include a stator and a rotor assembly 10. The rotor assembly 10 may be sleeved inside the stator and may rotate relative to the stator about a rotating shaft.

[0038] Currently, the rotor assembly 10 may include a magnet 111, a rotor core 200, and a shaft 300. The rotor core 200 is fitted onto the shaft 300 and kept in a fixed relative position to the shaft 300. During the assembly of the rotor assembly 10, the rotor core 200 is usually connected to the magnet 111 first. For example, after a magnet 111 is installed on each rotor lamination, multiple rotor laminations are stacked and connected together to form a rotor core 200 with magnets 111. Finally, the rotor core 200 and the shaft 300 are connected together.

[0039] Specifically, during the assembly of the rotor core 200 and the shaft 300, the rotor core 200 is usually heated to a high temperature before being fitted onto the shaft 300. Utilizing the principle of thermal expansion and contraction, the rotor core 200 is firmly connected to the shaft 300. The process of assembling the heated rotor core 200 and the shaft 300 is called the heat fitting process of the shaft 300 and the rotor core 200.

[0040] During the heat fitting process between the shaft 300 and the rotor core 200, the rotor core 200 is usually heated together with the magnet 111, which can easily cause the magnet 111 to demagnetize at high temperature, affecting the performance of the motor.

[0041] Reference Figure 1 According to another aspect of this disclosure, a rotor assembly 10 is provided. The rotor assembly 10 may include a magnetic pole module 100, a rotor core 200, and a rotating shaft 300. The rotor core 200 is provided with a mounting groove 210 extending axially along the rotor core 200. The inner sidewall of the mounting groove 210 forms a core mating portion. The magnetic pole module 100 is provided with a magnetic pole mating portion. The magnetic pole module 100 can be inserted into the mounting groove 210. The magnetic pole mating portion includes one of a notch and a protrusion 220. The core mating portion includes the other of a notch and a protrusion 220. When the magnetic pole module 100 is installed in the mounting groove 210, the protrusion 220 can be inserted into the notch.

[0042] This disclosure uses the magnetic pole mating portion as a notch and the iron core mating portion as a protrusion 220 corresponding to the notch, with the protrusion 220 protruding from the inner wall of the mounting groove 210 into the mounting groove 210 as an example, but it is not limited thereto. Depending on the need, the magnetic pole mating portion can be a protrusion, and the iron core mating portion can be a notch corresponding to the protrusion. In this case, the notch can be recessed from the inner wall of the mounting groove 210, but it is not limited thereto.

[0043] The rotor assembly 10 provided in this embodiment has a mounting groove 210 on the rotor core 200, which is set to extend along the axial direction of the rotor core 200. This allows the magnetic pole module 100 to be inserted into the mounting groove 210 along the axial direction of the rotor core 200. This configuration makes it possible to insert the magnetic pole module 100 into the mounting groove 210 after the rotor core 200 and the shaft 300 are assembled. This can effectively prevent the magnetic pole module 100 from being heated to a high temperature during the heating process of the rotor core 200, which would affect its performance.

[0044] Specifically, before installing the magnetic pole module 100, the rotor core 200 can be connected to the shaft 300 by a heat fitting process. Since the magnetic pole module 100 is not installed on the rotor core 200 during the assembly of the rotor core 200 and the shaft 300, the magnetic pole module 100 is effectively prevented from being heated during the heating process of the rotor core 200, thus avoiding the demagnetization of the magnetic pole module 100 at high temperature.

[0045] As an example, the rotor core 200 and the shaft 300 can be fixed in relative position by key connection. Alternatively, the rotor core 200 and the shaft can be connected by interference fit or by high-temperature heat fitting. The assembly of the rotor core 200 and the shaft 300 is a known process in the art and will not be described in detail here.

[0046] Reference Figure 2 and Figure 3 According to an exemplary embodiment of the present disclosure, in order to install the magnetic pole module 100, the rotor core 200 is provided with a plurality of magnetic pole mounting positions. The plurality of magnetic pole mounting positions are spaced apart along the circumference of the rotor core 200. Each magnetic pole mounting position includes at least two mounting slots 210. Along the circumference of the rotor core 200, at least two mounting slots 210 may be spaced apart, but are not limited thereto.

[0047] This embodiment is illustrated using the example of three mounting slots 210 for each magnetic pole mounting position, but it is not limited to this.

[0048] To improve the on-site assembly efficiency of the rotor assembly, multiple magnets 111 can be pre-assembled into modules, which facilitates improved assembly efficiency on-site. In this embodiment, multiple magnets 111 can be pre-formed into a magnetic pole module 100. The magnetic pole module 100 is provided with a magnetic pole mating part extending axially along the rotor core 200. When the magnetic pole module 100 is inserted into the mounting slot 210, the core mating part of the mounting slot 210 is inserted into the magnetic pole mating part of the magnetic pole module 100.

[0049] According to an exemplary embodiment of this disclosure, the specific structure of the magnetic pole module 100 will be described in detail below.

[0050] According to another aspect of this disclosure, a magnetic pole module 100 may include a positioning element 120 and a magnet assembly 110. The magnet assembly 110 may include at least two magnets 111, which are distributed along the axial direction of the rotor core 200 and respectively connected to the positioning element 120, such that the at least two magnets 111 are connected together through the positioning element 120 and can be inserted as a whole into the mounting slot 210. With this configuration, the magnetic pole module 100 can be pre-assembled and then inserted into the mounting slot 210 of the rotor core 200 at the assembly site of the rotor assembly 10, thereby improving the assembly efficiency of the magnets 111 and thus improving the assembly efficiency of the rotor assembly 10.

[0051] Reference Figures 2 to 6 Each magnetic pole module 100 may include at least two positioning elements 120, which are spaced apart circumferentially along the rotor core 200. Each positioning element 120 is provided with a mounting cavity for mounting the magnet assembly 110.

[0052] Each positioning element 120 extends a predetermined length along the axial direction of the rotor core 200. Each magnet 111 of the magnet assembly 110 is disposed within the mounting cavity of the positioning element 120 for connection with the positioning element 120. In this embodiment, each magnet 111 is generally rectangular in shape. In the radial direction of the rotor core 200, a pair of sidewalls of each magnet 111 respectively abut against the cavity wall of the mounting cavity, such that the positioning element 120 protrudes relative to the outer peripheral wall of the magnet assembly 110, forming a notch between the outer side of the magnet assembly 110 and two adjacent positioning elements 120. This notch matches the protrusion 220 of the mounting groove 210. When the magnetic pole module 100 is disposed within the mounting groove 210, the protrusion 220 is inserted into the notch. This arrangement effectively avoids excessive air gap between the rotor core 200 and the magnet 111, thereby preventing magnetic flux leakage and improving the utilization rate of the magnetic field.

[0053] The above embodiments are illustrated with a notch formed in the radial direction of the rotor core 200. For example, but not limited to, the notch is formed on at least one of the radially opposite side walls of the magnetic pole module 100 of the rotor core 200. However, this is not a limitation. As needed, the notch can also be formed in the circumferential direction of the rotor core 200. For example, but not limited to, the notch is formed on at least one of the circumferentially opposite side walls of the magnetic pole module 100 of the rotor core 200. Furthermore, the above embodiments are illustrated with an example of a notch formed on the magnetic pole module 100 and a corresponding protrusion 220 formed on the rotor core 200. However, this is not a limitation. As needed, a notch can be formed on the rotor core 200, and a corresponding protrusion 220 can be formed on the magnetic pole module 100, which is also within the scope of this disclosure.

[0054] Referring again to the accompanying drawings, as an example, the positioning member 120 may include a positioning member body 121, which includes a first plate 1211 and a second plate 1212. In the radial direction of the rotor core 200, the first plate 1211 and the second plate 1212 are disposed opposite to each other on both sides of the magnet assembly 110, and at least one of the first plate 1211 and the second plate 1212 protrudes relative to the outer peripheral wall of the magnet assembly 110. A notch is formed between two adjacent first plates 1211, and / or, a notch is formed between two adjacent second plates 1212.

[0055] The above embodiment is illustrated by taking the first plate 1211 and the second plate 1212 as being disposed on both sides of the rotor core 200 of the magnet assembly 110 in the radial direction as an example, but it is not limited thereto. The first plate 1211 and the second plate 1212 may be disposed on both sides of the rotor core 200 of the magnet assembly 110 in the circumferential direction as needed, but it is not limited thereto.

[0056] This embodiment uses the positioning component body 121 as an example, which includes a first plate 1211 and a second plate 1212 that are opposite to each other and spaced apart, but it is not limited thereto. As needed, the positioning component body 121 may include only the first plate 1211 or the second plate 1212, as long as it can connect multiple magnets 111 together to form a magnetic pole module 100.

[0057] The above embodiment is illustrated by taking the first plate 1211 and the second plate 1212 as being arranged opposite each other in the radial direction of the rotor core 200, but this is not a limitation. As needed, the first plate 1211 and the second plate 1212 can be arranged to be staggered along the circumference of the rotor core 200, as long as the first plate 1211 is connected to one side of the magnet assembly 110 in the radial direction of the rotor core 200, and the second plate 1212 is connected to the other side of the magnet assembly 110 in the radial direction of the rotor core 200.

[0058] The number of magnetic pole modules 100 set in each mounting slot 210 can be one, two or more. When there are two or more, the two or more magnetic pole modules 100 can be distributed along the axial direction of the rotor core 200. Two adjacent magnetic pole modules 100 located in the same mounting slot 210 can be set together or spaced apart.

[0059] This embodiment uses the example of two adjacent magnetic pole modules 100 being attached together in the same mounting slot 210 for illustration.

[0060] In this embodiment, the positioning member 120 of the magnetic pole module 100 can protrude from both sides of the magnet assembly 110 in the axial direction of the rotor core 200. When the magnetic pole module 100 is installed in the mounting groove 210, the positioning members 120 of two adjacent magnetic pole modules 100 can be fitted together. The two magnets 111 facing each other in two adjacent magnetic pole modules 100 located in the same mounting groove 210 are spaced apart and form an inter-module ventilation gap. This inter-module ventilation gap can communicate with the ventilation channel of the rotor core 200 (described below), but is not limited thereto.

[0061] As an example, continue to refer to Figure 5 The positioning component body 121 also includes an end plate 1213, which is connected between the first plate 1211 and the second plate 1212. Along the axial direction of the rotor core 200, the end plate 1213 is disposed at the end of the first plate 1211, but is not limited thereto. In the axial direction of the rotor core 200, the two end plates 1213 are respectively protruding relative to the outer peripheral wall of the magnet assembly 110, but are not limited thereto.

[0062] When two adjacent magnetic pole modules 100 located in the same mounting groove 210 are in contact with each other, the end plates 1213 of the positioning body 121 of the two adjacent magnetic pole modules 100 are in contact with each other, so that the two magnets 111 located at the ends of the two adjacent magnetic pole modules 100 can be spaced apart to form an inter-module ventilation gap between the two adjacent magnets 111.

[0063] The above embodiment is illustrated by taking the positioning member 120 protruding in the axial direction of the rotor core 200 relative to the magnet assembly 110 as an example, but it is not limited thereto, as long as the two magnets 111 of the two adjacent magnetic pole modules 100 are spaced apart from each other.

[0064] Two adjacent magnets 111 located in the same magnetic pole module 100 are spaced apart to form a ventilation gap between the two adjacent magnets 111. Each magnetic pole module 100 may include at least two magnets 111, so each magnetic pole module 100 may have at least one ventilation gap.

[0065] As an example, the height of the ventilation gap between modules and the height of the ventilation gap within the magnetic pole module 100 can be the same along the axial direction of the rotor core 200, but this is not a limitation. This embodiment is illustrated using the example of the ventilation gap between modules being the same.

[0066] In this embodiment, the inter-module ventilation gap and ventilation gap are respectively connected to the ventilation channel of the rotor core 200 to improve the heat dissipation efficiency of the rotor assembly 10. In order to clearly describe the ventilation channel of the rotor core 200, the specific structure of the rotor core 200 will be described in detail.

[0067] return Figure 1 To improve the heat dissipation efficiency of the rotor assembly, according to an exemplary embodiment of this disclosure, the rotor core 200 is provided with ventilation channels. As an example, the ventilation channels may include interconnected radial air channels 240 and axial air channels 250. The axial air channels 250 may extend axially along the rotor core 200. Optionally, the number of axial air channels 250 provided on the rotor core 200 may be multiple, and the multiple axial air channels 250 are spaced apart circumferentially along the rotor core 200, but this is not a limitation. The radial air channels 240 may extend radially along the rotor core 200. Optionally, the radial air channels 240 may be provided radially through the rotor core 200, but this is not a limitation. Optionally, the multiple radial air channels 240 are spaced apart axially along the rotor core 200. For example, but not limited to, the spacing between two adjacent radial air channels 240 may be equal to ensure uniform cooling.

[0068] As an example, the rotor core 200 can be formed by stacking rotor laminations along the axial direction of the rotor core 200, with adjacent rotor laminations spaced apart to form a ventilation channel between them. Since this ventilation channel extends approximately radially along the rotor core 200, it can be called a radial ventilation channel 240. In addition, the rotor core 200 also has ventilation channels extending axially, for example, but not limited to, each rotor lamination having through holes (e.g., weight-reduction holes). The through holes of different rotor laminations are aligned axially along the rotor core 200 to form a ventilation channel. Since this ventilation channel extends axially along the rotor core 200, it can be called an axial ventilation channel 250. In this embodiment, the radial ventilation channel 240 and the axial ventilation channel 250 can be connected for heat dissipation of the rotor core 200.

[0069] According to an exemplary embodiment of this disclosure, when the magnetic pole module 100 is installed in the mounting slot 210, the ventilation gap between two adjacent magnets 111 of each magnetic pole module 100 can be connected to the radial air duct 240 of the rotor core 200, and the inter-module ventilation gap between two adjacent magnetic pole modules 100 can be connected to the radial air duct 240 of the rotor core 200. This can prevent the magnets 111 from blocking the ventilation duct and ensure the heat dissipation efficiency of the rotor assembly 10, but is not limited thereto.

[0070] Continue to refer to Figure 4 and Figure 5In this embodiment, the magnet assembly 110 may further include a limiting block 112. In each magnet assembly 110, the limiting block 112 is disposed between two adjacent magnets 111 along the axial direction of the rotor core 200, and the opposite sides of the limiting block 112 are respectively fitted to the two adjacent magnets 111 to provide support for the two adjacent magnets 111. In the radial direction of the rotor core 200, the projection of the positioning member 120 in the radial direction of the rotor core 200 covers the limiting block 112, such that the limiting block 112 is accommodated in the mounting cavity of the positioning member 120, but this is not a limitation.

[0071] In this embodiment, by setting a limiting block 112 and reliably supporting the limiting block 112 between two adjacent magnets 111, the relative positions of the two adjacent magnets 111 are kept stable, ensuring the stability of the ventilation gap value, thereby improving the reliability of the magnetic pole module 100.

[0072] As an example, in the axial direction of the rotor core 200, the thickness of the limiting block 112 can be twice the thickness of the end plate 1213. When the magnetic pole module 100 is installed in the mounting groove 210, the distance between two adjacent magnets 111 of two adjacent magnetic pole modules 100 is equal to the distance between two adjacent magnets 111 in the same magnetic pole module 100, so that the magnets 111 on the rotor assembly 10 are evenly spaced in the axial direction of the rotor core 200, but this is not a limitation.

[0073] The above embodiment is illustrated by taking the magnetic pole module 100 having a notch portion, which is provided on at least one side of the magnetic pole module 100 along the radial direction of the rotor core 200 as an example, but is not limited thereto.

[0074] Continue to refer to Figures 4 to 6 To further improve the reliability of the magnetic pole module 100 and prevent the limiting block 112 from accidentally sliding or dislodging during the use of the rotor assembly 10, the positioning member 120 also includes a flange protrusion 122. The flange protrusion 122 extends from the positioning member body 121 along the circumference of the rotor core 200. In the axial direction of the rotor core 200, the flange protrusion 122 is at least partially located in the ventilation gap to protect the limiting block 112 and prevent the limiting block 112 from accidentally dislodging during the use of the rotor assembly 10.

[0075] In this embodiment, each positioning member 120 may be provided with multiple flange protrusions 122. These flange protrusions 122 are spaced apart along the axial direction of the rotor core 200, such that they are located between two adjacent magnets 111. In the circumferential direction of the rotor core 200, the flange protrusions 122 extend protruding from the positioning member body 121 to prevent the limiting block 112 from accidentally dislodging, thereby further improving the reliability of the magnetic pole module 100.

[0076] Reference Figure 5 The flange protrusion 122 includes a first protrusion 1221 and a second protrusion 1222. The first protrusion 1221 is connected to the first plate 1211, and the second protrusion 1222 is connected to the second plate 1212. The first protrusion 1221 and the second protrusion 1222 are arranged opposite to each other in the radial direction of the rotor core 200.

[0077] As an example, in the radial direction of the rotor core 200, the distance between the first protrusion 1221 and the second protrusion 1222 is greater than the distance between the first plate 1211 and the second plate 1212, so as to avoid friction and scratching between the limiting block 112 and the positioning member 120 during the process of inserting the limiting block 112 into the mounting cavity of the positioning member 120, thereby improving the service life of the limiting block 112.

[0078] This embodiment is illustrated by taking the positioning component body 121, which includes a first plate 1211 and a second plate 1212 arranged radially opposite to each other along the rotor core 200, and the flange protrusion 122, which includes a first protrusion 1221 and a second protrusion 1222 arranged radially opposite to each other along the rotor core 200, as an example, but it is not limited thereto. Depending on the needs, the positioning component 120 can be configured such that: the first plate 1211 has a first protrusion 1221, while the second plate 1212 does not have a second protrusion 1222; or, conversely, the first plate 1211 does not have a first protrusion 1221, while the second plate 1212 has a second protrusion 1222; or the first plate 1211 and the second plate 1212 each have a first protrusion 1221 and a second protrusion 1222, but the first protrusion 1221 and the second protrusion 1222 are staggered along the axial direction of the rotor core 200, all of which are within the scope of this disclosure.

[0079] This embodiment is illustrated by taking the example of the first plate 1211 and the second plate 1212 being disposed on opposite radial sides of the magnet assembly 110 on the rotor core 200. Correspondingly, the first protrusion 1221 and the second protrusion 1222 are disposed opposite each other in the radial direction of the rotor core 200. However, this is not a limitation. As needed, when the first plate 1211 and the second plate 1212 are disposed on opposite circumferential sides of the magnet assembly 110 on the rotor core 200, the first protrusion 1221 and the second protrusion 1222 are disposed opposite each other in the circumferential direction of the rotor core 200.

[0080] To facilitate accurate positioning of the positioning component 120, the positioning component body 121 in this embodiment also includes a bottom cover 1214. The bottom cover 1214 is connected between the first plate 1211 and the second plate 1212, and the bottom cover 1214 is disposed on both sides of the magnet assembly 110 along the circumference of the rotor core 200. The side of the bottom cover 1214 facing the magnet assembly 110 can fit against the magnet assembly 110, but is not limited thereto.

[0081] In fact, referring to Figure 6 The positioning member 120 is formed as a shell structure with an opening. In the radial direction of the rotor core 200, the first plate 1211 and the second plate 1212 are arranged opposite to each other and spaced apart. In the axial direction of the rotor core 200, the two end plates 1213 are arranged opposite to each other and spaced apart. The first plate 1211, the second plate 1212, and the two end plates 1213 enclose a mounting cavity, which forms a surrounding edge. The mounting cavity communicates with the outside through the opening. As an example, the magnet assembly 110 in this embodiment can be inserted into the mounting cavity through the opening, but this is not a limitation.

[0082] In the circumferential direction of the rotor core 200, the first protrusion 1221 is disposed on one side of the first plate 1211, and the bottom cover 1214 is disposed on the other side of the first plate 1211, that is, the bottom cover 1214 is disposed on the side of the first plate 1211 opposite to the first protrusion 1221, but not limited thereto.

[0083] According to one embodiment of the present disclosure, the positioning member 120 can be formed by stamping, so that its surrounding edges can be closed, that is, the first plate 1211, the second plate 1212 and the two end plates 1213 are connected in sequence. Of course, this is an optional implementation method. The positioning member 120 can also be formed by bending. If it is bent, the surrounding edges can be stacked.

[0084] This embodiment uses a magnetic pole module 100 with a notch, and the magnetic pole module 100 includes a positioning member 120, which includes a positioning member body 121 and a retaining edge protrusion 122, with the retaining edge protrusion 122 extending circumferentially from the positioning member body 121 along the rotor core 200 as an example for illustration, but it is not limited thereto. According to the magnetic pole module 100 provided in this embodiment, the notch and the retaining edge protrusion 122 are separate and independent technical features. As needed, the magnetic pole module 100 can be configured such that the positioning member 120 includes the retaining edge protrusion 122 to improve the reliability of the limiting block 112 and prevent the limiting block 112 from detaching from the magnetic pole module 100, without requiring the magnetic pole module 100 to have a notch.

[0085] Optionally, in one embodiment of this disclosure, the rotor assembly 10 and the positioning member 120 may be made of non-magnetic stainless steel or other non-magnetic structures, such as plastic.

[0086] As an example, in this embodiment, each magnetic pole module 100 may include two, three, or more magnets 111. Each magnet 111 may be fixedly connected to the positioning member 120 by means of adhesive bonding or by a snap-fit ​​connection, so that the positioning member 120 fixes the distance between two adjacent magnets 111, forming a ventilation gap. The connection method between the limiting block 112 and the positioning member 120 can refer to the connection method between the magnet 111 and the positioning member 120, and will not be described again here.

[0087] The magnet 111 provided in one embodiment of this disclosure can be manufactured or sold as a standalone product. Of course, it can also be used in the magnetic pole module 100 and serve as a component of the magnetic pole module 100. Alternatively, it can be used in the rotor assembly 10 and serve as a component of the rotor assembly 10.

[0088] In this embodiment, the radial air duct 240 of the rotor core 200 and the ventilation gap with the magnetic pole module 100 can be arranged opposite to each other in the radial direction of the rotor core 200, or they can be partially offset, as long as airflow communication between them is achieved, all of which are within the protection scope of this disclosure. This embodiment uses the example of the radial air duct 240 and the ventilation gap being arranged opposite to each other in the radial direction of the rotor core 200 for illustration, but it is not limited thereto.

[0089] The number of radial air ducts 240 and ventilation gaps can be equal, or one can be less than the other. This embodiment is illustrated by taking the example that the number of radial air ducts 240 and ventilation gaps are equal and arranged in a one-to-one ratio in the radial direction of the rotor core 200, but it is not limited thereto.

[0090] In this disclosure, the magnetic pole module 100 can be manufactured or sold as an independent product, or it can be used in the rotor assembly 10 and as a component of the rotor assembly 10.

[0091] return Figure 2 In the radial direction of the rotor core 200, the mounting groove 210 has a first sidewall and a second sidewall disposed opposite to each other, and a protrusion 220 is formed on at least one of the first sidewall and the second sidewall. As an example, the protrusion 220 includes a first protrusion 221 and a second protrusion 222, the first protrusion 221 being formed on the first sidewall and the second protrusion 222 being formed on the second sidewall, and the first protrusion 221 and the second protrusion 222 being disposed opposite to each other and capable of protruding into the mounting groove 210.

[0092] The above embodiment is described using the example of the protrusion 220 being formed on the first sidewall and the second sidewall, but it is not limited thereto. As needed, the protrusion 220 may also be formed only on the first sidewall and the second sidewall. It is mainly provided in accordance with the notch of the magnetic pole module 100. When the notch is formed only on one side of the magnetic pole module 100 along the radial direction of the rotor core 200, the protrusion 220 is formed only on one side wall of the mounting groove 210. When the magnetic pole module 100 has notches formed on both radial sides of the rotor core 200, the protrusion 220 is formed on the sidewalls of the opposite sides of the mounting groove 210.

[0093] The rotor core 200 provided in this embodiment has a mounting groove 210 that matches the magnetic pole module 100. In the radial direction of the rotor core 200, the positioning member 120 of the magnetic pole module 100 protrudes from the outer peripheral wall of the magnet assembly 110. The positioning member 120 can protect the magnet assembly 110. During the process of inserting the magnetic pole module 100 into the mounting groove 210, the magnet assembly 110 is prevented from contacting and rubbing against the groove wall of the mounting groove 210, thereby improving the reliability of the magnet assembly 110.

[0094] When the magnetic pole module 100 is installed in the mounting groove 210, the protrusion 220 can be inserted into the notch of the magnetic pole module 100, reducing the air gap between the magnet assembly 110 and the rotor core 200, thereby improving the magnetic field utilization rate of the magnet assembly 110.

[0095] In order to avoid the protrusion 220 from contacting and rubbing against the magnet assembly 110 during the process of inserting the magnetic pole module 100 into the mounting groove 210, or even scratching the magnet assembly 110, in this embodiment, the dimension of the protrusion 220 extending into the mounting groove 210 in the radial direction of the rotor core 200 is smaller than the depth of the notch of the magnetic pole module 100.

[0096] With this configuration, the magnetic pole module 100 provided in this embodiment has a gap between the positioning member 120 and the groove wall of the mounting groove 210 that is smaller than the gap between the protrusion 220 and the magnet assembly 110. This can effectively prevent the magnet assembly 110 from rubbing and scratching the rotor core 200 during the insertion of the magnetic pole module 100, thereby improving the safety of the magnet assembly 110, but it is not limited thereto.

[0097] This embodiment illustrates an example where each magnetic pole module 100 includes two positioning members 120, and the two positioning members 120 are disposed at both ends of the magnet assembly 110 along the circumferential direction of the rotor core 200. Correspondingly, according to an exemplary embodiment of this disclosure, in the circumferential direction of the rotor core 200, the protrusion 220 is centrally disposed on the first and second side walls, but this is not a limitation. As needed, each magnetic pole module 100 may have more than two positioning members 120, provided that the number and position of the protrusions 220 match the number and position of the positioning members 120.

[0098] In this embodiment, the notch is formed by the first plate 1211 of two adjacent positioning members 120 and the outer peripheral wall of the magnet assembly 110 located between the two first plates 1211. The depth of the notch is the size by which the first plate 1211 protrudes relative to the outer peripheral wall of the magnet assembly 110 located between the two first plates 1211.

[0099] As an example, the protrusion 220 has a first dimension in the radial direction of the rotor core 200, and the positioning member 120 protrudes a second dimension relative to the outer peripheral wall of the magnet assembly 110, the first dimension being smaller than the second dimension. As an example, the first plate 1211 protrudes from the outer peripheral wall of the magnet assembly 110, therefore the depth of the notch is equal to the thickness of the first plate 1211 of the positioning member 120, but is not limited thereto. As an example, in this embodiment, the protrusion 220 extends into the mounting groove 210 by a dimension of 0.5mm-2mm, but is not limited thereto.

[0100] Because a strong magnetic field exists between the magnet 111 and the rotor core 200, they will attract each other. In one embodiment of the present disclosure, the rotor assembly 10 is configured such that when the magnetic pole module 100 is assembled, the positioning member 120 is closer to the rotor core 200 relative to the outer peripheral wall of the magnet 111. Thus, when the magnetic pole module 100 is installed, the attraction will not cause damage to the surface coating of the magnet 111, reducing the risk of corrosion.

[0101] According to an exemplary embodiment of this disclosure, by providing a mounting slot 210 on the rotor core 200, the magnetic pole module 100 can be plugged in and installed, ensuring the installation requirements of the magnetic pole module 100. Since the magnetic pole module 100 includes a positioning element 120 and a magnet assembly 110, and the magnet assembly 110 includes at least two magnets 111, the positioning element 120 can fix the relative position between at least two magnets 111. Because a ventilation gap is formed between two adjacent magnets 111, and the ventilation gap communicates with the radial air duct 240, cooling airflow can pass through the radial air duct 240 and the ventilation gap to meet the cooling and heat dissipation requirements of the rotor assembly 10, improving the reliability of the generator where the rotor assembly 10 is located. The rotor core 200 is provided with a mounting groove 210, which allows the rotor core 200 and the shaft 300 to be connected and fixed by a high-temperature heat fitting when assembling the rotor assembly 10, and then the magnetic pole module 100 to be inserted into the mounting groove 210. This avoids the magnetic pole module 100 from being heated to the high temperature and affecting its performance, thus improving the reliability of the rotor assembly 10.

[0102] One embodiment of the rotor assembly 10 disclosed herein provides two or more magnetic pole modules 100 arranged within the mounting slot 210. While ensuring the rotor assembly 10 meets the power generation requirements of the generator, it can shorten the axial length of a single magnetic pole module 100 along the rotor core 200, increase the strength of a single magnetic pole module 100, and reduce the impact of deformation of the magnetic pole module 100 under gravity on the performance of the rotor assembly 10. Furthermore, the inter-module ventilation gap formed between adjacent magnetic pole modules 100 can ensure the ventilation and heat dissipation requirements between the magnets 111 of adjacent magnetic pole modules 100, thereby improving the reliability of the rotor assembly 10.

[0103] In the description of this disclosure, it should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0104] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0105] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0106] The features, structures, or characteristics described in this disclosure can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the foregoing description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

Claims

1. A rotor core, characterized in that, The rotor core (200) is provided with a mounting groove (210) for mounting the magnetic pole module (100). The mounting groove (210) extends along the axial direction of the rotor core (200). The inner sidewall of the mounting groove (210) forms a core mating part. The core mating part includes a protrusion (220) protruding into the mounting groove (210) and / or a notch recessed from the inner sidewall of the mounting groove (210).

2. The rotor core according to claim 1, characterized in that, The magnetic pole module (100) is provided with a magnetic pole mating part, the iron core mating part includes one of the notch part and the protrusion (220), and the magnetic pole mating part includes the other of the notch part and the protrusion (220). When the magnetic pole module (100) is placed in the mounting groove (210), the protrusion (220) is inserted into the notch part.

3. The rotor core according to claim 2, characterized in that, The protrusion (220) extends into the notch by a dimension smaller than the depth of the notch.

4. The rotor core according to claim 1, characterized in that, The mounting groove (210) has a first sidewall and a second sidewall disposed opposite to each other, and the core mating part is formed on at least one of the first sidewall and the second sidewall.

5. The rotor core according to claim 4, characterized in that, The first sidewall and the second sidewall are disposed on opposite sides of the mounting groove (210) in the radial direction of the rotor core (200), and the core mating part is centrally disposed on the first sidewall and the second sidewall in the circumferential direction of the rotor core (200).

6. A magnetic pole module, characterized in that, For use with rotor core (200), the magnetic pole module (100) is provided with a magnetic pole mating part, the magnetic pole mating part including a notch formed by a recess in the outer peripheral wall of the magnetic pole module (100) and / or a protrusion (220) formed by protruding outward from the outer peripheral wall of the magnetic pole module (100).

7. The magnetic pole module according to claim 6, characterized in that, The rotor core (200) is provided with a core mating part and a mounting groove (210) for mounting the magnetic pole module (100). The magnetic pole mating part includes one of the notch and the protrusion (220), and the core mating part includes the other of the notch and the protrusion (220). When the magnetic pole module (100) is placed in the mounting groove (210), the protrusion (220) is inserted into the notch.

8. The magnetic pole module according to claim 6, characterized in that, The magnetic pole module (100) includes a magnet assembly (110) and at least two positioning members (120). Each positioning member (120) extends a predetermined length along the axial direction of the rotor core (200). At least two positioning members (120) are arranged circumferentially spaced along the rotor core (200). The positioning members (120) are arranged to protrude or be recessed relative to the outer peripheral wall of the magnet assembly (110) to form the magnetic pole mating portion between two adjacent positioning members (120).

9. The magnetic pole module according to claim 8, characterized in that, There are two positioning elements (120), and the two positioning elements (120) are respectively disposed at both ends of the circumferential direction of the magnet assembly (110) on the rotor core (200).

10. The magnetic pole module according to claim 8, characterized in that, Each of the positioning elements (120) includes a positioning element body (121), the positioning element body (121) including a first plate (1211) and a second plate (1212), the first plate (1211) and the second plate (1212) being disposed opposite to each other on opposite sides of the magnet assembly (110), at least one of the first plate (1211) and the second plate (1212) being convex or recessed relative to at least a portion of the outer peripheral wall of the magnet assembly (110), the magnetic pole mating portion being formed between two adjacent first plates (1211), and / or, the magnetic pole mating portion being formed between two adjacent second plates (1212); or, The magnet assembly (110) has opposing first and second sides. Each positioning element (120) includes a positioning element body (121), the positioning element body (121) including a first plate (1211) connected to the first side of the magnet assembly (110). The first plate (1211) is convex or recessed relative to at least a portion of the outer peripheral wall of the magnet assembly (110). The magnetic pole mating portion is formed between two adjacent first plates (1211); or, Each of the positioning elements (120) includes a positioning element body (121), the positioning element body (121) including a second plate (1212) connected to the second side of the magnet assembly (110), the second plate (1212) being convex or recessed relative to the outer peripheral wall of the magnet assembly (110), and the magnetic pole mating portion being formed between two adjacent second plates (1212).

11. The magnetic pole module according to any one of claims 7-10, characterized in that, The protrusion (220) extends into the notch by a dimension smaller than the depth of the notch.

12. The magnetic pole module according to any one of claims 8-10, characterized in that, The magnet assembly (110) includes at least two magnets (111), each of which is connected to the positioning member (120). The at least two magnets (111) are spaced apart along the axial direction of the rotor core (200) to form a ventilation gap between adjacent magnets (111).

13. The magnetic pole module according to claim 12, characterized in that, The magnet assembly (110) further includes at least two limiting blocks (112). In the axial direction of the rotor core (200), the limiting blocks (112) are supported between two adjacent magnets (111). In the circumferential direction of the rotor core (200), at least two limiting blocks (112) are spaced apart so that the ventilation gap is located between two adjacent limiting blocks (112).

14. A magnetic pole module, characterized in that, Suitable for a rotor core (200) having a mounting groove (210) extending axially therein, a magnetic pole module (100) is used to be inserted into the mounting groove (210), the magnetic pole module (100) including a magnet assembly (110) and a positioning element (120), the magnet assembly (110) including at least two magnets (111) spaced apart axially along the rotor core (200), with a ventilation gap formed between adjacent magnets (111). The positioning element (120) includes a positioning element body (121) and a flange protrusion (122). In the radial direction of the rotor core (200), the positioning element body (121) is connected to at least one side of the magnet assembly (110). The flange protrusion (122) extends from the positioning element body (121) along the circumferential direction of the rotor core (200). In the axial direction of the rotor core (200), the flange protrusion (122) is at least partially located in the ventilation gap.

15. The magnetic pole module according to claim 14, characterized in that, The magnet assembly (110) has a first side and a second side opposite to each other. The positioning component body (121) includes a first plate (1211) connected to a first side of the magnet assembly (110), and the retaining protrusion (122) includes a first protrusion (1221) connected to the first plate (1211); and / or, The positioning component body (121) includes a second plate (1212) connected to the second side of the magnet assembly (110), and the edge protrusion (122) includes a second protrusion (1222) connected to the second plate (1212).

16. The magnetic pole module according to claim 15, characterized in that, The positioning component body (121) includes a first plate (1211) and a second plate (1212) arranged opposite to each other in the radial direction of the rotor core (200). The flange protrusion (122) includes a first protrusion (1221) and a second protrusion (1222). The first protrusion (1221) is connected to the first plate (1211), and the second protrusion (1222) is connected to the second plate (1212). In the radial direction of the rotor core (200), the distance between the first protrusion (1221) and the second protrusion (1222) is greater than the distance between the first plate (1211) and the second plate (1212).

17. A rotor assembly, characterized in that, The rotor assembly (10) includes a rotor core according to any one of claims 1-5 and a magnetic pole module according to any one of claims 6-13, wherein the magnetic pole mating portion includes one of a notch and a protrusion (220), and the core mating portion includes the other of the notch and the protrusion (220), wherein when the magnetic pole module (100) is disposed in the mounting groove (210), the protrusion (220) is inserted into the notch; or, The rotor assembly includes a magnetic pole module according to any one of claims 14-16.

18. An electric motor, characterized in that, The motor includes the rotor assembly according to claim 17.

19. A wind turbine generator set, characterized in that, The wind turbine generator set includes the motor according to claim 18, wherein the motor is a generator.

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