A stator assembly and a generator

Abstract

This application relates to the field of generator technology, and more particularly to a stator assembly and a generator. The stator assembly includes a stator core and a limiting structure. The stator core includes a stator yoke and stator teeth. The stator yoke includes multiple yoke segments connected sequentially along the circumference of the stator core to form the stator yoke. Multiple stator teeth are provided, and the stator teeth are separately connected to the yoke segments. The limiting structure includes a first limiting member and a second limiting member. Along the axial direction of the stator core, the first limiting member and the second limiting member are respectively disposed on opposite sides of the stator core to abut against the corresponding sides of the stator teeth. Applying the technical solution of this application can improve the production efficiency of the stator assembly.

Description

Technical Field

[0001] This application relates to the field of generator technology, and more particularly to a stator assembly and a generator. Background Technology

[0002] Generators, as core equipment for converting mechanical energy into electrical energy, utilize various energy sources, including fossil fuels, nuclear energy, and renewable energy. Among renewable energy sources, tidal energy, as an important branch of ocean energy development, has enormous application prospects in the power generation field.

[0003] However, due to the influence of the working environment, energy capture method, material mechanical properties and electromagnetic design requirements of tidal current generators, tidal current generators usually have the structural characteristics of large radial dimensions, short axial length and thin magnetic yoke, which increases the processing difficulty of the stator assembly on the generator and thus affects the production efficiency of the stator assembly on the generator. Utility Model Content

[0004] This application provides a stator assembly and a generator that can improve the production efficiency of the stator assembly.

[0005] In a first aspect, this application provides a stator assembly, which includes a stator core and a limiting structure. The stator core includes a stator yoke and a stator tooth. The stator yoke includes multiple yoke segments connected sequentially along the circumference of the stator core to form the stator yoke. Multiple stator teeth are provided, and the stator teeth are separately connected to the yoke segments. The limiting structure includes a first limiting member and a second limiting member. Along the axial direction of the stator core, the first limiting member and the second limiting member are respectively disposed on opposite sides of the stator core to abut against the corresponding sides of the stator teeth.

[0006] The technical solution provided in this application includes a stator assembly comprising a stator core and a limiting structure. The stator core includes a stator yoke and stator teeth. The stator yoke comprises multiple yoke segments connected sequentially along the circumference of the stator core to form the stator yoke. Multiple stator teeth are provided, and the stator teeth are separately connected to the yoke segments. This design of multiple yoke segments reduces the processing difficulty of the stator yoke, especially when the stator yoke is large, and also reduces the transportation difficulty. Multiple stator teeth are provided, and the stator teeth are separately connected to the yoke segments. Thus, different processing techniques can be used to manufacture the stator teeth and yoke segments. For example, the stator teeth can be manufactured using laser cutting or wire cutting, while the yoke segments can be manufactured using stamping. This avoids the problem of mold wear caused by core groove processing during integral stamping. The reduced processing difficulty of the stator core helps improve the production efficiency of the stator assembly. Furthermore, the stator teeth and yoke sections can be made of different materials depending on the requirements. For example, the stator teeth can be made of silicon steel sheets with high magnetic permeability and low iron loss, while the yoke section can be made of low-cost silicon steel or composite materials, reducing the material cost of the stator assembly. In addition, if the stator teeth are damaged, only the damaged teeth can be replaced, without replacing the entire stator core, improving the convenience of stator core maintenance. The limiting structure includes a first limiting member and a second limiting member, which are respectively disposed on opposite sides of the stator core along the axial direction of the stator core to abut against the corresponding sides of the stator teeth. Here, the first and second limiting members can restrict the position of the stator teeth to prevent relative movement between the stator teeth and the stator yoke along the axial direction of the stator core, improving the reliability of the stator assembly structure.

[0007] In one possible implementation provided in this application embodiment, a first splicing surface is formed between two adjacent yoke segments, and a second splicing surface is formed between the stator teeth and the yoke segments. The first splicing surface and the second splicing surface are spaced apart along the circumference of the stator core.

[0008] In one possible implementation provided in the embodiments of this application, along the axial direction of the stator core, the first limiting member at least partially covers the first splicing surface and the second splicing surface; and / or, along the axial direction of the stator core, the second limiting member at least partially covers the first splicing surface and the second splicing surface.

[0009] In one possible implementation provided in this application embodiment, the stator assembly further includes a fixing structure, and the first limiting member and the second limiting member are detachably connected to the stator core through the fixing structure.

[0010] In one possible implementation provided in this application embodiment, the fixing structure includes fasteners, a first limiting member having a first fixing hole, a stator core having a second fixing hole, and a second limiting member having a third fixing hole. Along the axial direction of the stator core, the fasteners pass through the first fixing hole, the second fixing hole, and the third fixing hole in sequence to fix the first limiting member and the second limiting member to opposite sides of the stator core.

[0011] In one possible implementation provided in this application embodiment, the first limiting member is continuously arranged along the circumferential direction of the stator core; and / or, the second limiting member is continuously arranged along the circumferential direction of the stator core.

[0012] In one possible implementation provided in the embodiments of this application, one of the yoke segment and the stator tooth segment has a first mounting groove, and the other of the yoke segment and the stator tooth segment has a first protrusion that is adapted to engage with the first mounting groove, so that the stator tooth segment and the yoke segment are separately connected.

[0013] In one possible implementation provided in this application embodiment, the stator assembly further includes a stator coil fitted on the stator teeth. The stator teeth have a first protrusion, the size of which is smaller than the size of the stator coil, so that the stator coil is fitted on the stator teeth via the first protrusion. The side of the stator teeth facing away from the first protrusion has a limiting protrusion for abutting against the stator coil.

[0014] Secondly, this application also provides a generator, which includes a frame and a stator assembly according to any one of the first aspects, the stator assembly being disposed on a base.

[0015] In the technical solution of this application, since the generator includes the stator assembly of the first aspect, it has the same technical effect. That is, it can improve the production efficiency of the stator assembly.

[0016] In one possible implementation provided in this application embodiment, the generator further includes a mounting structure and a seal. The mounting structure is disposed on the frame to form a mounting cavity together with the frame. The stator assembly is located in the mounting cavity, and the seal fills the space between the stator assembly and the inner wall of the mounting cavity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the generator provided in an embodiment of this application;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 A partial schematic diagram of a stator assembly provided in an embodiment of this application;

[0020] Figure 4 for Figure 3A schematic diagram of the structure of the middle stator coil being fitted into the stator teeth.

[0021] Figure label:

[0022] 1-Frame; 2-Stator assembly; 21-Stator core; 211-Stator teeth; 2111-First protrusion; 2112-Limiting protrusion; 212-Stator yoke; 2121-Yoke section; 21211-First mounting groove; 21212-Second protrusion; 21213-Second mounting groove; 213-First splicing surface; 214-Second splicing surface; 22-Limiting structure; 221-First limiting component; 222-Second limiting component; 23-Fixing structure; 231-Fastener; 24-Stator coil; 25-Insulating cardboard; 26-Slot wedge; 3-Mounting structure; 31-First baffle; 32-Second baffle; 33-Annular pressure plate; 4-Sealing element. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0025] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0026] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0027] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0028] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0029] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0030] In this embodiment of the application, for the sake of convenience in describing direction, Figure 1 The stator assembly 2 is provided with directions, wherein the first direction is the axial direction of the stator assembly 2, and the second direction is the radial direction of the stator assembly 2. It should be noted that the spatial coordinate system is used only to describe this application and is not intended to limit the scope of this application.

[0031] Generators, as core equipment for converting mechanical energy into electrical energy, utilize various energy sources, including fossil fuels, nuclear energy, and renewable energy. Among renewable energy sources, tidal energy, as an important branch of ocean energy development, has enormous application prospects in the power generation field.

[0032] However, due to the influence of the working environment, energy capture method, material mechanical properties and electromagnetic design requirements of tidal current generators, tidal current generators usually have the structural characteristics of large radial dimensions, short axial length and thin magnetic yoke, which increases the processing difficulty of the upper stator assembly 2 of the generator, thus affecting the production efficiency of the upper stator assembly 2 of the generator.

[0033] To solve the above problems, refer to Figure 1 , Figure 2 and Figure 3This application provides a stator assembly 2, which includes a stator core 21 and a limiting structure 22. The stator core 21 includes a stator yoke 212 and a stator tooth 211. The stator yoke 212 includes multiple yoke segments 2121, which are connected sequentially along the circumference of the stator core 21 to form the stator yoke 212. Multiple stator teeth 211 are provided, and the stator teeth 211 are separately connected to the yoke segments 2121. The limiting structure 22 includes a first limiting member 221 and a second limiting member 222. Along the axial direction of the stator core 21, the first limiting member 221 and the second limiting member 222 are respectively provided on opposite sides of the stator core 21 to abut against the corresponding sides of the stator teeth 211.

[0034] In this embodiment, the stator yoke 212 is the outer annular portion of the stator core 21, and its function is to connect the roots of each stator tooth 211 to form a closed magnetic circuit. The stator yoke 212 includes multiple yoke segments 2121, meaning that the stator yoke 212 is divided into multiple independent arc-shaped units, and the multiple yoke segments 2121 can be spliced ​​together along the circumference of the stator core 21 to form an annular stator yoke 212.

[0035] In this embodiment, there are multiple possibilities for the connection between adjacent yoke segments 2121. For example, adjacent yoke segments 2121 can be connected by non-removable methods such as adhesive or welding, or by detachable methods such as bolt connection or snap-fit. This embodiment does not limit the connection in this respect.

[0036] In this embodiment of the application, the stator tooth 211 is the part of the stator core 21 that protrudes inward. Along the circumference of the stator core 21, a core slot for accommodating the stator coil 24 can be formed between two adjacent stator teeth 211.

[0037] In this embodiment, the connection between the stator tooth section 211 and the yoke section 2121 can be varied. For example, the stator tooth section 211 and the yoke section 2121 can be connected by non-removable methods such as adhesive bonding or welding, or by detachable methods such as flange connection or plug-in connection. This embodiment does not limit the connection in this respect.

[0038] In this embodiment, the function of the first limiting member 221 and the second limiting member 222 is to restrict the position of the stator teeth 211 along the axial direction of the stator core 21. Therefore, the structural design of the first limiting member 221 and the second limiting member 222 can be various. For example, the first limiting member 221 and the second limiting member 222 can be a plate structure, a rod structure, or a frame structure. This embodiment does not limit this.

[0039] In this embodiment, since the stator teeth 211 and yoke section 2121 are designed as separate parts, they can be stamped using single-tooth dies and single-yoke dies. During stamping, the silicon steel sheet can be slightly larger than the size of a single stator tooth 211 or a single stator yoke 212, or the stator teeth 211 can be arranged on a larger silicon steel sheet to reduce material waste. After the stator teeth 211 and yoke section 2121 are stamped, they can be stacked and bonded together according to the iron length (axial height of the stator core 21) and the stacking coefficient.

[0040] In the technical solution provided in this application embodiment, the stator assembly 2 includes a stator core 21 and a limiting structure 22. The stator core 21 includes a stator yoke 212 and stator teeth 211. The stator yoke 212 includes multiple yoke segments 2121, which are sequentially connected along the circumference of the stator core 21 to form the stator yoke 212. Multiple stator teeth 211 are provided, and the stator teeth 211 are separately connected to the yoke segments 2121. Here, the stator yoke 212 includes multiple yoke segments 2121. The design of multiple yoke segments 2121 can reduce the processing difficulty of the stator yoke 212, especially when the stator yoke 212 is large, it can also reduce the transportation difficulty of the stator yoke 212. Multiple stator teeth 211 are provided, and the stator teeth 211 are separately connected to the yoke segments 2121. In this way, the stator teeth 211 and yoke section 2121 can be manufactured using different processing techniques. For example, the stator teeth 211 can be manufactured using laser cutting or wire cutting, while the yoke section 2121 can be manufactured using stamping. This avoids the problem of mold wear caused by the machining of the core slots during integral stamping, thus improving the production efficiency of the stator assembly 2. Furthermore, the stator teeth 211 and yoke section 2121 can also be made of different materials depending on requirements. For example, the stator teeth 211 can be made of silicon steel sheets with high magnetic permeability and low iron loss, while the yoke section 2121 can be made of low-cost silicon steel or composite materials, reducing the material cost of the stator assembly 2. In addition, if the stator teeth 211 are damaged, the damaged stator teeth 211 can be replaced individually, improving the convenience of maintenance for the stator teeth 211. The limiting structure 22 includes a first limiting member 221 and a second limiting member 222. Along the axial direction of the stator core 21, the first limiting member 221 and the second limiting member 222 are respectively disposed on opposite sides of the stator core 21 to abut against the corresponding sides of the stator teeth 211. Here, the first limiting member 221 and the second limiting member 222 can restrict the position of the stator teeth 211 to prevent relative movement between the stator teeth 211 and the stator yoke 212 along the axial direction of the stator core 21, thereby improving the reliability of the stator assembly 2 structure.

[0041] It should be noted that when the stator tooth section 211 is connected to the yoke section 2121, air gaps or seams should be eliminated as much as possible to avoid magnetic flux leakage at the junction of the stator tooth section 211 and the yoke section 2121 due to sudden changes in magnetic resistance, thus ensuring the continuity of the magnetic circuit and improving the utilization rate of the magnetic field.

[0042] Reference Figure 3 In this embodiment, a first splicing surface 213 is formed between two adjacent yoke segments 2121, and a second splicing surface 214 is formed between the stator tooth portion 211 and the yoke segment 2121. The first splicing surface 213 and the second splicing surface 214 are spaced apart along the circumference of the stator core 21. This spaced arrangement of the first splicing surface 213 and the second splicing surface 214 can reconstruct the stress transmission path, transforming concentrated loads into distributed loads, improving the stress distribution inside the stator core 21, and further enhancing the reliability of the stator assembly 2 structure.

[0043] In another possible embodiment of this application, the first splicing surface 213 and the second splicing surface 214 may also be continuously arranged along the circumference of the stator core 21. This embodiment of the application does not limit this.

[0044] In this embodiment, along the axial direction of the stator core 21, the first limiting member 221 at least partially covers the first splicing surface 213 and the second splicing surface 214; and / or, along the axial direction of the stator core 21, the second limiting member 222 at least partially covers the first splicing surface 213 and the second splicing surface 214. Thus, when the first limiting member 221 at least partially covers the first splicing surface 213 and the second splicing surface 214 along the axial direction of the stator core 21, the preload of the first limiting member 221 on the stator core 21 will form an orthogonal vector superposition with the contact stress at the first splicing surface 213 and the second splicing surface 214, allowing the location of the maximum shear stress on the stator assembly 2 to shift towards the first limiting member 221, further improving the stress distribution inside the stator core 21. Similarly, when the second limiting member 222 covers at least part of the first splicing surface 213 and the second splicing surface 214 along the axial direction of the stator core 21, the preload of the second limiting member 222 on the stator core 21 will form an orthogonal vector superposition with the contact stress at the first splicing surface 213 and the second splicing surface 214, so that the position of the maximum shear stress on the stator assembly 2 can be transferred into the second limiting member 222, further improving the stress distribution inside the stator core 21.

[0045] In this embodiment, the first limiting member 221 may partially cover the first splicing surface 213 and the second splicing surface 214 along the axial direction of the stator core 21, or it may completely cover the first splicing surface 213 and the second splicing surface 214 along the axial direction of the stator core 21. This embodiment does not impose any limitation on this. Similarly, the second limiting member 222 may partially cover the first splicing surface 213 and the second splicing surface 214 along the axial direction of the stator core 21, or it may completely cover the first splicing surface 213 and the second splicing surface 214 along the axial direction of the stator core 21. This embodiment also does not impose any limitation on this.

[0046] In this embodiment, the first limiting member 221 and the second limiting member 222 may both at least partially cover the first splicing surface 213 and the second splicing surface 214 along the axial direction of the stator core 21; or, only the first limiting member 221 may at least partially cover the first splicing surface 213 and the second splicing surface 214 along the axial direction of the stator core 21; or, only the second limiting member 222 may at least partially cover the first splicing surface 213 and the second splicing surface 214 along the axial direction of the stator core 21. This embodiment does not limit the specific application of this embodiment.

[0047] In this embodiment, the first limiting member 221 and the second limiting member 222 can be connected to the stator core 21 by welding, bonding, or other methods. (Refer to...) Figure 1 In another possible embodiment of this application, the stator assembly 2 further includes a fixing structure 23, and the first limiting member 221 and the second limiting member 222 are detachably connected to the stator core 21 through the fixing structure 23. In this way, when maintaining the stator core 21, the first limiting member 221 and the second limiting member 222 can be detached from the stator core 21, further improving the convenience of maintaining the stator core 21.

[0048] In this embodiment of the application, the structure of the fixing structure 23 can have a variety of possible forms. For example, the fixing structure 23 may include a buckle and a slot adapted to the buckle. The buckle is respectively disposed on the first limiting member 221 and the second limiting member 222, and the slot is disposed on the opposite sides of the stator core 21 along the axial direction of the stator core 21. The first limiting member 221 and the second limiting member 222 respectively engage with the slot on the corresponding side of the stator core 21.

[0049] Reference Figure 2In one possible embodiment of this application, the fixing structure 23 includes a fastener 231, a first limiting member 221 having a first fixing hole, a stator core 21 having a second fixing hole, and a second limiting member 222 having a third fixing hole. Along the axial direction of the stator core 21, the fastener 231 passes through the first fixing hole, the second fixing hole, and the third fixing hole in sequence to fix the first limiting member 221 and the second limiting member 222 to opposite sides of the stator core 21. Thus, after the stator tooth portion 211 and the stator yoke portion 212 are assembled, the first limiting member 221 and the second limiting member 222 can be placed on the corresponding sides of the stator core 21, so that the first fixing hole, the second fixing hole, and the third fixing hole are aligned along the axial direction of the stator core 21. Then, the fastener 231 passes through the first fixing hole, the second fixing hole, and the third fixing hole in sequence to complete the fixing of the first limiting member 221 and the second limiting member 222.

[0050] In this embodiment, the shape design of the first limiting member 221 and the second limiting member 222 can be various. For example, the first limiting member 221 and the second limiting member 222 can be regular shapes such as arcs and rectangles, or they can be irregular shapes. This embodiment does not limit them.

[0051] In one possible embodiment of this application, the first limiting member 221 is continuously arranged along the circumference of the stator core 21; and / or, the second limiting member 222 is continuously arranged along the circumference of the stator core 21. Here, the first limiting member 221 is continuously arranged along the circumference of the stator core 21, that is, the shape of the first limiting member 221 is annular, so that the first limiting member 221 can simultaneously limit multiple stator teeth 211, reducing the number of first limiting members 221 and thus improving the production efficiency of the stator assembly 2. Similarly, the second limiting member 222 is continuously arranged along the circumference of the stator core 21, that is, the shape of the second limiting member 222 is annular, so that the second limiting member 222 can simultaneously limit multiple stator teeth 211, reducing the number of second limiting members 222 and also improving the production efficiency of the stator assembly 2.

[0052] In this embodiment of the application, the first limiting member 221 and the second limiting member 222 may both be continuously arranged along the circumference of the stator core 21; or, only the first limiting member 221 may be continuously arranged along the circumference of the stator core 21; or, only the second limiting member 222 may be continuously arranged along the circumference of the stator core 21. This embodiment of the application does not impose any restrictions on this.

[0053] Reference Figure 3In this embodiment, one of the yoke segment 2121 and the stator tooth segment 211 has a first mounting groove 21211, and the other of the yoke segment 2121 and the stator tooth segment 211 has a first protrusion 2111 that is adapted to and engages with the first mounting groove 21211, so that the stator tooth segment 211 and the yoke segment 2121 can be connected separately. In this way, the stator tooth segment 211 can be connected to the yoke segment 2121 by a snap-fit ​​method, which is more convenient and improves the production efficiency of the stator assembly 2.

[0054] In the embodiments of this application, reference is made to Figure 3 The first mounting groove 21211 can be disposed on the yoke section 2121, and the first protrusion 2111 can be disposed on the stator tooth section 211; or, the first mounting groove 21211 can be disposed on the stator tooth section 211, and the first protrusion 2111 can be disposed on the yoke section 2121. In this respect, the embodiments of this application do not limit the scope of the application.

[0055] In addition, it should be noted that the shape of the first mounting groove 21211 can be various. For example, the shape of the first mounting groove 21211 can be trapezoidal or dovetail-shaped. This application embodiment does not limit this.

[0056] Reference Figure 3 and Figure 4 In this embodiment, the stator assembly 2 further includes a stator coil 24 fitted onto the stator tooth portion 211. The stator tooth portion 211 has a first protrusion 2111, the size of which is smaller than that of the stator coil 24, so that the stator coil 24 is fitted onto the stator tooth portion 211 via the first protrusion 2111. A limiting protrusion 2112 is provided on the side of the stator tooth portion 211 facing away from the first protrusion 2111 for abutting against the stator coil 24. In this way, the stator coil 24 can be individually wound using a winding machine and a winding mold, and then the stator coil 24 can be fitted onto the stator tooth portion 211 via the first protrusion 2111. Then, the stator tooth portion 211 is connected to the yoke section 2121, and the limiting protrusion 2112 on the stator tooth portion 211 abuts against the stator coil 24 to prevent the stator coil 24 from falling off the stator tooth portion 211. This avoids the complex operation of traditional winding, thereby improving the production efficiency of stator assembly 2. In addition, when a single stator coil 24 is damaged, only the stator coil 24 corresponding to the stator tooth 211 needs to be replaced, without disassembling the entire stator winding, which greatly reduces maintenance costs and time.

[0057] Reference Figure 3In this embodiment, the stator assembly 2 may further include a slot wedge 26, which is inserted into the slot of the core slot to fix the stator coil 24. In this way, under the force of the slot wedge 26, the stator coil 24 can be better filled in the core slot, thereby improving the electrode slot fill factor of the stator assembly 2. It should be noted that the electrode slot fill factor is used to describe the percentage of the cross-sectional area occupied by conductive material (such as the stator coil 24) within the core slot, reflecting the utilization efficiency of the space within the core slot.

[0058] Additionally, refer to Figure 3 In this embodiment, the stator assembly 2 may further include insulating paperboard 25. Thus, before the stator coil 24 is fitted into the stator tooth 211, an insulating paperboard 25 can be wrapped around the outside of the stator coil 24. After the stator tooth 211 assembly is joined with the yoke segment 2121, the corresponding sides of the insulating paperboard 25 can be respectively attached to the stator tooth 211, the stator yoke 212, the slot wedge 26, and the adjacent stator coil 24 to achieve isolation between the stator coil 24 and the stator core 21.

[0059] In this embodiment, a single yoke segment 2121 may have multiple first mounting slots 21211, so that multiple stator teeth 211 can be connected to a single yoke segment 2121. In this way, the number of yoke segments 2121 can be reduced, thereby reducing the accumulation of errors when the yoke segments 2121 are spliced ​​to form the stator yoke 212, which is beneficial to improving the coaxiality of the stator yoke 212.

[0060] In this embodiment, along the circumferential direction of the stator core 21, one end of the yoke section 2121 has a second mounting groove 21213, and the other end has a second protrusion 21212 that is adapted to and engages with the second mounting groove 21213. Thus, referring to... Figure 3 Adjacent yoke segments 2121 can be connected by a second protrusion 21212 and a second mounting groove 21213, which makes the operation more convenient and improves the production efficiency of the stator assembly 2.

[0061] It should be noted that the shape of the second mounting groove 21213 can be various. For example, the shape of the second mounting groove 21213 can be trapezoidal or dovetail-shaped. This application embodiment does not limit this.

[0062] Based on this, refer to Figure 1 This application embodiment also provides a generator, which includes a frame 1 and a stator assembly 2, the stator assembly 2 being disposed on the frame 1.

[0063] In this embodiment of the application, the generator can be a wind turbine, a hydroelectric generator, or a solar generator; this embodiment of the application does not limit the type of generator.

[0064] The generator provided in this application embodiment includes the stator assembly 2 of this application embodiment, and therefore also has the same technical effect. That is, it can improve the production efficiency of the stator assembly 2.

[0065] Reference Figure 1 and Figure 2 In this embodiment, the generator further includes a mounting structure 3 and a sealing element 4. The mounting structure 3 is disposed on the base 1 to form a mounting cavity together with the base 1. The stator assembly 2 is located within the mounting cavity, and the sealing element 4 is disposed between the stator assembly 2 and the inner wall of the mounting cavity. Thus, the mounting structure 3, the sealing element 4, and the base 1 can jointly provide protection for the periphery of the stator assembly 2, simplifying the generator's waterproof sealing structure. Furthermore, when the generator operates underwater, the stator assembly 2 comes into contact with water through the sealing element 4, allowing the heat generated by the stator assembly 2 to be conducted to the water through the sealing element 4, thereby improving the generator's heat dissipation efficiency.

[0066] In this embodiment, the seal 4 can take many forms. For example, the seal 4 can be potting compound, silicone rubber, or sealing filler. This embodiment does not limit the form of the seal 4.

[0067] In this embodiment, the stator assembly 2 can be assembled onto the base 1 via a heat-shrink fitting. When the sealant 4 is a potting compound, the mounting cavity formed by the mounting structure 3 and the base 1 can constitute a potting space, allowing the potting compound to pot the stator assembly 2.

[0068] In this embodiment, the mounting structure 3 can have various structural forms. For example, the mounting structure 3 may include multiple arc-shaped mounting shells, which are sequentially spliced ​​together along the axial direction of the stator core 21 and together with the base 1 to form a mounting cavity. Alternatively, refer to... Figure 2 The mounting structure 3 may include a first baffle 31, a second baffle 32 and an annular pressure plate 33. The first baffle 31 and the second baffle 32 are spaced apart on the base 1 along the axial direction of the stator core 21. Both the first baffle 31 and the second baffle 32 have stop steps. The annular pressure plate 33 is fixed between the first baffle 31 and the second baffle 32 by the stop steps to form a mounting cavity.

[0069] It should be noted that when setting the first baffle 31, the second baffle 32, and the annular pressure plate 33, a gap should be reserved between the first baffle 31 and the second baffle 32 and the stator coil 24, and a gap should be reserved between the annular pressure plate 33 and the stator teeth 211, to meet the discharge safety distance. In addition, the sealing element 4 is set between the stator assembly 2 and the inner wall of the mounting cavity, that is, the sealing element 4 fills the gap between the stator assembly 2 and the mounting structure 3.

[0070] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A stator assembly characterized by, include: The stator core includes a stator yoke and a stator tooth. The stator yoke includes multiple yoke segments, which are connected sequentially along the circumference of the stator core to form the stator yoke. The stator tooth is provided in multiple parts, and the stator tooth is separately connected to the yoke segments. The limiting structure includes a first limiting member and a second limiting member. Along the axial direction of the stator core, the first limiting member and the second limiting member are respectively disposed on opposite sides of the stator core so as to abut against the corresponding sides of the stator teeth.

2. The stator assembly of claim 1, wherein, A first splicing surface is formed between two adjacent yoke segments, and a second splicing surface is formed between the stator teeth and the yoke segments. The first splicing surface and the second splicing surface are spaced apart along the circumference of the stator core.

3. The stator assembly of claim 2, wherein, Along the axial direction of the stator core, the first limiting member at least partially covers the first splicing surface and the second splicing surface; and / or, along the axial direction of the stator core, the second limiting member at least partially covers the first splicing surface and the second splicing surface.

4. The stator assembly of claim 1, wherein, The stator assembly further includes a fixing structure, and the first limiting member and the second limiting member are detachably connected to the stator core through the fixing structure.

5. The stator assembly of claim 4, wherein, The fixing structure includes fasteners, the first limiting member has a first fixing hole, the stator core has a second fixing hole, and the second limiting member has a third fixing hole. Along the axial direction of the stator core, the fasteners pass through the first fixing hole, the second fixing hole, and the third fixing hole in sequence to fix the first limiting member and the second limiting member to opposite sides of the stator core.

6. The stator assembly of claim 1, wherein, The first limiting member is continuously arranged along the circumference of the stator core; and / or, the second limiting member is continuously arranged along the circumference of the stator core.

7. The stator assembly of any of claims 1-6, wherein, One of the yoke section and the stator tooth has a first mounting groove, and the other of the yoke section and the stator tooth has a first protrusion that is adapted to engage with the first mounting groove, so that the stator tooth is separately connected to the yoke section.

8. The stator assembly of claim 7, wherein, The stator assembly further includes a stator coil fitted onto the stator teeth. The stator teeth have a first protrusion, the size of which is smaller than the size of the stator coil, so that the stator coil is fitted onto the stator teeth via the first protrusion. The stator teeth have a limiting protrusion on the side opposite to the first protrusion for abutting against the stator coil.

9. An electric generator characterized by include: Base; The stator assembly according to any one of claims 1-8, wherein the stator assembly is disposed on the frame.

10. The electric generator of claim 9, wherein, The generator also includes a mounting structure and a seal. The mounting structure is disposed on the base to form a mounting cavity together with the base. The stator assembly is located in the mounting cavity, and the seal is filled between the stator assembly and the inner wall of the mounting cavity.

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