Winding assembly, generator and wind generating set

Abstract

The invention relates to a winding assembly, a generator and a wind generating set, and the winding assembly comprises an iron core which comprises an iron core main body and iron core teeth protruding out of the iron core main body in the radial direction of the winding assembly, the multiple iron core teeth are arranged at intervals in the circumferential direction of the winding assembly, and a mounting groove is formed between every two adjacent iron core teeth; the coils are arranged in the mounting grooves respectively, and at least part of the coils extend in the axial direction of the winding assembly and penetrate through the mounting grooves; and the fixing piece comprises a fixing main body and a plurality of connecting parts which are connected with each other, the connecting parts are connected with the ends, deviating from the iron core main body, of the iron core teeth, the fixing main body extends in the circumferential direction and is provided with a plurality of fixing grooves at intervals, and the fixing grooves and the mounting grooves are correspondingly arranged in the radial direction and are communicated with each other. According to the winding assembly provided by the embodiment of the invention, an original slot wedge structure can be omitted, so that an air gap can be reduced, and magnetic resistance and vibration noise can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a winding assembly, a generator and a wind power generator set. Background Art

[0002] Existing generators are usually composed of a stator and a rotor that rotate with each other. At least one of the stator and the rotor is provided with a winding assembly made of a coil as the main body. In this structure, the coil is usually embedded in the slot body on the iron core, and a slot wedge is provided at the slot to fix the position of the coil to prevent the coil from slipping during rotation. However, the presence of the slot wedge increases the magnetic resistance at the slot and reduces the thermal conductivity, which has an adverse effect on the working efficiency of the generator. In order to ensure the structural strength, the slot wedge often has a certain thickness. In order to be compatible with the thickness of the structure, the air gap needs to be increased accordingly, which is not conducive to reducing the air gap width. In addition, the presence of the slot wedge easily leads to increased vibration and noise during the operation of the generator.

[0003] Therefore, there is an urgent need for a winding assembly with a slot-free wedge structure and a corresponding generator and wind turbine generator set. Summary of the invention

[0004] The embodiments of the present application provide a winding assembly, a generator and a wind turbine generator set, wherein the winding assembly can reduce the air gap, magnetic resistance and vibration noise.

[0005] In the first aspect, according to an embodiment of the present application, a winding assembly is proposed, including: an iron core, including an iron core body and iron core teeth protruding from the iron core body along the radial direction of the winding assembly, a plurality of iron core teeth are arranged at intervals along the circumferential direction of the winding assembly, and installation grooves are formed between adjacent iron core teeth; a coil, a plurality of coils are respectively arranged in the installation grooves, and the coils at least partially extend along the axial direction of the winding assembly and pass through the installation grooves; a fixing member, including a fixing body and a plurality of connecting parts connected to each other, the connecting part is connected to one end of the iron core tooth away from the iron core body, the fixing body extends along the circumferential direction and has a plurality of fixing grooves arranged at intervals, and in the radial direction, the fixing grooves and the installation grooves are arranged correspondingly and connected to each other.

[0006] According to one aspect of an embodiment of the present application, the fixed body includes a plurality of first sub-parts and a second sub-part, the first sub-part is connected between the second sub-part and the connecting part, the second sub-part is arc-shaped and extends circumferentially, the plurality of first sub-parts are arranged at intervals along the circumferential direction and correspond one-to-one with the connecting part, and an installation groove is formed between adjacent first sub-parts.

[0007] According to one aspect of the embodiment of the present application, the first sub-portion is axially protruding from the connecting portion, and in the radial direction, the orthographic projection of the second sub-portion and the orthographic projection of the connecting portion are at least partially offset from each other.

[0008] According to one aspect of the embodiment of the present application, two side surfaces of the first sub-part that are arranged opposite to each other in the circumferential direction and one side surface of the second sub-part close to the coil are at least partially protruded with anti-slip grooves.

[0009] According to one aspect of the embodiment of the present application, the first sub-portion, the second sub-portion and the connecting portion are welded and connected or integrally formed, and the connecting portion is detachably connected to the core teeth.

[0010] According to one aspect of the embodiment of the present application, in the radial direction, the extension dimensions of the first sub-portion and the second sub-portion are both 5 mm to 10 mm.

[0011] According to one aspect of an embodiment of the present application, the winding assembly includes a plurality of fixing parts, the plurality of fixing parts include a first fixing group and a second fixing group respectively arranged on opposite sides of the iron core in the axial direction, the plurality of fixing parts in the first fixing group and the plurality of fixing parts in the second fixing group are respectively arranged in sequence in the circumferential direction, and the extension dimensions of the plurality of fixing parts in the circumferential direction are the same.

[0012] According to one aspect of an embodiment of the present application, the number of magnetic poles of the winding assembly is N1, the number of fixing members in the first fixing group is N2, the number of fixing members in the second fixing group is N3, N1≤N2≤1.5N1, N1≤N3≤1.5N1.

[0013] According to one aspect of an embodiment of the present application, the winding assembly also includes an auxiliary fixing component, which includes a plurality of positioning columns and a fixing belt. The positioning columns are arranged to protrude axially from the core body. The plurality of positioning columns are arranged on the side of the mounting groove away from the fixing member and are arranged at intervals in the circumferential direction. The fixing belt is arranged around two or more positioning columns and the coil.

[0014] According to one aspect of an embodiment of the present application, the coil extends in a ring shape, and the coil includes a coil body extending axially and a bending portion connected between the coil bodies. In the axial direction, the coil body at least partially protrudes from the iron core, and the fixing belt abuts against the area of ​​the coil body protruding from the iron core.

[0015] According to one aspect of the embodiment of the present application, in the radial direction, the extension dimension of the installation groove is L1, the extension dimension of the fixing belt is L2, and 0.8L1≤L2≤1.2L1.

[0016] According to one aspect of the embodiment of the present application, the fixing belt includes at least one of nylon and polyester fiber.

[0017] According to one aspect of the embodiment of the present application, two side walls of the mounting groove that are opposite to each other in the circumferential direction are arranged parallel to each other, and a cross-sectional shape formed by the mounting groove in a cross section perpendicular to the axial direction is a rectangle.

[0018] In a second aspect, according to an embodiment of the present application, a generator is proposed, comprising: a stator; and a rotor, which is coaxially arranged with the stator and rotatably matched, and at least one of the stator and the rotor comprises a winding assembly in any embodiment of the first aspect.

[0019] In a third aspect, according to an embodiment of the present application, a wind turbine generator set is proposed, comprising the generator in any embodiment of the second aspect.

[0020] The winding assembly provided in the embodiment of the present application includes an iron core, a coil and a fixing part, wherein the iron core includes an iron core body and iron core teeth protruding from the iron core body, a mounting groove is formed between adjacent iron core teeth, the coil is arranged in the mounting groove, and the coil is fixed in the radial direction by a fixing part connected to the iron core teeth, thereby eliminating the slot wedge structure originally arranged at the slot opening of the mounting groove, thereby making the iron core conduction smoother, thereby reducing magnetic resistance. At the same time, not setting the slot wedge structure can also eliminate the part of the width dimension of the original air gap that is increased to accommodate the slot wedge thickness, thereby reducing the air gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0022] Figure 1 is a structural schematic diagram of a winding assembly provided by an embodiment of the present application;

[0023] Figure 2 is a partial structural schematic diagram of a winding assembly provided in one embodiment of the present application;

[0024] Figure 3 yes Figure 2 A magnified view of the area P shown;

[0025] Figure 4 is a partial structural schematic diagram of a winding assembly provided in another embodiment of the present application;

[0026] Figure 5 This is a schematic diagram of the partial structure of a winding assembly provided in yet another embodiment of the present application.

[0027] in:

[0028] 100-winding assembly;

[0029] 10-iron core; 20-coil; 30-fixing piece; 40-auxiliary fixing assembly;

[0030] 11-core body; 12-core teeth; 13-installation slot; 14-punch; 15-tooth pressure plate; 21-coil body; 22-bending part; 31-fixed body; 32-connecting part; 33-fixed slot; 41-positioning column; 42-fixed belt;

[0031] 311 - The first sub - part; 312 - The second sub - part;

[0032] X - Radial direction; Y - Axial direction. Detailed implementation manners

[0033] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, many specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application. In the drawings and the following description, at least some of the well - known structures and technologies are not shown in order to avoid unnecessarily obscuring the present application; and, for clarity, the dimensions of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0034] The orientation terms appearing in the following description are all the directions shown in the drawings, and do not limit the specific structures in the molding die and molding method of the present application. In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the meaning of "a plurality" is more than two, and the terms "mounted", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0036] In existing wind turbine generator sets, the impeller usually drives the rotor in the generator to rotate relative to the stator to generate electricity. At the same time, at least one of the rotor and the stator is usually provided with a winding assembly, which includes multiple coils, and generates electricity through the magnetic generation of magnetic flux lines by the coils cutting the magnetic flux lines. In order to fix the position of these coils, the winding assembly is usually provided with multiple radially extending mounting grooves and the coils are embedded in the mounting grooves. The slots are provided with slot wedges as fixing parts to prevent the coils from relative movement, slipping or collision damage during operation.

[0037] On this basis, the applicant found that the existing slot wedges are usually set at the notch of the installation slot close to the central axis of the winding assembly, and are connected and fixed by grooves, slide rails and other structures set on the side walls of the installation slot. The connection structure affects the shape of the teeth forming the installation slot, resulting in an increase in magnetic resistance at this location, and the magnetic field is most easily saturated. At the same time, in order to have the structural strength required for fixing the coil, the slot wedge usually has a certain thickness, for example, it can be 2mm to 5mm, and the slot wedge is usually made of insulating materials such as epoxy resin and glass fiber, which has a greater adverse effect on the heat dissipation at the notch of the installation slot. In order to balance this part of the heat, it is also necessary to increase the amount of magnetic steel and stator punchings, resulting in an increase in the cost of the winding assembly. In addition, the existence of the slot wedge requires a larger width of the air gap between the stator and the rotor to be compatible with the thickness of the slot wedge, which is not conducive to reducing the air gap width and is more likely to generate vibration noise.

[0038] In order to solve the above problems, an embodiment of the present application proposes a winding assembly, in which a fixing part connected to the tooth portion of the iron core is provided, and the fixing part can support and position the coil in the radial direction, thereby eliminating the original slot wedge structure, thereby reducing the air gap, reducing the magnetic resistance and vibration noise.

[0039] It can be understood that the following embodiments of the present application are only described by applying the winding assembly to a generator, but the winding assembly provided in the embodiments of the present application is not limited to the following embodiments, and can also be applied to other occasions where it is necessary to radially position the structure installed in the groove on the rotating body and protect it.

[0040] In order to better understand this application, Figures 1 to 5 The winding assembly, generator and wind turbine generator set provided in the present application are described in detail.

[0041] Please also read Figures 1 to 4 , Figure 1 is a schematic diagram of the structure of a winding assembly provided by an embodiment of the present application, Figure 2 is a partial structural diagram of a winding assembly provided in one embodiment of the present application, Figure 3 yes Figure 2 The enlarged view of the area P is shown. Figure 4 It is a schematic diagram of the partial structure of a winding assembly provided in another embodiment of the present application.

[0042] In the first aspect, according to an embodiment of the present application, a winding assembly 100 is proposed, including an iron core 10, a coil 20 and a fixing member 30, wherein the iron core 10 includes an iron core body 11 and iron core teeth 12 protruding from the iron core body 11 along a radial direction X of the winding assembly 100, a plurality of iron core teeth 12 are arranged at intervals along the circumferential direction of the winding assembly 100, and mounting grooves 13 are formed between adjacent iron core teeth 12; a plurality of coils 20 are respectively arranged in the mounting grooves 13, and the coils 20 at least partially extend along the axial direction Y of the winding assembly 100 and pass through the mounting grooves 13; the fixing member 30 includes a fixing body 31 and a plurality of connecting parts 32 which are connected to each other, the connecting part 32 is connected to one end of the iron core tooth 12 away from the iron core body 11, the fixing body 31 extends along the circumferential direction and has a plurality of fixing grooves 33 arranged at intervals, and in the radial direction X, the fixing grooves 33 are arranged corresponding to the mounting grooves 13 and are connected to each other.

[0043] The present application first provides a winding assembly 100, which includes an iron core 10, a coil 20 and a fixing member 30. Specifically, the iron core 10 is used as a main structure to provide support and magnetic conductivity, and can be composed of a plurality of punching sheets of corresponding shapes stacked together. The iron core 10 includes an iron core body 11 and iron core teeth 12, wherein the iron core body 11 can be annular or cylindrical, and is arranged as a rotating body with uniform mass distribution. A plurality of iron core teeth 12 are respectively protruded from the surface of the iron core body 11 along the radial direction X, and these iron core teeth 12 can have the same shape and size, and are arranged at equal intervals in the circumference of the iron core body 11, that is, in the circumference of the winding assembly 100. An installation groove 13 is formed between adjacent iron core teeth 12, and the installation groove 13 is used to install the coil 20, thereby, the shape and size of the iron core teeth 12 can be adjusted so that the installation groove 13 defined between every two adjacent iron core teeth 12 is adapted to the shape and size of the coil 20. Corresponding to the arrangement of the core teeth 12 , the mounting grooves 13 may have the same shape and size and be equally spaced in the circumferential direction.

[0044] The coil 20 is installed in the mounting groove 13 and is used to generate and transmit current during operation. The coil 20 can be annular and partially accommodated in the mounting groove 13, and the other part extends to both sides along the axial direction Y from the mounting groove 13. The partial section accommodated in the mounting groove 13 can extend along the axial direction Y, and the coil 20 as a whole can be installed and fixed through this partial section.

[0045] The fixing member 30 is connected to the core 10 and is used to fix the coil 20. Specifically, the fixing member 30 includes a fixing body 31 and a plurality of connecting parts 32, which are connected to each other, wherein the fixing body 31 is used to provide radial limiting effect for the coil 20, and the connecting part 32 is used to connect the fixing body 31 with the core teeth 12. Optionally, the connecting part 32 is arranged corresponding to the core teeth 12, and can be a plate-like member stacked on the end face of one side of the core teeth 12 intersecting the axial direction Y and arranged in accordance with the end face, so that the connection between the two is more stable and reliable. The fixing body 31 extends in the circumferential direction and can be approximately arc-shaped. In the radial direction X, the fixing body 31 can be at least partially located on the side of the coil 20 away from the core 10, so as to support and position the coil 20 in the radial direction X.

[0046] Further, the fixing body 31 may be provided with a plurality of fixing grooves 33 corresponding to the mounting groove 13 in the radial direction X, and the openings of these fixing grooves 33 face the core body 11 and may be communicated with the mounting groove 13, so that the coil 20 can be installed in the space defined by the two groove bodies being engaged with each other to achieve positioning in the radial direction X. Optionally, the fixing grooves 33 may be provided in a one-to-one correspondence with the mounting grooves 13, or the fixing grooves 33 may have a wider size and be communicated with a plurality of mounting grooves 13 at the same time.

[0047] Optionally, the fixing member 30 may be made of a non-magnetic material, such as 304 stainless steel or 316 stainless steel, so that it has a certain structural strength and good heat resistance and corrosion resistance.

[0048] It is understandable that an insulating structure may be provided between the coil 20 and the iron core 10, and the insulating structure is usually a thinner insulating paper, and the insulating paper may cover the side wall of the mounting groove 13 to insulate the coil 20 from the iron core 10. Optionally, the size of the insulating paper in the radial direction X may be extended to have a surplus area exceeding the coil 20 in this direction, and the surplus partial area may be bent and sandwiched between the coil 20 and the fixing member 30, thereby achieving insulation between the fixing member 30 and the coil 20.

[0049] In the embodiment of the present application, the winding assembly 100 is provided with a fixing part 30, and the fixing part 30 replaces the original slot wedge structure, so as to reduce the air gap and reduce the vibration noise while achieving stable positioning of the coil 20 in the radial direction X. At the same time, the fixing part 30 is connected to the core tooth 12 through the connecting part 32, and the notches of the mounting slot 13 can be staggered with each other, which is convenient for heat dissipation and reducing magnetic resistance.

[0050] In some optional embodiments, the fixed body 31 includes a plurality of first sub-portions 311 and a second sub-portion 312, the first sub-portion 311 is connected between the second sub-portion 312 and the connecting portion 32, the second sub-portion 312 is arc-shaped and extends circumferentially, the plurality of first sub-portions 311 are arranged at intervals along the circumferential direction and correspond one-to-one to the connecting portion 32, and the mounting groove 13 is formed between adjacent first sub-portions 311.

[0051] The fixed body 31 in the present application is formed with a plurality of fixing grooves 33 for fixing the coil 20. On this basis, the fixed body 31 can be composed of a plurality of first sub-parts 311 and a second sub-part 312, and the plurality of first sub-parts 311 can be respectively connected to the second sub-part 312. The second sub-part 312 can be an arc-shaped structure extending in the circumferential direction, and the first sub-part 311 can be arranged on a side of the second sub-part 312 close to the core body 11 in the radial direction X, and connected between the second sub-part 312 and the connecting part 32. Optionally, each first sub-part 311 can have the same shape and size, and the first sub-part 311 can correspond to the connecting part 32 one by one and be arranged at equal intervals in the circumferential direction.

[0052] Further, the fixed body 31 is provided with a plurality of fixed grooves 33, which can be provided between adjacent first sub-sections 311 and are formed by the first sub-sections 311 and the second sub-sections 312. Specifically, the first sub-sections 311 are arranged at intervals in the circumferential direction, and the two side surfaces of the adjacent first sub-sections 311 arranged opposite to each other in the circumferential direction can serve as the side walls of the fixed grooves 33, and at the same time, the side surface of the second sub-section 312 facing the core body 11 in the radial direction X can serve as the bottom wall of the fixed groove 33, thereby forming a fixed groove 33 with an opening toward the core body 11, and the coil 20 can partially extend into the fixed groove 33 and abut against the bottom wall formed by the second sub-section 312, thereby achieving positioning in the radial direction X.

[0053] Optionally, the cross-sectional shapes of the first sub-portion 311 and the second sub-portion 312 may both be rectangular, so that the overall extension direction of the surface forming the fixing groove 33 is relatively flat, the contact area with the coil 20 is increased, and processing and forming are facilitated.

[0054] The first sub-portion 311 and the second sub-portion 312 cooperate with each other to form a fixing groove 33 , so that the coil 20 can be positioned in the radial direction X and the circumferential direction at the same time, thereby improving the overall stability and reliability of the winding assembly 100 .

[0055] In some optional embodiments, the first sub-portion 311 is arranged to protrude from the connecting portion 32 along the axial direction Y, and in the radial direction X, the orthographic projection of the second sub-portion 312 and the orthographic projection of the connecting portion 32 are at least partially offset from each other.

[0056] As mentioned above, the first sub-portion 311 is connected between the second sub-portion 312 and the connecting portion 32, and together with the second sub-portion 312, it forms the wall of the fixing groove 33. On this basis, the first sub-portion 311 and the second sub-portion 312 can also be staggered with the connecting portion 32 in the axial direction Y. Specifically, the first sub-portion 311 can be extended along the axial direction Y by a certain distance from the side surface of the connecting portion 32 away from the core tooth 12, and the second sub-portion 312 can be connected to the side end surface of the first sub-portion 311 in the axial direction Y, or the second sub-portion 312 can be connected to the side surface of the first sub-portion 311 in the radial direction X away from the core body 11.

[0057] Further, the second sub-portion 312 should be at least partially staggered with the connecting portion 32 in the axial direction Y, that is, the second sub-portion 312 can be arranged on the outside of the iron core 10 in the axial direction Y, spaced from the iron core 10, and connected only through the first sub-portion 311 and the connecting portion 32. At this time, the orthographic projection of the second sub-portion 312 in the radial direction X can be at least partially staggered with the orthographic projection of the iron core 10 and the connecting portion 32 in this direction, and can be completely staggered. In this way, the influence of the second sub-portion 312 on the parameters such as the air gap at the notch of the mounting groove 13 and the heat dissipation performance can be further reduced, and the extension dimension of the first sub-portion 311 in the axial direction Y can be extended, so that the area of ​​the first sub-portion 311 clamping the coil 20 from both sides is increased, thereby increasing the friction force and making the fixation of the coil 20 more stable and reliable.

[0058] In some optional embodiments, two side surfaces of the first sub-portion 311 that are arranged opposite to each other in the circumferential direction and one side surface of the second sub-portion 312 that is close to the coil are at least partially protruded with anti-slip grooves.

[0059] Partial surfaces of the first sub-section 311 and partial surfaces of the second sub-section 312 in the present application respectively constitute the side wall and bottom wall of the fixing groove 33. On this basis, in order to further stabilize the relative position between the fixed body 31 and the coil 20, an anti-slip structure can be provided on partial surfaces of the first sub-section 311 and the second sub-section 312.

[0060] Specifically, except for the two first sub-portions 311 located at the outermost edges of the fixed body 31, the two side surfaces of each first sub-portion 311 arranged opposite to each other in the circumferential direction can respectively constitute the side walls of the fixed grooves 33 on both sides, and the partial area of ​​the side surface of the second sub-portion 312 located between the first sub-portions 311 in the radial direction X close to the core body 11 constitutes the bottom wall of the fixed groove 33. In order to increase the friction between the aforementioned side walls and bottom wall and the coil 20, an anti-slip structure can be provided on at least one of these wall portions.

[0061] Optionally, the anti-skid structure may be an uneven anti-skid pattern provided on the surface of the portion, that is, the required concave-convex structure may be formed on the surface of the fixed body 31, and the protrusions and / or recesses in these concave-convex structures may extend in a direction intersecting the axial direction Y, so as to improve the anti-skid effect of the fixed body 31 on the coil 20 in the axial direction Y. Alternatively, the anti-skid structure may also be an anti-skid pad provided on the aforementioned side wall and bottom wall area, and the anti-skid pad may be made of an insulating material with a large surface friction, such as a rubber material, and the anti-skid pad and the fixed body 31 may be connected by bonding, clamping, fasteners, etc.

[0062] In some optional embodiments, the first sub-portion 311 , the second sub-portion 312 , and the connecting portion 32 are welded and connected or integrally formed, and the connecting portion 32 is detachably connected to the core teeth 12 .

[0063] The first sub-section 311 is connected between the second sub-section 312 and the connecting section 32, and the three together constitute the fixing member 30. In order to make the fixing member 30 have a high structural strength as a whole, the first sub-section 311, the second sub-section 312 and the connecting section 32 can all be manufactured by welding connection or integral casting. At the same time, the connecting section 32 and the core tooth 12 can be detachably connected, for example, by fasteners such as bolts and nuts.

[0064] Optionally, a screw hole may be provided on one side surface of the core tooth 12 in the axial direction Y, and in the radial direction X, the spacing between the screw hole and the end of the core tooth 12 away from the core body 11 may be 10 mm to 20 mm, and the specific value may be adjusted accordingly according to the size of the core tooth 12 and the coil 20. A connecting hole may be provided on the connecting portion 32 corresponding to the aforementioned screw hole, so that the fastener passes through the connecting hole and the screw hole at the same time to realize the detachable connection between the fixing member 30 and the core 10.

[0065] In some optional embodiments, in the radial direction X, the extension dimensions of the first sub-portion 311 and the second sub-portion 312 are both 5 mm to 10 mm.

[0066] The first sub-section 311 in the embodiment of the present application is used for connection, and the second sub-section 312 is used for limiting the coil 20, so both need to have a certain structural strength. The cross-sectional figures formed by the first sub-section 311 and the second sub-section 312 in the cross-section perpendicular to their own extension direction can be rectangular, and the two opposite sides of the rectangle can be parallel to the axial direction Y. On this basis, the extension dimensions of the first sub-section 311 and the second sub-section 312 in the radial direction X can be 5mm to 10mm, so that both have the required structural strength and occupy a small space.

[0067] Optionally, the second sub-section 312 needs to take into account the support and limitation of the coil 20 in both the axial direction Y and the radial direction X, so the extension dimension of the second sub-section 312 can be larger than the extension dimension of the first sub-section 311, and the cross-sectional area of ​​the second sub-section 312 can also be larger than the cross-sectional area of ​​the first sub-section 311.

[0068] In some optional embodiments, the winding assembly 100 includes a plurality of fixing members 30, and the plurality of fixing members 30 include a first fixing group and a second fixing group respectively arranged on opposite sides of the iron core 10 in the axial direction Y, and the plurality of fixing members 30 in the first fixing group and the plurality of fixing members 30 in the second fixing group are respectively arranged in sequence in the circumferential direction, and the plurality of fixing members 30 have the same extension dimensions in the circumferential direction.

[0069] The winding assembly 100 in the embodiment of the present application may be provided with a plurality of fixing members 30 at the same time, and these fixing members 30 may be divided into two groups and respectively provided on two opposite sides of the core 10 in the axial direction Y, that is, the coil 20 is fixed from both ends respectively.

[0070] Specifically, the iron core 10 and the coil 20 in the embodiment of the present application can be symmetrically arranged relative to a reference plane, and the reference plane can be perpendicular to the axial direction Y, wherein the partial section of the coil 20 located in the mounting groove 13 can also extend along the axial direction Y. On this basis, fixing members 30 can be respectively arranged at both side ends of the iron core 10 in the axial direction Y, and these fixing members 30 can fix the coil 20 from both ends, thereby improving the reliability of the fixing.

[0071] Further, the fixing members respectively arranged at both ends of the core 10 can respectively constitute a first fixing group and a second fixing group, and the multiple fixing members 30 in the two fixing groups can be arranged in sequence in the circumferential direction to form an annular fixing structure, and the adjacent fixing members 30 can be arranged in contact or spaced. Thus, the first fixing group and the second fixing group each include an annular fixing structure formed by a combination of multiple fixing members 30, and the two annular fixing structures fix the coil 20 at different positions in the axial direction Y.

[0072] Optionally, the number of fixing members 30 in the first fixing group and the second fixing group may be the same or different, and on the basis of being able to form a nearly annular fixing structure, the number of fixing members 30 may be set according to the extension size of the fixing members 30 in the circumferential direction. Alternatively, each fixing member 30 may have the same extension size in the circumferential direction, and in this case, the number of fixing members 30 in the first fixing group and the second fixing group may be the same.

[0073] Optionally, when the fixing members 30 in the first fixing group and the second fixing group are respectively arranged, the fixing members 30 in the two fixing groups can be arranged staggered with each other in the circumferential direction. Specifically, the multiple coils 20 fixed by the same fixing member 30 in the first fixing group can be separated and fixed by the multiple fixing members 30 in the second fixing group at the other opposite end, that is, the joints of the fixing members 30 on both sides are staggered with each other, thereby further improving the reliability of the fixing.

[0074] In some optional embodiments, the number of magnetic poles of the winding assembly 100 is N1, the number of fixing members 30 in the first fixing group is N2, the number of fixing members 30 in the second fixing group is N3, N1≤N2≤1.5N1, N1≤N3≤1.5N1.

[0075] In the winding assembly 100, the number of magnetic poles is related to the number of mounting slots 13. The number of magnetic poles is recorded as N1, and the number of fixing members 30 in the first fixing group and the second fixing group is recorded as N2 and N3 respectively, then N2 and N3 should be between N1 and 1.5N1. Specifically, the aforementioned annular fixing structure is composed of a plurality of fixing members 30, and the eddy current loss of the fixing members 30 can be reduced through the disconnection between the fixing members 30, and the fixing members 30 can be easily processed and transported.

[0076] It is understandable that the diameter and circumference of the core 10 are usually positively correlated with the number of magnetic poles in the motor. Therefore, in a winding assembly 100 with more magnetic poles and a larger circumference, the number of fixing members 30 can be increased so that the length of the fixing members 30 is within a certain range. Limiting the number of fixing members 30 constituting a ring to between 1 and 1.5 times the number of magnetic poles can avoid problems such as the fixing members 30 being too long and being easy to break and inconvenient to transport, and can also avoid problems such as low fixing reliability due to the fixing members 30 being too short, so that the winding assembly 100 has good reliability as a whole.

[0077] See also Figure 5 , Figure 5 1 is a partial structural diagram of a winding assembly provided by another embodiment of the present application. In some optional embodiments, the winding assembly 100 further includes an auxiliary fixing assembly 40, the auxiliary fixing assembly 40 includes a plurality of positioning posts 41 and a fixing belt 42, the positioning posts 41 are arranged protruding from the core body 11 along the axial direction Y, the plurality of positioning posts 41 are arranged on the side of the mounting groove 13 away from the fixing member 30 and are arranged at intervals in the circumferential direction, and the fixing belt 42 is arranged around two or more positioning posts 41 and the coil 20.

[0078] In order to further improve the fixing reliability of the coil 20, an auxiliary fixing assembly 40 may be provided in the winding assembly 100. The auxiliary fixing assembly 40 may include a plurality of positioning posts 41 for providing winding fulcrums and a fixing band 42 for winding reinforcement. Specifically, the positioning posts 41 protrude from one end face of the iron core body 11 in the axial direction Y and may extend a certain dimension along the axial direction Y to facilitate winding the fixing band 42 thereon. In the radial direction X, the positioning posts 41 are arranged on the side of the mounting groove 13 away from the fixing member 30, that is, the positioning posts 41 and the mounting groove 13 may be staggered in the radial direction X to reduce the influence of the positioning posts 41 on the coil 20 and avoid interference between the fixing band 42 wound thereon and the coil 20.

[0079] The positioning posts 41 may be located in the mounting groove. A plurality of positioning posts 41 may all have the same size and be equally spaced in the circumferential direction. Optionally, in the circumferential direction, more than one positioning post 41 may be provided between every two adjacent mounting grooves 13 to facilitate winding the fixing band 42 corresponding to each coil 20. Optionally, the positioning post 41 may be a columnar member welded or inserted into the iron core 10, or the positioning post 41 may be a stud threadedly connected to the iron core 10. The present application does not make a specific limitation thereto.

[0080] The fixing band 42 is a linear or strip-shaped member. The fixing band 42 surrounds at least two positioning posts 41 and at least one coil 20. By tightening the fixing band 42 to a preset length, the acting force provided by the positioning posts 41 can be used to prevent the coil 20 from moving away from the iron core body 11, so that the relative position of the coil 20 and the iron core 10 is fixed.

[0081] Optionally, in an embodiment where one positioning post 41 is provided between every two mounting grooves 13, the fixing band 42 may be arranged in one-to-one correspondence with the mounting grooves 13, so that the coil 20 in each mounting groove 13 can be assisted in fixing by the fixing band 42. At this time, each positioning post 41 is shared by the mounting grooves 13 on both sides. Alternatively, a plurality of positioning posts 41 may be provided between adjacent mounting grooves 13, thereby further improving the fixing reliability. The two positioning posts 41 and one side surface of the coil 20 may form a trapezoidal ring structure after the fixing band 42 is tightened.

[0082] Optionally, the dimension of the positioning post 41 protruding from the iron core 10 may be 5 mm to 10 mm, and the number of turns of the fixing band 42 wound around the positioning post 41 and the coil 20 may be 3 to 5 turns, making the fixing of the coil 20 stable and reliable.

[0083] It is understandable that the iron core 10 provided in the embodiment of the present application may have different structural forms. For example, the iron core 10 may be composed of a plurality of punching sheets 14 stacked in sequence, and these punching sheets 14 may be made of materials such as silicon steel and have a thin thickness, which may be less than 1 mm. Alternatively, the iron core 10 may also include punching sheets 14 and tooth pressure plates 15 at the same time, wherein the tooth pressure plates 15 are respectively arranged on both sides of the stacked punching sheets 14 in the axial direction, and the thickness of the tooth pressure plates 15 may be selected to be 5 mm to 10 mm. By providing the tooth pressure plates 15, the punching sheets 14 can be made smoother.

[0084] On this basis, in the embodiment where the core 10 does not include the tooth pressure plate 15, the fixing member 30 and the positioning column 41 in the auxiliary fixing assembly 40 can be directly arranged on the punching sheet 14; in the embodiment where the core 10 includes the tooth pressure plate 15, the fixing member 30 and the positioning column 41 can both be connected to the tooth pressure plate 15. In the embodiments and drawings of the present application, the core 10 including the tooth pressure plate 15 is used as an example for explanation, but it should be understood that the present application is not limited to this, and can also be applied to the core 10 with other laminated structures, and provide corresponding protection.

[0085] In some optional embodiments, the coil 20 extends in a ring shape, and the coil 20 includes a coil body 21 extending along the axial direction Y and a bending portion 22 connected to the coil body 21. In the axial direction Y, the coil body 21 at least partially protrudes from the iron core 10, and the fixing band 42 abuts against the area where the coil body 21 protrudes from the iron core 10.

[0086] The coil 20 in the embodiment of the present application may be roughly annular, and the annular structure may include a coil body 21 extending in a straight line through the mounting groove 13, and a bending portion 22 connected between the coil bodies 21. It is understandable that the two coil bodies 21 connected by the same bending portion 22 may be respectively arranged in different mounting grooves 13, that is, the two coil bodies 21 in the same mounting groove 13 may belong to two different coils 20. At the same time, the extension dimension of the coil body 21 in the axial direction Y may be greater than the extension dimension of the iron core 10 in this direction, so that at least one of the two side ends of the coil body 21 protrudes from the iron core 10, that is, protrudes from the mounting groove 13.

[0087] On this basis, the plane where the fixing belt 42 is located after being tightened can be perpendicular to the axial direction Y, and it can abut against the partial section of the coil body 21 protruding from the mounting groove 13. In this way, the position where the fixing belt 42 abuts against the coil 20 can be stable and not easy to slide, and the fixing belt 42 can maintain an angle that is convenient for applying force, thereby further improving the stability and reliability of fixing the coil 20.

[0088] In some optional embodiments, in the radial direction X, the extension dimension of the mounting groove 13 is L1, the extension dimension of the fixing belt 42 is L2, and 0.8L1≤L2≤1.2L1.

[0089] The fixing band 42 in the embodiment of the present application surrounds the positioning column 41 and the coil 20, so that the extension size of the fixing band 42 in the radial direction X is determined by the position of the coil 20 and the position of the positioning column 41. Specifically, in the radial direction X, the extension size of the fixing band 42 is the distance between the side surface of the coil 20 facing away from the core body 11 and the positioning column 41 in this direction, and the distance can be the same as or similar to the depth of the mounting groove 13.

[0090] Furthermore, the depth of the mounting groove 13 refers to the extension dimension of the mounting groove 13 in the radial direction X, and this dimension is L1. At the same time, the extension dimension of the aforementioned fixing belt 42 in this direction is recorded as L2, then L2 can be 0.8 times to 1.2 times of L1, wherein the positioning column 41 is located on the side of the bottom of the mounting groove 13 close to the core body 11, and the surface of the coil 20 is located on the side of the notch of the mounting groove 13 close to the core body 11, and the two are staggered with each other, thereby facilitating the setting of the position of the positioning column 41 and improving the accuracy of positioning the setting position of the coil 20.

[0091] In some optional embodiments, the fixing strap 42 includes at least one of nylon and polyester fibers.

[0092] The fixing belt in the embodiment of the present application is at least partially connected to the coil 20. During operation, heat may be concentrated and the temperature may rise at the coil 20. Therefore, the fixing belt 42 may be made of a high-temperature resistant insulating material, such as nylon or polyester fiber, and may be a woven belt structure to have good structural strength. Nylon and polyester fibers have good insulation properties, are easy to prepare, and have low cost.

[0093] In some optional embodiments, two side walls of the mounting groove 13 that are opposite to each other in the circumferential direction are arranged parallel to each other, and a cross-sectional shape formed by the mounting groove 13 in a cross section perpendicular to the axial direction Y is a rectangle.

[0094] The winding assembly 100 in the embodiment of the present application fixes the coil 20 by means of the fixing member 30, thereby eliminating the original slot wedge structure. On this basis, the shape of the mounting slot 13 can be adjusted accordingly so that the side walls opposite to each other in the circumferential direction, that is, the side walls formed by the side surfaces of the core teeth 12, are arranged parallel to each other, especially at the slot position close to the fixing member 30, so that the mounting slot 13 forms a parallel slot structure, thereby further reducing the magnetic resistance and reducing vibration noise.

[0095] Furthermore, the cross-sectional shape of the mounting groove 13 can be adapted to the size and shape of the coil 20. To facilitate processing, the cross-sectional shape formed by the mounting groove 13 in the cross section perpendicular to the axial direction Y can be a rectangle, and the length of the rectangle should be greater than the width of the coil 20 so that the coil 20 can be accommodated therein.

[0096] It is understandable that in the embodiment where the core 10 includes the punching sheet 14 and the tooth pressure plate 15, the installation groove 13 in the partial section of the punching sheet 14 can be a rectangular groove with two side walls strictly parallel to each other, and the notch position of the installation groove 13 in the partial section of the tooth pressure plate 15 can also have a certain curvature. Specifically, Figure 4 and Figure 5 As shown, the portion of the core tooth 12 formed by the tooth pressure plate 15 may be partially in the shape of an arc with a gradually decreasing width at the tip, so as to further reduce the influence on the air gap.

[0097] In a second aspect, according to an embodiment of the present application, a generator is proposed, including a stator and a rotor, wherein the rotor and the stator are coaxially arranged and rotationally matched, and at least one of the stator and the rotor includes the winding assembly 100 in any embodiment of the first aspect.

[0098] The embodiment of the present application also provides a generator, which includes a stator and a rotor that are coaxially arranged and rotated with each other, and at least one of the stator and the rotor includes the aforementioned winding assembly 100. It can be understood that the generator can have a variety of different structural forms. Taking the stator provided with the winding assembly 100 as an example, in the embodiment in which the rotor is arranged in the stator, the notch of the installation slot 13 is arranged inwardly, and the fixing member 30 is located on the inner side of the coil 20 in the radial direction X; in the embodiment in which the stator is arranged in the rotor, the notch of the installation slot 13 is arranged outwardly, and the fixing member 30 is located on the outer side of the coil 20 in the radial direction X. The present application does not make a specific limitation on this, and it can be designed according to actual use requirements.

[0099] In a third aspect, according to an embodiment of the present application, a wind turbine generator set is proposed, comprising the generator in any embodiment of the second aspect.

[0100] The generator and wind turbine generator set provided in the embodiments of the present application have all the beneficial effects of the winding assembly 100 provided in the embodiments of the present application. For details, please refer to the specific description of the winding assembly 100 in the above embodiments, which will not be repeated in this embodiment.

[0101] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A winding assembly, It is characterized in that include: An iron core, comprising an iron core body and iron core teeth protruding from the iron core body in the radial direction of the winding assembly, wherein a plurality of the iron core teeth are arranged at intervals along the circumferential direction of the winding assembly, and mounting grooves are formed between adjacent iron core teeth; Coils, a plurality of the coils are respectively arranged in the mounting slots, and the coils at least partially extend along the axial direction of the winding assembly and pass through the mounting slots; The fixing part includes a fixing body and a plurality of connecting parts which are connected to each other. The connecting part is connected to an end of the core tooth away from the core body. The fixing body extends along the circumferential direction and is provided with a plurality of fixing grooves at intervals. In the radial direction, the fixing grooves are arranged corresponding to the mounting grooves and are connected to each other.

2. The winding assembly according to claim 1, It is characterized in that The fixing body includes a plurality of first sub-parts and a second sub-part, the first sub-part is connected between the second sub-part and the connecting part, the second sub-part is arc-shaped and extends along the circumferential direction, the plurality of first sub-parts are arranged at intervals along the circumferential direction and correspond one to one with the connecting part, and the mounting groove is formed between adjacent first sub-parts.

3. The winding assembly according to claim 2, It is characterized in that The first sub-portion is arranged to protrude from the connecting portion along the axial direction, and in the radial direction, the orthographic projection of the second sub-portion and the orthographic projection of the connecting portion are at least partially offset from each other.

4. The winding assembly according to claim 3, It is characterized in that At least part of the two side surfaces of the first sub-part that are arranged opposite to each other in the circumferential direction and the one side surface of the second sub-part that is close to the coil are provided with anti-slip grooves.

5. The winding assembly according to claim 2, It is characterized in that The first sub-section, the second sub-section and the connecting portion are welded and connected or integrally formed, and the connecting portion is detachably connected to the core teeth.

6. The winding assembly according to claim 2, It is characterized in that In the radial direction, the extension dimensions of the first sub-portion and the second sub-portion are both 5 mm to 10 mm.

7. The winding assembly according to claim 1, It is characterized in that The winding assembly includes a plurality of fixing parts, and the plurality of fixing parts include a first fixing group and a second fixing group respectively arranged on opposite sides of the iron core in the axial direction, the plurality of fixing parts in the first fixing group and the plurality of fixing parts in the second fixing group are respectively arranged in sequence in the circumferential direction, and the extension dimensions of the plurality of fixing parts in the circumferential direction are the same.

8. The winding assembly according to claim 7, It is characterized in that The number of magnetic poles of the winding assembly is N1, the number of the fixing members in the first fixing group is N2, the number of the fixing members in the second fixing group is N3, N1≤N2≤1.5N1, N1≤N3≤1.5N1.

9. The winding assembly according to claim 1, It is characterized in that The winding assembly also includes an auxiliary fixing component, which includes a plurality of positioning columns and a fixing belt. The positioning columns are arranged to protrude from the core body along the axial direction. The plurality of positioning columns are arranged on the side of the mounting groove away from the fixing member and are arranged at intervals in the circumferential direction. The fixing belt is arranged around two or more positioning columns and the coil.

10. The winding assembly according to claim 9, It is characterized in that The coil extends in a ring shape, and includes a coil body extending along the axial direction and a bending portion connected between the coil bodies. In the axial direction, the coil body at least partially protrudes from the iron core, and the fixing belt abuts against the area of ​​the coil body protruding from the iron core.

11. The winding assembly according to claim 9, It is characterized in that The fixing belt includes at least one of nylon and polyester fibers.

12. The winding assembly according to claim 1, It is characterized in that The two side walls of the installation groove that are opposite to each other in the circumferential direction are arranged parallel to each other, and the cross-sectional shape formed by the installation groove in the cross-section perpendicular to the axial direction is a rectangle.

13. A generator, It is characterized in that include: stator; The rotor is coaxially arranged with the stator and rotatably matched, and at least one of the stator and the rotor comprises a winding assembly as claimed in any one of claims 1 to 12.

14. A wind turbine generator set, It is characterized in that Comprising the generator as claimed in claim 13.

Images