A lightweight hollow structure for a wind turbine stator core

Abstract

This utility model discloses a hollow weight-reduction structure for a lightweight fan stator core, belonging to the technical field of motor stator cores. It includes a main body with a hollow weight-reduction mechanism on its inner wall. This mechanism includes an inner core ring, with winding grooves on its inner walls. The lightweight fan stator core is composed of an outer core frame and an inner core ring. The winding grooves distributed in a ring around the inner wall of the inner core ring help stabilize the coil windings. The stator gear frame has an inner hollow groove structure at its center, which, together with multiple sets of stator gear frames arranged in a ring, significantly reduces its own weight. This reduces the internal weight of the fan, improving lightweight design. Although the stator is a stationary component, its weight reduction directly leads to a decrease in the overall rotational inertia of the motor. Lower rotational inertia means faster motor start-up, acceleration, deceleration, and reversal, resulting in better dynamic response performance.

Description

Technical Field

[0001] This utility model relates to the field of motor stator core technology, specifically a hollow weight-reducing structure for a lightweight fan stator core. Background Technology

[0002] Lightweight wind turbines refer to the design and manufacturing direction of wind turbine generator sets, especially key components such as blades, casings, and stators, which significantly reduce the weight of wind turbine generator sets, while ensuring structural strength, operational reliability, and power generation performance, through the application of new materials, new designs, and new processes. It is crucial to maintain or enhance electromagnetic performance, such as generating magnetic fields and realizing electromechanical energy conversion, while minimizing weight. This is essential for reducing the overall weight, lowering costs, and improving efficiency and reliability of wind turbines. As one of the structural components of lightweight wind turbines, the stator core is the core component of the stator. It is composed of stacked high-permeability silicon steel sheets. It is not a solid iron block, but a whole cylindrical or polygonal structure made up of a large number of thin sheets stamped into specific shapes, which are then insulated and tightly stacked.

[0003] The aforementioned stator core is composed of stacked high-permeability silicon steel sheets. Although it is not a solid structure, its overall weight is still relatively high among motor structures. This excessive weight will bring many significant drawbacks to the fan, especially such fans with high requirements for lightweighting, affecting performance, efficiency and reliability. Furthermore, the fan's start-up and speed regulation response will be slower, which is unfavorable for fans that need to respond quickly to changes in wind speed. Therefore, we propose a hollowed-out weight-reducing structure for a lightweight fan stator core. Utility Model Content

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] The purpose of this invention is to provide a lightweight hollow structure for the stator core of a wind turbine to reduce weight, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lightweight fan stator core hollow weight-reduction structure, comprising a main body, wherein a hollow weight-reduction mechanism is provided on the inner wall of the main body, the hollow weight-reduction mechanism includes an inner core ring, a winding groove is provided on the inner wall around the inner core ring, stator gear frames are symmetrically distributed on both sides of the winding groove, an inner hollow groove is provided in the center of the stator gear frame, a T-shaped tooth head is fixed at the end of the stator gear frame, an arc surface protrudes outward from the middle of the bottom end of the T-shaped tooth head, and inner arc grooves are distributed on both sides of the arc surface.

[0007] Furthermore, the inner core ring is evenly distributed around the inner wall of the main body, and the stator gear frame and winding groove are arranged equidistantly in a ring around the inner wall of the inner core ring.

[0008] Furthermore, the winding groove is formed by the gap between the two symmetrical stator gear frames, and the winding groove is in the shape of an inverted trapezoid.

[0009] Furthermore, the T-shaped tooth is fixedly connected to the inner wall of the inner core ring via the stator gear frame, and both the stator gear frame and the inner core ring are made of high-permeability silicon steel sheet.

[0010] Furthermore, the T-shaped tooth is fixedly connected to the inner wall of the inner core ring via the stator gear frame, and both the stator gear frame and the inner core ring are made of high-permeability silicon steel sheet.

[0011] Furthermore, the main body includes an outer iron core frame, and outer iron core ring plates are arranged and stacked inside the outer iron core frame. The outer iron core ring plates have external hollow holes inside. The external hollow holes and internal hollow grooves are arranged around the center of the outer iron core frame. The outer walls on both sides of the outer iron core frame are fitted with external fitting rings.

[0012] Furthermore, the perforated holes are equidistantly spaced in a ring around the inner perimeter of the outer iron core ring, and the outer iron core rings are stacked and fixed together.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The lightweight fan stator core consists of an outer core frame and an inner core ring. The winding slots distributed in a ring around the inner wall of the inner core ring help stabilize the coil windings. The stator gear frame has an inner hollow slot structure in its center, which, together with multiple sets of stator gear frames arranged in a ring, can greatly reduce its own weight. This reduces the internal weight of the fan and improves its lightweight design. Although the stator is a stationary component, its weight reduction directly leads to a reduction in the overall rotational inertia of the motor. Lower rotational inertia means that the motor can start, accelerate, decelerate, and reverse faster, resulting in better dynamic response performance.

[0015] The winding slots of this lightweight fan stator core are formed by the gap between the two stator tooth frames. After the winding assembly, the inverted trapezoidal structure can prevent the coil from coming out, improving structural stability. In addition, the bottom of the T-shaped tooth head, combined with the arc surface and inner arc groove structure, can bevel the inner ring of the stator core, thereby reducing the harmonic content of the fan winding magnetomotive force, which reduces the torque pulsation of the motor and also plays an auxiliary role in noise reduction.

[0016] The lightweight fan stator core has external perforations around each set of outer core rings, which can reduce the weight of the core. At the same time, external bonding rings are attached and fixed to the outer walls on both sides of the outer core frame. In addition, the bonding rings have no perforations and can seal at both ends of the main body, thereby preventing air from entering through the perforations during rotation and affecting the operating efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the main body of this utility model;

[0018] Figure 2 This is a front view structural diagram of the main body of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the stator gear frame of this utility model;

[0020] Figure 4 This is a front view of the stator gear frame of this utility model.

[0021] In the diagram: 1. Main body; 101. Outer core frame; 102. Outer core ring; 103. Outer hollow hole; 104. Outer fitting ring; 2. Hollowed-out weight reduction mechanism; 201. Inner core ring; 202. Winding groove; 203. Stator gear frame; 204. Inner hollow groove; 205. T-shaped tooth head; 206. Arc surface; 207. Inner arc groove. Detailed Implementation

[0022] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0023] It should also be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0024] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0025] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0026] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] This utility model provides, for example Figure 1-4 The lightweight fan stator core hollow weight reduction structure shown includes a main body 1. The inner wall of the main body 1 is provided with a hollow weight reduction mechanism 2. The main body 1 includes an outer core frame 101. The inner wall of the outer core frame 101 is arranged and stacked with outer core ring plates 102. The inner wall of the outer core ring plates 102 is provided with an outer hollow hole 103. The outer hollow hole 103 and the inner hollow groove 204 are arranged around the center of the outer core frame 101. The outer walls on both sides of the outer core frame 101 are fitted with outer fitting rings 104.

[0028] To ensure the stable operation of this lightweight fan stator core during use, such as... Figure 1 As shown, the lightweight fan stator core is formed by stacking and fixing multiple sets of outer core ring plates 102 together to form an integral outer core frame 101. Each set of outer core ring plates 102 has an outer perforation hole 103 around it, which can provide weight reduction to the outside of the core. At the same time, outer fitting rings 104 are attached and fixed to the outer walls on both sides of the outer core frame 101. In addition, the fitting rings 104 have no perforation structure and can play a sealing role at both ends of the main body 1, thereby preventing air from entering through the perforation position during rotation and affecting the operating efficiency.

[0029] like Figure 2-4 As shown, the hollow weight reduction mechanism 2 includes an inner iron core ring 201. The inner walls of the inner iron core ring 201 are provided with winding grooves 202. Stator gear frames 203 are symmetrically distributed on both sides of the winding grooves 202. An inner hollow groove 204 is provided in the center of the stator gear frame 203. A T-shaped tooth head 205 is fixed at the end of the stator gear frame 203. A circular arc surface 206 protrudes outward from the middle of the bottom end of the T-shaped tooth head 205. Inner arc grooves 207 are distributed on both sides of the circular arc surface 206.

[0030] To further improve the overall weight reduction of the wind turbine, thereby increasing its efficiency and response speed, such as... Figure 2-4 As shown, this lightweight fan stator core consists of an outer core frame 101 and an inner core ring 201. The winding grooves 202 distributed in a ring around the inner wall of the inner core ring 201 can help stabilize the coil windings. The stator gear frame 203 has an inner hollow groove 204 structure in its center. It can work with multiple sets of stator gear frames 203 to greatly reduce its own weight, thereby reducing the internal weight of the fan and improving lightweight. Although the stator is a stationary component, its weight reduction will directly lead to a reduction in the overall rotational inertia of the motor. A lower rotational inertia means that the motor can start, accelerate, decelerate and reverse faster, and has better dynamic response performance.

[0031] The aforementioned winding groove 202 is formed by the interval between the two stator tooth frames 203. After the winding assembly, the inverted trapezoidal structure can prevent the coil from coming out, improve structural stability, and the bottom end of the T-shaped tooth head 205, together with the arc surface 206 and the inner arc groove 207 structure, can bevel the inner ring of the stator core, thereby reducing the harmonic content of the wind turbine winding magnetomotive force, thus reducing the torque pulsation of the motor, and also playing an auxiliary role in noise reduction.

[0032] In summary, when using this lightweight fan stator core, the outer core rings 102 are first stacked and fixed together to form an outer core frame 101. Then, the outer fitting rings 104 are attached and fixed along the outer walls on both sides of the outer core frame 101 to form an integral core. The winding is formed by the winding grooves 202 around the inner wall of the inner core ring 201. Then it can be put into use in the fan. During operation, the weight reduction process is provided by the outer hollow holes 103 and the inner hollow grooves 204.

[0033] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in the embodiments of this disclosure is not limited to the specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A lightened fan stator core with a hollowed-out weight-reducing structure, comprising a main body (1), characterized in that, The inner wall of the main body (1) is provided with a hollow weight reduction mechanism (2). The hollow weight reduction mechanism (2) includes an inner iron core ring (201). The inner wall of the inner iron core ring (201) is provided with a winding groove (202). Stator gear frame (203) is symmetrically distributed on both sides of the winding groove (202). An inner hollow groove (204) is provided in the center of the stator gear frame (203). A T-shaped tooth head (205) is fixed at the end of the stator gear frame (203). A circular arc surface (206) protrudes outward from the middle of the bottom end of the T-shaped tooth head (205). Inner arc grooves (207) are distributed on both sides of the circular arc surface (206).

2. The hollowed-out weight-reducing structure of a stator core of a light-weight fan according to claim 1, characterized by, The inner core ring (201) is evenly opened around the inner wall of the main body (1), and the stator gear frame (203) and the winding groove (202) are arranged equidistantly around the inner wall of the inner core ring (201).

3. The hollowed-out weight-reducing structure for a lightweight fan stator core according to claim 1, characterized in that, The winding groove (202) is formed by the gap between the two symmetrical stator gear frames (203) and the winding groove (202) is in the shape of an inverted trapezoid.

4. The lightweight fan stator core hollow weight-reduction structure according to claim 1, characterized in that, The T-shaped tooth (205) is fixedly connected to the inner wall of the inner iron core ring (201) through the stator tooth frame (203), and both the stator tooth frame (203) and the inner iron core ring (201) are made of high magnetic permeability silicon steel sheet.

5. The hollow weight-reducing structure for a lightweight fan stator core according to claim 1, characterized in that, The arc surface (206) is fixedly connected along the center of the bottom end of the T-shaped tooth (205), and the inner arc groove (207) is symmetrically distributed along both sides of the bottom end of the T-shaped tooth (205).

6. The hollowed-out weight-reduction structure for a lightweight fan stator core according to claim 1, characterized in that, The main body (1) includes an outer iron core frame (101), and an outer iron core ring plate (102) is arranged and stacked inside the outer iron core frame (101). An outer hollow hole (103) is opened inside the outer iron core ring plate (102). The outer hollow hole (103) and the inner hollow groove (204) are arranged around the center of the outer iron core frame (101). An outer fitting ring (104) is attached to the outer walls on both sides of the outer iron core frame (101).

7. The lightweight fan stator core hollow weight-reduction structure according to claim 6, characterized in that, The perforated holes (103) are opened in a ring at equal intervals around the inside of the outer iron core ring (102), and the outer iron core rings (102) are stacked and fixed together.

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