A wind wheel

Abstract

The utility model provides a kind of wind wheel, including wind wheel ring, middle disc and shaft sleeve. Middle disc is annular structure, coaxial connection is in wind wheel ring;Shaft sleeve includes the sleeve main body with shaft hole and the sleeve disc of coaxial integrated molding. Center ring groove for accommodating sleeve disc is equipped on middle disc, a plurality of circumferential uniform distribution's flanging hole is integrally formed in groove bottom or sleeve disc, and matching perforation is equipped on the other corresponding component. Flanging hole is fixed after passing through perforation by riveting pressure, realize the reliable connection of shaft sleeve and middle disc. The structure omits traditional pin parts, simplifies assembly, reduces cost, improves coaxiality and dynamic balance performance.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine technology, and more specifically, to a wind turbine. Background Technology

[0002] In the wind turbine industry, the wind turbine rotor, as a core component for energy conversion, directly affects the overall operating efficiency and market competitiveness of the turbine through its structural stability and assembly economy. In existing wind turbine structures, the connection between the rotor disc and the bushing commonly uses a pin connection method, but this connection structure has problems in practical applications.

[0003] First, it significantly increases the complexity of the structure and the number of parts. The rotor, bushing, and pins are all independent components, requiring separate manufacturing and demanding high levels of expertise in processing equipment and operation. Even minor misalignment can affect the dynamic balance of the entire rotor. Second, during assembly, the bushing needs to be aligned with the rotor before the pins are pressed in, adding a pin-setting step and resulting in low assembly efficiency, hindering the implementation of automated production lines. More importantly, these additional processing steps and independent connectors directly increase raw material and processing costs, while also increasing maintenance costs. Therefore, this traditional pin-connection method has become a key factor restricting further cost reduction and efficiency improvement in wind turbine products, urgently requiring a new connection solution that is more efficient to install and lower in cost. Utility Model Content

[0004] This application mainly addresses the problems of numerous parts, complex assembly, and high cost associated with the existing wind turbine's disc and bushing connection using pins. To overcome the above-mentioned defects of the prior art, this application provides a wind turbine.

[0005] This application provides a wind turbine, comprising: Wind turbine ring; The middle disk has a ring structure and is coaxially connected to the inside of the impeller ring; A bushing, comprising a bushing body and a bushing disc, wherein the bushing body has a central shaft hole and the bushing disc is coaxially and integrally formed on the bushing body; The middle plate is provided with a central annular groove for the coaxial insertion of the sleeve plate; The bottom of the central annular groove has multiple circumferentially distributed flanging holes for riveting integrally formed. The sleeve has multiple through holes that match the flanging holes. The free end of the flanging hole passes through the through hole and is riveted to press the flanging hole onto the sleeve, thereby fixing the bushing onto the middle plate. Alternatively, the sleeve has multiple circumferentially distributed flanging holes for riveting integrally formed. The bottom of the central annular groove has multiple through holes that match the flanging holes. The free end of the flanging hole passes through the through hole and is riveted to press the flanging hole onto the middle plate, thereby fixing the bushing onto the middle plate.

[0006] Compared with existing technologies, the wind turbine proposed in this application has the following advantages: First, it significantly simplifies the structure and reduces costs. By integrally forming flanged holes on the middle plate or bushing and then riveting them together with the corresponding perforations on the components, separate pin parts are eliminated, reducing the number of parts and processing steps. This lowers raw material costs, processing complexity, and storage management costs, while avoiding the centering deviation problem in traditional pin assembly, improving assembly efficiency, and facilitating automated production. Second, it improves the wind turbine's operational stability and dynamic balance performance. The circumferentially distributed flanged hole design, combined with the coaxial positioning of the central annular groove, ensures the alignment between the middle plate and the bushing, reducing vibration and noise caused by assembly errors. The integral forming of the bushing and the bushing body further ensures coaxiality, giving the wind turbine better dynamic balance at high speeds and adapting to harsh operating conditions. In summary, this riveting connection method achieves comprehensive improvements in reducing parts, optimizing assembly, enhancing stability, and facilitating maintenance, effectively solving the problems of numerous parts, complex assembly, and high costs in existing technologies.

[0007] In one possible implementation, the sleeve disc and the sleeve body are integrally formed metal structures. Metal itself is highly rigid, and the integral forming eliminates assembly gaps between the sleeve disc and the sleeve body, significantly improving overall fatigue and impact resistance, enabling it to adapt to the high-speed operation of the wind turbine. The elimination of the need to separately process the sleeve disc and sleeve body before assembly reduces processing steps and assembly errors, improving production efficiency. The integral forming structure naturally ensures the coaxiality of the sleeve disc and sleeve body, further optimizing the dynamic balance performance of the wind turbine and reducing vibration and noise during operation.

[0008] In one possible implementation, the sleeve is provided with multiple circumferentially distributed reinforcing ribs. The reinforcing ribs effectively improve the structural strength and deformation resistance of the sleeve, prevent the sleeve from twisting due to centrifugal force during wind turbine operation, and ensure connection stability; the reasonable distribution of reinforcing ribs can reduce unnecessary material usage of the sleeve, achieve wind turbine lightweighting while ensuring strength, and improve wind turbine operating efficiency.

[0009] In one possible implementation, the central disk is provided with multiple ventilation holes, which are evenly distributed around the circumference of the central disk. The ventilation holes allow airflow to pass smoothly through the central disk, reducing air resistance during rotor rotation and improving rotor energy conversion efficiency; the even circumferential distribution of the ventilation holes prevents operational vibrations caused by structural asymmetry of the central disk, ensuring rotor dynamic balance.

[0010] In one possible implementation, the outer peripheral edge of the central disk is provided with multiple slots for connecting the wind turbine ring. The slots can position and guide the wind turbine ring, enabling the wind turbine ring to quickly align with the central disk, reducing assembly and alignment time. At the same time, the slot connection makes disassembly easier, reducing the difficulty of subsequent wind turbine maintenance and wind turbine ring replacement. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of Example 1. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of Example 1. Figure 2 ; Figure 3 This is a cross-sectional view of Example 1; Figure 4 A partial enlargement of Example 1 Figure 1 (Before riveting and punching); Figure 5 A partial enlargement of Example 1 Figure 2 (After drilling and riveting); Figure 6 This is a schematic diagram of the mid-plate structure in Example 1; Figure 7 This is a schematic diagram of the bushing structure in Embodiment 1; Explanation of reference numerals in the attached figures: 1. Wind turbine ring; 2. Middle plate; 21. Central ring groove; 22. Flanged hole; 23. Ventilation hole; 24. Slot; 3. Bushing; 31. Sleeve disc; 311. Through hole; 312. Reinforcing rib; 32. Main body. Detailed Implementation

[0012] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0013] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0014] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0015] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Example 1 See Figures 1 to 7 This application discloses a wind turbine, including: a wind turbine ring 1, a central disc 2, and a bushing 3.

[0017] The wind turbine ring 1 is made of high-strength lightweight alloy material to balance structural strength and lightweight operation requirements.

[0018] The middle plate 2 is a one-piece ring structure made of high-strength metal sheet; the middle plate 2 is coaxially connected inside the impeller ring 1.

[0019] The bushing 3 includes a bushing body 32 and a bushing disc 31. The central shaft hole of the bushing body 32 is designed according to the outer diameter of the rotating shaft to ensure a tight fit with the rotating shaft. The bushing disc 31 has a disc structure and is coaxially and integrally formed on the bushing body 32.

[0020] A central annular groove 21 is formed on the inner end face of the middle plate 2. The groove depth is the same as the thickness of the sleeve plate 31, and the groove diameter is adapted to the diameter of the sleeve plate 31, ensuring that the sleeve plate 31 can be smoothly placed into the central annular groove 21. Multiple flip holes 22 are integrally formed on the bottom of the central annular groove 21. The number of flip holes 22 is set to six, which are evenly distributed at equal angles along the circumference of the bottom of the groove. The height of the flip holes 22 is greater than the thickness of the sleeve plate 31.

[0021] The sleeve 31 has multiple through holes 311 that match the flip holes 22. The diameter of the through holes 311 is slightly larger than the diameter of the flip holes 22 to achieve a fit, facilitating the quick passage and easy positioning of the flip holes 22. After the end of the flip hole 22 away from the middle plate 2 passes through the through holes 311, it is axially compressed using a special riveting device, causing plastic deformation at the end of the flip hole 22. The flip hole 22 is pressed tightly against the outer surface of the sleeve 31, ensuring that the sleeve 31 is firmly fixed in the central annular groove 21 without axial displacement.

[0022] In this embodiment, the sleeve 31 and the sleeve body 32 are integrally formed metal structures. The integrally formed structure completely eliminates the assembly gap between the sleeve 31 and the sleeve body 32, making the overall coaxiality error of the bushing 3 controllable, and reducing vibration caused by the gap when the impeller rotates at high speed.

[0023] In this embodiment, the sleeve 31 is provided with multiple circumferentially distributed reinforcing ribs 312. The reinforcing ribs 312 are radially extending strip-shaped protrusions, integrally formed with the sleeve 31, which both improves strength and avoids stress concentration. The number of reinforcing ribs 312 is the same as the number of perforations 311, and they are evenly distributed at equal angles along the circumference of the sleeve 31. The perforations 311 are located between adjacent reinforcing ribs 312 to ensure balanced stress distribution. While improving the deformation resistance of the sleeve 31, the reinforcing ribs 312 reduce the material usage of the main body of the sleeve 31. Compared to a sleeve 31 without reinforcing ribs 312, material consumption is reduced, achieving a lightweight wind turbine.

[0024] In this embodiment, the middle plate 2 is provided with multiple ventilation holes 23, which are evenly distributed around the circumference of the middle plate 2 and are manufactured by stamping. The ventilation holes 23 allow airflow to pass smoothly through the middle plate 2, reduce air turbulence when the wind turbine rotates, and optimize the dynamic balance of the wind turbine.

[0025] In this embodiment, a plurality of slots 24 for connecting the impeller ring 1 are provided on the outer peripheral edge of the middle plate 2, so as to realize the quick positioning and installation of the impeller ring 1.

[0026] The beneficial effects of this application include: I. Simplified structure reduces costs and increases efficiency: The traditional pin connection is replaced by the method of using the combination of the flip hole 22 and the through hole 311 and then fixing by riveting. This eliminates the need for independent pin components, reduces the complexity of parts processing and storage management costs, eliminates the pin pressing process, facilitates automated assembly, and improves production efficiency.

[0027] II. Improved operational stability: The central plate 2 and the bushing 3 are coaxially positioned through the central annular groove 21, and the circumferentially distributed flip holes 22 reduce the centering deviation problem of traditional connections and optimize the dynamic balance of the impeller; the bushing 31 and the bushing body 32 are integrally formed of metal to ensure coaxiality, reduce vibration and noise, and adapt to high-speed operating conditions.

[0028] III. Optimize details to enhance performance: The design of the flip hole 22 reduces the difficulty and damage of riveting, and also provides ventilation and reduces resistance; the reinforcing rib 312 increases the strength of the sleeve 31 and achieves lightweighting, and the ventilation hole 23 reduces air resistance.

[0029] IV. Convenient maintenance and reduced costs: The 2 slots 24 in the middle plate enable quick connection of the impeller ring 1, making disassembly simple and reducing the difficulty of inspection and replacement; the overall processing, assembly and maintenance procedures are reduced, effectively reducing the cost of raw materials and subsequent maintenance.

[0030] Example 2 The difference between this embodiment and embodiment one is that the sleeve has multiple circumferentially distributed flip holes for riveting integrally formed. Multiple through holes matching the flip holes are opened on the bottom of the central annular groove. The free end of the flip hole passes through the through hole and is riveted to press the flip hole onto the middle plate, which is used to fix the bushing onto the middle plate.

[0031] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0032] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wind turbine, characterized in that, include: Wind turbine ring; The middle disk has a ring structure and is coaxially connected to the inside of the impeller ring; A bushing, comprising a bushing body and a bushing disc, wherein the bushing body has a central shaft hole and the bushing disc is coaxially and integrally formed on the bushing body; The middle plate is provided with a central annular groove for the coaxial insertion of the sleeve plate; The bottom of the central annular groove has multiple circumferentially distributed flanging holes for riveting integrally formed. The sleeve has multiple through holes that match the flanging holes. The free end of the flanging hole passes through the through hole and is riveted to press the flanging hole onto the sleeve, thereby fixing the bushing onto the middle plate. Alternatively, the sleeve has multiple circumferentially distributed flanging holes for riveting integrally formed. The bottom of the central annular groove has multiple through holes that match the flanging holes. The free end of the flanging hole passes through the through hole and is riveted to press the flanging hole onto the middle plate, thereby fixing the bushing onto the middle plate.

2. The wind turbine according to claim 1, characterized in that, The sleeve is provided with multiple reinforcing ribs evenly distributed around its circumference.

3. The wind turbine according to claim 1, characterized in that, The central plate is provided with multiple ventilation holes, which are evenly distributed around the circumference of the central plate.

4. The wind turbine according to claim 1, characterized in that, The outer periphery of the middle plate is provided with multiple slots for connecting the impeller ring.

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