A wind turbine generator speed reducer stiffness reinforcing device

Abstract

The utility model discloses a kind of wind turbine reducer rigidity reinforcing devices, including rack, at least two yaw reducers are equipped on the rack, and all adjacent yaw reducers are connected by first connecting plate. First reinforcing plate connects multiple reducers as a whole, converts partial load into system load, disperses each stress transmission to the reducer matrix on entire circumference, reduces the stress of single ear plate connecting place. At the same time, the displacement and movement of yaw system components are also constrained by second reinforcing plate, the inherent frequency of system is improved, so that the response of yaw system to dynamic load is more stable. The scheme greatly enhances the structural rigidity of yaw system, so that the deformation is greatly reduced.

Description

Technical Field

[0001] This utility model relates to a stiffness enhancement device for a wind turbine reducer, belonging to the technical field of wind turbine yaw system. Background Technology

[0002] To maximize wind energy conversion efficiency, wind turbines require continuous adjustment of the nacelle's angle to the wind. The yaw system is a crucial component for achieving this function. Its main principle is that the yaw reducer drives the yaw bearing to rotate the nacelle, ensuring the rotor always faces the wind direction. Therefore, the safe and stable operation of the yaw system plays a vital role in ensuring power generation efficiency, stable power output, and protecting the turbine's structural safety.

[0003] However, significant deformation of the yaw system components can severely disrupt the stability and alignment of the entire wind turbine, leading to excessive yaw motor load, sluggish yaw action, and even gear breakage in the reducer causing yaw failure. This results in power generation loss, abnormal vibration, and additional loads on the drivetrain. In severe cases, it can cause safety hazards and substantial economic losses.

[0004] Currently, the main methods to improve the deformation problem of the yaw system are to strengthen the frame structure itself or directly replace the gearbox. However, the effect of controlling deformation is limited, the economic cost is high, and maintenance is inconvenient, so the technology and economy are still lacking. Utility Model Content

[0005] The purpose of this utility model is to provide a device for strengthening the stiffness of a wind turbine reducer, in order to address the problems mentioned above.

[0006] The technical solution adopted in this utility model is as follows: A wind turbine reducer stiffness enhancement device includes a frame, on which at least two yaw reducers are provided, and all adjacent yaw reducers are connected by a first connecting plate.

[0007] Alternatively, the first connecting plate is connected to the flange of each yaw reducer.

[0008] Alternatively, the yaw reducer can be fastened to the first connecting plate by bolts.

[0009] Alternatively, the first connecting plate may have C-shaped notches at both ends that match the yaw reducer, and the edges of the C-shaped notches may have multiple mounting holes spaced apart.

[0010] Alternatively, a second connecting plate may be connected between the yaw reducer and the frame.

[0011] Alternatively, the two outermost yaw reducers are connected to the frame via a second connecting plate.

[0012] Alternatively, one end of the second connecting plate is provided with a C-shaped notch that matches the yaw reducer, and the edge of the C-shaped notch is provided with a plurality of mounting holes at intervals; the other end of the second connecting plate is fixedly connected to the frame.

[0013] Alternatively, the second connecting plate is bolted to the frame, or the second connecting plate is welded to the frame.

[0014] Alternatively, the first connecting plate and the second connecting plate are arranged perpendicular to the axis of the yaw reducer.

[0015] Alternatively, the frame may be the front frame of a wind turbine.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: This invention provides a stiffening device for wind turbine reducers. A first reinforcing plate connects multiple reducers into a single unit, transforming local loads into system loads and distributing stress across the entire circumference of the reducer base, thus reducing stress at individual lug connections. Simultaneously, a second reinforcing plate constrains the displacement and movement of yaw system components, increasing the system's natural frequency and resulting in a smoother response to dynamic loads. This solution significantly enhances the structural stiffness of the yaw system, greatly reducing deformation. Attached Figure Description

[0017] Figure 1 This is an axial view of the wind turbine reducer stiffness enhancement device.

[0018] Figure 2 This is a radial view of the wind turbine reducer stiffness enhancement device.

[0019] The markings in the diagram are: 1-frame, 2-yaw reducer, 3-first connecting plate, 4-second connecting plate. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. It should be noted that, except for dependent embodiments, any embodiment exists independently, and its implementation or non-implementation does not affect the integrity of the remaining embodiments, nor does the implementation or non-implementation of dependent embodiments affect the integrity of the original embodiments.

[0022] A stiffness-enhancing device for wind turbine reducers, such as Figure 1-2 As shown, it includes a frame 1, on which at least two yaw reducers 2 are provided, and all adjacent yaw reducers 2 are connected by a first connecting plate 3.

[0023] This solution starts with the yaw reducer 2 itself, considering the linkage effect between multiple yaw reducers 2. A first connecting plate 3 is added between the multiple reducers, forming a frame structure between the yaw reducers 2. This balances the tensile and compressive stresses generated by the torque load on the yaw system, reducing the deformation of the frame 1 ear plates. This solution effectively enhances the structural rigidity of the yaw system, significantly reducing deformation. When yaw starts, the yaw motor drives the yaw pinion to rotate, which in turn drives the yaw bearing to rotate, causing the nacelle to rotate to face the wind. In this invention, a "stress-reinforcing ring" is formed by mechanically connecting and fixing the upper part of the yaw reducer 2. When the frame 1 ear plates are subjected to tensile and compressive stresses generated by the load, the integrated reducers transmit and distribute the tensile force to the reducer base throughout the circumference, sharing the force. Simultaneously, because each reducer is integrated, the driving reaction force is transmitted and distributed from its own ear plate area to adjacent areas, greatly reducing the stress at the connection of individual ear plates and minimizing shear deformation or warping caused by driving stress. Existing technologies mostly focus on enhancing the strength of the frame 1 itself or directly replacing the reducer to improve the deformation problem. However, in this device, only one additional reinforcing connecting plate component is needed compared to the traditional yaw reduction system, and a lower deformation can be achieved at a lower economic cost.

[0024] In another specific implementation, the first connecting plate 3 is connected to the flange of each yaw reducer 2. The flange has robust structural strength and precise assembly reference, ensuring that each yaw reducer 2 maintains a consistent installation posture after connection. Simultaneously, the flange has existing mounting holes, eliminating the need for additional drilling. The first connecting plate 3, connected at this location, fully utilizes the structural characteristics of the flange to achieve a reliable connection between each yaw reducer 2.

[0025] In another specific implementation, the yaw reducer 2 and the first connecting plate 3 are fastened together by bolts. This bolted connection ensures a stable and tight connection between the yaw reducer 2 and the first connecting plate 3, guaranteeing that they remain relatively fixed under load and preventing load transmission interruption or force shift due to loosening. Furthermore, the bolted connection offers good disassembly, allowing for maintenance, repair, or component replacement without damaging the main structure, significantly reducing operational difficulty and maintenance costs.

[0026] In another specific implementation, the first connecting plate 3 has C-shaped notches at both ends that match the yaw reducer 2, and multiple mounting holes are spaced apart along the edges of the C-shaped notches. The C-shaped notches precisely match the yaw reducer 2, tightly fitting the outer contour of the reducer, allowing the first connecting plate 3 and each yaw reducer 2 to form a more secure connection, avoiding force shifts or vibration interference caused by connection gaps. The multiple mounting holes spaced apart along the edges of the notches allow for multi-point uniform fastening with bolts, ensuring a balanced distribution of connection force along the outer periphery of the reducer, further reducing localized force concentration.

[0027] In another specific implementation, a second connecting plate 4 is also connected between the yaw reducer 2 and the frame 1. The second connecting plate 4 can share the load-bearing pressure of the first connecting plate 3, directly transferring part of the load borne by the yaw reducer 2 to the frame 1, forming a multi-path load transfer channel and avoiding excessive stress on a single connection structure. Compared with the scheme of connecting the reducer only through the first connecting plate 3, the addition of the second connecting plate 4 makes the stress distribution of the entire stiffness strengthening device more balanced, the structural redundancy higher, and can cope with more complex working load conditions. The second connecting plate 4 integrates all yaw system components into a high-rigidity whole, constraining the displacement and rotation of system components in the horizontal plane, reducing the amplification effect of dynamic loads, thereby greatly reducing the deformation of components and improving the reliability of the yaw system.

[0028] In another specific implementation, the two outermost yaw reducers 2 and the frame 1 are connected by a second connecting plate 4. This can precisely strengthen the stress support at the edge of the system, specifically constrain the displacement and rotation of the outermost reducer, and avoid load transmission lag or excessive local deformation caused by positional offset. It also works in conjunction with the overall linkage structure formed by the first connecting plate 3.

[0029] In another specific implementation, one end of the second connecting plate 4 is provided with a C-shaped notch that matches the yaw reducer 2, and multiple mounting holes are spaced apart along the edge of the C-shaped notch; the other end of the second connecting plate 4 is fixedly connected to the frame 1. The C-shaped notch precisely matches the yaw reducer 2, allowing it to closely fit the outer contour of the reducer, thus creating a more secure connection between the second connecting plate 4 and each yaw reducer 2, avoiding force shift or vibration interference caused by connection gaps. The multiple mounting holes spaced apart along the edge of the notch allow for uniform fastening at multiple points with bolts, ensuring a balanced distribution of the connection force along the outer periphery of the reducer, further reducing localized force concentration. The other end of the second connecting plate 4 is fixed to the frame 1, establishing a direct and stable force transmission channel between the reducer and the frame 1, allowing the load borne by the outermost reducer to be efficiently transmitted to the frame 1, complementing the overall linkage structure formed with the first connecting plate 3.

[0030] In another specific implementation, the second connecting plate 4 is connected to the frame 1 by bolts, or the second connecting plate 4 is welded to the frame 1. Bolting allows for a stable and detachable connection between the two, eliminating the need to damage the main structure during subsequent maintenance, repair, or component replacement, significantly reducing operational difficulty and maintenance costs, while ensuring sufficient connection strength to transfer loads. Welding allows the second connecting plate 4 and the frame 1 to form an integrated structure, further enhancing the load-bearing capacity and vibration resistance of the connection area, effectively meeting the stress requirements under long-term heavy loads or complex working conditions.

[0031] In another specific implementation, the first connecting plate 3 and the second connecting plate 4 are arranged perpendicular to the axis of the yaw reducer 2. This allows the connecting plates to precisely match the force direction of the reducer, making the load transmission path more direct and smooth, effectively constraining the displacement and rotation of the yaw reducer 2 in the horizontal plane, matching the working posture and force characteristics of the reducer, and reducing component swaying and deformation under dynamic loads.

[0032] In another specific implementation, the frame 1 is the front frame 1 of the wind turbine. The front frame 1 is the core mounting carrier of the yaw system, possessing an inherent mounting foundation and structural strength compatible with the yaw reducer 2, providing a stable and precise assembly reference for the yaw reducer 2, the first connecting plate 3, and the second connecting plate 4. The structural layout of the front frame 1 is highly compatible with the installation requirements of the yaw reducer 2, ensuring that each component maintains its preset relative position after assembly, guaranteeing the smoothness of the load transmission path, and avoiding the impact of installation reference deviations on the force coordination effect. Besides the frame 1, the second connecting plate 4 can also be connected to other fixed structures besides the frame 1, all of which can realize the overall structure for transmitting loads to the wind turbine.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. The present utility model extends to any new features or combinations disclosed in this specification, and any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model. It is obvious to those skilled in the art that the present utility model is not limited to the details of the above exemplary embodiments, and that detailed technical features not disclosed in this embodiment, such as specific structures, are all prior art and can be obtained by those skilled in the art from the prior art; the connection method can be a fixed connection, a detachable connection, or an integral part; it can be a fixed connection, a movable connection, or a hinged connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific manner of the above terms in the embodiments of the present utility model according to the specific circumstances, and the present disclosure does not specifically limit this aspect.

[0034] In the description of the embodiments of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0035] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

Claims

1. A wind turbine generator set reducer stiffness reinforcement device, characterized by: Includes a frame (1), on which at least two yaw reducers (2) are provided, and all adjacent yaw reducers (2) are connected by a first connecting plate (3).

2. The wind turbine gearbox stiffness reinforcement device of claim 1, wherein: The first connecting plate (3) is connected to the flange of each yaw reducer (2).

3. The wind turbine gearbox stiffness reinforcement device of claim 1 or 2, wherein: The yaw reducer (2) and the first connecting plate (3) are fastened together by bolts.

4. The wind turbine reducer stiffness strengthening device as described in claim 3, characterized in that: The first connecting plate (3) has C-shaped notches at both ends that match the yaw reducer (2), and the edges of the C-shaped notches are provided with multiple mounting holes at intervals.

5. The wind turbine reducer stiffness strengthening device as described in claim 1, characterized in that: A second connecting plate (4) is also connected between the yaw reducer (2) and the frame (1).

6. The wind turbine reducer stiffness strengthening device as described in claim 5, characterized in that: The two outermost yaw reducers (2) and the frame (1) are connected by a second connecting plate (4).

7. The wind turbine reducer stiffness strengthening device as described in claim 5 or 6, characterized in that: One end of the second connecting plate (4) is provided with a C-shaped notch that matches the yaw reducer (2), and the edge of the C-shaped notch is provided with a plurality of mounting holes at intervals; the other end of the second connecting plate (4) is fixedly connected to the frame (1).

8. The wind turbine reducer stiffness strengthening device as described in claim 7, characterized in that: The second connecting plate (4) is connected to the frame (1) by bolts, or the second connecting plate (4) is welded to the frame (1).

9. The wind turbine reducer stiffness strengthening device as described in claim 5, characterized in that: The first connecting plate (3) and the second connecting plate (4) are arranged perpendicular to the axis of the yaw reducer (2).

10. The wind turbine reducer stiffness strengthening device as described in claim 1, characterized in that: The frame (1) is the front frame (1) of the wind turbine.

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