Blade and high-cold wind turbine generator set
Patent Information
- Application Number
- CN202522477835.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-21
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-21
AI Technical Summary
[0003]本实用新型的主要目的是提出一种叶片及高寒风力发电机组，旨在解决现有的叶片叶根稳定性较差的技术问题
[0014]本实用新型的叶片的一端设置有环形叶根，环形叶根包括内加强层、预埋组件以及外加强层，预埋组件设置在内加强层和外加强层围成的环形空间内，其中预埋组件包括多个螺栓套以及多个楔形块，多个螺栓套以及多个楔形块相互交错设置，且楔形块环形空间径向的两侧抵接内加强层的外加强层，形成稳定的支撑框架。螺栓套被限制在相邻楔形块形成的限位腔内，其外周侧与腔壁紧密抵接，有效防止其在强风载荷或热胀冷缩作用下发生松动或脱出。并通过设置连接件，连接件与螺栓套外周侧卡接，并将其两端分别连接至相邻的两个楔形块，不仅增强了螺栓套在限位腔内的稳定性，还将螺栓套与相邻的两个楔形块连接，螺栓套与楔形块相互作用，有效的分散了螺栓套所承受的载荷，进而避免螺栓套脱出，稳定性更好，大幅提升了叶片整体的长期定性。
Smart Images
Figure CN224903359U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wind power generation equipment technology, and in particular to a blade and a high-altitude cold-weather wind turbine generator set. Background Technology
[0002] Wind turbines in high-altitude and cold regions face challenges such as strong winds and large temperature differences. In strong winds, the blade roots bear significant loads; large temperature differences also cause materials to expand and contract, affecting the load-bearing capacity of the blade roots. Currently, the blade roots are mainly connected to the pitch bearings by pre-embedded bolt sleeves. While wedge-shaped blocks are filled between two bolt sleeves during pre-embedding to enhance their stability to some extent, in high-altitude and cold regions, when the blade roots bear greater loads or the bolt sleeve structure expands and contracts under large temperature differences, the bolt sleeves can still easily come loose, leading to blade damage and poor stability. Utility Model Content
[0003] The main purpose of this invention is to propose a blade and a high-altitude wind turbine generator set, which aims to solve the technical problem of poor blade root stability in existing blades.
[0004] To achieve the above objectives, this utility model proposes a blade, wherein one end of the blade is provided with an annular blade root, the annular blade root includes an inner reinforcing layer, a pre-embedded component, and an outer reinforcing layer, the outer reinforcing layer is sleeved outside the inner reinforcing layer, and the outer reinforcing layer and the inner reinforcing layer form an annular space, the pre-embedded component is disposed within the annular space, the pre-embedded component includes multiple bolt sleeves and multiple wedge blocks, the multiple wedge blocks are evenly distributed circumferentially along the annular space, and each wedge block abuts against the inner reinforcing layer and the outer reinforcing layer on opposite sides radially along the annular space, a limiting cavity is formed between any two adjacent wedge blocks, a bolt sleeve is disposed in each limiting cavity, and the outer peripheral side of the bolt sleeve abuts against the cavity wall of the limiting cavity; Within the annular space, a connector is also provided for each of the bolt sleeves. The connector engages with the outer periphery of the bolt sleeve, and the two opposite ends of the connector along the circumference of the annular space are respectively connected to the two wedge blocks.
[0005] In one embodiment, each of the wedge blocks has two opposite sides along the radial direction of the annular space as abutment sides, and two corresponding slots are respectively provided on any two adjacent abutment sides provided on the same side. Each of the connectors extends into and is engaged in the two corresponding slots at opposite ends along the circumferential direction of the annular space. The connector is provided with a locking block on the side facing the bolt sleeve, and the locking block can extend into the corresponding limiting cavity. The outer periphery of the bolt sleeve is provided with an annular groove for the locking block to extend into and engage.
[0006] In one embodiment, the cavity wall of each limiting cavity completely covers the outer peripheral side of the corresponding bolt sleeve, and each of the connecting members protrudes from opposite ends along the circumferential direction of the annular space toward one side of the corresponding limiting cavity to form two flanges respectively. The bottom wall of each slot is provided with a groove for the flange to extend into and engage. The bottom wall of the slot is also provided with a clearance hole for the locking block to extend into the limiting cavity.
[0007] In one embodiment, both abutting sides of each wedge block are arc-shaped abutting sides, and the two arc-shaped abutting sides are respectively matched with the inner reinforcing layer and the outer reinforcing layer.
[0008] In one embodiment, the side of each connector facing away from the limiting cavity is flush with the two corresponding abutting sides.
[0009] In one embodiment, two connectors are provided in the annular space corresponding to each bolt sleeve, and the two connectors are respectively located on opposite sides of the bolt sleeve along the radial direction of the annular space; both connectors are engaged with the outer periphery of the bolt sleeve, and the opposite ends of the two connectors along the circumferential direction of the annular space are respectively connected to the two wedge blocks.
[0010] In one embodiment, two connectors connected to the same wedge block and disposed on the same side are spaced apart along the extension direction of the wedge block.
[0011] In one embodiment, each of the wedge blocks is provided with a plurality of limiting blocks on the side facing the limiting cavity, and the plurality of limiting blocks are spaced apart along the extension direction of the wedge block. The bolt sleeve located in the same limiting cavity is provided with an annular limiting groove corresponding to the position of each limiting block, and each limiting block extends into and engages with the corresponding annular limiting groove.
[0012] In one embodiment, a covering layer is further provided on the outer periphery of each bolt sleeve.
[0013] This utility model also proposes a high-altitude cold-weather wind turbine generator set, which uses the blades described above.
[0014] The blade of this invention features an annular blade root at one end. This annular blade root includes an inner reinforcing layer, a pre-embedded component, and an outer reinforcing layer. The pre-embedded component is positioned within the annular space formed by the inner and outer reinforcing layers. The pre-embedded component comprises multiple bolt sleeves and multiple wedge blocks, which are staggered. The radial sides of the wedge blocks abut against the outer reinforcing layer of the inner reinforcing layer, forming a stable support frame. The bolt sleeves are confined within a limiting cavity formed by adjacent wedge blocks, with their outer periphery tightly abutting against the cavity wall, effectively preventing loosening or detachment under strong wind loads or thermal expansion and contraction. Furthermore, a connector is provided, which engages with the outer periphery of the bolt sleeve and connects its two ends to two adjacent wedge blocks. This not only enhances the stability of the bolt sleeve within the limiting cavity but also connects the bolt sleeve to the two adjacent wedge blocks. The interaction between the bolt sleeve and the wedge blocks effectively disperses the load borne by the bolt sleeve, thus preventing detachment and improving overall stability, significantly enhancing the long-term stability of the blade. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0016] Figure 1 A schematic diagram of the annular leaf root structure of a blade provided in an embodiment of this utility model; Figure 2 A schematic diagram of a portion of the annular leaf root structure of a blade provided in an embodiment of this utility model; Figure 3 This is an exploded view of a portion of the annular leaf root structure of a blade according to an embodiment of the present invention.
[0017] Explanation of icon numbers: 100. Annular blade root; 1. Embedded component; 11. Bolt sleeve; 111. Annular groove; 112. Annular limiting groove; 12. Wedge block; 121. Abutting side; 122. Slot; 123. Groove; 124. Clearance hole; 125. Limiting block; 13. Limiting cavity; 14. Connector; 141. Flange; 142. Locking block; 15. Filler; 2. Inner reinforcing layer; 3. Outer reinforcing layer.
[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0022] This utility model proposes a blade.
[0023] Please see Figures 1 to 3 In one embodiment of this utility model, one end of the blade is provided with an annular blade root 100. The annular blade root 100 includes an inner reinforcing layer 2, a pre-embedded component 1, and an outer reinforcing layer 3. The outer reinforcing layer 3 is sleeved outside the inner reinforcing layer 2, and the outer reinforcing layer 3 and the inner reinforcing layer 2 form an annular space. The pre-embedded component 1 is disposed in the annular space and includes multiple bolt sleeves 11 and multiple wedge blocks 12. The multiple wedge blocks 12 are evenly distributed along the circumference of the annular space, and each wedge block 12 is arranged along the annular space. The two opposite sides of the radial direction of the space abut against the inner reinforcing layer 2 and the outer reinforcing layer 3 respectively. A limiting cavity 13 is formed between any two adjacent wedge blocks 12. A bolt sleeve 11 is provided in each limiting cavity 13, and the outer peripheral side of the bolt sleeve 11 abuts against the cavity wall of the limiting cavity 13. A connector 14 is also provided in the annular space corresponding to each bolt sleeve 11. The connector 14 is engaged with the outer peripheral side of the bolt sleeve 11, and the two opposite ends of the connector 14 along the circumferential direction of the annular space are respectively connected to the two wedge blocks 12.
[0024] The blade of this invention has an annular blade root 100 at one end. The annular blade root 100 includes an inner reinforcing layer 2, a pre-embedded component 1, and an outer reinforcing layer 3. The pre-embedded component 1 is disposed within the annular space enclosed by the inner reinforcing layer 2 and the outer reinforcing layer 3. The pre-embedded component 1 includes multiple bolt sleeves 11 and multiple wedge blocks 12, which are staggered and interleaved. The radial sides of the wedge blocks 12 abut against the outer reinforcing layer 3 of the inner reinforcing layer 2, forming a stable support frame. The bolt sleeves 11 are confined within the limiting cavity 13 formed by adjacent wedge blocks 12, and their outer circumference is tightly abutted against the cavity wall, effectively preventing them from loosening or falling out under strong wind loads or thermal expansion and contraction. Furthermore, by setting a connector 14, which engages with the outer periphery of the bolt sleeve 11 and connects its two ends to two adjacent wedge blocks 12 respectively, the stability of the bolt sleeve 11 within the limiting cavity 13 is enhanced. The bolt sleeve 11 is also connected to the two adjacent wedge blocks 12. The interaction between the bolt sleeve 11 and the wedge blocks 12 effectively disperses the load borne by the bolt sleeve 11, thereby preventing the bolt sleeve 11 from coming off, resulting in better stability and significantly improving the overall long-term stability of the blade.
[0025] Understandably, any two adjacent wedge blocks 12 are connected to at least one connector 14. The connector 14 can also ensure that the corresponding two wedge blocks 12 remain stable to each other, which is beneficial to improving the pre-embedded positioning accuracy of the wedge blocks 12 and the bolt sleeve 11 during the manufacturing process of the blade root 100.
[0026] Furthermore, one end of the bolt sleeve 11 is also connected to a filler 15, which is mainly used to fill the annular space.
[0027] In one embodiment, each wedge block 12 has two opposite sides of the radial direction of the annular space as abutment sides 121. Two adjacent abutment sides 121 are respectively provided with two corresponding slots 122. Each connector 14 extends into and is engaged in the two corresponding slots 122 at opposite ends of the circumferential direction of the annular space. A locking block 142 is provided on the side of the connector 14 facing the bolt sleeve 11, and the locking block 142 can extend into the corresponding limiting cavity 13. An annular groove 111 is provided on the outer periphery of the bolt sleeve 11 for the locking block 142 to extend into and be engaged.
[0028] By providing two slots 122 on two adjacent abutment sides 121 located on the same side, with the two slots 122 being positioned opposite each other, the two ends of the connector 14 can extend into and engage with the two slots 122. Furthermore, by providing a locking block 142 on the side of the connector 14 facing the bolt sleeve 11, and providing an annular groove 111 on the outer periphery of the bolt sleeve 11 corresponding to the locking block 142, when the two ends of the connector 14 are respectively engaged with the two slots 122, the locking block 142 also extends into the limiting cavity 13 and engages with the annular groove 111 on the outer periphery of the bolt sleeve 11. The annular groove 111 allows the bolt sleeve 11 to engage with the locking block 142 simply by being placed within the limiting cavity 13, making the installation of the connector 14 simpler and more convenient, thus improving production efficiency.
[0029] Understandably, in cold regions, even if temperature differences cause slight thermal expansion and contraction of the bolt sleeve 11, the retaining block 142 remains engaged within the annular groove 111, thus ensuring the stability of the bolt sleeve 11. Furthermore, since both ends of the connecting member 14 extend into the two retaining grooves 122, when the bolt sleeve 11 is subjected to load, the load is distributed to the two wedge-shaped blocks 12 through the connecting member 14. Understandably, the direction of the force acting on the bolt sleeve 11 to disengage it is the same as the direction of extension of the bolt sleeve 11.
[0030] In one embodiment, the cavity wall of each limiting cavity 13 completely covers the outer periphery of the corresponding bolt sleeve 11, and the opposite ends of each connector 14 in the annular space protrude toward one side of the corresponding limiting cavity 13 to form two flanges 141 respectively. The bottom wall of each slot 122 is provided with a groove 123 for the corresponding flange 141 to extend into and engage. The bottom wall of the slot 122 is also provided with a clearance hole 124 for the corresponding locking block 142 to extend into the limiting cavity 13.
[0031] Understandably, by completely covering the outer periphery of the bolt sleeve 11 with the cavity wall of the limiting cavity 13, that is, by completely wrapping the corresponding bolt sleeve 11 with the two wedge blocks 12, the contact surface between the wedge blocks 12 and the bolt sleeve 11 is larger, which can effectively resist the alternating stress caused by strong wind loads and the micro-movement caused by thermal expansion and contraction, and significantly reduce the risk of the bolt sleeve 11 loosening, deflecting or falling out. The connector 14 has flanges 141 at both ends, and the bottom wall of the slot 122 has a corresponding groove 123. After the flanges 141 are embedded in the grooves 123, the connector 14 is not easy to fall off, which helps to limit the two adjacent wedge blocks 12 in the circumferential direction of the annular space, and makes it easier to pre-embed.
[0032] In one embodiment, both abutting sides 121 of each wedge block 12 are arc-shaped abutting sides 121, and the two arc-shaped abutting sides 121 are respectively matched with the inner reinforcing layer 2 and the outer reinforcing layer 3. Understandably, the two arc-shaped abutting sides 121 of each wedge block 12 are respectively in close contact with the inner reinforcing layer 2 and the outer reinforcing layer 3, significantly increasing the contact area, so that the stress distribution of the blade root 100 is more uniform when subjected to strong wind loads, avoiding local stress concentration, thereby improving the load-bearing capacity and fatigue life of the overall structure.
[0033] In one embodiment, the side of each connector 14 facing away from the limiting cavity 13 is flush with the two corresponding abutment sides 121. Understandably, the outer side of the connector 14 is flush with the arc-shaped abutment side 121 of the wedge block 12, which reduces the gaps in the annular space and makes the structure more stable.
[0034] Specifically, the inner reinforcing layer 2 and the outer reinforcing layer 3 can be made of glass fiber, carbon fiber, etc.
[0035] In one embodiment, two connectors 14 are provided in the annular space corresponding to each bolt sleeve 11, and the two connectors 14 are respectively located on opposite sides of the bolt sleeve 11 along the radial direction of the annular space; both connectors 14 are engaged with the outer peripheral side of the bolt sleeve 11, and the two connectors 14 are respectively connected to two wedge blocks 12 at opposite ends along the circumferential direction of the annular space.
[0036] In this embodiment, a connector 14 is provided on each of the radially opposite sides of the annular space of each bolt sleeve 11. Both connectors 14 are engaged with the outer periphery of the bolt sleeve 11, and the two connectors 14 are connected to two wedge blocks 12 at their opposite ends along the circumference of the annular space. That is, two connectors 14 are connected between any two adjacent wedge blocks 12, which helps to improve the stability between the wedge blocks 12. The two connectors 14 are symmetrically arranged on both radially sides of the annular space of the bolt sleeve 11, which can effectively clamp the bolt sleeve 11 and better disperse the force on the bolt sleeve 11, avoid overload of a single connector 14, and significantly improve the overall rigidity and fatigue resistance of the entire embedded component 1.
[0037] In one embodiment, two connecting members 14 connected to the same wedge block 12 and disposed on the same side are spaced apart along the extending direction of the wedge block 12. It is understood that spaced-apart connecting members 14 to the same wedge block 12 ensures a reasonable distribution of the connecting members 14, preventing the load on two adjacent bolt sleeves 11 from being distributed at the same position on the wedge block 12 between the two bolt sleeves 11, thereby avoiding excessive fatigue fracture of the wedge block 12 and improving reliability.
[0038] Understandably, each bolt sleeve 11 has two annular grooves 111 on its outer periphery along its extension direction, and the two annular grooves 111 are used to match the connectors 14 at different positions.
[0039] In one embodiment, each wedge block 12 is provided with a plurality of limiting blocks 125 on the side facing the limiting cavity 13, and the plurality of limiting blocks 125 are spaced apart along the extension direction of the wedge block 12. The bolt sleeve 11 located in the same limiting cavity 13 is provided with an annular limiting groove 112 corresponding to the position of each limiting block 125, and each limiting block 125 extends into and is engaged in the corresponding annular limiting groove 112.
[0040] Understandably, by providing multiple limiting blocks 125 on the side of the wedge block 12 facing the limiting cavity 13, and by providing annular limiting grooves 112 for the limiting blocks 125 to extend into the bolt sleeve 11 at the positions corresponding to each limiting block 125, it is beneficial for the bolt sleeve 11 and the wedge block 12 to constrain each other and achieve better stability.
[0041] It should be noted that, in Figure 3 The image only shows one limiting block 125 and one annular limiting groove 112. In a specific embodiment, multiple annular limiting grooves 112 are evenly spaced along the extension direction of the bolt sleeve 11.
[0042] Furthermore, the annular limiting groove 112 and the annular groove 111 are the same size, which facilitates the processing and preparation of the bolt sleeve 11.
[0043] In one embodiment, a covering layer (not shown) is also provided on the outer periphery of each bolt sleeve 11. Understandably, by providing the covering layer, the bolt sleeve 11 is usually made of metal (such as high-strength alloy steel), while the wedge block 12 is generally made of fiberglass or other materials. The two materials are different, and their coefficients of thermal expansion and contraction are also different. By providing the covering layer to fill and avoid the process gap between the bolt sleeve 11 and the wedge block 12, the tightness of the fit between the two is improved, and the stability is better.
[0044] Specifically, the coating layer can be made of elastic polymers or thermoplastic composite materials, etc.
[0045] This utility model also proposes a high-altitude cold-weather wind turbine generator set, which uses the blades described above. The specific structure of the blades is as described in the above embodiments. Since the high-altitude cold-weather wind turbine generator set adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.
[0046] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made under the technical concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A blade, characterized in that, One end of the blade is provided with an annular blade root, the annular blade root includes an inner reinforcing layer, a pre-embedded component and an outer reinforcing layer, the outer reinforcing layer is sleeved outside the inner reinforcing layer, and the outer reinforcing layer and the inner reinforcing layer form an annular space, the pre-embedded component is disposed in the annular space, the pre-embedded component includes multiple bolt sleeves and multiple wedge blocks, the multiple wedge blocks are evenly distributed circumferentially along the annular space, and each wedge block abuts against the inner reinforcing layer and the outer reinforcing layer on opposite sides radially along the annular space, a limiting cavity is formed between any two adjacent wedge blocks, a bolt sleeve is disposed in each limiting cavity, and the outer peripheral side of the bolt sleeve abuts against the cavity wall of the limiting cavity; Within the annular space, a connector is also provided for each of the bolt sleeves. The connector engages with the outer periphery of the bolt sleeve, and the two opposite ends of the connector along the circumference of the annular space are respectively connected to the two wedge blocks.
2. The blade as described in claim 1, characterized in that, Each of the wedge blocks has two opposite sides along the radial direction of the annular space as abutment sides. Two corresponding slots are opened on any two adjacent abutment sides that are set on the same side. Each of the connectors extends into and is engaged in the two corresponding slots at opposite ends along the circumferential direction of the annular space. The connector is provided with a locking block on the side facing the bolt sleeve, and the locking block can extend into the corresponding limiting cavity. The outer periphery of the bolt sleeve is provided with an annular groove for the locking block to extend into and engage.
3. The blade as described in claim 2, characterized in that, The cavity wall of each limiting cavity completely covers the outer periphery of the corresponding bolt sleeve. Each of the connecting members protrudes from opposite ends of the corresponding limiting cavity along the circumferential direction of the annular space to form two flanges respectively. The bottom wall of each slot is provided with a groove for the flange to extend into and engage. The bottom wall of the slot is also provided with a clearance hole for the locking block to extend into the limiting cavity.
4. The blade as described in claim 2, characterized in that, Both abutting sides of each wedge block are arc-shaped abutting sides, and the two arc-shaped abutting sides are respectively matched with the inner reinforcing layer and the outer reinforcing layer.
5. The blade as described in claim 2, characterized in that, The side of each connector that is away from the limiting cavity is flush with the two corresponding abutting sides.
6. The blade as described in any one of claims 1 to 5, characterized in that, Two connectors are provided in the annular space corresponding to each bolt sleeve, and the two connectors are located on opposite sides of the bolt sleeve along the radial direction of the annular space. Both connectors are engaged with the outer periphery of the bolt sleeve, and the opposite ends of the two connectors along the circumferential direction of the annular space are respectively connected to the two limiting cavities.
7. The blade as described in claim 6, characterized in that, Two connectors connected to the same wedge block and disposed on the same side are spaced apart along the extension direction of the wedge block.
8. The blade as described in any one of claims 1 to 5, characterized in that, Each of the wedge blocks is provided with a plurality of limiting blocks on the side facing the limiting cavity, and the plurality of limiting blocks are spaced apart along the extension direction of the wedge block. The bolt sleeve located in the same limiting cavity is provided with an annular limiting groove corresponding to the position of each limiting block, and each limiting block extends into and engages with the corresponding annular limiting groove.
9. The blade as described in any one of claims 1 to 5, characterized in that, Each of the bolt sleeves is further provided with a covering layer on its outer periphery.
10. A high-altitude, cold-weather wind turbine generator set, characterized in that, The high-altitude wind turbine generator set uses blades as described in any one of claims 1 to 9.