Load bearing structure of wind turbine blade

Abstract

The utility model discloses a bearing structure of a wind turbine blade, and relates to the field of wind power generation. According to the technical scheme, the device comprises a cylindrical fixing base, and the outer surface of the fixing base is provided with a groove; the supporting net is in a cross-woven net shape, and the end part of the supporting net is fixed in the groove; the traction disc is fixed in the groove; the traction rod is in sliding connection with the traction disc; the spring sleeves the traction rod and is used for applying elastic force to the traction rod; the two ends of the inhaul cable are fixedly connected with the traction rod and the supporting net respectively, and the inhaul cable is used for providing traction force for the supporting net. The supporting net and the traction disc are installed on the fixing base, the two ends of the inhaul cable are fixed to the supporting net and the traction disc respectively, a bridge inhaul cable structure is formed, the bearing capacity of the tail of the blade is improved, and therefore the bearing strength of the blade is improved.

Description

Technical Field

[0001] The utility model relates to the field of wind power generation, in particular to a bearing structure of a wind turbine blade. Background Art

[0002] Wind power generation equipment mainly includes vertical power generation and radial power generation. Among them, radial power generation wind discharge equipment has a large power generation capacity and is widely used;

[0003] In order to better receive wind power, the wind turbine blades in radial power generation equipment are designed to be longer, and the load-bearing of the blades is particularly important. Traditional blade load-bearing relies heavily on the strength of the blades themselves. When the blades are subjected to strong airflow, the load-bearing strength of the blades is insufficient and they are prone to breakage. Utility Model Content

[0004] (I) Purpose of the utility model

[0005] In view of this, the purpose of the utility model is to propose a load-bearing structure for a wind turbine blade, so as to realize load-bearing of the blade by pulling inside the blade, thereby improving the load-bearing strength.

[0006] (II) Technical solution

[0007] In order to achieve the above technical objectives, the utility model provides a bearing structure of a wind turbine blade:

[0008] It includes: a fixed seat, which is cylindrical and has a groove on the outer surface; a support net, which is a cross-woven net, and the end is fixed in the groove; a pulling disk, which is fixed inside the groove; a pulling rod, which is slidably connected to the pulling disk; a spring, which is sleeved on the pulling rod and is used to apply elastic force to the pulling rod; a pull rope, whose two ends are respectively fixedly connected to the pulling rod and the support net, and is used to provide pulling force for the support net.

[0009] Preferably, the outer surface of the fixing seat is evenly provided with connecting grooves.

[0010] Preferably, a through groove is formed through the middle of the fixing seat.

[0011] Preferably, a screw hole is formed on a side of the fixing seat facing away from the groove.

[0012] Preferably, a linear bearing is fixed to the outer surface of the pulling disk, and the pulling rod is slidably connected to the linear bearing.

[0013] Preferably, one end of the pulling rod is T-shaped, and a connecting ring is fixed to the other end of the pulling rod, and the end of the pulling cable is fixedly connected to the connecting ring.

[0014] Preferably, two ends of the spring are respectively against the linear bearing and the pulling rod.

[0015] It can be seen from the above technical solutions that the present application has the following beneficial effects:

[0016] 1: By installing a support net and a pulling disk on the fixed seat, the two ends of the cable are respectively fixed to the support net and the pulling disk to form a bridge cable structure, thereby improving the bearing capacity of the tail of the blade, thereby improving the bearing strength of the blade.

[0017] 2: By fixing the pull cable to the pulling rod and elastically connecting the pulling rod to the pulling disk, when the blade is subjected to strong airflow, the torsional vibration of the blade can be reduced by the elastic contraction of the spring, further improving the bearing strength of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the overall structure of the bearing structure of the wind turbine blade provided by the utility model;

[0020] Figure 2 A side structural schematic diagram of the bearing structure of a wind turbine blade provided by the utility model;

[0021] Figure 3 This is a schematic diagram of a partial cross-sectional structure of the bearing structure of a wind turbine blade provided by the utility model.

[0022] Description of the drawings: 1. Fixed seat; 101. Connecting groove; 102. Groove; 103. Screw hole; 104. Through groove; 2. Support net; 3. Pulling disk; 301. Pulling rod; 301a. Connecting ring; 302. Spring; 303. Cable; 304. Linear bearing. DETAILED DESCRIPTION

[0023] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and use. It should be understood that in all of these figures, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present disclosure. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0024] Embodiment 1

[0025] Reference Figure 1 and Figure 3 As shown, the bearing structure of the wind turbine blade includes a fixing seat 1, which is cylindrical and is used to be connected to the blade shell, that is, the casting surface of the blade, so as to form a completed blade structure, and the fixing seat 1 is also used to be connected to the input unit of the wind power generation equipment. The specific connection method is a known public technology and will not be elaborated in detail here;

[0026] Specifically, Figure 2 As shown, a groove 102 is provided on the outer surface of the fixing seat 1, and a support net 2 is fixed in the groove 102. The support net 2 is in the shape of a cross-woven mesh. The support net 2 is fixed on the inner wall of the blade shell to enhance the torsional strength of the blade, because the cross-woven mesh structure can pull the blade shell and prevent the blade shell from cracking.

[0027] More specifically, Figure 1 and Figure 3 As shown, a pulling disk 3 is fixed in the groove 102, and a pulling rod 301 is slidably connected to the pulling disk 3. A spring 302 is sleeved on the pulling rod 301, and the spring 302 is used to apply elastic force to the pulling rod 301. A cable 303 is fixed to the end of the pulling rod 301 away from the spring 302, and the other end of the cable 303 is fixedly connected to the supporting net 2, and the cable 303 is used to provide pulling force for the supporting net 2; the purpose is that the current fixing seat 1 is generally a metal structure, and the blade shell is generally a glass fiber or carbon fiber structure, which ensures strength while being light in weight. The end of the blade shell away from the fixing seat 1 can only rely on the support of the bearing structure or the strength of the blade shell itself, but is fixed to the supporting net 2 by the cable 303, and the supporting net 2 is fixed to the blade shell, so that the end of the blade shell away from the fixing seat 1 can receive pulling force, thereby improving the overall torsional strength of the shell.

[0028] Embodiment 2

[0029] See also Figure 3 As shown, based on the first embodiment, the improvement of the second embodiment is that a linear bearing 304 is fixed to the outer surface of the pulling disk 3, and the pulling rod 301 is slidably connected to the linear bearing 304, so as to reduce the sliding friction of the pulling rod 301 on the pulling disk 3 and improve the sliding stability.

[0030] Furthermore, one end of the pulling rod 301 is T-shaped, which is used to limit the spring 302. The two ends of the spring 302 are respectively against the linear bearing 304 and the pulling rod 301, and the other end of the pulling rod 301 is fixed with a connecting ring 301a. The end of the cable 303 is fixedly connected to the connecting ring 301a to facilitate the connection of the cable 303. There is at least one cable 303, and multiple cables 303 are distributed to different points on the surface of the support net 2, that is, the pulling points are dispersed, which can enhance the pulling effect.

[0031] Embodiment 3

[0032] Based on the above embodiments, see Figure 1 , Figure 2 and Figure 3 As shown, the outer surface of the fixing seat 1 is evenly provided with connection grooves 101, which is beneficial to increase the contact friction with the blade shell, that is, increase the connection surface when the blade shell is cast, so that the connection between the fixing seat 1 and the blade shell is more stable.

[0033] A through slot 104 is formed through the middle of the fixing seat 1 , so as to make the fixing seat 1 lightweight.

[0034] A screw hole 103 is provided on one side of the fixing base 1 away from the groove 102 to facilitate connection with the input unit of the wind power generation equipment.

[0035] The exemplary implementation scheme of the present disclosure is described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure can be combined in various ways without exceeding the protection scope of the present disclosure, which is determined by the attached claims.

Claims

1. A load-bearing structure for a wind turbine blade, characterized in that: include: The fixing seat (1) is cylindrical and has a groove (102) on its outer surface; the supporting net (2) is cross-woven and has its end fixed in the groove (102); the pulling disk (3) is fixed in the groove (102); the pulling rod (301) is slidably connected to the pulling disk (3); the spring (302) is sleeved on the pulling rod (301) and is used to apply elastic force to the pulling rod (301); the pulling rope (303) has two ends respectively fixedly connected to the pulling rod (301) and the supporting net (2) and is used to provide pulling force to the supporting net (2).

2. The load-bearing structure of a wind turbine blade according to claim 1, characterized in that: The outer surface of the fixing seat (1) is evenly provided with connection grooves (101).

3. The load-bearing structure of a wind turbine blade according to claim 1, characterized in that: A through slot (104) is provided through the middle of the fixing seat (1).

4. The load-bearing structure of a wind turbine blade according to claim 1, characterized in that: A screw hole (103) is provided on a side of the fixing seat (1) facing away from the groove (102).

5. The load-bearing structure of a wind turbine blade according to claim 1, characterized in that: A linear bearing (304) is fixed on the outer surface of the pulling disk (3), and the pulling rod (301) is slidably connected to the linear bearing (304).

6. The load-bearing structure of a wind turbine blade according to claim 1, characterized in that: One end of the pulling rod (301) is T-shaped, and the other end of the pulling rod (301) is fixed with a connecting ring (301a), and the end of the pulling cable (303) is fixedly connected to the connecting ring (301a).

7. The load-bearing structure of a wind turbine blade according to claim 1, characterized in that: The two ends of the spring (302) are respectively against the linear bearing (304) and the pulling rod (301).

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