Wind power blade body lightning arrester fixing device

Abstract

The utility model relates to the technical field of wind power blade lightning protection, in particular to a wind power blade body lightning arrester fixing device which comprises a body and a groove body which is arranged at the edge of the body and used for fixing a down lead, the groove body comprises a through hole and a groove seam, the through hole is arranged at the position deviating from the center of the body to the edge, and the groove seam is arranged at the position deviating from the center of the body to the edge. And the slot is communicated with the through hole and the blade mounting space outside the body, so that the high-voltage downlead is prevented from being crimped after being disconnected, and the structural reliability of the lightning protection system is enhanced. According to the utility model, the body and the wing plate are arranged, the body mainly plays a role in connecting and supporting, the wing plate is used for connecting the down lead, and the down lead can be directly plugged into the through hole from the slot to be fixed through the slot arranged at the edge of the wing plate, so that the down lead is fixed and connected under the condition that a lead is not damaged, and the through-current capability of the down lead is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wind power blade lightning protection, and specifically provides a wind power blade blade lightning receptor fixing device. BACKGROUND

[0002] The fan blade is a very important component of the wind power generation system, and its main function is to convert the kinetic energy of wind into mechanical energy to drive the generator rotor to generate electric energy. However, in the areas where lightning activities are frequent, the fan blade is easy to become the target of lightning, causing serious damage and even destroying the entire fan system. Therefore, taking a series of lightning protection measures is crucial to ensure the safe operation of the fan blade.

[0003] For the wind turbine blade, the lightning protection principle of the blade lightning receptor is to introduce lightning through the lightning receptor on the surface of the blade, and the current is conducted to the metal flange or other structure at the root of the blade through the internal lightning protection wire (down conductor) of the blade, and then guided to the ground through the lightning protection system of the fan itself, to constrain lightning and protect the blade. The installation and positioning of the blade lightning receptor base seriously affect the lightning protection effect of the lightning protection system of the blade. The positioning of the lightning receptor base has very high requirements, and the axial position, chordwise position, angle and height of the lightning receptor base must meet the design requirements. If the position or angle is offset, it will cause the subsequent installation of the lightning receptor to also be offset, causing difficulty in installing the lightning receptor, and there is a potential risk of increasing resistance, poor lightning protection, causing the blade to be struck by lightning, and causing great economic loss.

[0004] The down conductor connection at the base of the existing blade cross lightning receptor is disconnected and then crimped separately. This connection method may cause the down conductor to break at the crimping position after long-term operation of the fan, causing lightning protection failure, and there are special-shaped down conductor connection structures at both ends of the base. The connection method of the special-shaped structure and the base is mostly welding or integral injection molding. The former has a risk of structural reliability, and the latter has a high cost. The blade branch lightning receptor base also has a special-shaped down conductor connection structure, and the connection method is also welding or integral injection molding. The former has a risk of structural reliability, and the latter has a high cost and is not convenient to replace.

[0005] CN212838186U discloses a wind power blade body lightning receptor, which comprises a lightning receptor base arranged in a wind power blade shell, lightning receptor studs threadedly connected with the wind power blade shell at both ends, and a cable, the shell comprises a PS shell and a SS shell, the PS shell and the SS shell are respectively provided with positioning holes at preset positions, the positioning holes are filled with glass fiber cloth, the lightning receptor base is located in the shell, a through hole parallel to the horizontal plane is formed in the lightning receptor base, the through hole of the lightning receptor base is filled with PVC core material, the lightning receptor stud is a cylinder with self-tapping threads at both ends, the lightning receptor stud passes through the through hole of the lightning receptor base and is fixed on the PS shell and the SS shell respectively, and the lightning receptor base is connected with the cable.

[0006] CN112727711A discloses a wind turbine blade lightning protection device, which comprises a tip lightning receptor arranged at the tip of a wind power blade, the tip lightning receptor is connected with the lightning protection system of a wind turbine through a cable, the cable is wrapped with a heat shrink tube, an insulating sleeve is arranged at the connection between the tip lightning receptor and the cable, and the insulating sleeve wraps the tail of the tip lightning receptor and the part connected with the cable. The wind turbine blade lightning protection device can reduce the risk of lightning strike on the blade body caused by the electrical connection part of the lightning protection system of the wind power blade. The application considers the root end fixing structure of the lightning protection down conductor, and focuses on eliminating the mechanical stress of the root end fixing. And solve the problem of easy fracture of the pressure connection of the high-voltage down conductor disconnected at the lightning receptor base of the blade cross.

[0007] In summary, how to design a lightning protection system structure with increased reliability, reduce the risk of lightning protection failure, and improve the safety performance of the wind turbine operation is a problem that needs to be solved at the moment. Practical new type content

[0008] The utility model discloses to solve the above-mentioned problem, provides a kind of wind power blade body lightning receptor fixing device, directly to the cylindrical blade cross lightning receptor base arc surface center position offset certain distance punch hole, and groove slot is opened in the outside of through hole, can avoid after high-voltage down conductor is disconnected and is pressed, improve the high-voltage down conductor flow capacity, while, integral high-voltage down conductor increases the structural reliability of lightning protection system, reduces the risk of lightning protection failure, improves the safety performance of the wind turbine operation.

[0009] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0010] The utility model provides a kind of wind power blade blade body lightning arrester fixing device, including body and the groove for fixing down lead of setting in the edge of body, the groove includes through-hole and slot, the through-hole is arranged in the position by body center and edge offset, the slot is connected through-hole and the blade mounting space outside body, to avoid the high voltage down lead is disconnected after crimping, enhance the structural reliability of lightning protection system.

[0011] The wind power blade blade body lightning arrester fixing device according to the structure of high-voltage down lead designs a cable without cutting, which can significantly increase the reliability of the lightning protection system, reduce the risk of lightning protection failure, and firmly fix the down lead in the through-hole, improve the installation efficiency. Avoiding the high-voltage down lead is disconnected and crimped separately, the integrated down lead structure of the utility model enhances the reliability, and there is no special-shaped structural member, reducing the cost.

[0012] Further, the body is cylindrical or rectangular block, and the body includes at least two opposite fixing surfaces connected by outwardly protruding mounting wings. This structure design can provide two mutually parallel planes in the body, which is helpful for fixing in the wind power blade space and further enhances the installation reliability.

[0013] Further, the mounting wing and the body are connected by an inwardly recessed transition arc surface. This design can effectively ensure the connection process of the mounting wing and the body, and can reduce stress concentration and fatigue failure caused by stress concentration.

[0014] Further, the mounting wing includes a body connecting end and a clamping end, and the vertical thickness of the body connecting end is consistent with the thickness of the clamping end, both of which are less than the vertical thickness of the body. This structure is convenient for processing and improves the processing efficiency.

[0015] Further, the vertical thickness of the mounting wing is less than the vertical thickness of the body.

[0016] Further, the transverse width of the mounting wing is greater than or equal to the transverse width of the body.

[0017] Further, the slot is a rectangular gap, and the through-hole is circular or elliptical in structure; the upper and lower widths of the rectangular gap are less than the distance in the upper and lower directions of the through-hole.

[0018] Further, the inner wall diameter of the through-hole is greater than the outer diameter of the stripped down lead.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The utility model discloses a wind power blade blade lightning arrester fixing device, first high voltage down lead is stripped and is handled, and according to the size of the exposed conductor, the through hole is punched in the arc surface center position of cylindrical blade cross lightning arrester base offset certain distance, and the slot is opened outside the through hole, then the stripped and handled conductor is put into the air from the slot edge, and it is pressed tightly through certain mode, secondly, the branch down lead is stripped and handled, and the through hole is punched in the arc surface center position of cylindrical blade branch lightning arrester base offset certain distance, and is directly pressed with the branch down lead.

[0021] The utility model discloses a wind power blade blade lightning arrester fixing device sets up the body and the wing plate, and the body mainly plays the connection and the support effect, and the wing plate is used for connecting down lead, and through the slot of the wing plate edge setting, can directly from the slot place down lead plug into the through -hole fixed, realizes the fixation and the connection of down lead under the condition of not destroying the conductor, guarantees the through -flow capacity of down lead. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 It is the three-dimensional structure schematic diagram of the wind power blade blade lightning arrester fixing device of the utility model.

[0023] Fig. 2 It is the structure main view of the wind power blade blade lightning arrester fixing device of the utility model.

[0024] In the drawing: 1-the body, 11-fixed surface, 2-groove body, 21-through -hole, 22-slot, 3-installation wing. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is combined with the attached Figs. 1-2 And specific embodiment, further detailed explanation of the utility model is carried out.It should be understood that the specific embodiment described here is only used to explain the utility model, and does not constitute the limitation to the utility model. Example 1

[0026] As Figs. 1-2 Shown, the wind power blade blade lightning arrester fixing device in the embodiment of the utility model is based on the existing cylindrical blade cross lightning arrester base, and the structure is improved from the actual high voltage down lead installation.

[0027] Specifically, including the body 1 and the groove body 2 for fixing down lead of setting on the edge of the body 1, the groove body 2 includes through -hole 21 and slot 22, and the through -hole 21 is arranged in the position offset from the center to the edge of the body 1, and the slot 22 is connected with the blade installation space outside the body 1 to avoid the high voltage down lead after being disconnected and being pressed, and the structural reliability of lightning protection system is enhanced.

[0028] The body 1 in the embodiment can be cylindrical or rectangular block, preferably cylindrical, the body 1 at least includes two opposite fixed surfaces 11, two fixed surfaces are connected by outwardly convex mounting wing 3. The mounting wing 3 and the body 1 are connected by the concave transition arc surface. The transition arc surface connects each surface, so that the entire fixing device cannot appear stress concentration due to sharp corner structure, and is not easy to damage in use. This structure can make the entire fixing device simple to manufacture, and the use reliability is relatively high. The mounting wing 3 includes body connecting end and clamping end, the vertical thickness of the body connecting end is consistent with the thickness of the clamping end, and both are less than the vertical thickness of the body 1. This structure can effectively reduce the manufacturing cost, realize the use value of the entire fixing device, and ensure the lightweight requirement. The vertical thickness of the mounting wing 3 is less than the vertical thickness of the body 1. The transverse width of the mounting wing 3 is greater than or equal to the transverse width of the body 1. This structure is more suitable for the connection of high-voltage down lead, and the size limitation between the mounting wing 3 and the body 1 is more conducive to the fixation of high-voltage down lead. The slot 22 is a rectangular gap, and the through hole 21 is a circular or elliptical structure; the upper and lower widths of the rectangular gap are less than the distance in the upper and lower directions of the through hole 21. The inner wall diameter of the through hole 21 is greater than the outer diameter of the down lead after stripping. This arrangement can directly insert the down lead into the through hole 21 from the slot 22 for fixation, realize the fixation and connection of the down lead without damaging the conductor, and ensure the flow capacity of the down lead.

[0029] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model. Those skilled in the art can change, modify, replace and deform the above-mentioned embodiments within the scope of the utility model.

[0030] The specific embodiments of the utility model above do not constitute the limitation of the protection scope of the utility model. Any various other corresponding changes and deformations made according to the technical concept of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A wind turbine blade shell lightning receptor fixing device, characterized in that, The utility model relates to a lightning down conductor fixing device, including body (1) and set up in the edge of body (1) for fixing down conductor's groove (2), the groove includes through -hole (21) and slot (22), the through -hole (21) is arranged in the position by the body (1) center and is offset to the edge, the slot (22) is communicated through -hole (21) and the vane installation space outside body (1), to avoid the high -voltage down conductor after breaking off and crimping, enhance the structural reliability of lightning protection system.

2. The wind turbine blade lightning receptor fastening device according to claim 1, characterized in that, The body (1) is cylindrical or rectangular block, the body (1) includes at least two opposite fixed surfaces (11), and the two fixed surfaces are connected by outwardly convex mounting wing (3).

3. The wind turbine blade lightning receptor fastening device according to claim 2, wherein, The mounting wing (3) and the body (1) are connected by concave transition arc surface.

4. The wind turbine blade lightning receptor fastening device according to claim 3, wherein, The mounting wing (3) includes body connecting end and clamping end, the vertical direction thickness of the body connecting end is consistent with the thickness of the clamping end, and the vertical direction thickness of the body connecting end and the clamping end is less than the vertical direction thickness of the body (1).

5. The wind turbine blade lightning receptor fastening device according to claim 4, wherein, The vertical direction thickness of the mounting wing (3) is less than the vertical direction thickness of the body (1).

6. The wind turbine blade lightning receptor fastening device according to claim 5, wherein, The transverse width of the mounting wing (3) is greater than or equal to the transverse width of the body (1).

7. The wind turbine blade lightning receptor fastening device according to claim 6, wherein, The slot (22) is rectangular gap, and the through -hole (21) is circular or elliptical structure;The upper and lower width of the rectangular gap is less than the distance in the upper and lower direction of the through -hole (21).

8. The wind turbine blade lightning receptor fixation device according to claim 7, characterized in that, The inner wall diameter of the through -hole (21) is greater than the outer diameter after the skin of the down conductor is removed.

Images