Wind power plant fan lightning protection device

Abstract

The utility model provides a wind power plant fan lightning protection device which comprises a base, the bottom of the base is fixedly connected with a fixing disc, the top of the base is fixedly connected with a flow guide ring, and an air guide hole which is integrally of an L-shaped structure is formed between the base and the flow guide ring. The device has the advantages that when wind blows to the device, air flow in the horizontal direction enters the air guide holes under the guidance of the guide plates, the air flow turns in the air guide holes to form vertical air flow, and the influence of wind power on the device is reduced. The vertical airflow is blown out upwards, and the horizontal airflow above can be disturbed, so that the influence of the horizontal airflow can be further reduced. The windproof column is rotationally connected to the base through the rotating ring, so that the windproof column can rotate under the action of wind power. Wind energy can be converted into kinetic energy through rotation of the windproof columns, and consumption of the wind energy is achieved. The supporting rod, the lightning arrester and other structures are protected by the base, the windproof column and other structures, the influence of wind force on the supporting rod, the lightning arrester and other structures can be greatly reduced, and the firmness of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine lightning protection, in particular to a wind turbine lightning protection device in a wind farm. Background Art

[0002] A wind farm is a power station consisting of a group of wind turbines, power transmission and transformation equipment, and related buildings. Since most wind farms are deployed in open areas, the height of the wind turbines in the wind farms and the special environment in which they are located make the wind turbines extremely vulnerable to direct lightning strikes during thunderstorms. Lightning rods are usually installed high up on the wind turbine nacelle to provide protection for the wind turbines.

[0003] In existing technology, lightning rods for wind turbines are installed high above the wind turbine nacelle to attract nearby lightning currents and provide protection for the wind turbine. Due to the unique installation environment of lightning rods, which are exposed to high winds for extended periods, the mounting joints are more susceptible to loosening. After long-term use, the rods may even fall off, leaving mounting reliability in need of improvement. To address this issue, an improved lightning protection device for wind turbines in wind farms is provided. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0005] Therefore, one purpose of the present invention is to provide a lightning protection device for wind turbines in a wind farm, so as to solve the problems mentioned in the background art and overcome the deficiencies in the prior art.

[0006] To achieve the above-mentioned objectives, an embodiment of the present invention provides a lightning protection device for a wind turbine in a wind farm, comprising a base, a fixing plate fixedly connected to the bottom of the base, a guide ring fixedly connected to the top of the base, an air guide hole with an overall L-shaped structure defined between the base and the guide ring, a guide plate fixedly connected to the top of the base, and an air inlet hole connected to the air guide hole defined on the side of the guide ring;

[0007] A windproof column is provided in the base, and the bottom end of the windproof column is fixedly connected to a rotating ring provided in the base. A support rod is inserted in the windproof column, the top end of the support rod is fixedly connected to a lightning receptor, and the bottom end of the support rod is fixedly connected to a fixing plate. A down conductor connected to the lightning receptor is provided in the support rod, and a grounding body is provided at the bottom end of the down conductor.

[0008] Preferably, from any of the above solutions, the base adopts a cylindrical structure, and the fixing plate is provided with a plurality of fixing holes evenly arranged around the circumference.

[0009] Preferably, from any of the above schemes, the guide ring adopts a cylindrical structure coaxial with the base, and there are a plurality of air guide holes which are evenly arranged on the inner circumference of the base.

[0010] The above technical solution adopts the following: the base provides a mounting platform for the superstructure, and a fixing plate is installed at its bottom. The fixing plate can be used with tools such as bolts to fix the device to the fan. Several fixing holes are evenly distributed around the circumference of the fixing plate, which can ensure the device is fixed to the fan in a balanced and stable manner. The guide ring provides space for the air guide holes, which are used to guide the airflow. Its L-shaped structure can convert horizontal airflow into vertical airflow, thereby reducing the impact of horizontal airflow on the device. The vertical airflow blows upward and disrupts the horizontal airflow above, further reducing the impact of horizontal airflow.

[0011] Preferably, any of the above solutions is that the turning point of the air guide hole is rounded, and the aperture of the vertical section of the air guide hole gradually decreases from bottom to top.

[0012] Preferably, from any of the above schemes, the guide plate is arranged obliquely upward from the inside to the outside, and there are a plurality of air inlet holes which are evenly arranged along the thickness and circumferential direction of the guide ring.

[0013] The above technical solution is adopted: the turning point of the air guide hole is rounded to make the airflow entering it turn more smoothly. The aperture of the vertical section of the air guide hole gradually decreases from bottom to top, which can make the airflow blow upward at a faster speed, thereby further expanding its impact on the horizontal airflow and thus improving the windproof effect of the device. The guide plate is used to guide the external airflow. Its oblique setting allows more horizontal airflow to enter the air guide hole. The air inlet hole is opened on the side of the guide ring, which has a similar function to the air guide hole, further expanding the absorption range of the horizontal airflow and further improving the windproof ability of the device.

[0014] Preferably, any of the above schemes adopts a diamond-shaped structure, and the edges and corners of the windproof column are rounded.

[0015] Preferably, from any of the above solutions, a plurality of balls attached to the inner wall of the base are embedded in the side and bottom surfaces of the rotating ring.

[0016] Using this technical solution, a windbreak provides wind protection for the support pole. The windbreak is connected to the base via a rotating ring, allowing it to rotate in response to wind. This rotation converts wind energy into kinetic energy, effectively consuming it. The windbreak's diamond-shaped structure ensures that, regardless of wind direction, the rotating ring allows it to face the wind with its narrower side, thus reducing wind force on the device. Ball bearings are installed on the sides and bottom of the rotating ring to ensure smoother rotation.

[0017] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0018] 1. This wind farm wind turbine lightning protection device comprises a base, a fixed plate, a guide ring, air guide holes, an air inlet, a wind shield, and a rotating ring. During use, the fixed plate is fixed to the wind turbine, and then the fixed plate is fixed to the wind turbine. When wind blows onto the device, the horizontal airflow is guided by the guide plate into the air guide holes, where it is redirected to form a vertical airflow, reducing the impact of wind on the device. The vertical airflow blows upward, disrupting the horizontal airflow above, further reducing the impact of the horizontal airflow. The wind shield is rotatably connected to the base via a rotating ring, allowing it to rotate in response to wind. The rotation of the wind shield converts wind energy into kinetic energy, thereby consuming the wind energy. Structures such as the support pole and lightning receptor are protected by the base, wind shield, and other structures, significantly reducing the impact of wind on them and improving the reliability of the device.

[0019] 2. The wind turbine lightning protection device for this wind farm features rounded corners at the guide holes, ensuring smoother airflow. The diameter of the vertical section of the guide holes gradually decreases from bottom to top, allowing airflow to flow upward at a faster rate, further expanding its impact on horizontal airflow and improving the device's wind protection. Air inlet holes on the side of the guide ring function similarly to the guide holes, further expanding the range of horizontal airflow and enhancing the device's wind protection capabilities. Ball bearings are placed on the sides and bottom of the rotating ring to ensure smoother rotation.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic structural diagram of the utility model from a first perspective;

[0023] Figure 2 This is a schematic diagram of the structure of the utility model from a second perspective;

[0024] Figure 3 It is a schematic diagram of the cutaway structure of the present utility model.

[0025] In the figure: 1-base, 2-fixed plate, 3-guide ring, 4-air guide hole, 5-guide plate, 6-air inlet hole, 7-windproof column, 8-rotating ring, 9-support rod, 10-lightning receptor, 11-fixed plate, 12-down conductor. DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] like Figures 1 to 3 As shown, the utility model includes a base 1, a fixing plate 2 is fixedly connected to the bottom of the base 1, a guide ring 3 is fixedly connected to the top of the base 1, an air guide hole 4 with an overall L-shaped structure is opened between the base 1 and the guide ring 3, a guide plate 5 is fixedly connected to the top of the base 1, and an air inlet hole 6 connected to the air guide hole 4 is opened on the side of the guide ring 3;

[0029] A windproof column 7 is provided in the base 1, and the bottom end of the windproof column 7 is fixedly connected to a rotating ring 8 provided in the base 1. A support rod 9 is inserted in the windproof column 7, and the top of the support rod 9 is fixedly connected to a lightning receptor 10, and the bottom end of the support rod 9 is fixedly connected to a fixing plate 11. A down conductor 12 connected to the lightning receptor 10 is provided in the support rod 9, and a grounding body is provided at the bottom end of the down conductor 12.

[0030] Example 1: The base 1 adopts a cylindrical structure, and a plurality of fixing holes evenly arranged around the circumference are provided on the fixed disk 2. The guide ring 3 adopts a cylindrical structure coaxial with the base 1, and has a plurality of air guide holes 4 evenly arranged around the circumference of the base 1. The base 1 provides a mounting platform for the upper structure, and a fixed disk 2 is provided at the bottom thereof. The fixed disk 2 can be used to fix the device on the fan with tools such as bolts. A plurality of fixing holes evenly arranged around the circumference are provided on the fixed disk 2, so that the device can be fixed on the fan in a balanced and stable manner. The guide ring 3 provides space for the air guide holes 4, which are used to guide the airflow. The L-shaped structure can convert the horizontal airflow into a vertical airflow, thereby reducing the impact of the horizontal airflow on the device. The vertical airflow is blown upward and can also disrupt the horizontal airflow above, thereby further reducing the impact of the horizontal airflow.

[0031] Example 2: The turning point of the air guide hole 4 is rounded, and the aperture of the vertical section of the air guide hole 4 gradually decreases from bottom to top. The guide plate 5 is set obliquely upward from the inside to the outside, and there are several air inlet holes 6 that are evenly arranged along the thickness and circumference of the guide ring 3. The turning point of the air guide hole 4 is rounded, which can make the airflow entering it turn more smoothly. The aperture of the vertical section of the air guide hole 4 gradually decreases from bottom to top, which can make the airflow blow upward at a faster speed, thereby further expanding its influence on the horizontal airflow, and further improving the windproof effect of the device. The guide plate 5 is used to guide the external airflow, and its oblique setting can allow more horizontal airflow to enter the air guide hole 4. The air inlet hole 6 is opened on the side of the guide ring 3, which has a similar function to the air guide hole 4, further expanding the absorption range of the horizontal airflow and further improving the windproof ability of the device.

[0032] Example 3: The windproof column 7 adopts a diamond structure, and the edges and corners of the windproof column 7 are rounded. The side and bottom surfaces of the rotating ring 8 are embedded with a number of ball bearings attached to the inner wall of the base 1. The windproof column 7 provides windproof protection for the support rod 9. The windproof column 7 is rotatably connected to the base 1 through the rotating ring 8, so that it can rotate under the action of wind. The rotation of the windproof column 7 can convert wind energy into kinetic energy, thereby realizing the consumption of wind energy. The windproof column 7 adopts a diamond structure, so that no matter which direction the wind is facing, it can face the wind direction with a smaller width with the cooperation of the rotating ring 8, thereby reducing the wind force on the device. Ball bearings are arranged on the side and bottom surfaces of the rotating ring 8 to make the rotating ring 8 smoother when rotating.

[0033] The working principle of this utility model is as follows:

[0034] S1. Fix the fixing plate 11 to the wind turbine, and then fix the fixing plate 2 to the wind turbine. The lightning receptor 10 cooperates with the down conductor and the grounding body to realize lightning protection for the wind turbine;

[0035] S2. When wind blows onto the device, the horizontal airflow enters the air guide hole 4 under the guidance of the guide plate 5. The airflow turns into a vertical airflow inside the air guide hole 4, reducing the impact of the wind on the device. The vertical airflow blows upward and disrupts the horizontal airflow above, thus further reducing the impact of the horizontal airflow.

[0036] S3. The windproof column 7 is rotatably connected to the base 1 through the rotating ring 8, so that it can rotate under the action of wind. The rotation of the windproof column 7 can convert wind energy into kinetic energy, thereby consuming wind energy.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. This wind turbine lightning protection device for a wind farm comprises a base 1, a fixed plate 2, a guide ring 3, air guide holes 4, an air inlet 6, a wind shield 7, and a rotating ring 8. During use, the fixed plate 11 is fixed to the wind turbine, and the fixed plate 2 is then fixed to the wind turbine. When wind strikes the device, the horizontal airflow, guided by the guide plate 5, enters the air guide holes 4. The airflow then turns inside the air guide holes 4 to form a vertical airflow, reducing the impact of wind on the device. This vertical airflow blows upward, disrupting the horizontal airflow above, further reducing the impact of the horizontal airflow. The wind shield 7 is rotatably connected to the base 1 via the rotating ring 8, allowing it to rotate in response to wind. The rotation of the wind shield 7 converts wind energy into kinetic energy, thereby consuming the wind energy. Structures such as the support rod 9 and the lightning receptor 10 are protected by the base 1 and the wind shield 7, significantly reducing the impact of wind on them and improving the reliability of the device.

[0039] 2. In the lightning protection device for wind turbines in wind farms, the corners of the air guide holes 4 are rounded to allow the airflow entering therein to turn more smoothly. The aperture of the vertical section of the air guide holes 4 gradually decreases from bottom to top, allowing the airflow to blow upward at a faster speed, thereby further expanding its impact on the horizontal airflow and thus improving the windproof effect of the device. An air inlet hole 6 is provided on the side of the guide ring 3, which has a similar function to the air guide hole 4, further expanding the absorption range of the horizontal airflow and further improving the windproof ability of the device. Ball bearings are provided on the side and bottom of the rotating ring 8 to make the rotating ring 8 more smooth when rotating.

Claims

1. A lightning protection device for a wind turbine in a wind farm, comprising a base (1); characterized in that: The bottom of the base (1) is fixedly connected to a fixed plate (2), the top of the base (1) is fixedly connected to a guide ring (3), an air guide hole (4) with an overall L-shaped structure is provided between the base (1) and the guide ring (3), the top of the base (1) is fixedly connected to a guide plate (5), and an air inlet hole (6) in communication with the air guide hole (4) is provided on the side of the guide ring (3); A windproof column (7) is provided in the base (1); the bottom end of the windproof column (7) is fixedly connected to a rotating ring (8) provided in the base (1); a support rod (9) is inserted in the windproof column (7); the top end of the support rod (9) is fixedly connected to a lightning receptor (10); the bottom end of the support rod (9) is fixedly connected to a fixing plate (11); a down conductor (12) connected to the lightning receptor (10) is provided in the support rod (9); and a grounding body is provided at the bottom end of the down conductor (12).

2. A wind farm wind turbine lightning protection device according to claim 1, characterized in that: The base (1) adopts a cylindrical structure, and the fixing plate (2) is provided with a plurality of fixing holes evenly arranged around the circumference.

3. A lightning protection device for wind turbines in a wind farm according to claim 2, characterized in that: The guide ring (3) adopts a cylindrical structure coaxial with the base (1), and there are a plurality of air guide holes (4) which are evenly arranged on the inner circumference of the base (1).

4. A lightning protection device for wind turbines in a wind farm according to claim 3, characterized in that: The turning portion of the air guide hole (4) is rounded, and the aperture of the vertical section of the air guide hole (4) gradually decreases from bottom to top.

5. A lightning protection device for wind turbines in a wind farm according to claim 4, characterized in that: The guide plate (5) is arranged obliquely upward from the inside to the outside, and there are a plurality of air inlet holes (6) which are evenly arranged along the thickness and circumferential direction of the guide ring (3).

6. A lightning protection device for wind turbines in a wind farm according to claim 5, characterized in that: The windproof column (7) adopts a diamond structure, and the corners of the windproof column (7) are rounded.

7. A lightning protection device for wind turbines in a wind farm according to claim 6, characterized in that: The side surfaces and bottom surface of the rotating ring (8) are both embedded with a plurality of balls arranged on the inner wall of the base (1).

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