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CN-224228791-U - Sectional lightning protection structure for wind power blade

CN224228791UCN 224228791 UCN224228791 UCN 224228791UCN-224228791-U

Abstract

The utility model relates to the technical field of wind power blade lightning protection and discloses a wind power blade sectional lightning protection structure which comprises a cabin, wherein the front end of the cabin is fixedly connected with a hub, the outer side of the hub is fixedly connected with a plurality of evenly distributed rear blades, the front end of each rear blade is fixedly connected with a front blade, the front end of each front blade is provided with a lightning protection assembly, the lightning protection assembly comprises a lightning receptor, the lightning receptor is in threaded connection with the middle part of the front end of each front blade, the top end of the lightning receptor is in sliding connection with a lightning receiving probe, the outer side of the front end of each front blade is in threaded connection with a plurality of evenly distributed metal probes, the bottom of the periphery of the lightning receptor is fixedly connected with a waterproof ring, and the bottom end of the lightning receptor is electrically connected with a grounding lead. According to the utility model, the lightning receptor and the metal probe are respectively connected with the front end of the front blade in a threaded manner, and the blade sections do not need to be disassembled when damaged, so that the blade sections can be quickly replaced through threads, the maintenance time is shortened, and the maintenance cost is reduced.

Inventors

  • HE YONGXIN
  • DING YI
  • SONG WENQIANG
  • SUN JUN
  • WAN DENGXIANG
  • ZHUANG YAN
  • DOU HANG

Assignees

  • 国能国华(广西)新能源有限公司
  • 北京乾源风电科技有限公司

Dates

Publication Date
20260512
Application Date
20250715

Claims (8)

  1. 1. The wind power blade sectional type lightning protection structure comprises a fixed base (1) and is characterized in that a tower barrel (2) is fixedly connected to the top of the fixed base (1), a cabin (3) is fixedly connected to the top of the tower barrel (2), a hub (4) is fixedly connected to the front end of the cabin (3), a plurality of evenly distributed rear blades (5) are fixedly connected to the outer side of the hub (4), front blades (6) are fixedly connected to the front ends of the rear blades (5), and a lightning protection assembly is arranged at the front ends of the front blades (6); The lightning protection assembly comprises a lightning arrester (10), the lightning arrester (10) is in threaded connection with the middle of the front end of the front blade (6), a lightning arrester probe (12) is slidably connected with the top end of the lightning arrester (10), a plurality of evenly distributed metal probes (7) are in threaded connection with the outer side of the front end of the front blade (6), a waterproof ring (13) is fixedly connected with the bottom of the periphery of the lightning arrester (10), the waterproof ring (13) is abutted to the middle of the front end of the front blade (6), a grounding lead (9) is electrically connected with the bottom end of the lightning arrester (10), and the grounding lead (9) is installed inside the front blade (6).
  2. 2. The wind power blade sectional lightning protection structure according to claim 1, wherein a plurality of uniformly distributed miniature electric field intensity sensors (14) are fixedly connected to the outer side of the front end of the front blade (6), limit sliding blocks (19) distributed left and right are fixedly connected to the outer side of the lightning receiving probe (12), a motor (15) is installed in the lightning receiving device (10), and a threaded transmission rod (16) is fixedly connected to the driving end of the motor (15).
  3. 3. The sectional lightning protection structure of a wind power blade according to claim 2, wherein a lifting groove (20) is formed in the top of the lightning receptor (10), and the lightning receptor probe (12) is slidably connected in the lifting groove (20).
  4. 4. The wind power blade sectional lightning protection structure according to claim 2, wherein limiting telescopic grooves (18) are formed in the left side and the right side of the inside of the lightning receptor (10), and the limiting sliding blocks (19) are slidably connected in the limiting telescopic grooves (18).
  5. 5. The wind power blade sectional lightning protection structure according to claim 2, wherein a threaded expansion groove (17) is formed in the bottom of the lightning receiving probe (12), and the threaded transmission rod (16) is in threaded connection with the threaded expansion groove (17).
  6. 6. The wind power blade sectional lightning protection structure according to claim 1, wherein a plurality of evenly distributed threaded holes I (8) are formed in the outer side of the front end of the front blade (6), and the metal probe (7) is in threaded connection with the threaded holes I (8).
  7. 7. The wind power blade sectional lightning protection structure according to claim 1 is characterized in that a threaded hole II (11) is formed in the middle of the front end of the front blade (6), and the lightning receptor (10) is in threaded connection with the threaded hole II (11).
  8. 8. The wind power blade sectional lightning protection structure according to claim 1, wherein the bottom end of the metal probe (7) is in a threaded shape, and the bottom end of the lightning receptor (10) is in a threaded shape.

Description

Sectional lightning protection structure for wind power blade Technical Field The utility model relates to the technical field of wind power blade lightning protection, in particular to a sectional lightning protection structure of a wind power blade. Background Wind energy is pollution-free energy, and China has a large number of areas with abundant wind energy resources such as coastal islands, grassland pastures, mountainous areas, highland areas and the like, so that the construction of wind power projects is greatly accelerated, the wind power generation device has important significance for adjusting energy structures and converting economic development modes in China, and lightning stroke is frequently suffered in thunder and rain days because the wind power generation device is arranged in a open field area, so that the lightning protection device is arranged on blades of the wind power generator. Traditional lightning receptor and metal probe all adopt fixed installation, when these parts appear damaging, need disassemble whole blade segmentation and just can change, lead to maintenance cycle extension, cost surge, traditional fixed length's lightning receiving probe can't carry out dynamic adjustment in addition, easily appear receiving the flashing blind area, probe overlength leads to the windage to increase when weak thunderstorm, and the probe is too short then receives the flashing ability not enough when strong thunderstorm leads to thunderbolt to strike around blade main part, can use a wind-powered electricity generation blade sectional type lightning protection structure to solve this kind of problem for this reason. Disclosure of utility model In order to make up for the defects, the utility model provides a wind power blade sectional lightning protection structure, which aims to solve the problems that in the prior art, after a lightning protection part is damaged, the whole blade section is required to be disassembled for maintenance, the maintenance period is long, the cost is high, a fixed-length lightning receiving probe cannot be dynamically adjusted, and a lightning receiving blind area is easy to occur. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The wind power blade sectional lightning protection structure comprises a fixed base and is characterized in that a tower barrel is fixedly connected to the top of the fixed base, a cabin is fixedly connected to the top of the tower barrel, a hub is fixedly connected to the front end of the cabin, a plurality of evenly distributed rear blades are fixedly connected to the outer side of the hub, front blades are fixedly connected to the front ends of the rear blades, and a lightning protection assembly is arranged at the front ends of the front blades; The lightning protection assembly comprises a lightning receiver, wherein the lightning receiver is in threaded connection with the middle part of the front end of the front blade, the top end of the lightning receiver is in sliding connection with a lightning receiving probe, the outer side of the front end of the front blade is in threaded connection with a plurality of uniformly distributed metal probes, the bottom of the periphery of the lightning receiver is fixedly connected with a waterproof ring, the waterproof ring is abutted to the middle part of the front end of the front blade, the bottom end of the lightning receiver is electrically connected with a grounding lead, and the grounding lead is installed inside the front blade; As a further description of the above technical solution: The outer side of the front end of the front blade is fixedly connected with a plurality of uniformly distributed miniature electric field intensity sensors, the outer side of the lightning receiving probe is fixedly connected with left and right distributed limit sliding blocks, a motor is arranged in the lightning receiving device, and a screw drive rod is fixedly connected with the motor drive end; As a further description of the above technical solution: the top of the lightning receptor is provided with a lifting groove, and the lightning receptor probe is connected in the lifting groove in a sliding way; As a further description of the above technical solution: limiting telescopic grooves are formed in the left side and the right side of the inside of the lightning receptor, and the limiting sliding blocks are connected in the limiting telescopic grooves in a sliding mode; As a further description of the above technical solution: The bottom of the lightning receiving probe is provided with a threaded expansion groove, and the threaded transmission rod is in threaded connection with the threaded expansion groove; As a further description of the above technical solution: the outer side of the front end of the front blade is provided with a plurality of threaded holes I which are uniformly distributed, and the metal probe is in threaded con