Lightning protection device for blade tip of wind driven generator

Abstract

The utility model discloses a lightning protection device for a blade tip of a wind driven generator, which relates to the technical field of lightning protection appliances for wind power generation and comprises a blade, a blade tip protection sleeve is mounted outside the blade tip at the front end of the blade, and an adapter is mounted at the rear end of the blade; according to the utility model, through cooperation of the second lightning arresters and the conductive shafts, the lightning arresters can absorb lightning when the blade is struck by lightning, and then the lightning is conducted to a ground wire through the conductive shafts, so that the blade has a lightning protection function; and through cooperation of a copper net and a first lightning arrester, power can be conveniently transmitted to the copper net by the protection sleeve after the blade tip is struck by lightning and then transmitted to a ground wire through the conductive shaft, the blade tip is prevented from being directly damaged by lightning stroke, and finally the problems that the wind turbine is frequently struck by lightning stroke and the blade tip is extremely prone to faults after being struck by lightning stroke are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power lightning protection appliance technical field especially relates to a wind driven generator blade tip lightning protection device. BACKGROUND

[0002] With the development of clean energy, wind power as a green, non-polluting typical clean energy, has been people's growing attention. Wind driven generator is an important equipment of wind power, which integrates wind energy capture and energy conversion. Generally, wind driven generator is wind wheel under the action of wind force, which converts wind kinetic energy into mechanical energy of wind wheel shaft, drives generator rotor to rotate through the generator, and converts mechanical energy into electrical energy. Wind driven generator is usually installed in the high semi-space, and there are few buildings nearby, so there are no other tall objects to attract lightning, which causes wind driven generator to be frequently struck by lightning. The tip of the blade is the highest position and is most vulnerable to lightning strikes. The tip is relatively fragile and is prone to failure after lightning strike. Therefore, the above problems need to be solved. SUMMARY

[0003] The utility model discloses a wind driven generator blade tip lightning protection device to solve the problems in the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model discloses a wind driven generator blade tip lightning protection device, which comprises a blade, a blade tip protection sleeve is installed on the front end of the blade tip, and an adapter is installed at the rear end of the blade.

[0005] Preferably, the rear end of the blade tip protection sleeve is provided with two second installation grooves, and four second bolts are installed on the inside of the two sides of the second installation grooves. The proximal end of the second bolt is installed in the front end of the blade tip, and the distal end of the second bolt is provided with a second sealing sleeve. The second sealing sleeve is located in the second installation groove, and the copper net abuts against the front end surface of the blade.

[0006] Preferably, the front end surface of the blade tip protection sleeve is provided with a movable groove matched with the first lightning arrester, and a copper net is installed on the longitudinal front end of the front end surface of the blade. The inner side of the copper net abuts against the first lightning arrester.

[0007] Preferably, a third installation groove is provided in the blade, and a conductive shaft is installed in the third installation groove. The front end of the conductive shaft is connected with the first lightning arrester, and the rear end of the conductive shaft is connected with the adapter.

[0008] Preferably, a plurality of second lightning receptors are equidistantly mounted on the upper and lower ends of the conductive shaft, the second lightning receptors penetrate the blades at both ends, and the second lightning receptors are connected with the conductive shaft.

[0009] Compared with the prior art, the utility model has the beneficial effects that: through the cooperation of the second lightning receptor and the conductive shaft, the lightning receptor can absorb lightning when the blade is struck by lightning, and then the lightning is conducted to the ground wire through the conductive shaft, so that the blade itself has a lightning protection function; through the cooperation of the copper net and the first lightning receptor, the power is transmitted to the copper net through the protective sleeve after the blade tip is struck by lightning, and then the power is transmitted to the ground wire through the conductive shaft, so that the blade tip is prevented from being directly damaged by lightning, and finally the problem that the wind turbine is frequently struck by lightning and the blade tip is prone to failure after being struck by lightning is solved. BRIEF DESCRIPTION OF DRAWINGS

[0010] The accompanying drawings, which are included to provide a further understanding of the utility model, form a part of the application and serve to explain the utility model together with the specification. The illustrative embodiments of the utility model and its description serve to explain the utility model without implying any limitation of the utility model. In the drawings:

[0011] Figure 1 It is a whole three-dimensional structure schematic view of the device proposed in the utility model;

[0012] Figure 2 It is a blade tip protective sleeve structure schematic view proposed in the utility model;

[0013] Figure 3 It is a blade tip protective sleeve cross section structure schematic view proposed in the utility model;

[0014] Figure 4 It is a device internal structure schematic view proposed in the utility model;

[0015] Figure 5 It is a device internal structure schematic view proposed in the utility model; Figure 4 It is a structure amplification schematic view of A.

[0016] In the drawing, serial number: 1, blade; 2, adapter; 3, blade tip protective sleeve; 4, first bolt; 5, second bolt; 6, first sealing sleeve; 7, second sealing sleeve; 8, copper net; 9, first lightning receptor; 10, conductive shaft; 11, second lightning receptor. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments of the utility model.

[0018] Embodiment: refer to Figures 1-5The utility model discloses a wind driven generator blade tip lightning protection device, including blade 1, through blade 1 convenient rotation produces electric power, the blade tip of blade 1 front end is installed with blade tip protection sleeve 3, through blade tip protection sleeve 3 avoids that blade tip directly receives thunderbolt, the rear end of blade 1 is installed with adapter 2, through adapter 2 convenient connection blade 1 with wind driven generator, the front end of blade tip protection sleeve 3 is passed through and is set up two first installation slot, the inside both sides of two first installation slot all are installed with first bolt 4, through first bolt 4 and second bolt 5 convenient installation blade tip protection sleeve 3, the similar end of first bolt 4 is installed in blade 1 front end blade tip, and the far end of same side first bolt 4 is installed with first sealing sleeve 6, and first sealing sleeve 6 is located in first installation slot, the rear end of blade tip protection sleeve 3 is passed through and is set up two second installation slot, the inside both sides of two second installation slot all are installed with second bolt 5, the similar end of same side second bolt 5 is installed in blade 1 front end blade tip, and the far end of same side second bolt 5 is installed with second sealing sleeve 7, through the cooperation of first sealing sleeve 6 and second sealing sleeve 7 convenient sealing first installation slot with second installation slot, second sealing sleeve 7 is located in second installation slot.

[0019] In the utility model, copper net 8 is installed in the inside front end of blade tip protection sleeve 3, thunderbolt that blade tip protection sleeve 3 receives is conveniently transmitted to first lightning receptor 9 through copper net 8, the inside of copper net 8 abuts with first lightning receptor 9, electric power on copper net 8 is conveniently transmitted to conducting shaft 10 through first lightning receptor 9, and copper net 8 abuts at the front end surface of blade 1, the front end surface of blade 1 is set up with the movable slot of cooperation with first lightning receptor 9, and the front end surface of blade 1 is longitudinally through and is set up with third installation slot, and conducting shaft 10 is installed in third installation slot, thunder is conveniently transmitted to ground wire through conducting shaft 10, the front end of conducting shaft 10 is connected with first lightning receptor 9, the rear end of conducting shaft 10 is connected with adapter 2, a plurality of second lightning receptors 11 are installed on the upper and lower ends of conducting shaft 10 equidistantly, thunder that blade 1 receives is conveniently transmitted to conducting shaft 10 through second lightning receptor 11, two ends of second lightning receptor 11 are passed through blade 1, and second lightning receptor 11 is connected with conducting shaft 10.

[0020] Working principle: in the utility model for, before installing blade 1 on wind driven generator, through four first bolts 4 and four second bolts 5 install blade tip protection sleeve 3 at blade tip of blade 1, and install first sealing sleeve 6 and second sealing sleeve 7 correspondingly, sealing sleeve not only can strengthen the sealing property of device and avoid rainwater in rainy day to enter blade 1 corrosion, and can avoid bolt directly transmitting electric power to blade tip, subsequently install blade 1 on wind driven generator, when in thunderstorm weather, second lightning receptor 11 will attract thunder, and transmit thunder to conducting shaft 10, subsequently through ground wire exclusion, and blade tip protection sleeve 3 has the attribute of attracting thunder itself, when receiving thunder strike, copper net 8 will absorb electric power and transmit to conducting shaft 10, again through conducting shaft 10 guide thunder to the ground.

[0021] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto. Any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, and all of them should be covered within the protection scope of the present application.

Claims

1. A lightning protection device for the tip of a wind turbine blade, comprising a blade (1), characterized in that: The blade (1) has a blade tip protective sleeve (3) installed on the front tip of the blade (1), and an adapter (2) is installed on the rear end of the blade (1). The front end of the blade tip protective sleeve (3) has two first mounting grooves. Two first bolts (4) are installed on both sides of the interior of each of the two first mounting grooves. The proximal ends of the first bolts (4) on the same side are installed inside the blade tip of the blade (1), and the distal ends of the first bolts (4) on the same side are installed with first sealing sleeves (6). The first sealing sleeves (6) are located within the first mounting grooves. A copper mesh (8) is installed at the front end of the interior of the blade tip protective sleeve (3). The inner side of the copper mesh (8) abuts against a first lightning arrester (9), and the copper mesh (8) abuts against the front end of the blade (1). On the front end face of the blade (1), there is an active groove that cooperates with the first lightning rod (9), and a third mounting groove is longitudinally opened on the front end face of the blade (1). A conductive shaft (10) is installed in the third mounting groove. The front end of the conductive shaft (10) is connected to the first lightning rod (9), and the rear end of the conductive shaft (10) is connected to the adapter (2). Multiple second lightning rods (11) are installed at equal intervals at the upper and lower ends of the conductive shaft (10). The two ends of the second lightning rods (11) penetrate the blade (1), and the second lightning rods (11) are connected to the conductive shaft (10).

2. The wind turbine blade tip lightning protection device according to claim 1, characterized in that: The rear end of the blade tip protective sleeve (3) has two second mounting slots. Two second bolts (5) are installed on both sides of the interior of the two second mounting slots. The near ends of the second bolts (5) on the same side are installed inside the blade tip at the front end of the blade (1), and the far ends of the second bolts (5) on the same side are installed with second sealing sleeves (7). The second sealing sleeves (7) are located in the second mounting slots.

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