阅读说明：本技术 一种耐老化风力发电机叶片 (Anti-aging wind driven generator blade ) 是由 黎阜南 文峻峰 于 2021-01-28 设计创作，主要内容包括：本发明属于风力发电机技术领域,具体涉及一种耐老化风力发电机叶片,该风力发电机叶片安装在塔架上；所述风叶内部设置有空腔,风叶的一端开设有一号凹槽,另一端设有气管；所述气管的一端与空腔连通,另一端连接有气泵；所述一号凹槽底端固连有一号气膜,一号凹槽底端设置有一号气道；本发明通过一号气膜的设置,使得一号气膜与铁片和一号磁铁相互配合,在电磁感应器感应到飞禽撞击风叶端部之前,控制器能够控制气泵吹气,使得一号气膜充气伸展,铁片与一号磁铁相互吸引,从而使得一号气膜对风叶端部包裹,使得触碰到风叶尾端的飞禽被弹开,进而避免触碰到风叶尾端的飞禽被瞬间绞杀。(The invention belongs to the technical field of wind driven generators, and particularly relates to an anti-aging wind driven generator blade which is arranged on a tower; a cavity is formed in the fan blade, a first groove is formed in one end of the fan blade, and an air pipe is arranged at the other end of the fan blade; one end of the air pipe is communicated with the cavity, and the other end of the air pipe is connected with an air pump; the bottom end of the first groove is fixedly connected with a first air film, and a first air channel is arranged at the bottom end of the first groove; according to the invention, the first air film, the iron sheet and the first magnet are matched with each other through the arrangement of the first air film, before the electromagnetic inductor senses that the birds strike the end part of the fan blade, the controller can control the air pump to blow air, so that the first air film is inflated and extended, and the iron sheet and the first magnet are attracted with each other, so that the first air film wraps the end part of the fan blade, the birds touching the tail end of the fan blade are bounced off, and the birds touching the tail end of the fan blade are prevented from being instantly killed by winching.)

1. An aging-resistant wind turbine blade, the wind turbine blade being mounted on a tower, characterized in that: a cavity (11) is arranged in the fan blade (1), one end of the fan blade (1) is provided with a first groove (12), and the other end of the fan blade is provided with an air pipe (13); one end of the air pipe (13) is communicated with the cavity (11), and the other end of the air pipe is connected with an air pump; the bottom end of the first groove (12) is fixedly connected with a first air film (2), and the bottom end of the first groove (12) is provided with a first air passage (14); one end of the first air passage (14) is communicated with the cavity (11), and the other end of the first air passage is communicated with the first air film (2); one end of the fan blade (1) is provided with a first magnet (22); the number of the first magnets (22) is two, and the first magnets (22) are positioned on two sides of the first groove (12); an iron sheet (21) is arranged on the surface of the first gas film (2); an air pump is arranged at the lower end of the tower; the upper end of the tower is provided with an electromagnetic induction device and a controller; the controller controls the wind driven generator to operate; the electromagnetic induction device can induce the position of 50 m of birds around the wind driven generator; when the first air film (2) is fully extended, the iron sheet (21) and the first magnet (22) are mutually attracted.

2. A weathering resistant wind turbine blade according to claim 1 characterised in that: the upper end of the first groove (12) is provided with a baffle (3); the number of the baffles (3) is two, the two baffles (3) are adjacently arranged, one ends, far away from each other, of the baffles (3) are connected with the fan blade (1) in a twisting mode through torsion springs (31), and three magnets (32) are arranged at one ends, close to each other, of the two baffles (3); the magnetic poles of the two third magnets (32) at the ends close to each other are opposite; when the first air film (2) is inflated and stretched, the first air film (2) rapidly pushes the two third magnets (32) to be away from each other, so that the baffle (3) is opened, and in the process that the first air film (2) extends out of the first groove (12), the iron sheet (21) on the first air film (2) is not in contact with the third magnets (32).

3. A weathering resistant wind turbine blade according to claim 2 characterised in that: two side walls of the first groove (12) are provided with a second groove (15); a pushing block (16) is connected in the second groove (15) in a sliding manner; a first spring (17) is arranged between the pushing block (16) and the bottom end of the second groove (15), the section of the pushing block (16) is in a right trapezoid shape, and the larger one of the two ends of the pushing block (16) is in contact with the bottom of the first groove (12); one end of the first spring (17) is fixedly connected with the bottom of the second groove (15), and the other end of the first spring is fixedly connected with the pushing block (16).

4. A weathering resistant wind turbine blade according to claim 3 characterised in that: the surface of the fan blade (1) is provided with a third groove (4); the section of the third groove (4) is U-shaped, and a second spring (41) is arranged in two opposite groove walls of the third groove (4); one end of the second spring (41) is fixedly connected to the wall of the third groove (4), and the other end of the second spring is fixedly connected with a sliding block (42); the sliding block (42) is connected in the groove walls at two sides of the third groove (4) in a sliding manner, and the upper end of the sliding block (42) is rotatably connected with a U-shaped rod (43); a second air film (5) is sleeved on the U-shaped rod (43); a second air passage (44) is formed at the bottom of the third groove (4); one end of the second air passage (44) is communicated with the cavity (11), and the other end of the second air passage penetrates through the groove bottom of the third groove (4) to be communicated with the second air film (5).

5. A weathering resistant wind turbine blade according to claim 4 characterised in that: the lower end of the second air film (5) is provided with a V-shaped hole (51); when the second gas film (5) is stretched, the two side walls of the V-shaped hole (51) are separated from each other, so that the V-shaped hole (51) is opened, and gas is sprayed out from the V-shaped hole (51).

6. A weathering resistant wind turbine blade according to claim 5 characterised in that: one thicker end of the two sides of the fan blade (1) is provided with a sound wave emitter (6); when the electromagnetic induction device induces birds appearing in the range of 50 meters around, the electromagnetic inductor transmits an electric signal to the controller, and the controller controls the sound wave emitter (6) to emit sound waves towards the area where the birds are located.

Technical Field

The invention belongs to the technical field of wind driven generators, and particularly relates to an anti-aging wind driven generator blade.

Background

The wind power generator is an electric device which converts wind energy into mechanical work, the mechanical work drives a rotor to rotate, and finally outputs alternating current, and mainly the wind blades rotate under the action of wind force to drive the generator to rotate and generate electricity, so that kinetic energy of wind is converted into electric energy.

Some technical solutions related to an anti-aging wind turbine blade also appear in the prior art, for example, a chinese patent with application number cn201711373483.x discloses an anti-aging wind turbine blade, which includes a blade, and a cleaning device includes: the media ejection device comprises a driving assembly and a media ejection assembly connected with the driving assembly; the driving assembly is arranged in the blade body and can drive the medium spraying assembly to stretch and retract along a first direction, so that the medium spraying assembly is accommodated in the blade body and is positioned at a retreating position, and the medium spraying assembly extends out of the blade body to the external environment and is positioned at an extending position, and can spray a target medium to the outer surface of the blade body at the extending position; according to the technical scheme, through the arrangement of the cleaning device, substances attached to the outer surface of the blade are cleaned, so that the aim of maintaining the cleanliness of the outer surface of the blade is fulfilled; however, the technical scheme can not avoid that the linear velocity of the tail end of the blade is also very large because the blade of the wind driven generator is very large, and when birds touch the tail end of the blade, the birds can be instantly winched by the blade, so that the limitation of the technical scheme is caused.

In view of this, in order to overcome the above technical problems, the present invention provides an anti-aging wind turbine blade, which solves the above technical problems.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides an anti-aging wind driven generator blade, wherein a first air film, an iron sheet and a first magnet are matched with each other through the arrangement of the first air film, before an electromagnetic inductor senses that birds impact the end part of a fan blade, a controller can control an air pump to blow air, so that the first air film is inflated and extended, the iron sheet and the first magnet are mutually attracted, the first air film is wrapped on the end part of the fan blade, the birds touching the tail end of the fan blade are bounced off, and the birds touching the tail end of the fan blade are prevented from being instantly killed by winching.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to an anti-aging wind driven generator blade which is arranged on a tower; a cavity is formed in the fan blade, a first groove is formed in one end of the fan blade, and an air pipe is arranged at the other end of the fan blade; one end of the air pipe is communicated with the cavity, and the other end of the air pipe is connected with an air pump; the bottom end of the first groove is fixedly connected with a first air film, and a first air channel is arranged at the bottom end of the first groove; one end of the first air passage is communicated with the cavity, and the other end of the first air passage is communicated with the first air film; one end of the fan blade is provided with a first magnet; the number of the first magnets is two, and the first magnets are positioned on two sides of the first groove; an iron sheet is arranged on the surface of the first gas film; an air pump is arranged at the lower end of the tower; the upper end of the tower is provided with an electromagnetic induction device and a controller; the controller controls the wind driven generator to operate; the electromagnetic induction device can induce the position of 50 m of birds around the wind driven generator; when the first air film is completely stretched, the iron sheet and the first magnet are mutually attracted;

in the rotation process of the wind driven generator, the linear velocity of the tail end of the fan blade is very large because of the huge fan blade, and when birds touch the tail end of the fan blade, the birds can be instantly winched and killed by the fan blade;

when the wind driven generator works, the fan blades are arranged on a tower frame of the wind driven generator, an air pump is arranged on the tower frame, and the air pipe is positioned inside the tower frame; the working personnel controls the wind driven generator to operate through the controller, the electromagnetic sensor emits electromagnetic waves to sense the position of birds within 50 meters around, when the distance between the birds and one end of the fan blade is less than 10 meters, the electromagnetic sensor emits the electromagnetic waves to the controller, the controller controls the air pump to convey air into the cavity, at the moment, the air is conveyed to the air film through the air passage, the air film is inflated and extends out of the groove, the extended air film extends to the two sides of the groove, the controller controls the iron sheet and the magnet to operate at the moment, when the iron sheet extends out of the groove, the iron sheet moves to the magnet under the attraction of the magnetic force of the magnet until the air film is completely extended, the iron sheet and the magnet attract each other, at the moment, the controller controls the air pump to stop, the end part of the fan blade is wrapped by the air film, and the birds touching the tail end of the fan blade are bounced off, when the electromagnetic inductor senses that no birds are around, the electromagnetic inductor transmits electromagnetic waves to the controller, the controller controls the air pump to pump air in the cavity, the controller controls the iron sheet and the first magnet to be powered off, and air in the first air film is pumped out to enable the first air film to shrink into the first groove;

according to the invention, the first air film, the iron sheet and the first magnet are matched with each other through the arrangement of the first air film, before the electromagnetic inductor senses that the birds strike the end part of the fan blade, the controller can control the air pump to blow air, so that the first air film is inflated and extended, and the iron sheet and the first magnet are attracted with each other, so that the first air film wraps the end part of the fan blade, the birds touching the tail end of the fan blade are bounced off, and the birds touching the tail end of the fan blade are prevented from being instantly killed by winching.

Preferably, the upper end of the first groove is provided with a baffle; the number of the baffles is two, the two baffles are adjacently arranged, one ends, far away from each other, of the baffles are connected with the fan blades in a twisting mode through torsion springs, and three magnets are arranged at one ends, close to each other, of the two baffles; the magnetic poles of the two third magnets at the ends close to each other are opposite; when the first air film is inflated and extended, the first air film quickly pushes the two third magnets to be away from each other, so that the baffle is opened, and the iron sheet on the first air film is not contacted with the third magnets in the process that the first air film extends out of the first groove; the during operation, when the air film extends, No. one air film promotes two No. three magnets and keeps away from each other, make two baffles overcome the torsion of torsional spring and keep away from each other, the baffle is opened this moment, the air film stretches out a recess and to the in-process that both sides extend, the iron sheet is close to each other with magnet, make an air film pressure move two baffles and overcome torsional spring torsion and be close to fan blade tip, extend completely until an air film, the iron sheet attracts with a magnet each other, when an air film shrink, the torsional spring resumes, make the baffle promote a air film of shrink and get into a recess, when a recess gets into completely, two No. three magnet inter attraction, make two baffles totally sealed to the notch of a recess.

Preferably, two side walls of the first groove are provided with a second groove; a pushing block is connected in the second groove in a sliding manner; a first spring is arranged between the pushing block and the bottom end of the second groove, the cross section of the pushing block is in a right trapezoid shape, and the larger end of the two ends of the pushing block is in contact with the bottom of the first groove; one end of the first spring is fixedly connected with the bottom of the second groove, and the other end of the first spring is fixedly connected with the pushing block; when the air pump works, the air pump blows air to inflate and extend the first air film, the two pushing blocks are pushed to extrude the first spring, the pushing blocks move into the second groove, the space inside the first groove is enlarged, the extending speed of the first air film is increased, and when the first air film continuously extends out of the first groove, the first spring restores to push the pushing blocks to approach each other; the air film wrapping device is provided with the pushing block, so that when the first air film extends, the pushing block is extruded, the space of the first groove is enlarged, the contact surface between the extended first air film and the baffle is enlarged, the pushing force of the first air film on the baffle is increased, the first air film is accelerated to extend out of the first groove, and the first spring and the pushing block are matched with each other, so that the extension of the first air film is accelerated, and the wrapping speed of the first air film on the end part of the fan blade is increased.

Preferably, the surface of the fan blade is provided with a third groove; the section of the third groove is U-shaped, the third groove faces to the narrower side of the two sides of the fan blade, and two opposite groove walls of the third groove are internally provided with a second spring; one end of the second spring is fixedly connected to the groove wall of the third groove, and the other end of the second spring is fixedly connected with a sliding block; the sliding block is connected in the groove walls on the two sides of the third groove in a sliding manner, and the upper end of the sliding block is rotatably connected with a U-shaped rod; a second air film is sleeved on the U-shaped rod; a second air passage is formed at the bottom of the third groove; one end of the second air passage is communicated with the cavity, and the other end of the second air passage penetrates through the groove bottom of the third groove and is communicated with the second air film; when the fan blade air pump works, the controller controls the air pump to blow air into the cavity, so that air flows into the second air film through the second air passage, the second air film extends out of the third groove, the second air film can push the U-shaped rod to rotate upwards in the process of extending the second air film, the second spring pulls the sliding block to continuously keep away from the second air passage, the sliding block drives the U-shaped rod to pull the second air film to slide together while sliding, the extension of the second air film is accelerated, after the second spring is recovered, the air pump can continuously convey air into the second air film, the second air film pushes the U-shaped rod to rotate, the U-shaped rod pulls the sliding block, so that the sliding block presses the second air film and moves towards the narrower side of the two sides of the fan blade, until the second air film is completely extended, the two side walls of the U-shaped rod are clamped into the three grooves, and the two side walls of the second air film cover the narrower side of the two sides of the fan blade, the device further prevents the narrow side of the fan blade from strangling birds, when the work is finished, the controller controls the air pump to pump air, so that the second air film loses air contraction, the second spring recovers and pushes the sliding block to approach the second air passage until the second spring completely recovers, the second air film continuously contracts into the second air passage under the action of suction force of the air pump, the U-shaped rod is pulled to rotate, the sliding block can be pulled to move towards the second air passage by the U-shaped rod, the sliding block pulls the spring to extend until the second air film completely enters the second air passage, and the U-shaped rod is completely clamped into the third groove; and when the sliding block moves to the maximum, a gap for the U-shaped rod to rotate is still left between the sliding block and the groove wall of the third groove.

Preferably, the lower end of the second air film is provided with a V-shaped hole; when the second gas film extends, two side walls of the V-shaped hole are far away from each other, so that the V-shaped hole is opened, and gas is sprayed out of the V-shaped hole; when the fan blade is in work, along with the continuous extension of the second air film, two side walls of the V-shaped hole at the lower end are far away from each other, so that the V-shaped hole is opened, the air input into the second air film is ejected out from the V-shaped hole, the air ejected from the V-shaped hole can blow away dust on the surface of the fan blade in the process that the second air film moves towards the narrower end of the fan blade, an airflow layer is formed between the second air film and the fan blade through airflow ejection, the friction between the second air film and the fan blade is reduced, and when the fan blade is finished, the second air film shrinks, so that two ends of the V-shaped hole are close to each other, and the V-shaped hole is closed; according to the invention, through the arrangement of the V-shaped holes, on one hand, the air sprayed out through the V-shaped holes can clean the surfaces of the fan blades along with the movement of the second air film, and the generation of the airflow layer can reduce the friction between the second air film and the fan blades, so that the movement of the second air film on the surfaces of the fan blades is accelerated, the abrasion to the second air film is reduced, and the service life of the second air film is prolonged; on the other hand, when the birds impact on the second air film, the extruded gas can be discharged from the V-shaped holes, so that the birds impacting on the second air film are buffered.

Preferably, the thicker end of the two sides of the fan blade is provided with a sound wave emitter; when the electromagnetic induction device induces birds appearing in the range of 50 meters around, the electromagnetic inductor transmits electromagnetic waves to the controller, and the controller controls the sound wave emitter to emit sound waves towards the area where the birds are located; when the bird dispelling device works, the controller controls the electromagnetic induction device to start, the electromagnetic induction device detects whether birds appear in the range of 50 meters around through electromagnetic waves, when the electromagnetic induction device induces the birds appearing in the range of 50 meters around, the electromagnetic inductor transmits electromagnetic waves to the controller, and the controller controls the sound wave emitter to emit sound waves towards the area where the birds are located, so that the birds are dispelled, and the situation that the birds are close to the wind driven generator is avoided.

The invention has the following beneficial effects:

1. according to the invention, the first air film, the iron sheet and the first magnet are matched with each other through the arrangement of the first air film, before the electromagnetic inductor senses that the birds strike the end part of the fan blade, the controller can control the air pump to blow air, so that the first air film is inflated and extended, and the iron sheet and the first magnet are attracted with each other, so that the first air film wraps the end part of the fan blade, the birds touching the tail end of the fan blade are bounced off, and the birds touching the tail end of the fan blade are prevented from being instantly killed by winching.

2. The air film wrapping device is provided with the pushing block, so that when the first air film extends, the pushing block is extruded, the space of the first groove is enlarged, the contact surface between the extended first air film and the baffle is enlarged, the pushing force of the first air film on the baffle is increased, the first air film is accelerated to extend out of the first groove, and the first spring and the pushing block are matched with each other, so that the extension of the first air film is accelerated, and the wrapping speed of the first air film on the end part of the fan blade is increased.

3. According to the invention, through the arrangement of the V-shaped holes, on one hand, the air sprayed out through the V-shaped holes can clean the surfaces of the fan blades along with the movement of the second air film, and the generation of the airflow layer can reduce the friction between the second air film and the fan blades, so that the movement of the second air film on the surfaces of the fan blades is accelerated, the abrasion to the second air film is reduced, and the service life of the second air film is prolonged; on the other hand, when the birds impact on the second air film, the extruded gas can be discharged from the V-shaped holes, so that the birds impacting on the second air film are buffered.

Drawings

The invention is further described with reference to the following figures and embodiments.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic diagram of the structure of the second gas film of the present invention;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is a schematic view of the construction of the baffle of the present invention;

in the figure: 1. a fan blade; 11. a cavity; 12. a first groove; 13. an air tube; 14. an air passage I; 15. a second groove; 16. a pushing block; 17. a first spring; 2. a first gas film; 21. iron sheets; 22. a first magnet; 3. a baffle plate; 31. a torsion spring; 32. a magnet No. three; 4. a groove III; 41. a second spring; 42. a slider; 43. a U-shaped rod; 44. a second air passage; 5. a second gas film; 51. a V-shaped hole; 6. an acoustic wave emitter.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

1-5, a weatherproof aerogenerator blade according to the present invention is mounted on a tower; a cavity 11 is arranged in the fan blade 1, one end of the fan blade 1 is provided with a first groove 12, and the other end of the fan blade is provided with an air pipe 13; one end of the air pipe 13 is communicated with the cavity 11, and the other end of the air pipe is connected with an air pump; the bottom end of the first groove 12 is fixedly connected with a first air film 2, and the bottom end of the first groove 12 is provided with a first air passage 14; one end of the first air channel 14 is communicated with the cavity 11, and the other end of the first air channel is communicated with the first air film 2; one end of the fan blade 1 is provided with a first magnet 22; the number of the first magnets 22 is two, and the first magnets 22 are positioned on two sides of the first groove 12; an iron sheet 21 is arranged on the surface of the first gas film 2; an air pump is arranged at the lower end of the tower; the upper end of the tower is provided with an electromagnetic induction device and a controller; the controller controls the wind driven generator to operate; the electromagnetic induction device can induce the position of 50 m of birds around the wind driven generator; when the first air film 2 is completely stretched, the iron sheet 21 and the first magnet 22 are mutually attracted;

in the rotation process of the wind driven generator, the linear velocity of the tail end of the fan blade 1 is very large because the fan blade 1 is very large, and when birds touch the tail end of the fan blade 1, the birds can be instantly winched and killed by the fan blade 1;

when the wind driven generator works, the fan blade 1 is arranged on a tower of the wind driven generator, an air pump is arranged on the tower, and the air pipe 13 is positioned inside the tower; the working personnel controls the wind driven generator to operate through the controller, the electromagnetic sensor emits electromagnetic waves to sense the position of birds within 50 meters around, when the distance between the birds and one end of the fan blade 1 is less than 10 meters, the electromagnetic sensor emits the electromagnetic waves to the controller, the controller controls the air pump to convey air into the cavity 11, at the moment, the air is conveyed to the first air film 2 through the first air passage 14, the first air film 2 is inflated and extends out of the first groove 12, the extended first air film 2 extends towards two sides of the first groove 12, at the moment, the controller controls the iron sheet 21 and the first magnet 22 to operate, when the iron sheet 21 extends out of the first groove 12, the iron sheet moves towards the first magnet 22 under the attraction of the magnetic force of the first magnet 22 until the first air film 2 completely extends, the iron sheet 21 and the first magnet 22 mutually attract, at the moment, the controller controls the air pump to stop, the first air film 2 wraps the end part of the fan blade 1, when the electromagnetic inductor senses that no birds are around, the electromagnetic inductor transmits electromagnetic waves to the controller, the controller controls the air pump to pump air in the cavity 11 at the moment, the controller controls the iron sheet 21 and the first magnet 22 to be powered off, the air in the first air film 2 is pumped out, and the first air film 2 is retracted into the first groove 12;

according to the invention, the first air film 2, the iron sheet 21 and the first magnet 22 are matched with each other through the arrangement of the first air film 2, before the electromagnetic inductor senses that the birds impact the end part of the fan blade 1, the controller can control the air pump to blow air, so that the first air film 2 is inflated and extended, the iron sheet 21 and the first magnet 22 are attracted with each other, and thus the first air film 2 wraps the end part of the fan blade 1, the birds touching the tail end of the fan blade 1 are flicked, and the birds touching the tail end of the fan blade 1 are prevented from being instantly killed by winching.

As an embodiment of the invention, the upper end of the first groove 12 is provided with a baffle 3; the number of the baffle plates 3 is two, the two baffle plates 3 are adjacently arranged, one ends, far away from each other, of the baffle plates 3 are in twisted connection with the fan blade 1 through torsion springs 31, and the ends, close to each other, of the two baffle plates 3 are provided with third magnets 32; the magnetic poles of the ends, close to each other, of the two third magnets 32 are opposite; when the first air film 2 is inflated and extended, the first air film 2 quickly pushes the two third magnets 32 to be away from each other, so that the baffle 3 is opened, and the iron sheet 21 on the first air film 2 is not contacted with the third magnets 32 in the process that the first air film 2 extends out of the first groove 12; during operation, when air film 2 extends, air film 2 promotes two No. three magnets 32 and keeps away from each other, make two baffle 3 overcome torsional spring 31's torsion and keep away from each other, baffle 3 opens this moment, air film 2 stretches out recess 12 and to the in-process that both sides extend, iron sheet 21 and magnet 22 are close to each other, make air film 2 press two baffle 3 and overcome torsional spring 31 torsion and be close to fan blade 1 tip, until air film 2 extends completely, iron sheet 21 and magnet 22 attract each other, when air film 2 contracts, torsional spring 31 resumes, make baffle 3 promote a No. air film 2 of shrink and get into recess 12, when recess 12 entered completely, two No. three magnets 32 attract each other, make two baffles 3 totally sealed to the notch of recess 12.

As an embodiment of the present invention, a second groove 15 is disposed on two side walls of the first groove 12; a pushing block 16 is connected in the second groove 15 in a sliding manner; a first spring 17 is arranged between the pushing block 16 and the bottom end of the second groove 15, the cross section of the pushing block 16 is in a right trapezoid shape, and the larger one of the two ends of the pushing block 16 is in contact with the bottom of the first groove 12; one end of the first spring 17 is fixedly connected with the bottom of the second groove 15, and the other end of the first spring is fixedly connected with the pushing block 16; during operation, the air pump blows air to enable the first air film 2 to inflate and extend, the two pushing blocks 16 are pushed to extrude the first spring 17, the pushing blocks 16 move into the second groove 15, the space inside the first groove 12 is enlarged, the extending speed of the first air film 2 is increased, when the first air film 2 continuously extends out of the first groove 12, the first spring 17 restores to push the pushing blocks 16 to approach each other, and the pushing blocks 16 are in a right trapezoid shape, so that in the process that the pushing blocks 16 approach each other, the pushing blocks 16 can generate vertical inclined planes and upward oblique pushing force on the first air film 2, and further the first air film 2 can be pushed to accelerate to extend out of the first groove 12; according to the invention, the pushing block 16 is arranged, so that when the first air film 2 extends, the pushing block 16 is extruded, the space of the first groove 12 is increased, the contact surface between the extended first air film 2 and the baffle 3 is increased, the thrust of the first air film 2 to the baffle 3 is increased, the first air film 2 is accelerated to extend out of the first groove 12, and the first spring 17 and the pushing block 16 are matched with each other, so that the extension of the first air film 2 is accelerated, and the wrapping speed of the first air film 2 to the end part of the fan blade 1 is increased.

As an embodiment of the invention, a third groove 4 is formed on the surface of the fan blade 1; the section of the third groove 4 is U-shaped, the third groove 4 faces the narrower side of the two sides of the fan blade 1, and two opposite groove walls of the third groove 4 are internally provided with a second spring 41; one end of the second spring 41 is fixedly connected to the groove wall of the third groove 4, and the other end of the second spring is fixedly connected with a sliding block 42; the sliding block 42 is connected in the groove walls at two sides of the third groove 4 in a sliding manner, and the upper end of the sliding block 42 is rotatably connected with a U-shaped rod 43; a second air film 5 is sleeved on the U-shaped rod 43; a second air passage 44 is formed at the bottom of the third groove 4; one end of the second air passage 44 is communicated with the cavity 11, and the other end of the second air passage passes through the bottom of the third groove 4 and is communicated with the second air film 5; when the air pump works, the controller controls the air pump to blow air into the cavity 11, so that air flows into the second air film 5 through the second air passage 44, the second air film 5 extends out of the third groove 4, the second air film 5 can push the U-shaped rod 43 to rotate upwards in the process of extending the second air film 5, the second spring 41 pulls the sliding block 42 to be away from the second air passage 44 continuously, the sliding block 42 drives the U-shaped rod 43 to pull the second air film 5 to slide together while sliding, the extension of the second air film 5 is accelerated, after the second spring 41 is restored, the air pump can continue to convey air into the second air film 5, so that the second air film 5 pushes the U-shaped rod 43 to rotate, the U-shaped rod 43 pulls the sliding block 42, the sliding block 42 presses the second spring 41 and moves towards the narrower one of the two sides of the fan blades 1, and the U-shaped rods 43 are clamped into the two side walls of the third groove 4 until the second air film 5 extends completely, the second air film 5 covers the narrower side of the two sides of the fan blade 1, so that the narrow side of the fan blade 1 is prevented from killing birds by winching, when the work is finished, the controller controls the air pump to pump air, the second air film 5 loses air contraction, the second spring 41 recovers and pushes the sliding block 42 to approach the second air passage 44 till the second spring 41 completely recovers, the second air film 5 continuously contracts into the second air passage 44 under the suction effect of the air pump, the U-shaped rod 43 is pulled to rotate, the U-shaped rod 43 can pull the sliding block 42 to move towards the second air passage 44, the sliding block 42 pulls the spring to extend till the second air film 5 completely enters the second air passage 44, and the U-shaped rod 43 is completely clamped into the third groove 4; and when the sliding block 42 moves to the maximum, a gap for the U-shaped rod 43 to rotate is still left between the sliding block 42 and the groove wall of the third groove 4.

As an embodiment of the present invention, the lower end of the second gas film 5 is provided with a V-shaped hole 51; when the second gas film 5 extends, two side walls of the V-shaped hole 51 are far away from each other, so that the V-shaped hole 51 is opened, and gas is sprayed out from the V-shaped hole 51; when the fan blade 1 works, with the continuous extension of the second air film 5, two side walls of the V-shaped hole 51 at the lower end are far away from each other, so that the V-shaped hole 51 is opened, the air input into the second air film 5 is ejected from the V-shaped hole 51, the air ejected through the V-shaped hole 51 can blow away dust on the surface of the fan blade 1 in the process that the second air film 5 moves towards the narrower end of the fan blade 1, an air flow layer is formed between the second air film 5 and the fan blade 1 through air flow ejection, the friction between the second air film 5 and the fan blade 1 is reduced, and when the fan blade 1 finishes working, the second air film 5 contracts to enable two ends of the V-shaped hole 51 to be close, so that the V-shaped hole 51 is closed; according to the invention, through the arrangement of the V-shaped holes 51, on one hand, the air sprayed out through the V-shaped holes 51 can clean the surface of the fan blade 1 along with the movement of the second air film 5, and the friction between the second air film 5 and the fan blade 1 is reduced due to the generation of the airflow layer, so that the movement of the second air film 5 on the surface of the fan blade 1 is accelerated, the abrasion to the second air film 5 is reduced, and the service life of the second air film 5 is prolonged; on the other hand, when the birds impact on the second air film 5, the extruded gas can be discharged from the V-shaped holes 51, so that the birds impacting on the second air film 5 are buffered.

As an embodiment of the invention, one thicker end of the two sides of the fan blade 1 is provided with a sound wave emitter 6; when the electromagnetic induction device induces birds appearing in the range of 50 meters around, the electromagnetic inductor transmits electromagnetic waves to the controller, and the controller controls the sound wave emitter 6 to emit sound waves towards the area where the birds are located; when the bird dispelling device works, the controller controls the electromagnetic induction device to start, the electromagnetic induction device detects whether birds appear in the range of 50 meters around through electromagnetic waves, when the electromagnetic induction device induces the birds appearing in the range of 50 meters around, the electromagnetic inductor transmits electromagnetic waves to the controller, and the controller controls the sound wave emitter 6 to emit sound waves towards the area where the birds are located, so that the birds are dispelled, and the situation that the birds are close to the wind driven generator is avoided.

When the wind driven generator works, the fan blade 1 is arranged on a tower of the wind driven generator, an air pump is arranged on the tower, and the air pipe 13 is positioned inside the tower; the working personnel controls the wind driven generator to operate through the controller, the electromagnetic sensor emits electromagnetic waves to sense the position of birds within 50 meters around, when the distance between the birds and one end of the fan blade 1 is less than 10 meters, the electromagnetic sensor emits the electromagnetic waves to the controller, the controller controls the air pump to convey air into the cavity 11, at the moment, the air is conveyed to the first air film 2 through the first air passage 14, the first air film 2 is inflated and extends out of the first groove 12, the extended first air film 2 extends towards two sides of the first groove 12, at the moment, the controller controls the iron sheet 21 and the first magnet 22 to operate, when the iron sheet 21 extends out of the first groove 12, the iron sheet moves towards the first magnet 22 under the attraction of the magnetic force of the first magnet 22 until the first air film 2 completely extends, the iron sheet 21 and the first magnet 22 mutually attract, at the moment, the controller controls the air pump to stop, the first air film 2 wraps the end part of the fan blade 1, when the electromagnetic inductor senses that no birds are around, the electromagnetic inductor transmits electromagnetic waves to the controller, the controller controls the air pump to pump air in the cavity 11 at the moment, the controller controls the iron sheet 21 and the first magnet 22 to be powered off, the air in the first air film 2 is pumped out, and the first air film 2 is retracted into the first groove 12; when the first air film 2 extends, the first air film 2 pushes the two third magnets 32 to be away from each other, so that the two baffles 3 overcome the torsion of the torsion spring 31 to be away from each other, at the moment, the baffles 3 are opened, the first air film 2 extends out of the first groove 12 and extends towards two sides, the iron sheet 21 and the first magnet 22 are close to each other, the first air film 2 presses the two baffles 3 to overcome the torsion of the torsion spring 31 to be close to the end part of the fan blade 1 until the first air film 2 extends completely, the iron sheet 21 and the first magnet 22 attract each other, when the first air film 2 contracts, the torsion spring 31 is restored, so that the baffles 3 push the contracted first air film 2 to enter the first groove 12, and when the first groove 12 completely enters, the two third magnets 32 attract each other, so that the two baffles 3 completely seal the notch of the first groove 12; the air pump blows air to enable the first air film 2 to be inflated and stretched, the two pushing blocks 16 are pushed to extrude the first spring 17, the pushing blocks 16 are enabled to move into the second groove 15, the space inside the first groove 12 is enabled to be enlarged, the stretching speed of the first air film 2 is enabled to be increased, when the first air film 2 continuously stretches out of the first groove 12, the first spring 17 restores to push the pushing blocks 16 to be close to each other, and the pushing blocks 16 are right-angled trapezoids, so that in the process that the pushing blocks 16 are close to each other, the pushing blocks 16 can generate vertical inclined planes and upward oblique pushing force on the first air film 2, and further the first air film 2 can be pushed to stretch out of the first groove 12 in an accelerating mode; the controller controls the air pump to blow air into the cavity 11, so that air flows into the second air film 5 through the second air passage 44, the second air film 5 extends out of the third groove 4, the second air film 5 can push the U-shaped rod 43 to rotate upwards in the process of extending the second air film 5, the second spring 41 pulls the sliding block 42 to be away from the second air passage 44 continuously, the sliding block 42 drives the U-shaped rod 43 to pull the second air film 5 to slide together while sliding, the extension of the second air film 5 is accelerated, after the second spring 41 is restored, the air pump can continue to convey air into the second air film 5, so that the second air film 5 pushes the U-shaped rod 43 to rotate, the U-shaped rod 43 pulls the sliding block 42, the sliding block 42 presses the second spring 41 and moves towards the narrower side of the two sides of the fan blade 1, and the two side walls of the U-shaped rod 43 are clamped into the two side walls of the third groove 4 until the second air film 5 is fully extended, the second air film 5 covers the narrower side of the two sides of the fan blade 1, so that the narrow side of the fan blade 1 is prevented from killing birds by winching, when the work is finished, the controller controls the air pump to pump air, the second air film 5 loses air contraction, the second spring 41 recovers and pushes the sliding block 42 to approach the second air passage 44 till the second spring 41 completely recovers, the second air film 5 continuously contracts into the second air passage 44 under the suction effect of the air pump, the U-shaped rod 43 is pulled to rotate, the U-shaped rod 43 can pull the sliding block 42 to move towards the second air passage 44, the sliding block 42 pulls the spring to extend till the second air film 5 completely enters the second air passage 44, and the U-shaped rod 43 is completely clamped into the third groove 4; when the sliding block 42 moves to the maximum, a gap for the U-shaped rod 43 to rotate is still left between the sliding block 42 and the groove wall of the third groove 4; with the continuous extension of the second air film 5, two side walls of the lower V-shaped hole 51 are far away from each other, so that the V-shaped hole 51 is opened, the air input into the second air film 5 is ejected out from the V-shaped hole 51, the air ejected through the V-shaped hole 51 can blow away dust on the surface of the fan blade 1 in the process that the second air film 5 moves towards the narrower end of the fan blade 1, an airflow layer is formed between the second air film 5 and the fan blade 1 by airflow ejection, the friction between the second air film 5 and the fan blade 1 is reduced, and when the work is finished, the second air film 5 contracts to enable two ends of the V-shaped hole 51 to be close, so that the V-shaped hole 51 is closed; the controller controls the electromagnetic induction device to start, the electromagnetic induction device detects whether birds appear in the range of 50 meters around through electromagnetic waves, when the electromagnetic induction device induces that the birds appear in the range of 50 meters around, the electromagnetic inductor transmits electromagnetic waves to the controller, and the controller controls the sound wave emitter 6 to emit sound waves towards the area where the birds are located, so that the birds are driven, and the birds are prevented from being close to the wind driven generator.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.