Self-damping wind turbine blade with tuned mass damper

Abstract

The invention relates to the technical field of wind turbine blades, in particular to a self-damping wind turbine blade with a tuned mass damper, which comprises a blade main body, a plurality of webs are fixedly connected to the inner wall of the blade main body, damping assemblies are arranged on the inner sides of the two webs in the middle, and supporting assemblies are arranged on the outer walls of the damping assemblies. The damping assembly comprises two sliding groove plates, guide grooves are formed in the front sides and the rear sides of the inner sides of the two sliding groove plates correspondingly, gear connecting blocks are fixedly connected to the four edges of the outer sides of the two sliding groove plates correspondingly, and a cross plate is fixedly connected to the middles of the inner sides of the two sliding groove plates. By arranging the blade body, the web, the damping assembly and the supporting assembly, effective control over the vibration amplitude of the wind turbine blade is achieved, firstly, energy in the initial vibration stage of the blade is effectively absorbed through preliminary buffering of a damping plate and a spring, and then when vibration is intensified, the vibration amplitude of the blade is effectively reduced. And the impact force is further dispersed through a secondary buffering mechanism of the retracting and expanding plate and the second spring.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blades. More specifically, the present invention relates to a self-damping wind turbine blade with a mass-tuning damper. Background Art

[0002] A wind turbine, also known as a wind generator, is a device that converts wind energy into mechanical energy and then into electrical energy. The main function of the wind turbine blade is to capture wind energy and convert it into mechanical energy, driving the rotation of the shaft of the wind generator, and then driving the generator to generate electricity. Through its special shape and structure, the blade effectively utilizes wind energy and improves the efficiency and performance of wind power generation.

[0003] According to the patent document: CN105804944A, a dual-generation intelligent adaptive damping wind turbine disclosed includes: an adaptive damping wind blade, a hub, a function unit, a tower, and a central controller; the adaptive damping wind blade includes: a blade damping piezoelectric web, a blade damping piezoelectric rib, a hyperbolic damping piezoelectric generator, a blade porous regulator, a blade vibration sensor, a skin, a blade root, and a blade tip; the blade damping piezoelectric web is assembled inside the blade near the middle or / and other positions of the blade, and the hyperbolic damping piezoelectric generator is installed inside the blade; the blade damping piezoelectric rib is assembled inside the blade near the blade tip and the blade root positions. The wind turbine of the present invention includes: a wind piezoelectric power generation working module and a wind generator power generation working module, which can not only intelligently reduce excessive vibration of the blade to maintain the safe operation of the blade, but also absorb excessive energy generated by blade vibration to generate piezoelectric power, thereby enhancing the power generation of the wind turbine.

[0004] The characteristics of natural wind are variable and unpredictable. It contains unstable and random elements. The wind speed and direction often change irregularly. When this kind of wind with turbulent characteristics acts on the blades of a wind generator, a series of unstable aerodynamic forces will be generated. These aerodynamic forces will continuously act on the blades, causing the blades to vibrate. If the blades are in this vibration state for a long time, their materials will continuously bear alternating stresses. The continuous action of this alternating stress will ultimately lead to fatigue damage of the blade materials, thereby reducing the service life of the blades. In the worst case, this long-term vibration and stress action may cause serious safety accidents such as cracking and breaking of the blades, posing a threat to the safe operation of wind power generation facilities. Summary of the Invention

[0005] To overcome the above-mentioned defects of the prior art, the present invention provides a self-damping wind turbine blade with a mass-tuned damper. The technical problem to be solved by the present invention is that when the wind with turbulent characteristics acts on the blades of a wind turbine, a series of unstable aerodynamic forces will be generated. These aerodynamic forces will continuously act on the blades, causing the blades to vibrate. If the blades are in this vibrating state for a long time, their materials will continuously bear alternating stresses. The continuous action of this alternating stress will ultimately lead to fatigue damage of the blade materials, thereby reducing the service life of the blades. In the worst case, this long-term vibration and stress action may cause serious safety accidents such as cracking and breaking of the blades, posing a threat to the safe operation of wind power generation facilities.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A self-damping wind turbine blade with a mass-tuned damper, including a blade body. A plurality of webs are fixedly connected to the inner wall of the blade body. A damping assembly is arranged inside the middle two webs, and a support assembly is arranged on the outer wall of the damping assembly;

[0008] The damping assembly includes two chute plates. Guide grooves are opened on the front, rear, left, and right sides inside the two chute plates. Gear connection blocks are fixedly connected to the outer sides of the four sides of the two chute plates. A cross plate is fixedly connected to the middle of the inner sides of the two chute plates;

[0009] The support assembly includes two vertical plates. The inner sides of the two vertical plates are fixedly connected to the middle of the front and rear sides of the two chute plates. Guide cross bars are fixedly connected to the middle of the outer sides of the two vertical plates. Second springs are fixedly connected to the top and bottom of the outer sides of the two vertical plates. Guide cross bar chutes are opened on the outer sides of the four sides of the two guide cross bars.

[0010] As a further solution of the present invention: Expansion and contraction plates are slidably connected to the left and right sides inside the two chute plates. Expansion and contraction plate sliders are fixedly connected to the front, rear, left, and right sides of the top and bottom of the two expansion and contraction plates. The outer walls of the left and right groups of expansion and contraction plate sliders are slidably connected to the left and right sides of the inner walls of the two guide grooves opened inside the two chute plates.

[0011] As a further solution of the present invention: Rectangular connecting pipes are fixedly connected to the outer sides of the two expansion and contraction plates. Damping plate connecting plates are fixedly connected to the outer sides of the two rectangular connecting pipes. Rotating rods are rotatably connected to the sides of the two rectangular connecting pipes close to the expansion and contraction plates at the front and rear. Hinge grooves are opened on the top, bottom, front, and rear sides of the two damping plate connecting plates.

[0012] As a further solution of the present invention: on the inner sides of the left and right groups of the hinge grooves, there are rotatably connected double hinge blocks. On the left and right sides of the left and right groups of the double hinge blocks, there are rotatably connected double hinge rods. On the sides of the inner two groups of the double hinge rods close to the rectangular connection pipe, there are rotatably connected spring connection blocks. On one side of the left and right groups of the spring connection blocks, there are fixedly connected springs. The ends of the left and right groups of the springs away from the spring connection blocks are fixedly connected to the outer walls of the inner sides of the two shock-absorbing plate connection plates.

[0013] As a further solution of the present invention: on the sides of the outer two groups of the double hinge rods away from the shock-absorbing plate connection plates, there are rotatably connected shock-absorbing plate connection blocks. On the sides of the left and right groups of the shock-absorbing plate connection blocks away from the double hinge rods, there are fixedly connected shock-absorbing plates. The left and right groups of the shock-absorbing plate connection blocks are fixedly connected to the four sides of the two shock-absorbing plates. The outer sides of the two shock-absorbing plates are in contact with the inner sides of the two middle webs.

[0014] As a further solution of the present invention: on the sides of the inner walls of the two guiding crossbars away from each other, there are slidably connected double hinge sliders. In the middle of the inner walls of the two double hinge sliders, there are fixedly connected expansion and contraction rods. The left and right sides of the two expansion and contraction rods extend to the outer walls of the two guiding crossbars. At the top and bottom of the two double hinge sliders, there are rotatably connected double hinge rotating rods. The sides of the two groups of the double hinge rotating rods away from the double hinge sliders extend to the tops and bottoms of the outer walls of the two guiding crossbars and are rotatably connected to sliders. The outer walls of the left and right groups of the sliders are respectively slidably connected to the inner walls of the two vertical plate guiding grooves opened on the two vertical plates. The outer sides of the left and right groups of the sliders are fixedly connected to the inner ends of the left and right groups of the second springs.

[0015] As a further solution of the present invention: at the tops and bottoms of the two sides of the outer walls of the two expansion and contraction rods extending to the two guiding crossbars, there are fixedly connected L-shaped expansion and contraction rods. On the outer walls of the two groups of the top and bottom L-shaped expansion and contraction rods, there are slidably connected rack rod chute plates. The inner sides of the two groups of the top and bottom rack rod chute plates are respectively fixedly connected to the middle parts of the outer sides of the two chute plates. On the sides of the left and right groups of the L-shaped expansion and contraction rods away from the rack rod chute plates, there are fixedly connected rack rods.

[0016] As a further solution of the present invention: the left and right sides of the two expansion and contraction rods are rotatably connected to the sides of the left and right groups of the rotating rods away from the rectangular connection pipe.

[0017] As a further solution of the present invention: on the outer sides of the left and right groups of the rack rods, there are rotatably connected gears. The inner walls of the left and right groups of the gears are rotatably connected to the outer walls of the four gear connection blocks fixed to the outer sides of the two chute plates. On the outer walls of the left and right groups of the gears, there are fixedly connected inclined rods.

[0018] As a further solution of the present invention: Gears are rotatably connected to the outer sides of the left and right sets of the rack bars. The inner walls of the left and right sets of gears are rotatably connected to the outer walls of the four gear connection blocks fixed to the outer sides of the two chute plates. Oblique rods are fixedly connected to the outer walls of the left and right sets of gears.

[0019] The beneficial effects of the present invention are as follows:

[0020] By providing a blade main body, a web, a shock absorption assembly and a support assembly, the present invention realizes effective control of the vibration amplitude of the wind turbine blade. First, through the preliminary buffering of the shock absorption plate and the spring, the energy in the initial stage of blade vibration is effectively absorbed. Subsequently, when the vibration intensifies, the secondary buffering mechanism of the expansion and contraction plate and the second spring further disperses the impact force and enhances the stability of the blade. Finally, through the linkage of the gear, the oblique rod and the support plate, not only is additional support provided for the blade, but also the displacement generated by vibration is further reduced, thereby comprehensively improving the power generation efficiency and operation stability of the wind turbine. In addition, the design of this shock absorption mechanism fully considers the balance between practicability and durability. Its structure is compact and ingenious, which not only improves the shock absorption effect, but also ensures the overall strength and durability of the wind turbine blade. At the same time, the installation and maintenance process of this mechanism is simple and fast, reducing the operation cost of the wind turbine and injecting new vitality into the development of the wind power generation industry. Based on the above analysis, the present invention not only demonstrates outstanding technical advantages, but also has extremely broad application prospects, bringing a revolutionary change to the wind power generation field and thus greatly promoting the development and progress of this industry. Description of the Drawings

[0021] Figure 1 It is a three-dimensional structure schematic diagram of the main body of the present invention;

[0022] Figure 2 It is a three-dimensional sectional structure schematic diagram of the main body of the present invention;

[0023] Figure 3 It is a three-dimensional structure schematic diagram of the shock absorption assembly and the support assembly of the present invention;

[0024] Figure 4 It is a three-dimensional separated structure schematic diagram of the shock absorption assembly and the support assembly of the present invention;

[0025] Figure 5 It is a three-dimensional structure schematic diagram of the shock absorption assembly of the present invention;

[0026] Figure 6 It is a three-dimensional separated structure schematic diagram of the shock absorption assembly of the present invention;

[0027] Figure 7 It is a three-dimensional structure schematic diagram of the support assembly of the present invention;

[0028] Figure 8Schematic diagram of the three-dimensional separation structure of the support component of the present invention;

[0029] Figure 9 Enlarged structural schematic diagram at position A of the present invention.

[0030] In the figure: 1. Blade main body; 2. Web; 3. Shock absorption component; 31. Slide groove plate; 32. Guide groove; 33. Gear connection block; 34. Cross plate; 35. Expansion and contraction plate; 36. Expansion and contraction plate slider; 37. Rotating rod; 38. Shock absorption plate connection plate; 39. Hinge groove; 310. Rectangular connection pipe; 311. Bidirectional hinge block; 312. Bidirectional hinge rod; 313. Shock absorption plate connection block; 314. Spring connection block; 315. Spring; 316. Shock absorption plate; 4. Support component; 41. Vertical plate; 42. Vertical plate guide groove; 43. Second spring; 44. Guide cross bar; 45. Guide cross bar slide groove; 46. Slide block; 47. Bidirectional hinge rotating rod; 48. Bidirectional hinge slider; 49. Expansion and contraction rod; 410. L-shaped expansion and contraction rod; 411. Rack bar; 412. Rack bar slide groove plate; 413. Gear; 414. Inclined rod; 415. L-shaped support plate connecting rod; 416. Support plate. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figures 1-3 shown, the present invention provides a self-damping wind turbine blade with a mass-tuned damper, including a blade main body 1. A plurality of webs 2 are fixedly connected to the inner wall of the blade main body 1. A shock absorption component 3 is arranged inside the middle two webs 2, and a support component 4 is arranged on the outer wall of the shock absorption component 3.

[0033] As Figures 3-9As shown in the figure, it includes a blade body 1. A plurality of webs 2 are fixedly connected to the inner wall of the blade body 1. A shock absorption component 3 is arranged inside the middle two webs 2. A support component 4 is arranged on the outer wall of the shock absorption component 3. On the left and right sides inside the two chute plates 31, expansion and contraction plates 35 are slidably connected. On the front, back, top, and bottom of the two expansion and contraction plates 35, expansion and contraction plate sliders 36 are fixedly connected. The outer walls of the left and right groups of expansion and contraction plate sliders 36 are slidably connected to the left and right sides of the inner walls of the two guide grooves 32 opened inside the two chute plates 31. On the outer sides of the two expansion and contraction plates 35, rectangular connection pipes 310 are fixedly connected. On the outer sides of the two rectangular connection pipes 310, shock absorption plate connection plates 38 are fixedly connected. On the front and back sides of the two rectangular connection pipes 310 near the expansion and contraction plates 35, rotating rods 37 are rotatably connected. On the top and bottom of the front and back sides of the two shock absorption plate connection plates 38, hinge grooves 39 are opened. On the outer sides of the two expansion and contraction plates 35, rectangular connection pipes 310 are fixedly connected. On the outer sides of the two rectangular connection pipes 310, shock absorption plate connection plates 38 are fixedly connected. On the front and back sides of the two rectangular connection pipes 310 near the expansion and contraction plates 35, rotating rods 37 are rotatably connected. On the top and bottom of the front and back sides of the two shock absorption plate connection plates 38, hinge grooves 39 are opened. On the side of the outer two groups of double hinge rods 312 away from the shock absorption plate connection plates 38, shock absorption plate connection blocks 313 are rotatably connected. On the side of the left and right groups of shock absorption plate connection blocks 313 away from the double hinge rods 312, shock absorption plates 316 are fixedly connected. The left and right groups of shock absorption plate connection blocks 313 are fixedly connected to the four sides of the two shock absorption plates 316. The outer sides of the two shock absorption plates 316 are in contact with the inner sides of the middle two webs 2. The support component 4 includes two vertical plates 41. The inner sides of the two vertical plates 41 are fixedly connected to the middle parts of the front and back sides of the two chute plates 31. In the middle of the outer sides of the two vertical plates 41, guide cross bars 44 are fixedly connected. On the top and bottom of the outer sides of the two vertical plates 41, second springs 43 are fixedly connected. On the four sides of the outer walls of the two guide cross bars 44, guide cross bar chute grooves 45 are opened. On the side of the outer two groups of double hinge rods 312 away from the shock absorption plate connection plates 38, shock absorption plate connection blocks 313 are rotatably connected. On the side of the left and right groups of shock absorption plate connection blocks 313 away from the double hinge rods 312, shock absorption plates 316 are fixedly connected. The left and right groups of shock absorption plate connection blocks 313 are fixedly connected to the four sides of the two shock absorption plates 316. The outer sides of the two shock absorption plates 316 are in contact with the inner sides of the middle two webs 2. On the sides of the inner walls of the two guide cross bars 44 away from each other, double hinge sliders 48 are slidably connected. In the middle of the inner walls of the two double hinge sliders 48, expansion and contraction rods 49 are fixedly connected. On the left and right sides of the two expansion and contraction rods 49, they extend to the outer walls of the two guide cross bars 44. On the top and bottom of the two double hinge sliders 48, double hinge rotating rods 47 are rotatably connected. On the side of the two groups of double hinge rotating rods 47 away from the double hinge sliders 48, they extend to the top and bottom of the outer walls of the two guide cross bars 44 and are rotatably connected to sliders 46.The outer walls of the left and right sets of sliders 46 are respectively slidably connected to the inner walls of the two vertical plate guide grooves 42 opened in the two vertical plates 41. The outer sides of the left and right sets of sliders 46 are fixedly connected to the inner ends of the left and right sets of second springs 43. The two expansion and contraction rods 49 extend to the top and bottom on both sides of the outer wall of the guide cross bar 44 and are fixedly connected with L-shaped expansion and contraction rods 410. The outer walls of the top and bottom sets of L-shaped expansion and contraction rods 410 are slidably connected with rack rod chute plates 412. The inner sides of the top and bottom sets of rack rod chute plates 412 are respectively fixedly connected to the middle parts on the outer sides of the two chute plates 31. The sides of the left and right sets of L-shaped expansion and contraction rods 410 away from the rack rod chute plates 412 are fixedly connected with rack rods 411. The left and right sides of the two expansion and contraction rods 49 are rotatably connected to the sides of the left and right sets of rotating rods 37 away from the rectangular connection pipes 310. The outer sides of the left and right sets of rack rods 411 are rotatably connected with gears 413. The inner walls of the left and right sets of gears 413 are rotatably connected to the outer walls of the four gear connection blocks 33 fixed on the outer sides of the two chute plates 31. The outer walls of the left and right sets of gears 413 are fixedly connected with inclined rods 414. The sides of the left and right sets of inclined rods 414 away from the gears 413 are rotatably connected with L-shaped support plate connecting rods 415. The sides of the left and right sets of L-shaped support plate connecting rods 415 away from the inclined rods 414 are fixedly connected with support plates 416. The outer sides of the left and right sets of support plates 416 are respectively in contact with the top and bottom of the inner sides of the two middle webs 2;

[0034] When the blade body 1 starts to vibrate, two shock-absorbing plates 316 will be triggered first. They are squeezed by the two middle webs 2, so they will deform. This deformation will cause the shock-absorbing plate connection blocks 313 on the four sides of the two shock-absorbing plates 316 to start to move, and then cause the rotation of the double hinge rods 312. As the double hinge rods 312 rotate, the double hinge blocks 311 hinged to the inner walls of the hinge grooves 39 opened in the shock-absorbing plate connection plates 38 also start to rotate. This rotation will continue to be transmitted to the double hinge rods 312 on the other side. Through the spring connection blocks 314, the spring 315 is gradually stretched. At this time, the spring 315 will deform due to the stretching, so as to carry out a preliminary buffering treatment on the impact force received by the shock-absorbing plate 316;

[0035] In the case where the blade body 1 generates large vibrations, the two shock-absorbing plates 316 will be further squeezed by the web 2. When this squeezing reaches a certain degree such that the two shock-absorbing plates 316 and the shock-absorbing plate connecting plate 38 cannot withstand the pressure exerted by the web 2, the shock-absorbing plate connecting plate 38 will, through the action of the rectangular connecting pipe 310, guide the two expanding and contracting plates 35 to slide inside the two chute plates 31. During the sliding process, the expanding and contracting plates 35 will smoothly slide along the inner walls of the two guiding grooves 32 by means of the expanding and contracting plate sliders 36. At the same time, as the expanding and contracting plates 35 slide, the rectangular connecting pipe 310 will also drive the shock-absorbing plate connecting plate 38 to move accordingly. During the movement of the shock-absorbing plate connecting plate 38, it will drive the expanding and contracting rod 49 to rotate through the action of the rotating rod 37. During the rotation of the expanding and contracting rod 49, it will slide along the inner walls of the two guiding cross bars 44 by means of the bidirectional articulated slider 48. Subsequently, during the rotation of the two expanding and contracting rods 49, through the action of the bidirectional articulated rotating rod 47, it will guide the slider 46 to slide along the inner walls of the two vertical plate guiding grooves 42. During the sliding process, the slider 46 will exert pressure on the second spring 43, causing the second spring 43 to deform. This deformation enables the second spring 43 to effectively buffer the impact force received by the blade body 1 a second time, thereby reducing the impact of vibrations on the blade body 1;

[0036] In the shock-absorbing mechanism of the wind turbine blade, during the sliding process of the two expanding and contracting rods 49, they will drive the L-shaped expanding and contracting rod 410 to smoothly slide along the inner wall of the rack bar chute plate 412. As the L-shaped expanding and contracting rod 410 slides, it will further drive the rack bar 411 to move precisely. During the movement of the rack bar 411, it will engage with the gear 413, causing the gear 413 to start rotating. The rotation of the gear 413 will drive the inclined rod 414 to move accordingly. During the movement of the inclined rod 414, it is connected to the support plate 416 through the L-shaped support plate connecting rod 415, thereby enabling the support plate 416 to effectively support the upper and lower sides of the inner side of the web 2. This support method further enhances the stability of the entire blade body 1, significantly reducing the displacement caused by vibrations. Therefore, the vibration amplitude of the wind turbine blade during operation is effectively reduced, thereby improving the power generation efficiency and operating stability of the wind turbine. In addition, this shock-absorbing mechanism can buffer the different impact forces received by the blade body 1 correspondingly, greatly improving the stability of the wind turbine blade during use. The design of the entire shock-absorbing mechanism is both ingenious and structurally compact, not only improving the shock-absorbing effect but also ensuring the strength and durability of the wind turbine blade, thereby extending the service life of the wind turbine. At the same time, the installation and maintenance process of this shock-absorbing mechanism is simple and easy, which greatly reduces the operating cost of the wind turbine. And due to its high efficiency and reliability, it has broad application prospects.

[0037] Working principle of the present invention: When the blade body 1 vibrates, first, the two shock-absorbing plates 316 are squeezed by the two webs 2 in the middle and deformed. At this time, the shock-absorbing plate connecting blocks 313 on the four sides of the two shock-absorbing plates 316 drive the bidirectional hinge rod 312 to rotate. The rotation of the bidirectional hinge rod 312 drives the bidirectional hinge block 311 hinged on the inner wall of the hinge groove 39 opened in the shock-absorbing plate connecting plate 38 to rotate, and then drives the bidirectional hinge rod 312 on the other side to rotate and gradually stretch the spring 315 through the spring connecting block 314. At this time, the spring 315 deforms and initially buffers the impact force received by the shock-absorbing plate 316. When the vibration generated by the blade body 1 is large, the two shock-absorbing plates 316 are further squeezed by the web 2. When the two shock-absorbing plates 316 and the shock-absorbing plate connecting plate 38 cannot bear the pressure brought by the web 2, at this time, the two shock-absorbing plate connecting plates 38 drive the two expansion and contraction plates 35 to slide inside the two chute plates 31 through the rectangular connecting pipe 310. During the sliding process of the two expansion and contraction plates 35, they slide along the inner walls of the two guide grooves 32 through the expansion and contraction plate sliders 36. At this time, during the sliding process of the two expansion and contraction plates 35, they drive the shock-absorbing plate connecting plate 38 to move through the rectangular connecting pipe 310. During the moving process of the shock-absorbing plate connecting plate 38, it drives the expansion and contraction rod 49 to rotate through the rotating rod 37. During the rotating process of the expansion and contraction rod 49, it slides along the inner walls of the two guide cross bars 44 through the bidirectional hinge slider 48. At this time, during the rotating process of the two expansion and contraction rods 49, they drive the slider 46 to slide along the inner walls of the two vertical plate guide grooves 42 through the bidirectional hinge rotating rod 47. During the sliding process of the slider 46, it squeezes the second spring 43. At this time, the second spring 43 deforms and secondarily buffers the impact force received by the blade body 1. During the sliding process of the two expansion and contraction rods 49, they drive the L-shaped expansion and contraction rod 410 to slide along the inner wall of the rack bar chute plate 412. During the sliding process of the L-shaped expansion and contraction rod 410, it drives the rack bar 411 to move. During the moving process of the rack bar 411, it drives the gear 413 to rotate. During the rotating process of the gear 413, it drives the inclined rod 414 to move. During the moving process of the inclined rod 414, it drives the support plate 416 to move through the L-shaped support plate connecting rod 415. At this time, the support plate 416 supports the upper and lower sides inside the web 2.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-vibration-reducing wind turbine blade with a mass-tuned damper, characterized in that: It comprises a blade body (1), the inner wall of the blade body (1) is fixedly connected with a plurality of webs (2), the inner sides of two middle webs (2) are provided with shock absorbing components (3), and the outer wall of the shock absorbing components (3) is provided with a supporting component (4); The shock absorbing assembly (3) comprises two slide slot plates (31), the front and rear sides of the inner sides of the two slide slot plates (31) are provided with guide slots (32), the outer four sides of the two slide slot plates (31) are fixedly connected with gear connecting blocks (33), and the middle parts of the inner sides of the two slide slot plates (31) are fixedly connected with a cross plate (34); The support assembly (4) comprises two vertical plates (41), the inner sides of the two vertical plates (41) are fixedly connected to the middle parts of the front and rear sides of the two slide slot plates (31), the outer middle parts of the two vertical plates (41) are fixedly connected to guide cross bars (44), the tops and bottoms of the outer sides of the two vertical plates (41) are fixedly connected to second springs (43), and the outer walls of the two guide cross bars (44) are provided with guide cross bar slide slots (45) on four sides.

2. A self-vibration damping wind turbine blade with a mass tuned damper according to claim 1, characterized in that: The left and right sides of the inner sides of the two slide groove plates (31) are both slidably connected with a retracting and expanding plate (35), the front and rear sides of the top and bottom of the two retracting and expanding plates (35) are both fixedly connected with retracting and expanding plate sliders (36), and the outer walls of the left and right groups of the retracting and expanding plate sliders (36) are both slidably connected to the left and right sides of the inner walls of the two guide grooves (32) opened on the inner sides of the two slide groove plates (31).

3. A self-vibration damping wind turbine blade with a mass tuned damper according to claim 2, characterized in that: The outer sides of the two expansion and retraction plates (35) are fixedly connected with rectangular connecting tubes (310), the outer sides of the two rectangular connecting tubes (310) are fixedly connected with shock-absorbing plate connecting plates (38), the front and rear sides of the two rectangular connecting tubes (310) are rotatably connected with rotating rods (37) on one side close to the expansion and retraction plates (35), and the tops and bottoms of the front and rear sides of the two shock-absorbing plate connecting plates (38) are provided with hinge grooves (39).

4. A self-vibration-damping wind turbine blade with a mass-tuned damper according to claim 3, characterized in that: The inner sides of the left and right groups of the hinge grooves (39) are both rotatably connected with bidirectional hinge blocks (311), the left and right sides of the left and right groups of the bidirectional hinge blocks (311) are both rotatably connected with bidirectional hinge rods (312), the inner two groups of the bidirectional hinge rods (312) are both rotatably connected with spring connection blocks (314) on one side close to the rectangular connecting tube (310), the left and right groups of the spring connection blocks (314) are both fixedly connected with springs (315) on one side, and the ends of the left and right groups of the springs (315) away from the spring connection blocks (314) are both fixedly connected to the outer walls on the inner sides of the two damping plate connecting plates (38).

5. A self-vibration damping wind turbine blade with a mass tuned damper according to claim 4, characterized in that: The two outer groups of bidirectional hinged rods (312) are rotatably connected to the side of the shock-absorbing plate connecting plate (38) away from the shock-absorbing plate connecting plate (38), and the left and right groups of shock-absorbing plate connecting blocks (313) are fixedly connected to the shock-absorbing plates (316) on the side away from the bidirectional hinged rods (312). The left and right groups of shock-absorbing plate connecting blocks (313) are fixedly connected to the four sides of the two shock-absorbing plates (316), and the outer sides of the two shock-absorbing plates (316) are both in contact with the inner sides of the two middle webs (2).

6. The self-vibration-damping wind turbine blade with a mass-tuned damper according to claim 1, characterized in that: The inner walls of the two guide cross bars (44) are slidably connected to the sides away from each other with bidirectional hinged sliders (48), and the middle parts of the inner walls of the two bidirectional hinged sliders (48) are fixedly connected to the expansion rods (49), and the left and right sides of the two expansion rods (49) extend to the outer walls of the two guide cross bars (44). The tops and bottoms of the two bidirectional hinged sliders (48) are rotatably connected to the bidirectional hinged rotating rods (47), and the sides of the two groups of bidirectional hinged rotating rods (47) away from the bidirectional hinged sliders (48) extend to the tops and bottoms of the outer walls of the two guide cross bars (44) and are rotatably connected to the sliders (46), and the outer walls of the left and right groups of the sliders (46) are respectively slidably connected to the inner walls of the two vertical plate guide grooves (42) opened on the two vertical plates (41), and the outer sides of the left and right groups of the sliders (46) are fixedly connected to the inner ends of the left and right groups of second springs (43).

7. A self-vibration damping wind turbine blade with a mass tuned damper according to claim 6, characterized in that: The two expansion rods (49) extend to the top and bottom of both sides of the outer wall of the guide cross bar (44), and are fixedly connected with L-shaped expansion rods (410); the outer walls of the top and bottom groups of the L-shaped expansion rods (410) are slidably connected with rack rod sliding groove plates (412); the inner sides of the top and bottom groups of the rack rod sliding groove plates (412) are respectively fixedly connected to the middle parts of the outer sides of the two sliding groove plates (31); and the left and right groups of the L-shaped expansion rods (410) are fixedly connected with rack rods (411) on the sides away from the rack rod sliding groove plates (412).

8. The self-vibration-damping wind turbine blade with a mass-tuned damper according to claim 6, characterized in that: The left and right sides of the two expansion rods (49) are both rotatably connected to the side of the two groups of rotation rods (37) away from the rectangular connection tube (310).

9. The self-vibration-reducing wind turbine blade with a mass-tuned damper according to claim 7, characterized in that: The outer sides of the left and right groups of rack rods (411) are both rotatably connected to gears (413), the inner walls of the left and right groups of gears (413) are both rotatably connected to the outer walls of four gear connecting blocks (33) fixed on the outer sides of the two slide slot plates (31), and the outer walls of the left and right groups of gears (413) are both fixedly connected to inclined rods (414).

10. A self-vibration damping wind turbine blade with a mass tuned damper according to claim 9, characterized in that: The sides of the left and right groups of inclined rods (414) away from the gear (413) are both rotatably connected to an L-shaped support plate connecting rod (415), and the sides of the left and right groups of L-shaped support plate connecting rods (415) away from the inclined rods (414) are both fixedly connected to a support plate (416), and the outer sides of the left and right groups of support plates (416) are both in contact with the top and bottom of the inner sides of the two middle webs (2).

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