A wind turbine blade wind and sand impact protection structure

Abstract

This invention discloses a wind turbine blade anti-sand impact protection structure, relating to the field of wind power equipment technology, including towers, buried piles, hubs, plugs, columnar plugs, blades, and chassis. In this invention, a protective coating made of elastic material particles buffers sand particles. By designing the windward side of the blade with an arc-shaped convex surface, sand particles are deflected at a certain angle upon contact with the blade surface, reducing sand adhesion and erosion, effectively preventing long scratches. Furthermore, this protective structure incorporates multiple wind barrier measures. When sand approaches the blade, it changes the direction of sand particles, reducing the number of sand particles impacting the blade and lowering the impact force. The combined effect of these three wind barriers significantly reduces the impact of sand particles on the blade, achieving reliable protection.

Description

Technical Field

[0001] This invention relates to the field of wind power equipment, and in particular to a wind turbine blade anti-sand impact protection structure. Background Technology

[0002] Wind power equipment is a device that uses wind energy to rotate blades, which then converts wind energy into electrical energy through a generator. Its advantages include being clean and environmentally friendly, having abundant resources, short construction cycles, and flexible installation scale. Currently, China's wind power equipment has been exported to more than 50 countries and regions worldwide, with a total power generation capacity exceeding 5,000 megawatts. It boasts leading technology and a complete industrial chain.

[0003] During the operation of wind turbines, the high-speed rotating blades (with blade tip speeds reaching 80 m / s) are subjected to severe abrasion by sand particles in dusty environments, leading to coating loss, structural damage, and reduced power generation efficiency. Existing wind turbine blades are protected only by a single coating, which is not reliable enough. Therefore, we propose a wind turbine blade anti-sand impact protection structure. Summary of the Invention

[0004] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies and provide a wind turbine blade anti-sand impact protection structure. The protective coating, made of elastic material particles, buffers sand particles. By designing an arc-shaped convex surface on the windward side of the blade, sand particles are deflected at a certain angle upon contact with the blade surface, reducing sand adhesion and erosion, and effectively preventing long scratches. Furthermore, this protective structure incorporates multiple wind barrier measures. When sand approaches the blade, it changes the direction of sand particles, reducing the number of sand particles impacting the blade and decreasing the impact force. The combined effect of these three wind barriers significantly reduces the impact of sand particles on the blade, achieving reliable protection and effectively solving the problems in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wind turbine blade anti-sand impact protection structure, comprising a tower, buried piles, a hub, a plug, a columnar plug, wind blades, and a chassis, characterized in that: the tower is vertically arranged and a buried pile is fixedly connected to its lower end; a chassis is installed at the upper end of the tower, and a power generation device is installed inside the chassis; a hub is rotatably connected to the front end of the chassis via a drive shaft; three plugs are fixedly connected in a circular array on the outer side of the hub; three wind blades are provided; the wind blades use high-strength composite material as the main beam and are filled with lightweight core material; one end of the wind blade is a cylindrical plug, which is inserted into and fixedly connected to the inside of the plug; the end of the wind blade away from the cylindrical plug gradually narrows.

[0006] The tower, hub, blades, and casing together constitute the main structure of a wind turbine. Buried piles underground enhance the stability of the wind turbine installation. The blades are installed by connecting to inserts on the outside of the hub via cylindrical plugs at their ends. When the blades rotate under wind power, the power generation unit inside the casing generates electricity. The blades use high-strength composite materials as the main beam, giving them high strength and the ability to withstand the impact of wind and sand.

[0007] Furthermore, the cross-section of the wind blade is crescent-shaped, and its windward surface is a convex curved structure. The outward convexity of the windward surface of the wind blade allows sand particles to bounce off the surface of the wind blade at a certain angle when they come into contact with it, reducing the adhesion and erosion of sand particles on the blade surface and effectively avoiding the formation of long scratches.

[0008] Furthermore, a protective coating is also included. The outer side of the windward side of the wind blade is coated with a protective coating made of elastic material particles. The protective coating made of elastic material particles can buffer sand particles, protect the original paint surface of the wind blade, and prevent wind and sand erosion.

[0009] Furthermore, it also includes a spoiler, which is located on the front side of the hub. An electric motor is embedded inside the hub, with its output shaft extending forward and fixedly connected to the central axis of the spoiler. The spoiler is a circular cap-like structure, with a ring of blades equidistantly fixed to its outer circumference. The blades are coplanar with the central axis of the spoiler. The electric motor embedded in the hub drives the spoiler to rotate. When the spoiler rotates, its outer blades form a wind wall structure parallel to the wind blades in front. When the external natural wind blows perpendicularly towards the wind blades, the wind wall formed by the spoiler can change the direction of sand particles in the wind, reducing the number of sand particles hitting the wind blades and lowering the impact force, thus providing initial protection.

[0010] Furthermore, it also includes a front locking block and a rear locking block. The fan blade is fixedly connected to the middle side of the outward-facing section of the columnar plug. A locking block and a rear locking block are fixedly connected to the outward-facing section of the columnar plug. The front locking block is locked onto the front side of the fan blade, and the rear locking block supports the back of the fan blade. The protrusion height of the rear locking block is higher than that of the front locking block. The front and rear locking blocks together clamp the root of the fan blade, and the rear locking block also provides support to the back of the fan blade.

[0011] Furthermore, it also includes an air collection channel, an air gathering slot, and an arc-shaped air outlet. An air collection channel is located on the outer side of the cylindrical plug, corresponding to the rotation direction of the fan blades. The air collection channel is close to the front retaining block. An arc-shaped air outlet is located where the front retaining block fits against the fan blades. The arc-shaped air outlet is narrow. An air gathering slot is also located inside the front retaining block. The air collection channel connects to the arc-shaped air outlet through the air gathering slot. The air collection channel corresponds to the rotation direction of the fan blades, allowing a certain amount of airflow to be collected as the cylindrical plug rotates with the hub. This airflow is then fed into the air collection channel and fed through the air gathering slot to the arc-shaped air outlet. The narrow width of the arc-shaped air outlet can increase the pressure and speed of the blown air. The airflow blowing from the arc-shaped air outlet closely adheres to the windward surface of the fan blades, forming a wind wall protection effect on the surface of the fan blades, further reducing the impact of sand particles on the fan blades.

[0012] Furthermore, it also includes a mounting frame and a dust filter. A dust filter is installed at the port of the air collection channel, and a mounting frame is fitted around the outer edge of the dust filter. The mounting frame is fixedly connected to the inner wall of the air collection channel port. The mounting frame is used for installing and fixing the dust filter. By installing a dust filter at the port of the air collection channel, sand particles or other debris in the air can be prevented from entering the air collection channel, thus avoiding blockage.

[0013] Furthermore, it also includes a guide vane and fixing bolts. The guide vane is installed on the narrower edge of the fan blade. The cross-section of the guide vane is J-shaped. The straight section of the J-shaped guide vane fits against the back of the narrower side of the fan blade, and this straight section is fixedly connected to the fan blade by a row of fixing bolts arranged in a linear array. The fixing bolts are used to install and fix the guide vane on the narrower edge of the fan blade.

[0014] Furthermore, the arc-shaped section of the deflector extends to the front of the wind blade, and the curvature of this arc-shaped section is equal to the curvature of the windward surface of the wind blade. The deflector enables the wind force blowing towards the windward surface of the wind blade to be redirected when passing the edge of the blade, forming a third wind force barrier at the windward surface of the wind blade, thereby greatly reducing the impact of sand particles on the wind blade.

[0015] Furthermore, the air collection channel has a 90° fan-shaped structure, and the port connecting the air gathering slot and the air collection channel has an outwardly expanding chamfered structure. The internal arc surface of the air collection channel ensures the smooth flow of air inside, and the chamfered structure at the air gathering slot improves the smoothness of air flow towards the arc-shaped air outlet.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This wind turbine blade anti-sand impact protection structure has the following advantages: 1. By optimizing the material of the wind turbine blades, the structural strength of the blades can be improved. Furthermore, the protective coating made of elastic material particles can buffer sand particles, protect the original paint of the blades, and prevent wind and sand erosion. 2. By designing the windward side of the wind blades with an arc-shaped convex surface, sand particles can bounce off the surface of the wind blades at a certain angle when they come into contact with the blades, reducing the adhesion and scouring of sand particles on the blade surface and effectively avoiding the formation of long scratches. 3. This protective structure has multiple wind wall protection measures: When the motor drives the spoiler to rotate, it can form the first wind wall protection parallel to the front of the wind blades. When sand and wind approach the wind blades, it can change the direction of the sand particles in the wind, reduce the number of sand particles hitting the wind blades, and reduce the impact force. 4. When the column-shaped plug rotates with the hub, it can collect wind power, and the wind force blown out from the arc-shaped air outlet closely adheres to the windward side of the wind blades, forming a second wind wall protection; the deflector can cause the wind force blowing towards the windward side of the wind blades to be turned when passing the edge of the blades, forming a third wind force barrier at the windward side of the wind blades. The three wind force barriers work together to greatly reduce the impact of sand particles on the wind blades and achieve a reliable protection effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front oblique side of the present invention.

[0018] Figure 2 This is a schematic diagram of the rear oblique lower side structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the rear oblique upper side structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure on the top side of the present invention.

[0021] Figure 5 This is a schematic diagram of the cross-section of the wind turbine blade in this invention.

[0022] Figure 6 This is the present invention. Figure 2 Enlarged view of the structure at point A in the middle.

[0023] Figure 7 This is the present invention. Figure 3 Enlarged view of the structure at point B.

[0024] Figure 8 This is the present invention. Figure 4 Enlarged view of the structure at point C.

[0025] Explanation of reference numerals in the attached figures: 1. Tower column; 2. Buried pile; 3. Hub; 4. Plug; 5. Column plug; 6. Fan blade; 7. Protective coating; 8. Spoiler wheel; 9. Air collection duct; 10. Air gathering slot; 11. Arc-shaped air outlet; 12. Mounting frame; 13. Dust filter; 14. Air guide frame; 15. Fixing bolts; 16. Chassis; 17. Front locking block; 18. Rear locking block. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1-8 This embodiment provides a technical solution: a wind turbine blade anti-sand impact protection structure, including a tower 1, buried piles 2, hub 3, plug 4, column plug 5, wind blades 6, and a chassis 16. The tower 1 is vertically arranged and has buried piles 2 fixedly connected to its lower end. A chassis 16 is installed at the upper end of the tower 1. A power generation device is installed inside the chassis 16. The front end of the chassis 16 is rotatably connected to the hub 3 via a drive shaft. Three plugs 4 are fixedly connected in a circular array on the outer side of the hub 3. Three wind blades 6 are provided. The wind blades 6 use high-strength composite material as the main beam and are filled with lightweight core material. One end of the wind blade 6 is a cylindrical plug 5, which is inserted into and fixedly connected to the inside of the plug 4. The end of the wind blade 6 away from the cylindrical plug 5 gradually narrows.

[0028] The tower 1, hub 3, blades 6, and casing 16 together constitute the main structure of the wind turbine. Buried piles 2 underground improve the stability of the wind turbine installation. The blades 6 are installed by connecting the end-mounted plugs 5 to the inserts 4 on the outside of the hub 3. When the blades 6 rotate under wind power, the power generation device inside the casing 16 generates electricity. The blades 6 use high-strength composite materials as the main beam, giving them high strength and the ability to withstand the impact of wind and sand.

[0029] The cross-section of the wind blade 6 is crescent-shaped, and its windward side is a convex curved structure. The outward convexity of the windward side of the wind blade 6 allows sand particles to bounce off the surface of the wind blade 6 at a certain angle when they come into contact with it, reducing the adhesion and erosion of sand particles on the blade surface and effectively avoiding the formation of long scratches.

[0030] It also includes a protective coating 7, which is applied to the outer side of the windward side of the wind blade 6. The protective coating 7 is made of elastic material particles. The protective coating 7, made of elastic material particles, can buffer sand particles, protect the original paint surface of the wind blade 6, and prevent wind and sand erosion.

[0031] It also includes a spoiler 8, which is located on the front side of the hub 3. An electric motor is embedded inside the hub 3, with its output shaft extending forward and fixedly connected to the central axis of the spoiler 8. The spoiler 8 has a circular cover structure, with a ring of blades fixedly connected at equal intervals on its outer circumference. The blades are coplanar with the central axis of the spoiler 8. The electric motor embedded inside the hub 3 drives the spoiler 8 to rotate. When the spoiler 8 rotates, its outer blades form a wind wall structure parallel to the front of the wind blades 6. When the natural wind blows perpendicularly towards the wind blades 6, the wind wall formed by the spoiler 8 can change the direction of sand particles in the wind, reducing the number of sand particles hitting the wind blades 6 and lowering the impact force, thus providing initial protection.

[0032] It also includes a front locking block 17 and a rear locking block 18. The fan blade 6 is fixedly connected to the middle side of the outward-facing section of the columnar plug 5. The outward-facing section of the columnar plug 5 is fixedly connected to a locking block 17 and a rear locking block 18. The front locking block 17 is locked onto the front side of the fan blade 6, and the rear locking block 18 supports the back of the fan blade 6, with the protrusion height of the rear locking block 18 being higher than that of the front locking block 17. The front locking block 17 and the rear locking block 18 together clamp the root of the fan blade 6, and the rear locking block 18 also provides support to the back of the fan blade 6.

[0033] It also includes an air intake channel 9, an air gathering slot 10, and an arc-shaped air outlet 11. An air intake channel 9 is provided on the outside of the column plug 5 at a position corresponding to the rotation direction of the fan blade 6. The air intake channel 9 is close to the front locking block 17. An arc-shaped air outlet 11 is provided at the position where the front locking block 17 fits against the fan blade 6. The arc-shaped air outlet 11 is narrow. An air gathering slot 10 is also provided inside the front locking block 17. The air intake channel 9 is connected to the arc-shaped air outlet 11 through the air gathering slot 10. The air collection channel 9 corresponds to the rotation direction of the wind blade 6, so that when the column plug 5 rotates with the hub 3, a certain amount of wind force can be collected and enter the air collection channel 9, and input into the arc-shaped air outlet 11 along the air gathering slot 10. The arc-shaped air outlet 11 is narrow, which can increase the pressure and speed of the blown wind force. The wind force blown out from the arc-shaped air outlet 11 is close to the windward surface of the wind blade 6, which can form a wind wall protection effect on the surface of the wind blade 6, further reducing the impact of sand particles on the wind blade 6.

[0034] It also includes a mounting frame 12 and a dust filter 13. A dust filter 13 is installed at the port of the air collection duct 9, and a mounting frame 12 is fitted around the outer edge of the dust filter 13. The mounting frame 12 is fixedly connected to the inner wall of the port of the air collection duct 9. The mounting frame 12 is used for the installation and fixation of the dust filter 13. By installing the dust filter 13 at the port of the air collection duct 9, sand particles or other debris in the air can be prevented from entering the interior of the air collection duct 9, thus avoiding blockage.

[0035] It also includes a guide frame 14 and fixing bolts 15. The guide frame 14 is installed on the narrower edge of the fan blade 6. The cross-section of the guide frame 14 is in the shape of the letter J. The straight section of the J-shaped guide frame 14 fits against the back of the narrower side of the fan blade 6, and this straight section is fixedly connected to the fan blade 6 by a row of fixing bolts 15 arranged in a linear array. The fixing bolts 15 are used to install and fix the guide frame 14 on the narrower edge of the fan blade 6.

[0036] The arc-shaped section of the deflector 14 extends to the front of the wind blade 6, and the curvature of this arc-shaped section is equal to the curvature of the windward surface of the wind blade 6. The deflector 14 can redirect the wind force blowing towards the windward surface of the wind blade 6 as it passes the edge of the blade, forming a third wind barrier at the windward surface of the wind blade 6, thereby greatly reducing the impact of sand particles on the wind blade 6.

[0037] The air intake duct 9 has a 90° fan-shaped structure, and the port connecting the air gathering slot 10 and the air intake duct 9 has an outwardly expanding chamfered structure. The internal arc surface of the air intake duct 9 can ensure the smooth flow of air when it passes through it, and the chamfered structure at the air gathering slot 10 can improve the smooth flow of air to the arc-shaped air outlet 11.

[0038] The working principle of the wind turbine blade anti-sand impact protection structure provided by the present invention is as follows: In this structure, the wind turbine blade 6 uses a high-strength composite material as the main beam, which gives it high strength and the ability to withstand the impact of wind and sand; the protective coating 7 made of elastic material particles can buffer the sand particles, protect the original paint surface of the wind turbine blade 6, and prevent wind and sand erosion; in addition, by designing the windward side of the wind turbine blade with an arc-shaped convex surface, the sand particles can bounce off the surface of the wind turbine blade 6 at a certain angle when they come into contact with the surface of the wind turbine blade 6, reducing the adhesion and scouring of sand particles on the blade surface and effectively avoiding the formation of long scratches. On the other hand, this protective structure has multiple wind wall protection measures, which can change the direction of sand particles in the wind when sand approaches the wind blades, reducing the number of sand particles hitting the wind blades 6 and reducing the impact force: the motor embedded in the hub 3 drives the spoiler 8 to rotate. When the spoiler 8 rotates, its outer blades can form the first wind wall structure parallel to the front of the wind blades 6; the air collection channel 9 corresponds to the rotation direction of the wind blades 6, so that when the columnar plug 5 rotates with the hub 3, it can collect a certain amount of wind force into the air collection channel 9, and input it into the arc-shaped air outlet 11 along the air gathering slot 10. The narrow width allows for increased pressure and speed of the blown air. The air blown from the arc-shaped outlet 11 is close to the windward side of the blade 6, forming a second wind barrier on the surface of the blade 6. The straight section of the J-shaped guide frame 14 is attached to the back of the narrower side of the blade 6, and this straight section is fixedly connected to the blade 6 by a row of fixing bolts 15 arranged in a linear array. The guide frame 14 can cause the wind blowing towards the windward side of the blade 6 to change direction when passing the edge of the blade, forming a third wind barrier at the windward side of the blade 6. The three wind barriers work together to greatly reduce the impact of sand particles on the blade 6. In addition, the front clamping block 17 and the rear clamping block 18 together hold the root of the fan blade 6, and the rear clamping block 18 can also support the back of the fan blade 6; the mounting frame 12 is used for the installation and fixing of the dust filter 13. By installing the dust filter 13 at the port of the air collection channel 9, sand particles or other debris in the air can be prevented from entering the air collection channel 9, thus avoiding blockage; the inner arc surface of the air collection channel 9 can ensure the smooth flow of air inside, and the chamfered structure at the air gathering slot 10 can improve the smoothness of air flowing further to the arc-shaped air outlet 11.

[0039] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A wind turbine blade anti-sand impact protection structure, comprising a tower (1), buried piles (2), a hub (3), a plug (4), a columnar plug (5), wind turbine blades (6), and a chassis (16), characterized in that: The tower column (1) is set vertically and is fixedly connected to the buried pile (2) at the lower end. The upper end of the tower column (1) is equipped with a box (16). The box (16) is equipped with a power generation device. The front end of the box (16) is rotatably connected to a hub (3) through a drive shaft. Three plug cylinders (4) are fixedly connected to the outer side of the hub (3) in a circular array. There are three wind blades (6). The wind blades (6) are made of high-strength composite material as the main beam and filled with lightweight core material. One end of the wind blade (6) is a cylindrical plug (5). The plug (5) is inserted into and fixedly connected to the inside of the plug cylinder (4). The end of the wind blade (6) away from the plug (5) gradually narrows.

2. The wind turbine blade anti-sand impact protection structure according to claim 1, characterized in that: The cross-section of the wind blade (6) is crescent-shaped, and its windward surface is a convex curved structure.

3. The wind turbine blade anti-sand impact protection structure according to claim 2, characterized in that: It also includes a protective coating (7), on the outer side of the windward side of the wind blade (6), the protective coating (7) being made of elastic granular material.

4. The wind turbine blade anti-sand impact protection structure according to claim 1, characterized in that: It also includes a spoiler (8), which is located on the front side of the hub (3). An electric motor is embedded inside the hub (3). The output shaft of the electric motor extends forward and is fixedly connected to the central axis inside the spoiler (8). The spoiler (8) is a circular cover structure, and a ring of blades is fixedly connected at equal intervals on the outer side of the circumference. The blades are coplanar with the central axis of the spoiler (8).

5. The wind turbine blade anti-sand impact protection structure according to claim 1, characterized in that: It also includes a front locking block (17) and a rear locking block (18). The fan blade (6) is fixedly connected to the middle side of the outward section of the column plug (5). The outward section of the column plug (5) is fixedly connected to a locking block (17) and a rear locking block (18). The front locking block (17) is locked on the front side of the fan blade (6), and the rear locking block (18) is supported on the back of the fan blade (6). The protrusion height of the rear locking block (18) is higher than that of the front locking block (17).

6. The wind turbine blade anti-sand impact protection structure according to claim 1, characterized in that... It also includes an air intake channel (9), an air gathering slot (10), and an arc-shaped air outlet (11). An air intake channel (9) is provided on the outer side of the column plug (5) at a position corresponding to the rotation direction of the fan blade (6). The air intake channel (9) is close to the front locking block (17). An arc-shaped air outlet (11) is provided at the position where the front locking block (17) is in contact with the fan blade (6). The arc-shaped air outlet (11) is narrow. An air gathering slot (10) is also provided inside the front locking block (17). The air intake channel (9) is connected to the arc-shaped air outlet (11) through the air gathering slot (10).

7. The wind turbine blade anti-sand impact protection structure according to claim 6, characterized in that: It also includes a mounting frame (12) and a dust filter (13). The dust filter (13) is installed at the port of the air collection channel (9). A mounting frame (12) is fitted around the outer edge of the dust filter (13). The mounting frame (12) is fixedly connected to the inner wall of the port of the air collection channel (9).

8. The wind turbine blade anti-sand impact protection structure according to claim 1, characterized in that: It also includes a guide frame (14) and fixing bolts (15). The guide frame (14) is installed on the edge of the narrower side of the wind blade (6). The cross-section of the guide frame (14) is in the shape of the letter J. The straight section of the J-shaped guide frame (14) is attached to the back of the narrower side of the wind blade (6), and the straight section is fixedly connected to the wind blade (6) by a row of fixing bolts (15) arranged in a linear array.

9. The wind turbine blade anti-sand impact protection structure according to claim 8, characterized in that: The arc-shaped section of the guide frame (14) extends around the front side of the wind blade (6), and the curvature of the arc-shaped section is equal to the curvature of the windward surface of the front side of the wind blade (6).

10. A wind turbine blade anti-sand impact protection structure according to claim 6, characterized in that: The air collection channel (9) is a 90° fan-shaped structure, and the port where the air gathering slot (10) connects to the air collection channel (9) is a chamfered structure that expands outward.

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