Wind power blade assembly and wind generating set

Abstract

The invention discloses a wind power blade assembly and a wind generating set, and relates to the technical field of wind power generation, the wind power blade assembly comprises a blade body, a profiling air bag, an air supply device and a negative pressure device; the suction surface and the pressure surface are oppositely arranged in the thickness direction, and the front edge and the rear edge are oppositely arranged in the width direction. A plurality of dust removal air holes are formed in the suction surface and / or the pressure surface; a sunken part is arranged on one side of the pressure surface close to the rear edge; the profiling air bag is arranged in the concave part and comprises a first bag body and a second bag body, and the first bag body and the second bag body define an inflation cavity. The air supply device is used for supplying air to the dust removal air holes to blow dust on the surface of the blade body; the air supply device is used for supplying air to the inflation cavity so that the profiling air bag can be inflated and expanded. The negative pressure device is used for conducting negative pressure suction operation on the inflation cavity so that the profiling air bag can contract. According to the scheme, the technical problem that normal operation is affected due to the fact that sand and dust are prone to being accumulated on the wind power blade in the severe environment with large windy sand can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind turbine blade assembly and a wind turbine generator set. Background Art

[0002] In the field of wind power generation, wind turbine blades, as key components of wind turbines, have a direct impact on their operating condition, both in terms of power generation efficiency and equipment lifespan. Large-scale wind turbines are increasingly being deployed in areas with strong winds and harsh environments, such as the Gobi Desert. While these regions are rich in wind energy resources, they also suffer from high levels of dust and sand in the air. As wind turbine blades operate, dust particles continuously impact and adhere to the blade surfaces, causing them to accumulate easily.

[0003] Dust accumulation significantly impacts the aerodynamic performance of wind turbine blades, altering their aerodynamic shape and increasing surface roughness, thereby reducing wind turbine efficiency. Furthermore, abrasive particles in the dust continuously wear the blade surface, which, in the long term, can compromise the blade's structural integrity and service life. Currently, to ensure the proper operation of wind turbines, regular manual dust removal is commonly used. However, this approach has numerous drawbacks. Manual dust removal is not only inconvenient, requiring professionals to carry equipment and climb onto the wind turbine blades for cleaning, posing a significant safety risk. It also carries high labor costs, especially in large wind farms, where frequent dust removal consumes significant human and material resources. More critically, manual dust removal often requires downtime, during which the wind turbine cannot generate electricity, directly impacting the farm's revenue and reducing the economic viability of wind power generation. Therefore, effectively addressing the problem of dust accumulation on wind turbine blades in windy and sandy environments is crucial for improving the efficiency and economic viability of wind power generation. Summary of the Invention

[0004] The main purpose of the present invention is to provide a wind turbine blade assembly, which aims to solve the technical problem that wind turbine blades are prone to sand and dust accumulation in harsh environments with strong winds and sand, thereby affecting normal operation.

[0005] To achieve the above-mentioned objectives, the wind turbine blade assembly proposed in the present invention includes:

[0006] A blade body, the blade body having a suction surface and a pressure surface arranged opposite to each other in the thickness direction, and the blade body having a leading edge and a trailing edge arranged opposite to each other in the width direction; the suction surface and / or the pressure surface are provided with a plurality of dust removal holes arranged in an array; the pressure surface is provided with a recessed portion on a side near the trailing edge;

[0007] A contoured airbag, comprising a first bladder body and a second bladder body, wherein the first bladder body is attached to the surface of the recessed portion, and the second bladder body is located on a side of the first bladder body facing away from the recessed portion, and the first bladder body and the second bladder body enclose a gas-filled chamber;

[0008] an air supply device, the air supply device being in communication with the dust removal air hole and the inflation chamber; the air supply device being used to supply air to the dust removal air hole so that the airflow ejected outward through the dust removal air hole blows away the dust on the surface of the blade body; and the air supply device being used to supply air to the inflation chamber so as to inflate the contoured airbag, thereby driving the second bag body away from the first bag body;

[0009] A negative pressure device is used to perform a negative pressure suction operation on the inflation chamber to shrink the contoured airbag, thereby driving the second bag to approach the first bag.

[0010] In one embodiment, the wind turbine blade assembly further includes a heating assembly, which is arranged in the air path between the air supply device and the dust removal air hole; the heating assembly is used to increase the temperature of the air flow ejected outward from the dust removal air hole through a heating operation to melt the ice layer on the surface of the blade body.

[0011] In one embodiment, the dust removal air holes include a plurality of first air holes and a plurality of second air holes, and the plurality of first air holes and the plurality of second air holes are arranged in a space between each other on the suction surface; the air outlet direction of the first air holes forms a first angle with the suction surface, the first angle is 5° to 10°, and the air outlet direction of the first air holes is arranged backward; the air outlet direction of the second air holes is perpendicular to the suction surface;

[0012] When the air supply device supplies air to the first air hole, the gas flow rate of the suction surface increases, thereby increasing the lift of the blade body; when the air supply device supplies air to the second air hole, the gas flow rate of the suction surface decreases, thereby reducing the lift of the blade body.

[0013] In one embodiment, the wind turbine blade assembly further includes a water storage container, and the water storage container and the negative pressure device are in communication with the first air hole and the second air hole;

[0014] In the case where the air supply device supplies air to the first air hole, when the heating component performs a heating operation, the negative pressure device is used to perform a negative pressure suction operation on the second air hole, so as to suck the water formed by the melting of the ice layer on the suction surface into the water storage container through the second air hole;

[0015] In the case where the air supply device supplies air to the second air hole, when the heating component performs a heating operation, the negative pressure device is used to perform a negative pressure suction operation on the first air hole, so as to suck the water body formed after the ice layer on the suction surface melts into the water storage container through the first air hole.

[0016] In one embodiment, the suction surface is provided with a plurality of concave cavity structures, and the cross-sectional area of ​​the concave cavity structures gradually decreases from the outside to the inside; the plurality of first air holes and the plurality of second air holes are arranged in a one-to-one correspondence within the coverage area of ​​the concave cavity structures.

[0017] In one embodiment, the leading edge is provided with a diverter air passage, the diverter air passage extending from front to rear, the rear end of the diverter air passage being connected to the air storage bin of the air supply device and / or extending to the trailing edge;

[0018] The wind turbine blade assembly also includes a cover, a filter and a spray device. The cover is arranged at the leading edge and covers the diverter air duct. The filter is arranged in the diverter air duct. The spray device is connected to the water storage container. When the cover is opened, the airflow at the leading edge enters the diverter air duct. The spray device is used to use the water stored in the water storage container to spray the filter and / or the blade body.

[0019] In one embodiment, the two docking positions between the first bladder and the second bladder are respectively a first joint portion and a second joint portion, and the first joint portion and the second joint portion are arranged at intervals along the width direction of the blade body;

[0020] At least one first partitioning flap is provided in the contoured airbag, one end of the first partitioning flap is connected to the first joint portion, and the other end of the first partitioning flap is connected to the second joint portion; the first partitioning flap divides the inflation chamber into at least two first sub-chambers, and the at least two first sub-chambers are arranged along the thickness direction of the blade body;

[0021] The gas supply device is used to supply gas to at least two of the first sub-chambers in sequence.

[0022] In one embodiment, the wind turbine blade assembly further comprises a regulating module, the regulating module being electrically connected to the heating assembly and the air supply device, and the regulating module pre-stores a mapping relationship table between heating parameters and air supply parameters;

[0023] The adjustment module is used to obtain the real-time heating parameters of the heating component, and the adjustment module is used to call the real-time gas supply parameters corresponding to the real-time heating parameters from the mapping relationship table and send them to the gas supply device to control the gas supply device to supply gas to the corresponding first sub-chamber according to the real-time gas supply parameters.

[0024] In one embodiment, at least one second partitioning flap is provided in the contoured airbag, one end of the second partitioning flap is connected to the first airbag body, and the other end of the second partitioning flap is connected to the second airbag body; the second partitioning flap divides the inflatable chamber into at least two second sub-chambers, and the at least two second sub-chambers are arranged along the width direction of the blade body;

[0025] The gas supply device is used to supply gas to at least two of the second sub-chambers in sequence.

[0026] The present invention further provides a wind turbine generator set, which includes the wind turbine blade assembly as described above.

[0027] The wind turbine blade assembly provided by the present invention can alternately supply air and perform negative pressure suction operations on the contoured airbag through an air supply device and a negative pressure device, while simultaneously supplying air to the dust removal holes through the air supply device. The alternating expansion and contraction of the contoured airbag generates vibrations, causing dust covering the surface of the blade body to separate from the blade body under inertia, while the airflow ejected outward from the dust removal holes blows the separated dust away from the blade body surface. Thus, through the coordinated cooperation between the alternating expansion and contraction of the contoured airbag and the air flow from the dust removal holes, this solution can automatically and efficiently remove dust from the blade body surface without shutting down the machine. This prevents some dust from stubbornly adhering to the blade body and being difficult to remove solely through the airflow ejected from the dust removal holes, resulting in a more thorough dust removal effect, thereby eliminating manual dust removal operations and reducing the significant manpower and material costs associated with frequent dust removal operations. In addition, this solution is based on the deformation characteristics of the contoured airbag, which can flexibly change the aerodynamic shape of the blade body according to actual needs, so as to quickly reduce the load of the blade body under extreme wind conditions, avoiding structural damage caused by overload operation of the blade body at high wind speeds, which is beneficial to improving the operating safety and environmental adaptability of wind turbine blades and extending the service life of wind turbine blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 This is a schematic structural diagram of the contoured airbag in the wind turbine blade assembly provided by the present invention when it is in a contracted state;

[0030] Figure 2This is a schematic structural diagram of the contoured airbag in the wind turbine blade assembly provided by the present invention when it is in an expanded state;

[0031] Figure 3 This is a schematic diagram of the internal structure of the contoured airbag in the wind turbine blade assembly provided by the present invention.

[0032] Description of Figure Numbers:

[0033] 1. Blade body; 101. Suction surface; 102. Pressure surface; 103. Leading edge; 104. Trailing edge; 105. Dust removal holes; 1021. Recessed portion; 1031. Diverter air channel; 1051. First air hole; 1052. Second air hole;

[0034] 2. Contour airbag; 201. First airbag body; 202. Second airbag body; 203. Inflatable chamber; 204. First joint; 205. Second joint; 206. First separator flap; 207. Second separator flap; 2031. First subchamber; 2032. Second subchamber;

[0035] 3. Air supply device; 4. Negative pressure device; 5. Heating component; 6. Water storage container; 7. Cover; 8. Filter; 9. Spray device.

[0036] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] In the field of wind power generation, wind turbine blades, as key components of wind turbines, have a direct impact on their operating condition, both in terms of power generation efficiency and equipment lifespan. Large-scale wind turbines are increasingly being deployed in areas with strong winds and harsh environments, such as the Gobi Desert. While these regions are rich in wind energy resources, they also suffer from high levels of dust and sand in the air. As wind turbine blades operate, dust particles continuously impact and adhere to the blade surfaces, causing them to accumulate easily.

[0041] Dust accumulation significantly impacts the aerodynamic performance of wind turbine blades, altering their aerodynamic shape and increasing surface roughness, thereby reducing wind turbine efficiency. Furthermore, abrasive particles in the dust continuously wear the blade surface, which, in the long term, can compromise the blade's structural integrity and service life. Currently, to ensure the proper operation of wind turbines, regular manual dust removal is commonly used. However, this approach has numerous drawbacks. Manual dust removal is not only inconvenient, requiring professionals to carry equipment and climb onto the wind turbine blades for cleaning, posing a significant safety risk. It also carries high labor costs, especially in large wind farms, where frequent dust removal consumes significant human and material resources. More critically, manual dust removal often requires downtime, during which the wind turbine cannot generate electricity, directly impacting the farm's revenue and reducing the economic viability of wind power generation. Therefore, effectively addressing the problem of dust accumulation on wind turbine blades in windy and sandy environments is crucial for improving the efficiency and economic viability of wind power generation.

[0042] In order to solve the above problems, the present invention provides a wind turbine blade assembly, in which a contoured airbag and a dust removal air hole are arranged on the blade body. The contoured airbag can be alternately inflated and suctioned with negative pressure by an air supply device and a negative pressure device, so that the contoured airbag can expand and contract rapidly to generate vibration, so that the sand and dust covering the surface of the blade body can be temporarily separated from the blade body under the action of the vibration, and then the sand and dust can be blown away by the air flow ejected outward from the dust removal air hole, thereby realizing automatic removal of sand and dust without stopping the machine.

[0043] See also Figure 1 and Figure 2 The wind turbine blade assembly provided by the present invention includes:

[0044] The blade body 1 has a suction surface 101 and a pressure surface 102 disposed opposite to each other along the thickness direction, and a leading edge 103 and a trailing edge 104 disposed opposite to each other along the width direction; the suction surface 101 and / or the pressure surface 102 are provided with a plurality of dust removal holes 105 arranged in an array; a recessed portion 1021 is provided on one side of the pressure surface 102 near the trailing edge 104;

[0045] The contoured airbag 2 includes a first bladder 201 and a second bladder 202. The first bladder 201 is attached to the surface of the recessed portion 1021, and the second bladder 202 is located on the side of the first bladder 201 facing away from the recessed portion 1021. The first bladder 201 and the second bladder 202 enclose an inflatable chamber 203.

[0046] The air supply device 3 is connected to the dust removal air hole 105 and the inflation chamber 203; the air supply device 3 is used to supply air to the dust removal air hole 105, so that the air flow ejected outward through the dust removal air hole 105 blows away the dust on the surface of the blade body 1; and the air supply device 3 is used to supply air to the inflation chamber 203 to inflate the contoured airbag 2, thereby driving the second bag 202 away from the first bag 201;

[0047] The negative pressure device 4 is used to perform a negative pressure suction operation on the inflation chamber 203 to shrink the contoured airbag 2, thereby driving the second bladder 202 to approach the first bladder 201.

[0048] In this embodiment, both the suction surface 101 and the pressure surface 102 are curved surfaces. One side of the suction surface 101 and one side of the pressure surface 102 are connected at a leading edge 103, and the other side of the suction surface 101 and the other side of the pressure surface 102 are connected at a trailing edge 104. The blade body 1 is a structural member with uneven thickness; from the leading edge 103 to the trailing edge 104, the thickness of the blade body 1 continuously changes as the suction surface 101 and the pressure surface 102 extend along the curved path.

[0049] When the wind blows along the width direction of the blade body 1, the airflow is diverted at the leading edge 103. Based on the aerodynamic shape design of the blade body 1, the airflow velocity on the suction surface 101 is faster, while the airflow velocity on the pressure surface 102 is slower. According to Bernoulli's principle, the air pressure at the suction surface 101 is less than the air pressure at the pressure surface 102 at this time. This pressure difference can provide lift for the blade body 1. The direction of the lift is from the high-pressure area (pressure surface 102) to the low-pressure area (suction surface 101), so that the blade body 1 can rotate under the action of this lift, thereby completing power generation.

[0050] The dust removal pores 105 can be configured as microporous structures. The contoured airbag 2 should be made of an elastic material. When the contoured airbag 2 is in a fully contracted state, the first and second bladder bodies 201, 202 are tightly attached to the pressure surface 102. At this time, the first and second bladder bodies 201, 202 do not affect the aerodynamic shape of the blade body 1 itself.

[0051] The air supply device 3 may include an air storage bin and an air pump, which pumps the air from the storage bin outward. The air supply device 3 can be housed within the blade body 1 and connected to the dust removal holes 105 and the inflation chamber 203 of the contoured airbag 2 via corresponding valve structures. By controlling the opening and closing of the valve structures, the air supply device 3 can supply air to the dust removal holes 105 and the inflation chamber 203 according to actual usage requirements. The negative pressure device 4 can be an air pump with a negative pressure suction function.

[0052] In actual application, when the surface of the blade body 1 is covered with sand and dust, air can be first supplied to the inflation chamber 203 through the air supply device 3 to inflate the contoured airbag 2; then the inflation chamber 203 is subjected to a negative pressure suction operation through the negative pressure device 4 to shrink the contoured airbag 2; and then air is supplied to the inflation chamber 203 through the air supply device 3 to re-inflate the contoured airbag 2, and this cycle is repeated; through the rapid alternation of the above-mentioned air supply operation and negative pressure suction operation, the contoured airbag 2 can be alternately expanded and contracted in a short period of time to generate vibration, and the vibration energy is transmitted to the blade body 1, so that the sand and dust covering the surface of the blade body 1 can be separated from the blade body 1 under the action of inertia; at the same time, the air supply device 3 supplies air to the dust removal air hole 105, and the airflow ejected outward from the dust removal air hole 105 can blow the detached sand and dust off the surface of the blade body 1.

[0053] It can be seen that through the coordinated cooperation between the expansion and contraction action of the contoured airbag 2 and the jet operation of the dust removal air hole 105, the dust on the surface of the blade body 1 can be automatically and efficiently removed without stopping the machine, and the situation that some dust stubbornly adheres to the blade body 1 and is difficult to remove only by relying on the airflow jetted from the dust removal air hole 105 can be avoided. The dust removal effect is more thorough, thereby eliminating the manual dust removal operation and reducing the large amount of manpower and material costs consumed by frequent dust removal operations.

[0054] Furthermore, in areas with strong sandstorms and harsh environments, such as the Gobi Desert, extreme wind conditions with extremely high wind speeds may sometimes occur. In such cases, air can be supplied to the inflation chamber 203 through the air supply device 3, causing the contoured airbag 2 to inflate and drive the second airbag 202 away from the first airbag 201. At this point, the second airbag 202 will change the profile of the pressure surface 102, thereby increasing the airflow velocity on the pressure surface 102. Based on the Bernoulli principle, while the airflow velocity on the suction surface 101 remains unchanged, the pressure difference between the suction surface 101 and the pressure surface 102 decreases, thereby reducing the lift and rotational speed of the blade body 1. Thus, this embodiment, based on the deformation characteristics of the contoured airbag 2, can flexibly change the aerodynamic shape of the blade body 1 according to actual needs, thereby quickly reducing the load on the blade body 1 under extreme wind conditions, preventing the blade body 1 from overloading and causing structural damage at high wind speeds. This is beneficial for improving the operational safety and environmental adaptability of wind turbine blades, and extending the service life of wind turbine blades.

[0055] In one embodiment, reference Figure 1 and Figure 2 The wind turbine blade assembly also includes a heating assembly 5, which is arranged in the air path between the air supply device 3 and the dust removal air hole 105; the heating assembly 5 is used to increase the temperature of the air flow ejected outward from the dust removal air hole 105 through a heating operation to melt the ice layer on the surface of the blade body 1.

[0056] In environments with large temperature differences, such as those in the Gobi Desert and on the plateau, especially when exposed to cold air, frost or ice easily forms on the surface of the blade body 1. This can damage the aerodynamic shape of the blade body 1, reduce power generation efficiency, and easily cause vibration and uneven load on the blade body 1, affecting equipment safety. To address this issue, the present embodiment provides a corresponding heating assembly 5. When the air supply device 3 supplies air to the dust removal air holes 105, if frost or ice appears on the surface of the blade body 1, the heating assembly 5 can be activated. The gas will be heated as it passes through the heating assembly 5, and the dust removal air holes 105 will eject a high-temperature hot air flow, which can melt the ice layer on the blade surface. The heating assembly 5 can be electrically heated and housed within the blade body 1.

[0057] Based on the above arrangement, the function of the dust removal holes 105 can be further expanded so that the dust removal holes 105 can not only remove sand and dust but also melt ice.

[0058] Preferably, when the ice layer on the surface of the blade body 1 is relatively thick, while a hot air flow is sprayed toward the ice layer through the dust removal air holes 105, air can be slowly supplied to the inflation chamber 203 through the air supply device 3 to slowly expand the contoured airbag 2. In this way, the ice layer covering the surface of the contoured airbag 2 can be stretched open by the tension provided by the slowly expanding contoured airbag 2, thereby driving the ice layer on the blade body 1 that has been partially melted by the heat and begun to loosen to detach from the surface of the blade body 1.

[0059] In one embodiment, reference Figure 1 and Figure 2 The dust removal air holes 105 include a plurality of first air holes 1051 and a plurality of second air holes 1052, and the plurality of first air holes 1051 and the plurality of second air holes 1052 are arranged to be spaced apart from each other on the suction surface 101; the air outlet direction of the first air holes 1051 forms a first angle with the suction surface 101, and the first angle is 5° to 10°, and the air outlet direction of the first air holes 1051 is arranged to face backward; the air outlet direction of the second air holes 1052 is perpendicular to the suction surface 101;

[0060] When the air supply device 3 supplies air to the first air hole 1051, the gas flow rate of the suction surface 101 increases, thereby increasing the lift of the blade body 1; when the air supply device 3 supplies air to the second air hole 1052, the gas flow rate of the suction surface 101 decreases, thereby reducing the lift of the blade body 1.

[0061] The first air hole 1051 can be set as a microporous structure; the air outlet direction of the first air hole 1051 forms a first angle with the suction surface 101, which means that the axis of the first air hole 1051 and the cross-section of the suction surface 101 at the first air hole 1051 form a first angle; the first angle is set to 5°~10°, and the air outlet direction of the first air hole 1051 is set backward, so that the airflow direction ejected outward from the first air hole 1051 and the flow direction of the external airflow on the surface of the suction surface 101 are close to being parallel to each other, that is, the airflow ejected outward from the first air hole 1051 can form a boosting effect on the external airflow flowing on the surface of the suction surface 101, so that the airflow velocity on the surface of the suction surface 101 can be accelerated, thereby reducing the air pressure at the suction surface 101.

[0062] The second air hole 1052 can be set as a microporous structure; the air outlet direction of the second air hole 1052 is perpendicular to the suction surface 101, which means that the axis of the second air hole 1052 is perpendicular to the cross-section of the suction surface 101 at the second air hole 1052 (or the axis of the second air hole 1052 and the normal of the suction surface 101 at the second air hole 1052 are parallel to each other); in this way, the direction of the airflow ejected outward from the second air hole 1052 and the flow direction of the external airflow on the surface of the suction surface 101 are close to being perpendicular to each other, that is, the airflow ejected outward from the second air hole 1052 can form an obstruction to the external airflow flowing on the surface of the suction surface 101, so as to slow down the airflow velocity on the surface of the suction surface 101, thereby increasing the air pressure at the suction surface 101.

[0063] The air supply device 3 can be connected to the first air hole 1051 and the second air hole 1052 through the corresponding valve structure; by controlling the opening and closing of the valve structure, the air supply device 3 can supply air to the first air hole 1051 and / or the second air hole 1052 according to actual use requirements.

[0064] Based on the above settings, when the wind power equipment is operating normally, if it is necessary to remove the sand and dust on the surface of the blade body 1, air can be supplied to the first air hole 1051 through the air supply device 3, so that while the airflow ejected outward from the first air hole 1051 is used to blow away the sand and dust, the air pressure at the suction surface 101 is reduced by increasing the airflow velocity of the suction surface 101, thereby increasing the air pressure difference between the suction surface 101 and the pressure surface 102, and increasing the lift of the blade body 1, so that the rotation speed of the blade body 1 can be increased when the external wind conditions remain unchanged, thereby improving the power generation efficiency. When it is necessary to reduce the load on the blade body 1, if it is necessary to remove the dust on the surface of the blade body 1, air can be supplied to the second air hole 1052 through the air supply device 3, so that while the airflow ejected outward from the second air hole 1052 is used to blow away the dust, the air pressure at the suction surface 101 is increased by reducing the air flow velocity of the suction surface 101, thereby reducing the air pressure difference between the suction surface 101 and the pressure surface 102, reducing the lift of the blade body 1, and thus achieving the load reduction of the blade body 1.

[0065] In one embodiment, reference Figure 1 and Figure 2 The wind turbine blade assembly further includes a water storage container 6, the water storage container 6, the negative pressure device 4, and the first air hole 1051 and the second air hole 1052 are in communication;

[0066] When the air supply device 3 supplies air to the first air hole 1051 and the heating assembly 5 performs a heating operation, the negative pressure device 4 is used to perform a negative pressure suction operation on the second air hole 1052, so as to suck the water formed by the melting of the ice layer on the suction surface 101 into the water storage container 6 through the second air hole 1052;

[0067] When the air supply device 3 supplies air to the second air hole 1052, when the heating component 5 performs a heating operation, the negative pressure device 4 is used to perform a negative pressure suction operation on the first air hole 1051, so as to suck the water body formed after the ice layer on the suction surface 101 melts into the water storage container 6 through the first air hole 1051.

[0068] Specifically, the water storage container 6 and the negative pressure device 4 can be stored inside the blade body 1; the negative pressure device 4 can adopt an air pump with a negative pressure suction function, and the negative pressure device 4 can be connected to the first air hole 1051 and the second air hole 1052 respectively through the corresponding valve structure. By controlling the opening and closing of the valve structure, the negative pressure device 4 can perform negative pressure suction operation on the first air hole 1051 or the second air hole 1052 according to actual use requirements; the water storage container 6 can be set in the middle of the connecting air path between the negative pressure device 4 and the first air hole 1051 and the second air hole 1052.

[0069] When ice melting operation is required, the heating component 5 can be turned on, and air can be supplied to the first air hole 1051 or the second air hole 1052 through the air supply device 3 to melt the ice layer on the suction surface 101; when the air supply device 3 supplies air to the first air hole 1051, the negative pressure device 4 can perform a negative pressure suction operation on the second air hole 1052, so that the water after the ice layer melts enters the second air hole 1052 under the action of negative pressure, and this part of the water will be collected by the water storage container 6 when flowing through the air path between the second air hole 1052 and the negative pressure device 4; similarly, when the air supply device 3 supplies air to the second air hole 1052, the negative pressure device 4 can perform a negative pressure suction operation on the first air hole 1051, so that the water after the ice layer melts enters the first air hole 1051 under the action of negative pressure, and this part of the water will be collected by the water storage container 6 when flowing through the air path between the first air hole 1051 and the negative pressure device 4. In this way, the recovery of the water body after the ice melt is completed, and the water body stored in the water storage container 6 can be used for cleaning, heat dissipation, cooling and other operations later.

[0070] Based on the scheme of this embodiment, the water body after the ice layer melts can be recycled and reused. On the one hand, it can avoid water accumulation on the surface of the blade body 1 and affect its normal operation. On the other hand, it can maximize the utilization of water resources in a harsh environment of water shortage.

[0071] In one embodiment, reference Figure 1 and Figure 2 The suction surface 101 is provided with a plurality of concave cavity structures (not shown in the figure), and the cross-sectional area of ​​the concave cavity structure gradually decreases from the outside to the inside; a plurality of first air holes 1051 and a plurality of second air holes 1052 are arranged in a one-to-one correspondence within the coverage area of ​​the concave cavity structure.

[0072] Specifically, the concave cavity structure is funnel-shaped. When hot air is injected into the ice layer through the first and second air holes 1051, 1052, the hot air diffuses radially outward along the sidewalls of the concave cavity structure, increasing the contact area between the hot air and the ice layer and improving ice melting efficiency. Once the ice layer within the concave cavity structure is completely melted, the unmelted outer ice layer, opposite the concave cavity structure, is suspended. This facilitates the expansion of the contoured airbag 2, allowing this suspended ice layer to separate from the surface of the blade body 1 under tension. Furthermore, during the aforementioned ice melting process, water from the melted ice layer can be collected by the concave cavity structure and converged into the first and second air holes 1051, 1052. Under negative pressure suction, it is collected in the water storage container 6, thereby improving water recovery efficiency.

[0073] In one embodiment, reference Figure 1 and Figure 2 The leading edge 103 is provided with a diverter air passage 1031, which extends from front to rear. The rear end of the diverter air passage 1031 is connected to the air storage bin of the air supply device 3 and / or passes through to the trailing edge 104;

[0074] The wind turbine blade assembly also includes a cover body 7, a filter screen 8 and a spray device 9. The cover body 7 is arranged on the leading edge 103 and covers the diverter air channel 1031. The filter screen 8 is arranged in the diverter air channel 1031. The spray device 9 is connected to the water storage container 6. When the cover body 7 is opened, the airflow at the leading edge 103 enters the diverter air channel 1031. The spray device 9 is used to use the water stored in the water storage container 6 to spray the filter screen 8 and / or the blade body 1.

[0075] In this embodiment, a diverter air channel 1031 is provided at the leading edge 103 of the blade body 1. The diverter air channel 1031 extends backward along the width direction of the blade body 1. When the airflow reaches the leading edge 103 of the blade body 1, before the airflow is diverted by the leading edge 103 to the suction surface 101 and the pressure surface 102, a portion of the airflow will first enter the diverter air channel 1031 and flow backward. The portion of the airflow that eventually enters the diverter air channel 1031 will be collected in the air storage bin of the air supply device 3 to replenish the air supply device 3, or directly flow outward from the trailing edge 104. This reduces the total airflow diverted to the suction surface 101 and the pressure surface 102, and can quickly reduce the lift of the blade body 1 and achieve rapid load reduction. This solution can work together with the load reduction operation of the second air hole 1052 and the contoured airbag 2 to further enhance the load reduction effect of the blade body 1.

[0076] Leading edge 103 is provided with a cover 7. Under normal wind conditions, cover 7 covers the diverter duct 1031, preventing airflow from entering diverter duct 1031 and reducing power generation efficiency. In extreme wind conditions, cover 7 can be opened to reduce the load on blade body 1. Diverter duct 1031 is provided with a filter 8 to remove impurities such as sand and dust from the airflow entering diverter duct 1031, preventing impurities from entering the blade body 1 and causing interference or damage to other components.

[0077] The spraying device 9 can be stored inside the blade body 1. The spraying device 9 can use the water stored in the water storage container 6 during the ice melting operation to regularly spray the filter 8 to remove impurities attached to the filter 8 and avoid clogging of the diversion air channel 1031; the spraying end of the spraying device 9 can also be extended to the outside of the blade body 1 through the corresponding water channel to regularly spray the outer surface of the blade body 1, so as to cooperate with the dust removal air holes 105 to achieve the cleaning of the surface of the blade body 1 and avoid impurities clogging the dust removal air holes 105.

[0078] In one embodiment, reference Figure 2 and Figure 3 The two docking positions between the first capsule 201 and the second capsule 202 are respectively a first joint portion 204 and a second joint portion 205, and the first joint portion 204 and the second joint portion 205 are arranged at intervals along the width direction of the blade body 1;

[0079] At least one first partitioning flap 206 is provided in the contoured airbag 2. One end of the first partitioning flap 206 is connected to the first joint portion 204, and the other end of the first partitioning flap 206 is connected to the second joint portion 205. The first partitioning flap 206 divides the inflatable chamber 203 into at least two first sub-chambers 2031. The at least two first sub-chambers 2031 are arranged along the thickness direction of the blade body 1.

[0080] The gas supply device 3 is used to supply gas to at least two first sub-chambers 2031 in sequence.

[0081] In this embodiment, the first sub-chamber 2031 is configured as Figure 3Taking the two shown as examples, air can first be supplied to the first first sub-chamber 2031 through the air supply device 3 to drive the second bladder 202 to move away from the first bladder 201, causing the contoured airbag 2 to initially expand. When the first first sub-chamber 2031 reaches its maximum inflation volume, air can be supplied to the second first sub-chamber 2031 through the air supply device 3 to drive the second bladder 202 to continue moving away from the first bladder 201. When the second first sub-chamber 2031 also reaches its maximum inflation volume, the contoured airbag 2 is in a fully expanded state, at which point the thickness of the contoured airbag 2 reaches its maximum (i.e., the distance between the second bladder 202 and the first bladder 201 reaches its maximum). Similarly, when the number of first sub-chambers 2031 is set to three or more, each first sub-chamber 2031 can also be inflated in sequence according to the above method, which will not be described in detail here. Based on the above-mentioned segmented inflation method, the contoured airbag 2 can be gradually inflated in segments.

[0082] In actual application, when it is necessary to melt ice through the expansion action of the contoured airbag 2 in conjunction with the hot air flow ejected from the dust removal air hole 105, due to the uncontrollable nature of the expansion speed of the contoured airbag 2, it is easy for the contoured airbag 2 to expand too fast and provide a tension exceeding the current requirement when the ice layer at other positions has not yet melted to the preset state and has not yet loosened. As a result, the ice layer on the surface of the contoured airbag 2 is directly broken by the rapidly increasing tension, while the ice layer at other positions cannot be smoothly separated from the blade body 1 under the drive of the contoured airbag 2. Based on this problem, this embodiment divides the inflation chamber 203 of the contoured airbag 2 into multiple first sub-chambers 2031 along the thickness direction, and adopts the above-mentioned segmented inflation method, which can effectively control the expansion speed of the contoured airbag 2, and ensure that the tension provided by the contoured airbag 2 during the expansion process can be adapted to the melting and loosening state of the ice layer, and can avoid the problem of part of the ice layer being broken due to excessive tension growth and the inability to separate the entire ice layer, and can improve the success rate of the ice layer being completely separated from the blade body 1 and the surface of the contoured airbag 2.

[0083] In addition, based on the solution of this embodiment, the shape of the contoured airbag 2 after expansion can be more flexibly controlled by inflating different first sub-chambers 2031, so that the aerodynamic shape of the entire wind turbine blade can be more accurately adjusted according to actual requirements, thereby improving adaptability.

[0084] In one embodiment, reference Figure 1 and Figure 2 The wind turbine blade assembly further includes a regulating module (not shown in the figure), which is electrically connected to the heating assembly 5 and the air supply device 3. The regulating module pre-stores a mapping relationship table between heating parameters and air supply parameters;

[0085] The adjustment module is used to obtain the real-time heating parameters of the heating component 5, and the adjustment module is used to call the real-time gas supply parameters corresponding to the real-time heating parameters from the mapping relationship table and send them to the gas supply device 3 to control the gas supply device 3 to supply gas to the corresponding first sub-chamber 2031 according to the real-time gas supply parameters.

[0086] Specifically, the regulation module can refer to a control module such as an MCU (Microcontroller Unit) that provides basic signal input and output, data storage and access, numerical calculation, and judgment functions. Heating parameters may include heating power and heating time, which can be used to characterize the melting state of the ice layer under the influence of the hot air flow. Air supply parameters may include air supply pressure, air supply time, and the timing of air supply to the first sub-chamber 2031. These parameters can be used to characterize the inflation speed of the contoured airbag 2.

[0087] Based on the above settings, the melting state of the ice layer can be correlated with the expansion speed of the contoured airbag 2, so that the current expansion speed of the contoured airbag 2 can be autonomously adjusted according to the current melting state of the ice layer, ensuring that the change in the tension provided by the contoured airbag 2 is compatible with the overall loosening of the ice layer. This autonomous control method further improves the success rate of the ice layer completely separating from the blade body 1 and the surface of the contoured airbag 2, thereby improving the automation and intelligence of the system while improving the ice melting effect.

[0088] In one embodiment, reference Figure 2 and Figure 3 At least one second partitioning flap 207 is provided in the contoured airbag 2. One end of the second partitioning flap 207 is connected to the first airbag body 201, and the other end of the second partitioning flap 207 is connected to the second airbag body 202. The second partitioning flap 207 divides the inflatable chamber 203 into at least two second sub-chambers 2032. The at least two second sub-chambers 2032 are arranged along the width direction of the blade body 1.

[0089] The gas supply device 3 is used to supply gas to at least two second sub-chambers 2032 in sequence.

[0090] In this embodiment, the first sub-chamber 2031 is configured as Figure 3Taking the two shown as examples, each first sub-chamber 2031 can be divided into two second sub-chambers 2032. In actual application, when the air supply device 3 supplies air to one of the second sub-chambers 2032, the portion of the contoured airbag 2 corresponding to that second sub-chamber 2032 can expand and bulge, while the portions of the contoured airbag 2 corresponding to the other second sub-chambers 2032 remain in their contracted state. This creates different tensions on the ice layer on the surface of the contoured airbag 2 at different locations along the width direction, causing the ice layer to loosen relative to the contoured airbag 2 due to the tension differences. The air supply device 3 can then sequentially supply air to the other second sub-chambers 2032, causing the other portions of the contoured airbag 2 to expand and bulge in turn. By creating tension differences at different locations on the contoured airbag 2 in this manner, the ice layer on the surface of the contoured airbag 2 can be more smoothly detached, to a certain extent preventing the ice layer from stubbornly adhering to the surface of the contoured airbag 2 and becoming unable to be separated.

[0091] In addition, based on the solution of this embodiment, the shape of the contoured airbag 2 after expansion can be more flexibly controlled by inflating different second sub-chambers 2032, so that the aerodynamic shape of the entire wind turbine blade can be more accurately adjusted according to actual requirements, thereby improving adaptability.

[0092] The present invention also provides a wind turbine generator set. Figures 1 to 3 The wind turbine generator set includes the wind turbine blade assembly in any of the above embodiments.

[0093] In this embodiment, the blade body 1 can convert wind energy into mechanical energy during rotation. The wind turbine generator set can use this mechanical energy to drive the rotor to rotate and generate electrical energy, which can eventually be output to the outside in the form of alternating current to achieve power generation.

[0094] For details on the specific structure of the wind turbine blade assembly, please refer to the description of the above-mentioned embodiments. Since the wind turbine generator set in this embodiment utilizes all of the technical solutions of all of the above-mentioned embodiments, it at least possesses all of the beneficial effects brought about by the technical solutions of the above-mentioned embodiments. Specifically, the air supply device 3 and the negative pressure device 4 can alternately supply air and perform negative pressure suction operations on the contoured airbag 2, while simultaneously supplying air to the dust removal holes 105 through the air supply device 3. The alternating expansion and contraction of the contoured airbag 2 generates vibrations, causing dust covering the surface of the blade body 1 to separate from the blade body 1 due to inertia, while the airflow ejected outward from the dust removal holes 105 can blow the separated dust away from the surface of the blade body 1. As can be seen, this solution, through the coordinated expansion and contraction of the contoured airbag 2 and the air jets from the dust removal holes 105, can automatically and efficiently remove dust from the surface of the blade body 1 without requiring downtime. This prevents some dust from stubbornly adhering to the blade body 1 and being difficult to remove solely through the air jets from the dust removal holes 105. This results in a more thorough dust removal effect, eliminating the need for manual dust removal and reducing the significant manpower and material costs associated with frequent dust removal operations. Furthermore, based on the deformable nature of the contoured airbag 2, this solution can flexibly alter the aerodynamic shape of the blade body 1 according to actual needs, enabling rapid load reduction of the blade body 1 under extreme wind conditions. This prevents structural damage caused by overloaded operation of the blade body 1 at high wind speeds, thereby improving the operational safety and environmental adaptability of wind turbine blades and extending their service life.

[0095] It should be noted that other contents of the wind turbine blade assembly and wind turbine generator set disclosed in the present invention can be found in the prior art and will not be described in detail here.

[0096] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A wind turbine blade assembly, characterized in that: The wind turbine blade assembly comprises: A blade body, the blade body having a suction surface and a pressure surface arranged opposite to each other in the thickness direction, and the blade body having a leading edge and a trailing edge arranged opposite to each other in the width direction; the suction surface and / or the pressure surface are provided with a plurality of dust removal holes arranged in an array; the pressure surface is provided with a recessed portion on a side near the trailing edge; A contoured airbag, comprising a first bladder body and a second bladder body, wherein the first bladder body is attached to the surface of the recessed portion, and the second bladder body is located on a side of the first bladder body facing away from the recessed portion, and the first bladder body and the second bladder body enclose a gas-filled chamber; an air supply device, the air supply device being in communication with the dust removal air hole and the inflation chamber; the air supply device being used to supply air to the dust removal air hole so that the airflow ejected outward through the dust removal air hole blows away the dust on the surface of the blade body; and the air supply device being used to supply air to the inflation chamber so as to inflate the contoured airbag, thereby driving the second bag body away from the first bag body; A negative pressure device is used to perform a negative pressure suction operation on the inflation chamber to shrink the contoured airbag, thereby driving the second bag to approach the first bag.

2. The wind turbine blade assembly according to claim 1, characterized in that: The wind turbine blade assembly also includes a heating assembly, which is arranged on the air path between the air supply device and the dust removal air hole; the heating assembly is used to increase the temperature of the air flow ejected outward from the dust removal air hole through heating operation to melt the ice layer on the surface of the blade body.

3. The wind turbine blade assembly according to claim 2, characterized in that: The dust removal air holes include a plurality of first air holes and a plurality of second air holes, and the plurality of first air holes and the plurality of second air holes are arranged in a space between each other on the suction surface; the air outlet direction of the first air holes forms a first angle with the suction surface, the first angle is 5° to 10°, and the air outlet direction of the first air holes is arranged backward; the air outlet direction of the second air holes is perpendicular to the suction surface; When the air supply device supplies air to the first air hole, the gas flow rate of the suction surface increases, thereby increasing the lift of the blade body; when the air supply device supplies air to the second air hole, the gas flow rate of the suction surface decreases, thereby reducing the lift of the blade body.

4. The wind turbine blade assembly according to claim 3, characterized in that: The wind turbine blade assembly further includes a water storage container, wherein the water storage container and the negative pressure device are in communication with the first air hole and the second air hole; In the case where the air supply device supplies air to the first air hole, when the heating component performs a heating operation, the negative pressure device is used to perform a negative pressure suction operation on the second air hole, so as to suck the water formed by the melting of the ice layer on the suction surface into the water storage container through the second air hole; In the case where the air supply device supplies air to the second air hole, when the heating component performs a heating operation, the negative pressure device is used to perform a negative pressure suction operation on the first air hole, so as to suck the water body formed after the ice layer on the suction surface melts into the water storage container through the first air hole.

5. The wind turbine blade assembly according to claim 4, characterized in that: The suction surface is provided with a plurality of concave cavity structures, and the cross-sectional area of ​​the concave cavity structures gradually decreases from the outside to the inside; the plurality of first air holes and the plurality of second air holes are arranged in a one-to-one correspondence within the coverage area of ​​the concave cavity structures.

6. The wind turbine blade assembly according to claim 4, characterized in that: The front edge is provided with a diverter air passage, the diverter air passage extends from front to rear, the rear end of the diverter air passage is connected to the air storage bin of the air supply device and / or passes through to the rear edge; The wind turbine blade assembly further includes a cover, a filter, and a spray device. The cover is disposed on the leading edge and covers the diverter air passage. The filter is disposed in the diverter air passage. The spray device is connected to the water storage container. When the cover is opened, the airflow from the leading edge enters the diverter air passage. The spraying device is used to utilize the water stored in the water storage container to spray the filter screen and / or the blade body.

7. The wind turbine blade assembly according to claim 4, characterized in that: The two docking positions between the first bladder and the second bladder are respectively a first joint portion and a second joint portion, and the first joint portion and the second joint portion are arranged at intervals along the width direction of the blade body; At least one first partitioning flap is provided in the contoured airbag, one end of the first partitioning flap is connected to the first joint portion, and the other end of the first partitioning flap is connected to the second joint portion; the first partitioning flap divides the inflation chamber into at least two first sub-chambers, and the at least two first sub-chambers are arranged along the thickness direction of the blade body; The gas supply device is used to supply gas to at least two of the first sub-chambers in sequence.

8. The wind turbine blade assembly according to claim 7, characterized in that: The wind turbine blade assembly further comprises a regulating module, the regulating module being electrically connected to the heating assembly and the air supply device, and the regulating module pre-stores a mapping relationship table between heating parameters and air supply parameters; The adjustment module is used to obtain the real-time heating parameters of the heating component, and the adjustment module is used to call the real-time gas supply parameters corresponding to the real-time heating parameters from the mapping relationship table and send them to the gas supply device to control the gas supply device to supply gas to the corresponding first sub-chamber according to the real-time gas supply parameters.

9. The wind turbine blade assembly according to any one of claims 1 to 8, characterized in that: At least one second partitioning flap is provided in the contoured airbag, one end of the second partitioning flap is connected to the first airbag body, and the other end of the second partitioning flap is connected to the second airbag body; the second partitioning flap divides the inflation chamber into at least two second sub-chambers, and the at least two second sub-chambers are arranged along the width direction of the blade body; The gas supply device is used to supply gas to at least two of the second sub-chambers in sequence.

10. A wind turbine generator set, characterized in that: The wind turbine generator set comprises the wind turbine blade assembly according to any one of claims 1 to 9.

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