Wind turbine blade components and wind turbine generator sets

Abstract

This invention discloses a wind turbine blade assembly and a wind turbine generator set, relating to the field of wind power generation technology. The assembly includes a blade body, a filter, a cover, and an air supply device. The blade body has a suction surface and a pressure surface arranged opposite each other along its thickness direction, and a leading edge and a trailing edge arranged opposite each other along its width direction. The suction surface has multiple turbulence-inducing air holes, with the air outlet direction of the turbulence-inducing air holes perpendicular to the suction surface. The leading edge has a diversion air channel that extends from front to rear to the trailing edge. The filter is disposed in the diversion air channel. The cover is disposed at the leading edge and seals the diversion air channel. When the cover is opened, the airflow at the leading edge enters the diversion air channel. The air storage chamber of the air supply device is connected to the diversion air channel. The air supply device supplies air to the turbulence-inducing air holes to blow away sand and dust from the surface of the blade body through the airflow ejected outwards from the turbulence-inducing air holes, while simultaneously reducing the gas velocity on the suction surface, thereby reducing the lift of the blade body. This solution can address the technical problem of wind turbine blades being easily damaged by overload under extreme wind conditions.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a wind turbine blade assembly and a wind turbine generator set. Background Technology

[0002] In the field of wind power generation, wind turbine blades, as the core component of wind turbines, have a crucial impact on power generation efficiency and equipment lifespan. In areas with strong winds and harsh environments, such as the Gobi Desert, the application of large-scale wind turbine units is increasing. Although these areas have abundant wind energy resources, they often experience extreme wind conditions with extremely high speeds, posing a severe challenge to the normal operation of wind turbine blades.

[0003] Under extreme wind conditions, the load on wind turbine blades increases significantly, potentially causing them to rotate too quickly. When the load exceeds the blade's structural strength limit, it can lead to twisting, deformation, or even breakage, posing significant safety hazards. These problems severely restrict the power generation efficiency of wind turbine generators and can cause prolonged equipment downtime due to blade damage, greatly increasing maintenance and replacement costs. Therefore, effectively ensuring the structural stability of wind turbine blades under extreme wind conditions has become crucial for improving the reliability of wind power generation systems. Summary of the Invention

[0004] The main objective of this invention is to propose a wind turbine blade assembly, which aims to solve the technical problem that wind turbine blades are prone to overload damage under extreme wind conditions.

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

[0006] The blade body has a suction surface and a pressure surface arranged opposite each other along the thickness direction, and a leading edge and a trailing edge arranged opposite each other along the width direction; the suction surface is provided with a plurality of arrayed turbulence holes, the outlet direction of the turbulence holes is perpendicular to the suction surface; the leading edge is provided with a diversion channel, the diversion channel extends from front to rear to the trailing edge;

[0007] A filter screen is disposed in the split air passage;

[0008] A cover is disposed at the leading edge and seals the diversion air passage; when the cover is opened, the airflow at the leading edge enters the diversion air passage;

[0009] An air supply device is provided, wherein the air storage chamber of the air supply device is connected to the diversion air channel; the air supply device is used to supply air to the turbulence air hole so that the airflow ejected outward through the turbulence air hole blows away the sand and dust on the surface of the blade body, while reducing the gas flow velocity on the suction surface, thereby reducing the lift of the blade body.

[0010] In one embodiment, the diversion airway is configured as a spiral structure, and the turbulence vent is connected to the outer peripheral side of the diversion airway.

[0011] In one embodiment, the wind turbine blade assembly further includes a wind speed sensor and a drive module, the drive module being connected to the wind speed sensor and the cover; the wind speed sensor is used to output a load reduction signal to the drive module when the measured ambient wind speed is greater than a critical wind speed threshold, and the drive module is used to drive the cover to open when it receives the load reduction signal.

[0012] In one embodiment, a throttling block is detachably connected between the rear end of the split airway and the rear edge. The throttling block is provided with a throttling orifice. The front end of the throttling orifice is connected to the rear end of the split airway, and the rear end of the throttling orifice is connected to the rear edge. The cross-sectional area of ​​the throttling orifice is smaller than the cross-sectional area of ​​the split airway.

[0013] In one embodiment, the wind turbine blade assembly further includes a semiconductor thermoelectric generator, which is attached to the outer wall of the air duct of the split air duct and the outer wall of the throttling block. The semiconductor thermoelectric generator is electrically connected to the air supply device, the wind speed sensor, and the drive module.

[0014] The semiconductor thermoelectric generator is used to convert the internal energy generated by the friction between the airflow and the inner wall of the airflow channel and the wall of the throttling orifice into electrical energy, so as to supply power to at least one of the air supply device, the wind speed sensor and the drive module.

[0015] In one embodiment, the wind turbine blade assembly further includes a heat insulation layer that covers the outer wall of the air duct of the split air duct and the outer wall of the throttling block, and the semiconductor thermoelectric generator is located within the coverage area of ​​the heat insulation layer.

[0016] In one embodiment, the wind turbine blade assembly further includes a heating assembly disposed in the air passage between the air supply device and the turbulence vent; the heating assembly is used to increase the temperature of the airflow ejected outward from the turbulence vent through heating operation, so as to melt the ice layer on the surface of the blade body.

[0017] In one embodiment, the suction surface is provided with a plurality of arrayed storage holes; the wind turbine blade assembly further includes a water storage container and a negative pressure device, the water storage container and the negative pressure device being connected to the storage holes;

[0018] When the gas supply device supplies gas to the turbulence vent, and the heating component performs a heating operation, the negative pressure device is used to perform a negative pressure suction operation on the storage vent, so as to draw the water formed after the ice layer on the suction surface melts through the storage vent into the water storage container.

[0019] In one embodiment, the wind turbine blade assembly further includes a spraying device connected to the water storage container; the spraying device is used to spray the filter screen and / or the blade body with water stored in the water storage container.

[0020] In one embodiment, the pressure surface has a recess on the side near the trailing edge; the wind turbine blade assembly also includes a conforming airbag, the conforming airbag includes a first airbag body and a second airbag body, the first airbag body is attached to the surface of the recess, the second airbag body is located on the side of the first airbag body opposite to the recess, the first airbag body and the second airbag body enclose to form an inflation chamber, the inflation chamber is connected to the air supply device;

[0021] The air supply device is used to supply air to the inflation chamber so that the conformal airbag inflates and expands, thereby moving the second bladder away from the first bladder.

[0022] The present invention also proposes a wind turbine generator set, which includes the wind turbine blade assembly as described above.

[0023] The wind turbine blade assembly provided by this invention, on the one hand, supplies air to the turbulence vents through an air supply device. The airflow ejected outward from the turbulence vents can change the flow field near the blade body, reducing the air pressure difference between the suction surface and the pressure surface, thus reducing the lift required by the blade body. On the other hand, the diversion effect of the diversion channel reduces the total airflow diverted from the leading edge to the suction and pressure surfaces, and uses the airflow entering the diversion channel to replenish the air supply device, so that the air supply device can continuously supply air to the turbulence vents. Based on the above-mentioned synergistic effect of the turbulence vents and the diversion channel, the blade body can be rapidly unloaded, avoiding overload operation of the blade body at high wind speeds and structural damage. This is beneficial to improving the structural stability, operational safety and environmental adaptability of the wind turbine blade, extending the service life of the wind turbine blade, and reducing losses caused by long-term equipment downtime for maintenance. In addition, the airflow ejected outward from the turbulence vents can also be used to blow away sand and dust impurities from the surface of the blade body, preventing sand and dust accumulation, thus eliminating the need for manual dust removal operations and reducing the large amount of manpower and material costs incurred due to frequent dust removal operations. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of the conformal airbag in the wind turbine blade assembly provided by the present invention when it is in a contracted state;

[0026] Figure 2 This is a schematic diagram of the structure of the conformal airbag in the wind turbine blade assembly provided by the present invention when it is in an inflated state.

[0027] Explanation of icon numbers:

[0028] 1. Blade body; 101. Suction surface; 102. Pressure surface; 103. Leading edge; 104. Trailing edge; 1011. Turbulence vent; 1012. Accumulation vent; 1021. Recess; 1031. Diverter channel;

[0029] 2. Filter screen; 3. Cover; 4. Air supply device; 5. Wind speed sensor;

[0030] 6. Throttling block; 601. Throttling orifice;

[0031] 7. Semiconductor thermoelectric generator; 8. Heat insulation layer; 9. Heating component; 10. Water storage container; 11. Negative pressure device; 12. Spraying device;

[0032] 13. Contouring airbag; 1301. First airbag body; 1302. Second airbag body; 1303. Inflatable chamber.

[0033] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] 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 positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0036] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0037] In the field of wind power generation, wind turbine blades, as the core component of wind turbines, have a crucial impact on power generation efficiency and equipment lifespan. In areas with strong winds and harsh environments, such as the Gobi Desert, the application of large-scale wind turbine units is increasing. Although these areas have abundant wind energy resources, they often experience extreme wind conditions with extremely high speeds, posing a severe challenge to the normal operation of wind turbine blades.

[0038] Under extreme wind conditions, the load on wind turbine blades increases significantly, potentially causing them to rotate too quickly. When the load exceeds the blade's structural strength limit, it can lead to twisting, deformation, or even breakage, posing significant safety hazards. These problems severely restrict the power generation efficiency of wind turbine generators and can cause prolonged equipment downtime due to blade damage, greatly increasing maintenance and replacement costs. Therefore, effectively ensuring the structural stability of wind turbine blades under extreme wind conditions has become crucial for improving the reliability of wind power generation systems.

[0039] To address the aforementioned problems, this invention provides a wind turbine blade assembly. Turbulence vents are provided on the blade body to alter the flow field in the vicinity of the blade body via airflow injected through these vents. Furthermore, a diversion channel is provided on the blade body to reduce the total airflow diverted to the suction and pressure surfaces. This allows for rapid reduction of the blade body's lift, enabling rapid load reduction and preventing structural damage caused by overload operation of the blade body under extreme wind conditions.

[0040] Please see Figure 1The wind turbine blade assembly provided by the present invention includes:

[0041] The blade body 1 has a suction surface 101 and a pressure surface 102 arranged opposite to each other along the thickness direction, and a leading edge 103 and a trailing edge 104 arranged opposite to each other along the width direction; the suction surface 101 is provided with a plurality of arrayed turbulence vents 1011, and the outlet direction of the turbulence vents 1011 is perpendicular to the suction surface 101; the leading edge 103 is provided with a diversion channel 1031, which extends from front to rear to the trailing edge 104;

[0042] Filter 2 is installed in the split air passage 1031;

[0043] Cover 3 is disposed at the leading edge 103 and seals the diversion air passage 1031; when cover 3 is opened, the airflow at the leading edge 103 enters the diversion air passage 1031.

[0044] The air supply device 4 has an air storage chamber connected to the diversion air passage 1031. The air supply device 4 is used to supply air to the turbulence air hole 1011 so that the airflow ejected outward through the turbulence air hole 1011 blows away the sand and dust on the surface of the blade body 1, while reducing the gas flow velocity on the suction surface 101, thereby reducing the lift of the blade body 1.

[0045] 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 the leading edge 103, and the other side of the suction surface 101 and the other side of the pressure surface 102 are connected at the trailing edge 104. The blade body 1 is a structural component 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.

[0046] When wind blows along the width of the blade body 1, the airflow is split 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. This pressure difference can provide lift for the blade body 1. The lift direction 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 the power generation.

[0047] The turbulence vent 1011 can be configured as a microporous structure; the outlet direction of the turbulence vent 1011 is perpendicular to the suction surface 101, meaning that the axis of the turbulence vent 1011 is perpendicular to the tangent plane of the suction surface 101 at the turbulence vent 1011 (or the axis of the turbulence vent 1011 is parallel to the normal of the suction surface 101 at the turbulence vent 1011); thus, the direction of the airflow ejected outward from the turbulence vent 1011 is approximately equal to the flow direction of the external airflow on the surface of the suction surface 101. In a mutually perpendicular state, that is, the airflow ejected outward from the turbulence vent 1011 can obstruct the external airflow flowing on the surface of the suction surface 101, thereby slowing down the airflow velocity on the surface of the suction surface 101 and increasing the air pressure at the suction surface 101. With the air pressure at the pressure surface 102 remaining unchanged, the air pressure difference between the suction surface 101 and the pressure surface 102 will decrease, thereby reducing the lift required to be borne by the blade body 1, thus achieving load reduction of the blade body 1 under extreme wind conditions.

[0048] Furthermore, in areas with strong winds and harsh environments such as the Gobi Desert, the air contains high levels of dust. During the operation of wind power equipment, dust particles continuously impact and adhere to the surface of the blade body 1, causing dust to easily accumulate on the surface. This dust accumulation significantly affects the aerodynamic performance of the blade body 1, altering its aerodynamic shape, increasing its surface roughness, and potentially reducing power generation efficiency. Simultaneously, abrasive particles in the dust continuously wear down the blade body 1, which, in the long term, affects its structural integrity and service life. To address this issue, the airflow ejected from the turbulence vents 1011 in this embodiment can also simultaneously blow away dust impurities from the surface of the blade body 1, preventing dust accumulation and eliminating the need for manual dust removal operations, thus reducing the significant manpower and material costs associated with frequent dust removal work.

[0049] The air supply device 4 may include an air storage chamber and an air pump, which can pump the gas in the air storage chamber to the outside. The air supply device 4 can be housed inside the blade body 1. The air supply device 4 can be connected to the turbulence vent 1011 through a corresponding valve structure. By controlling the opening and closing of the valve structure, the air supply device 4 can supply air to the turbulence vent 1011 according to the actual usage requirements.

[0050] The diversion channel 1031 extends rearward 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 to the suction surface 101 and the pressure surface 102 by the leading edge 103, a portion of the airflow will first enter the diversion channel 1031 and flow rearward. This portion of the airflow that finally enters the diversion channel 1031 can be collected in the gas storage chamber of the gas supply device 4, thereby replenishing the gas supply device 4 and enabling the gas supply device 4 to continuously supply gas to the turbulence orifice 1011. This portion of the airflow can also flow outward directly from the trailing edge 104. Based on the diversion effect of the diversion channel 1031, the total airflow diverted to the suction surface 101 and the pressure surface 102 can be reduced, thus also achieving load reduction of the blade body 1.

[0051] The leading edge 103 is equipped with a cover 3. Under normal wind conditions, the cover 3 closes onto the split air passage 1031 to prevent airflow from entering the split air passage 1031 and reducing power generation efficiency. In the event of extreme wind conditions, the cover 3 can be opened to reduce the load on the blade body 1. A filter 2 is installed in the split air passage 1031 to filter out impurities such as sand and dust in the airflow entering the split air passage 1031, preventing impurities from entering the blade body 1 and causing interference and damage to other components.

[0052] Based on the above configuration, the blade body 1 can be rapidly unloaded through the combined action of the turbulence hole and the diversion air passage 1031, avoiding overload operation of the blade body 1 under high wind speeds and structural damage. This is beneficial to improving the structural stability, operational safety and environmental adaptability of the wind turbine blade, extending the service life of the wind turbine blade, and reducing losses caused by long-term equipment downtime for maintenance.

[0053] In one embodiment, refer to Figure 1 The diversion airway 1031 is configured with a spiral structure, and the turbulence vent 1011 is connected to the outer peripheral side of the diversion airway 1031.

[0054] Specifically, the spiral central axis of the split air passage 1031 is set along the width direction of the blade body 1. When the split air passage 1031 is set as a spiral structure, the airflow at the leading edge 103 enters the split air passage 1031 and flows backward along the spiral path. This increases the contact area between the airflow and the inner wall of the split air passage 1031 and increases the friction between them. Thus, the kinetic energy of the airflow can be converted into internal energy through this friction, thereby consuming the energy of the airflow and preventing the airflow from damaging the air supply device 4 and other devices at the rear end after passing through the split air passage 1031 with a large kinetic energy. Furthermore, the internal energy generated by the friction can be collected by a corresponding energy conversion device and used by other devices in the future. This reduces the waste of wind energy while achieving load reduction and improves the energy utilization rate.

[0055] Furthermore, as the airflow flows along a spiral path, it will converge towards the outer periphery of the split air passage 1031 under centrifugal force. By connecting the turbulence orifice 1011 to the outer periphery of the split air passage 1031, the airflow that converges towards the outer periphery of the split air passage 1031 under centrifugal force can be ejected outward from the turbulence orifice 1011 with a certain kinetic energy, thereby reducing the air pressure on the suction surface 101 and reducing the lift of the blade body 1. This can be combined with the split air passage 1031 to achieve further load reduction of the blade body 1. Based on the above configuration, part of the airflow entering the split air passage 1031 can be directly used for gas injection into the turbulence orifice 1011 without having to supply gas to the turbulence orifice 1011 through the gas supply device 4 after entering the gas storage chamber. That is, the jetting operation of the turbulence orifice 1011 can be completed based on the kinetic energy of the airflow itself without relying entirely on the gas supply device 4. This improves the response speed and load reduction efficiency, and reduces energy consumption.

[0056] In one embodiment, refer to Figure 1 The wind turbine blade assembly also includes a wind speed sensor 5 and a drive module (not shown in the figure). The drive module is connected to the wind speed sensor 5 and the cover 3. The wind speed sensor 5 is used to output a load reduction signal to the drive module when the measured ambient wind speed is greater than the critical wind speed threshold. The drive module is used to drive the cover 3 to open when it receives the load reduction signal.

[0057] Specifically, the wind speed sensor 5 can be connected to the drive module via a main control module such as an MCU (Microcontroller Unit). Parameters such as the critical wind speed threshold can be stored in the main control module. The wind speed sensor 5 is used to send the detected current ambient wind speed to the main control module. When the main control module finds that the ambient wind speed is greater than the critical wind speed threshold through numerical comparison, it can determine that extreme wind conditions have occurred. Then, based on a preset program, it sends a load reduction signal to the drive module to trigger the drive module to promptly open the cover 3, so that the airflow at the leading edge 103 is diverted to the diversion channel 1031, thereby achieving rapid load reduction of the blade body 1. The drive module may include drive devices such as motors and drive chips that interact with the main control module.

[0058] Based on the above settings, when faced with extreme wind conditions, the load reduction operation can be carried out automatically without human intervention, realizing the rapid response of the system, minimizing the damage caused to the blade body 1 by extreme wind conditions, and improving the automation and intelligence of the wind power equipment.

[0059] In one embodiment, refer to Figure 1A throttling block 6 is detachably connected between the rear end of the split air passage 1031 and the rear edge 104. The throttling block 6 is provided with a throttling orifice 601. The front end of the throttling orifice 601 is connected to the rear end of the split air passage 1031, and the rear end of the throttling orifice 601 is connected to the rear edge 104. The cross-sectional area of ​​the throttling orifice 601 is smaller than the cross-sectional area of ​​the split air passage 1031.

[0060] When the airflow in the split air passage 1031 enters the throttling orifice 601 during its backward flow, the airflow will encounter greater resistance due to the narrowing of the air passage (i.e., the cross-sectional area of ​​the throttling orifice 601 is smaller than that of the split air passage 1031). Frequent collisions and friction will occur between the airflow and the orifice wall of the throttling orifice 601. This obstruction and friction will further convert the kinetic energy of the gas molecules into internal energy, thereby reducing the vibration generated by the airflow inside the blade body 1. Combined with the spiral structure of the split air passage 1031, this will further consume the energy of the airflow and obtain more internal energy to power other devices, thereby improving the utilization rate of wind energy while achieving load reduction.

[0061] Since the throttle block 6 adopts a detachable connection method, if the size of the throttle passage 601 is not suitable, only the throttle block 6 needs to be replaced, thereby improving applicability.

[0062] In one embodiment, refer to Figure 1 The wind turbine blade assembly also includes a semiconductor thermoelectric generator 7, which is attached to the outer wall of the air duct 1031 and the outer wall of the throttling block 6. The semiconductor thermoelectric generator 7 is electrically connected to the air supply device 4, the wind speed sensor 5, and the drive module.

[0063] The semiconductor thermoelectric generator 7 is used to convert the internal energy generated by the friction between the airflow and the inner wall of the airway of the diversion airway 1031 and the wall of the throttling orifice 601 into electrical energy, so as to power at least one of the air supply device 4, the wind speed sensor 5, and the drive module.

[0064] Specifically, the semiconductor thermoelectric generator 7 is typically composed of two different semiconductor materials (such as N-type semiconductor and P-type semiconductor), which are connected by a metal conductor to form a thermocouple. When one end of the semiconductor thermoelectric generator 7 is heated (usually called the hot end) and the other end is kept at a lower temperature (usually called the cold end), electrons will move from the hot end to the cold end due to the thermoelectric effect, thereby generating a potential difference between the hot end and the cold end. When an external circuit is connected to the semiconductor thermoelectric generator 7, electrons will flow through the external circuit to supply power to the external load.

[0065] Based on the above principle, the hot end of the semiconductor thermoelectric generator 7 can be placed near the outer wall of the airway 1031 and the outer wall of the throttling block 6, while the cold end of the semiconductor thermoelectric generator 7 can be placed in a position with a lower temperature inside the blade body 1. In this way, the internal energy generated by the airflow friction at the airway 1031 and the throttling orifice 601 can be converted into electrical energy, and the converted electrical energy can be used to power other devices, thereby realizing the recovery and utilization of energy.

[0066] In one embodiment, refer to Figure 1 The wind turbine blade assembly also includes a heat insulation layer 8, which covers the outer wall of the air duct 1031 and the outer wall of the throttling block 6. The semiconductor thermoelectric generator 7 is located within the coverage area of ​​the heat insulation layer 8.

[0067] The heat insulation layer 8 can be made of any heat insulation material, and is not limited here. By setting the heat insulation layer 8, the internal energy generated by airflow friction at the split air passage 1031 and the throttling orifice 601 can be sealed in a relatively closed area, reducing heat loss and ensuring the utilization rate of this portion of internal energy by the thermoelectric generator 7. Preferably, the hot end of the thermoelectric generator 7 is located within the coverage area of ​​the heat insulation layer 8, and the cold end of the thermoelectric generator 7 is located outside the coverage area of ​​the heat insulation layer 8, so that there is a sufficient temperature difference between the hot end and the cold end of the thermoelectric generator 7, thereby improving the conversion rate of internal energy into electrical energy.

[0068] In one embodiment, refer to Figure 1 The wind turbine blade assembly also includes a heating assembly 9, which is disposed in the air passage between the air supply device 4 and the turbulence vent 1011. The heating assembly 9 is used to increase the temperature of the airflow ejected outward from the turbulence vent 1011 through heating operation, so as to melt the ice layer on the surface of the blade body 1.

[0069] In environments with large temperature differences, such as the Gobi Desert and plateaus, especially when exposed to cold air, the surface of the blade body 1 is prone to frost or ice formation. This can damage the aerodynamic shape of the blade body 1, reduce power generation efficiency, and easily cause vibration, uneven load, and other problems, affecting equipment safety. To address this issue, this embodiment includes a heating component 9. When the air supply device 4 supplies air to the turbulence vent 1011, if frost or ice forms on the surface of the blade body 1, the heating component 9 can be activated. The gas will be heated as it passes through the heating component 9, causing the turbulence vent 1011 to eject a high-temperature hot airflow, which can melt the ice layer on the blade surface. The heating component 9 can be electrically heated and housed inside the blade body 1; the electrical energy converted by the semiconductor thermoelectric generator 7 in the above embodiment can also be used to power the heating component 9.

[0070] Based on the above settings, the function of the turbulence vent 1011 can be further expanded, so that the turbulence vent 1011 can not only remove sand and dust and change the flow field, but also achieve ice melting operation.

[0071] In one embodiment, refer to Figure 1 The suction surface 101 is provided with multiple arrayed storage holes 1012; the wind turbine blade assembly also includes a water storage container 10 and a negative pressure device 11, and the water storage container 10, the negative pressure device 11 and the storage holes 1012 are connected.

[0072] When the air supply device 4 supplies air to the turbulence air hole 1011, when the heating component 9 is performing heating operation, the negative pressure device 11 is used to perform negative pressure suction operation on the storage hole 1012, so as to draw the water formed after the ice layer of the suction surface 101 melts through the storage hole 1012 into the water storage container 10.

[0073] Specifically, the water storage container 10 and the negative pressure device 11 can be housed inside the blade body 1; the negative pressure device 11 is connected to the flow storage hole 1012 through a corresponding air passage inside the blade body 1, and the water storage container 10 can be set in the middle of the air passage; the negative pressure device 11 can be a pump with a negative pressure suction function.

[0074] Based on the above considerations, when ice melting is required, air is supplied to the turbulence vent 1011 through the air supply device 4 to melt the ice layer on the suction surface 101. Then, the negative pressure device 11 performs a negative pressure suction operation on the storage hole 1012, so that the water after the ice layer melts enters the storage hole 1012 under the action of negative pressure. This part of the water will be collected by the water storage container 10 when it flows through the air passage between the storage hole 1012 and the negative pressure device 11. In this way, the recovery of the water after ice melting is completed, and the water stored in the water storage container 10 can be used for cleaning, heat dissipation and cooling operations.

[0075] In the above embodiment, the electrical energy obtained by the semiconductor thermoelectric generator 7 can also be used to power the negative pressure device 11.

[0076] Based on the solution of this embodiment, the water 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, which would affect its normal operation. On the other hand, it can maximize the utilization of water resources in harsh environments with water shortage.

[0077] In one embodiment, refer to Figure 1 The wind turbine blade assembly also includes a spray device 12, which is connected to a water storage container 10. The spray device 12 is used to spray the filter screen 2 and / or the blade body 1 with the water stored in the water storage container 10.

[0078] The spray device 12 can be housed inside the blade body 1. The spray device 12 can use the water stored in the water storage container 10 during the ice melting operation to periodically spray the filter screen 2 to remove impurities attached to the filter screen 2 and prevent the diversion air passage 1031 from being blocked. The spray end of the spray device 12 can also be extended to the outside of the blade body 1 through a corresponding water passage to periodically spray the outer surface of the blade body 1, so as to work with the turbulence air hole 1011 to clean the surface of the blade body 1, while preventing impurities from blocking the turbulence air hole 1011.

[0079] In the above embodiment, the electrical energy obtained by the semiconductor thermoelectric generator 7 can also be used to power the spray device 12.

[0080] In one embodiment, refer to Figure 1 and Figure 2 The pressure surface 102 has a recess 1021 on the side near the rear edge 104; the wind turbine blade assembly also includes a contoured airbag 13, which includes a first airbag 1301 and a second airbag 1302. The first airbag 1301 is attached to the surface of the recess 1021, and the second airbag 1302 is located on the side of the first airbag 1301 facing away from the recess 1021. The first airbag 1301 and the second airbag 1302 enclose an inflation chamber 1303, which is connected to the air supply device 4.

[0081] The air supply device 4 is used to supply air to the inflation chamber 1303 so that the conformal airbag 13 inflates and expands, thereby moving the second bladder 1302 away from the first bladder 1301.

[0082] Specifically, the conformal airbag 13 should be made of elastic material. Under normal operating conditions of the wind power equipment, the conformal airbag 13 is in a fully contracted state, with the first airbag 1301 and the second airbag 1302 tightly fitted to the pressure surface 102. At this time, the first airbag 1301 and the second airbag 1302 do not affect the aerodynamic shape of the blade body 1 itself. However, when facing extreme wind conditions with extremely high wind speeds, air can be supplied to the inflation chamber 1303 through the air supply device 4, causing the conformal airbag 13 to inflate and move the second airbag 1302 away from the first airbag 1301. At this time, the second airbag 1302 will change the contour of the pressure surface 102, thereby increasing the airflow velocity on the pressure surface 102. Based on Bernoulli's principle, with the airflow velocity on the suction surface 101 remaining constant, 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.

[0083] Therefore, based on the deformation characteristics of the conformal airbag 13, this embodiment can flexibly change the aerodynamic shape of the blade body 1 according to actual needs. In this way, it can work in conjunction with the diversion air duct 1031 and the turbulence vent 1011 under extreme wind conditions to further reduce the lift required by the blade body 1, thereby further improving the load reduction effect of the blade body 1, avoiding overload operation of the blade body 1 under high wind speeds and causing structural damage. This is conducive to further improving the operational safety and environmental adaptability of the wind turbine blade, and extending the service life of the wind turbine blade.

[0084] This invention also provides a wind turbine generator set; please refer to [link / reference]. Figure 1 and Figure 2 The wind turbine generator set includes the wind turbine blade assembly in any of the above embodiments.

[0085] In this embodiment, the blade body 1 can convert wind energy into mechanical energy during rotation. The wind turbine generator can use this mechanical energy to drive the rotor to rotate and generate electrical energy, which can ultimately be output to the outside in the form of alternating current to achieve power generation.

[0086] For the specific structure of the wind turbine blade assembly, please refer to the description of the above embodiments. Since the wind turbine generator set in this embodiment adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments. Specifically, on the one hand, air is supplied to the turbulence vent 1011 through the air supply device 4. The airflow ejected outward from the turbulence vent 1011 can change the flow field near the blade body 1, reducing the pressure difference between the suction surface 101 and the pressure surface 102, thus reducing the lift required to be borne by the blade body 1. On the other hand, the diversion effect of the diversion channel 1031 reduces the flow diverted from the leading edge 103 to the suction surface 101 and the pressure surface 102. The total airflow of the force surface 102 is used to replenish the air supply device 4 with the airflow entering the diversion air passage 1031, so that the air supply device 4 can continuously supply air to the turbulence vent 1011. Based on the above-mentioned synergistic effect of the turbulence vent and the diversion air passage 1031, the blade body 1 can be rapidly unloaded, avoiding overload operation of the blade body 1 under high wind speeds and structural damage. This is beneficial to improving the structural stability, operational safety and environmental adaptability of the wind turbine blade, extending the service life of the wind turbine blade, and reducing losses caused by long-term equipment downtime for maintenance. In addition, the airflow ejected outward from the turbulence vent 1011 can also be used to blow away sand and dust impurities on the surface of the blade body 1, preventing sand and dust accumulation, thereby eliminating the need for manual dust removal operations and reducing the large amount of manpower and material costs consumed by frequent dust removal operations.

[0087] It should be noted that other contents of the wind turbine blade assembly and wind turbine generator set disclosed in this invention can be found in the prior art, and will not be repeated here.

[0088] 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 transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A wind turbine blade assembly, characterized in that, The wind turbine blade assembly includes: The blade body has a suction surface and a pressure surface arranged opposite each other along the thickness direction, and a leading edge and a trailing edge arranged opposite each other along the width direction. The suction surface is provided with a plurality of arrayed turbulence holes, the outlet direction of the turbulence holes being perpendicular to the suction surface. The leading edge is provided with a diversion channel, which extends from front to rear to the trailing edge. The diversion channel is configured with a spiral structure, and the turbulence holes are connected to the outer periphery of the diversion channel. A throttling block is detachably connected between the rear end of the diversion channel and the trailing edge. The throttling block is provided with a throttling orifice, the front end of which is connected to the rear end of the diversion channel, and the rear end of which is connected to the trailing edge. The cross-sectional area of ​​the throttling orifice is smaller than that of the diversion channel. A filter screen is disposed in the split air passage; A cover is disposed at the leading edge and seals the diversion air passage; when the cover is opened, the airflow at the leading edge enters the diversion air passage; An air supply device is provided, wherein the air storage chamber of the air supply device is connected to the diversion air channel; the air supply device is used to supply air to the turbulence air hole so that the airflow ejected outward through the turbulence air hole blows away the sand and dust on the surface of the blade body, while reducing the gas flow velocity on the suction surface, thereby reducing the lift of the blade body. The wind turbine blade assembly further includes a wind speed sensor, a drive module, and a thermoelectric generator; the drive module is connected to the wind speed sensor and the cover; the wind speed sensor outputs a load reduction signal to the drive module when the measured ambient wind speed is greater than a critical wind speed threshold, and the drive module drives the cover to open when it receives the load reduction signal; the thermoelectric generator is attached to the outer wall of the air duct of the split air duct and the outer wall of the throttling block, and is electrically connected to the air supply device, the wind speed sensor, and the drive module; the thermoelectric generator converts the internal energy generated by the friction between the airflow and the inner wall of the air duct of the split air duct and the wall of the throttling orifice into electrical energy to power at least one of the air supply device, the wind speed sensor, and the drive module.

2. The wind turbine blade assembly as described in claim 1, characterized in that, The wind turbine blade assembly also includes a heat insulation layer, which covers the outer wall of the air duct of the split air duct and the outer wall of the throttling block, and the semiconductor thermoelectric generator is located within the coverage area of ​​the heat insulation layer.

3. The wind turbine blade assembly as described in claim 1, characterized in that, The wind turbine blade assembly also includes a heating assembly, which is disposed in the air path between the air supply device and the turbulence vent; the heating assembly is used to increase the temperature of the airflow ejected outward from the turbulence vent through heating operation, so as to melt the ice layer on the surface of the blade body.

4. The wind turbine blade assembly as described in claim 3, characterized in that, The suction surface is provided with multiple arrayed storage holes; the wind turbine blade assembly also includes a water storage container and a negative pressure device, the water storage container and the negative pressure device being connected to the storage holes; When the gas supply device supplies gas to the turbulence vent, and the heating component performs a heating operation, the negative pressure device is used to perform a negative pressure suction operation on the storage vent, so as to draw the water formed after the ice layer on the suction surface melts through the storage vent into the water storage container.

5. The wind turbine blade assembly as described in claim 4, characterized in that, The wind turbine blade assembly also includes a spraying device connected to the water storage container; the spraying device is used to spray the filter screen and / or the blade body with the water stored in the water storage container.

6. The wind turbine blade assembly as described in any one of claims 1 to 5, characterized in that, The pressure surface has a recessed portion on the side near the rear edge; the wind turbine blade assembly also includes a conforming airbag, which includes a first airbag body and a second airbag body. The first airbag body is attached to the surface of the recessed portion, and the second airbag body is located on the side of the first airbag body facing away from the recessed portion. The first airbag body and the second airbag body enclose an inflation chamber, and the inflation chamber is connected to the air supply device. The air supply device is used to supply air to the inflation chamber so that the conformal airbag inflates and expands, thereby moving the second bladder away from the first bladder.

7. A wind turbine generator set, characterized in that, The wind turbine generator set includes the wind turbine blade assembly as described in any one of claims 1 to 6.

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