Wind power generation equipment

Abstract

The invention discloses wind power generation equipment. The equipment comprises a blade in a sweepback shape, and the blade tip deviation angle of the blade in the sweepback shape is adjusted according to the current wind speed; the energy gathering cover is installed on the outer side of the sweepback-shaped blade, the inner side of the side wall of the energy gathering cover has a plurality of inner wall radius sizes, and the energy gathering cover is arranged to gather the collected wind power; and the connecting and supporting structure is arranged on the energy gathering cover and used for fixing the energy gathering cover to the supporting base where the sweepback-shaped blades are located. The technical problem that the power generation efficiency of the wind generating set is low due to the fact that the structural design of the wind generating set provided in the prior art has certain defects is solved.

Description

Technical Field

[0001] The present application relates to the field of energy control, and in particular, to a wind power generation device. Background Art

[0002] As a renewable and clean energy source, wind power generation has been widely used around the world. However, wind farms are often affected by extreme weather conditions, such as strong winds, sandstorms, freezing rain and snow, which may cause physical damage to wind power equipment. In addition, when the natural wind speed is too high in good weather, the blades will easily be overloaded, resulting in irreversible damage to the blades. These negative effects will reduce the power generation efficiency of wind power equipment and even cause shutdown.

[0003] That is to say, the structural design of the wind turbine generator set provided by the prior art has certain defects, which leads to the problem of low power generation efficiency of the wind turbine generator set.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiment of the present application provides a wind power generation device to at least solve the technical problem that the structural design of the wind power generator set provided by the prior art has certain defects, thereby resulting in low power generation efficiency of the wind power generator set.

[0006] According to one aspect of an embodiment of the present application, a wind power generation equipment is provided, comprising: a swept-back blade, wherein the swept-back blade adjusts the tip deflection angle according to the current wind speed; an energy concentrating hood installed on the outer side of the swept-back blade, the inner side of the side wall of the energy concentrating hood having a plurality of inner wall radius sizes, and the energy concentrating hood being configured to gather the collected wind force; and a connecting support structure arranged on the energy concentrating hood, for fixing the energy concentrating hood on a supporting base where the swept-back blade is located.

[0007] As an optional implementation, a plurality of connection point positions are provided on the connection support structure, and the energy collecting cover will be adjusted to different connection point positions under different wind energy collection conditions.

[0008] As an optional embodiment, the connection support structure is configured as a rotatable structure, and the connection support structure in different wind directions will rotate by offset to guide the wind wheel where the blades are located to turn.

[0009] As an optional implementation, a streamlined wind guide plate is provided inside the energy concentrating hood to adjust the direction of the wind flowing through the energy concentrating hood.

[0010] As an optional embodiment, the end of the swept-back blade pointing to the energy concentrating hood is set as a swept blade tip. When the wind force received by the swept-back blade tip is higher than the wind force threshold, the swept-back blade tip will adjust the tip deflection angle through elastic deformation. When the wind force received by the swept-back blade tip is lower than the wind force threshold, the swept-back blade tip will be reset.

[0011] As an optional embodiment, a wind speed sensor is provided on the above-mentioned swept-back blade, and when the wind speed detected by the above-mentioned wind speed sensor exceeds a preset threshold, the above-mentioned tip deflection angle of the above-mentioned swept-back blade will be adjusted from a first angle value to a second angle value, wherein the load of the above-mentioned blade at the above-mentioned second angle value is less than the load of the above-mentioned blade at the above-mentioned first angle value.

[0012] As an optional embodiment, it also includes: a processor, connected to the above-mentioned wind speed sensor, for determining the wind force level based on the wind speed detected by the above-mentioned wind speed sensor; and a controller, for adjusting the above-mentioned blade tip deflection angle of the above-mentioned swept-back blade to an angle value matching the above-mentioned wind force level.

[0013] As an optional implementation, a shock-absorbing connection structure is provided on the connection support structure.

[0014] As an optional implementation, the energy concentrating cover is made of composite materials or light metal.

[0015] As an optional implementation, the swept-back blades are made of shape memory alloy material.

[0016] In an embodiment of the present application, an energy concentrating hood is provided for the swept-back blades, and the shape and size of the energy concentrating hood are optimized. The inner side of the side wall of the energy concentrating hood has a plurality of inner wall radius sizes, so that the collected wind force can be gathered to better combine with the swept-back blades, thereby improving the wind concentrating effect, thereby achieving the effect of improving the power generation efficiency of the wind turbine, while ensuring the performance of rapid load reduction, thereby solving the technical problem that the structural design of the wind turbine provided by the prior art has certain defects, thereby resulting in low power generation efficiency of the wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 is a schematic diagram of an optional wind power generation equipment according to an embodiment of the present application;

[0019] Figure 2is a schematic diagram of another optional wind power generation equipment according to an embodiment of the present application;

[0020] Figure 3 is a schematic diagram of another optional wind power generation equipment according to an embodiment of the present application;

[0021] Figure 4 It is a schematic diagram of another optional wind power generation equipment according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] According to one aspect of the embodiments of the present application, a wind power generation device is provided, such as Figure 1 Said to be, the device includes:

[0025] A swept-back blade 102, wherein the swept-back blade adjusts the tip deflection angle according to the current wind speed;

[0026] Optionally, in this embodiment, the above-mentioned wind power generation equipment can be used in a regional scenario for collecting wind energy, such as a wind farm, but is not limited to being used. Specifically, the wind farm can be configured with, but is not limited to, multiple wind power generation equipment, each of which converts the collected wind energy into electrical energy and transmits it to the energy storage device for storage.

[0027] Optionally, in this embodiment, the swept-back blade refers to a blade design in which the tip is tilted backward relative to the root. This design can reduce the turbulent separation at the leading edge of the blade, reduce the resistance of the blade, make the fluid flow smoother, and improve the aerodynamic performance of the blade in high-speed wind, thereby reducing the vibration of the blade, reducing noise, and improving the wind energy capture efficiency of the wind turbine. Among them, the turbulent separation here refers to the fact that in aerodynamics, when a fluid (such as air) flows over the surface of the blade, if the curvature of the blade surface changes too much or the fluid speed is too fast, the fluid laminar flow may be transformed into turbulence near the leading edge of the blade, and under certain conditions, the turbulent fluid may not be able to continue to flow close to the blade surface, but separate on the blade surface to form a so-called turbulent separation zone. On the blades of a wind turbine, this turbulent separation phenomenon will cause the aerodynamic performance of the blade to decrease, increase the friction resistance and pressure difference resistance on the blade surface, and thus reduce the overall efficiency of the wind turbine. In addition, turbulent separation will also generate noise and vibration, which will have a negative impact on the stability and service life of the wind turbine.

[0028] Optionally, in this embodiment, the swept-back blades may be made of, but not limited to, shape memory alloys. By manufacturing the blades with such lightweight and high-strength materials, the weight of the blades will be reduced, thereby reducing the stress under the action of wind.

[0029] In addition, in this embodiment, the swept-back blades may also, but are not limited to, use a composite fiber arrangement to enhance the fatigue resistance of the blades. It should be noted that the fiber arrangement of the composite material refers to the arrangement direction and distribution of the reinforcing fibers in the composite laminate. These fibers are usually high-strength materials, such as carbon fibers, glass fibers or aramid fibers, which are embedded in a matrix material (such as epoxy resin) to significantly improve the mechanical properties of the composite material, such as strength, rigidity and fatigue resistance. Fiber arrangement has a direct and important impact on the performance of the composite material, mainly including the following:

[0030] Unidirectional Fibers: In this arrangement, all fibers are aligned in one direction. This arrangement provides maximum strength and rigidity and is usually used for components that need to withstand loads in a specific direction.

[0031] Bidirectional or Fabric Fibers: Fibers are staggered in two orthogonal directions to form a fabric structure. This arrangement provides good bidirectional strength and is suitable for parts that need to withstand loads in multiple directions.

[0032] Bias Fibers: Fibers are arranged at an angle (usually 45°) relative to the plane of the composite material. Bias fibers can increase the composite material's ability to resist shear forces and are suitable for torsion and shear resistant parts.

[0033] Multiaxial Fibers: Fibers are arranged in multiple directions, which can be three-way, four-way or even more. This arrangement can provide high performance of composite materials in multiple directions and is suitable for structural parts that require all-round strength.

[0034] Laminate Design: Composite laminates are composed of multiple layers of fiber-reinforced composite materials, and the fiber arrangement direction of each layer can be different. By designing the arrangement of each layer of fiber in the laminate, the mechanical properties of the composite material in different directions can be optimized to meet specific engineering requirements.

[0035] Fiber Volume Fraction: The proportion of fiber content in a composite material, usually expressed as a volume percentage. Adjustment of the fiber volume fraction can affect the density, strength and rigidity of the composite material, so it is an important parameter in fiber layout design.

[0036] Fiber Orientation: The specific orientation of fibers in a composite material, which directly affects the anisotropic properties of the material. For example, in a wind turbine blade, the fibers may be arranged along the length of the blade to provide maximum bending strength; while at the root of the blade, the fibers may be arranged in a multi-axial direction to improve torsional performance.

[0037] Through the above-mentioned fiber arrangement, the performance of the composite material can be maximized while ensuring the stability and reliability of the structure. In the application of wind power generation equipment such as wind turbine blades, the optimization of fiber arrangement can significantly improve the wind resistance of the blades, reduce weight, reduce manufacturing costs, and improve the overall equipment performance.

[0038] Optionally, in this embodiment, the surface microstructure of the above-mentioned swept-back blade may also refer to a small-scale structure added to the blade surface, such as a serrated edge or a vortex generator, to optimize the behavior of the airflow on the blade surface, improve airflow separation, and reduce drag and noise.

[0039] It should be noted that airflow separation usually occurs at the trailing edge of the blade, resulting in reduced blade efficiency and noise. By designing a serrated edge, the laminar state of the boundary layer can be destroyed, prompting the laminar flow to transform into turbulent flow in advance. The turbulent flow can better follow the blade surface, reduce airflow separation, thereby reducing resistance and improving wind energy absorption efficiency. Vortex generators are another type of microstructure. They can be placed on the leading or trailing edge of the blade, but are not limited to being placed on the leading or trailing edge of the blade. They improve the attachment of the airflow by generating small vortices, reduce the pressure difference on the blade surface, and thus reduce resistance and noise. The design and location of the vortex generators need to be carefully selected to avoid unnecessary aerodynamic losses or increase the weight of the blade.

[0040] The energy concentrating hood 104 is installed on the outer side of the swept blade, and the inner side of the side wall of the energy concentrating hood has multiple inner wall radius sizes. The energy concentrating hood is configured to gather the collected wind force;

[0041] Optionally, in this embodiment, the energy concentrator can be used as, but not limited to, an auxiliary device of a wind power generation device, which is used to increase the wind force reaching the blades by changing the direction and speed of the airflow, thereby improving the wind energy capture efficiency. The energy concentrator in this embodiment is set to a specific shape, the energy concentrator is in a circular ring shape, but the side wall of the energy concentrator in the side view is designed to have a certain curvature.

[0042] Optionally, in this embodiment, the energy concentrating hood may be provided with a streamlined wind guide plate inside, which is used to adjust the direction of the wind flowing through the energy concentrating hood, thereby reducing wind resistance and increasing the convergence effect of wind speed. In addition, in this embodiment, the opening angle and length of the energy concentrating hood may be adjusted, but not limited to, to adapt to a specific wind power generation environment and wind turbine design.

[0043] Optionally, in this embodiment, the energy collecting cover is made of composite materials or light metal to reduce the weight of the energy collecting cover and reduce the additional load on the fan structure, while ensuring that the material has sufficient strength and weather resistance to resist the impact of harsh environments.

[0044] In addition, in this embodiment, the above-mentioned energy concentrating cover can also, but is not limited to, add a special coating or design structure on the surface to prevent the accumulation of dust, rain, snow and ice, thereby reducing the physical damage to the energy concentrating cover caused by natural disasters, and then ensuring that the blades surrounded by the energy concentrating cover can operate stably for a long time, thereby achieving the purpose of extending the service life of the wind power generation equipment and reducing operation and maintenance costs.

[0045] Optionally, in this embodiment, the energy concentrating hood may, but is not limited to, use sound-absorbing materials inside or on the surface or design specific noise suppression microstructures to reduce the noise generated when wind passes through the energy concentrating hood and reduce the impact on the wind farm environment.

[0046] Optionally, in this embodiment, the energy collecting hood can be configured with a self-cleaning mechanism on the surface, such as using super-hydrophobic materials, to avoid the accumulation of pollutants such as dust and bird droppings that affect the wind collection efficiency, thereby reducing the maintenance frequency of the energy collecting hood and further reducing the operation and maintenance costs of the wind farm.

[0047] Optionally, in this embodiment, a sensor and a processor may be provided in the energy collection cover, but not limited thereto, wherein the processor may be provided with, but not limited thereto, an intelligent control algorithm to achieve real-time response to the wind environment, and to automatically adjust the position or shape according to changes in wind direction and wind speed, so as to optimize the collection and conversion of wind energy. In addition, a transmission component may be provided on the energy collection cover, and the transmission component is coupled to the sensor to transmit the wind energy collection data collected by the sensor to the cloud server, and the intelligent control algorithm in the cloud server performs remote auxiliary calculation to achieve remote control of the wind power generation equipment.

[0048] In addition, in this embodiment, it is also possible but not limited to combine active control technology to work in coordination with the energy collection cover, such as using active jet to more effectively adjust the wind flow direction at high wind speeds, reduce the overload on the blades, and assist in achieving passive load reduction.

[0049] The connecting support structure 106 is arranged on the energy concentrating cover and is used to fix the energy concentrating cover on the supporting base where the swept-back blade is located.

[0050] Optionally, in this embodiment, the connection support structure may be provided with multiple connection points, but is not limited to, and the energy collecting hood will be adjusted to different connection points under different wind energy collection conditions. Optionally, in this embodiment, a shock-absorbing connection structure is provided on the connection support structure.

[0051] For example, Figure 2 As shown, multiple connection point positions are set on the horizontal axis of the connection support structure, such as connection point position 202-2 to connection point position 202-N. In addition, multiple connection point positions can also be set on the vertical axis of the connection support structure (not shown in the figure).

[0052] Through the embodiments provided in the present application, an energy concentrating hood is provided for the swept-back blades, and the shape and size of the energy concentrating hood are optimized. The inner side of the side wall of the energy concentrating hood has a plurality of inner wall radius sizes, so that the collected wind force can be gathered to better combine with the swept-back blades, thereby improving the wind concentrating effect, thereby achieving the effect of improving the power generation efficiency of the wind turbine generator set, while ensuring the performance of rapid load reduction.

[0053] As an optional embodiment, the connecting support structure is configured as a rotatable structure, and the connecting support structure in different wind directions will rotate by offset to guide the wind wheel where the blades are located to turn.

[0054] Optionally, in this embodiment, at least one of the two ends of the above-mentioned connecting support structure can be, but is not limited to, configured as a rotatable structure. Figure 3 As shown, rotatable structures are arranged at both ends of the connecting support structure, and each rotatable structure is respectively provided with a corresponding limiting assembly to enable it to rotate within a predetermined range.

[0055] Through the embodiments provided by the present application, by setting the connecting support structure as a rotatable structure, the wind power generation equipment can be offset and rotated according to different wind directions, thereby controlling the wind power generation equipment to collect wind energy under different wind directions to expand the scope of wind energy collection.

[0056] As an optional embodiment, the end of the swept-back blade pointing to the energy concentrating hood is set as a swept blade tip. When the wind force received by the swept blade tip is higher than the wind force threshold, the swept blade tip will adjust the tip deflection angle through elastic deformation. When the wind force received by the swept blade tip is lower than the wind force threshold, the swept blade tip will be reset.

[0057] Optionally, in this embodiment, the angle adjustment of the swept blade tip may include but is not limited to: when the detected wind force is higher than the wind force threshold, the swept blade tip passively adjusts the tip deflection angle based on the wind force received. That is, when the wind force is higher than the wind force threshold, the swept blade tip here will deform according to the actual wind force, so that the swept blade tip can achieve adaptive adjustment of the tip deflection angle according to the actual detected wind force.

[0058] It should be noted that the swept blades in this embodiment are tilted backward to a greater extent, and the swept blade tip will dynamically adjust the deflection angle according to the actual wind force, which can effectively reduce the wind force on the blades, reduce the force on the blades, and improve the safety and stability of the wind turbine. In this way, during the operation of the wind power generation equipment, the blades can automatically adjust the angle of the blades when encountering a large wind speed to reduce the wind force on the blades, thereby protecting the entire wind turbine system from damage, and achieving the effect of passive load reduction.

[0059] Through the embodiments provided by the present application, the angle of the swept tip of the above-mentioned swept-back blade can be passively adjusted, thereby achieving passive load reduction of the wind power generation equipment, effectively reducing the force on the blades, improving the safety and stability of the wind turbine, and also improving the power generation efficiency.

[0060] As an optional embodiment, a wind speed sensor is provided on the swept-back blade. When the wind speed detected by the wind speed sensor exceeds a preset threshold, the tip deflection angle of the swept-back blade will be adjusted from a first angle value to a second angle value, wherein the load on the blade at the second angle value is less than the load on the blade at the first angle value.

[0061] Optionally, in this embodiment, a wind speed sensor may be provided on the swept blade, but is not limited to being provided thereon. The wind speed sensor is used to detect the wind speed of the wind passing therethrough, and when the wind speed detected by the wind speed sensor exceeds a preset threshold, the tip deflection angle of the swept blade is actively adjusted from a first angle value to a second angle value.

[0062] It should be noted that when the swept-back blades are subjected to wind force, the wind speed sensor installed on the blades will realize real-time detection of the wind speed of the wind passing through the blades, thereby achieving timely and flexible adjustment of the tip deflection angle of the swept-back blade tip based on the real-time detection results.

[0063] Through the embodiments provided by the present application, by configuring a wind speed sensor for the swept blades, active detection and active control of wind energy passing through can be achieved. At the same time, based on the detected real-time wind speed, the active adjustment of the tip deflection angle of the swept blades can also reduce the noise and vibration of the wind turbine and improve the power generation efficiency.

[0064] As an optional embodiment, it also includes: a processor connected to the wind speed sensor, used to determine the wind force level based on the wind speed detected by the wind speed sensor; a controller, used to adjust the tip deflection angle of the swept-back blade to an angle value matching the wind force level.

[0065] Optionally, in this embodiment, the processor can be disposed on the swept blade and directly connected to the wind speed sensor, so that the data detected by the wind speed sensor is directly transmitted to the processor. In addition, in this embodiment, the processor can also be connected in the control device of the wind power generation equipment through a wired network to realize wired transmission of data, or through a wireless network connection to realize wireless transmission of data.

[0066] For example, Figure 4 As shown, it is assumed that the wind speed sensor 402 of the wind power generation equipment is set on the blade, and the processor 404 and the controller 406 can be integrated into one device to achieve wireless transmission of data through a wireless network.

[0067] Optionally, in this embodiment, the above-mentioned processor can be but is not limited to a built-in data analysis algorithm for performing data analysis and processing on the data transmitted by the wind speed sensor (such as wind speed and blade force conditions), so as to dynamically adjust the tip deflection angle of the swept-back blade to adapt to different wind conditions.

[0068] Through the embodiments provided in the present application, a processor and a controller are provided to cooperate with the wind speed sensor to realize a multi-level passive load reduction mechanism for wind power generation equipment, thereby achieving the effect of flexibly responding to sudden changes in wind speed and improving the overall safety of the system.

[0069] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0070] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0071] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0072] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0073] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A wind power generation device, characterized in that: include: A swept-back blade, wherein the swept-back blade adjusts the tip deflection angle according to the current wind speed; An energy concentrating hood is installed on the outer side of the swept-back blade, the inner side of the side wall of the energy concentrating hood has a plurality of inner wall radius sizes, and the energy concentrating hood is configured to gather the collected wind force; The connecting support structure is arranged on the energy concentrating cover and is used for fixing the energy concentrating cover on the supporting base where the swept-back blade is located.

2. The device according to claim 1, characterized in that The connection support structure is provided with a plurality of connection point positions, and the energy collecting cover will be adjusted to different connection point positions under different wind energy collection conditions.

3. The device according to claim 1, characterized in that The connecting support structure is configured as a rotatable structure, and the connecting support structure in different wind directions will rotate by offset to guide the wind wheel where the blades are located to turn.

4. The device according to claim 1, characterized in that A streamlined wind guide plate is provided inside the energy gathering hood to adjust the direction of the wind flowing through the energy gathering hood.

5. The device according to claim 1, characterized in that One end of the swept-back blade pointing to the energy concentrating hood is set as a swept blade tip. When the wind force applied to the swept blade tip is higher than a wind force threshold, the swept blade tip will adjust the tip deflection angle through elastic deformation. When the wind force applied to the swept blade tip is lower than the wind force threshold, the swept blade tip will be reset.

6. The device according to claim 1, characterized in that A wind speed sensor is provided on the swept-back blade. When the wind speed detected by the wind speed sensor exceeds a preset threshold, the tip deflection angle of the swept-back blade will be adjusted from a first angle value to a second angle value, wherein the load on the blade at the second angle value is less than the load on the blade at the first angle value.

7. The device according to claim 1, characterized in that Also includes: a processor, connected to the wind speed sensor, and configured to determine a wind force level according to the wind speed detected by the wind speed sensor; A controller is used to adjust the tip deflection angle of the swept-back blade to an angle value that matches the wind force level.

8. The device according to any one of claims 1 to 7, characterized in that A shock-absorbing connection structure is arranged on the connection support structure.

9. The device according to any one of claims 1 to 7, characterized in that The energy gathering cover is made of composite material or light metal.

10. The device according to any one of claims 1 to 7, characterized in that The swept-back blades are made of shape memory alloy material.

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