Wind power generation device and wind power generation system
By designing the triangular prism fan blade body, the problem of wind turbine efficiency decreases when wind direction changes is solved, and efficient wind energy capture and maintenance costs are achieved.
Patent Information
- Application Number
- CN202422362255.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-26
AI Technical Summary
Existing wind turbines are difficult to adapt quickly when the wind direction changes, resulting in a decrease in power generation efficiency and increasing the mechanical wear and maintenance costs of the yaw system.
The fan blade body consisting of three contour lines in cross-section, at least one contour line is arc-shaped, forming a triangular prism structure, increasing the wind contact area and reducing dependence on the yaw system.
Improves wind energy utilization efficiency, reduces the operating frequency of yaw systems, and reduces mechanical wear and maintenance costs.
Smart Images
Figure CN223164636U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of new energy power generation, and particularly to a wind power generation device and a wind power generation system. Background Art
[0002] In the field of wind power generation, a wind turbine generally includes a nacelle 10 and one or more blades 30. As Figure 1 shown, a generator and other mechanical devices are installed in the nacelle 10, and the blades 30 are installed on a hub 20 at the front end of the nacelle. When the wind blows over the blades 30, the blades 30 start to rotate under the action of the wind force, and drive the generator rotor to rotate through a transmission system, thereby generating electric energy.
[0003] The blades of existing wind turbines are generally of a plate-like structure. This structure can provide the maximum lift and the minimum drag when the wind direction is perpendicular to the blade plane, thereby capturing wind energy most effectively. However, when the wind direction changes, if the blade is no longer perpendicular to the wind direction but forms a certain angle with the wind direction, the effective area of the blade decreases, and the captured wind energy also decreases accordingly, which will cause the output power of the generator to drop. Modern wind turbines are usually equipped with a wind vane (wind tail rudder) and a yaw system. The wind vane can detect the change of the wind direction, and the yaw system adjusts the direction of the nacelle according to the information of the wind vane, so that the blade is always facing the wind direction. However, the response speed of the yaw system is limited. When the wind direction suddenly changes, even with the yaw system, there may be a short-term misalignment, resulting in the blade being unable to immediately align with the wind direction, thereby affecting the power generation efficiency. And frequent changes in the wind direction will increase the wear of mechanical components in the yaw system, which not only increases the maintenance cost but also may reduce the reliability of the system.
[0004] Therefore, a wind power generation device is needed to solve at least the above problems. Summary of the Utility Model
[0005] One technical problem to be solved by the present disclosure is: how to quickly adapt and maintain the ability of the blade to face the wind when the wind direction changes, while reducing the burden on the yaw system and avoiding mechanical wear caused by frequent adjustment.
[0006] To solve the above technical problem, an embodiment of the present disclosure provides a wind power generation device, including a device body; a rotating shaft, the rotating shaft includes a first end and a second end arranged opposite to each other, the first end is rotatably connected to the device body; and a plurality of fan blade bodies, the plurality of fan blade bodies are uniformly distributed in a circle at the second end of the rotating shaft, one end of the fan blade body is connected to the rotating shaft, and the plurality of fan blade bodies can rotate relative to the device body through the rotating shaft; wherein, the cross-section of the fan blade body is composed of three contour lines connected end to end in sequence, and at least one contour line is arc-shaped.
[0007] In some embodiments, the arc-shaped contour line appears in a form that approaches the center from the edge in the cross-section.
[0008] In some embodiments, all three contour lines are arc-shaped.
[0009] In some embodiments, each contour line is tangent to each other.
[0010] In some embodiments, the arc length and radius of each contour line are equal.
[0011] In some embodiments, there are three fan blade bodies, and the edges of the three fan blade bodies are located on different surfaces respectively.
[0012] In some embodiments, the wind power generation device further includes: a connecting part, the fan blade body is connected to the rotating shaft through the connecting part; the connecting part is a columnar structure, and one end of the connecting part facing away from the device body is hemispherical.
[0013] In some embodiments, the wind power generation device further includes: a connecting rod, the fan blade body is rotatably connected to the connecting part through the connecting rod, and the fan blade body can rotate relative to the connecting part around its own center line.
[0014] In some embodiments, the wind power generation device further includes: a sleeve, the sleeve is a hollow structure, one end of the sleeve is fixedly connected to the fan blade body, the connecting rod is a shaft structure, the other end of the sleeve is sleeved on the outer periphery of the connecting rod, and the inner diameter of the sleeve is larger than the diameter of the connecting rod; a limiting member, the limiting member is respectively connected to the connecting rod and the sleeve, and is used to limit the rotation of the sleeve relative to the connecting rod.
[0015] The embodiments of the present disclosure also provide a wind power generation system, including the above-mentioned wind power generation device.
[0016] Through the above technical solutions, for the wind power generation device provided by the present disclosure, since the cross-section of the fan blade body is composed of three contour lines, it forms a triangular prism structure. The multi-faceted nature of the triangular prism structure allows the fan blade body to capture wind energy under different wind direction conditions. At least one of the contour lines in the fan blade body is arc-shaped, which makes one side of the fan blade body present an arc shape. The arc-shaped surface helps the airflow to flow more smoothly over the surface of the fan blade body and increases the contact area with the wind force, so that the fan blade body can capture the wind force in time and improve the utilization efficiency of wind energy. Since the wind force can be captured in time, the dependence on the yaw system is effectively reduced, the operation frequency of the moving parts is reduced, and thus the overall maintenance cost is reduced. Description of the Drawings
[0017] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.
[0018] Figure 1 is a schematic structural diagram of a wind turbine in the prior art;
[0019] Figure 2 is a schematic structural diagram of a wind power generation device disclosed in an embodiment of the present disclosure;
[0020] Figure 3 is a schematic structural diagram of a blade body in a wind power generation device disclosed in an embodiment of the present disclosure;
[0021] Figure 4 is a cross-sectional schematic diagram of a blade body in a wind power generation device disclosed in an embodiment of the present disclosure;
[0022] Figure 5 is a schematic structural diagram of the connection between a blade body and a connection part in a wind power generation device disclosed in an embodiment of the present disclosure.
[0023] Explanation of reference numerals:
[0024] 10, nacelle; 20, hub; 30, blade;
[0025] 1, device body; 2, rotating shaft; 3, blade body; 301, contour line; 302, edge; 4, connection part; 5, connecting rod; 6, sleeve; 7, limiting part. Detailed implementation manners
[0026] The following further describes the implementation manners of the present disclosure in detail with reference to the accompanying drawings and embodiments. The detailed description and the accompanying drawings of the following embodiments are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms, not limited to the specific embodiments disclosed in the text, but including all technical solutions falling within the scope of the claims.
[0027] These embodiments of the present disclosure are provided to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of the components and steps described in these embodiments, the components of the materials, the numerical expressions and the numerical values should be interpreted as merely exemplary, rather than as limitations.
[0028] It should be noted that in the description of the present disclosure, unless otherwise specified, "a plurality of" means greater than or equal to two; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0029] In addition, the "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Terms such as "including" or "comprising" mean that the elements before this word cover the elements listed after this word, and do not exclude the possibility of also covering other elements.
[0030] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.
[0031] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as those, should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.
[0032] Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technologies, methods and devices should be regarded as part of the specification.
[0033] Embodiment 1
[0034] In order to solve the problems existing in the prior art, an embodiment of the present disclosure provides a wind power generation device, as Figure 2As shown in the figure, it includes: a device body 1; a rotating shaft 2, the rotating shaft 2 includes a first end and a second end arranged oppositely, the first end is rotatably connected to the device body 1; and a plurality of fan blade bodies 3, the plurality of fan blade bodies 3 are evenly distributed in a circumferential manner at the second end of the rotating shaft 2, one end of the fan blade body 3 is connected to the rotating shaft 2, and the plurality of fan blade bodies 3 can rotate relative to the device body 1 through the rotating shaft 2; wherein, the cross-section of the fan blade body 3 is composed of three contour lines 301 connected end to end in sequence, and at least one contour line 301 is arc-shaped.
[0035] The device body 1 is the basic structural part of the wind power generation device, used to support and fix other components, and can be a frame structure for lifting the rotating shaft 2 and the fan blade body 3 to an appropriate wind height. The first end of the rotating shaft 2 is rotatably connected to the device body 1, which can be realized through a bearing or other similar mechanisms, so that the rotating shaft 2 can rotate around its axis, and the second end of the rotating shaft 2 is connected to a plurality of fan blade bodies 3.
[0036] One end of the fan blade body 3 is fixedly connected to the second end of the rotating shaft 2, so that the fan blade body 3 can rotate synchronously with the rotating shaft 2. The cross-section of the fan blade body 3 is composed of three contour lines 301, forming a closed triangular prism structure. The multi-faceted nature of the triangular prism structure allows the fan blade body 3 to capture wind energy under different wind direction conditions. Even when the wind direction deviates, it can continue to effectively capture wind power through its side surface, reducing the impact of wind direction changes on the power generation efficiency. Among them, at least one of the contour lines 301 of the fan blade body 3 is arc-shaped, which means that one side surface of the fan blade body 3 is arc-shaped. This arc-shaped surface helps the air flow to flow more smoothly over the surface of the fan blade, and enables the blade to capture wind power in a timely manner, thereby improving the utilization efficiency of wind energy.
[0037] The wind power generation device provided by the embodiments of the present disclosure can efficiently capture wind energy in multiple directions due to the fan blade body 3. Even in an environment where the wind direction changes rapidly, the fan blade body 3 with a triangular prism structure can quickly adapt to the new wind direction to ensure the power generation efficiency. At least one side of the fan blade body 3 is an arc-shaped surface, which increases the contact area with the wind power, enabling the blade to capture wind power in a timely manner and effectively avoiding the decrease in power generation efficiency caused by the slow response of the yaw system. Since the dependence on the yaw system is reduced, the operation frequency of the moving parts can be lowered, which not only reduces the wear of the yaw system but also reduces the overall maintenance cost.
[0038] In some embodiments, as Figure 4 shown, the arc-shaped contour line 301 shows a form approaching from the edge to the center in the cross-section.
[0039] The cross-section of the fan blade body 3 is composed of three contour lines 301, and at least one of the contour lines 301 is arc-shaped. This arc-shaped contour line 301 shows a shape that gradually approaches the center from the edge of the fan blade body 3 in the cross-section, forming a concave surface. According to Bernoulli's principle, when the air flow passes through the concave surface, its speed increases and the pressure decreases, generating a pressure difference with the surrounding environment. This pressure difference will generate a lift force perpendicular to the air flow direction, thereby generating a torque to drive the rotation of the fan blade body 3. The concave surface design can generate sufficient torque at lower wind speeds by enhancing the lift effect, driving the rotation of the rotating shaft 2, and thus improving the starting performance of the wind power generation device. When the wind direction changes and there is an angle between the wind direction and the radial direction of the fan blade body 3, the wind force will generate a component force in the rotation direction of the fan blade body 3. Due to the existence of the concave surface, this component force can be more effectively converted into a rotational torque, and even when the wind direction is not completely perpendicular to the fan blade body 3, sufficient torque can be generated to drive the rotation of the rotating shaft 2. This further improves the starting performance of the wind power generation device.
[0040] To ensure that the fan blade body 3 is both lightweight and strong, high-strength composite materials or lightweight alloys can be selected as the manufacturing materials.
[0041] In some embodiments, such as Figure 3 and Figure 4 shown, all three contour lines 301 are arc-shaped.
[0042] The cross-section of the fan blade body 3 is composed of three arc-shaped contour lines 301. These three arc-shaped contour lines 301 are connected to each other to form a closed shape, and each side of the fan blade body 3 is a concave arc surface. The curvature of each arc can be adjusted according to the specific usage environment and design objectives to achieve the best aerodynamic performance. It can be processed by a computer numerical control (CNC) machine tool or directly formed by three-dimensional printing technology. The design of the three arc-shaped contour lines 301 enables the fan blade body 3 to further increase its ability to capture wind power, maintain a high wind energy capture efficiency under different wind direction conditions, further reduce the efficiency loss caused by wind direction changes, and reduce the adjustment pressure on the yaw system.
[0043] In some embodiments, each contour line 301 is arranged to be tangent to each other.
[0044] The cross-section of each blade body 3 is composed of three circular arc contour lines 301. These three circular arc contour lines 301 are smoothly tangent at the intersections, and the circular arc contour lines 301 are in a shape that approaches the center of the blade body 3, so that the circular arc contour lines 301 exhibit the maximum curvature. This design reduces the angles at the three edges 302 of the blade body 3, and at the same time reduces the volume and weight of the blade body 3. When the wind acts on an arc surface of the blade body 3, the air flow is effectively guided to the edge of the blade body 3. Due to the smaller angles at the edges 302, the air flow is more inclined to flow along the blade edge. Combined with the reduction of the volume and weight of the blade body 3, the lift effect is further enhanced. When the air flow passes through the blade body 3, a large torque is generated in the rotation direction, thus generating a stronger driving force. In this way, even under low wind speed conditions, the blade body 3 can generate sufficient torque to drive the rotation of the rotating shaft 2, significantly improving the starting performance and efficiency of the wind power generation device. And because the contour lines 301 are tangent to each other, the cross-section of the blade body 3 has a high degree of symmetry, which helps to maintain the balance of the blade during rotation and reduce vibration and noise.
[0045] In some embodiments, the arc lengths and radii of each contour line 301 are equal.
[0046] The cross-section of each blade body 3 is composed of three circular arcs with the same radius and arc length. These circular arcs are tangent to each other to form a closed shape. Since the specifications of each circular arc are the same, this ensures that the blade body 3 exhibits consistent aerodynamic characteristics in all directions, which helps to effectively start the blade under low wind speed conditions and improve the starting performance of the wind power generation device.
[0047] In some embodiments, there are three blade bodies 3, and the edges 302 of the three blade bodies 3 are respectively located on different faces.
[0048] The three independent blade bodies 3 are evenly arranged in a circumferential manner around the second end of the rotating shaft 2, and the design of each blade body 3 is exactly the same. By respectively locating the edges 302 of each blade body 3 on different planes, it is ensured that the arc surfaces of each blade body 3 face different directions. Since the arc surfaces of each blade body 3 face different directions, a larger surface area is provided as a whole to capture wind energy, enhancing the wind energy capture ability. The blade body 3 can more flexibly adapt to the change of the wind direction. No matter how the wind direction changes, there is always one or more arc surfaces of the blade body 3 that can effectively capture wind energy.
[0049] In some embodiments, as Figure 2 shown, the wind power generation device further includes: a connecting portion 4, and the blade body 3 is connected to the rotating shaft 2 through the connecting portion 4; the connecting portion 4 is in a columnar structure, and the end of the connecting portion 4 facing away from the device body 1 is hemispherical.
[0050] The connecting part 4 is used to firmly connect the fan blade body 3 and the rotating shaft 2 together. Its columnar structure allows multiple fan blade bodies 3 to be evenly distributed around the connecting part 4 in a circumferential manner. One end of the connecting part 4 away from the device body 1 is designed in a hemispherical shape, which helps to optimize the air flow. When the wind acts on the connecting part 4, the hemispherical structure can effectively guide the wind flow to the fan blade body 3, enhancing the wind force flowing to the surface of the fan blade body 3 and making it easier to drive the fan blade body 3 to rotate, thereby improving the overall efficiency of the wind power generation device.
[0051] In some embodiments, such as Figure 2 and Figure 5 shown, the wind power generation device further includes: a connecting rod 5. The fan blade body 3 is rotatably connected to the connecting part 4 through the connecting rod 5, and the fan blade body 3 can rotate relative to the connecting part 4 around its own center line.
[0052] The connecting rod 5 is located between the fan blade body 3 and the connecting part 4. Through the connecting rod 5, the fan blade body 3 and the connecting part 4 are rotatably connected. This enables the fan blade body 3 to rotate around its center line, and then, according to the local wind direction information, the orientation of the fan blade body 3 relative to the connecting part 4 can be adjusted to ensure that its arc surface is always at the optimal windward angle to maximize the wind energy capture efficiency. The precise alignment of the fan blade body 3 reduces the energy loss caused by wind direction deviation, thereby improving the overall power generation efficiency. The connection of the connecting rod 5 provides flexible adjustment ability and simplifies the operation and maintenance process. Especially under complex wind field conditions, it becomes more convenient to frequently adjust the angle of the fan blade body 3.
[0053] In some embodiments, such as Figure 5 shown, the wind power generation device further includes: a sleeve 6. The sleeve 6 has a hollow structure. One end of the sleeve 6 is fixedly connected to the fan blade body 3. The connecting rod 5 is a shaft structure. The other end of the sleeve 6 is sleeved on the outer periphery of the connecting rod 5. The inner diameter of the sleeve 6 is larger than the diameter of the connecting rod 5; a limiting member 7, which is connected to the connecting rod 5 and the sleeve 6 respectively and is used to limit the rotation of the sleeve 6 relative to the connecting rod 5.
[0054] The sleeve 6 adopts a hollow structure. One end is fixedly connected to the fan blade body 3, and the other end is sleeved on the connecting rod 5. The inner diameter of the sleeve 6 is slightly larger than the diameter of the connecting rod 5, forming an interference fit. The connecting rod 5 is a shaft structure to ensure that the connecting rod 5 can rotate freely inside the sleeve 6. The limiting member 7 can adopt various forms, such as snap rings, pins, bolts, etc., passing through the sleeve 6 and the connecting rod 5 to prevent the sleeve 6 from sliding or rotating on the connecting rod 5. When the fan blade body 3 is adjusted to the optimal windward angle, the limiting member 7 fixes the positions of the connecting rod 5 and the sleeve 6, enhancing the structural stability and preventing loosening or displacement under the action of wind. The combination of the sleeve 6 and the limiting member 7 not only makes the adjustment of the fan blade body 3 flexible, but also ensures the firmness and durability of the connection, thereby improving the overall performance and efficiency of the wind power generation device.
[0055] The wind power generation device provided by the embodiment of the present disclosure adopts a fan blade body 3 with a cross-section composed of three arc contour lines 301, effectively solving the problem that the fan blades of traditional wind turbines may stop rotating when the wind direction changes. The wind power generation device ensures that the fan blade body 3 can continuously rotate under any wind direction condition, thereby realizing stable power generation and avoiding power generation interruption caused by wind direction change. In addition, due to reducing the dependence on the yaw system and lowering its operation frequency, this not only reduces the wear of the yaw system, but also reduces the overall maintenance cost and system complexity.
[0056] Embodiment 2
[0057] The embodiment 2 of the present disclosure provides a wind power generation system, including the wind power generation device provided by Embodiment 1.
[0058] The wind power generation system may include main components such as a wind power generation device, a control system, a power conversion system, a yaw system, and an energy storage system. By integrating the efficient wind power generation device of Embodiment 1, the wind power generation system can convert wind energy into electrical energy more effectively, improving the overall power generation efficiency. And by reducing the dependence on the yaw system through the wind power generation device and lowering its operation frequency, the wear of the yaw system can be reduced, thereby reducing the maintenance cost of the wind power generation system.
[0059] So far, the embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed here based on the above description.
[0060] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration purposes and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or equivalent substitutions can be made for some technical features without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.
Claims
1. A wind power generation device, characterized in that, Comprising: The device body (1); A rotating shaft (2), the rotating shaft (2) includes a first end and a second end arranged oppositely, and the first end is rotatably connected to the device body (1); and, A plurality of fan blade bodies (3), the plurality of fan blade bodies (3) are evenly distributed in a circumferential manner at the second end of the rotating shaft (2), one end of the fan blade body (3) is connected to the rotating shaft (2), and the plurality of fan blade bodies (3) can rotate relative to the device body (1) through the rotating shaft (2); Wherein, the cross-section of the fan blade body (3) is composed of three contour lines (301) connected end to end in sequence, and at least one contour line (301) is arc-shaped.
2. The wind power generation device according to claim 1, wherein The arc-shaped contour line (301) shows a form approaching from the edge to the center in the cross-section.
3. The wind power generation device according to claim 2, wherein All three of the contour lines (301) are arc-shaped.
4. The wind power generation device according to claim 3, wherein Each of the contour lines (301) is arranged to be tangent to each other.
5. The wind power generation device according to claim 4, wherein The arc length and radius of each of the contour lines (301) are equal.
6. The wind power generation device according to claim 3, wherein There are three fan blade bodies (3), and the edges (302) of the three fan blade bodies (3) are respectively located on different surfaces.
7. The wind power generation device according to claim 3, characterized in that, Further comprising: A connecting portion (4), the fan blade body (3) is connected to the rotating shaft (2) through the connecting portion (4); The connecting portion (4) is a columnar structure, and one end of the connecting portion (4) facing away from the device body (1) is hemispherical.
8. The wind power generation device according to claim 7, characterized in that, Further comprising: A connecting rod (5), the fan blade body (3) is rotatably connected to the connecting portion (4) through the connecting rod (5), and the fan blade body (3) can rotate relative to the connecting portion (4) around its own center line.
9. The wind power generation device according to claim 8, characterized in that, Further comprising: A sleeve (6), the sleeve (6) is a hollow structure, one end of the sleeve (6) is fixedly connected to the fan blade body (3), the connecting rod (5) is a shaft structure, the other end of the sleeve (6) is sleeved on the outer periphery of the connecting rod (5), and the inner diameter of the sleeve (6) is larger than the diameter of the connecting rod (5); A limiting member (7), the limiting member (7) is respectively connected to the connecting rod (5) and the sleeve (6) for restricting the rotation of the sleeve (6) relative to the connecting rod (5).
10. A wind power generation system, characterized in that, Including the wind power generation device according to any one of claims 1-9.