Rotor and wind turbine generator set

Abstract

This invention relates to an impeller and a wind turbine generator set. The impeller includes: a hub with a rotation axis; blades, two or more blades spaced apart around the rotation axis and connected to the hub; and connecting cables, at least two adjacent blades being connected by the connecting cables, wherein the tension of the connecting cables acting on the connected blades is adjustable. The impeller provided by the embodiments of this invention can meet the performance requirements of wind turbine generator sets, while also exhibiting high stability and low cost.

Description

Technical Field

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

[0002] In wind turbine generators, the rotor plays a crucial role in the conversion of wind energy. The rotor typically consists of a hub and blades. As the power requirements of wind turbine generators continue to increase, the blades are becoming longer, with the longest blades exceeding 100m. The increase in blade length also gradually increases the load they bear, mainly torsional loads. The increase in torsional loads poses a threat to blade stability, making them prone to instability.

[0003] Currently, the main method to mitigate blade instability in blade design is to increase the torsional stiffness of the blade, that is, to add multi-axial layers to the blade skin to improve the torsional stiffness of the blade and alleviate the occurrence of instability. However, this method greatly increases the number of blade layers, resulting in an increase in the overall weight of the impeller and higher costs. Summary of the Invention

[0004] This invention provides an impeller and a wind turbine generator set. The impeller can meet the performance requirements of the wind turbine generator set, while also being highly stable and inexpensive.

[0005] On one hand, according to an embodiment of the present invention, an impeller is provided, comprising: a hub having a rotation axis; blades, two or more blades being spaced apart around the rotation axis and respectively connected to the hub; and connecting cables, wherein at least two adjacent blades are connected by connecting cables, and the tension of the connecting cables acting on the connected blades is adjustable.

[0006] According to one aspect of the present invention, the impeller further includes a winding member, at least one blade is provided with the winding member and connected to a connecting cable via the winding member, the winding member being configured to wind or release the connecting cable to adjust the tension of the connecting cable acting on the connected blade.

[0007] According to one aspect of the present invention, the winding component includes a drive unit and a winding roller, the winding roller being connected to a connecting cable, and the drive unit being capable of driving the winding roller to rotate in order to wind or release the connecting cable.

[0008] According to one aspect of the present invention, at least two connecting cables are connected between each pair of adjacent blades, and the connecting cables between the two adjacent blades are arranged crosswise or at intervals.

[0009] According to one aspect of the present invention, each blade has a first connecting position and a second connecting position spaced apart along its own axial direction. The first connecting position is located on the side closer to the hub in the axial direction. In two adjacent blades, a connecting cable connects the first connecting position of each blade to the second connecting position of the other blade.

[0010] According to one aspect of the present invention, the blade includes a blade body and a transition component. The transition component includes a first guide rail and a movable member movably connected to the first guide rail. The first guide rail is connected to the blade body, and a connecting cable is connected to the movable member.

[0011] According to one aspect of the present invention, a first guide rail extends a predetermined length around the axis of the blade on the outer periphery of the blade body.

[0012] According to one aspect of the present invention, the blade body has a leading edge and a trailing edge along the chord direction of the blade, and a windward side and a leeward side along the thickness direction of the blade; a first guide rail covers at least a portion of the windward side, and / or the first guide rail covers at least a portion of the leading edge.

[0013] According to one aspect of the present invention, the first guide rail is a closed loop structure; or, the first guide rail is an arc-shaped structure.

[0014] According to one aspect of the present invention, the adapter further includes a second guide rail, which is spaced apart from the first guide rail along the axial direction of the blade. The first guide rail is provided with meshing teeth. The moving part includes a power source, a transmission wheel connected to the power source, and a mounting position. The transmission wheel is in transmission engagement with the meshing teeth, and the power source can drive the transmission wheel to rotate. The connecting cable is connected to the mounting position, and the power source and the second guide rail are movably connected.

[0015] According to one aspect of the present invention, along the axial direction of the blade, the blade body includes a first segment and a second segment spaced apart, and a first guide rail is a closed annular structure connected between the first segment and the second segment.

[0016] According to one aspect of the present invention, along the chord direction of the blade, the blade body has a leading edge and a trailing edge; the curvature of the region corresponding to the first guide rail of the trailing edge is greater than the curvature of other regions of the trailing edge; and / or, in the thickness direction of the blade, the thickness dimension of the region corresponding to the first guide rail of the trailing edge is greater than the thickness dimension of other regions of the trailing edge.

[0017] According to one aspect of the present invention, the impeller further includes a collector and a controller; the collector is configured to collect at least one of motion information and deformation information of the blades, and the controller is configured to control a moving member based on the motion information and / or deformation information, such that the moving member moves or locks along a first guide rail.

[0018] According to one aspect of the present invention, the connecting cable includes a steel wire rope or carbon fiber.

[0019] In another aspect, according to an embodiment of the present invention, a wind turbine generator set is provided, including the rotor described above.

[0020] According to the embodiments of the present invention, the impeller and wind turbine generator set include a hub, blades, and connecting cables. Two or more blades are spaced apart around the rotation axis of the hub and connected to the hub. Wind energy acts on the surface of the blades, driving the hub to rotate and converting wind energy into the kinetic energy of the impeller. The kinetic energy of the blades can then be further converted into electrical energy by the generator. Since at least two adjacent blades are connected by connecting cables, the tension of the connecting cables on the connected blades is adjustable. That is, the connecting cables can connect at least two blades into a whole, and the tension of the connecting cables on the blades can be adjusted to a predetermined value. This allows each blade connected to the connecting cables to be subjected to tension in the impeller surface, limiting in-plane deformation, reducing blade torsional load, ensuring blade operational stability, and thus improving the safety performance of the impeller. Furthermore, by adding connecting cables to improve blade stability, the overall cost of the impeller can be kept low. Attached Figure Description

[0021] The features, advantages and technical effects of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the structure of a wind turbine generator set according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the impeller structure according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the engagement between the winding component and the blade according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of a winding component according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the impeller structure according to another embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the impeller structure according to another embodiment of the present invention;

[0028] Figure 7 This is a partial cross-sectional view of the impeller according to another embodiment of the present invention;

[0029] Figure 8 yes Figure 7 A partial structural schematic diagram of the impeller in the illustrated embodiment;

[0030] Figure 9 This is a partial structural schematic diagram of a blade according to an embodiment of the present invention;

[0031] Figure 10 This is a partial cross-sectional view of the impeller according to another embodiment of the present invention;

[0032] Figure 11 This is a partial cross-sectional view of the impeller according to another embodiment of the present invention;

[0033] Figure 12 This is a partial cross-sectional view of the impeller according to another embodiment of the present invention;

[0034] Figure 13 yes Figure 12 A partial structural schematic diagram of the impeller in the embodiment shown.

[0035] in:

[0036] 100-Impeller;

[0037] 10-Hub; 11-Main shaft hole; 12-Connecting hole;

[0038] 20 - Blade; 20a - First connection position; 20b - Second connection position;

[0039] 21-Blade body; 211-First section; 212-Second section; 21a-Leading edge; 21b-Leading edge; 21c-Windward side; 21d-Leftward side;

[0040] 22-Transfer component; 221-First guide rail; 222-Moving component; 222a-Power source; 222b-Transmission wheel; 222c-Mounting position; 223-Second guide rail;

[0041] 30-Connecting cable;

[0042] 40 - Winding component; 41 - Drive unit; 42 - Winding roller;

[0043] 200 - Tower; 300 - Nacelle;

[0044] X - Axial direction; Y - Chordal direction; Z - Thickness direction; aa - Rotation axis.

[0045] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0048] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0051] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application. The term "multiple" in this application refers to two or more (including two).

[0052] Please refer to Figure 1 This invention provides a wind turbine generator set, including a tower 200, a nacelle 300, a generator (not shown), and an impeller 100. The tower 200 is connected to a wind turbine foundation, the nacelle 300 is mounted on the tower 200, and the impeller 100 is mounted on the nacelle 300 and can rotate relative to the nacelle 300 under the action of wind. The generator can be connected between the impeller 100 and the nacelle base. The impeller 100 includes a hub 10 and blades 20. The impeller 100 is connected to the rotor of the generator through the hub 10. Under the action of wind energy, the blades 20 can drive the hub 10 to rotate, thereby driving the rotor of the generator to rotate relative to the stator, enabling the wind turbine generator set to convert wind energy into electrical energy.

[0053] As the power requirements of wind turbine generator sets continue to increase, the length of the blades 20 included in the impeller 100 is also getting longer and longer. The increase in the length of the blades 20 leads to a gradual increase in the load on the blades 20, mainly torsional load. The increase in torsional load poses a hidden danger to the stability of the blades 20, making them prone to instability. Consequently, the impeller 100 as a whole has poor stability and poses a safety hazard.

[0054] To address the aforementioned issues, this invention also provides an impeller 100 that meets the power generation requirements of wind turbine generator sets, while exhibiting high stability and low cost. The impeller 100 provided in this invention can be manufactured or sold independently as a standalone product, or it can be used in the wind turbine generator sets provided in the above embodiments as a component of the wind turbine generator sets.

[0055] To better understand the impeller 100 provided in the embodiments of the present invention, the following will be combined with Figures 2 to 13 The impeller 100 provided in the embodiments of the present invention will be described in detail.

[0056] Please refer to the above as well. Figure 1 as well as Figure 2The impeller 100 provided in this embodiment of the invention includes a hub 10, blades 20, and connecting cables 30. The hub 10 has a rotation axis aa, and two or more blades 20 are spaced apart around the rotation axis aa and connected to the hub 10 respectively. At least two adjacent blades 20 are connected by connecting cables 30, and the tension of the connecting cables 30 on the connected blades 20 is adjustable.

[0057] The impeller 100 provided in this embodiment of the invention, when used in a wind turbine generator set, is connected to the rotor of the generator via a hub 10. Wind energy acts on the surface of the blades 20, which in turn drives the hub 10 to rotate, converting the wind energy into the kinetic energy of the impeller 100. This kinetic energy can then be further converted into electrical energy by the generator.

[0058] Generally speaking, wind shear exists along the vertical direction of a wind turbine generator. That is, in the vertical direction, the higher the wind speed is above the ground, the greater the wind speed, and vice versa. During the rotation of the rotor 100, the time-series load on the blade 20 varies in a sine or cosine manner. The blade 20 bears the greatest load when it rotates to the top and the least load when it rotates to the bottom. The impeller 100 provided in this embodiment of the invention connects at least two adjacent blades 20 to form a whole via connecting cables 30. The tension exerted by the connecting cables 30 on the connected blades 20 is adjustable. That is, the connecting cables 30 can connect at least two blades 20 into a whole, and the tension exerted by the connecting cables 30 on the blades 20 can be adjusted to a predetermined value. This makes the load on each blade 20 connected to the connecting cables 30 under tension within the impeller 100 surface more uniform, reducing the amplitude of the sine or cosine load and the maximum load borne by the blades 20. It also appropriately limits the displacement of deformation or disturbance within the impeller 100 plane, reduces torsional load, ensures the operational stability of the blades 20, and thus improves the safety performance of the impeller 100. Furthermore, the reduction in maximum load allows for a reduction in the design weight of the blades 20, lowering their cost and making them less expensive.

[0059] Optionally, the hub 10 has an inner cavity, a main shaft hole 11, and a plurality of connecting holes 12, which are respectively connected to the inner cavity of the hub 10. The axis of the main shaft hole 11 is the rotation axis aa of the hub 10, and each connecting hole 12 is disposed opposite to one of the blades 20, forming a sidewall that is connected to the blade 20.

[0060] Optionally, the blade 20 and the hub 10 can be interconnected through a pitch system, which allows the blade 20 to rotate relative to the hub 10 according to parameters such as wind direction and wind speed in the area where the wind turbine is located, so as to ensure the maximum wind energy capture requirement.

[0061] Optionally, the number of blades 20 can be two, three or even more. To better understand the impeller 100 provided in the embodiments of the present invention, the following will be an example of three blades 20.

[0062] Optionally, the connecting cable 30 has two opposing ends along its length. One end of the connecting cable 30 can be wrapped around one of the two adjacent blades 20 and folded back to be knotted and fixed to the remaining portion between the two ends of the connecting cable 30. The other end of the connecting cable 30 can be wrapped around the other of the two adjacent blades 20 and folded back to be knotted and fixed to the remaining portion between the two ends of the connecting cable 30. When it is necessary to adjust the tension of the connecting cable 30 on the blade 20, it can be adjusted by adjusting the knot position of each end of the connecting cable 30 to the remaining portion between the two ends of the connecting cable 30. Of course, the above connection method between the connecting cable 30 and the two adjacent blades 20 is only one optional embodiment, but is not limited to the above method. Any method that can meet the connection and tension adjustment requirements between the connecting cable 30 and the blade 20 is acceptable.

[0063] Optionally, the impeller 100 provided in this embodiment of the invention can be configured such that a connecting cable 30 connects two adjacent blades 20 in a group of multiple blades 20. Alternatively, a connecting cable 30 can be connected between every two adjacent blades 20 in the two or more blades included in the impeller 100. For example, when there are three blades 20, a connecting cable can be connected between every two adjacent blades in the three blades.

[0064] Optionally, the number of connecting cables 30 connecting two adjacent blades 20 can be one or more, depending on the connection strength requirements.

[0065] Please refer to Figure 3 as well as Figure 4 As an optional implementation, the impeller 100 provided in this embodiment of the invention further includes a winding member 40. At least one blade 20 is provided with the winding member 40 and is connected to the connecting cable 30 through the winding member 40. The winding member 40 is configured to wind or release the connecting cable 30 to adjust the tension of the connecting cable 30 on the connected blade 20.

[0066] The impeller 100 provided in this embodiment of the invention has a winding member 40 provided on at least one blade 20, so that the connecting cable 30 is connected to the blade 20 through the winding member 40. When it is necessary to adjust the tension of the connecting cable 30 on the blade 20, the tension acting on the blade 20 can be adjusted by winding or releasing the connecting cable 30.

[0067] For example, based on the collected wind direction and / or wind speed parameters, when it is necessary to increase the tension of the connecting cable 30 on the blade 20, the connecting cable 30 can be wound by the winding component 40, thereby reducing the length of the connecting cable 30 between two adjacent blades 20, and thus increasing the tension of the connecting cable 30 on the blade 20. Conversely, when it is necessary to decrease the tension of the connecting cable 30 on the blade 20, the connecting cable 30 can be released by the winding component 40, thereby increasing the length of the connecting cable 30 between two adjacent blades 20, and thus decreasing the tension of the connecting cable 30 on the blade 20.

[0068] Optionally, the winding member 40 can be connected to the blade 20. One end of the connecting cable 30 can be indirectly connected to the blade 20 via the winding member 40.

[0069] Optionally, each connecting cable 30 may correspond to a winding member 40, which is located on one of the two adjacent blades 20 to which the connecting cable 30 is connected.

[0070] As an optional implementation, the impeller 100 provided in this embodiment of the invention has a winding component 40 including a drive unit 41 and a winding roller 42. The winding roller 42 is connected to the connecting cable 30. The drive unit 41 can drive the winding roller 42 to rotate in order to wind or release the connecting cable 30.

[0071] Optionally, the winding component 40 can be connected to the blade 20 via the drive unit 41 and to the connecting cable 30 via the winding roller 42. One end of the connecting cable 30 can be arranged around the axis of the winding roller 42 and connected to the winding roller, so that the connecting cable 30 can be wound around the axis of the winding roller 42. The drive unit 41 can be a motor, and the output shaft of the drive unit 41 is connected to the winding roller 42. The drive unit 41 can drive the winding roller 42 to rotate forward or backward, thereby realizing the winding or unwinding of the connecting cable 30.

[0072] Please refer to Figure 5 In some optional embodiments, the impeller 100 provided by the present invention has at least two connecting cables 30 connecting each pair of adjacent blades 20. The connecting cables 30 located between adjacent blades 20 are arranged crosswise or at intervals. By connecting at least two connecting cables 30 between each pair of adjacent blades 20, the integrity between each blade 20 can be further enhanced, increasing the tension on each blade 20 within the impeller 100 surface, further limiting in-plane deformation, reducing the torsional load on the blades 20, and improving the operational stability of the blades 20.

[0073] Please refer to Figure 6As an optional implementation, the impeller 100 provided in this embodiment of the invention has each blade 20 having a first connecting position 20a and a second connecting position 20b spaced apart along its own axial direction X. The first connecting position 20a is located on the side closer to the hub 10 in the axial direction X. In two adjacent blades 20, a connecting cable 30 is connected between the first connecting position 20a of each blade 20 and the second connecting position 20b of the other blade 20.

[0074] With the above configuration, the length of the connecting cable 30 can be reduced while ensuring the required connection strength between the connecting cable 30 and the two adjacent blades 20. For example, if the second connecting position 20b in each pair of adjacent blades 20 is connected by the connecting cable 30, even if the same effect as the above embodiment can be achieved, the length of the connecting cable 30 will increase, resulting in higher costs.

[0075] Please refer to Figure 7 as well as Figure 8 Since the impeller 100 is used in the wind power generation process for wind energy conversion, in order to better capture wind energy, the blades 20 need to rotate relative to the hub 10 through the action of the pitch system to achieve pitch control. Therefore, in order to achieve the pitch control requirement of the blades 20 relative to the hub 10, as an optional implementation, the impeller 100 provided in this embodiment of the invention includes a blade body 21 and a transition component 22. The transition component 22 includes a first guide rail 221 and a movable member 222 movably connected to the first guide rail 221. The first guide rail 221 is connected to the blade body 21, and the connecting cable 30 is connected to the movable member 222.

[0076] The blade 20 can be connected to the hub 10 via the blade body 21. Since the adapter 22 includes a first guide rail 221 and a movable part 222 movably connected to the first guide rail 221, when the blade body 21 rotates relative to the hub 10 during pitch control, it can drive the first guide rail 221 to rotate. Since the movable part 222 is movably connected to the first guide rail 221 and the connecting cable 30 is connected to the movable part 222, the connecting cable 30 will not affect the rotation of the blade body 21. This ensures that at least two blades 20 are connected as a whole via the connecting cable 30, while also ensuring the pitch control requirements of the blade 20 relative to the hub 10 and meeting the maximum wind energy capture.

[0077] Optionally, the blade body 21 may include a housing and a web disposed inside the housing, and the first guide rail 221 of the adapter 22 may be connected to the outer surface of the housing of the blade body 21.

[0078] Optionally, the first guide rail 221 may extend a predetermined length along the rotational direction of the blade body 21 relative to the hub 10.

[0079] In some alternative embodiments, the first guide rail 221 extends a predetermined length around the axis of the blade 20 on the outer periphery of the blade body 21. Since the blade 20 typically rotates around its axis during pitch control, extending the first guide rail 221 a predetermined length around the axis of the blade 20 on the outer periphery of the blade body 21 ensures smooth movement of the moving member 222 along the first guide rail 221 during the rotation of the blade 20 relative to the hub 10.

[0080] As an alternative implementation, along the chord Y direction of the blade 20, the blade body 21 has a leading edge 21a and a trailing edge 21b, and along the thickness Z direction of the blade 20, the blade body 21 has a windward surface 21c and a leeward surface 21d; the first guide rail 221 covers at least a portion of the windward surface 21c, and / or the first guide rail 221 covers at least a portion of the leading edge 21a.

[0081] Since the blade 20 typically involves pitching to 90° or pitching to 0° during pitch control, meaning that the rotation angle of the blade 20 relative to the hub 10 during pitch control is approximately between 0° and 90°, by covering at least part of the windward surface 21c with the first guide rail 221 and / or covering at least part of the leading edge 21a with the first guide rail 221, the pitch range of the blade 20 can be accommodated while reducing the extension length of the first guide rail 221, thus avoiding interference of the connecting cable 30 with the pitch control action of the blade 20.

[0082] Since the connecting cable 30 needs to connect two adjacent blades 20 and provide tension to the blades 20 to connect the two adjacent blades 20 into a whole, in order to ensure the tension requirement of the connecting cable 30 on each blade 20, optionally, in the embodiment of the present invention, after the moving part 222 of the blade 20 moves to the predetermined position of the first guide rail 221, the relative position of the moving part 222 and the first guide rail 221 is locked, thereby ensuring that the tension requirement of the connecting cable 30 on the connected blade 20 is necessary.

[0083] Therefore, please continue to refer to 7 and Figure 8 As an optional implementation, the adapter 22 further includes a second guide rail 223, which is spaced apart from the first guide rail 221 along the axial direction X of the blade 20. The first guide rail 221 is provided with meshing teeth. The moving part 222 includes a power source 222a, a transmission wheel 222b connected to the power source 222a, and a mounting position 222c. The transmission wheel 222b is in transmission engagement with the meshing teeth, and the power source 222a can drive the transmission wheel 222b to rotate. The connecting cable 30 is connected to the mounting position 222c, and the power source 222a and the second guide rail 223 are movably connected.

[0084] With the above configuration, the power source 222a can drive the transmission wheel 222b to rotate. Since the first guide rail 221 has meshing teeth, the transmission wheel 222b engages with these teeth, causing it to move along the first guide rail 221. This, in turn, drives the power source 222a to move along the second guide rail 223, fulfilling the movement requirements of the moving component 222. When the moving component 222 reaches a predetermined position, the power source 222a stops operating, and the transmission wheel 222b engages and locks with the meshing teeth in the first guide rail 221. This achieves relative position locking between the moving component 222 and the first guide rail 221.

[0085] As an alternative implementation, the power source 222a can be a drive motor. Optionally, one of the power source 222a and the second guide rail 223 can be at least partially inserted into the interior of the other and engaged to ensure the reliability of the connection between the two and prevent them from separating during relative movement.

[0086] Optionally, multiple spaced balls can be provided in the second guide rail 223 so that the friction between the power source 222a and the second guide rail 223 is rolling friction, ensuring the smoothness of the power source 222a when it moves with the transmission wheel 222b relative to the second guide rail 223.

[0087] As an optional implementation, the impeller 100 provided in this embodiment of the invention has a first guide rail 221 that can be a closed loop structure. That is, the first guide rail 221 can extend around the blade body 21 along the chord Y direction of the blade 20 to form a closed loop structure. This arrangement allows the moving part 222 to have a wider range of movement relative to the first guide rail 221, which helps to ensure the smoothness of the blade 20 pitching.

[0088] When the first guide rail 221 is a closed ring structure, the blade body 21 can be an integral structure, with the first guide rail 221 connected to the outer surface of the outer shell of the blade body 21. Of course, this is an optional implementation method, but it is not limited to the above method.

[0089] Please refer to Figure 9 In some embodiments, the blade body 21 may include a first segment 211 and a second segment 212 spaced apart along the axial direction X of the blade 20, with the first guide rail 221 forming a closed annular structure and connecting the first segment 211 and the second segment 212. This configuration also satisfies the large-range movement requirements of the moving component 222. Furthermore, this method allows the first guide rail 221 to be configured as a circular or near-circular track, further ensuring the smooth movement of the moving component 222.

[0090] Please refer to Figure 10It is understandable that the first guide rail 221 adopting a closed ring structure is only an optional implementation method. In some embodiments, the first guide rail 221 can also be an arc-shaped structure, as long as it can meet the connection requirements between the connecting cable 30 and the blade 20, and at the same time ensure the pitch requirement of the blade 20 relative to the hub 10.

[0091] Please refer to Figure 11 In some optional embodiments, the impeller 100 provided by the present invention has a greater arc in the region corresponding to the trailing edge 21b and the first guide rail 221 than in other regions of the trailing edge 21b. And / or, in the thickness direction Z of the blade 20, the thickness dimension of the region corresponding to the trailing edge 21b and the first guide rail 221 is greater than the thickness dimension of other regions of the trailing edge 21b.

[0092] By making the curvature of the area corresponding to the trailing edge 21b and the first guide rail 221 greater than the curvature of other areas of the trailing edge 21b, and by making the thickness dimension of the area corresponding to the trailing edge 21b and the first guide rail 221 greater than the thickness dimension of other areas of the trailing edge 21b in the thickness direction Z of the blade 20, it is possible to flatten the area corresponding to the blade body 21 and the first guide rail 221 to prevent the positions of the connecting cable 30 and the trailing edge 21b from interfering with each other.

[0093] Reference Figure 12 as well as Figure 13 As shown, as an optional implementation, the impeller 100 provided in this embodiment of the invention, when including both a winding component 40 and a connecting component 22, allows the winding component 40 to be connected between the connecting cable 30 and the connecting component 22. That is, the connecting cable 30 can be connected to the blade body 21 in sequence through the winding component 40 and the connecting component 22.

[0094] In some alternative embodiments, when one of the two adjacent blades 20 is provided with a winding member 40, when the connecting cable 30 connects the two adjacent blades 20, one end of the connecting cable 30 can be directly connected to the mounting position 222c on the power source 222a of one of the two blades 20, and the other end of the connecting cable 30 can be connected to the mounting position 222c on the power source 222a of the other of the two blades 20 through the adapter member 22.

[0095] Optionally, the drive unit 41 of the winding component 40 and the power source 222a of the adapter component 22 can be connected in a fixed manner, such as by welding. Of course, a detachable connection can also be used, such as by bolt locking.

[0096] Optionally, when each of two adjacent blades 20 is provided with a winding member 40, when the connecting cable 30 connects two adjacent blades 20, each end of the connecting cable 30 can be connected to the mounting position 222c on the power source 222a of the corresponding blade 20 through the adapter member 22.

[0097] When the blade 20 includes the adapter 22 and also has a winding component 40, the tension of the connecting cable 30 on the blade 20 can be adjusted by the winding component 40, and the winding component 40 can be moved along the extension trajectory of the first guide rail 221 by the moving component 222 to ensure the pitch requirement of the blade 20.

[0098] As an optional implementation, the impeller 100 provided in this embodiment of the invention further includes a collector and a controller; the collector is configured to collect at least one of the motion information and deformation information of the blade 20, and the controller is configured to control the moving member 222 according to the motion information and / or deformation information, so that the moving member 222 moves or locks along the first guide rail 221.

[0099] By including a collector and a controller in the impeller 100, the moving part 222 can be automatically controlled to obtain information on the movement or deformation of the blade 20, thus ensuring the tension required by the connecting cable 30 on the blade 20.

[0100] The motion information includes the pitch information of the blade 20, and the deformation information includes parameters such as the deformation of the blade body 21 of the blade 20 under the action of wind energy or external factors.

[0101] For example, when the collector needs to adjust the pitch of the blade 20, the controller controls the power source 222a according to the pitch direction and the rotation angle of the blade 20, so that the power source 222a drives the transmission wheel 222b to rotate, thereby driving the winding component 40 and the connecting cable 30 to move according to the pitch direction of the blade 20, ensuring the smoothness of the pitch adjustment, and at the same time ensuring the tension required by the connecting cable 30 on the blade 20.

[0102] For example, when the collector collects the deformation of the outer shell of the blade 20, such as inward indentation, the controller can control the power source 222a according to the deformation information of the blade 20, so that the power source 222a drives the transmission wheel 222b to rotate, thereby driving the winding component 40 and the connecting cable 30 to move closer to or away from the deformation position, so as to avoid the moving part 222 from getting stuck during the movement due to the deformation of the blade 20.

[0103] Optionally, the data collector and controller can be set up separately, or they can be integrated into the main control area of ​​the wind turbine generator.

[0104] Optionally, when the impeller 100 provided in the embodiments of the present invention includes a winding component 40, its collector can also be configured to collect the tension of the connecting cable 30, and the controller can also be configured to control the drive component according to the tension of the connecting cable 30 collected by the collector, so as to automatically control the winding or unwinding of the connecting cable 30, thereby realizing automatic control of the tension of the connecting cable 30 on the impeller 100.

[0105] As an optional implementation, the impeller 100 provided in the above embodiments of the present invention may have a steel wire rope as its connecting cable 30. Of course, this is an optional implementation. In some embodiments, the connecting cable 30 may also be a rope structure including carbon fiber, as long as it can meet the tension requirements of the blade 20.

[0106] The impeller 100 provided in this embodiment of the invention connects at least two blades 20 together via connecting cables 30. This allows each blade 20 to be subjected to tension within the impeller 100 surface, appropriately limiting in-plane deformation, reducing torsional load on the blades 20, and improving operational stability. Furthermore, the tension of the connecting cables 30 causes the blades 20 to interact, reducing the load amplitude on the blades 20, lowering their ultimate load and fatigue load, thereby improving the safety performance of the impeller 100. Additionally, the connecting cables 30 reduce the design weight of the blades 20, lowering costs. The wind turbine generator set provided in this embodiment of the invention, because it includes the impeller 100 provided in the above embodiments, possesses high stability and safety performance, ensuring its power generation efficiency.

[0107] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An impeller (100), characterized in that, include: The hub (10) has a rotation axis (aa); Blades (20), two or more blades (20) are spaced apart around the rotation axis (aa) and are respectively connected to the hub (10); A connecting cable (30) is used to connect at least two adjacent blades (20) of two or more blades (20), and the tension of the connecting cable (30) acting on the connected blades (20) is adjustable; The blade (20) includes a blade body (21) and a connecting component (22). The connecting component (22) includes a first guide rail (221) and a movable member (222) movably connected to the first guide rail (221). The first guide rail (221) is connected to the blade body (21), and the connecting cable (30) is connected to the movable member (222). The first guide rail (221) is a closed loop structure; or, the first guide rail (221) is an arc-shaped structure.

2. The impeller (100) according to claim 1, characterized in that, The impeller (100) further includes a winding member (40), at least one of the blades (20) is provided with the winding member (40) and is connected to the connecting cable (30) through the winding member (40), the winding member (40) being configured to wind or release the connecting cable (30) to adjust the tension of the connecting cable (30) acting on the connected blade (20).

3. The impeller (100) according to claim 2, characterized in that, The winding component (40) includes a drive unit (41) and a winding roller (42), the winding roller (42) being connected to the connecting cable (30), and the drive unit (41) being able to drive the winding roller (42) to rotate in order to wind or unwind the connecting cable (30).

4. The impeller (100) according to claim 1, characterized in that, At least two connecting cables (30) are connected between each two adjacent blades (20), and the connecting cables (30) between two adjacent blades (20) are arranged crosswise or at intervals.

5. The impeller (100) according to claim 1, characterized in that, Each blade (20) has a first connection position (20a) and a second connection position (20b) spaced apart along its own axial direction (X). The first connection position (20a) is located on the side closer to the hub (10) along the axial direction (X). In two adjacent blades (20), the first connection position (20a) of each blade (20) is connected to the second connection position (20b) of the other blade (20) by the connecting cable (30).

6. The impeller (100) according to claim 1, characterized in that, The first guide rail (221) extends a predetermined length around the axis of the blade (20) on the outer periphery of the blade body (21).

7. The impeller (100) according to claim 6, characterized in that, Along the chord direction (Y) of the blade (20), the blade body (21) has a leading edge (21a) and a trailing edge (21b), and along the thickness direction (Z) of the blade (20), the blade body (21) has a windward side (21c) and a leeward side (21d). The first guide rail (221) covers at least a portion of the windward surface (21c), and / or the first guide rail (221) covers at least a portion of the leading edge (21a).

8. The impeller (100) according to claim 1, characterized in that, The adapter (22) further includes a second guide rail (223), which is spaced apart from the first guide rail (221) along the axial (X) direction of the blade (20). The first guide rail (221) is provided with meshing teeth. The moving part (222) includes a power source (222a), a transmission wheel (222b) connected to the power source (222a), and a mounting position (222c). The transmission wheel (222b) is in transmission engagement with the meshing teeth. The power source (222a) can drive the transmission wheel (222b) to rotate. The connecting cable (30) is connected to the mounting position (222c). The power source (222a) and the second guide rail (223) are movably connected.

9. The impeller (100) according to claim 1, characterized in that, Along the axial direction (X) of the blade (20), the blade body (21) includes a first segment (211) and a second segment (212) spaced apart, and the first guide rail (221) is a closed ring structure connected between the first segment (211) and the second segment (212).

10. The impeller (100) according to claim 1, characterized in that, Along the chord (Y) of the blade (20), the blade body (21) has a leading edge (21a) and a trailing edge (21b); The curvature of the area corresponding to the trailing edge (21b) and the first guide rail (221) is greater than the curvature of other areas of the trailing edge (21b); And / or, in the thickness direction (Z) of the blade (20), the thickness dimension of the region corresponding to the trailing edge (21b) and the first guide rail (221) is greater than the thickness dimension of other regions of the trailing edge (21b).

11. The impeller (100) according to claim 1, characterized in that, The impeller (100) also includes a collector and a controller; The collector is configured to collect at least one of the motion information and deformation information of the blade (20), and the controller is configured to control the moving member (222) according to the motion information and / or the deformation information, so that the moving member (222) moves or locks along the first guide rail (221).

12. The impeller (100) according to claim 1, characterized in that, The connecting cable (30) includes a steel wire rope or a carbon fiber rope.

13. A wind turbine generator set, comprising an impeller (100) as described in any one of claims 1 to 12.

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