Novel wind turbine generator

Abstract

The invention relates to the technical field of wind power generation equipment, and provides a novel wind turbine generator which comprises a main tower, a plurality of branch towers and a plurality of impellers, one end of each branch tower is connected with the main tower, and the branch towers are arranged at included angles; each impeller is arranged at the end, away from the main tower, of the corresponding branch tower, and the multiple impellers are arranged in at least two different directions. According to the novel wind turbine generator, the main tower is matched with the branch towers arranged at the included angle, and the impellers facing different directions are arranged at the tail ends of the branch towers, so that the problems that the space utilization rate of a traditional single tower structure is low, and cooperative work of multiple impellers is difficult are solved; the impeller has the advantages of improving the space utilization rate, enhancing the structural stability, facilitating transportation and hoisting and achieving cooperative work of multiple impellers.

Description

Technical Field

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

[0002] With the rapid development of the wind power industry, the diameter of impellers, both onshore and offshore, is showing an increasing trend. This development trend poses a huge challenge to the transportation and hoisting of blades. As the power level of the unit continues to increase, simply increasing the size of the impeller not only leads to bottlenecks in the design and analysis methods, but also brings many practical application problems: including increased difficulty in blade manufacturing, higher requirements for component processing accuracy, increased risks in the transportation process, and increased complexity in hoisting operations. These problems seriously restrict the development and application of large-scale wind turbines. Traditional single-tower wind turbines have problems such as insufficient structural stability and low space utilization when faced with multi-impeller configurations. There is an urgent need to develop new structural solutions to break through these technical bottlenecks. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes a new type of wind turbine that has the advantages of improving space utilization, enhancing structural stability, facilitating transportation and hoisting, and realizing the coordinated operation of multiple impellers.

[0004] The novel wind turbine generator set according to the first embodiment of the present invention comprises: main tower; A plurality of sub-towers, one end of each sub-tower being connected to the main tower, and the plurality of sub-towers being arranged at an angle to each other; A plurality of impellers are provided, each impeller being arranged at one end of a sub-tower away from the main tower, and the plurality of impellers are arranged facing at least two different directions.

[0005] According to the new wind turbine generator set of the embodiment of the present invention, the main tower is matched with multiple sub-towers arranged at an angle, and impellers with different directions are arranged at the ends of the sub-towers, thereby solving the problems of low space utilization and difficulty in coordinated operation of multiple impellers in the traditional single-tower structure. It has the advantages of improving space utilization, enhancing structural stability, facilitating transportation and lifting, and realizing coordinated operation of multiple impellers.

[0006] According to one embodiment of the present invention, the angles between the plurality of sub-towers range from 30 degrees to 90 degrees.

[0007] According to one embodiment of the present invention, the novel wind turbine generator set includes a plurality of first connection structures, each of which connects two adjacent sub-towers.

[0008] According to one embodiment of the present invention, the novel wind turbine generator system includes a plurality of second connecting structures, each of which connects two adjacent sub-towers. The second connecting structures and the first connecting structures are spaced apart in the length direction of the sub-towers.

[0009] According to one embodiment of the present invention, the first connecting structure is a first cable, and a plurality of the first cables are in the same plane; And / or, the second connecting structure is a second cable, and a plurality of the second cables are in the same plane.

[0010] According to one embodiment of the present invention, the plurality of sub-towers include a first sub-tower and two second sub-towers; The length of the first sub-tower is longer than that of the second sub-tower, or the length of the second sub-tower is longer than that of the first sub-tower.

[0011] According to one embodiment of the present invention, the impeller provided on the first sub-tower is a first impeller, the impeller provided on the second sub-tower is a second impeller, and the first impeller and the second impeller face opposite directions.

[0012] According to one embodiment of the present invention, the two second impellers rotate in the same plane.

[0013] According to one embodiment of the present invention, the rotation plane of the impeller is arranged at an angle to the axis of the sub-tower.

[0014] According to one embodiment of the present invention, the sub-tower is connected to the main tower via a yaw bearing.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of a new wind turbine generator set provided by an embodiment of the present invention.

[0018] Figure 2 It is a side view of a new wind turbine generator set provided by an embodiment of the present invention.

[0019] Figure 3 It is a front view of a new wind turbine generator set provided by an embodiment of the present invention.

[0020] Reference numerals: 1. Main tower; 2. Sub-tower; 21. First sub-tower; 22. Second sub-tower; 3. Impeller; 31. First impeller; 32. Second impeller; 4. First connecting structure; 5. Second connecting structure. DETAILED DESCRIPTION

[0021] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0024] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0025] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0026] In existing technologies, with the rapid development of the wind power industry, the increasing diameter of the impeller 3 has led to difficulties in transportation, lifting, and design and manufacturing. Traditional wind turbines utilize a single, large impeller 3. When the impeller 3 diameter exceeds a certain size, existing lifting equipment is unable to meet installation requirements. This exacerbates the conflict between material strength and structural stability during blade manufacturing. Furthermore, road width and height restrictions during transportation also restrict further expansion of the impeller 3 size.

[0027] Therefore, if Figure 1 As shown, the present application proposes a structure including a main tower 1, multiple sub-towers 2 and an impeller 3. One end of the sub-tower 2 is connected to the main tower 1 and they are arranged at an angle to each other. An impeller 3 is arranged at the end of each sub-tower 2, and the multiple impellers 3 face at least two different directions.

[0028] The main tower 1 is a vertically erected support structure, typically constructed using a steel truss or concrete cylinder, serving as the load-bearing core of the entire unit. Subtowers 2 extend from the main tower 1 and can be constructed using variable-section steel pipes or spatial trusses. Their axes form a non-zero angle with the main tower 1, distributing the positions of the impellers 3. The angle setting refers to the spatial angular relationship between the subtowers 2, which can be achieved through a three-dimensional spatial layout design to ensure that the rotation planes of the impellers 3 do not interfere with each other.

[0029] Specifically, the main tower 1 serves as the central support point to bear the loads of all sub-towers 2, and the sub-towers 2 are radially distributed to form a stable triangular spatial structure. The impeller 3 at the end of each sub-tower 2 operates independently, and the manufacturing difficulty is reduced by reducing the diameter of a single impeller 3. The angle design between the sub-towers 2 not only ensures a safe distance between the impellers 3, but also forms a mutually supporting mechanical system. When the impellers 3 are arranged in multiple directions, different impellers 3 can capture wind energy from different directions. When encountering strong winds, the difference in the force direction of each impeller 3 can partially offset the torque borne by the overall structure.

[0030] Compared to existing technologies, which traditionally use a single tower to support a single large impeller (3), this solution uses a distributed structure to break down the total power demand into multiple smaller impellers (3), allowing the diameter of a single impeller (3) to be controlled within the capabilities of existing transportation and lifting equipment. The angled layout of the sub-towers (2) avoids airflow interference between the multiple impellers (3), while the resulting spatial truss structure enhances overall wind resistance. The multi-directional impeller (3) configuration overcomes the traditional limitation of unidirectional wind exposure and improves energy capture efficiency in complex wind environments.

[0031] Through the above technical solution, this application effectively reduces the size requirements of a single impeller 3, eliminating the need to exceed the strength limits of existing materials in blade manufacturing. Overrun issues can be addressed during transportation by transporting the impellers separately, and standard equipment can be used for segmented installation during hoisting. The sub-tower 2 structure lowers the overall center of gravity of the unit, enhancing structural stability. The coordinated operation of multiple impellers 3 also enables redundant power generation, maintaining basic power generation capacity even if some impellers 3 fail.

[0032] The present application further proposes that the angles between the multiple sub-towers 2 range from 30 degrees to 90 degrees.

[0033] The angle between the sub-towers 2 refers to the spatial distribution angle of the axis of the sub-towers 2 at the connection point with the main tower 1. This can be achieved by adjusting the connection angle between the sub-towers 2 and the main tower 1 or using prefabricated angle adapters. This angle range, by limiting the spatial distribution of the sub-towers 2, ensures structural compactness while avoiding installation interference caused by too small an angle or support force dispersion caused by too large an angle.

[0034] Specifically, when the angle between the sub-towers 2 is set to 30 to 90 degrees, the sub-towers 2 can form a uniform and stable spatial support system around the main tower 1. When the angle is 30 degrees, sufficient clearance is maintained between the sub-towers 2 to prevent interference with the rotation of the impeller 3, while also reducing the difficulty of lifting due to space congestion during transportation. When the angle reaches 90 degrees, a nearly orthogonal support layout is formed between the sub-towers 2, enhancing the main tower 1's ability to resist torsional loads. Through dynamic adjustment within this angle range, the sub-towers 2 can adapt to transportation path restrictions under different terrain conditions and improve overall structural stability by optimizing the support angle.

[0035] Through the above technical solution, this application effectively solves the problems of poor structural stability and transportation and hoisting difficulties caused by the unreasonable layout of the sub-tower 2. The sub-tower 2 is designed to be adjustable within a range of 30 to 90 degrees, allowing the installation position of the impeller 3 to be flexibly adjusted according to the actual terrain, while ensuring the main tower 1's ability to resist overturning under wind loads and reducing the risk of spatial interference between the sub-tower 2 components during transportation.

[0036] The present application further proposes a plurality of first connection structures 4 , each of which connects two adjacent sub-towers 2 .

[0037] The first connection structure 4 refers to the mechanical connection component provided between adjacent sub-towers 2. Specifically, it can be implemented using metal trusses, welded frames, or prestressed cables. Its function is to establish a load transfer path between the sub-towers 2. Adjacent sub-towers 2 refer to two independent support structures arranged at an angle around the main tower 1. Specifically, they can be connected to the main tower 1 via yaw bearings. Their function is to form a spatial support system through multi-point connection.

[0038] Specifically, the first connecting structure 4 is configured to form distributed connection nodes between adjacent sub-towers 2. When a single sub-tower 2 is subjected to wind loads, the load is transferred to adjacent sub-towers 2 through the connecting structure, thereby dispersing local stress concentrations. For example, when a truss is used as the connecting structure, the truss's triangular support elements convert the bending moment of the sub-tower 2 into an axial force, which is balanced by the support reaction forces of adjacent sub-towers 2. The number of connecting structures is determined based on the spacing between the sub-towers 2 and the load distribution. For example, two sets of connecting structures can be provided at the midsection and top of a sub-tower 2, respectively, to form a multi-level load transfer path.

[0039] Through the above technical solution, the present application effectively reduces the risk of local deformation of the sub-tower 2 due to independent load-bearing, and transforms the sub-tower 2 group into an integral force-bearing unit through the mesh support system formed by the connecting structure. While maintaining the independent yaw function of the sub-tower 2, it significantly improves the structural bending stiffness and torsional resistance.

[0040] The present application further proposes that a plurality of second connection structures 5 are respectively connected to two adjacent sub-towers 2 , and the second connection structures 5 and the first connection structures 4 are spaced apart in the length direction of the sub-towers 2 .

[0041] The second connecting structure 5 refers to a supporting member attached between adjacent sub-towers 2, and can be implemented as a rigid link or flexible cable, forming supplementary connection points at different axial locations of the sub-towers 2. The longitudinal spacing of the sub-towers 2 refers to maintaining a preset spacing between the first connecting structure 4 and the second connecting structure 5 along the axis of the sub-towers 2. This can be achieved by arranging connection points at different heights of the sub-towers 2 to meet the support requirements of different sections of the sub-towers 2.

[0042] Specifically, a double connection system is formed between adjacent sub-towers 2 through the first connection structure 4 and the second connection structure 5. After the first connection structure 4 forms an initial connection at a certain position of the sub-tower 2, the second connection structure 5 adds a second set of connection points at an axially spaced position. The two sets of connection structures are staggered in the axial direction of the sub-tower 2, so that when the sub-tower 2 is subjected to wind load, the two sets of connection points bear load components in different directions respectively. When the sub-tower 2 is bent and deformed, the first connection structure 4 mainly suppresses the relative displacement of the area close to the main tower 1, and the second connection structure 5 limits the swing amplitude of the distal area. The synergistic effect of the two sets of connection structures enables the sub-tower 2 to form a segmented constraint as a whole, effectively reducing the risk of stress concentration at a single connection point.

[0043] Through the above-mentioned technical solution, this application effectively solves the problem of insufficient stability caused by the single connection structure of the sub-tower 2. The dual connection structure forms segmented supports along the axial direction of the sub-tower 2, suppressing the swing amplitude of the sub-tower 2 under wind load and reducing the peak stress at the connection point. The spaced support points can adapt to the deformation characteristics of different sections of the sub-tower 2, avoiding the chain reaction caused by the failure of a single connection point, and significantly improving the operational reliability of the tower system in complex wind farm environments.

[0044] The present application further proposes that the first connecting structure 4 is a first cable, and multiple first cables are in the same plane; optionally, the second connecting structure 5 is a second cable, and multiple second cables are in the same plane.

[0045] The first cable refers to a flexible constraint member connecting adjacent sub-towers 2. Specifically, it can be implemented by high-strength steel strands or carbon fiber composite cables. A triangular truss structure is formed by symmetrical arrangement in a plane, which is used to evenly transfer the tensile load between the sub-towers 2 to the main tower 1. The second cable refers to an auxiliary constraint member spaced apart from the first cable in the length direction of the sub-tower 2. Specifically, it can be implemented by parallel steel wire bundles or fiber-reinforced polymer cables. By constructing a constraint system perpendicular to the plane of the first cable, a spatial truss effect is formed to resist torsional torque. The same plane arrangement means that the axes of multiple cables are coplanar. Specifically, it can be achieved by anchoring them at equal intervals on the preset node rings of the sub-tower 2, so that the cable group forms a stable geometric topology in the plane, avoiding stress concentration caused by asymmetric loads.

[0046] Specifically, the first and second cable planes are spaced apart along the axis of the sub-tower 2, forming a double-layer spatial constraint system. When the sub-tower 2 is subjected to lateral wind loads, the first cable plane decomposes the load into an axial tension within the plane through the coordinated tensioning of multiple cables inside it, thereby suppressing the horizontal displacement of the sub-tower 2. The second cable plane forms a supplementary constraint at the axially spaced position, limiting the bending deformation of the sub-tower 2 through the spatial truss effect. The flexible characteristics of the cables allow the structure to produce controllable elastic deformation under extreme loads, dissipating vibration energy through the sliding friction of the steel wires inside the cable body, and avoiding fatigue fracture of the rigid connection nodes.

[0047] Through the above technical solution, the present application effectively reduces local stress concentration at the connection points of the sub-towers 2. The elastic deformation capacity of the cable system absorbs dynamic load energy, suppressing the swing amplitude of the sub-towers 2 under complex wind conditions. The spaced-apart double-layer cable arrangement enhances the torsional rigidity of the connection system, preventing the sub-towers 2 from destabilizing and deforming due to asymmetric loads, and significantly improving the fatigue resistance of the multi-tower 2 structure.

[0048] Please refer to Figure 2 and Figure 3 The present application further proposes that the plurality of sub-towers 2 include a first sub-tower 21 and two second sub-towers 22 , wherein the length of the first sub-tower 21 is longer than that of the second sub-tower 22 , or the length of the second sub-tower 22 is longer than that of the first sub-tower 21 .

[0049] The first sub-tower 21 is a support structure directly connected to the main tower 1 and has an independent length. Specifically, it can be implemented as a segmented steel truss structure, with the length difference achieved by adjusting the number of truss segments. The second sub-tower 22 refers to two auxiliary support structures connected to the main tower 1. Specifically, it can be implemented as a detachable tubular frame structure, and its length configuration is adjusted according to the installation environment.

[0050] Specifically, when the first sub-tower 21 is longer than the second sub-tower 22, the impeller 3 at the end of the first sub-tower 21 is positioned at a higher altitude, while the impellers 3 at the ends of the two second sub-towers 22 form a symmetrical arrangement at a relatively lower altitude. When the second sub-tower 22 is longer than the first sub-tower 21, the impellers 3 at the ends of the two second sub-towers 22 are elevated to different levels, while the impeller 3 at the end of the first sub-tower 21 is positioned at an intermediate level. This creates a staggered distribution of the impellers 3 in vertical space, avoiding energy loss caused by overlapping rotation planes. Furthermore, the varying lengths of the sub-towers 2 allow the tower units corresponding to each impeller 3 to be manufactured and transported independently.

[0051] Through the above technical solution, the present application realizes the modular disassembly and manufacturing of the tower unit, so that the supporting structure corresponding to the extra-long impeller 3 is decomposed into short-sized sub-towers 2 that can be standardized for production, solving the problem of over-limit transportation. The vertical staggered layout formed by the length difference of the sub-towers 2 makes it possible for multiple impellers 3 to not interfere with each other in a limited horizontal space, reducing the demand for installation site area. The independent lifting method of the sub-towers 2 avoids the dependence of the overall lifting on heavy equipment, and is particularly suitable for unit deployment in complex terrain conditions such as mountains or at sea.

[0052] The present application further proposes that the impeller 3 provided on the first sub-tower 21 is the first impeller 31 , and the impeller 3 provided on the second sub-tower 22 is the second impeller 32 , and the first impeller 31 and the second impeller 32 face in opposite directions.

[0053] The first impeller 31 is a rotating power generation unit mounted at the end of the longer sub-tower 2. Specifically, it can be implemented using a horizontal axis three-blade structure, with its rotation axis forming a preset angle with the axis of the sub-tower 2. The second impeller 32 is a rotating power generation unit mounted at the end of the shorter sub-tower 2. Specifically, it can be implemented using a counter-rotating structure arranged symmetrically with the first impeller 31. Opposite orientation means that the windward normal directions of the two sets of impellers 3 form a 180-degree angle. This can be achieved by independently controlling the yaw bearings of the sub-tower 2 and the main tower 1, so that the two sets of impellers 3 appear back-to-back in horizontal projection.

[0054] Specifically, when the main wind direction acts on the front of the first impeller 31, the second impeller 32 is in the leeward rotation plane, and the vortices generated by the rotation of the two form a staggered distribution in space. Due to the vertical spacing formed by the difference in the length of the sub-towers 2, the wake disturbance generated by the first impeller 31 has undergone turbulent dissipation when it reaches the height of the second impeller 32. When the wind direction deflects, one of the two groups of reverse impellers 3 always maintains the optimal windward angle, and the other group is adjusted to the suboptimal angle through the yaw bearing, forming a dynamic complementary effect. The difference in structural stiffness brought about by the different lengths of the sub-towers 2 forms a mechanical balance with the asymmetric wind load generated by the reverse impellers 3, reducing the periodic fluctuation amplitude of the bending moment at the root of the main tower 1.

[0055] Through the above-mentioned technical solution, this application effectively eliminates airflow interference between the impellers 3 of the sub-towers 2, enabling independent utilization of wind energy resources at different altitudes. The three sets of counter-rotating impellers generate a self-balancing torque during alternating wind exposure, reducing the risk of fatigue damage to the sub-towers 2's connecting structure. The coordinated design of the length differences of the sub-towers 2 and the orientation of the impellers 3 enables the unit to maintain stable output power even when adapting to complex wind direction changes.

[0056] The present application further proposes that the two second impellers 32 rotate in the same plane.

[0057] The second impeller 32 is a wind capture device mounted at the end of the second sub-tower 22. Specifically, it can be implemented as a horizontal three-blade structure, with its rotation axis parallel to the extension direction of the sub-tower 2. Rotation within the same plane means that the rotational trajectories of the two impellers 3 are spatially located in overlapping or parallel geometric planes. This can be achieved by adjusting the installation angle of the sub-tower 2 and the yaw angle of the impellers 3, so that the rotational axes of the impellers 3 form a coplanar relationship within the projection plane.

[0058] Specifically, the two second sub-towers 22 are symmetrically distributed on both sides of the main tower 1, and a calibration device is used to ensure that the rotation planes are coplanar during installation of the impeller 3. When wind force acts on the impeller 3, the aerodynamic loads generated by the coplanar rotation form a symmetrical relationship in spatial distribution, avoiding the airflow shear effect caused by the misalignment of the rotation plane. The torsional moments borne by the connecting structure of the sub-towers 2 are offset by each other in the coplanar layout, and the foundation of the main tower 1 only needs to resist the overturning moment within the plane. During the hoisting process of the impeller 3 assembly, the coplanar structure allows the use of plane positioning tooling for overall assembly, reducing the high-altitude angle calibration work.

[0059] Through the above technical solution, the present application solves the problems of structural instability and difficulty in lifting and positioning caused by the rotation of multiple impellers 3 in different planes, reduces the stress fluctuation amplitude of the connection structure of the sub-tower 2, realizes the standardized lifting process of the impeller 3 assembly, and reduces the posture calibration process in high-altitude operations.

[0060] The present application further proposes a technical solution in which the rotation plane of the impeller 3 is arranged at an angle to the axis of the sub-tower 2 .

[0061] The rotation plane of the impeller 3 refers to the plane formed by the blade motion trajectory when the impeller 3 rotates. This can be achieved by adjusting the installation angle of the impeller 3 or the inclination angle of the axis of the sub-tower 2. This plane forms a non-perpendicular relationship with the axis of the sub-tower 2 to change the blade motion trajectory. The axis of the sub-tower 2 refers to the centerline of the sub-tower 2 along its extension direction. This can be achieved by the connection structure between the sub-tower 2 and the main tower 1 or the curved design of the sub-tower 2 itself. The direction of the axis determines the spatial layout of the sub-tower 2.

[0062] Specifically, by creating an angle between the impeller 3's rotation plane and the sub-tower 2's axis, the blades rotate away from the main structure of the sub-tower 2, preventing the blade tips from colliding with the sub-tower 2 due to the impeller 3's excessive diameter. When the sub-tower 2's axis extends at an angle, the angle between the impeller 3's rotation plane and the axis causes the blade's trajectory to deviate from the sub-tower 2's wake, reducing the periodic impact of aerodynamic loads on the sub-tower 2. Furthermore, this angle offsets the impeller 3's center of gravity relative to the sub-tower 2's axis, reducing the bending moment at the tower's base through mechanical decomposition, thereby enhancing overall structural stability.

[0063] In some specific embodiments, the angle between the impeller 3 rotation plane and the sub-tower 2 axis can be in the range of 30 to 60 degrees, and this angle can be adjusted to accommodate different impeller 3 sizes. In other embodiments, the sub-tower 2 axis can be designed to extend upward with an upward tilt, while the impeller 3 rotation plane remains vertical, forming an asymmetric layout to avoid the tower body.

[0064] Through the above technical solution, the present application can effectively avoid tower sweeping accidents caused by the large-size impeller 3 due to the rotation trajectory being perpendicular to the tower axis, reduce the aerodynamic interference between the blades and the tower structure, and at the same time reduce the tower root load through mechanical optimization, increase the blade clearance margin and reduce the blade manufacturing cost.

[0065] The present application further proposes that the sub-tower 2 is connected to the main tower 1 via a yaw bearing.

[0066] The yaw bearing is a mechanical component capable of transmitting loads with a rotational degree of freedom. Specifically, it can be implemented using a four-point contact ball bearing or a crossed roller bearing. Its inner and outer rings are fixedly connected to the flange surfaces of the main tower 1 and the sub-tower 2. This structure allows the sub-tower 2 to rotate 360 ​​degrees around the axis of the main tower 1 while bearing axial loads and overturning moments, thus resolving the issue of high installation and positioning accuracy for the sub-tower 2.

[0067] Specifically, the flange of subtower 2 is fastened to the outer ring of the yaw bearing with high-strength bolts. A corresponding annular base is installed on the main tower 1, connecting it to the inner ring of the bearing. When wind direction changes, the yaw drive mechanism rotates subtower 2 around the axis of the main tower 1, ensuring that the plane of impeller 3 maintains an optimal angle to the wind. During hoisting operations, subtower 2 can be pre-adjusted to a folded position for easy transportation. Once hoisted to the installation height, it is unfolded to its working position via the yaw bearing, eliminating the need for precise alignment at high altitude.

[0068] Through the above technical solution, the present application realizes independent control of the azimuth angle of the sub-tower 2, so that the impeller 3 can track the changes in wind direction in real time; simplifies the connection node structure between the sub-tower 2 and the main tower 1, and reduces the manufacturing precision requirements; allows the sub-tower 2 to be temporarily folded during the hoisting process, avoiding the difficulty of high-altitude positioning of large-sized components; and at the same time provides a rotating inspection station for subsequent maintenance operations, so that bearing maintenance operations can be performed without disassembling the overall structure.

[0069] Finally, it should be noted that the above embodiments are intended to illustrate the present invention only and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and are intended to be encompassed by the claims of the present invention.

Claims

1. A new type of wind turbine, characterized in that: include: main tower; A plurality of sub-towers, one end of each sub-tower being connected to the main tower, and the plurality of sub-towers being arranged at an angle to each other; A plurality of impellers are provided, each impeller being arranged at one end of the sub-tower away from the main tower, and the plurality of impellers are arranged facing at least two different directions.

2. The novel wind turbine generator set according to claim 1, characterized in that: The angles between the plurality of sub-towers range from 30 degrees to 90 degrees.

3. The novel wind turbine generator set according to claim 1, characterized in that: The novel wind turbine generator set includes a plurality of first connection structures, each of which connects two adjacent sub-towers.

4. The novel wind turbine generator set according to claim 3, characterized in that: The novel wind turbine generator set includes a plurality of second connecting structures, each of which connects two adjacent sub-towers. The second connecting structures and the first connecting structures are spaced apart in the length direction of the sub-towers.

5. The novel wind turbine generator set according to claim 4, characterized in that: The first connecting structure is a first cable, and a plurality of the first cables are in the same plane; And / or, the second connecting structure is a second cable, and a plurality of the second cables are in the same plane.

6. The novel wind turbine generator set according to claim 1, characterized in that: The plurality of sub-towers include a first sub-tower and two second sub-towers; The length of the first sub-tower is longer than that of the second sub-tower, or the length of the second sub-tower is longer than that of the first sub-tower.

7. The novel wind turbine generator set according to claim 6, characterized in that: The impeller provided on the first sub-tower is a first impeller, and the impeller provided on the second sub-tower is a second impeller. The first impeller and the second impeller face opposite directions.

8. The novel wind turbine generator set according to claim 7, characterized in that: The two second impellers rotate in the same plane.

9. The novel wind turbine generator set according to any one of claims 1 to 8, characterized in that: The rotation plane of the impeller is arranged at an angle to the axis of the sub-tower.

10. The novel wind turbine generator set according to any one of claims 1 to 8, characterized in that: The sub-tower is connected to the main tower via a yaw bearing.

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