Wind power tower and wind power generation device

Abstract

This application relates to the field of wind power technology and discloses a wind turbine tower and a wind power generation device. The wind turbine tower includes a lattice section, a truss, and a tower section. The lattice section includes multiple supports arranged around a predetermined direction and multiple connecting rods connecting adjacent supports. Each support has a turning point where its extension direction changes, and the portion of the support located on one side of the turning point extends along the predetermined direction. The height of the turning point is less than or equal to the lowest tip height of the wind turbine blade, and the end of the portion of the support extending along the predetermined direction is higher than the lowest tip height of the wind turbine blade. The truss is arranged around the predetermined direction and located between the multiple supports, connecting the portions of the multiple supports including the turning points. The tower section extends along the predetermined direction, and one end of the tower section is connected to the end of the portion of the supports extending along the predetermined direction. The wind turbine tower and wind power generation device provided by this application can help improve the load-bearing capacity of the tower.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a wind turbine tower and a wind power generation device. Background Technology

[0002] With the continuous development of new energy technologies, the proportion of wind power generation is also constantly increasing. Wind power generation devices are usually installed on land or at sea where wind energy is abundant. The blades of a wind turbine can rotate under the influence of the surrounding wind, which in turn drives the rotor to rotate and output electrical energy. Wind turbines are usually installed at a certain height in the air, so as to generate electricity in the optimal location.

[0003] The tower is the part used to mount wind turbines. The wind turbine is mounted on top of the tower, which holds it at a suitable height. The load-bearing capacity of the tower affects the normal operation of the wind turbine; therefore, improving the tower's load-bearing capacity is an important issue. Utility Model Content

[0004] The purpose of this application is to provide a wind turbine tower and a wind power generation device that can help improve the load-bearing capacity of the tower.

[0005] To address the aforementioned technical problems, embodiments of this application provide a wind turbine tower. The wind turbine tower includes a lattice section, a truss, and a tower section. The lattice section includes multiple supports arranged around a predetermined direction, and multiple connecting rods connecting adjacent supports. Each support has a turning point where its extension direction changes, and the portion of the support located on one side of the turning point extends along the predetermined direction. The height of the turning point is less than or equal to the lowest tip height of the wind turbine blade, and the end of the portion of the support extending along the predetermined direction is higher than the lowest tip height of the wind turbine blade. The truss is arranged around the predetermined direction and located between the multiple supports, connecting the portions of the multiple supports including the turning points. The tower section extends along the predetermined direction, one end of the tower section is connected to the end of the portion of the supports extending along the predetermined direction, and the other end of the tower section is used to mount a wind turbine.

[0006] This application also provides a wind power generation device, which includes the aforementioned wind turbine tower and wind turbine generator. The wind turbine generator is installed at the end of the tower section of the wind turbine tower away from the lattice section.

[0007] The wind turbine tower and wind power generation device provided in this application have a turning point formed on the support column of the lattice section. The extension direction of the support column changes at the turning point, and the portion of the support column above the turning point extends along a predetermined direction. The height of the turning point of the support column in the predetermined direction is below the lowest tip height of the blade, which can avoid interference between the blade and the tower when the blade rotates. At the same time, the top height of the lattice section is higher than the lowest tip height of the blade in the predetermined direction, so that the transition section between the lattice section and the tower section can be close to the top of the tower, reducing the load. Furthermore, by structurally strengthening the portion of the support column with the turning point using trusses, the load-bearing capacity of the tower can be improved.

[0008] In some implementations, the truss includes chords corresponding to the struts, and a plurality of web members connecting two adjacent chords, the chords being connected to the corresponding struts at the turning points.

[0009] In some implementations, multiple support rods are provided between each chord and its corresponding support rod, with one end of the support rod connected to the chord and the other end connected to the support rod.

[0010] In some embodiments, multiple web members are spaced apart from each other, and support members are provided at the positions where the chord members are connected to the web members.

[0011] In some embodiments, the truss includes a first part and a second part, which are detachably connected and are symmetrically arranged about a preset direction.

[0012] In some embodiments, the web member located at the connection between the first part and the second part includes a first crossbar and a second crossbar, one end of the first crossbar is connected to one end of the second crossbar, the other end of the first crossbar is connected to the chord of the first part, and the other end of the second crossbar is connected to the chord of the second part.

[0013] In some implementations, the other end of the first crossbar and the other end of the second crossbar are both welded to the corresponding chord.

[0014] In some embodiments, the support column includes a support portion, a turning portion, and an extension portion arranged sequentially. The extension directions of the support portion and the turning portion both form an angle with a preset direction. The connection position between the turning portion and the extension portion is the turning position, and the extension direction of the extension portion is parallel to the preset direction.

[0015] In some embodiments, the angle between the extension direction of the support and the preset direction is smaller than the angle between the turning part and the preset direction. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a structural schematic diagram of a wind turbine tower with a wind turbine generator installed, provided in some embodiments of this application;

[0018] Figure 2 This is an exploded structural diagram of the location of the truss in a wind turbine tower provided in some embodiments of this application;

[0019] Figure 3 This is a schematic diagram of the truss structure in a wind turbine tower provided in some embodiments of this application;

[0020] Figure 4 This is a schematic diagram of the splicing structure of the support column in the wind turbine tower provided in some embodiments of this application;

[0021] Figure 5 This is a schematic diagram of the cooperation structure between the support column and the connecting rod in a wind power tower provided in some embodiments of this application. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to enable readers to better understand this application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can be implemented. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0024] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0025] As wind turbines become increasingly powerful and their blades larger, high-load-bearing towers are required for their installation. Hybrid towers, with their advantages of high load-bearing capacity and convenient transportation, are finding increasing applications in the wind power sector. A hybrid tower consists of a tower section, a transition section, and a lattice section from top to bottom. A common approach is to control the elevation of the top of the transition section below the blade tip elevation, ensuring that the area within the blade region is entirely within the tower section. The advantage of this approach is that the tower section generally has a smaller diameter, effectively reducing the risk of blade sweeping. However, this approach introduces problems: as blades become larger, the transition section elevation decreases, and with the gradual increase in wind turbine load, the load on the transition section from the wind turbine increases significantly. Furthermore, the transition section must consider the geometric changes from the circular base of the tower section to the point supports of the lower lattice section, making the design increasingly difficult and becoming a bottleneck in the development of lattice towers.

[0026] To further improve the load-bearing capacity of the tower, enabling it to adapt to larger blades and heavier loads, while reducing the design complexity of the transition section, this application provides a wind turbine tower in some embodiments. The wind turbine tower extends the lattice section beyond the lowest point of the blade tip, forming a transition section with a geometrical change in outer contour at the lowest point of the blade tip. The traditional transition section, i.e., the junction between the tower section and the lattice section, is located closer to the top of the tower, effectively reducing the load on the top of the transition section and simplifying its design and fabrication. The transition section of the lattice section uses discrete lattice components, allowing for greater adjustment and more rational stress distribution. Simultaneously, since the outer contour of the transition section abruptly changes, representing a structurally weak point, a ring truss is designed to effectively strengthen the transition section of the lattice section, improving the load-bearing capacity at this location.

[0027] The following is combined Figures 1 to 5 This application describes the structure of wind turbine towers provided in some embodiments. Among them, Figure 1 The structure of a wind turbine tower with a wind turbine generator installed is shown.

[0028] like Figures 1 to 5As shown, some embodiments of this application provide a wind turbine tower 100 including a lattice section 11, a truss 12, and a tower section 13. The lattice section 11 includes a plurality of supports 111 arranged around a predetermined direction, and a plurality of connecting rods 112 connecting adjacent supports 111. Each support 111 has a turning point 101 where its extension direction changes, and a portion of the support 111 located on one side of the turning point 101 extends along the predetermined direction. The height of the turning point 101 is less than or equal to the lowest tip height of the wind turbine blade 22, and the end of the portion of the support 111 extending along the predetermined direction is higher than the lowest tip height of the wind turbine blade 22. The truss 12 is arranged around the predetermined direction and located between the plurality of supports 111, connecting the portions of the plurality of supports 111 including the turning point 101. The tower section 13 extends along the predetermined direction, one end of the tower section 13 is connected to the end of the portion of the support 111 extending along the predetermined direction, and the other end of the tower section 13 is used to mount a wind turbine generator 200.

[0029] The lattice section 11 of the tower is a prefabricated structure, comprising multiple supports 111 and multiple connecting rods 112. The supports 111 can be filled with concrete and can contain prestressed structures, such as prestressed steel strands. The supports 111 can be assembled using external flanges with reinforcing ribs at the joints. The connecting rods 112 in the lattice section 11 can be arranged horizontally or diagonally, and can be made of hollow steel pipes. The preset direction is the vertical direction during tower installation and use. Multiple supports 111 are arranged around the preset direction, and the enclosed internal space can be used as a personnel passage. Node plates 1114 can be welded to the supports 111, and connecting plates 1121 can be welded to the ends of the connecting rods 112. The connecting plates 1121 can be fixed to the node plates 1114 using fasteners, thereby connecting the multiple supports 111 together.

[0030] Turning point 101 is the location where the extension direction of the support column 111 changes; that is, the portions on different sides of turning point 101 extend in different directions, forming a turning angle at turning point 101. The portion of the support column 111 after turning point 101 extends in a parallel direction to a predetermined direction; that is, the top of the support column 111 is set vertically to form the part connecting with the tower section 13. The lattice section 11 as a whole undergoes a dimensional change at turning point 101, and the lattice section 11 has a shape that is wider at the bottom and narrower at the top.

[0031] By creating a turning point 101 near or below the lowest point of the blade tip on the support column 111, the clearance constraints of the blade 22 can be flexibly accommodated, ensuring that the blade 22 will not collide with the tower during operation. This allows for flexible adjustment of the taper of the lattice section 11 below the turning point 101, resulting in less material usage and higher structural installation efficiency. Furthermore, by adjusting the taper of the lattice section 11, the tower frequency can be flexibly adjusted, thereby avoiding the resonance range of the wind turbine 200 and ensuring the safety of the tower.

[0032] Meanwhile, one end of the support column 111 extends upward to above the lowest position of the blade tip, meaning that the top height of the support column 111 is higher than the lowest position of the blade tip. This allows the top of the lattice section 11 to be set closer to the top of the tower, which can effectively reduce the load on the top of the transition section 14 and reduce the design and processing difficulty of the transition section 14.

[0033] The connecting rod 112 can be configured as a diagonal brace, with several inclined connecting rods 112 connecting each of two adjacent support columns 111, and multiple connecting rods 112 at the same height between two support columns 111 intersecting and fixed. The connecting rod 112 can also be configured as a horizontal brace, with several horizontally arranged connecting rods 112 connecting each of two adjacent support columns 111, and the horizontally arranged connecting rods 112 and the inclined connecting rods 112 can be fixed at their intersection.

[0034] The tower section 13 can be made of round steel pipe, and is installed on top of the lattice section 11 via a transition section 14. The transition section 14 can be fixed to the top of the support column 111 using a flange connection, and the tower section 13 can be assembled on the transition section 14. The tower section 13 can be assembled in sections, and its height can be set to approximately half the length of the blade 22.

[0035] The wind turbine tower 100 provided in some embodiments of this application has a turning point 101 formed on the support column 111 of the lattice section 11. The extension direction of the support column 111 changes at the turning point 101, and the portion of the support column 111 above the turning point 101 extends along a predetermined direction. The height of the turning point 101 of the support column 111 is less than or equal to the lowest tip height of the blade, which can prevent interference between the blade 22 and the tower when rotating. At the same time, the top height of the lattice section 11 is higher than the lowest tip height of the blade, so that the transition section 14 between the lattice section 11 and the tower section 13 can be close to the top of the tower, reducing the load. Furthermore, by structurally strengthening the portion of the support column 111 with the turning point 101 through the truss 12, the load-bearing capacity of the tower can be improved.

[0036] like Figure 2 and Figure 3As shown, the truss 12 may include chord members 121 corresponding to the support column 111, and a plurality of web members 122 connecting two adjacent chord members 121. The chord members 121 are connected to the corresponding support column 111 at the turning point 101.

[0037] Chord members 121 are correspondingly arranged with support columns 111, and chord members 121 serve as the main members of the truss 12, forming the main load-bearing parts. Adjacent chord members 121 are connected by multiple web members 122, which can be arranged horizontally or diagonally. The chord members 121 are connected to the support columns 111, including the turning points 101, which can structurally strengthen the turning angles of the chord members 121, forming a double-layer spatial ring truss structure.

[0038] In addition, multiple support rods 123 can be provided between each chord 121 and its corresponding support rod 111. One end of the support rod 123 is connected to the chord 121, and the other end of the support rod 123 is connected to the support rod 111.

[0039] Support members 123 connect chord members 121 to their corresponding supports 111. By connecting chord members 121 and their corresponding supports 111 at different positions, support members 123 ensure the connection between the truss 12 and the lattice segment 11. The number of support members 123 at each position of the chord member 121 can be set as needed. For example... Figure 3 As shown, a smaller number of support rods 123 can be used to connect the two ends of the chord 121, while a larger number of support rods 123 can be used to connect the middle of the chord 121 at the turning point 101 where it meets the corresponding support column 111. One end of the support rod 123 can be welded to the chord 121, and a flange is provided at the other end of the support rod 123. Simultaneously, a protruding mating part is provided at the corresponding position on the support column 111, and the mating part is also provided with a flange. The flange at the end of the chord 121 can be connected to the flange at the mating part of the support column 111 using fasteners, thereby realizing the connection between the truss 12 and the lattice segment 11.

[0040] In practice, the support column 111 can be formed by splicing multiple sub-columns 1111, and the lattice segment 11 can include multiple splicing units, each splicing unit being formed by connecting and enclosing sub-columns 1111 at different positions. When installing the lattice segment 11, the splicing units can be connected sequentially. When connecting the splicing unit formed by the sub-columns 1111 with the turning point 101, the truss 12 can be connected to the sub-columns 1111 of the splicing unit, thereby installing the formed double-layer spatial ring truss structure at the predetermined position of the lattice segment 11.

[0041] In addition, the truss 12 may include a first part 1201 and a second part 1202, which are detachably connected and are symmetrically arranged about a preset direction.

[0042] In other words, truss 12 can be formed by splicing two symmetrically arranged parts. The first part 1201 and the second part 1202 are detachably connected, which facilitates the splicing and assembly of truss 12. The first part 1201 and the second part 1202 can be formed by connecting some chord members 121 and web members 122. In practice, different parts of truss 12 can be prefabricated, and the chord members 121 and web members 122 of different parts can be welded together to form a whole. During tower installation, the first part 1201 and the second part 1202 can be spliced ​​together to form a complete truss 12, reducing the difficulty of on-site installation.

[0043] like Figure 3 As shown, the web member 122 located at the connection between the first part 1201 and the second part 1202 may include a first crossbar 1221 and a second crossbar 1222. One end of the first crossbar 1221 is connected to one end of the second crossbar 1222, the other end of the first crossbar 1221 is connected to the chord member 121 of the first part 1201, and the other end of the second crossbar 1222 is connected to the chord member 121 of the second part 1202.

[0044] The first crossbar 1221 and the second crossbar 1222 are connected to different parts of the truss 12. When connecting different parts of the truss 12, the first crossbar 1221 and the second crossbar 1222 can be connected together, and the ends of the first crossbar 1221 and the second crossbar 1222 that are close to each other can be fixed together.

[0045] In addition, the other end of the first crossbar 1221 and the other end of the second crossbar 1222 can be welded to the corresponding chord bar 121.

[0046] By pre-welding one end of each crossbar to its corresponding chord 121, the crossbar and chord 121 can be integrated into a single unit, thus ensuring the structural strength of different parts of the truss 12. The protruding ends of the different crossbars can be joined together during truss 12 assembly to form a complete truss 12.

[0047] In some embodiments, a plurality of web members 122 may be spaced apart from each other along a preset direction, and a support member 123 may be provided at the position where the chord member 121 is connected to the web member 122.

[0048] like Figure 3As shown, multiple web members 122 are respectively installed along the two ends and the middle of the chord member 121, serving as connections at different locations. Furthermore, the multiple web members 122 connected to the same location as the chord member 121 are arranged horizontally, reducing the assembly difficulty of the web members 122. Support members 123 are installed at the locations where the chord member 121 connects to the web members 122, ensuring that the force on the chord member 121 is distributed through the web members 122, thus ensuring the structural strengthening effect of the truss 12. One, two, or three support members 123 can be installed at the locations where the chord member 121 connects to the web members 122.

[0049] like Figure 1 As shown, the support column 111 may include a support portion 102, a turning portion 103 and an extension portion 104 arranged sequentially. The extension directions of the support portion 102 and the turning portion 103 are both at an angle to a preset direction. The connection position between the turning portion 103 and the extension portion 104 is the turning position 101. The extension direction of the extension portion 104 is parallel to the preset direction.

[0050] The support portion 102 is located at the bottom of the lattice section 11 and is mounted on a base, which fixes it to the ground or water surface. The support portion 102 provides support at the bottom of the lattice section 11. The turning portion 103 is the part of the support column 111 where the extension direction changes. The support column 111 shrinks at the turning portion 103 to accommodate the connection between the top of the lattice section 11 and the tower section 13. Simultaneously, the shrinking portion of the support column 111 avoids the movement path of the blade 22, preventing the blade 22 from colliding with the tower during rotation. The extension portion 104 is located at the top of the support column 111, and its extension direction is parallel to a predetermined direction, forming a vertically extending portion.

[0051] In addition, the angle between the extension direction of the support portion 102 and the preset direction is smaller than the angle between the turning portion 103 and the preset direction.

[0052] In other words, the inclination of the support section 102 relative to the vertical direction is less than that of the turning section 103 relative to the vertical direction. The support section 102 adopts a smaller inclination and is relatively gentle overall, which can ensure the load-bearing capacity of the bottom of the lattice section 11. The turning section 103 adopts a larger inclination, which can facilitate the connection between the support section 102 and the extension section 104, ensuring that the bottom of the multiple pillars 111 can smoothly transition to the top while forming a large space inside, and that the top of the multiple pillars 111 can form a smaller space inside, which can accommodate the connection with the tower section 13.

[0053] Some embodiments of this application also provide a wind power generation device, which includes the wind turbine tower 100 and the wind turbine generator 200 described above. The wind turbine generator 200 is installed at the end of the tower section 13 of the wind turbine tower 100 away from the lattice section 11.

[0054] The tower can be mounted on a base, which can be formed on land or sea. The bottom of the tower lattice section 11 can be fixed to the base, and the top of the tower lattice section 11 can form an installation platform for arranging the wind turbine 200. In practice, the wind turbine 200 can have a tower section, the bottom of which can be fixed to the lattice tower, and the generator set of the wind turbine 200 can be installed on the top of the tower section. By using a lattice tower, the wind turbine 200 can be arranged at a suitable height, allowing it to fully utilize the wind energy present in the surrounding environment and thus generate electricity under optimal conditions.

[0055] Furthermore, when the blades are too long, traditional methods result in an excessively long tower section 13, which is not conducive to cost savings. Replacing part of the tower section 13 with a rising lattice section offers better economic benefits. Moreover, in traditional lattice towers, once the blade length is determined, the heights of the lattice section and the tower section 13 are also fixed. Adjusting the tower structure frequency to avoid the resonance range of the main engine operation can only be achieved by adjusting the spacing between the lattice section supports. However, the tower structure provided in some embodiments of this application allows for free adjustment of the relative heights of the tower section 13 and the lattice section 11, resulting in more effective frequency control of the tower. The reduced stress on the transition section 14 allows for a direct reduction in the material dimensions of the transition section 14. The geometrically altered portion of the lattice section 11 uses discrete components. This improvement effectively reduces the size and weight of all components of the entire tower, improves transportation and installation efficiency, and lowers the overall cost of the tower.

[0056] The wind turbine 200 includes a nacelle 21 and blades 22, with a hub installed inside the nacelle 21. The tower is formed by combining a lattice section 11, a transition section 14, and a tower section 13. The lattice section 11 forms a double-layer spatial ring truss structure at the turning point 101 of the support column 111. The double-layer spatial truss structure includes supports 111, connecting rods 112, and an inner truss 12 within a relevant height range. The inner truss 12 includes chord members 121, web members 122, and support members 123. Sub-columns 1111 of different sections of the support column 111 are equipped with mating flanges 1112 and are connected and fixed by bolts 1113.

[0057] All components can be factory-fabricated and then installed on-site using bolts. The support column 111 is divided into different sections according to suitable transport capacity and connected by mating flanges 1112 at both ends of each section. The mating flanges 1112 can be welded to the ends of the support column 111 sections. The node plates 1114 on the support column 111 sections have pre-drilled bolt holes in the factory and are welded to the support column 111 sections before leaving the factory.

[0058] The connecting rod 112 is slotted at the end in the factory, and the connecting plate 1211 is inserted into the slot and connected to the connecting rod 112 by welding. After being transported to the machine position, it is fastened to the node plate 1114 on the segment of the support column 111 by bolts. The chord members 121 of the inner truss 12 are welded to the design length by butt welds at the ends. The web members 122 and the support members 123 of the inner truss 12 are welded to the chord members 121 of the inner truss 12 by intersecting welds to form the inner truss 12. After being transported to the machine position, it is connected to the support column 111 through the butt joint of the support members 123 of the inner truss 12.

[0059] Considering the limitations of transport width, a docking point can be set on the web members 122 of the inner truss 12, so that the inner truss 12 can be divided into two parts, transported to the machine position separately, and then assembled.

[0060] After the assembled inner truss 12, the corresponding height range of the support column 111, and the corresponding height range of the connecting rod 112 are assembled at the machine point in the aforementioned manner, a double-layer spatial ring truss structure is formed. The whole structure is lifted and the bottom of the double-layer spatial truss structure is connected to the top of the lower lattice section 11 through the docking flange 1112 and bolts 1113.

[0061] After the lattice section 11 is spliced, it is fastened to the flange at the bottom of the transition section 14 by bolts. The top of the transition section 14 is connected to the bottom of the tower section 13 by annular flanges and bolts. The tower section 13 is connected to the nacelle 21 by annular flanges and bolts. Then the blades 22 are installed to complete the installation of the wind power generation device.

[0062] In practice, the number of supports 111 arranged in a circle can be 4, 6, or other quantities. The cross-sectional form of each component of the lattice segment 11 can be solid cross-sections such as angle steel, channel steel, round tube, and square tube, or open cross-sections such as double angle steel. The height of the double-layer spatial ring truss structure can be set as needed. Figure 3 The truss 12 shown is formed by selecting one section height above and below the point of change in the shape of the lattice segment 11. For example... Figure 2 As shown, the sub-column 1111 with the turning point 101 includes a first segment 1031 and a second segment 1032. The extension direction of the first segment 1031 forms an angle with a preset direction, and the extension direction of the second segment 1032 is parallel to the preset direction. The truss 12 is connected to both the first segment 1031 and the second segment 1032. The horizontal member connection nodes in the web members 122 of the inner truss 12 can be set with one or more nodes according to the actual structural dimensions and transportation capacity.

[0063] Those skilled in the art will understand that the above embodiments are specific implementations of this application, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this application.

Claims

1. A wind turbine tower, characterized in that, include: The lattice segment includes multiple pillars arranged around a preset direction, and multiple connecting rods connecting two adjacent pillars. The pillars have turning points where the extension direction changes. The portion of the pillar located on one side of the turning point extends along the preset direction. The height of the turning point is less than or equal to the lowest tip height of the wind turbine blade. The end of the portion of the pillar extending along the preset direction is higher than the lowest tip height of the wind turbine blade. A truss, arranged around the preset direction and located between the plurality of said supports, the truss connecting the portions of the plurality of said supports including the turning points; A tower section extends along the preset direction, one end of the tower section is connected to the end of the portion of the support extending along the preset direction, and the other end of the tower section is used to install a wind turbine.

2. The wind turbine tower according to claim 1, characterized in that, The truss includes chords corresponding to the pillars, and a plurality of web members connecting two adjacent chords. The chords are connected to the corresponding portion of the pillar including the turning point.

3. The wind turbine tower according to claim 2, characterized in that, Each chord is connected to its corresponding support post by a plurality of support rods, one end of which is connected to the chord and the other end of which is connected to the support post.

4. The wind turbine tower according to claim 3, characterized in that, Multiple web members are spaced apart from each other, and the support members are provided at the positions where the chord members are connected to the web members.

5. The wind turbine tower according to claim 2, characterized in that, The truss includes a first part and a second part, which are detachably connected and are symmetrically arranged about the preset direction.

6. The wind turbine tower according to claim 5, characterized in that, The web member located at the connection between the first part and the second part includes a first crossbar and a second crossbar. One end of the first crossbar is connected to one end of the second crossbar, the other end of the first crossbar is connected to the chord of the first part, and the other end of the second crossbar is connected to the chord of the second part.

7. The wind turbine tower according to claim 6, characterized in that, The other end of the first crossbar and the other end of the second crossbar are both welded to the corresponding chord.

8. The wind turbine tower according to claim 1, characterized in that, The support column includes a support portion, a turning portion, and an extension portion arranged sequentially. The extension directions of the support portion and the turning portion both form an angle with the preset direction. The connection position between the turning portion and the extension portion is the turning position. The extension direction of the extension portion is parallel to the preset direction.

9. The wind turbine tower according to claim 8, characterized in that, The angle between the extension direction of the support and the preset direction is smaller than the angle between the turning part and the preset direction.

10. A wind power generation device, characterized in that, include: The wind turbine tower as described in any one of claims 1 to 9; A wind turbine is installed at the end of the tower section of the wind turbine tower away from the lattice section.

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