Transition section, tower and wind generating set

Abstract

The invention relates to a transition section, a tower and a wind generating set, the tower comprises an upper tower section, a transition section and a lower tower section, the transition section comprises a central tower drum, and the top end of the central tower drum is connected with the upper tower section; the at least four connecting assemblies are arranged around the central tower drum in an annular array mode, the first ends of the connecting assemblies are connected with the lower tower section, the second ends of the connecting assemblies are connected with the lower portion of the central tower drum, and the third ends of the connecting assemblies are connected with the upper portion of the central tower drum; one connecting rod is arranged between every two adjacent connecting assemblies, the two ends of each connecting rod are connected with every two adjacent connecting assemblies respectively, and the connecting rods are perpendicular to the axis of the central tower drum; the periphery of the projection of a whole formed by the at least four connecting rods and the at least four connecting assemblies along the axis of the central tower drum forms a regular polygon, and the number of edges of the regular polygon is larger than three. According to the technical scheme, the bearing capacity can be improved, and meanwhile the material utilization rate is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of wind power equipment, in particular to a transition section, a tower and a wind turbine generator. BACKGROUND

[0002] The lattice tower includes a steel tower section at the upper part, a lattice section at the lower part, and a transition section connecting the steel tower section and the lattice section.

[0003] The existing transition section mostly resists the bending moment by stacking materials on the top of the lattice section and forming a rigid support for the upper steel tower section with a small space, which requires a large amount of stacked materials to enhance the rigidity and is high in cost. There are also triangular truss structures, but their carrying capacity is low and cannot be adapted to high-power wind turbines. SUMMARY

[0004] The purpose of the present disclosure is to provide a transition section, a tower and a wind turbine generator, which can improve the carrying capacity while improving the utilization rate of materials.

[0005] According to one aspect of the present disclosure, a tower is provided, which includes an upper tower section, a transition section and a lower tower section, the transition section comprising: a central tower cylinder, the top end of the central tower cylinder being connected with the upper tower section; at least four connecting assemblies, the at least four connecting assemblies being arranged in an annular array around the central tower cylinder, the first end of the connecting assembly being connected with the lower tower section, the second end of the connecting assembly being connected with the lower part of the central tower cylinder, the third end of the connecting assembly being connected with the upper part of the central tower cylinder; at least four connecting rods, one connecting rod being arranged between adjacent two connecting assemblies, the two ends of each connecting rod being connected with adjacent two connecting assemblies, the connecting rod being perpendicular to the axis of the central tower cylinder, so that the projection of the whole formed by the at least four connecting rods and the at least four connecting assemblies along the axis of the central tower cylinder forms a regular polygon, and the number of sides of the regular polygon is greater than three.

[0006] The technical solution provided by the present disclosure is that the first end of the connecting assembly is connected with the lower tower section, the second end of the connecting assembly is connected with the lower part of the central tower cylinder, and the third end of the connecting assembly is connected with the upper part of the central tower cylinder, so that the connecting assembly can convert the bending moment of the bottom of the upper tower section into axial force on the corresponding connecting rod of the connecting assembly, the force transmission route is clear, the strength is improved by stacking materials, and the material utilization rate is high. At the same time, the at least four connecting assemblies and the central tower cylinder can form at least four common side triangles to utilize the stability of the triangle to improve the overall carrying capacity of the entire transition section.

[0007] And, one connecting rod is arranged between each two adjacent connecting assemblies, two ends of each connecting rod are connected with the adjacent two connecting assemblies respectively, the connecting rod is perpendicular to the axis of the central tower drum, so that the projection of the whole formed by the at least four connecting rods and the at least four connecting assemblies along the axis of the central tower drum forms a regular polygon. In this way, the at least four connecting assemblies can be connected by the at least four connecting rods to form a whole structure, the lateral deformation of the structure is constrained, and the stability of the transition section under complex load is further improved.

[0008] In addition, it is worth mentioning that, compared with the transition section adopting a regular triangle layout mode, the transition section of the present disclosure adopts a regular polygon layout mode with the number of sides greater than three, or in other words, adopts a layout mode of four or more connecting assemblies, which can more evenly distribute the upper load to the tower columns of the lower tower section, so that the stress of each tower column is more balanced, the peak load of a single tower column is reduced, and the overall load bearing capacity of the tower is improved.

[0009] Optionally, the number of the connecting assemblies and the connecting rods is four.

[0010] Through the above scheme, the structure can be more concise while ensuring sufficient load bearing capacity, and the manufacturing, installation and maintenance difficulty is reduced.

[0011] Optionally, the connecting assembly comprises an angle connector, a cross brace and an inclined brace; a first end of the angle connector is connected with the tower column of the lower tower section, a second end of the angle connector is connected with the lower part of the central tower drum through the cross brace, a third end of the angle connector is connected with the upper part of the central tower drum through the inclined brace, and a fourth end of the angle connector is connected with the connecting rod.

[0012] Through the above scheme, the connecting assembly is spliced by multiple parts, which is convenient for disassembly and transportation. And the angle connector with multiple ends is used to realize the connection of multiple rod members at the included angle, which is convenient for assembly operation.

[0013] Optionally, the cross brace and the connecting rod are located in the same plane.

[0014] Through the above scheme, the adjacent two cross braces and the connecting rod can form a closed triangle in the same plane, so as to utilize the stability characteristics of the triangle to further improve the overall load bearing capacity.

[0015] Optionally, the angle connector, the cross brace, the inclined brace, the connecting rod and the tower column of the lower tower section are detachably connected through flange butt joint.

[0016] Through the above scheme, on the one hand, the flange connection reliably transmits the shearing force, axial force and bending moment of the two connected rod members through the bolt group, ensures the continuity of the load between the diagonal bracing rods, the connecting rods and the cross bracing rods, avoids the interruption of the load transmission at the connecting position, and meets the stress requirements of the wind turbine under dynamic loads such as wind load and earthquake. On the other hand, the flange connection can realize quick assembly and connection, and is convenient for installation and operation.

[0017] Optionally, the corner piece is provided with an anchoring end, and the anchoring end is connected with the tower column of the lower tower section through a pre-tightening wire.

[0018] Through the above scheme, the transition section and the lower tower section can be pre-pressed by the pre-tightening wire, and the fatigue resistance is improved.

[0019] Optionally, one end of the cross bracing rod connected with the central tower cylinder is provided with a first adapter plate, the first adapter plate is matched with the outer wall surface of the central tower cylinder; the transition section further comprises a first clamping plate, the first clamping plate is matched with the inner wall surface of the central tower cylinder, the first clamping plate is located inside the central tower cylinder, and a first fastener passes through the first adapter plate and the central tower cylinder and is connected with the first clamping plate.

[0020] Through the above scheme, the first adapter plate can be attached to the outer wall surface of the central tower cylinder, and the first clamping plate can be attached to the inner wall surface of the central tower cylinder, which is conducive to load transmission and improves the connection stability. Moreover, the central tower cylinder can be clamped by the first fastener through the first adapter plate and the first clamping plate to realize connection, so as to strengthen the connection area, meet the radial force bearing requirement of the lower part of the cross bracing rod and the central tower cylinder, and reduce the possibility of deformation and stress increase of the connection area.

[0021] Optionally, the cross bracing rod is connected with the first adapter plate through a first transition rod, the first transition rod and the cross bracing rod extend along the same straight line, and the cross-sectional outer contour size of the first transition rod increases from the cross bracing rod to the first adapter plate.

[0022] Through the above scheme, the first transition rod and the cross bracing rod extend along the same straight line to ensure effective transmission of the load. The cross-sectional outer contour size of the first transition rod increases from the cross bracing rod to the first adapter plate to further strengthen the structural strength of the connection area of the cross bracing rod and the central tower cylinder and improve the bearing capacity.

[0023] Optionally, one end of the diagonal bracing rod connected with the central tower cylinder is provided with a second adapter plate, the second adapter plate is matched with the outer wall surface of the central tower cylinder; the transition section further comprises a second clamping plate, the second clamping plate is matched with the inner wall surface of the central tower cylinder, the second clamping plate is located inside the central tower cylinder, and a second fastener passes through the second adapter plate and the central tower cylinder and is connected with the second clamping plate.

[0024] By the above scheme, the second adapter plate can be attached to the outer wall surface of the central tower drum, and the second clamp plate can be attached to the inner wall surface of the central tower drum, which is conducive to load transmission and improves connection stability. Moreover, the second fastener can be used to connect the central tower drum by clamping the central tower drum through the second adapter plate and the second clamp plate, so as to strengthen the connection area, meet the radial force bearing requirement of the diagonal bracing rod and the upper part of the central tower drum, and reduce the possibility of deformation and stress increase of the connection area.

[0025] Optionally, the diagonal bracing rod is connected with the second adapter plate through a second transition rod, the second transition rod and the diagonal bracing rod extend along the same straight line, and the cross-sectional outer contour size of the second transition rod increases from the diagonal bracing rod to the second adapter plate.

[0026] By the above scheme, the second transition rod and the diagonal bracing rod extend along the same straight line to ensure effective transmission of load. The cross-sectional outer contour size of the second transition rod increases from the diagonal bracing rod to the second adapter plate to further strengthen the structural strength of the connection area of the diagonal bracing rod and the central tower drum and improve the bearing capacity.

[0027] Optionally, the lower part of the central tower drum is provided with a third transition rod extending outward, the third transition rod is connected with the cross bracing rod in a flange butt joint manner, the third transition rod and the cross bracing rod extend along the same straight line; and / or, the upper part of the central tower drum is provided with a fourth transition rod extending outward, the fourth transition rod is connected with the diagonal bracing rod in a flange butt joint manner, the fourth transition rod and the diagonal bracing rod extend along the same straight line.

[0028] By the above scheme, the fourth transition rod and / or the third transition rod can be designed integrally with at least part of the central tower drum to avoid the risk of stress concentration that may be caused by connection, reduce the local failure risk, and the fourth transition rod and the diagonal bracing rod extend along the same straight line, and / or the third transition rod and the cross bracing rod extend along the same straight line, so that the load can be transmitted along a straight path without turning, which greatly reduces the shear force and additional bending moment of the connection part of the diagonal bracing rod and the fourth transition rod, and each component mainly bears axial force, which is more reasonable in force form and more efficient.

[0029] Optionally, the cross-sectional outer contour size of the upper part of the central tower drum gradually increases upward.

[0030] By the above scheme, the upper part of the central tower drum can form an inverted conical structure to expand the connectable diameter of the top, so as to meet the diameter requirement of a larger upper tower section.

[0031] Optionally, the central tower drum is divided into multiple sections along the axis of the central tower drum.

[0032] Through the above scheme, the central tower drum can be segmented and processed, and then welded together to reduce the processing difficulty.

[0033] Optionally, the central tower drum is divided into three sections along the axis of the central tower drum, namely an upper tower drum section, a middle tower drum section and a lower tower drum section; the upper tower drum section is connected with a butt flange at the top end thereof, and the upper tower drum section, the middle tower drum section and the lower tower drum section are connected by first reinforcing members between adjacent two of them, and the lower tower drum section is connected with a second reinforcing member at the bottom end thereof.

[0034] In the above manner, the first reinforcing member and the second reinforcing member are connected to improve the structural strength of the central tower drum, thereby improving the load bearing capacity of the central tower drum.

[0035] According to another aspect of the present disclosure, a wind turbine generator set is provided, which includes a wind wheel, a nacelle and the tower described above; the nacelle is arranged at the top end of the tower, the length direction of the nacelle is perpendicular to the height direction of the tower, and the wind wheel is connected with the nacelle and located at one end of the nacelle along the length direction.

[0036] According to still another aspect of the present disclosure, a transition section is provided, which includes a central tower drum, at least four connecting assemblies arranged in an annular array around the central tower drum, a second end of each of the connecting assemblies being connected with a lower part of the central tower drum, and a third end of each of the connecting assemblies being connected with an upper part of the central tower drum, and at least four connecting rods, one of which being arranged between adjacent two of the connecting assemblies, both ends of each of the connecting rods being connected with the adjacent two of the connecting assemblies, the connecting rods being perpendicular to the axis of the central tower drum, so that the projection of the whole formed by the at least four connecting rods and the at least four connecting assemblies along the axis of the central tower drum forms a regular polygon with the number of sides greater than three. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0038] Figure 1 A partial structure perspective view of a tower at a transition section according to one embodiment of the present disclosure is shown; Figure 2 A perspective view of a transition section according to one embodiment of the present disclosure is shown; Figure 3A bending moment force diagram of a transition section according to one embodiment of the present disclosure is shown; Figure 4 A diagram showing the distance between each tower column and the centroid axis of a transition section using an equilateral triangle layout is shown; Figure 5 A diagram showing the distance between each tower column and the centroid axis of a transition section using a square layout is shown; Figure 6 A diagram showing the distance between each tower column and the centroid axis of a transition section using a regular pentagon layout is shown; Figure 7 A diagram showing the distance between each tower column and the centroid axis of a transition section using a regular hexagon layout is shown; Figure 8 A diagram showing a partial structure of a transition section according to one embodiment of the present disclosure is shown; Figure 9 Another diagram showing a partial structure of a transition section according to one embodiment of the present disclosure is shown; Figure 10 A diagram showing a perspective view of a first clamping plate according to one embodiment of the present disclosure is shown; Figure 11 A diagram showing a perspective view of a second clamping plate according to one embodiment of the present disclosure is shown; Figure 12 A diagram showing a perspective view of a partial structure of a tower at a transition section according to another embodiment of the present disclosure is shown; Figure 13 A diagram showing a perspective view of a central tower cylinder according to another embodiment of the present disclosure is shown; Figure 14 A diagram showing a partial structure of a central tower cylinder according to another embodiment of the present disclosure is shown; Figure 15 A diagram showing a perspective view of a central tower cylinder according to one embodiment of the present disclosure is shown; BRIEF DESCRIPTION OF REFERENCE NUMERALS 100, upper tower section; 200, transition section; 210, central tower cylinder; 211, upper tower cylinder section; 212, middle tower cylinder section; 213, lower tower cylinder section; 214, abutting flange; 215, first reinforcing member; 216, second reinforcing member; 220, connecting assembly; 221, corner joint; 2211, anchoring end; 222, cross brace; 2221, first adapter plate; 2222, first transition rod; 2223, third transition rod; 223, diagonal brace; 2231, second adapter plate; 2232, second transition rod; 2233, fourth transition rod; 230, connecting rod; 240, first clamping plate; 250, second clamping plate; 300, lower tower section. DETAILED DESCRIPTION

[0039] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the following will be combined with the accompanying drawings to make a clear and complete description of the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments.

[0040] The present disclosure provides a tower as a lifting device for lifting functional components to a sufficient height to meet functional requirements. For example, the tower can be used as a lifting part of a wind turbine generator set so that the nacelle and wind wheel can be located in the air to meet the wind power generation requirements. Of course, the tower can also be used as a lifting part of a communication tower, a power transmission tower, etc., which is not limited here.

[0041] Specifically, as shown in Figure 1 and Figure 2 , the tower can include an upper tower section 100, a transition section 200 and a lower tower section 300. The upper tower section 100 is used to connect with the functional components, such as the nacelle, etc. The lower tower section 300 is directly connected with the foundation to reliably transfer the vertical load, horizontal load and bending moment of the entire device to the foundation. For example, the lower tower section 300 can be a lattice section to provide excellent lateral stiffness and torsional stiffness through its truss structure, effectively resist deformation and instability under horizontal action such as wind load, earthquake, etc., and protect the stability of the upper structure (transition section, upper tower section) of the tower.

[0042] The transition section 200 is used to connect the upper tower section 100 and the lower tower section 300 to smoothly transition the structural form, stiffness and load transfer of the upper tower section 100 and the lower tower section 300, and reduce stress concentration. The transition section 200 can include a central tower cylinder 210 as the main structure of the transition section 200. The top end of the central tower cylinder 210 is connected with the upper tower section 100 to receive the load of the upper tower section 100, and at the same time provides a connection node for the following connecting assembly 220 and connecting rod 230. For example, the central tower cylinder 210 can be a cylinder structure with a containing space formed therein for accommodating cables and operation and maintenance facilities.

[0043] The transition section 200 can further include at least four connecting assemblies 220 and four connecting rods. The at least four connecting assemblies 220 are arranged in a ring array around the central tower cylinder 210, or in other words, the interval angle between adjacent two connecting assemblies 220 is the same. The first end of the connecting assembly 220 is connected with the lower tower section 300, the second end of the connecting assembly 220 is connected with the lower part of the central tower cylinder 210, and the third end of the connecting assembly 220 is connected with the upper part of the central tower cylinder 210, so that the connecting assembly 220 can convert the bottom bending moment of the upper tower section 100 into an axial force on the corresponding connecting rod of the connecting assembly 220, the force transmission route is clear, the material stacking is avoided to improve the strength, and the material utilization rate is high. For exampleFigure 3 As shown in the force analysis diagram, the bottom bending moment of the upper tower section 100 is converted into the tension / compression force of the rod connecting the upper part of the center tower 210 and the connecting assembly 220, and the tension / compression force of the rod connecting the lower part of the center tower 210 and the connecting assembly 220. At the same time, at least four connecting assemblies 220 and the center tower 210 can form at least four co-edge triangles to utilize the stability characteristics of the triangle to improve the overall load-carrying capacity of the entire transition section 200.

[0044] In addition, one connecting rod 230 is arranged between each of the two adjacent connecting assemblies 220, and the two ends of each connecting rod 230 are connected to the two adjacent connecting assemblies 220, respectively. The connecting rod 230 is perpendicular to the axis of the center tower 210, so that the projection of the overall structure formed by the at least four connecting rods 230 and the at least four connecting assemblies 220 along the axis of the center tower 210 forms a regular polygon, and the number of sides of the regular polygon is greater than three. In this way, the at least four connecting assemblies 220 can be connected to each other by the at least four connecting rods 230 to form an overall structure, constrain the lateral deformation of the structure, and further improve the stability of the transition section under complex load.

[0045] It is worth mentioning that, compared with the transition section 200 adopting a regular triangle layout, the transition section 200 of the present disclosure adopts a regular polygon layout with a number of sides greater than three, or in other words, adopts a layout with more than four connecting assemblies 220. The upper load can be more evenly distributed to the tower columns of the lower tower section 300, so that the stress of each tower column is more balanced, the peak load of a single tower column is reduced, and the overall load-carrying capacity of the tower is improved.

[0046] In order to prove that the transition section 200 adopting a regular polygon layout with a number of sides greater than three can have higher load-carrying capacity, as shown in Figure 4 , Figure 5 , Figure 6 and Figure 7 , taking the same wind direction, the same bending moment M, and the same circumscribed circle size as examples, the stress of the most unfavorable tower column in the regular triangle layout, the regular quadrilateral layout, the regular pentagon layout, and the regular hexagon layout is calculated according to the force formula:

[0047] j , respectively. Wherein, x1 is the distance between the most unfavorable tower column and the centroid axis, xis the distance between each tower column and the centroid axis, and the centroid axis is a straight line perpendicular to the wind direction and passing through the center of the circle.

[0048] In the regular triangle layout, the stress F3 of the most unfavorable tower column is:

[0049] In a square layout, the most unfavorable force F4 on the tower column is:

[0050] In a regular pentagonal layout, the most unfavorable force F5 on the tower column is:

[0051] In a regular hexagonal layout, the most unfavorable force F6 on the tower column is:

[0052] It can be seen that the most unfavorable tower column is subjected to forces F3 > F4 > F5 > F6. Under the same wind force, the tower column in the equilateral triangle layout is subjected to greater forces and its bearing capacity is relatively smaller. Therefore, the transition section 200 adopts a regular polygon layout with more than three sides, which can have a higher bearing capacity.

[0053] Preferably, there are four connecting components 220 and four connecting rods 230. This ensures sufficient load-bearing capacity while making the structure simpler and reducing the difficulty of manufacturing, installation and maintenance.

[0054] In some embodiments, the connection component 220 may be an integral design.

[0055] In some embodiments, such as Figure 8 As shown, the connecting assembly 220 can also be a split design. Specifically, the connecting assembly 220 may include corner connectors 221, horizontal braces 222, and diagonal braces 223. The first end of the corner connector 221 is connected to the tower column of the lower tower section 300, the second end of the corner connector 221 is connected to the lower part of the central tower tube 210 via the horizontal brace 222, the third end of the corner connector 221 is connected to the upper part of the central tower tube 210 via the diagonal brace 223, and the fourth end of the corner connector 221 is connected to the connecting rod 230. In this way, the connecting assembly 220 is assembled from multiple parts, which facilitates disassembly and transportation. Furthermore, the use of the multi-ended corner connectors 221 located at the included angles to connect multiple rods facilitates assembly operations.

[0056] For example, the diameters of the horizontal brace 222, the diagonal brace 223, and the connecting rod 230 can be flexibly selected according to the actual load conditions. In one example, the diameter of the diagonal brace 223 can be 1200 mm, the diameter of the horizontal brace 222 can be 850 mm, and the diameter of the connecting rod 230 can be 700 mm, so that the transition section 200 has good load-bearing capacity and economy.

[0057] Preferably, the central tower drum 210, the cross brace 222, the diagonal brace 223 and the connecting rod 230 can be manufactured by a cast steel process. The cast steel process can adjust the material distribution of the components as needed, maximize material utilization, and achieve smooth force transmission between the diagonal brace 223, the cross brace 222 and the central tower drum 210. The inside of the central tower drum 210 does not need to be reinforced by circumferential and longitudinal stiffening ribs. At the same time, the cast steel part has strong fatigue resistance and greatly improves the fatigue carrying capacity.

[0058] In some embodiments, the cross brace 222 and the connecting rod 230 are located in the same plane. In this way, the two adjacent cross braces 222 and the connecting rod 230 can form a closed triangle in the same plane, thereby further improving the overall carrying capacity by utilizing the stability characteristics of the triangle.

[0059] In some embodiments, the corner joint 221 is detachably connected to the tower column of the lower tower section 300 and the cross brace 222, the diagonal brace 223 and the connecting rod 230 through flange butt joint. In this way, on the one hand, the flange connection reliably transmits the shear force, axial force and bending moment of the two connected rod members through a group of bolts, ensuring the continuity of the load between the diagonal brace 223, the connecting rod 230 and the cross brace 222, avoiding load transmission interruption at the connection site, and meeting the stress requirements of the wind turbine under dynamic loads such as wind load and earthquake. On the other hand, the flange connection can realize quick assembly and connection, facilitating installation and operation.

[0060] For example, the flanges on the corner joint 221, the cross brace 222, the diagonal brace 223, the connecting rod 230 and the tower column of the lower tower section 300 can be respectively welded to the corresponding main body part, such as through butt joint welding or through fillet welding. The flanges on the corner joint 221, the cross brace 222, the diagonal brace 223, the connecting rod 230 and the tower column of the lower tower section 300 can be integrally designed with the corresponding main body part.

[0061] In some embodiments, the corner joint 221 is provided with an anchoring end 2211, which is connected to the tower column of the lower tower section 300 through a pre-tightening wire, so that the transition section 200 and the lower tower section 300 can be pre-pressed by the pre-tightening wire, thereby improving the fatigue resistance.

[0062] For example, the anchoring end 2211 can be located on the side of the corner joint 221 opposite the central tower drum 210. The pre-tightening wire can be a steel strand. For example, the tower column is a hollow structure, one end of the steel strand is anchored to the tower bottom foundation, and the other end of the steel strand extends from the inside of the tower column to the anchoring end 2211 of the corner joint 221.

[0063] Further, the transition section 200 and the lower tower section 300 can also be connected by diagonal rods, thereby optimizing the load transmission path, enhancing the overall stiffness of the structure, and improving the anti-deformation capability.

[0064] Regarding the specific connection method between the cross brace 222 and the central tower 210, this disclosure provides two feasible embodiments for reference.

[0065] Example 1, as Figures 8 to 11 As shown, the end of the cross brace 222 connected to the central tower 210 is provided with a first transition plate 2221. The first transition plate 2221 is adapted to the outer wall surface of the central tower 210. In other words, at least one side of the first transition plate 2221 connected to the central tower 210 is curved, and the curvature is the same as the curvature of the corresponding outer wall surface of the central tower 210. This allows the first transition plate 2221 to fit snugly against the outer wall surface of the central tower 210, which is beneficial for load transfer and improves connection stability. Correspondingly, the transition section 200 may also include a first clamping plate 240. The first clamping plate 240 is adapted to the inner wall surface of the central tower 210. In other words, at least one side of the first clamping plate 240 connected to the central tower 210 is curved, and the curvature is the same as the curvature of the corresponding inner wall surface of the central tower 210. This allows the first clamping plate 240 to fit snugly against the inner wall surface of the central tower 210, which is beneficial for load transfer and improves connection stability. The first clamping plate 240 is located inside the central tower 210, and the first fastener passes through the first adapter plate 2221 and the central tower 210 to connect with the first clamping plate 240. In this way, the central tower 210 can be connected by the first fastener clamping it together through the first adapter plate 2221 and the first clamping plate 240, thereby strengthening the connection area, meeting the radial force bearing requirements of the cross brace 222 and the lower part of the central tower 210, and reducing the possibility of deformation and stress increase in the connection area.

[0066] For example, maintenance manholes may be provided on the side walls of the first adapter plate 2221, the first clamping plate 240, and the corresponding central tower 210. These manholes allow operators to perform maintenance operations and / or reduce material usage and weight, thereby connecting the interior of the central tower 210 with the interior of the cross brace 222. The first adapter plate 2221 and the first clamping plate 240 may be annular, and each has several connecting holes arranged around the corresponding maintenance manhole.

[0067] The first transition plate 2221 can be directly connected to the cross brace 222. Alternatively, the cross brace 222 can be connected to the first transition plate 2221 via a first transition rod 2222. The first transition rod 2222 and the cross brace 222 extend along the same straight line to ensure effective load transfer. The outer contour dimension of the cross section of the first transition rod 2222 increases from the cross brace 222 towards the first transition plate 2221 to further strengthen the structural strength of the connection area between the cross brace 222 and the central tower 210, thereby improving the load-bearing capacity.

[0068] In practical applications, the two ends of the first transition rod 2222 can be connected to the first adapter plate 2221 and the cross brace 222 respectively by welding. Alternatively, the first transition rod 2222 can be integrally cast with the first adapter plate 2221, and then welded to the cross brace 222.

[0069] Embodiment two, as Figures 12 to 14 The lower part of the central tower drum 210 is provided with a third transition rod 2223 extending outward, the third transition rod 2223 is integrally designed with at least part of the central tower drum 210, the third transition rod 2223 is connected to the cross brace 222 in a flange abutting manner, and the third transition rod 2223 and the cross brace 222 extend along the same straight line. In this way, the third transition rod 2223 can be integrally designed with at least part of the central tower drum 210, avoiding the risk of stress concentration caused by connection, reducing the risk of local failure, and the third transition rod 2223 and the cross brace 222 extend along the same straight line, so that the load can be transmitted along the straight line path without turning, greatly reducing the shear force and additional bending moment at the connection part of the cross brace 222 and the third transition rod 2223, so that each component mainly bears axial force, and the stress form is more reasonable and efficient.

[0070] For example, the third transition rod 2223 and the cross brace 222 are respectively welded to the flanges thereon. The central tower drum 210 can be divided into multiple ring pieces in the circumferential direction, one of which can be integrally designed with the third transition rod 2223, for example, by casting. Further, the ring piece connected to the third transition rod 2223 can be thickened at the connection part of the third transition rod 2223, and / or the inner and outer sides can be rounded to improve the structural strength of the connection part of the ring piece and the third transition rod 2223, and improve the bearing capacity.

[0071] Regarding the specific connection mode of the inclined brace 223 and the central tower drum 210, the present disclosure provides two implementable embodiments for reference.

[0072] Embodiment one, as Figures 8 to 11As shown, the end of the diagonal bracing rod 223 connected with the central tower drum 210 is provided with a second adapter plate 2231, and the second adapter plate 2231 is matched with the outer wall surface of the central tower drum 210, or in other words, the second adapter plate 2231 is connected with the central tower drum 210 at least on one side in a curved surface, and the curvature is the same as the curvature of the outer wall surface of the corresponding central tower drum 210, so that the second adapter plate 2231 can be fitted with the outer wall surface of the central tower drum 210, which is conducive to load transmission and improves the connection stability. Correspondingly, the transition section 200 also includes a second clamping plate 250, which is matched with the inner wall surface of the central tower drum 210, or in other words, the second clamping plate 250 is connected with the central tower drum 210 at least on one side in a curved surface, and the curvature is the same as the curvature of the inner wall surface of the corresponding central tower drum 210, so that the second clamping plate 250 can be fitted with the inner wall surface of the central tower drum 210, which is conducive to load transmission and improves the connection stability. The second clamping plate 250 is located inside the central tower drum 210, and the second fastener is connected with the second clamping plate 250 through the second adapter plate 2231 and the central tower drum 210. In this way, the connection can be realized by the second fastener through the second adapter plate 2231 and the second clamping plate 250 clamping the central tower drum 210 together to strengthen the connection area, meet the radial force bearing requirement of the diagonal bracing rod 223 and the upper part of the central tower drum 210, and reduce the possibility of deformation and stress increase of the connection area.

[0073] For example, the second adapter plate 2231, the second clamping plate 250 and the corresponding side wall of the central tower drum 210 can be provided with a maintenance manhole, which can be used by the operator for maintenance operation, and / or can reduce material use and weight reduction, so as to communicate the inside of the central tower drum 210 with the inside of the diagonal bracing rod 223 through the maintenance manhole. The second adapter plate 2231 and the second clamping plate 250 can be in the form of a ring piece, and a plurality of connection holes for the second fastener to pass through are provided on the second adapter plate 2231 and the second clamping plate 250, and the plurality of connection holes are arranged around the corresponding maintenance manhole.

[0074] Among them, the second adapter plate 2231 can be directly connected with the diagonal bracing rod 223. Of course, the diagonal bracing rod 223 can also be connected with the second adapter plate 2231 through a second transition rod 2232, and the second transition rod 2232 and the diagonal bracing rod 223 extend along the same straight line to ensure effective load transmission. The cross-sectional outer contour size of the second transition rod 2232 increases from the diagonal bracing rod 223 to the second adapter plate 2231, so as to further strengthen the structural strength of the connection area of the diagonal bracing rod 223 and the central tower drum 210 and improve the bearing capacity.

[0075] In practical applications, the two ends of the second transition rod 2232 can be connected to the second adapter plate 2231 and the diagonal brace 223 by welding. Alternatively, the second transition rod 2232 and the second adapter plate 2231 can be integrally cast, and then the second transition rod 2232 can be welded to the diagonal brace 223.

[0076] Example 2, as follows Figures 12 to 14 As shown, the upper part of the central tower 210 is provided with an outwardly extending fourth transition rod 2233. The fourth transition rod 2233 is integrally designed with at least a portion of the central tower 210. The fourth transition rod 2233 is connected to the diagonal brace 223 via a flange connection. The fourth transition rod 2233 and the diagonal brace 223 extend along the same straight line. In this way, the fourth transition rod 2233 can be integrally designed with at least a portion of the central tower 210, avoiding the risk of stress concentration that may occur during the connection, reducing the potential for local failure. Furthermore, the fact that the fourth transition rod 2233 and the diagonal brace 223 extend along the same straight line allows the load to be transmitted along a straight path without the need for turning to transmit force. This significantly reduces the shear force and additional bending moment at the connection between the diagonal brace 223 and the fourth transition rod 2233, allowing each component to mainly bear axial force, resulting in a more reasonable and efficient force distribution.

[0077] For example, the fourth transition rod 2233 and the diagonal brace 223 are welded to their respective flanges. The central tower 210 may be divided into multiple rings circumferentially, one of which may be integrally designed with the fourth transition rod 2233, for example, by casting. Furthermore, the connection point between the ring and the fourth transition rod 2233 may be thickened and / or have rounded corners on the inner and outer sides to improve the structural strength and load-bearing capacity of the connection between the ring and the fourth transition rod 2233.

[0078] In some embodiments, such as Figures 12 to 13 As shown, the outer contour dimension of the upper part of the central tower 210 gradually increases upward, that is, the top diameter of the upper part of the central tower 210 is greater than the bottom diameter of the upper part of the central tower 210, so that the upper part of the central tower 210 forms an inverted conical structure to expand the connectable diameter of the top and meet the diameter requirements of the larger upper tower section 100.

[0079] For example, the top diameter of the upper part of the central tower 210 can be 5.5 meters, and the bottom diameter of the upper part of the central tower 210 can be 5 meters.

[0080] Considering the large overall volume of the central tower 210, in some embodiments, such as Figure 13 and Figure 15 As shown, the central tower 210 is divided into multiple segments along its axis, which allows the central tower 210 to be processed in segments and then welded together to reduce the difficulty of processing and production.

[0081] For example, the central tower drum 210 can be divided into two, three, four, five, six or more sections along the axis of the central tower drum 210.

[0082] For example, when the central tower drum 210 is divided into three sections along the axis of the central tower drum 210, the three sections are defined as an upper tower drum section 211, a middle tower drum section 212 and a lower tower drum section 213 from top to bottom. The upper tower drum section 211 is connected with a butt flange 214 to be connected with the upper tower end 100 via the butt flange 214. The upper tower drum section 211, the middle tower drum section 212 and the lower tower drum section 213 are connected with each other via first reinforcing members 215, and the lower tower drum section 213 is connected with a second reinforcing member 216, so as to improve the bearing capacity of the central tower drum 210.

[0083] For example, the first reinforcing members 215 and the second reinforcing member 216 can be L-shaped or T-shaped reinforcing ribs. The upper tower drum section 211, the middle tower drum section 212 and the lower tower drum section 213 can be designed as a whole. Of course, at least one of the upper tower drum section 211, the middle tower drum section 212 and the lower tower drum section 213 can be designed as a plurality of ring pieces.

[0084] In particular, when the third transition rod 2223 and the fourth transition rod 2233 are designed as one with at least part of the central tower drum 210, the upper tower drum section 211 and the lower tower drum section 213 are divided into a plurality of ring pieces along the circumferential direction for the convenience of production. In this way, part of the ring pieces can be integrally cast with the corresponding transition rod, and then the ring pieces are spliced and welded along the circumferential direction to form an integrated structure, which is convenient for segmented production.

[0085] Based on the same inventive concept, the disclosure also provides a wind turbine generator set, which can include a wind wheel, a nacelle and the tower described above. The nacelle is arranged at the top end of the tower, the length direction of the nacelle is perpendicular to the height direction of the tower, the wind wheel is connected with the nacelle and located at one end of the nacelle along the length direction.

[0086] It should be noted that the specific structure of the tower can refer to the detailed description in the above embodiments, which will not be repeated here.

[0087] Based on the same inventive concept, the disclosure also provides a transition section 200, which can include: a central tower drum 210; at least four connecting assemblies 220 arranged in an annular array around the central tower drum 210, the second end of the connecting assembly 220 being connected with the lower part of the central tower drum 210, and the third end of the connecting assembly 220 being connected with the upper part of the central tower drum 210; at least four connecting rods 230, one connecting rod 230 being arranged between each two adjacent connecting assemblies 220, both ends of each connecting rod 230 being connected with the two adjacent connecting assemblies 220, and the connecting rod 230 being perpendicular to the axis of the central tower drum 210, so that the projection of the whole formed by the at least four connecting rods 230 and the at least four connecting assemblies 220 along the axis of the central tower drum 210 forms a regular polygon, and the number of sides of the regular polygon is greater than three.

[0088] It should be noted that the specific structure of the central tower drum 210, the connecting assembly 220 and the connecting rod 230 can refer to the content described in detail in the above embodiments, and will not be repeated here.

[0089] In the disclosure, the terms "upper", "lower", and the like are used to describe the relative positional relationship of the structures in the drawings, and are only for the convenience of clear description, and do not limit the scope of the disclosure. Changes or adjustments of the relative relationship without substantial changes in technical content are also considered as the scope of the disclosure.

[0090] It should be noted that: in the disclosure, unless otherwise specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0091] In addition, in the disclosure, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the disclosure can be understood according to the specific circumstances.

[0092] In the description of the present disclosure, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present disclosure. In the present description, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples.

[0093] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A tower, characterized in that, The tower includes an upper tower section (100), a transition section (200), and a lower tower section (300), wherein the transition section (200) includes: The central tower (210) is connected at its top to the upper tower section (100); At least four connecting components (220) are arranged in a ring array around the central tower (210). The first end of the connecting component (220) is connected to the lower tower section (300), the second end of the connecting component (220) is connected to the lower part of the central tower (210), and the third end of the connecting component (220) is connected to the upper part of the central tower (210). At least four connecting rods (230) are provided, with one connecting rod (230) between each two adjacent connecting components (220). The two ends of each connecting rod (230) are connected to the two adjacent connecting components (220). The connecting rods (230) are perpendicular to the axis of the central tower (210) so that the whole consisting of at least four connecting rods (230) and at least four connecting components (220) forms a regular polygon on the outer periphery of the projection along the axis of the central tower (210), and the number of sides of the regular polygon is greater than three.

2. The tower according to claim 1, characterized in that, The number of the connecting components (220) and the connecting rods (230) are both four.

3. The tower according to claim 2, characterized in that, The connecting assembly (220) includes a corner joint (221), a cross brace (222), and a diagonal brace (223); The first end of the corner connector (221) is connected to the tower column of the lower tower section (300), the second end of the corner connector (221) is connected to the lower part of the central tower (210) through the horizontal brace (222), the third end of the corner connector (221) is connected to the upper part of the central tower (210) through the diagonal brace (223), and the fourth end of the corner connector (221) is connected to the connecting rod (230).

4. The tower according to claim 3, characterized in that, The cross brace (222) and the connecting rod (230) are located in the same plane.

5. The tower according to claim 3, characterized in that, The corner connector (221) is detachably connected to the horizontal brace (222), the diagonal brace (223), the connecting rod (230), and the tower column of the lower tower section (300).

6. The tower according to claim 3, characterized in that, The corner connector (221) is provided with an anchoring end (2211), which is connected to the tower column of the lower tower section (300) through a pre-tightening line.

7. The tower according to any one of claims 3 to 6, characterized in that, The end of the cross brace (222) connected to the central tower (210) is provided with a first adapter plate (2221), and the first adapter plate (2221) is adapted to the outer wall surface of the central tower (210); The transition section (200) further includes a first clamping plate (240), which is adapted to the inner wall surface of the central tower (210). The first clamping plate (240) is located inside the central tower (210), and a first fastener passes through the first adapter plate (2221) and the central tower (210) to connect with the first clamping plate (240).

8. The tower according to claim 7, characterized in that, The cross brace (222) is connected to the first adapter plate (2221) via the first transition rod (2222). The first transition rod (2222) and the cross brace (222) extend along the same straight line. The outer contour dimension of the cross section of the first transition rod (2222) increases from the cross brace (222) toward the first adapter plate (2221).

9. The tower according to any one of claims 3 to 6, characterized in that, The diagonal brace (223) is connected to the central tower (210) at one end, and the second transition plate (2231) is adapted to the outer wall surface of the central tower (210). The transition section (200) further includes a second clamping plate (250), which is adapted to the inner wall surface of the central tower (210). The second clamping plate (250) is located inside the central tower (210), and a second fastener passes through the second adapter plate (2231) and the central tower (210) to connect with the second clamping plate (250).

10. The tower according to claim 9, characterized in that, The diagonal brace (223) is connected to the second transition plate (2231) via the second transition rod (2232). The second transition rod (2232) and the diagonal brace (223) extend along the same straight line. The outer contour dimension of the cross section of the second transition rod (2232) increases from the diagonal brace (223) toward the second transition plate (2231).

11. The tower according to any one of claims 3 to 6, characterized in that, The lower part of the central tower (210) is provided with an outwardly extending third transition rod (2223), which is connected to the cross brace (222) by a flange connection. The third transition rod (2223) and the cross brace (222) extend along the same straight line; and / or, The upper part of the central tower (210) is provided with an outwardly extending fourth transition rod (2233), which is connected to the diagonal brace (223) by flange connection. The fourth transition rod (2233) and the diagonal brace (223) extend along the same straight line.

12. The tower according to any one of claims 3 to 6, characterized in that, The outer contour dimension of the upper part of the central tower (210) gradually increases upward.

13. The tower according to any one of claims 3 to 6, characterized in that, The central tower (210) is divided into multiple segments along its axis.

14. The tower according to claim 13, characterized in that, The central tower (210) is divided into three sections along its axis: the upper tower section (211), the middle tower section (212), and the lower tower section (213). The top end of the upper tower section (211) is connected to a mating flange (214). Two adjacent upper tower sections (211), middle tower sections (212) and lower tower sections (213) are connected by a first reinforcing member (215). The bottom end of the lower tower section (213) is connected to a second reinforcing member (216).

15. A wind turbine generator set, characterized in that, The wind turbine generator set includes a wind rotor, a nacelle, and a tower as described in any one of claims 1 to 14; The nacelle is located at the top of the tower, and the length direction of the nacelle is perpendicular to the height direction of the tower. The wind turbine is connected to the nacelle and is located at one end of the nacelle along its length.

16. A transition section, characterized in that, The transition section (200) includes: Central tower (210); At least four connecting components (220) are arranged in a ring array around the central tower (210), with a second end of the connecting component (220) connected to the lower part of the central tower (210) and a third end of the connecting component (220) connected to the upper part of the central tower (210). At least four connecting rods (230) are provided, with one connecting rod (230) between each two adjacent connecting components (220). The two ends of each connecting rod (230) are connected to the two adjacent connecting components (220). The connecting rods (230) are perpendicular to the axis of the central tower (210) so that the whole consisting of at least four connecting rods (230) and at least four connecting components (220) forms a regular polygon on the outer periphery of the projection along the axis of the central tower (210), and the number of sides of the regular polygon is greater than three.

Images