Tower transition section, tower and wind turbine generator system

Abstract

A tower transition section (10), comprising: a foundation (11) comprising a housing (111) and a plurality of connecting columns (112) connected to the housing, wherein the housing is in the form of a closed ring, the housing has an interface end (111a) on a side in its own axial direction (X), the plurality of connecting columns are arranged at intervals in a circumferential direction (Y) of the housing, and each connecting column protrudes from the housing on the side that is axially away from the interface end; a first flange (12) disposed at the interface end; and second flanges (13), each of the connecting columns being connected to one of the second flanges on the side that is axially away from the interface end. The wall thickness of the housing in its own radial direction (Z) gradually increases in the axial direction and in a direction pointing from the first flange toward the second flanges. The tower transition section meets the requirements of use of a tower, has a small size and low costs, and is easy to transport. Further disclosed are a tower (100) and a wind turbine generator system.

Description

Tower adapter, tower and wind turbine

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202410175943.1 filed on February 7, 2024, entitled “Tower Transition Section, Tower and Wind Turbine Generator Set”, and Chinese Patent Application No. 202420286941.5 filed on February 7, 2024, entitled “Tower Transition Section, Tower and Wind Turbine Generator Set”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of wind power technology, and in particular to a tower adapter section, a tower, and a wind turbine generator set. Background Art

[0004] As the hub height of wind turbines continues to rise, the structural form of traditional single-tube steel towers faces challenges. In order to adapt to the increasing height requirements of the hub, truss-type wind turbine solutions have emerged in the wind power industry. The lower part of this tower structure is a truss body, and the upper part is directly or indirectly connected to the yaw system. The truss body and the yaw system are connected through a tower transition section.

[0005] Wind turbines experience significant fatigue effects under wind loads and mechanical operation. The tower transition section will withstand tens of millions of reciprocating fatigue loads during the life cycle of the structure, which places corresponding requirements on the fatigue resistance of various parts of the tower transition section.

[0006] However, due to deficiencies in the structural design of the tower transition section in the related art, the tower transition section has a large overall size, high cost and is not conducive to transportation. Summary of the Invention

[0007] The embodiments of the present invention provide a tower transition section, a tower and a wind turbine generator set. The tower transition section meets the use requirements of the tower and is small in size, low in cost and easy to transport.

[0008] On the one hand, according to an embodiment of the present invention, a tower transition section is proposed, including: a base part, including a shell and a plurality of connecting columns connected to the shell, the shell is in a closed ring shape, the shell has a butt end on one side of its own axial direction, and the plurality of connecting columns are arranged at intervals in the circumferential direction of the shell, and each connecting column protrudes from the shell on the side axially away from the butt end; a first flange is arranged at the butt end; a second flange, each connecting column is connected to a second flange on the side axially away from the butt end; wherein, along the axial direction and from the first flange to the second flange side, the wall thickness of the shell in its own radial direction tends to gradually increase.

[0009] According to one aspect of an embodiment of the present invention, the shell has an intermediate area between every two adjacent connecting columns along the circumference of the shell, and the wall thickness of the shell in its own radial direction tends to gradually increase from the intermediate area to the side where the adjacent connecting columns are located.

[0010] According to one aspect of an embodiment of the present invention, an elliptical matching groove is provided on the shell, which is formed by a depression on one side of the shell away from the docking end in the axial direction. The connecting column extends into the matching groove and is connected to the shell.

[0011] According to one aspect of an embodiment of the present invention, the thickness of the connecting column in the radial direction of the shell gradually increases from the side where the first flange is located to the side where the second flange is located, and the outer periphery of the end where the connecting column is connected to the second flange is circular.

[0012] According to one aspect of an embodiment of the present invention, a hollow cavity is provided in the connecting column. Along the radial direction of the shell, the connecting column partially protrudes from the outer wall surface of the shell and forms an avoidance opening, which is connected to the hollow cavity. A cable connection portion is provided in the connecting column, and the cable connection portion is exposed in the avoidance opening.

[0013] According to one aspect of an embodiment of the present invention, the cable connecting portion is plate-shaped and is provided at the end of the connecting column away from the first flange. The cable connecting portion is provided with an axially penetrating through hole, which is connected to the hollow cavity.

[0014] According to one aspect of an embodiment of the present invention, the avoidance opening is elliptical in shape, and the long axis direction of the avoidance opening is from the side where the second flange connected to the connecting column is located to the side where the first flange is located. Reinforcing ribs are arranged around the outer periphery of the avoidance opening, and the reinforcing ribs are connected to the connecting column and the shell.

[0015] According to one aspect of an embodiment of the present invention, a cavity is provided on the shell. In the circumferential direction, a cavity is provided between two adjacent connecting columns. The cavity is recessed from the side of the shell axially away from the docking end toward the side where the docking end is located.

[0016] According to one aspect of an embodiment of the present invention, a connection interface is provided on each connection column, and a reinforcement is connected between the connection interfaces of two adjacent connection columns. The reinforcement includes at least one of a connection rod and a reinforcing rib plate.

[0017] According to one aspect of the embodiments of the present invention, the housing and each connecting column are an integrated structure.

[0018] According to one aspect of an embodiment of the present invention, along the circumference of the shell, the shell includes a plurality of force transmission units distributed in sequence, each force transmission unit is connected to one of the connecting columns to form a flow guide body, and the width of the flow guide body in the circumferential direction tends to decrease from the side where the first flange is located to the side where the second flange is located, and the flow guide body is in the shape of a funnel.

[0019] On the other hand, according to an embodiment of the present invention, a tower is provided, comprising: a truss body including a plurality of columns and connecting beams connecting the columns; and the tower transition section, wherein each connecting column is connected to one of the columns via a second flange.

[0020] According to another aspect of the embodiment of the present invention, the column includes a column body and a cable disposed in the column body, the column body is connected to the second flange, and the cable extends into and is connected to the connecting column.

[0021] In yet another aspect, an embodiment of the present invention provides a wind turbine generator set, comprising the above-mentioned tower.

[0022] In yet another aspect, an embodiment of the present invention further provides a wind farm, comprising the wind turbine generator set as described above.

[0023] According to embodiments of the present invention, a tower adapter section, tower, and wind turbine generator set are provided. The tower adapter section includes a base, a first flange, and a second flange. The base section includes a housing and multiple connecting columns. The housing is a closed ring with a butt end provided on one axial side. The first flange provided on the butt end can be directly or indirectly connected to the yaw system. The multiple connecting columns are spaced apart circumferentially around the housing. Each connecting column protrudes axially from the housing and can be connected to a truss column via a corresponding second flange, thereby achieving the connection between the yaw system and the truss body. Forces acting on the yaw system are transmitted to each column via the tower adapter section. Since the wall thickness of the housing gradually increases along the axial direction of the housing, from the first flange to the second flange, the wall thickness is distributed along the direction of force flow, increasing the rigidity of the housing in the force transmission area. This eliminates the need to manufacture the tower adapter section with a wall thickness corresponding to the highest load-bearing capacity. Under the same load-bearing capacity, the radial dimension of the tower adapter section can be reduced, resulting in a small overall size, low cost, and convenient transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0025] FIG1 is a schematic structural diagram of a wind turbine generator set according to an embodiment of the present invention;

[0026] FIG2 is a schematic structural diagram of a tower according to an embodiment of the present invention;

[0027] FIG3 is a schematic structural diagram of a tower transition section according to an embodiment of the present invention;

[0028] FIG4 is a schematic top view of a tower transition section according to an embodiment of the present invention;

[0029] FIG5 is a cross-sectional view taken along the AA direction in FIG4 ;

[0030] FIG6 is a cross-sectional view taken along the BB direction in FIG4;

[0031] FIG7 is a cross-sectional view taken along the CC direction in FIG4 ;

[0032] FIG8 is a front view of a tower transition section according to an embodiment of the present application;

[0033] FIG9 is a cross-sectional view taken along the DD direction in FIG8;

[0034] FIG10 is a cross-sectional view taken along the EE direction in FIG8;

[0035] FIG11 is a cross-sectional view taken along the FF direction in FIG8 ;

[0036] FIG12 is a schematic diagram of a partial structure of a tower transition section according to an embodiment of the present application;

[0037] FIG13 is an axonometric view of a tower adapter section according to an embodiment of the present application from another perspective;

[0038] Figure 14 is a top view of a tower adapter according to another embodiment of the present application. 100 - tower; 10 - tower adapter section; 11 - base; 111 - housing; 111a - docking end; 111b - cavity; 111c - mating groove; 1111 - force transmission unit; 112 - connecting column; 112a - hollow cavity; 112b - avoidance opening; 112c - reinforcing rib; 113 - cable connection; 113a - through hole; 114 - connection interface; 12 - first flange; 13 - second flange; 20 - truss body; 21 - column; 22 - connecting beam; 30 - tower section; 200 - nacelle; 300 - generator; 400 - impeller; 410 - hub; 420 - blades; X - axial direction; Y - circumferential direction; Z - radial direction.

[0039] In the drawings, like parts are given like reference numerals, but the drawings are not necessarily drawn to scale. DETAILED DESCRIPTION

[0040] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are set forth in order to provide a comprehensive understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the well-known structures and technologies are not shown in order to avoid unnecessary ambiguity in the present application; and, for clarity, the sizes of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0041] The directional words appearing in the following description refer to the directions shown in the figures, and do not limit the specific structure of the tower adapter section, tower and wind turbine generator set of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0042] As shown in Figures 1 and 2, one embodiment of the present application provides a wind turbine generator set, comprising a wind turbine foundation, a tower 100, a nacelle 200, a generator 300, and an impeller 400. The tower 100 is connected to the wind turbine foundation, the nacelle 200 is disposed at the top of the tower 100, and the generator 300 is disposed within the nacelle 200. In some examples, the generator 300 may be located outside the nacelle 200, or in some other examples, inside the nacelle 200. The impeller 400 includes a hub 410 and a plurality of blades 420 connected to the hub 410. The impeller 400 is connected to the rotor of the generator 300 via the hub 410, thereby driving the rotor of the generator 300 to rotate relative to the stator, thereby achieving the power generation requirements of the wind turbine generator set. To improve wind energy utilization, the wind turbine generator set may also include a yaw system, which enables the nacelle 200 to drive the generator 300 and the impeller 400 to rotate relative to the tower 100, thereby achieving wind demand.

[0043] As the height of the hub 410 of wind turbine generator sets continues to rise, the structural form of the traditional single-tube steel tower is facing challenges. In order to adapt to the increasing height requirements of the hub 410, the wind power industry has successively introduced truss-type wind turbine generator solutions. The lower part of this tower 100 structure is a truss body 20, and the upper part is directly or indirectly connected to the yaw system. The truss body 20 and the yaw system are connected through a tower transition section. Various bending moments and torque loads transmitted from the nose are further transmitted to the truss body through the tower transition section. Wind turbines are subject to significant fatigue effects under the action of wind loads and mechanical operation. During the life cycle of the structure, the tower transition section will withstand tens of millions of reciprocating fatigue loads, and corresponding requirements are also put forward for the fatigue resistance of various parts of the tower transition section.

[0044] However, the tower transition section 10 in the related art is primarily welded from multiple steel plates. The plate thickness of the welded structure is subject to welding process limitations and the production capacity of the steel plate plant, and generally has a maximum wall thickness limit. If the plate thickness cannot meet the load-bearing requirements, the load-bearing capacity needs to be increased by increasing the diameter. Under the same load-bearing level, the welded part needs to increase the diameter to achieve the same load-bearing capacity, which will cause problems such as transportation problems. Based on this, one embodiment of the present application also provides a tower 100 that re-plans the structural design of its tower transition section 10. The tower transition section 10 can be produced and sold as an independent product, or it can be used in the tower 100 provided in the above embodiments and serve as a component of the tower 100.

[0045] As shown in Figures 3 to 7, a tower transition section 10 provided in one embodiment of the present application includes a base 11, a first flange 12, and a second flange 13. The base 11 includes a housing 111 and a plurality of connecting posts 112 connected to the housing 111. The housing 111 is in a closed ring shape and has a butt end 111a on one side of the housing 111 in the axial direction X. The plurality of connecting posts 112 are spaced apart along the circumference Y of the housing 111, with each connecting post 112 protruding from the housing 111 on a side facing away from the butt end 111a in the axial direction X. The first flange 12 is provided at the butt end 111a, and each connecting post 112 is connected to a second flange 13 on a side facing away from the butt end 111a in the axial direction X. The wall thickness of the housing 111 gradually increases along the axial direction X, from the first flange 12 toward the second flange 13.

[0046] The shell 111 can be in the shape of a ring with a predetermined height along the axial direction X. Of course, in some embodiments, a polygonal ring can also be used. One embodiment of the present application can optionally adopt a ring shape to help reduce the probability of stress concentration when it is under load.

[0047] The number of the connecting columns 112 may be three, four, or more, and may be determined specifically according to the number of the upright columns 21 included in the truss body 20 , and may be four.

[0048] The plurality of connection pillars 112 may be unevenly distributed in the circumferential direction Y of the housing 111 , or may be evenly and spaced apart.

[0049] The wall thickness of the housing 111 in its radial direction Z can be understood as the vertical distance from the inner wall surface to the outer wall surface of the housing 111 in its radial direction Z. Along the axial direction X, from the first flange 12 toward the second flange 13, the wall thickness of the housing 111 increases. Specifically, as shown in Figures 4 to 7 , d1 < d2 < d3.

[0050] The housing 111 can be a straight cylinder with a uniform cross-sectional dimension in the axial direction X. In some embodiments, the housing 111 can also be a tapered cylinder with gradually increasing dimensions in the axial direction X, adapting to the shape changes from the yaw system to the truss body, serving as a transitional connection. This can also improve the overall stability of the tower adapter section 10.

[0051] Each connecting column 112 is arranged to protrude from the shell 111 on the side of the axial direction X away from the docking end 111a. It can be understood that the axis of each connecting column 112 can extend along the axial direction X of the shell 111. Of course, the axis of each connecting column 112 can also have a certain inclination angle with the axial direction X of the shell, and can also be arranged to protrude from the shell 111 in the axial direction X.

[0052] A tower adapter section 10 provided in one embodiment of the present application can be directly or indirectly connected to the yaw system via a first flange 12 provided on the butt end 111a. Multiple connecting columns 112 are spaced apart along the circumference Y of the housing 111. Each connecting column 112 protrudes from the housing 111 in the axial direction X and can be connected to a truss column 21 via a corresponding second flange 13, thereby achieving the required connection between the yaw system and the truss body 20. Forces acting on the yaw system are transmitted to each column 21 via the tower adapter section 10. Since the wall thickness of the shell 111 in its own radial direction Z tends to gradually increase along the axial direction X of the shell 111 and from the first flange 12 to the second flange 13, the wall thickness is distributed along the direction of the force flow, thereby increasing the stiffness of the shell 111 in the force transmission area. There is no need to manufacture the tower transition section 10 according to the wall thickness corresponding to the highest load-bearing capacity. Under the condition of the same load-bearing capacity, the radial Z dimension of the tower transition section 10 can be reduced, so that the overall size of the tower transition section 10 is small and the cost is low. It is not subject to the height restriction of road transportation during transportation, thereby reducing the difficulty of transportation.

[0053] As shown in Figures 8 to 11, in some optional embodiments, the tower transition section 10 provided in one embodiment of the present application has an intermediate area between each two adjacent connecting columns 112 along the circumferential direction Y of the shell 111, and the wall thickness of the shell 111 in its own radial direction Z tends to gradually increase from the intermediate area to the side where the adjacent connecting column 112 is located.

[0054] The middle region can be understood as a region where the distance from two adjacent connecting pillars 112 in the circumferential direction Y is equal. It can be understood that the wall thickness of the housing 111 in the radial direction Z starts from the middle region and increases closer to the connecting pillars 112 in the circumferential direction Y. Specifically, as shown in Figures 8 to 11 , d4 < d5 < d6.

[0055] An embodiment of the present application provides a tower transition section 10, in which the wall thickness of the shell 111 in its own radial direction Z tends to gradually increase from the middle area to the side where the adjacent connecting column 112 is located. When the acting force load is diverted from the shell 111 to each connecting column 112, the force dispersed in the circumferential direction Y will gradually converge to each connecting column 112, thereby ensuring that the stiffness of the shell 111 in the circumferential direction Y along the transmission direction of the force flow gradually increases, thereby ensuring the transmission effect of the acting force load.

[0056] As shown in Figure 12, in some optional embodiments, an embodiment of the present application provides a tower adapter section 10, and an elliptical mating groove 111c is provided on the shell 111. The mating groove 111c is formed by a depression on one side of the shell 111 away from the docking end 111a in the axial direction X, and the connecting column 112 extends into the mating groove 111c and is connected to the shell 111.

[0057] The elliptical fitting groove 111 c can be understood as the wall surface of the housing 111 enclosed to form the fitting groove 111 c is a part of the ellipse, which can be understood as an elliptical arc.

[0058] The tower transition section 10 provided in one embodiment of the present application can ensure the transition connection requirements between the shell 111 and the connecting column 112 by setting an elliptical matching groove 111c on the shell 111, so that the two can transition smoothly, reduce stress concentration at the matching point between the two, and improve the overall bearing capacity of the tower transition section 10.

[0059] In some optional embodiments, the tower transition section 10 provided in one embodiment of the present application points from the side where the first flange 12 is located to the side where the second flange 13 is located, the thickness of the connecting column 112 in the radial direction Z of the shell 111 tends to gradually increase, and the outer periphery of the end where the connecting column 112 is connected to the second flange 13 is circular.

[0060] The tower transition section 10 provided in one embodiment of the present application, through the above-mentioned arrangement, enables the connecting column 112 to increase its stiffness along the direction of force flow to ensure the load-bearing requirements. At the same time, the outer periphery of one end connecting the connecting column 112 to the second flange 13 is circular, which is conducive to the connection with the second flange 13 and can ensure the docking requirements with the truss body 20.

[0061] As shown in Figure 13, in some optional embodiments, the tower transition section 10 provided by an embodiment of the present application has a hollow cavity 112a in the connecting column 112. Along the radial direction Z of the shell 111, the connecting column 112 partially protrudes from the outer wall surface of the shell 111 and forms an avoidance opening 112b. The avoidance opening 112b is connected to the hollow cavity 112a. A cable connection portion 113 is provided in the connecting column 112, and the cable connection portion 113 is exposed in the avoidance opening 112b.

[0062] The hollow cavity 112a in the connecting column 112 may be circular, elliptical or polygonal.

[0063] A tower transition section 10 provided in one embodiment of the present application provides a hollow cavity 112a on the base 11 and a cable connection portion 113 within the connecting column 112. This provides support for cables installed in the columns 21, ensuring secure cable installation and improving the connection strength between the tower transition section 10 and the columns 21 in the truss body 20. Furthermore, the connecting column 112 partially protrudes from the outer wall of the shell 111 along the radial direction Z of the shell 111 and forms a relief opening 112b. The relief opening 112b communicates with the hollow cavity 112a. While ensuring connection between the connecting column 112 and the shell 111, the end of the connecting column 112 facing the first flange 12 in the axial direction X allows for a smooth transition between the shell 111 and the truss body 20, reducing the likelihood of stress concentration. Furthermore, the provision of the relief opening 112b facilitates the connection between the cables and the cable connection portion 113, reducing the difficulty of cable installation.

[0064] At the same time, the structure of the cable connection part 113 arranged in the connection column 112 largely distributes the force on the outer ring bolts of the second flange 13, reduces the design difficulty of the outer ring bolts, and improves the reliability of the entire connection of the tower transition section 10.

[0065] In some optional embodiments, in the tower transition section 10 provided in one embodiment of the present application, the cable connection portion 113 is plate-shaped and is arranged at the end of the connecting column 112 away from the first flange 12, and a through hole 113a is provided on the cable connection portion 113, which passes through along the axial direction X, and the through hole 113a is connected to the hollow cavity 112a.

[0066] Optionally, the shape of the through hole 113a may be circular, elliptical or polygonal.

[0067] The cable connecting portion 113 and the connecting column 112 may be connected to each other by welding or the like, or may be integrally formed by casting or the like.

[0068] The tower transition section 10 provided in one embodiment of the present application has a cable connection portion 113 that is plate-shaped and is arranged at the end of the connecting column 112 away from the first flange 12, so that the cable can extend into the connecting column 112 through the through hole 113a in the cable connection portion 113 and be fixed to the cable connection portion 113, thereby ensuring the installation and fixation of the cable.

[0069] In some optional embodiments, in a tower transition section 10 provided in one embodiment of the present application, the avoidance opening 112b is elliptical, and the long axis direction of the avoidance opening 112b is directed from the side where the second flange 13 connected to the connecting column 112 is located to the side where the first flange 12 is located, and reinforcing ribs are arranged around the outer periphery of the avoidance opening 112b, which are connected to the connecting column 112 and the shell 111.

[0070] In some optional embodiments, in a tower transition section 10 provided in one embodiment of the present application, the avoidance opening 112b is elliptical, and the long axis direction of the avoidance opening 112b is directed from the side where the second flange 13 connected to the connecting column 112 is located to the side where the first flange 12 is located, and the outer periphery of the avoidance opening 112b is surrounded by reinforcing ribs 112c, which are connected to the connecting column 112 and the shell 111.

[0071] The tower transition section 10 provided in one embodiment of the present application, through the above-mentioned arrangement, can, on the one hand, provide the largest bearing surface for the load transmitted from the shell 111, and the elliptical structure itself has the advantage of less stress concentration in its shape. On the other hand, it also facilitates the installation of the cable. Personnel can easily pass the cable through the through hole 113a of the transition section, and tightly clamp it in the cable connection part 113 of the transition section through the anchor head. The open structure of the elliptical avoidance opening 112b is a non-enclosed space, which increases the convenience and safety of installation and maintenance.

[0072] At the same time, the tower transition section 10 provided in one embodiment of the present application can strengthen the strength of the avoidance opening 112b by providing reinforcing ribs 112c on the outer periphery of the avoidance opening 112b, thereby ensuring the transmission of the force load, and at the same time reducing the probability of deformation or tearing damage of the tower transition section 10 at the avoidance opening 112b, thereby improving the safety performance of the tower transition section 10.

[0073] Optionally, the long axis direction of the avoidance opening 112b may form an angle with the axial direction X, and the size of the angle may be smaller than 60°.

[0074] The above arrangement is conducive to optimizing the transmission direction of the force flow, while at the same time ensuring the avoidance requirements of the cables and reducing the difficulty of connecting the cables.

[0075] Continuing to refer to Figures 3 to 13, in some optional embodiments, a tower transition section 10 provided in one embodiment of the present application has a concave cavity 111b provided on the shell 111, and a concave cavity 111b is provided between two adjacent connecting columns 112 in the circumferential direction Y. The concave cavity 111b is recessed from the side of the shell 111 in the axial direction X away from the butt end 111a toward the side where the butt end 111a is located.

[0076] The bottom wall of the cavity 111b can be in the form of a U-shaped surface or a curved surface, and can be a curved surface. When it is a curved surface, it can be a circular arc surface or an elliptical arc surface.

[0077] In one embodiment of the present application, a tower transition section 10 is provided with a recessed cavity 111b between two adjacent connecting columns 112, as the area between the two adjacent connecting columns 112 does not primarily transmit force. This reduces weight and material usage, and leverages the stability of the arched shape to optimize the load-bearing capacity of the tower transition section 10 while maintaining reduced material usage. Furthermore, this recessed cavity 111b facilitates access from the maintenance platform for personnel to maintain column foot bolts and tension and maintain anchor cables.

[0078] In some optional embodiments, in a tower transition section 10 provided in one embodiment of the present application, a connection interface 114 is provided on each connecting column 112, and a reinforcement is connected between the connection interfaces 114 of two adjacent connecting columns 112, and the reinforcement includes at least one of a connecting rod and a reinforcing rib plate.

[0079] The connection interface 114 includes but is not limited to structures such as connection ears and connection seats. Connection holes may be provided on the connection ears and connection seats to connect with the connection rods and reinforcing ribs through bolts, pins and other connectors.

[0080] The tower adapter section 10 provided in one embodiment of the present application, by providing a connection interface 114 and connecting a reinforcement member to the connection interface 114, can connect two adjacent connection columns 112 into a whole through the reinforcement member, so as to reduce the casting, transportation and hoisting deformation of the large-span structure and reduce the installation difficulty of the tower adapter frame.

[0081] In some optional embodiments, in an embodiment of the present application, the tower transition section 10 is provided, and the shell 111 and each connecting column 112 are an integrated structure.

[0082] The tower transition section 10 in the related art is welded from steel plates of varying thicknesses, resulting in numerous welds and poor fatigue resistance. The performance of the welds is heavily dependent on their quality. If the welding quality is problematic, the tower transition section 10, as a key load-bearing component, faces a significant risk of failure. However, the tower transition section 10 provided in one embodiment of the present application utilizes an integrated structure with each connecting column 112 and the housing 111, facilitating molding without the need for welding, reducing stress concentration, and simplifying casting. Multiple connecting columns 112 can be integrated with the housing 111 without distinct transition zones, resulting in high load-bearing capacity, excellent safety performance, and a low risk of failure.

[0083] Each connecting post 112 is an integral structure with the housing 111, and may be an integral structure with a portion of the housing 111 or an integral structure with the entire housing 111. In other words, the housing 111 and the connecting post 112 are an integral structure, and the housing 111 itself may be an integral structure or a split structure connected as a whole by fasteners or the like.

[0084] As shown in Figure 14, in some optional embodiments, the tower transition section 10 provided by an embodiment of the present application, along the circumferential direction Y of the shell 111, the shell 111 includes a plurality of force transmission units 1111 distributed in sequence, each force transmission unit 1111 is connected to one of the connecting columns 112 to form a flow guide body, from the side where the first flange 12 is located to the side where the second flange 13 is located, the width of the flow guide body in the circumferential direction Y tends to decrease, and the flow guide body is funnel-shaped.

[0085] The decreasing trend can be understood as a gradual decrease or a step-by-step decrease. Alternatively, the width of the flow guide body can be reduced to a certain width in the circumferential direction Y from the side where the first flange 12 is located to the side where the second flange 13 is located, and then the width of the flow guide body can be maintained unchanged for the remaining portion. For example, as shown in FIG3 , the width of the flow guide body in the circumferential direction Y gradually decreases to a certain width from the side where the first flange 111 is located to the side where the second flange 12 is located, and then remains unchanged at this width.

[0086] The number of the force transmission units 1111 may be equal to the number of the connecting columns 112 and be arranged one to one.

[0087] The tower transition section 10 provided in one embodiment of the present application, through the above-mentioned setting, enables the tower transition section 10 to gradually close and divert to each connecting column 112 according to the transmission direction of the applied force load, thereby ensuring the transmission effect of the applied force load and the smoothness of the force flow transmission.

[0088] In some optional embodiments, the tower transition section 10 provided in one embodiment of the present application may be entirely cast, made of cast iron, cast steel, or other materials. This facilitates an integrated structure between the housing 111 and the connecting columns 112. To reduce stress concentration at the transition from the housing 111 to the connecting columns 112 and ease casting difficulty, the connecting columns 112 and housing 111 may be fused together, without a distinct transition zone.

[0089] The tower 100 provided in one embodiment of the present application includes the tower adapter section 10 provided in the above-mentioned embodiments. The second flange 13 provided on each connecting column 112 can be used to connect with the column 21 of the truss body 20, thereby realizing the connection requirement between the yaw system and the truss body 20. At the same time, each connecting column 112 is arranged on the side of the shell 111 away from the docking end 111a in the axial direction X and is an integrated structure with the shell 111, which is conducive to molding, does not require welding, has high load-bearing capacity, good safety performance, and low failure risk.

[0090] Continuing to refer to FIG. 2 , in some optional embodiments, a tower 100 provided in one embodiment of the present application includes a truss body 20 , the truss body 20 including a plurality of columns 21 and connecting beams 22 connecting the columns 21 , and the columns 21 can be connected to the connecting columns 112 .

[0091] In some optional embodiments, the tower 100 may further include a tower section 30 . The tower section 30 is disposed on a side of the tower transition section 10 facing away from the truss body 20 and is connected to the first flange 12 .

[0092] In a tower 100 provided by an embodiment of the present application, by providing a tower section 30 , the tower transition section 10 can be indirectly connected to the yaw system through the tower section 30 , thereby meeting the connection requirements between the tower transition section 10 and the yaw system.

[0093] In some optional embodiments, a tower 100 provided by one embodiment of the present application, the column 21 includes a column body and a cable (not shown) arranged in the column body, the column body is connected to the second flange 13, and the cable extends into the connecting column 112 and is connected to the connecting column 112.

[0094] When the tower transition section 10 includes a cable connection portion 113 , the cable can extend into the connecting column 112 and be connected to the cable connection portion 113 , thereby ensuring the fixing and tensioning requirements of the cable.

[0095] The tower 100 provided in one embodiment of the present application, through the above arrangement, enables the columns 21 to be doubly connected to the tower transition section 10 through the column body and the cables, thereby ensuring the connection strength and facilitating the transfer of loads.

[0096] An embodiment of the present application further provides a wind turbine generator set, including the tower 100 provided by the above embodiments, which has a strong load-bearing capacity, high safety, and better power generation efficiency.

[0097] An embodiment of the present application further provides a wind farm, including a wind turbine generator set provided with the transition section as described above.

[0098] Those skilled in the art should understand that the above embodiments are exemplary rather than restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on a study of the drawings, specifications and claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other devices or steps; when an item is not modified by a quantifier, it is intended to include one / kind or more / kinds of items and can be used interchangeably with "one / kind or more / kinds of items"; the terms "first" and "second" are used to identify names rather than to indicate any specific order. Any figure marks in the claims should not be understood as limiting the scope of protection. The functions of multiple parts appearing in the claims can be implemented by a separate hardware or software module. The fact that certain technical features appear in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A tower transfer section, comprising: The base portion includes a shell and a plurality of connecting posts connected to the shell, wherein the shell is in a closed ring shape and has a butt end on one axial side of the shell. The plurality of connecting posts are spaced apart in the circumferential direction of the shell, and each connecting post protrudes from the shell on a side in the axial direction away from the butt end. a first flange, disposed at the butt end; A second flange, each of the connecting columns is connected to the second flange on one side of the connecting column facing away from the butt end in the axial direction; Wherein, along the axial direction and from the first flange to the second flange side, the wall thickness of the housing in its own radial direction tends to gradually increase.

2. The tower transition section according to claim 1, wherein: Along the circumference of the shell, the shell has an intermediate area between every two adjacent connecting pillars, and the wall thickness of the shell in its own radial direction tends to gradually increase from the intermediate area to the side where the adjacent connecting pillars are located.

3. The tower transition section according to claim 1, wherein: The shell is provided with an elliptical matching groove, which is formed by a depression on one side of the shell away from the docking end in the axial direction. The connecting column extends into the matching groove and is connected to the shell.

4. The tower transition section according to claim 1, wherein: From the side where the first flange is located to the side where the second flange is located, the thickness of the connecting column in the radial direction of the shell gradually increases, and the outer periphery of the end of the connecting column connected to the second flange is circular.

5. The tower transition section according to claim 1, wherein: The connecting column has a hollow cavity therein. Along the radial direction of the shell, the connecting column partially protrudes from the outer wall surface of the shell and forms an avoidance opening. The avoidance opening is connected to the hollow cavity. A cable connection portion is provided in the connecting column, and the cable connection portion is exposed in the avoidance opening.

6. The tower transition section according to claim 5, wherein: The cable connecting portion is plate-shaped and is provided at one end of the connecting column away from the first flange. A through hole is provided on the cable connecting portion and passes through along the axial direction. The through hole is communicated with the hollow cavity.

7. The tower transition section according to claim 5, wherein: The avoidance opening is elliptical in shape, and the long axis direction of the avoidance opening is from the side where the second flange connected to the connecting column is located to the side where the first flange is located. The outer periphery of the avoidance opening is surrounded by reinforcing ribs, and the reinforcing ribs are connected to the connecting column and the shell.

8. The tower transition section according to any one of claims 1 to 7, wherein: The shell is provided with a concave cavity. In the circumferential direction, the concave cavity is provided between two adjacent connecting columns. The concave cavity is recessed from the side of the shell away from the butt end in the axial direction toward the side where the butt end is located.

9. The tower transition section according to any one of claims 1 to 7, wherein: A connection interface is provided on each of the connection columns, and a reinforcement member is connected between the connection interfaces of two adjacent connection columns. The reinforcement member includes at least one of a connection rod and a reinforcement rib plate.

10. The tower transition section according to any one of claims 1 to 7, wherein: The shell and each of the connecting columns are an integrated structure.

11. The tower transition section according to claim 10, wherein: Along the circumference of the shell, the shell includes a plurality of force transmission units distributed in sequence, each of the force transmission units is connected to one of the connecting columns to form a flow guide body, and the width of the flow guide body in the circumferential direction tends to decrease from the side where the first flange is located to the side where the second flange is located, and the flow guide body is in the shape of a funnel.

12. A tower, wherein: include: A truss body, comprising a plurality of columns and connecting beams connecting the columns; The tower transition section according to any one of claims 1 to 11, wherein each of the connecting columns is connected to one of the columns via the second flange.

13. The tower according to claim 12, wherein: The column includes a column body and a cable arranged in the column body. The column body is connected to the second flange. The cable extends into the connecting column and is connected to the connecting column.

14. A wind turbine generator set, wherein: Comprising a tower as claimed in claim 12 or 13.

15. A wind farm, wherein: The wind farm includes the wind turbine generator set according to claim 14.

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