Tower structure and wind generating set

Abstract

The utility model provides a tower structure and a wind generating set, the tower structure comprises a first tower section, a second tower section and a connecting assembly, a bottom flange of the first tower section is provided with a first special-shaped groove, and the size of the first special-shaped groove along the cross section of the first tower section is gradually increased from a first groove opening to a first groove bottom; the second tower section is arranged below the first tower section in a stacked mode, a top flange of the second tower section is provided with a second special-shaped groove, the size of the second special-shaped groove is gradually increased from a second groove opening to a second groove bottom along the cross section of the second tower section, and at least parts of the first groove opening and the second groove opening are oppositely arranged. The first special-shaped groove is communicated with the second special-shaped groove; the connecting assembly is arranged in the containing space formed by the first special-shaped groove and the second special-shaped groove so that the first tower section and the second tower section can be connected together, the bearing capacity of the tower structure is improved, and therefore the bearing capacity of the wind generating set is improved.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of wind power generation, and in particular relates to a tower structure and a wind turbine generator set. Background Art

[0002] Wind power generation has attracted widespread attention as a green energy source. Traditional wind turbines typically consist of a tower, an impeller mounted atop the tower, and a generator. The impeller and the generator's rotor are connected by a main shaft, so that the rotation of the impeller drives the generator to generate electricity.

[0003] A tower is usually formed by stacking and connecting multiple tower sections. Currently, flange bolts are usually used to connect the flanges of adjacent tower sections. That is, a circle of bolt holes is opened on the flange surface along the circumference of the tower section, and then bolts, nuts and other components are used to tighten the flanges to achieve the connection between the two flanges.

[0004] However, as the diameter of the tower continues to increase and the pressure to reduce structural costs continues to increase, the above-mentioned method of connecting the tower flange with bolts cannot meet the strength requirements. Utility Model Content

[0005] The main purpose of the present disclosure is to provide a tower structure and a wind turbine generator set to improve the structural strength of the tower structure formed by adjacent towers, thereby improving the load-bearing capacity of the tower.

[0006] To achieve the above objectives, the present disclosure provides the following technical solutions:

[0007] An exemplary embodiment of the present disclosure provides a tower structure, which includes a first tower section, a second tower section, and a connecting assembly, wherein a bottom flange of the first tower section is provided with a first special-shaped groove, and the size of the first special-shaped groove gradually increases from the first groove opening to the bottom of the first groove along the cross-section of the first tower section; the second tower section is stacked and arranged below the first tower section, and a top flange of the second tower section is provided with a second special-shaped groove, and the size of the second special-shaped groove gradually increases from the second groove opening to the bottom of the second groove along the cross-section of the second tower section, the first groove and the second groove are at least partially arranged opposite to each other, so that the first special-shaped groove and the second special-shaped groove are connected; the connecting assembly is arranged in the accommodating space formed by the first special-shaped groove and the second special-shaped groove to connect the first tower section and the second tower section together.

[0008] An exemplary embodiment of the present disclosure is that the connecting assembly includes a first connecting unit and a second connecting unit, the first connecting unit having a first fitting surface, the first fitting surface being inclined relative to the longitudinal axis of the tower structure, the second connecting unit having a second fitting surface matching the first fitting surface, the first fitting surface being configured as follows: when the first connecting unit is extruded upward, the first connecting unit extrudes the second connecting unit upward through the first fitting surface and the connecting assembly fits with the cavity wall of the accommodating space formed by the first special-shaped groove and the second special-shaped groove.

[0009] Optionally, the connection assembly also includes a third connection unit, the first connection unit has a third fitting surface, the third fitting surface and the first fitting surface are arranged opposite to each other along the circumference of the tower structure, the distance between the first fitting surface and the third fitting surface gradually increases from top to bottom, and the third connection unit is provided with a fourth fitting surface matching the third fitting surface. When the first connection unit is extruded upward, the first connection unit extrude the third connection unit upward through the third fitting surface and the connection assembly fits with the cavity wall of the accommodating space formed by the first special-shaped groove and the second special-shaped groove.

[0010] Specifically, the angle α between the first affixed surface and the longitudinal axis of the tower structure satisfies 0°<α≤45°; the angle β between the third affixed surface and the longitudinal axis of the tower structure satisfies 0°<β≤45°.

[0011] Furthermore, at least one of the second connection unit and the third connection unit includes a V-shaped notch, and the V-shaped notch is arranged on the outer side of the connection assembly along the circumference of the tower structure.

[0012] In another exemplary embodiment of the present disclosure, the apex of the V-shaped notch is located on the plane where the end surface of the bottom flange of the first tower section is located, and the V-shaped notch is symmetrically arranged relative to the plane where the end surface of the bottom flange of the first tower section is located.

[0013] Optionally, the connecting assembly further includes a fastener, the bottom flange of the first tower section is provided with a first mounting hole matching the fastener, the first connecting unit is provided with a second mounting hole matching the fastener, and the fastener is simultaneously passed through the first mounting hole and the second mounting hole to connect the first connecting unit to the first tower section.

[0014] Specifically, a countersunk hole is provided at the bottom end of the first connecting unit, and the bottom end of the fastener is embedded in the countersunk hole. An operating hole is provided on the top flange of the second tower section, and the operating hole and the countersunk hole are arranged opposite to each other.

[0015] Furthermore, the connection assembly also includes a fastener, which is provided with an external thread. The top flange of the second tower section is provided with a threaded hole matching the fastener. The fastener is passed through the threaded hole and the top end of the fastener abuts against the first connection unit.

[0016] In another aspect of the present disclosure, a wind turbine generator set is provided, wherein the wind turbine generator set comprises the tower structure as described above.

[0017] The tower structure and wind turbine generator set provided by the present disclosure have at least the following beneficial effects: the tower structure provided by the present disclosure, through a connecting component arranged in the accommodating space formed by the first special-shaped groove and the second special-shaped groove, can connect the first tower section and the second tower section together. Compared with the flange bolt connection in the existing technology, the connecting component in the present disclosure has better bearing capacity, thereby improving the bearing capacity of the tower structure, and also improving the bearing capacity of the wind turbine generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or other objects and advantages of the present disclosure will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 A structural diagram of a tower structure provided by an exemplary embodiment of the present disclosure.

[0020] Figure 2 for Figure 1 Structural diagram of the accommodating space formed by the first special-shaped groove and the second special-shaped groove.

[0021] Figure 3 for Figure 1 Exploded diagram of connected components in .

[0022] Figure 4 for Figure 3 Structural diagram of the first connection unit in .

[0023] Figure 5 for Figure 3 Structural diagram of the second connection unit in .

[0024] Description of reference numerals:

[0025] 1. First tower section; 2. Second tower section;

[0026] 3. First connecting unit; 4. Second connecting unit;

[0027] 5. Third connecting unit; 6. Fastener;

[0028] 7. First mounting hole; 8. Operation hole;

[0029] 10. Connecting assembly; 11. Gasket;

[0030] 12. Nut; 31. First fitting surface;

[0031] 32. Third fitting surface; 33. Second mounting hole;

[0032] 34. countersunk hole; 41. second bonding surface;

[0033] 42. V-shaped notch. DETAILED DESCRIPTION

[0034] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be understood that the embodiments of the present disclosure are limited to the embodiments described herein. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0035] The wind turbine generator set includes a tower, which includes a plurality of tower sections stacked one above the other, and adjacent tower sections are connected together via a connecting assembly 10 .

[0036] For the convenience of description, this embodiment takes the tower structure and two adjacent tower sections as an example for explanation. Figure 1 The tower structure includes a first tower section 1, a second tower section 2, and a connecting assembly 10. The bottom flange of the first tower section 1 is provided with a first special-shaped groove, the dimension of which gradually increases from the first groove opening to the bottom of the first groove along the cross-section of the first tower section 1. The second tower section 2 is stacked and arranged below the first tower section 1. The top flange of the second tower section 2 is provided with a second special-shaped groove, the dimension of which gradually increases from the second groove opening to the bottom of the second groove along the cross-section of the second tower section 2. The first and second grooves are at least partially arranged opposite each other, so that the first and second special-shaped grooves are connected. The connecting assembly 10 is disposed in the accommodation space formed by the first and second special-shaped grooves to connect the first and second tower sections 1 and 2.

[0037] The tower structure provided by the present disclosure is capable of connecting the first tower section 1 and the second tower section 2 together by setting the connecting component 10 in the accommodating space formed by the first special-shaped groove and the second special-shaped groove. Compared with the flange bolt connection in the prior art, the connecting component 10 in the present disclosure has better bearing capacity, thereby improving the bearing capacity of the tower structure, and also improving the bearing capacity of the wind turbine generator set.

[0038] In this embodiment, the cross section of the first tower section 1 is perpendicular to the longitudinal axis of the tower structure, and the cross section of the second tower section 2 is perpendicular to the longitudinal axis of the tower structure.

[0039] It should be noted that, referring to Figure 1The first notch of the first special-shaped groove is located on the bottom flange end surface of the first tower segment 1, and the first bottom of the first special-shaped groove is located above the first notch. The second notch of the second special-shaped groove is located on the top flange end surface of the second tower segment 2, and the second bottom of the second special-shaped groove is located below the second notch, but the present invention is not limited thereto.

[0040] In this embodiment, the upper portion of the connecting component 10 is arranged in the first special-shaped groove, and the size of the first special-shaped groove along the circumferential cross-section of the first tower segment 1 gradually increases from the first groove opening to the bottom of the first groove, so that the connecting component 10 can be clamped in the first special-shaped groove without detaching through the first groove opening. Similarly, the lower portion of the connecting component 10 can be clamped in the second special-shaped groove without detaching through the second groove opening. In this way, the connecting component 10 is simultaneously clamped in the first special-shaped groove and the second special-shaped groove, so that the connecting component 10 connects the first tower segment 1 and the second tower segment 2 together.

[0041] The connection assembly 10 provided by the present disclosure has a larger effective connection cross-section than the flange bolt, so that the connection assembly 10 has a greater bearing capacity, thereby improving the bearing capacity of the tower structure.

[0042] In this embodiment, the size of the first special-shaped groove along the circumferential cross-section of the first tower segment 1 gradually increases from the first groove opening to the bottom of the first groove, and the size of the second special-shaped groove along the circumferential cross-section of the second tower segment 2 gradually increases from the second groove opening to the bottom of the second groove. When the first special-shaped groove and the second special-shaped groove are connected, the accommodating space formed by the first special-shaped groove and the second special-shaped groove is smaller in size at the first groove opening and the second groove. For example, but not limited to, the accommodating space formed by the first special-shaped groove and the second special-shaped groove has a longitudinal cross-section that is roughly gourd-shaped, "8"-shaped, or formed as two trapezoids connected up and down.

[0043] The longitudinal cross section disclosed in this embodiment is parallel to the longitudinal axis of the tower structure, and the longitudinal cross section is perpendicular to the radius of the circular surface where the flange of the tower structure is located.

[0044] Reference Figure 2 In this embodiment, the longitudinal cross-section of the accommodation space formed by the first special-shaped groove and the second special-shaped groove is two trapezoidal shapes connected vertically, but the present invention is not limited thereto. As an example, the first special-shaped groove and the second special-shaped groove are dovetail grooves, but the present invention is not limited thereto.

[0045] Reference Figure 1 and Figure 3The connecting assembly 10 includes a first connecting unit 3 and a second connecting unit 4. The first connecting unit 3 has a first fitting surface 31, which is inclined relative to the longitudinal axis of the tower structure. The second connecting unit 4 has a second fitting surface 41 that matches the first fitting surface 31. The first fitting surface 31 is configured as follows: when the first connecting unit 3 is squeezed upward, the first connecting unit 3 squeezes the second connecting unit 4 upward through the first fitting surface 31 and the connecting assembly 10 fits with the cavity wall of the accommodating space formed by the first special-shaped groove and the second special-shaped groove.

[0046] In this embodiment, the first connecting unit 3 has the inclined first fitting surface 31 , so when the first connecting unit 3 is pressed upward, the first fitting surface 31 can press the second connecting unit 4 upward.

[0047] Specifically, continue to refer to Figure 3 In this embodiment, the second connecting unit 4 is disposed on the left side of the first connecting unit 3 along the circumferential direction of the tower structure. The first abutment surface 31 is located on the left side of the first connecting unit 3 and extends obliquely from top to bottom toward the lower left. When the first connecting unit 3 is subjected to an upward thrust or tension, the first abutment surface 31 can provide an oblique upward thrust to the second connecting unit 4 and press it against it. Under the push of the first connecting unit 3, the side of the second connecting unit 4 facing away from the second abutment surface 41 presses against the wall of the accommodation space formed by the first and second special-shaped grooves, thereby ensuring that the connection assembly 10 firmly connects the first tower segment 1 and the second tower segment 2.

[0048] Continue to refer to Figure 3 The connection assembly 10 further includes a third connection unit 5. For example, but not limited to, the third connection unit 5 can be arranged on the right side of the first connection unit 3 along the circumference of the tower structure. Specifically, the first connection unit 3 has a third fitting surface 32. The third fitting surface 32 and the first fitting surface 31 are arranged relative to each other along the circumference of the tower structure. For example, but not limited to, the third fitting surface 32 is located on the right side of the first connection unit 3, and the third fitting surface 32 extends from top to bottom and tilted to the lower right, so that the distance between the first fitting surface 31 and the third fitting surface 32 gradually increases from top to bottom. Corresponding to the first connection unit 3, the third connection unit 5 is provided with a fourth fitting surface that matches the third fitting surface 32. When the first connection unit 3 is pressed upward, the third connection unit 5 is squeezed tightly and the connection assembly 10 fits the cavity wall of the accommodation space formed by the first special-shaped groove and the second special-shaped groove.

[0049] In the embodiment, the first connecting unit 3 is provided with the second connecting unit 4 and the third connecting unit 5 on the left and right sides along the circumferential direction of the tower structure, and the first connecting unit 3 is provided with the first fitting surface 31 and the third fitting surface 32 arranged obliquely, and the first fitting surface 31 and the third fitting surface 32 are arranged to be spaced apart along the circumferential direction of the tower structure and extend away from each other from top to bottom. When the first connecting unit 3 is pressed upward, the second connecting unit 4 and the third connecting unit 5 are pressed upward by the first fitting surface 31 and the third fitting surface 32 respectively, so that the first connecting unit 3, the second connecting unit 4 and the third connecting unit 5 are pressed tightly and fit with the cavity wall of the accommodating space formed by the first special-shaped groove and the second special-shaped groove, and the connecting assembly 10 formed by the first connecting unit 3, the second connecting unit 4 and the third connecting unit 5 can form a stable and reliable connection with the first tower section 1 and the second tower section 2.

[0050] With reference to Figure 3 In the embodiment, at least one of the second connecting unit 4 and the third connecting unit 5 can be provided with a V-shaped notch 42, which is arranged on the outer side of the connecting assembly 10 along the circumferential direction of the tower structure, so as to fit with the cavity wall of the accommodating space formed by the first special-shaped groove and the second special-shaped groove, but not limited thereto.

[0051] In the embodiment, the connecting assembly 10 fits with the cavity wall of the accommodating space formed by the first special-shaped groove and the second special-shaped groove through the V-shaped notch 42, so that the connecting assembly 10 connects the first tower section 1 and the second tower section 2 together.

[0052] The embodiment takes an example that the left and right sides of the connecting assembly 10 along the circumferential direction of the tower structure are respectively provided with one V-shaped notch 42, but not limited thereto. The number of V-shaped notches 42 on the left and right sides of the connecting assembly 10 can be selected according to actual needs, so as to increase the contact area between the connecting assembly 10 and the first tower section 1 and between the connecting assembly 10 and the second tower section 2, thereby improving the carrying capacity of the tower structure.

[0053] As an example, the embodiment takes an example that the second connecting unit 4 and the third connecting unit 5 are respectively provided with V-shaped notches 42, at this time, the second connecting unit 4 and the third connecting unit 5 have substantially the same structure. For the convenience of description, the structure of the second connecting unit 4 is taken as an example for description.

[0054] With reference to Figure 3 and Figure 5 The side of the second connecting unit 4 away from the second fitting surface 41 is provided with a V-shaped notch 42, and the vertex of the V-shaped notch 42 is located at the middle of the second connecting unit 4 along the longitudinal axis direction of the tower structure, for example but not limited to, the vertex of the V-shaped notch 42 is located substantially on the plane where the bottom flange of the first tower section 1 is located, but not limited thereto.

[0055] As an example, the apex of the V-shaped notch 42 is located on the plane where the end face of the bottom flange of the first tower section 1 is located, and the V-shaped notch 42 is symmetrically arranged relative to the plane where the end face of the bottom flange of the first tower section 1 is located, so that the second connecting unit 4 is subjected to force as evenly as possible in the longitudinal axis direction of the tower structure, but this is not limited to this.

[0056] Continue to refer to Figure 3 As an example, the angle α between the first contact surface 31 and the longitudinal axis of the tower structure satisfies 0°<α≤45°. With this configuration, when the first connecting unit 3 has a first upward stroke, it can drive the second connecting unit 4 to have a relatively significant second stroke along the circumference of the tower structure, so that the connecting assembly 10 can contact the cavity wall of the accommodation space formed by the first and second special-shaped grooves. If α is within the range of 45°<α≤90°, when the first connecting unit 3 has a first upward stroke, the third stroke of the second connecting unit 4 along the circumference of the tower structure is significantly smaller than the aforementioned second stroke. In this case, the second connecting unit 4 cannot effectively contact the cavity wall of the accommodation space formed by the first and second special-shaped grooves. In this case, the first tower section 1 can move relative to the second tower section 2, and the connection of the tower structure is unstable.

[0057] Similarly, the angle β between the third fitting surface 32 and the longitudinal axis of the tower structure satisfies 0°<β≤45°. For the specific reasons, please refer to the first fitting surface 31 and will not be elaborated here.

[0058] As an example, the angle α between the first fitting surface 31 and the longitudinal axis of the tower structure can be equal to the angle β between the third fitting surface 32 and the longitudinal axis of the tower structure, so that the projection of the first connecting unit 3 on the longitudinal section is an isosceles trapezoid, but not limited to this.

[0059] The longitudinal cross-section disclosed in this embodiment is parallel to the longitudinal axis of the tower structure and perpendicular to the radius of the circular surface on which the flange of the tower structure is located. It is understood that in this embodiment, the circular surface on which the flange of the tower structure is located can be coplanar with the end surface on which the bottom flange of the first tower section 1 is located. Since the bottom flange of the first tower section 1 and the top flange of the second tower section 2 are in contact at the end surfaces, the circular surface on which the flange of the tower structure is located can also be coplanar with the end surface on which the top flange of the second tower section 2 is located.

[0060] Reference Figures 1 to 4 In this embodiment, in order to facilitate the upward extrusion force provided to the first connecting unit 3, the connecting assembly 10 further includes a fastener 6 (such as Figure 3 As shown), the bottom flange of the first tower section 1 is provided with a first mounting hole 7 (as shown) that matches the fastener 6. Figure 2 As shown), the first connecting unit 3 is provided with a second mounting hole 33 (as shown in FIG. Figure 4 As shown in FIG, when the fastener 6 is simultaneously inserted into the first mounting hole 7 and the second mounting hole 33, the fastener 6 limits the connection component 10 to the accommodation space formed by the first special-shaped groove and the second special-shaped groove, thereby preventing the connection component 10 from moving radially along the tower structure and improving the connection reliability of the tower structure.

[0061] The assembly diagram of the tower structure of this embodiment is as follows: Figure 1 As shown, the fastener 6 can have external threads and can be inserted from bottom to top into the second mounting hole 33 before exiting through the first mounting hole 7. A nut 12 can be provided on the top surface of the bottom flange of the first tower section 1. The nut 12 can be threadedly engaged with the top of the fastener 6, thereby constraining the connection assembly 10 between the first tower section 1 and the second tower section 2 via the fastener 6, thereby firmly connecting the first tower section 1 and the second tower section 2 together. In this embodiment, the first mounting hole 7 can be a plain hole, but is not limited to this, and can also be configured as a threaded hole as needed. As an example, the second mounting hole 33 can be a plain hole, but is not limited to this, and can also be configured as a threaded hole as needed.

[0062] In this embodiment, since the fastener 6 is passed through the second mounting hole 33 and connects the first connecting unit 3 to the first tower section 1, by tightening the fastener 6, the first connecting unit 3 can be pulled upward to move the first connecting unit 3 upward, and the first fitting surface 31 and the third fitting surface 32 respectively squeeze the second connecting unit 4 and the third connecting unit 5 upward, so that the connecting component 10 fits with the cavity wall of the accommodating space formed by the first special-shaped groove and the second special-shaped groove, thereby firmly connecting the first tower section 1 and the second tower section 2 together.

[0063] Continue to refer to Figure 4 The bottom end of the first connecting unit 3 is provided with a countersunk hole 34, into which the bottom end of the fastener 6 is embedded. For example, the bottom end of the fastener 6 is configured to be non-circular, and the countersunk hole 34 matches the bottom end of the fastener 6. When the bottom end of the fastener 6 is embedded in the countersunk hole 34, the fastener 6 cannot rotate about its own axis. Therefore, when the nut 12 that matches the fastener 6 is tightened, the fastener 6 cannot rotate with the nut 12. In this configuration, the countersunk hole 34 in this embodiment is used to accommodate the bottom end of the fastener 6 and to limit the position of the fastener 6, preventing the fastener 6 from rotating relative to the first tower section 1.

[0064] As an example, in order to further improve the connection reliability of the fastener 6, a gasket 11 is also provided at the bottom end of the fastener 6. The bottom end of the fastener 6 presses the gasket 11 into the countersunk hole 34 to increase the friction between the fastener 6 and the countersunk hole 34, thereby improving the connection reliability of the fastener 6.

[0065] Further, return Figure 2In order to facilitate the assembly of the fastener 6, the top flange of the second tower section 2 is provided with an operating hole 8, and the countersunk hole 34 and the operating hole 8 are arranged opposite to each other. The bottom end of the fastener 6 can pass through the operating hole 8 and enter the countersunk hole 34.

[0066] As an example, the diameter of the operating hole 8 is larger than the diameter of the counterbore 34, so that the bottom end of the fastener 6 can smoothly pass through the operating hole 8, but this is not limited to this. In this embodiment, the operating hole 8 can be set as a circular hole for illustration, but this is not limited to this. If needed, the operating hole 8 can also be a waist-shaped hole or a polygonal hole.

[0067] In this embodiment, the first connecting unit 3 is connected only to the first tower section 1 through the fastener 6 to achieve radial limitation of the first connecting unit 3 along the tower structure. During the operation of the wind turbine generator set, the fastener 6 does not bear the shear force between the first tower section 1 and the second tower section 2, thereby improving the service life of the fastener 6 and the reliability of the connection assembly 10.

[0068] The above embodiment is described using the example of fastener 6 being connected only between first tower segment 1 and first connecting unit 3. Alternatively, fastener 6 may be connected only between second tower segment 2 and first connecting unit 3. Specifically, connecting assembly 10 further includes fastener 6 having an external thread. A threaded hole (not shown) matching fastener 6 is provided on the top flange of second tower segment 2. Fastener 6 is inserted into the threaded hole, and the top end of fastener 6 abuts against first connecting unit 3.

[0069] When the fastener 6 is screwed so that the top end of the fastener 6 enters the accommodating space formed by the first special-shaped groove and the second special-shaped groove, the top end of the fastener 6 can be pressed against the first connecting unit 3. For example, but not limited to, the top end of the fastener 6 can be pressed against the bottom end of the first connecting unit 3 to be able to squeeze the first connecting unit 3 upward. At this time, the first connecting unit 3 can squeeze the second connecting unit 4 and the third connecting unit 5 located on both sides of the first connecting unit 3, so that the connecting assembly 10 is pressed against the cavity wall of the accommodating space formed by the first special-shaped groove and the second special-shaped groove, so that the first tower section 1 and the second tower section 2 are firmly connected together.

[0070] In this embodiment, the fastener 6 is rotatably connected to the threaded hole of the top flange of the second tower section 2, and the length of the top end of the fastener 6 extending into the accommodating space formed by the first special-shaped groove and the second special-shaped groove can be adjusted, so that the first connecting unit 3 can be squeezed upward.

[0071] The connection assembly 10 provided by the present disclosure has a larger cross-sectional area than the flange bolts in the prior art. The tensile strength of the connection assembly 10 can be improved by increasing its lateral width, thereby avoiding the problem of being limited by the bolt diameter when using traditional flange bolts.

[0072] At the same time, without increasing the tower diameter, when the load is large and the L-type flange fails the calculation, the L-type flange can be changed to a T-flange for further calculation. The outer ring of the T-flange does not need to be bolted, thus avoiding the work of bolt operation and maintenance on the outside of the tower.

[0073] The tower structure provided by the present invention is assembled as follows: after the two flange surfaces of the first tower section 1 and the second tower section 2 are connected, the first connecting unit 3, the second connecting unit 4 and the third connecting unit 5 are respectively inserted into the accommodating space formed by the first special-shaped groove and the second special-shaped groove along the radial direction of the tower structure; then the fastener 6 is inserted from bottom to top through the operating hole 8 into the second mounting hole 33 and the first mounting hole 7 in sequence, and then the nut 12 is sleeved on the top of the fastener 6, and the installation is completed.

[0074] The nut 12 is tightened by a torque wrench. During the tightening process of the nut 12, the first connecting unit 3 is pulled upward by the fastener 6; during the upward movement of the first connecting unit 3, the second connecting unit 4 and the third connecting unit 5 are respectively moved away from each other along the circumference of the tower structure through the first fitting surface 31 and the third fitting surface 32; during the process of the second connecting unit 4 and the third connecting unit 5 moving away from each other, the V-shaped notch 42 can be clamped in the first special-shaped groove and the second special-shaped groove, thereby firmly connecting the first tower section 1 and the second tower section 2 together.

[0075] After the tower structure provided by the present disclosure is installed, when a lateral load is encountered so that the bottom flange of the first tower section 1 and the top flange of the second tower section 2 tend to separate, the bottom flange of the first tower section 1 will drive the fastener 6 to continue to move upward, thereby repeating the above process, realizing the self-tightening effect of the tower structure.

[0076] In another aspect of the present disclosure, a wind turbine generator set is provided, which includes the tower structure as described above.

[0077] In the description of the present disclosure, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0078] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this disclosure, unless otherwise specified, "plurality" means two or more.

[0079] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, electrical connections, or communication connections; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal communication between two components or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0080] The features, structures or characteristics described in the present disclosure may be combined in any suitable manner in one or more embodiments. In the above description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

Claims

1. A tower structure, characterized in that: The tower structure comprises: A first tower section (1), wherein the bottom flange of the first tower section (1) is provided with a first special-shaped groove, and the size of the first special-shaped groove along the cross section of the first tower section (1) gradually increases from the first groove opening to the first groove bottom; A second tower section (2) is stacked and arranged below the first tower section (1); a top flange of the second tower section (2) is provided with a second special-shaped groove; the size of the second special-shaped groove gradually increases from the second groove opening to the second groove bottom along the cross section of the second tower section (2); the first groove opening and the second groove opening are at least partially arranged opposite to each other, so that the first special-shaped groove and the second special-shaped groove are connected; A connecting assembly (10) is arranged in the accommodation space formed by the first special-shaped groove and the second special-shaped groove to connect the first tower section (1) and the second tower section (2) together.

2. The tower structure according to claim 1, characterized in that: The connecting assembly (10) comprises a first connecting unit (3) and a second connecting unit (4), wherein the first connecting unit (3) has a first fitting surface (31), the first fitting surface (31) being arranged obliquely relative to the longitudinal axis of the tower structure, and the second connecting unit (4) having a second fitting surface (41) matching the first fitting surface (31), wherein the first fitting surface (31) is configured such that when the first connecting unit (3) is pressed upward, the first connecting unit (3) presses the second connecting unit (4) upward through the first fitting surface (31), and the connecting assembly (10) fits against the cavity wall of the accommodating space formed by the first special-shaped groove and the second special-shaped groove.

3. The tower structure according to claim 2, characterized in that: The connection assembly (10) further comprises a third connection unit (5), the first connection unit (3) having a third fitting surface (32), the third fitting surface (32) and the first fitting surface (31) being arranged relative to each other along the circumference of the tower structure, the distance between the first fitting surface (31) and the third fitting surface (32) gradually increasing from top to bottom, the third connection unit (5) being provided with a fourth fitting surface matching the third fitting surface (32), and when the first connection unit (3) is pressed upward, the first connection unit (3) presses the third connection unit (5) upward through the third fitting surface (32), and the connection assembly (10) is fitted with the cavity wall of the accommodation space formed by the first special-shaped groove and the second special-shaped groove.

4. The tower structure according to claim 3, characterized in that: The included angle α between the first fitting surface (31) and the longitudinal axis of the tower structure satisfies 0°<α≤45°; the included angle β between the third fitting surface (32) and the longitudinal axis of the tower structure satisfies 0°<β≤45°.

5. The tower structure according to claim 3, characterized in that: At least one of the second connection unit (4) and the third connection unit (5) comprises a V-shaped notch (42), and the V-shaped notch (42) is arranged on the outer side of the connection assembly (10) along the circumference of the tower structure.

6. The tower structure according to claim 5, characterized in that: The apex of the V-shaped notch (42) is located on the plane where the bottom flange end face of the first tower section (1) is located, and the V-shaped notch (42) is symmetrically arranged relative to the plane where the bottom flange end face of the first tower section (1) is located.

7. The tower structure according to any one of claims 2 to 6, characterized in that: The connection assembly (10) further comprises a fastener (6); the bottom flange of the first tower section (1) is provided with a first mounting hole (7) matching the fastener (6); the first connection unit (3) is provided with a second mounting hole (33) matching the fastener (6); the fastener (6) is simultaneously passed through the first mounting hole (7) and the second mounting hole (33) to connect the first connection unit (3) to the first tower section (1).

8. The tower structure according to claim 7, characterized in that: The bottom end of the first connecting unit (3) is provided with a countersunk hole (34), the bottom end of the fastener (6) is embedded in the countersunk hole (34), and the top flange of the second tower section (2) is provided with an operating hole (8), and the operating hole (8) and the countersunk hole (34) are arranged relative to each other.

9. The tower structure according to any one of claims 2 to 6, characterized in that: The connection assembly (10) further comprises a fastener (6), wherein the fastener (6) is provided with an external thread, and the top flange of the second tower section (2) is provided with a threaded hole matching the fastener (6), the fastener (6) is passed through the threaded hole, and the top end of the fastener (6) abuts against the first connection unit (3).

10. A wind turbine generator set, characterized in that: The wind turbine generator set comprises the tower structure according to any one of claims 1 to 9.

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