Spoiler, wind turbine tower and wind turbine generator including the same

Abstract

The present invention discloses a spoiler, a wind turbine tower and a wind turbine generator including the same. The spoiler of the present invention comprises a spoiler portion and a connecting portion, wherein the spoiler portion comprises a flow-breaking end and a plurality of side surfaces, wherein the flow-breaking end and the plurality of side surfaces are connected to form a polyhedron, wherein the flow-breaking end is located at the front end of the spoiler, and the connecting portion is an annular connecting portion, and a spoiler portion is arranged outside the annular connecting portion. The spoiler of the present invention, the wind turbine tower and the wind turbine generator including the same, wherein the spoiler composed of the annular connecting portion and the spoiler portion has a simple structure, low manufacturing cost, and is also convenient for installing the spoiler to a required location. The spoiler is installed before the tower of the wind turbine generator is hoisted, and has the same design life as the tower body, and can suppress the occurrence of vortex-induced vibration of the tower during the entire life cycle of the wind turbine generator set, and does not require maintenance during the entire life cycle of the wind turbine generator set, and has a low use cost.

Description

Technical Field

[0001] The present invention relates to the technical field of avoiding vortex-induced vibration, and in particular to a spoiler, a wind turbine tower and a wind turbine generator comprising the same. Background Art

[0002] Wind turbines, also called fans, are electrical equipment that converts wind energy into mechanical work, which drives the rotor to rotate and ultimately outputs alternating current. A wind turbine consists of a tower, blades, and a generator set. Most wind turbines are equipped with towers that have a circular cross-section. When wind passes through the tower surface, vortex-induced vibrations are very likely to occur, especially when the tower is being hoisted or the unit is powered off.

[0003] The vortex-induced vibration of the tower is a resonance phenomenon, which is very harmful to the tower and the entire unit. Once it occurs, it will not only cause serious fatigue damage to the tower and its connecting fasteners, threatening the life of the tower, but also may cause aerodynamic instability of the tower, resulting in serious structural damage, and even cause the collapse of the entire unit, causing serious economic losses. Therefore, it is necessary to find a way to suppress the occurrence of vortex-induced vibration of the tower.

[0004] At present, there are three methods in the industry to suppress the vortex-induced vibration of the tower and the existing problems are as follows:

[0005] 1. Use temporary spoiler strips. Temporary spoiler strips are generally made of foam plastics, which have a short life span and cannot be used for a long time. At present, they are used as a tool when the unit is hoisted. After the unit is hoisted, it must be removed for the hoisting of the next unit. A set of temporary spoiler strips can be used for the hoisting of 5 to 8 units. In addition, after the fan has been running for a period of time, if a power outage occurs, the vortex-induced vibration of the tower cannot be suppressed because the temporary spoiler strips have been removed.

[0006] 2. Use the damper method. The damper can only suppress a certain order of specific frequency. The suppression effect depends on the modal mass ratio of the damper to the wind turbine generator set, and the cost is relatively high. Therefore, the damper is more often used as a temporary tooling damper. After the unit is hoisted, it also needs to be dismantled and used for the hoisting of the next unit. Therefore, the damper cannot suppress the vortex-induced vibration of the tower during the entire life of the unit, nor can it suppress the vortex-induced vibration of the tower in the event of a power outage.

[0007] 3. Use the active yaw method. When the unit is powered on, the vortex-induced vibration can be suppressed by actively yawing the wind to destroy the flow field. However, once the unit is powered off, the unit can no longer be yawed to the wind, and the vortex-induced vibration of the tower cannot be suppressed. Summary of the invention

[0008] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art and to provide a spoiler, a wind turbine tower and a wind turbine generator comprising the same.

[0009] The present invention solves the above technical problems through the following technical solutions:

[0010] A spoiler is characterized in that it includes a spoiler portion and a connecting portion, the spoiler portion includes a flow-breaking end and multiple side surfaces, the flow-breaking end and the multiple side surfaces are connected to form a polyhedron, the flow-breaking end is located at the front end of the spoiler, the connecting portion is an annular connecting portion, and the spoiler portion is arranged outside the annular connecting portion.

[0011] Preferably, the spoiler is used to suppress vortex-induced vibration of the wind turbine tower.

[0012] In this solution, the spoiler is installed before the wind turbine tower is hoisted. It has the same design life as the tower body and can suppress the occurrence of vortex-induced vibration of the tower during the entire life cycle of the wind turbine. It does not require maintenance during the entire life cycle of the wind turbine and has low cost of use.

[0013] Preferably, the connecting portion is a connecting plate.

[0014] Preferably, the annular connecting portion includes a plurality of connecting segments, the plurality of connecting segments are detachably connected to each other, and at least one spoiler is provided on each connecting segment.

[0015] In this solution, the above structural form is adopted to facilitate the installation of the spoiler on site.

[0016] Preferably, the annular connecting portion is composed of three connecting segments, and each connecting segment is connected by a fastener.

[0017] In this solution, the above-mentioned structural form is adopted, which will not cause damage to the paint and the like on the outer surface of the body on which the spoiler is installed.

[0018] Preferably, the connecting portion and the spoiler portion are connected by welding.

[0019] In this solution, the above-mentioned structural form is adopted to improve the firmness of the connection between the spoiler and the connecting part, avoid the accidental falling off of the spoiler, increase the service life of the spoiler, and reduce the use cost.

[0020] Preferably, a plurality of side surfaces form a prism, and the flow-breaking end is a side ridge of the prism.

[0021] In this solution, the above-mentioned structural form is adopted to integrate the flow-breaking end into the side, which simplifies the structural design and reduces the manufacturing cost.

[0022] Preferably, the number of the plurality of side surfaces is 5, the 5 side surfaces form a triangular prism, and the flow-breaking end is a side ridge of the triangular prism.

[0023] In this solution, the above structural form is adopted to further simplify the structural design.

[0024] Preferably, the triangular prism is a shell with an internal hollow structure, and the thickness of the shell is 0.5mm-5mm.

[0025] In this solution, the above-mentioned structural form is adopted, which greatly reduces the weight of the spoiler, facilitates the installation of the spoiler, and reduces the manufacturing cost.

[0026] Preferably, the triangular prism is a right prism, the bottom surface of the right prism is an equilateral triangle, and the side length of the equilateral triangle is 200mm-300mm.

[0027] In this solution, the above-mentioned structural form is adopted, and there is no need to distinguish the installation surface, which reduces the difficulty of installation and facilitates the automated production of the product.

[0028] Preferably, the number of the plurality of side surfaces is 6, and the 6 side surfaces constitute a plate-shaped hexahedron, wherein the narrower and longer surface of the hexahedron is a flow-breaking end.

[0029] In this solution, the above structural form is adopted to further simplify the structural design.

[0030] A wind turbine tower comprises a tower body, and is characterized in that the tower body is provided with a plurality of spoilers as described above.

[0031] Preferably, a plurality of spoilers are arranged in layers.

[0032] In this solution, the above-mentioned structural form is adopted, which not only ensures the spoiler effect, but also avoids installing spoilers all over the tower from top to bottom, thereby reducing the installation cost.

[0033] Preferably, the angle between the flow-breaking end of the spoiler and the installation plane of the spoiler is 45°-70°.

[0034] In this solution, the above-mentioned structural form is adopted to better enable air to flow through the tower and avoid vortex-induced vibration.

[0035] Preferably, the installation plane of the spoiler is a radial plane of the wind turbine tower.

[0036] Preferably, a flange surface is provided on the top of the wind turbine tower, the distance between the flange surface and the installation plane of the layer of spoilers closest to the flange surface is 1.5m-3m, and the distance between the installation planes of two adjacent layers of spoilers is 1.2m-1.5m.

[0037] Preferably, the gap between the wind turbine tower and the spoiler is sealed with silicone.

[0038] In this solution, the above-mentioned structural form is adopted, which can prevent rainwater from accumulating in the gap between the spoiler and the tower, and can also avoid additional noise caused by the gap between the spoiler and the tower.

[0039] Preferably, the spoiler is made of stainless steel.

[0040] In this solution, the above-mentioned structural form is adopted, which has low cost and long service life, and also avoids the problem of spoiler rusting and corroding the tower.

[0041] Preferably, the flow-breaking end of the spoiler is arranged on the outside of the tower body in the form of a spiral line.

[0042] In this solution, the above-mentioned structural form is adopted to better enable air to flow through the tower and avoid vortex-induced vibration of the tower.

[0043] A wind turbine generator is characterized by comprising any one of the wind turbine generator towers described above.

[0044] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0045] The positive and progressive effects of the present invention are:

[0046] The spoiler, the wind turbine tower and the wind turbine generator including the same of the present invention, the spoiler consisting of the annular connecting part and the spoiler part has a simple structure, low manufacturing cost, and is also convenient for installing the spoiler to a required place. The spoiler is installed before the wind turbine tower is hoisted, has the same design life as the tower body, can suppress the occurrence of vortex-induced vibration of the tower during the entire life cycle of the wind turbine generator set, and does not require maintenance during the entire life cycle of the wind turbine generator set, and has low use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention.

[0048] Figure 2 Schematic diagram of the structure of the spoiler in Example 1 of the present invention

[0049] Figure 3 This is a schematic diagram of the structure of Example 2 of the present invention.

[0050] Figure 4 This is a schematic diagram of the structure of Example 3 of the present invention.

[0051] Figure 5 Schematic diagram of the structure of the spoiler in Example 4 of the present invention.

[0052] Figure 6 This is a schematic diagram of the structure of Example 5 of the present invention.

[0053] Figure 7 This is a top view of the wind turbine tower in Example 5 of the present invention.

[0054] Figure 8 Schematic diagram of the structure of the angle between the flow-breaking end and the upper surface of the connecting portion in Example 5 of the present invention.

[0055] Description of reference numerals:

[0056] Spoiler 1

[0057] Side rib 11

[0058] Side 12

[0059] Bottom 13

[0060] Narrow side 14

[0061] Connection 2

[0062] Connecting plate 21

[0063] Hem 22

[0064] Tower body 3

[0065] Tower flange surface 31

[0066] Helix 32 DETAILED DESCRIPTION

[0067] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0068] Example 1

[0069] like Figure 1 As shown, the present invention provides a spoiler, comprising a spoiler portion 1 and a connecting portion 2, wherein the spoiler portion 1 comprises a flow-breaking end and a plurality of side surfaces, wherein the flow-breaking end is directly connected to the plurality of side surfaces to form a polyhedron, and the flow-breaking end is located at the front end of the spoiler. The flow-breaking end is used to separate the fluid, and the separated fluid is diverted along the side surface, thereby changing the flow direction of the fluid and avoiding the vortex-induced vibration phenomenon. The connecting portion 2 is an annular connecting portion.

[0070] In order to achieve the purpose of reducing vortex-induced vibration, the spoiler of the present invention can be installed in place before the wind turbine tower is hoisted. The spoiler of the present invention has the same design life as the tower body, and can suppress the occurrence of vortex-induced vibration of the tower during the entire life cycle of the wind turbine. Moreover, it does not require maintenance during the entire life cycle of the wind turbine, and the cost of use is low.

[0071] like Figure 2As shown in the figure, the triangular prism is a schematic diagram of the spoiler structure of this embodiment. In this embodiment, the spoiler 1 is designed as a triangular prism. The triangular prism-shaped spoiler 1 includes three side surfaces 12 and two bottom surfaces 13, and one side rib 11 is a flow-breaking end. The side rib 11 divides the fluid into two, and the separated fluid continues to flow along the two side surfaces 12 adjacent to the flow-breaking end. Thereby changing the flow direction of the fluid and avoiding the occurrence of vortex-induced vibration.

[0072] In order to reduce the weight of the spoiler, the triangular prism of the spoiler 1 may also be designed as a shell with a hollow structure, and the thickness of the shell is preferably 0.5 mm-5 mm.

[0073] As an alternative, you can also Figure 1 The bottom surface 13 of the middle spoiler 1 is designed to be perpendicular to the side surface 12, that is, the triangular prism is designed as a right prism, and at the same time, the bottom surface 13 is designed as an equilateral triangle, and the side length of the triangle is preferably 200mm-300mm. With the above structural form, there is no need to distinguish the installation surface, which reduces the difficulty of installation and facilitates the automated production of the spoiler.

[0074] Example 2

[0075] like Figure 3 As shown, the structure of this embodiment is basically the same as that of embodiment 1, except that:

[0076] In this solution, the connection part 2 is designed as a connection plate 21. Folding edges 22 are provided at both ends of the connection plate 21, bolt holes are pre-drilled in the folding edges 22, and the folding edges 22 are connected together by bolt assemblies to form a ring shape. In this solution, damage to the paint on the outer surface of the installation body is avoided during the installation of the spoiler.

[0077] Example 3

[0078] like Figure 4 As shown, the structure of this embodiment is basically the same as that of embodiment 2, except that:

[0079] In this solution, the connection part 2 connects three connection plates 21 in sequence. The three connection plates 21 are connected head to tail to form a ring. A spoiler 1 is arranged on the outer side of each connection plate 21 .

[0080] As an alternative solution, the number of the connecting plates 21 in this solution may be increased or decreased according to actual conditions, and a plurality of spoilers 1 may be provided on the outer side of each connecting plate 21 .

[0081] As a preferred solution, the spoiler 1 and the connecting portion 2 can also be connected together by welding. This solution improves the firmness of the connection between the spoiler 1 and the connecting portion 2, avoids the accidental fall-off of the spoiler 1, increases the life of the spoiler, and reduces the use cost of the spoiler.

[0082] Example 4

[0083] like Figure 5 As shown (connection portion 2 is not shown in the figure), the structure of this embodiment is different from that of embodiment 1 in that:

[0084] In this solution, the spoiler 1 is a rectangular plate. The rectangular plate-shaped spoiler 1 includes two side surfaces 12, two bottom surfaces 13 and two narrow side surfaces 14, and the narrow side surface 14 located in the front is a flow-breaking end. The narrow side surface 14 separates the fluid, and the two side surfaces 12 respectively constitute a barrier wall for the fluid. The fluid flows separately along the side surfaces 12, which can also achieve the purpose of avoiding the occurrence of vortex-induced vibration.

[0085] Example 6

[0086] like Figure 6 and Figure 7 As shown, this embodiment is a wind turbine tower. The wind turbine tower includes a tower body 3, and a plurality of spoilers of the present invention are arranged on the periphery of the tower body 3. The spoilers are installed in place before the wind turbine tower body 3 is hoisted. When the air flows through the tower body 3, the flow-breaking end 11 of the spoiler separates the air flow, and the air flow flows upward and downward along the sides of the spoiler, respectively, to avoid vortex-induced vibration between the air flow and the tower body 3. In addition, the spoiler has the same design life as the tower body 3, and can suppress the occurrence of vortex-induced vibration of the tower body 3 during the entire life cycle of the wind turbine generator set. Moreover, it does not require maintenance during the entire life cycle of the wind turbine generator set, and has low use cost.

[0087] As a preferred solution, the spoilers can also be arranged in layers on the tower body 3, and there is no need to install spoilers on the entire tower body 3 from top to bottom, thereby reducing the installation cost.

[0088] like Figure 8 As shown, as a preferred solution, the angle α between the flow-breaking end 11 of the spoiler 1 and the upper surface of the connecting portion 2 can also be set to 45°-70°. If the spoiler does not have a connecting portion 2, the angle α between the flow-breaking end 11 of the spoiler 1 and the radial plane of the tower body 3 can be set to 45°-70°, which can also achieve the purpose of avoiding vortex-induced vibration.

[0089] As an alternative solution, the distance h1 between the flange surface 31 of the tower body 3 and the installation plane of the spoiler layer closest to the flange surface 31 may be 1.5m-3m, and the distance h2 between two adjacent installation planes of the spoiler layers may be 1.2m-1.5m.

[0090] In order to prevent rainwater from accumulating in the gap between the spoiler and the tower body 3, the gap between the tower body 3 and the spoiler can also be sealed with silicone. At the same time, the problem of additional noise due to the gap between the spoiler and the tower can also be avoided.

[0091] In order to prevent the spoiler from rusting and corroding the tower body 3, the spoiler material may also be stainless steel.

[0092] As an alternative solution, the flow-breaking end 11 of the spoiler 1 may be arranged along the spiral line 32 on the tower body 3, so that the air can flow through the tower more smoothly and vortex-induced vibration of the tower can be avoided.

[0093] The spoiler of the present invention can also be applied to other technical fields related to avoiding vortex-induced vibration, for example: the outer walls of tall structures such as large chimneys, signal towers, and lamp posts can all be applied. The spoiler of the present invention can achieve the purpose of separating the fluid, changing the flow direction of the fluid, and thus avoiding vortex-induced vibration.

[0094] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A wind turbine tower, comprising a tower body, characterized in that: The tower body is provided with a plurality of spoilers, the spoilers include a spoiler portion and a connecting portion, the spoiler portion includes a flow-breaking end and a plurality of side surfaces, the flow-breaking end and the plurality of side surfaces are connected to form a polyhedron, the flow-breaking end is located at the front end of the spoiler, the connecting portion is an annular connecting portion, and the spoiler portion is arranged outside the annular connecting portion; The plurality of side surfaces constitute a prism, and the flow-breaking end is a side ridge of the prism; The surface where the spoiler and the connecting portion are connected is a plane; A plurality of the spoilers are arranged in layers, and there is a gap between the spoilers of two adjacent layers; The connecting portion is connected to the middle area of ​​the spoiler; The flow-breaking end of the spoiler is arranged on the outer side of the tower body in the form of a spiral line; The annular connecting portion includes a plurality of connecting segments, the plurality of connecting segments are detachably connected to each other, and at least one spoiler is disposed on each of the connecting segments.

2. The wind turbine tower according to claim 1, characterized in that: The angle between the flow-breaking end of the spoiler and the installation plane of the spoiler is 45°-70°.

3. The wind turbine tower according to claim 2, characterized in that: The installation plane of the spoiler is the radial plane of the wind turbine tower.

4. The wind turbine tower according to claim 1, characterized in that: A flange surface is provided on the top of the wind turbine tower, and the distance between the flange surface and the installation plane of the spoiler of the layer closest to the flange surface is 1.5m-3m, and the distance between the installation planes of the spoilers of two adjacent layers is 1.2m-1.5m.

5. The wind turbine tower according to claim 1, characterized in that: The gap between the wind turbine tower and the spoiler is sealed with silica gel.

6. The wind turbine tower according to claim 1, characterized in that: The material of the spoiler is stainless steel.

7. The wind turbine tower according to claim 1, characterized in that: The spoiler is used to suppress the vortex-induced vibration of the wind turbine tower.

8. The wind turbine tower according to claim 1, characterized in that: The connecting portion is a connecting plate.

9. The wind turbine tower according to claim 1, characterized in that: The annular connecting part is composed of three connecting segments, and each of the connecting segments is connected by fasteners.

10. The wind turbine tower according to claim 1, characterized in that: The connecting portion is connected to the spoiler portion by welding.

11. The wind turbine tower according to claim 1, characterized in that: The number of the plurality of side surfaces is 5, the 5 side surfaces form a triangular prism, and the flow-breaking end is a side ridge of the triangular prism.

12. The wind turbine tower according to claim 11, characterized in that: The triangular prism is a shell with an internal hollow structure, and the thickness of the shell is 0.5mm-5mm.

13. The wind turbine tower according to claim 11, characterized in that: The triangular prism is a right prism, the bottom surface of the right prism is an equilateral triangle, and the side length of the equilateral triangle is 200mm-300mm.

14. A wind turbine, characterized in that: It comprises a wind turbine tower as described in any one of claims 1 to 13.

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