Inflatable turbulent flow device

Abstract

The utility model discloses an inflatable turbulent flow device which is formed by connecting a plurality of turbulent flow strip units end to end and winding the turbulent flow strip units on the outer wall of a tower barrel in a spiral rising shape in the vertical direction of the tower barrel. Each turbulent flow strip unit comprises a turbulent flow strip main body, turbulent flow strip end parts arranged at the two ends of the turbulent flow strip main body and connecting pieces used for connecting the adjacent turbulent flow strip units, and each turbulent flow strip main body comprises an air inflation structure which is provided with an air inflation cavity and can be inflated and deflated and a stabilizing structure arranged outside the air inflation structure; and the cross section of the turbulent flow strip main body is a hollow triangle after being inflated. In the transportation process of the inflatable turbulent flow device, the turbulent flow strip main body is in an uninflated state, so that the transportation cost is greatly saved, and the turbulent flow stability is better.

Description

Technical Field

[0001] This utility model patent relates to the field of wind power generation technology, specifically an inflatable turbulence device. Background Technology

[0002] Vortex-induced vibration (VID) of wind turbine towers is a wind-induced vibration phenomenon that occurs in large-span towers under low wind speeds. From a fluid dynamics perspective, any non-streamlined object, under a certain constant flow velocity, will generate vortices that alternately detach from the structure's surface on both sides. If the natural frequency of the tower is close to the vortex emission frequency, the tower will resonate and fail. Therefore, VID is extremely harmful, and the high cost of wind turbine equipment makes it impossible for it to withstand even one instance of this type of damage. Thus, to minimize damage from VID, the wind turbine tower installation process must be completed in one step.

[0003] Generally, two measures can be taken to prevent vortex-induced vibration: First, rigidly reinforce the components or increase their size to improve their stiffness and change their natural frequency to avoid it being close to the vortex emission frequency; second, find ways to change the wake field behind the components to disrupt the regular release of vortices in the wake field, such as installing helical vertical plates on the structure and changing the cross-sectional shape of the structure. Installing baffles on the tower can disrupt the wind trajectory, preventing the formation of vortices with stable frequencies, thereby avoiding destructive vortex-induced vibration caused by frequencies matching the tower's own frequency.

[0004] Existing spoiler structures, such as the spoiler device for a wind turbine tower disclosed in CN219827362U, include multiple spoilers that are spirally wound around the outer wall of the tower along its height. The main body of each spoiler is an inflatable structure made of windproof cloth or rubber. The wind turbine tower has multiple upper mounting holes and multiple lower mounting holes penetrating the tower wall. The upper mounting holes are located at the same height and are evenly spaced to fix the top ends of the spoilers. The lower mounting holes are located at the same height and are evenly spaced to fix the bottom ends of the spoilers. While this spoiler device can mitigate some airflow, it suffers from poor stability and is time-consuming and labor-intensive to install. Utility Model Content

[0005] To at least partially solve the above problems, according to a first aspect of the present invention, an inflatable turbulence device is provided, which has a stable structure, simplifies installation, and saves manpower.

[0006] The present invention adopts the following technical solution:

[0007] An inflatable spoiler device for wind turbine towers includes multiple spoiler strip units. Each spoiler strip unit includes a spoiler strip body, spoiler strip ends disposed at both ends of the spoiler strip body, and connectors for connecting adjacent spoiler strip units. The spoiler strip body includes an inflation structure with an inflation cavity that can be inflated and deflated, and a stabilizing structure disposed outside the inflation structure. After inflation, the cross-section of the spoiler strip body is a hollow triangle.

[0008] In the above technical solution, the main body of the spoiler strip adopts a two-layer structure. The first layer is an internal inflation structure, which is used for inflation and deflation. During the transportation and other stages before use, it is in an uninflated stage, at which time its volume can be minimized for easy transportation, handling, and storage. In use, air is pumped into the inflation chamber to achieve the spoiler strip's turbulence-causing effect. The second layer is an external stabilizing structure, which is composited around the main body of the spoiler strip. This structure not only provides excellent protection for the internal inflation structure but, crucially, also works in conjunction with the inflation structure to stabilize the entire spoiler strip, making its turbulence-causing effect more stable.

[0009] In addition, in this solution, the cross-section of the main body of the spoiler is a hollow triangle, which has better stability compared to the solid structure with internal air filling in the prior art. Moreover, this hollow structure can be used in conjunction with the connectors in this solution to further improve the stability of the spoiler.

[0010] Preferably, the stabilizing structure is a polymer foam layer composited on the outer surface of the inflatable structure. The polymer foam is preferably polyolefin foam, such as IXPE, XPE or EPE. Compared with the currently widely used pearl cotton, the baffle strip has better resistance to high and low temperatures, weathering and ultraviolet radiation, and is more adaptable to the harsh outdoor environment of wind turbine tower installation.

[0011] Preferably, the connector includes a stabilizing rope and a buckle at the end of the stabilizing rope. The stabilizing rope axially passes through the main body of the spoiler and exits from the end of the spoiler. Adjacent spoiler units are connected end-to-end by the buckle. Each spoiler unit not only determines the complexity of installation but also affects the stability of the spoiler main body. In this solution, the connector is set in the form of a stabilizing rope and a buckle, and the stabilizing rope passes through the spoiler main body. This not only simplifies the connection and installation between the various spoiler units but also allows the more tensile-resistant connecting rope to serve as the load-bearing body, thus limiting the swaying of the spoiler main body in the wind and making the entire spoiler device more stable.

[0012] Preferably, the inflation chamber of the inflation structure consists of multiple independent air columns, which can prevent the entire sac-like structure from leaking air if a single inflation chamber is punctured and ruptured.

[0013] Preferably, the hollow triangle is an equilateral hollow triangle.

[0014] Preferably, the inflatable structure is a structure with an inflatable cavity surrounded by a polyolefin film.

[0015] Preferably, the thickness of the polyolefin foam layer is 1 mm to 10 mm.

[0016] Preferably, the end of the spoiler gradually tightens from the spoiler body to the distal end, forming a tightening opening at the distal end.

[0017] In a second aspect, this utility model provides a wind turbine tower, including an inflatable turbulence device as described above, which is spirally wound around the outer wall of the tower along the height direction.

[0018] Preferably, the multiple spoiler strip units are arranged at equal intervals.

[0019] By implementing the above technical solution, compared with the prior art, this utility model has the following beneficial effects:

[0020] 1. This utility model patent forms a triangular structure by inflating the airbag, which is structurally stable and reduces the mass of traditional spoilers, saving manpower during installation.

[0021] 2. Before the use of the deflector device, this utility model is in sheet form, which reduces the volume of the deflector strip and transportation costs. After the deflector strip is transported to the installation site, an inflation device can be used to fill the sheet-shaped air column with gas to form a bladder-like structure before the deflector strip is installed.

[0022] 3. This utility model patent is a composite structure formed by polymer film and polymer foam capsule structure, which has good weather resistance and can maintain good performance under long-term wind and sun exposure. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the inflatable turbulence device shown in this utility model.

[0024] Figure 2 This is a cross-sectional view of the main body of the inflatable spoiler.

[0025] In the diagram, 10-spoiler body, 101-inflatable structure, 102-stabilizing structure, 1021-inflatable cavity, 20-spoiler end, 30-connector, 31-stabilizing rope, 32-locking buckle. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0027] Example 1

[0028] As shown in the attached figure, an inflatable turbulence device for wind turbine towers includes multiple turbulence strip units that are spirally wound around the outer wall of the tower along the height direction and are arranged at equal intervals.

[0029] The structure of the spoiler strip unit includes a spoiler strip body 10, spoiler strip end pieces 20 disposed at both ends of the spoiler strip body 10, and connecting members 30 for connecting adjacent spoiler strip units. The spoiler strip body 10 is elongated and includes an inflation structure 102 with an inflation cavity 1021 and a stabilizing structure 101 compositely formed on the outer surface of the inflation structure. The inflation structure 102 has an inflation port communicating with the inflation cavity 1021, allowing inflation of the inflation cavity 1021. The inflation structure 102 is a structure with an inflation cavity formed by a polymer film, forming an equilateral triangle, that is, after inflation, the cross-section of the spoiler strip body 10 is a hollow triangle. The inflation cavity 1021 is configured as multiple independent air columns to prevent the entire sac-like structure from leaking air if the inflation cavity is punctured and ruptured.

[0030] The stabilizing structure 101 is a polymer foam layer, such as IXPE, XPE, or EPE, composited on the outer surface of the inflatable structure 102. These materials have better resistance to high and low temperatures, weathering, and ultraviolet radiation, making them more adaptable to the harsh outdoor environment of wind turbine tower installation. The thickness of the polyolefin foam layer is 1 mm to 10 mm, preferably 2 mm to 5 mm.

[0031] The spoiler end 20 is connected to the spoiler body 10, and gradually tightens from the spoiler body 10 to the distal end, forming a tightening opening at the distal end. The spoiler end 20 is a single-layer structure, that is, it has only one layer of stabilizing structure 101, which is integrally connected with the stabilizing structure 101 of the spoiler body 10.

[0032] The connector 30 includes a stabilizing rope 31 and a locking buckle 32 disposed at the end of the stabilizing rope 31. The stabilizing rope 31 is made of nylon rope, runs longitudinally through the spoiler body 10, and exits from the spoiler end 20. It is knotted and locked at the tightening position of the spoiler end 20 for positioning. The locking buckle 32 is a metal connecting buckle. Adjacent spoiler units are connected end-to-end through the locking buckle.

[0033] This utility model patent has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that the utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the guidance of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An inflatable turbulence-inducing device, characterized in that, It includes multiple spoiler strip units. Each spoiler strip unit includes a spoiler strip body, spoiler strip ends disposed at both ends of the spoiler strip body, and a connector for connecting adjacent spoiler strip units. The spoiler strip body includes an inflation structure with an inflation chamber that can be inflated and deflated, and a stabilizing structure disposed outside the inflation structure. After inflation, the cross-section of the spoiler strip body is a hollow triangle.

2. The inflatable turbulence device according to claim 1, characterized in that, The stabilizing structure is a polyolefin foam layer composited on the outer surface of the inflatable structure.

3. The inflatable turbulence device according to claim 1, characterized in that, The connector includes a stabilizing rope and a buckle disposed at the end of the stabilizing rope. The stabilizing rope passes axially through the main body of the spoiler and exits from the end of the spoiler. Adjacent spoiler units are connected end to end by the buckle.

4. The inflatable turbulence device according to claim 1, characterized in that, The inflation chamber of the inflation structure consists of multiple independent air columns.

5. The inflatable turbulence device according to claim 1, characterized in that, The hollow triangle is an equilateral hollow triangle.

6. The inflatable turbulence device according to claim 1, characterized in that, The inflatable structure is a structure with an inflatable cavity surrounded by a polyolefin membrane.

7. The inflatable turbulence device according to claim 2, characterized in that, The thickness of the polyolefin foam layer is 1 mm to 10 mm.

8. The inflatable turbulence device according to claim 1, characterized in that, The end of the spoiler gradually tightens from the main body of the spoiler to the far end, forming a tightening opening at the far end.

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