Wind-resistant protection device of flat single-shaft tracking support and operation method of wind-resistant protection device

Abstract

The invention provides a wind-resistant protection device of a flat single-shaft tracking support, which is characterized in that a damping box is fixed on one side of a stand column, liquid is filled in the damping box, a rotating shaft is rotatably connected in the damping box, a plurality of damping blades are fixed on the rotating shaft, and the rotating shaft is in power connection with a main beam through a flexible transmission structure; a first transmission wheel with a flexible transmission structure is fixed on the rotating shaft, and a second transmission wheel with a flexible transmission structure is fixed on the main beam, so that the torsional amplitude caused by wind-induced vibration is reduced while the normal operation of the flat single-axis tracking bracket is ensured to adjust the pitch angle of the photovoltaic module, and the wind resistance of the flat single-axis tracking bracket is further greatly improved; the flat single-shaft tracking bracket is protected from being damaged by wind; the structure is simple, and machining, installation and maintenance are convenient; the cost is low, and the manufacturing cost can be obviously reduced through batch production.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic modules, and in particular to a wind-resistant protection device for a flat single-axis tracking bracket and an operating method thereof. Background Art

[0002] A flat single-axis tracking mount is a common tracking photovoltaic mount structure, often used in large-scale centralized photovoltaic power plants. Because it can adjust the pitch angle of the photovoltaic panels according to changes in the sun's altitude and angle, it can improve power generation efficiency by 8% to 20% compared to fixed photovoltaic mounts. A flat single-axis tracking mount typically consists of a single row of multiple columns and a slender main beam, to which the photovoltaic panels are fixed. The structural torsional stiffness is primarily determined by the slender main beam and its boundary conditions, resulting in low torsional stiffness and a low natural frequency. Therefore, this structural form is prone to buffeting at normal wind speeds and large-amplitude flutter in strong winds. This can lead to fatigue damage to key components of the photovoltaic mount or damage to the entire structure from large-amplitude flutter. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a wind-resistant protection device for a flat single-axis tracking bracket, which can solve the problem that the main beam is prone to vibration at normal wind speeds and is prone to large-amplitude flutter under strong wind conditions.

[0004] To this end, the present invention adopts the following technical solutions: A windproof protection device for a flat single-axis tracking bracket, wherein a damping box is fixed on one side of a column, the damping box is filled with liquid, a rotating shaft is rotatably connected to the damping box, a plurality of damping blades are fixed on the rotating shaft, the rotating shaft and the main beam are dynamically connected through a flexible transmission structure, a first transmission wheel of the flexible transmission structure is fixed on the rotating shaft, and a second transmission wheel of the flexible transmission structure is fixed on the main beam.

[0005] On the basis of adopting the above technical solutions, the present invention may also adopt the following further technical solutions, or use these further technical solutions in combination: The flexible transmission structure is a sprocket structure, the first transmission wheel is a first transmission sprocket, the second transmission wheel is a second transmission sprocket, the first transmission sprocket is fixedly connected to the rotating shaft, the second transmission sprocket is fixedly connected to the main beam, and the first transmission sprocket and the second transmission sprocket are connected by a transmission chain power.

[0006] The flexible transmission structure is a pulley structure, the first transmission wheel is a first conveyor pulley, the second transmission wheel is a second conveyor pulley, the first conveyor pulley is fixedly connected to the rotating shaft, the second conveyor pulley is fixedly connected to the main beam, and the first conveyor pulley and the second conveyor pulley are connected by a conveyor belt power.

[0007] One end of the rotating shaft is fixed to the side wall of the damping box through a fixed bearing.

[0008] A corbel is fixed on one side of the column, a support plate is fixed on the upper side of the corbel, and the damping box is fixed on the support plate.

[0009] The damping box is made of stainless steel or plastic.

[0010] The liquid filled in the damping box is water, oil or viscoelastic polymer.

[0011] The number of the damping blades is 2 to 10, and a plurality of water holes are provided on the damping blades.

[0012] The damping blade is arranged obliquely to the rotating shaft.

[0013] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide an operating method for a wind-resistant protection device of a flat single-axis tracking bracket, which can solve the problem that the main beam is prone to vibration at normal wind speeds and is prone to large-amplitude flutter under strong wind conditions.

[0014] To this end, the present invention adopts the following technical solutions: A method for operating a wind protection device for a flat single-axis tracking bracket comprises the following steps: 1. The wind load drives the main beam to rotate rapidly, and the second transmission wheel rotates accordingly, thereby driving the first transmission wheel to rotate; the first transmission wheel rotates, thereby driving the rotating shaft to rotate; the rotating shaft rotates, thereby driving the damping blades to rotate; 2. When the damping blades rotate, the liquid in the damping box provides resistance to the continued rotation of the damping blades due to the combined effects of inertia and turbulence, thereby reducing the amplitude of the wind-induced vibration of the main beam.

[0015] Compared with the existing technology, the present invention has the following advantages and beneficial effects: ensuring the normal operation of the flat single-axis tracking bracket and adjusting the pitch angle of the photovoltaic module while reducing the torsional amplitude caused by wind-induced vibration, thereby greatly improving the wind resistance of the flat single-axis tracking bracket and protecting the flat single-axis tracking bracket from wind damage; the structure is simple and easy to process, install and maintain; the cost is low, and mass production can significantly reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred embodiments of the present invention are described below in conjunction with specific embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent elements with the same or similar functions. However, it should be understood that the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention. In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings, and the positional relationships described in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention.

[0018] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0019] The present invention provides a wind-resistant protection device for a flat single-axis tracking bracket, wherein a damping box 4 is fixed on one side of a column, the damping box 4 is filled with liquid, a rotating shaft 6 is rotatably connected inside the damping box 4, a plurality of damping blades 5 are fixed on the rotating shaft 6, the rotating shaft 6 and the main beam are dynamically connected through a flexible transmission structure, a first transmission wheel 3 of the flexible transmission structure is fixed on the rotating shaft 6, and a second transmission wheel 1 of the flexible transmission structure is fixed on the main beam.

[0020] The second transmission wheel 1 should be firmly connected to the main beam, and when the main beam undergoes a certain angle of torsion displacement, the second transmission wheel 1 should undergo the same angle of torsion displacement. For applicability and economic considerations, the outer diameter of the second transmission wheel 1 should not be too large, usually 150~200mm outer diameter can be used; The outer diameter of the first transmission wheel 3 can be calculated and determined based on the damping force required to suppress the wind-induced vibration of the flat single-axis tracking bracket, and is usually related to parameters such as the number of horizontally arranged rows of photovoltaic modules, the bracket span (column spacing), and the basic wind speed of the photovoltaic bracket on site design.

[0021] The flexible transmission structure is a sprocket structure, the first transmission wheel 3 is the first transmission sprocket, the second transmission wheel 1 is the second transmission sprocket, the first transmission sprocket is fixedly connected to the rotating shaft 6, and the second transmission sprocket is fixedly connected to the main beam. The first transmission sprocket and the second transmission sprocket are dynamically connected through the transmission chain 2.

[0022] The flexible transmission structure is a pulley structure, the first transmission wheel 3 is the first conveyor pulley, the second transmission wheel 1 is the second conveyor pulley, the first conveyor pulley is fixedly connected to the rotating shaft 6, and the second conveyor pulley is fixedly connected to the main beam. The first conveyor pulley and the second conveyor pulley are connected by power through the conveyor belt 2.

[0023] It should be ensured that when the second transmission wheel 1 undergoes a certain angle of torsional displacement, the first transmission wheel 3 is driven to undergo a certain angle of torsional displacement through the transmission chain (belt) 2, and the transmission chain (belt) 2 and the second transmission wheel 1 and the first transmission wheel 3 only roll relative to each other without sliding.

[0024] One end of the rotating shaft 6 is fixed to the side wall of the damping box 4 through a fixed bearing 7 .

[0025] A corbel 9 is fixed to one side of the column, a support plate 8 is fixed on the upper side of the corbel 9 , and the damping box 4 is fixed on the support plate 8 .

[0026] In this embodiment, the corbel 9 is welded to the column, the support plate 8 is welded to the corbel 9, and the damping box 4 is welded to the support plate 8 or bolted.

[0027] The damping box is made of stainless steel or plastic.

[0028] The liquid filled in the damping box 4 is water, oil or viscoelastic polymer.

[0029] The oil can be diesel, gear oil, silicone oil, etc.

[0030] The number of the damping blades 5 is 2 to 10, and a plurality of water holes are formed on the damping blades 5 .

[0031] The water hole can be in various shapes such as round, square, etc.

[0032] The damping blades 5 are arranged obliquely to the rotating shaft 6 to increase the water blocking area.

[0033] The material and surface roughness of the blades can also be designed and selected as needed to increase the resistance of the liquid to the blades.

[0034] The rotating shaft 6 can be installed parallel to the ground or perpendicular to the ground.

[0035] The present invention provides a method for operating a wind protection device for a flat single-axis tracking bracket, comprising the following steps: 1. The wind load drives the main beam to rotate rapidly, and the second transmission wheel 1 rotates accordingly, thereby driving the first transmission wheel 3 to rotate; the first transmission wheel 3 rotates, thereby driving the rotating shaft 6 to rotate; the rotating shaft 6 rotates, thereby driving the damping blade 5 to rotate; Second, when the damping blade 5 rotates, the liquid in the damping box 4 provides resistance to the continued rotation of the damping blade 5 due to the combined effects of inertia and turbulence, thereby reducing the amplitude of the wind-induced vibration of the main beam.

[0036] When the driving device (motor and hydraulic rod, etc.) of the flat single-axis tracking bracket slowly rotates the main beam, the wind-resistant protection device of the flat single-axis tracking bracket of the present invention provides very small resistance and does not affect the normal pitch angle adjustment of the photovoltaic module. When the wind load drives the main beam to rotate faster, the wind-resistant protection device of the flat single-axis tracking bracket of the present invention can provide obvious resistance, significantly reduce its wind-induced vibration amplitude, and protect the flat single-axis tracking bracket from wind damage.

[0037] To increase the resistance force exerted by the liquid inside the damping box 4 on the damping blade 5, an appropriate amount of turbulence spikes can be installed inside the damping box 4 to increase the turbulence effect; the damping box is filled with a relatively viscous liquid, such as gear oil, silicone oil or viscoelastic polymer.

[0038] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use the wind-resistant protection device of the flat single-axis tracking bracket of the present invention, and can produce the positive effects described in the present invention.

[0039] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two mechanisms, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0040] In the description of the present invention, it should be understood that terms such as "one end," "the other end," "outer side," "inner side," "horizontal," "end," "length," "outer end," "left," and "right" indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the mechanisms or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. The terms "first" and "second" are used solely for brevity and are not intended to indicate or imply relative importance.

[0041] Furthermore, in practicing the claimed invention, variations to the disclosed embodiments may be understood and effected by those skilled in the art through a study of the drawings, the disclosure, and the appended claims. Furthermore, in the claims and the specification, words such as "comprise," "comprising," and the like do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications made according to the present invention are covered by the scope of the claims of the present invention and will not be listed one by one here.

Claims

1. A wind protection device for a flat single-axis tracking bracket, characterized in that: A damping box (4) is fixed on one side of the column, the damping box (4) is filled with liquid, a rotating shaft (6) is rotatably connected in the damping box (4), a plurality of damping blades (5) are fixed on the rotating shaft (6), the rotating shaft (6) and the main beam are dynamically connected via a flexible transmission structure, a first transmission wheel (3) of the flexible transmission structure is fixed on the rotating shaft (6), and a second transmission wheel (1) of the flexible transmission structure is fixed on the main beam.

2. The wind protection device for a flat single-axis tracking bracket according to claim 1, characterized in that: The flexible transmission structure is a sprocket structure, the first transmission wheel (3) is a first transmission sprocket, the second transmission wheel (1) is a second transmission sprocket, the first transmission sprocket is fixedly connected to the rotating shaft (6), the second transmission sprocket is fixedly connected to the main beam, and the first transmission sprocket and the second transmission sprocket are dynamically connected via a transmission chain (2).

3. The wind protection device for a flat single-axis tracking bracket according to claim 1, characterized in that: The flexible transmission structure is a pulley structure, the first transmission wheel (3) is a first conveyor pulley, the second transmission wheel (1) is a second conveyor pulley, the first conveyor pulley is fixedly connected to the rotating shaft (6), the second conveyor pulley is fixedly connected to the main beam, and the first conveyor pulley and the second conveyor pulley are connected in power via a conveyor belt (2).

4. The wind protection device for a flat single-axis tracking bracket according to claim 1, characterized in that: One end of the rotating shaft (6) is fixed to the side wall of the damping box (4) via a fixed bearing (7).

5. The wind protection device for a flat single-axis tracking bracket according to claim 1, characterized in that: A corbel (9) is fixed to one side of the column, a support plate (8) is fixed on the upper side of the corbel (9), and the damping box (4) is fixed on the support plate (8).

6. The wind protection device for a flat single-axis tracking bracket according to claim 1, characterized in that: The damping box is made of stainless steel or plastic.

7. The wind protection device for a flat single-axis tracking bracket according to claim 1, characterized in that: The liquid filled in the damping box (4) is water, oil or viscoelastic polymer.

8. The wind protection device for a flat single-axis tracking bracket according to claim 1, characterized in that: The number of the damping blades (5) is 2 to 10, and a plurality of water holes are provided on the damping blades (5).

9. The wind protection device for a flat single-axis tracking bracket according to claim 1, characterized in that: The damping blade (5) is arranged obliquely with respect to the rotating shaft (6).

10. A method for operating a wind protection device for a flat single-axis tracking bracket, characterized in that: The following steps are involved:

1. The wind load drives the main beam to rotate rapidly, and the second transmission wheel (1) rotates accordingly, thereby driving the first transmission wheel (3) to rotate; The first transmission wheel (3) rotates, thereby driving the rotating shaft (6) to rotate; the rotating shaft (6) rotates, thereby driving the damping blade (5) to rotate; Second, when the damping blade (5) rotates, the liquid in the damping box (4) provides resistance to the continued rotation of the damping blade (5) due to the combined effects of inertia and turbulence, thereby reducing the amplitude of the wind-induced vibration of the main beam.

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