A vibration suppression system for photovoltaic bracket and single-axis photovoltaic bracket

Abstract

The present invention provides a vibration suppression system for a photovoltaic bracket and a single-axis photovoltaic bracket. The vibration suppression system includes a constraint protection unit, and the constraint protection unit includes a force transmission component, a vibration displacement amplification component, an eddy current energy dissipation component, and a high wind protection component. The input end of the force transmission component is connected to the two ends of the photovoltaic bracket in the rotation direction; the high wind protection component includes a magnetic conductor arranged on the outside of the transmission shaft, and the magnetic conductor has a magnetic attraction with the transmission shaft when the wind speed reaches the critical wind speed of static wind instability of the bracket. The single-axis photovoltaic bracket includes a photovoltaic panel, a photovoltaic panel rotating beam, and a vibration suppression system. The constraint protection unit of the vibration suppression system is divided into two groups, and the two groups of constraint protection units are respectively arranged at the two ends of the photovoltaic panel along the length direction; the force transmission component of the constraint protection unit is arranged parallel to the torsion surface of the photovoltaic panel, and the transmission shaft is arranged horizontally. The present invention has the advantages of avoiding damage to the bracket during wind vibration and improving the safety and reliability of the bracket.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic brackets and photovoltaic building integrated vibration reduction, and in particular to a vibration suppression system of a photovoltaic bracket and a single-axis photovoltaic bracket. Background Art

[0002] The single-axis photovoltaic bracket is a common solar photovoltaic panel installation system. The single-axis photovoltaic bracket can be set up independently. The single-axis photovoltaic bracket is a structure in the building and belongs to an ancillary building facility. The single-axis photovoltaic bracket can also be designed to be integrated with the building structure to form photovoltaic building integration. Photovoltaic building integration is a solar photovoltaic power generation system in which the single-axis photovoltaic bracket and the building are designed, constructed and installed at the same time. As part of the external structure of the building, this system has both the function of power generation and the function of building components and building materials, forming a perfect unity with the building. The vibration suppression of the single-axis photovoltaic bracket and photovoltaic building integration has become an important factor in ensuring whether the building has safety hazards.

[0003] The existing single-axis photovoltaic bracket can automatically adjust the angle of the photovoltaic panel to maximize the absorption of solar energy. Its power generation efficiency is better than that of traditional fixed and fixed adjustable photovoltaic brackets. However, the existing single-axis photovoltaic bracket has low torsional stiffness, which makes it more prone to wind vibration response than traditional photovoltaic brackets, resulting in fatigue damage to local components and / or buildings, and even flutter and wind damage in extremely windy weather, causing major safety hazards and property losses. Specifically:

[0004] There are three main types of wind-induced damage encountered by single-axis photovoltaic brackets: the first type of wind vibration problem is that in normal working conditions, reciprocating pure torsional vibration with the photovoltaic panel rotating beam as the torsion center occurs at any wind speed. This type of vibration is likely to cause fatigue fracture damage to the connecting components (such as bolts) in the bracket; the second type of wind vibration problem is that in strong wind conditions, when the wind speed reaches the critical wind speed of the bracket's flutter, the vibration occurs in the form of pure torsional flutter that continuously diverges with the photovoltaic panel rotating beam as the torsion center. If the strong wind weather continues for a certain period of time, the bracket as a whole may suffer irreversible wind damage. The single-axis photovoltaic bracket is prone to flutter instability within the inclination angle range of ±30°; the third type of wind vibration problem is that in strong wind conditions, when the wind speed reaches the critical wind speed of static wind instability of the bracket, the bracket as a whole will suffer static wind instability damage, thereby causing fatigue damage to local components and / or buildings.

[0005] In response to the above-mentioned wind vibration problems of type (1) and type (2), the existing method is to improve the damping ratio and stiffness of the entire bracket, that is, to set two "damping rod" type viscous dampers at the ends of the single-axis photovoltaic bracket as vibration reduction components. The two ends of the viscous damper are respectively connected to the supporting column of the photovoltaic bracket and the photovoltaic panel rotating beam to improve the overall damping ratio and stiffness of the bracket by adding viscous damping. Although it can alleviate the wind vibration problems of type (1) and type (2) to a certain extent, the existing "damping rod" type viscous damper has the following problems:

[0006] For the first type of wind vibration problem, that is, in normal working state, the viscous damper requires large starting friction and low sensitivity. Therefore, its vibration reduction effect on small vibrations caused by breezy weather is limited, and it is difficult to substantially improve the fatigue resistance of the bracket. There is still a risk of component fatigue fracture due to wind-induced vibration. At the same time, the viscous damper provides damping force by generating heat energy through medium friction. It is easy to damage, has a short service life, and has a high replacement cost.

[0007] For the second type of wind vibration problem, that is, large amplitude vibration under strong wind, due to the limitations of the viscous damper structure and layout position, the angle between the damper rod and the normal of the photovoltaic panel is large, and a large amount of damping force is output in the direction parallel to the photovoltaic panel. The torsional response of the single-axis photovoltaic bracket is converted into the translational displacement of the damper, which makes it difficult for the viscous damper to maintain efficient damping force in the direction perpendicular to the photovoltaic panel in the working state. When a large torsion occurs in strong winds, the damping force output efficiency is low, and the effect of increasing the critical wind speed of flutter is limited. The rod-type viscous damper needs more damping force output to cope with large torsional motion, and the damping force effect is greatly reduced.

[0008] For the third type of wind vibration problem, the current method is usually to place the photovoltaic panel in a horizontal state at 0° to obtain the highest critical wind speed for static wind instability with the smallest windward area to prevent the bracket from being damaged. However, since the existing method requires the photovoltaic panel to be placed horizontally, it is necessary to abandon the photovoltaic panel inclination state that tracks the sun to obtain the highest power generation efficiency. At this time, the utilization efficiency of solar energy is greatly reduced, resulting in a decrease in power generation. At the same time, when the windward area of ​​the bracket is small and the photovoltaic component is in a small inclination range, it is easy to cause the second type of wind vibration problem under the action of strong winds, resulting in flutter instability. Summary of the invention

[0009] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a vibration suppression system and a single-axis photovoltaic bracket that can avoid bracket damage during wind vibration and improve the safety and reliability of the bracket.

[0010] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0011] A vibration suppression system for a photovoltaic bracket includes a restraint protection unit, wherein the restraint protection unit includes a force transmission component, a vibration displacement amplification component, an eddy current energy dissipation component and a high wind protection component which are sequentially connected via a transmission shaft, wherein the input end of the force transmission component is connected to two end portions of the photovoltaic bracket in a rotation direction; the high wind protection component includes a magnetic conductor arranged on the outside of the transmission shaft, wherein the magnetic conductor has a magnetic attraction force with the transmission shaft when the wind speed reaches the critical wind speed of static wind instability of the bracket.

[0012] As a further improvement of the above technical solution:

[0013] The force transmission assembly includes a force transmission rod and two force transmission parts. The force transmission rod is arranged parallel to the photovoltaic bracket when no wind vibration occurs. The two force transmission parts are symmetrically arranged between the photovoltaic bracket and the force transmission rod, and the two ends of each force transmission part are respectively connected to one end of the force transmission rod and one end of the photovoltaic bracket along the width direction; the force transmission rod is connected to the vibration displacement amplification assembly through the transmission shaft.

[0014] The force transmission member is a force transmission rope, a force transmission chain or a force transmission rod; when the force transmission member is a force transmission rope or a force transmission chain, the force transmission assembly also includes two elastic members that ensure that the force transmission member is always in a balanced state, and the two elastic members are respectively arranged at both ends of the force transmission rod, and the elastic members are arranged vertically and connected between the force transmission rod and the ground.

[0015] The vibration displacement amplification component is an acceleration amplification gear component, which includes an input gear, an amplification gear component and an output gear that are meshed in sequence. The center lines of the input gear and the output gear coincide with each other. The force transmission component is connected to the input gear through the transmission shaft, and the output gear is connected to the eddy current energy dissipation component through the transmission shaft.

[0016] The amplifying gear component comprises at least one primary amplifying gear component, and the amplifying gear component comprises a large-diameter accelerating gear and a small-diameter accelerating gear coaxially fixedly arranged;

[0017] When the amplifying gear component is in the first stage, the small-diameter acceleration gear is meshed with the input gear, and the large-diameter acceleration gear is meshed with the output gear; the diameter ratio of the small-diameter acceleration gear to the input gear, and the diameter ratio of the output gear to the large-diameter acceleration gear are both less than 1.

[0018] The large-diameter acceleration gear and the small-diameter acceleration gear of the adjacent-stage amplifying gear component are meshed with each other.

[0019] There are two groups of amplifying gear components, and the two groups of amplifying gear components are symmetrically arranged with the center of the input gear as the center;

[0020] When there are two groups of amplifying gear components and the amplifying gear components are at least two stages, a force transmission gear component coaxially arranged with the transmission shaft is provided between the two groups of amplifying gear components, and adjacent amplifying gear components are meshed with each other through the force transmission gear component. The force transmission gear component includes a small-diameter force transmission gear and a large-diameter force transmission gear coaxially fixed, the small-diameter force transmission gear is meshed with the large-diameter acceleration gear of the amplifying gear component close to the input side, and the large-diameter force transmission gear is meshed with the small-diameter acceleration gear of the amplifying gear component close to the output side.

[0021] The high wind protection component also includes an adsorption plate, which is arranged on the radially outer side of the transmission shaft and is fixedly connected to the transmission shaft through a first connecting member; the magnet is arranged opposite to the adsorption plate and is located on the outer side of the adsorption plate, and the magnet generates magnetic attraction with the transmission shaft through the adsorption plate.

[0022] The rotating surface of the eddy current energy dissipation component is parallel to the torsion surface of the photovoltaic bracket. The eddy current energy dissipation component includes an annular energy dissipation magnet and an annular conductor plate which are mutually nested. The annular energy dissipation magnet or the annular conductor plate is fixedly connected to the transmission shaft through a second connecting member.

[0023] A single-axis photovoltaic bracket comprises a photovoltaic panel, a photovoltaic panel rotating beam and the vibration suppression system described above, wherein the vibration suppression system comprises two groups of constraint protection units, and the two groups of constraint protection units are respectively arranged at the two ends of the photovoltaic panel along the length direction; the force transmission component of the constraint protection unit is arranged parallel to the torsional surface of the photovoltaic panel, and the transmission shaft is arranged horizontally.

[0024] As a further improvement of the above technical solution:

[0025] The photovoltaic panel is installed on the photovoltaic panel rotating beam through a connecting support plate; the force transmission member of the force transmission assembly is connected to one end of the connecting support plate along the width direction.

[0026] Compared with the prior art, the advantages of the present invention are:

[0027] The vibration suppression system of the photovoltaic bracket of the present invention includes a constraint protection unit, and the constraint protection unit components include a force transmission component, a vibration displacement amplification component, an eddy current energy dissipation component and a high wind protection component connected in sequence through a transmission shaft, so that the wind vibration constraint and component protection functions are integrated into one setting, and the layout is compact, the space occupied is small, and the cost is low.

[0028] The input end of the force transmission component of the present invention is connected to the two end parts of the photovoltaic bracket along the rotation direction, so that the torsional response of the photovoltaic bracket is transmitted to the vibration displacement amplification component through the force transmission component along the end part of the photovoltaic bracket in the rotation direction; the vibration displacement amplification component amplifies the torsional response and transmits it to the eddy current energy dissipation component for damping and vibration reduction. The torsional response amplification improves the energy dissipation sensitivity of the eddy current energy dissipation component, so that the damping force generated by the eddy current energy dissipation component is increased, and efficient damping energy dissipation is achieved, thereby solving the problem of damage to the bracket and / or building during different wind vibrations.

[0029] The eddy current energy dissipation component of the present invention is a frictionless, non-contact energy dissipation and vibration reduction component with low starting friction. The eddy current energy dissipation component combined with the vibration displacement amplification component can substantially improve the vibration reduction effect of the photovoltaic bracket even under a small amplitude under the action of a breeze, improve the fatigue resistance of the bracket, and avoid the occurrence of wind-induced vibration fatigue fracture of the components. Compared with the way that the viscous damper provides damping force through friction, the non-contact damping force provided by the eddy current energy dissipation component effectively reduces the possibility of fatigue damage to local components and / or buildings. The energy dissipation component has a long service life and is easy to disassemble, repair and maintain. The cost is low.

[0030] The present invention can provide magnetic attraction to the transmission shaft through the strong wind protection component in strong wind conditions. The torsional response of the photovoltaic bracket is transmitted to the strong wind protection component through the transmission shaft. When the wind speed reaches the critical wind speed of static wind instability of the bracket, the magnetic conductor of the strong wind protection component has a magnetic attraction with the transmission shaft to avoid rotation of the transmission shaft, thereby improving the torsional stiffness of the overall structure, thereby avoiding the occurrence of torsional flutter and improving the safety and reliability of the photovoltaic bracket.

[0031] The single-axis photovoltaic bracket of the present invention also has the above-mentioned advantages, and the vibration suppression system has two groups of constraint protection units, which are respectively arranged at the two ends of the photovoltaic panel along the length direction; the force transmission component of the constraint protection unit is arranged parallel to the torsional surface of the photovoltaic panel, and the transmission shaft is arranged horizontally, so that the torsional response of the photovoltaic bracket is effectively and losslessly transmitted to the vibration displacement amplification component through the force transmission component at the end along the width direction of the photovoltaic bracket, thereby improving the vibration reduction effect of the photovoltaic bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0033] Figure 1 It is a structural schematic diagram of a single-axis photovoltaic support of the present invention;

[0034] Figure 2 yes Figure 1 A cross-sectional view of section AA;

[0035] Figure 3 is an internal schematic diagram of the vibration suppression system of the present invention;

[0036] Figure 4 yes Figure 3 A cross-sectional view of the BB section;

[0037] Figure 5 yes Figure 3 A cross-sectional view of the CC section;

[0038] Figure 6 It is a three-dimensional structural schematic diagram of the vibration displacement amplification component of the present invention;

[0039] Figure 7 yes Figure 6 Top view of the .

[0040] The symbols in the figure represent:

[0041] 1. Photovoltaic panel; 2. Photovoltaic panel rotating beam; 3. Constraint protection unit; 31. Transmission shaft; 32. Force transmission component; 321. Force transmission rod; 322. Force transmission member; 323. Elastic member; 33. Vibration displacement amplification component; 331. Input gear; 332. Amplification gear component; 3321. Large diameter acceleration gear; 3322. Small diameter acceleration gear; 333. Output gear; 34. Eddy current energy dissipation component; 341. Annular energy dissipation magnet; 342. Annular conductor plate; 343. Second connecting member; 35. High wind protection component; 351. Magnetic conductor; 352. Adsorption plate; 353. First connecting member; 4. Placement box; 41. Amplification component placement area; 42. Energy dissipation component placement area; 43. Protection component placement area; 5. Connecting support plate. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0043] like Figures 1 to 3The embodiment of the vibration suppression system of the photovoltaic bracket of the present invention is shown. The vibration suppression system of the present invention can be used for vibration reduction of a flat single-axis photovoltaic bracket, an inclined single-axis photovoltaic bracket, and photovoltaic building integration. In this embodiment, the vibration suppression system includes a constraint protection unit 3, and the photovoltaic bracket includes a photovoltaic panel 1. In this embodiment, the constraint protection unit 3 is arranged at the end of the photovoltaic panel 1 along the length direction, so that the constraint protection unit 3 is arranged at the position where the wind vibration displacement of the photovoltaic panel 1 is the largest, and the optimal wind vibration constraint effect can be achieved. The constraint protection unit 3 includes a force transmission component 32, a vibration displacement amplification component 33, an eddy current energy dissipation component 34 and a high wind protection component 35. The input end of the force transmission component 32 is connected to the two ends of the photovoltaic panel 1 along the width direction; the force transmission component 32, the vibration displacement amplification component 33, the eddy current energy dissipation component 34 and the high wind protection component 35 are connected in sequence through a horizontally arranged transmission shaft 31. It integrates the wind vibration constraint and component protection functions into an integrated setting, has a compact layout, occupies a small space, has a low cost, and is easy to be applied later on a photovoltaic bracket without a reserved connection component.

[0044] The force transmission component 32 of the present invention is connected to the two ends of the photovoltaic panel 1 along the width direction, so that the torsional response of the photovoltaic panel 1 along the end of the width direction of the photovoltaic panel 1 (i.e., the rotation direction of the photovoltaic panel 1) is transmitted to the vibration displacement amplification component 33 through the force transmission component 32. The vibration displacement amplification component 33 amplifies the torsional response and transmits it to the eddy current energy dissipation component 34 for damping and vibration reduction, which greatly improves the energy dissipation sensitivity of the eddy current energy dissipation component 34, increases the damping force generated by the eddy current energy dissipation component 34, realizes efficient damping energy dissipation, and solves the problem of damage to the bracket and / or building during different wind vibrations.

[0045] The eddy current energy dissipation component 34 of the present invention is a frictionless, non-contact energy dissipation and vibration reduction component with low starting friction. The eddy current energy dissipation component 34 combined with the vibration displacement amplification component 33 can substantially improve the vibration reduction effect of the photovoltaic bracket even under a small amplitude of breeze, improve the fatigue resistance of the bracket, and avoid the occurrence of fatigue fracture of components due to wind-induced vibration. Compared with the way that the viscous damper provides damping force through friction, the non-contact damping force provided by the eddy current energy dissipation component 34 effectively reduces the possibility of fatigue damage to local components and / or buildings. The energy dissipation component has a long service life and is easy to disassemble, repair and maintain. The cost is low.

[0046] At the same time, the high wind protection component 35 includes a magnetizer 351, which is arranged on the outside of the transmission shaft 31. The magnetizer 351 has a magnetic attraction with the transmission shaft 31 when the wind speed reaches the critical wind speed of the bracket for static wind instability. The torsional response of the photovoltaic panel 1 of the present invention is transmitted to the high wind protection component 35 through the transmission shaft 31. In a high wind state, the high wind protection component 35 can provide a magnetic attraction to the transmission shaft 31 to prevent the transmission shaft 31 from rotating, thereby improving the torsional stiffness of the overall structure, thereby avoiding the occurrence of torsional flutter, and improving the safety and reliability of the photovoltaic bracket and / or the building.

[0047] Furthermore, if Figure 2 and 3 As shown, the force transmission assembly 32 includes a force transmission rod 321 and two force transmission members 322. The force transmission rod 321 is arranged in parallel with the photovoltaic panel 1 when no wind vibration occurs; the two force transmission members 322 are symmetrically arranged between the photovoltaic panel 1 and the force transmission rod 321, and the two ends of each force transmission member 322 are respectively connected to one end of the force transmission rod 321 and one end of the photovoltaic panel 1 along the width direction; the force transmission rod 321 is connected to the vibration displacement amplification assembly 33 through the transmission shaft 31. When the photovoltaic panel 1 is twisted by wind vibration, the two force transmission members 322 transmit the torsional response of the photovoltaic panel 1 to the force transmission rod 321. At this time, the force transmission rod 321 is twisted synchronously with the photovoltaic panel 1, so that the torsional response of the photovoltaic panel 1 can be effectively transmitted to the restraint protection unit 3 through the force transmission assembly 32, and its force transmission structure is simple and low in cost.

[0048] At the same time, the restraint protection unit 3 can be connected to the photovoltaic bracket only through the force transmission rod 321, avoiding the problem of setting complex connecting components on the existing flat single-axis photovoltaic bracket. The connection is simple and convenient, which is convenient for later construction.

[0049] Furthermore, the force transmission member 322 is a force transmission rope, a force transmission chain or a force transmission rod; when the force transmission member 322 is a force transmission rope or a force transmission chain, the force transmission component 32 also includes two elastic members 323, and the two elastic members 323 are respectively arranged at the two ends of the force transmission rod 321, the elastic members 323 are arranged vertically, and the two ends of the elastic members 323 are connected between the force transmission rod 321 and the ground, so as to ensure that the force transmission rope or the force transmission chain is always in a balanced state when the force transmission rod 321 is twisted synchronously with the photovoltaic panel 1, thereby ensuring the effective transmission of the torsional response; at the same time, when the strong wind protection component 35 provides a magnetic attraction to act on the transmission shaft 31 and the force transmission rod 321, since the elastic member 323 is arranged below the force transmission rod 321, the elastic member 323 will not affect the stiffness added by the strong wind protection component 35 to the force transmission rod 321, thereby satisfying the effective transmission of the torque response of the force transmission member 322, and effectively avoiding the torsional flutter of the photovoltaic panel at the critical wind speed of static wind instability.

[0050] like Figure 6 and Figure 7As shown, the vibration displacement amplification component 33 is an acceleration amplification gear component, which includes an input gear 331, an amplification gear component 332 and an output gear 333 that are meshed in sequence. Among them, the center lines of the input gear 331 and the output gear 333 coincide, the force transmission rod 321 of the force transmission component 32 is connected to the input gear 331 through the transmission shaft 31, and the output gear 333 is connected to the eddy current energy dissipation component 34 through the transmission shaft 31. The acceleration amplification gear component has a compact structure, high rigidity and transmission efficiency, and stable transmission.

[0051] In this embodiment, the amplifying gear component 332 is set as a first-stage amplifying gear component 332, and the amplifying gear component 332 includes a large-diameter acceleration gear 3321 and a small-diameter acceleration gear 3322. Among them, the small-diameter acceleration gear 3322 is meshed with the input gear 331, and the diameter ratio of the small-diameter acceleration gear 3322 to the input gear 331 is less than 1; the large-diameter acceleration gear 3321 is meshed with the output gear 333, and the diameter ratio of the output gear 333 to the large-diameter acceleration gear 3321 is less than 1. At this time, the torsional response of the photovoltaic panel 1 is amplified twice and transmitted to the eddy current energy dissipation component 34, which makes the energy dissipation sensitivity of the eddy current energy dissipation component 34 high, the generated damping force is increased, and the damping vibration reduction effect is better. At the same time, the small-diameter acceleration gear 3322 and the large-diameter acceleration gear 3321 are coaxially fixed, and the large-diameter acceleration gear 3321 is used to amplify the diameter of the small-diameter acceleration gear 3322, so as to facilitate the cooperation with the output gear 333 to realize the amplification of the torsional response twice.

[0052] The specific gear diameter ratio of this embodiment can be set according to the required torsion amplification effect, and the speed transmission ratio can be changed by changing the diameter ratio. For example, when the gear diameter ratio is smaller, the transmission ratio is higher, and the speed of the transmission shaft 31 connected to the output gear 333 is amplified, thereby realizing high-speed transmission; when the gear diameter ratio is larger, the transmission ratio is lower, and the speed of the transmission shaft 31 connected to the output gear 333 is reduced, thereby realizing low-speed transmission.

[0053] In other embodiments, the number of stages of the amplifying gear component 332 can also be set according to the required torsion amplification effect. The more stages of the amplifying gear component 332, the better the torsion response amplification effect. For example, the amplifying gear component 332 can also be set to two stages, three stages, etc. In this case, the large-diameter acceleration gear 3321 and the small-diameter acceleration gear 3322 of the adjacent stages of the amplifying gear component 332 are meshed with each other.

[0054] In this embodiment, there are two groups of amplifying gear components 332, and the two groups of amplifying gear components 332 are symmetrically arranged with the center of the input gear 331 as the center, so as to ensure that the torsional response of the photovoltaic panel 1 is reliably and effectively transmitted to the eddy current energy dissipation component 34. In other embodiments, the number of amplifying gear components 332 can be adjusted according to actual conditions, such as three groups, four groups, etc.

[0055] In other embodiments, when there are two groups of amplifying gear components 332 and the amplifying gear components 332 are at least two stages, a force transmission gear component is provided between the two groups of amplifying gear components 332. The force transmission gear component is arranged coaxially with the transmission shaft 31; the force transmission gear component includes a small-diameter force transmission gear and a large-diameter force transmission gear that are coaxially fixed, the small-diameter force transmission gear meshes with the large-diameter acceleration gear 3321 of the amplifying gear component 332 close to the input side, and the large-diameter force transmission gear meshes with the small-diameter acceleration gear 3322 of the amplifying gear component 332 close to the output side. At this time, adjacent amplifying gear components 332 mesh with each other through the force transmission gear component, that is, the large-diameter acceleration gears 3321 of adjacent-stage amplifying gear components 332 mesh with the small-diameter acceleration gear 3322 through the force transmission gear component, which doubles the torsional response while ensuring reliable and effective transmission of the force.

[0056] like Figure 4 As shown, the high wind protection component 35 also includes an adsorption plate 352. The adsorption plate 352 is arranged on the outer side of the transmission shaft 31 in the radial direction, and the adsorption plate 352 is fixedly connected to the transmission shaft 31 through a first connecting member 353; the magnet 351 is arranged opposite to the adsorption plate 352 and is located on the outer side of the adsorption plate 352. When the wind speed reaches the critical wind speed of the static wind instability of the bracket, the magnet 351 generates a magnetic attraction force with the transmission shaft 31 through the adsorption plate 352 to prevent the transmission shaft 31 from rotating under the action of the magnetic attraction force. Its structure is simple and compact, and the torsional stiffness of the overall structure is improved to avoid the occurrence of torsional flutter.

[0057] Furthermore, in this embodiment, the adsorption plates 352 are two arc-shaped adsorption plates, which are symmetrically arranged with the transmission shaft 31 as the center to provide a sufficiently reliable magnetic attraction force for the transmission shaft 31. In other embodiments, the arc length of the arc-shaped adsorption plate and the number of adsorption plates 352 can be set according to the magnitude of the magnetic attraction force, such as one group or three groups; the shape of the adsorption plate 352 can also be set according to actual conditions, such as a semi-circular or strip adsorption plate.

[0058] At the same time, since the combination of the strong wind protection component 35 and the eddy current energy dissipation component 34 can effectively avoid the occurrence of torsional flutter, at this time, there is no need to place the photovoltaic panel 1 in a horizontal state to reduce damage to the bracket. The photovoltaic panel 1 can still maintain the working angle of tracking the sun when the type (3) wind vibration of the background technology occurs. It does not give up the highest power generation efficiency while ensuring the stability and safety of the bracket during the type (3) wind vibration.

[0059] In this embodiment, the adsorption plate 352 is a permanent magnet or a steel plate that is mutually adsorbed with the magnetizer 351. The magnetizer 351 is a component that generates a magnetic field using current. The magnetism of the magnetizer 351 can be controlled by turning the current on and off, and the magnitude of the magnetism can be controlled by adjusting the magnitude of the current.

[0060] Furthermore, the high wind protection component 35 also includes a wind speed detection component and a controller. The input end of the controller is electrically connected to the wind speed detection component, and the output end of the controller is electrically connected to the magnetizer 351. The wind speed detection component is installed on the photovoltaic panel 1. When the wind speed detection component detects that the wind speed value is greater than the preset maximum wind speed value, a power-on command is issued to the magnetizer 351 through the controller. After receiving the power-on command, the magnetizer 351 generates strong magnetism to adsorb the adsorption plate 352. In this embodiment, the preset maximum wind speed value is the critical wind speed value of static wind instability of the bracket.

[0061] like Figure 5 As shown, the eddy current energy dissipation component 34 includes an annular energy dissipation magnet 341 and an annular conductor plate 342. The annular energy dissipation magnet 341 is fixedly connected to the transmission shaft 31 through a second connecting member 343, and the annular conductor plate 342 is sleeved on the outside of the annular energy dissipation magnet 341, and an air gap is left between the annular energy dissipation magnet 341 and the annular conductor plate 342. In other embodiments, the energy dissipation magnet and the annular conductor plate 342 can also be interchanged, that is, the annular conductor plate 342 is fixedly connected to the transmission shaft 31 through the second connecting member 343, and the annular energy dissipation magnet 341 is arranged on the outside of the annular conductor plate 342. The annular energy dissipation magnet 341 can also be a permanent magnet of other materials.

[0062] In this embodiment, the annular energy-absorbing magnetic steel 341 rotates with the transmission shaft 31, and the annular energy-absorbing magnetic steel 341 and the annular conductor plate 342 generate relative motion. The annular conductor plate 342 cuts the magnetic flux lines and generates eddy current damping force. Under the action of the eddy current damping force, the rotation speed of the transmission shaft 31 becomes slower and slower, and the angle becomes smaller and smaller until it stops, thereby achieving the purpose of effectively reducing vibration of the photovoltaic panel 1 and / or the building.

[0063] In this embodiment, the rotating surface of the annular energy dissipation magnetic steel 341 of the eddy current energy dissipation component 34 is parallel to the torsional surface of the annular conductor plate 342, so that the eddy current damping force generated by the annular energy dissipation magnetic steel 341 in cooperation with the annular conductor plate 342 during the rotation of the transmission shaft 31 is always consistent with the tangent direction of the annular energy dissipation magnetic steel 341, that is, the eddy current damping force always acts vertically in the torsional motion direction of the photovoltaic panel 1, so as to always have the effect of efficiently outputting the damping force. In other embodiments, the rotating surface of the annular energy dissipation magnetic steel 341 of the eddy current energy dissipation component can also be arranged at a certain angle to the torsional surface of the annular conductor plate 342. At this time, the eddy current damping force is decomposed into the torsional motion direction of the photovoltaic panel 1 through the orthogonal decomposition of the component force, but its vibration reduction efficiency and effect are low compared with the parallel arrangement.

[0064] like Figure 3As shown, the vibration suppression system of this embodiment also includes a placement box 4 made of metal material, which is divided into an amplification component placement area 41, an energy-consuming component placement area 42 and a protection component placement area 43 in sequence. The vibration displacement amplification component 33 is placed in the amplification component placement area 41, the eddy current energy-consuming component 34 is placed in the energy-consuming component placement area 42, and the strong wind protection component 35 is placed in the protection component placement area 43, which ensures the integrated setting of each functional area and avoids the occurrence of mutual interference among the functional areas.

[0065] In this embodiment, when the photovoltaic panel 1 generates a reciprocating torsional response with the photovoltaic panel rotating beam 2 as the torsional center, the torsional response of the structure is transmitted from the force transmission member 322 to the force transmission rod 321, and the force transmission rod 321 twists synchronously with the photovoltaic panel 1. At this time, the torsional response of the photovoltaic panel 1 can be effectively transmitted to the acceleration and amplification gear assembly through the force transmission component 32, and the acceleration and amplification gear assembly amplifies the torsional response and transmits it to the eddy current energy dissipation component 34. The eddy current energy dissipation component 34 performs high-sensitivity and high-efficiency energy dissipation and vibration reduction, thereby achieving the purpose of reducing the wind vibration of the photovoltaic panel 1.

[0066] At the same time, the torsional response of the photovoltaic panel 1 is transmitted to the high wind protection component 35 through the same transmission shaft 31 of the eddy current energy dissipation component 34. When the wind speed reaches the critical wind speed of static wind instability of the bracket, the magnetic conductor 351 of the high wind protection component 35 has a magnetic attraction with the transmission shaft 31 to prevent the transmission shaft 31 from rotating, thereby improving the torsional stiffness of the overall structure, thereby avoiding the occurrence of torsional flutter and improving the safety and reliability of the photovoltaic bracket and / or building.

[0067] Figure 1 and Figure 2 An embodiment of a single-axis photovoltaic bracket of the present invention is shown. The photovoltaic bracket includes a photovoltaic panel 1, a photovoltaic panel rotating beam 2, and the vibration suppression system described in the above embodiment. The vibration suppression system has two groups of constraint protection units 3. The two groups of constraint protection units 3 are respectively arranged at the two ends of the photovoltaic panel 1 along the length direction. The two groups of constraint protection units 3 are located below the photovoltaic panel 1 and fixedly installed on the ground. Constraint protection units 3 are arranged at both ends of the photovoltaic panel 1 where the wind vibration displacement is the largest, which further improves the wind vibration restraint effect of the bracket. In other embodiments, the setting positions of the two groups of constraint protection units 3 can be any as long as they can ensure the wind vibration restraint effect of the bracket. For example, the constraint protection units 3 can also be arranged above the photovoltaic panel 1 and fixedly installed on the ground through a mounting frame.

[0068] At the same time, the force transmission component 32 of the restraint protection unit 3 is arranged parallel to the torsion plane of the photovoltaic panel 1, and the transmission shaft 31 is arranged horizontally. This allows the torsion response of the photovoltaic panel 1 to be effectively and losslessly transmitted to the vibration displacement amplification component 33 through the force transmission component 32 at the end along the width direction of the photovoltaic panel 1, thereby improving the vibration reduction effect of the single-axis photovoltaic support and / or the building.

[0069] In response to the first type of wind vibration problem in the background technology, the present invention adopts a vibration displacement amplification component 33 to amplify the torsional response and adopts an eddy current energy dissipation component 34 to provide non-contact eddy current damping. Due to the amplification of the torsional response, the eddy current energy dissipation component 34 has a small starting friction and a high sensitivity, so that the photovoltaic bracket can effectively reduce vibration even when it vibrates slightly in breezy weather, avoiding the problem that the viscous damper cannot amplify the torsional response and the large starting friction leads to poor vibration reduction effect. It improves the fatigue resistance of the bracket and avoids the risk of component fatigue fracture due to wind-induced vibration.

[0070] In response to the second type of wind vibration problem in the background technology, the eddy current damping force generated by the eddy current energy dissipation component 34 of the present invention during the rotation of the transmission shaft 31 is always consistent with the tangent direction of the eddy current energy dissipation component 34; at the same time, since the force transmission component 32 is parallel to the torsional surface of the photovoltaic panel 1, the transmission shaft 31 is horizontally arranged to connect the functional components in series, so that the eddy current damping force always acts vertically in the torsional movement direction of the bracket, and the eddy current energy dissipation component 34 always has the effect of efficiently outputting the damping force, avoiding the problem of low damping efficiency of existing energy dissipation components due to structural limitations and the method of converting the torsional response into the translational displacement of the damping component. It greatly improves the critical wind speed of the flutter of the bracket, reduces the wind vibration response, and thus effectively avoids the risk of flutter instability, ensuring the safety and stability of the bracket and / or the building.

[0071] In view of the problem of wind vibration of the third type in the background technology, the present invention provides the torsional stiffness of the bracket through the eddy current energy dissipation component 34, and further improves the torsional stiffness through the strong wind protection component 35. Specifically, the stiffness of the transmission shaft 31 added by the strong wind protection component 35 is controllable and can be eliminated, that is, during the wind vibration of the first type and the second type, the strong wind protection component 35 is in a standby state and does not affect the normal operation of the original structure; when the wind vibration of the third type occurs, the strong wind protection component 35 enters the working state and provides adsorption force, that is, the magnetic conductor 351 of the strong wind protection component 35 has a magnetic attraction with the transmission shaft 31 when the wind speed reaches the critical wind speed of the bracket for static wind instability, so as to prevent the transmission shaft 31 from rotating under the action of the magnetic attraction, thereby improving the torsional stiffness of the overall structure and avoiding the occurrence of torsional flutter. At the same time, since the combination of the strong wind protection component 35 and the eddy current energy dissipation component 34 can effectively avoid the occurrence of torsional flutter, at this time, there is no need to place the photovoltaic panel 1 in a horizontal state to reduce damage to the bracket. The photovoltaic panel 1 can still maintain the working angle of tracking the sun during the third type of wind vibration, so that it can ensure the stability and safety of the bracket and / or building during the third type of wind vibration without giving up the highest power generation efficiency.

[0072] Furthermore, the photovoltaic panel 1 is mounted on the photovoltaic panel rotating beam 2 through the connecting support plate 5; the force transmission member 322 of the force transmission assembly 32 is connected to one end of the connecting support plate 5 along the width direction. The connecting support plate 5 has a strong bearing capacity to avoid the photovoltaic panel 1 having low strength, poor bearing capacity, and the connection between the photovoltaic panel 1 and the force transmission member 322 being easily damaged.

[0073] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A single-axis photovoltaic support, comprising a photovoltaic panel and a photovoltaic panel rotating beam, and a vibration suppression system, wherein the vibration suppression system has two groups of constraint protection units, which are respectively arranged at the two ends of the photovoltaic panel along the length direction; the force transmission component of the constraint protection unit is arranged parallel to the torsion surface of the photovoltaic panel; wherein, The vibration suppression system includes a constraint protection unit, which includes a force transmission component, a vibration displacement amplification component, an eddy current energy dissipation component and a high wind protection component which are sequentially connected through a transmission shaft, the transmission shaft is arranged horizontally, and the input end of the force transmission component is connected to the two end portions of the photovoltaic bracket in the rotation direction; the high wind protection component includes a magnetic conductor arranged on the outside of the transmission shaft, and the magnetic conductor has a magnetic attraction with the transmission shaft when the wind speed reaches the critical wind speed of static wind instability of the bracket; the force transmission component includes a force transmission rod and two force transmission members, and the force transmission rod is arranged parallel to the photovoltaic bracket when no wind vibration occurs; the force transmission rod is connected to the vibration displacement amplification component through the transmission shaft The vibration displacement amplification component is an acceleration amplification gear component, which includes an input gear, an amplification gear component and an output gear that are meshed in sequence, the center lines of the input gear and the output gear coincide, the force transmission component is connected to the input gear through the transmission shaft, and the output gear is connected to the eddy current energy dissipation component through the transmission shaft; the high wind protection component also includes an adsorption plate, which is arranged on the radially outer side of the transmission shaft and is fixedly connected to the transmission shaft through a first connecting member; the magnet is arranged opposite to the adsorption plate and is located on the outer side of the adsorption plate, and the magnet generates magnetic attraction with the transmission shaft through the adsorption plate.

2. The single-axis photovoltaic bracket according to claim 1, characterized in that: The two force transmission members are symmetrically arranged between the photovoltaic support and the force transmission rod, and two ends of each force transmission member are respectively connected to one end of the force transmission rod and one end of the photovoltaic support along the width direction.

3. The single-axis photovoltaic bracket according to claim 2, characterized in that: The force transmission member is a force transmission rope, a force transmission chain or a force transmission rod; when the force transmission member is a force transmission rope or a force transmission chain, the force transmission assembly also includes two elastic members that ensure that the force transmission member is always in a balanced state, and the two elastic members are respectively arranged at both ends of the force transmission rod, and the elastic members are arranged vertically and connected between the force transmission rod and the ground.

4. The single-axis photovoltaic bracket according to any one of claims 1 to 3, characterized in that: The amplifying gear component comprises at least one primary amplifying gear component, and the amplifying gear component comprises a large-diameter accelerating gear and a small-diameter accelerating gear coaxially fixedly arranged; When the amplifying gear component is in the first stage, the small-diameter acceleration gear is meshed with the input gear, and the large-diameter acceleration gear is meshed with the output gear; the diameter ratio of the small-diameter acceleration gear to the input gear, and the diameter ratio of the output gear to the large-diameter acceleration gear are both less than 1; When the amplifying gear component has at least two stages, the large-diameter acceleration gear and the small-diameter acceleration gear of adjacent-stage amplifying gear components are meshed with each other.

5. The single-axis photovoltaic support according to claim 4, characterized in that: There are two groups of amplifying gear components, and the two groups of amplifying gear components are symmetrically arranged with the center of the input gear as the center; When there are two groups of amplifying gear components and the amplifying gear components are at least two stages, a force transmission gear component coaxially arranged with the transmission shaft is provided between the two groups of amplifying gear components, and adjacent amplifying gear components are meshed with each other through the force transmission gear component. The force transmission gear component includes a small-diameter force transmission gear and a large-diameter force transmission gear coaxially fixed, the small-diameter force transmission gear is meshed with the large-diameter acceleration gear of the amplifying gear component close to the input side, and the large-diameter force transmission gear is meshed with the small-diameter acceleration gear of the amplifying gear component close to the output side.

6. The single-axis photovoltaic support according to any one of claims 1 to 3, characterized in that: The rotating surface of the eddy current energy dissipation component is parallel to the torsion surface of the photovoltaic bracket. The eddy current energy dissipation component includes an annular energy dissipation magnet and an annular conductor plate which are mutually nested. The annular energy dissipation magnet or the annular conductor plate is fixedly connected to the transmission shaft through a second connecting member.

7. The single-axis photovoltaic support according to claim 6, characterized in that: The photovoltaic panel is installed on the photovoltaic panel rotating beam through a connecting support plate; the force transmission member of the force transmission assembly is connected to one end of the connecting support plate along the width direction.

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