A wind tunnel aeroelastic test device for flexible photovoltaic supports

Abstract

The utility model discloses a kind of wind tunnel aerodynamic elastic test devices of flexible photovoltaic support, belong to photovoltaic support wind resistance test technical field, including two parallelly arranged ground beams, the ground beam upside is all along its length direction and is provided with first sliding slot, at least one slide is slidably arranged in the first sliding slot, fixedly arranged with stand on the slide, the stand is vertically provided with second sliding slot, at least one cable adjustment group is slidably arranged in the second sliding slot, and the adjusting end of cable adjustment group on the stand on the slide in the corresponding position of two ground beams is connected by cable. The beneficial effects of the present application are as follows: the two side ground beams can be installed with multiple stands, and multiple cable adjustment groups can also be installed on each stand. The structure is simple, easy to install and disassemble. It can be adjusted arbitrarily and is suitable for testing systems and structural parameters of various flexible photovoltaic supports, reducing the cost of testing.

Description

Technical Field

[0001] This utility model relates to the field of wind resistance testing technology for photovoltaic brackets, specifically to a wind tunnel aeroelastic testing device for flexible photovoltaic brackets. Background Technology

[0002] Photovoltaic (PV) mounting systems are components designed to support and fix PV modules in a photovoltaic (PV) power generation system, and are an indispensable part of the system. PV mounting systems include traditional rigid mounting systems and flexible PV mounting systems.

[0003] Flexible photovoltaic (PV) support structures, including single-layer and multi-layer suspension structures, support PV modules and form the structural component of the PV system. Furthermore, by adjusting the height and span of the support structure, terrain limitations can be overcome, making it suitable for areas such as mountains, fishponds, and tidal flats where traditional rigid supports are difficult to cover.

[0004] Flexible photovoltaic (PV) supports require wind tunnel testing to ensure that parameters such as aeroelasticity, cable tension, and wind-induced vibration meet the requirements. However, existing testing equipment is not universally applicable. The tilt angle of the components and the height of the cable truss of flexible PV supports cannot be adjusted. Therefore, different flexible PV support structures require separate design of testing equipment, resulting in poor applicability and high testing costs. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is: how to improve the versatility of the flexible photovoltaic support test device and reduce the test cost.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a wind tunnel aeroelastic testing device for a flexible photovoltaic support, comprising two parallel ground beams, each ground beam having a first sliding groove along its length on its upper side, at least one sliding seat slidably disposed in the first sliding groove, a column fixedly disposed on the sliding seat, a second sliding groove vertically disposed on the column, at least one cable adjustment group slidably disposed in the second sliding groove, and the adjustment ends of the cable adjustment groups at corresponding positions on the columns of the sliding seats on the two ground beams are connected by cables.

[0007] The advantages of this scheme are: multiple columns can be installed on the two side ground beams, and multiple cable adjustment groups can be installed on each column. The structure is simple and easy to install and disassemble; it can be adjusted arbitrarily and is suitable for various test systems and structural parameters of flexible photovoltaic supports, thus reducing test costs.

[0008] Preferably, the cable adjustment assembly includes a first slider and a second slider slidably disposed in the second slide groove. The first slider is provided with a pulley, and the second slider is provided with an adjustment knob assembly. The two ends of the cable pass over the pulleys at corresponding positions and are connected to the adjustment knob assembly at corresponding positions. The tension of the cable can be adjusted by adjusting the knob assembly.

[0009] The advantages of adopting the above preferred solution are: the pulley is used to change the direction of the cable, the adjusting knob assembly is used to adjust the tension of the cable, the relative distance between the pulley and the adjusting knob assembly is adjustable, and different monitoring devices can be added between the two to increase applicability.

[0010] Preferably, the adjustment knob assembly includes a worm gear and a worm shaft rotatably mounted on the second slider, the worm gear and the worm shaft meshing with each other, wherein the worm shaft is connected to the second slider via a U-shaped seat, and a handle is fixedly provided at one end of the worm shaft; the worm gear is connected to the second slider via a rotating shaft, and a winding post is coaxially provided at one end of the rotating shaft, and the end of the cable is connected to the winding post.

[0011] The advantages of adopting the above-mentioned preferred scheme are: the tension of the cable is controlled by the worm gear and worm, and the worm gear is prevented from slipping and rotating on its own by the friction torque. The structure is simple and the adjustment is convenient.

[0012] Preferably, it also includes a force sensor, and each end of the force sensor is provided with a connector, and the end of each connector away from the force sensor is fixed with a one-way steel cable lock head;

[0013] The cable is connected to one of the one-way lock heads of the steel cable, and the other one-way lock head of the steel cable is connected to the winding post through an adjusting cable. One end of the adjusting cable is connected to the one-way lock head of the steel cable, and the other end is fixedly connected to the winding post.

[0014] The advantages of adopting the above-mentioned preferred solution are: the force sensor monitors the tension on both sides in real time, which can help adjust the tension of the adjusting cable by adjusting the knob assembly, and at the same time monitor the influence of wind on the cable.

[0015] Preferably, the slide block, the first slider, and the second slider are all provided with locking components.

[0016] The advantages of adopting the above preferred solution are: it facilitates the fixing of the slide block, the first slider and the second slider, and prevents them from loosening. Attached Figure Description

[0017] Appendix Figure 1 This is a schematic diagram of the ground beam of this utility model;

[0018] Appendix Figure 2 This is a schematic diagram of the column of this utility model;

[0019] Appendix Figure 3 This is a schematic diagram of the cable adjustment assembly of this utility model.

[0020] Appendix Figure 4 This is a schematic diagram of the adjustment knob assembly of this utility model;

[0021] Appendix Figure 5 This is a three-dimensional schematic diagram of the column of this utility model;

[0022] Appendix Figure 6 This is a schematic diagram of the single-layer cable structure flexible photovoltaic support of this utility model;

[0023] Appendix Figure 7 This is a schematic diagram of the flexible photovoltaic support with a (three-cable) spatial cable structure of this utility model;

[0024] Appendix Figure 8 This is a schematic diagram of a flexible photovoltaic support for a single cable truss according to the present invention;

[0025] Appendix Figure 9 This is a schematic diagram of the flexible photovoltaic support with a (four-cable) spatial cable structure of this utility model;

[0026] Appendix Figure 10 This is a schematic diagram of the parallel cable truss supported flexible photovoltaic bracket of this utility model.

[0027] Explanation of reference numerals in the attached drawings: 1. Ground beam; 2. First slide rail; 3. Slide block; 4. Column; 5. Second slide rail; 6. Cable; 7. First slider; 8. Second slider; 9. Pulley; 10. Adjustment knob assembly; 11. Force sensor; 12. Connector; 13. One-way lock head for steel cable; 14. Adjustment cable; 15. Photovoltaic panel; 16. Support frame;

[0028] 101. Worm gear; 102. Worm; 103. Handle; 104. Winding post; 105. U-shaped seat; 106. Shaft. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0030] Example 1

[0031] like Figures 1 to 2 As shown, a wind tunnel aeroelastic testing device for a flexible photovoltaic support includes two parallel ground beams 1. Each ground beam 1 has a first groove 2 along its length on its upper side. At least one slide seat 3 is slidably disposed in the first groove 2. A column 4 is fixedly disposed on the slide seat 3. A second groove 5 is vertically opened on the column 4. At least one cable adjustment group is slidably disposed in the second groove 5. The adjustment ends of the corresponding cable adjustment groups on the columns 4 of the slide seats 3 at corresponding positions on the two ground beams 1 are connected by cables 6.

[0032] In this embodiment, the device is mainly used to test various flexible photovoltaic supports with different systems and structures in a wind tunnel test chamber, and to test data such as wind speed, displacement of the flexible photovoltaic support, tension of the cable, and aeroelasticity.

[0033] Specifically, the two ground beams 1 are fixed to the floor of the wind tunnel test chamber. Multiple columns 4 can be installed on both ground beams 1. The columns 4 are vertically set and parallel to each other. Multiple cable adjustment groups can also be installed on each column 4 from top to bottom. The corresponding cable adjustment groups on both sides are connected by cables 6. Therefore, multiple cables 6 can be connected to form a flexible photovoltaic support. The length direction of the cables 6 is perpendicular to the wind direction. Several photovoltaic panels 15 are placed on the cables 6 to simulate a real outdoor scene. The wind tunnel is started to test the displacement of the flexible photovoltaic support, the tension of the cables 6, and the aeroelasticity data.

[0034] Specifically, a force sensor is installed on cable 6 to collect tension data, a cobra probe is installed upstream of the wind tunnel aeroelastic test device of the flexible photovoltaic support to collect the incoming wind speed, and a visual displacement analyzer (VDA) is installed at the top of the wind tunnel to collect displacement data of the flexible photovoltaic support, and finally, the relevant parameters of various flexible photovoltaic supports are obtained.

[0035] Example 2

[0036] like Figure 3 and Figure 5 As shown, based on Embodiment 1, the cable adjustment assembly includes a first slider 7 and a second slider 8 slidably disposed in the second slide groove 5. The first slider 7 is provided with a pulley 9, and the second slider 8 is provided with an adjustment knob assembly 10. The two ends of the cable 6 pass over the pulleys 9 at corresponding positions and are connected to the adjustment knob assembly 10 at corresponding positions. The tension of the cable 6 can be adjusted by adjusting the knob assembly 10.

[0037] In this embodiment, the cable adjustment assembly can be as follows: Figure 3As shown, pulley 9 is installed in the high position, adjustment knob assembly 10 is installed in the low position, one end of cable 6 is fixed to the adjustment knob assembly 10 of the current column 4, and then the other end is pulled upward around pulley 9 to change direction and then pulled to the column 4 on the other side, and then around pulley 9 on the other side to change direction and then fixed to the adjustment knob assembly 10 on the other side.

[0038] In addition, such as Figure 5 As shown, the pulleys 9 and the adjustment knob assembly 10 on the two side columns 4 can be installed on the side of the two side ground beams 1 where the columns 4 are close to each other, or on the side of the two side columns 4 where they are far apart.

[0039] The cable adjustment group can also be like Figure 5 As shown, place pulley 9 in the low position and adjustment knob assembly 10 in the high position. Fix one end of cable 6 to the adjustment knob assembly 10 of the current column 4, and then the other end goes down around pulley 9 to change direction and is pulled to the column 4 on the other side. Then, after going around pulley 9 on the other side to change direction, it is fixed to the adjustment knob assembly 10 on the other side.

[0040] Figure 5 The three installation methods can be selected as needed to form cables with different tension effects, thus creating flexible photovoltaic brackets with different structures.

[0041] As a parallel technical solution in this embodiment, the cable adjustment group can also be: a second slider 8 slidably disposed in the second slide groove 5, an adjustment knob assembly 10 disposed on the second slider 8, and the two ends of the cable 6 being connected to the adjustment knob assembly 10 at corresponding positions of the two side columns 4, so that the tension of the cable 6 can be adjusted by adjusting the knob assembly 10.

[0042] As a parallel technical solution in this embodiment, the cable adjustment group can also be: a second slider 8 slidably disposed in the second slide groove 5, a winding shaft rotatably disposed on the second slider 8, and the two ends of the cable 6 being connected to the winding shafts at corresponding positions of the two side columns 4, so that the tension of the cable 6 can be adjusted by rotating the winding shaft.

[0043] like Figure 1 and Figure 2 As shown, locking components are provided on the slide block 3, the first slider 7, and the second slider 8.

[0044] In this embodiment, the locking component includes a threaded through hole and a screw. The slide block 3, the first slider 7 and the second slider 8 are all provided with threaded through holes. When the slide block 3, the first slider 7 and the second slider 8 slide to a predetermined position, the screw is screwed into the threaded through hole. The bottom end of the screw extends out of the threaded through hole and abuts against the inner wall of the first slide groove 2 or the second slide groove 5, and is fixed by friction.

[0045] As a parallel technical solution in this embodiment, the locking component can also be a pin and a pin hole. A plurality of pin through holes are provided on the outer side walls of the first slide groove 2 and the second slide groove 5 along the length direction. The other end of the pin through hole is connected to the inner side of the first slide groove 2 and the second slide groove 5. The side walls of the slide block 3, the first slider 7 and the second slider 8 are all provided with corresponding limiting holes. When the slide block 3, the first slider 7 and the second slider 8 slide to the predetermined position, a pin is inserted into the pin through hole, and the other end of the pin extends into the limiting hole to limit and fix the slide block 3, the first slider 7 and the second slider 8.

[0046] Example 3

[0047] like Figure 4 As shown, based on embodiments 1-2, the adjustment knob assembly 10 includes a worm gear 101 and a worm 102 rotatably mounted on the second slider 8. The worm gear 101 and the worm 102 mesh with each other. The worm 102 is connected to the second slider 8 through a U-shaped seat 105, and a handle 103 is fixedly provided at one end of the worm 102. The worm gear 101 is connected to the second slider 8 through a rotating shaft 106. A winding post 104 is coaxially provided at one end of the rotating shaft 106, and the end of the cable 6 is connected to the winding post 104.

[0048] In this embodiment, the worm gear 102 is rotatably mounted between the two side walls of the U-shaped seat 105, the U-shaped seat 105 is fixedly mounted on the second slider 8, and the worm wheel 101 rotates on the second slider 8 through the rotating shaft 106. One end of the rotating shaft 106 passes through the second slider 8 and is fixedly provided with a winding post 104.

[0049] By rotating the worm 102, the worm 102 drives the worm wheel 101 to rotate, and the worm wheel 101 drives the winding post 104 to rotate. The winding post 104 winds up or releases the cable 6 to adjust the tension of the cable 6. The frictional torque between the worm wheel 101 and the worm 102 can prevent the worm wheel 101 from slipping and rotating on its own.

[0050] As a parallel technical solution in this embodiment, the adjustment knob assembly 10 can also be: the end of the cable 6 is wound and fixed on the threaded post that is threadedly installed on the second slider 8; the cable 6 can be wound or unwound by turning the threaded post in the forward or reverse direction, thereby adjusting the tension.

[0051] Example 4

[0052] like Figure 3 As shown, based on embodiments 1-3, a force sensor 11 is also included. Connectors 12 are respectively provided at both ends of the force sensor 11, and a steel cable one-way lock head 13 is fixedly provided at the end of the connector 12 away from the force sensor 11.

[0053] The cable 6 is connected to one of the one-way cable lock heads 13, and the other one-way cable lock head 13 is connected to the winding post 104 via the adjusting cable 14. One end of the adjusting cable 14 is connected to the one-way cable lock head 13, and the other end is fixedly connected to the winding post 104.

[0054] In this embodiment, the cable 6 is not directly connected to the adjustment knob assembly 10. A force sensor 11 is provided between the adjustment knob assembly 10 and the cable 6. Connectors 12 are provided at both ends of the force sensor 11 to connect the force sensor 11 and the one-way lock head 13 of the steel cable. One side of the one-way lock head 13 of the steel cable is connected to the cable 6, and the other side of the one-way lock head 13 of the steel cable is connected to the adjustment cable 14. The other end of the adjustment cable 14 is fixedly connected to the winding post 104.

[0055] The one-way locking head 13 for steel cables is existing technology. For example, an adjustable one-way locking device for steel wire ropes is disclosed in utility model patent CN209892693U.

[0056] In this embodiment, as Figure 3 As shown, one end of the cable 6 is inserted into the one-way lock head 13 of the cable. The cable 6 is not restricted when sliding in the direction of the force sensor 11, but it is restricted by the one-way lock head 13 when pulled out in the direction away from the force sensor 11 to achieve locking. The other end of the cable 6 is connected to the one-way lock head 13 of the cable on the column 4 of the opposite ground beam 1 after passing through the pulley 9.

[0057] One end of the adjusting cable 14 is inserted into the one-way lock head 13 of the steel cable. The adjusting cable 14 is unrestricted when sliding in the direction of the force sensor 11, but it is restricted by the one-way lock head 13 when pulled out in the direction away from the force sensor 11 to achieve locking. The other end of the adjusting cable 14 is fixedly connected to the winding post 104.

[0058] When the winding post 104 is rotated, the winding post 104 pulls the adjusting cable 14 to move away from the force sensor 11. Since the adjusting cable 14 is locked by the one-way lock head 13 of the steel cable, the adjusting cable 14 will pull the force sensor 11. At the same time, the force will also be applied to the cable 6 on the other side of the force sensor 11 to adjust the tension of the cable 6. At this time, the force sensor 11 monitors the tension values ​​on both sides.

[0059] During the test, when the wind blows the cable 6, the force sensor 11 can also monitor the tension value of the cable 6 in real time.

[0060] Specific experimental content:

[0061] Because flexible photovoltaic supports have a variety of different structures to cope with different environments and wind conditions, the cables 6 of this device can be arbitrarily assembled into different flexible photovoltaic supports for testing, making it highly applicable.

[0062] Flexible photovoltaic support structure one: such as Figure 6 As shown, four columns 4 are required, each column 4 is equipped with a cable adjustment group, the four cable adjustment groups are paired up to form two cables 6, both ends of the two cables 6 are connected to the top of the column 4, and the two ends of the photovoltaic panel 15 are attached to the two cables 6 to form a "single-layer cable structure flexible photovoltaic support" for testing.

[0063] By changing the relative distance between the two ground beams 1, it is possible to fix the aeroelastic model of flexible photovoltaic support with different spans and test the tension of cable 6; by changing the height of the cable adjustment group, it is possible to fix the flexible photovoltaic support with different heights and test the tension of cable 6; by adjusting the relative distance between the two columns 4 on the same side or the relative height of the cable adjustment group on the two columns 4 on the same side, different tilt angles of photovoltaic panel 15 can be changed.

[0064] Flexible photovoltaic support structure two: such as Figure 7 As shown, six columns 4 are required, each column 4 is equipped with a cable adjustment group, and the six cable adjustment groups are paired up to form three cables 6. The cables 6 on both sides are the same as those in the first flexible photovoltaic support structure, and the cable 6 in the middle is lower in height. The three cables 6 are connected by a support frame 16. The photovoltaic panels 15 are attached to the two uppermost cables 6 at both ends to form a "flexible photovoltaic support based on (three-cable) spatial cable structure" for testing.

[0065] Flexible photovoltaic support structure three; such as Figure 8 As shown, six columns 4 are required. One cable adjustment group is installed on the two columns 4 on both sides, and two cable adjustment groups are installed on the middle column 4. The eight cable adjustment groups are paired up to form four cables 6. The cables 6 on both sides are set up in the same way as the first flexible photovoltaic support structure. One of the two cables 6 in the middle is connected to the top of the column 4 at both ends, and the other cable 6 is connected to the bottom of the column 4 at both ends, forming a reverse bow structure. The four cables 6 are connected by a support frame 16. The photovoltaic panel 15 is attached to the two uppermost cables 6 at both ends to form a "flexible photovoltaic support with a single cable truss" for testing.

[0066] Flexible photovoltaic support structure four; such as Figure 3 and Figure 9 As shown, four columns 4 are required, each column 4 is equipped with two cable adjustment groups, and the eight cable adjustment groups are paired up to form four cables 6. Both ends of the four cables 6 are connected to the top of the column 4, and the four cables 6 are connected to each other by a support frame 16. The two ends of the photovoltaic panel 15 are attached to the two uppermost cables 6 to form a "flexible photovoltaic support based on (four-cable) spatial cable structure" for testing.

[0067] Flexible photovoltaic support structure five; such as Figure 5 and Figure 10As shown, four columns 4 are required, each column 4 is equipped with three cable adjustment groups, and the twelve cable adjustment groups are paired up to form six cables 6. The four cables 6 located at the top of the column 4 are the same as those in the flexible photovoltaic support structure 4. The remaining two cables 6 are connected to the bottom of the column 4 at both ends. The six cables 6 are connected to each other by a support frame 16. The photovoltaic panels 15 are attached to the two uppermost cables 6 at both ends to form a "parallel cable truss supporting flexible photovoltaic support" for testing.

[0068] In different flexible photovoltaic support structures, the shape of the support frame 16 can be adaptively adjusted according to the number of cables 6 to be connected, and can be triangular, rectangular or polygonal.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A wind tunnel aeroelastic testing device for a flexible photovoltaic support, characterized in that, It includes two parallel ground beams (1), each ground beam (1) has a first groove (2) along its length on its upper side, at least one slide seat (3) is slidably arranged in the first groove (2), a column (4) is fixedly arranged on the slide seat (3), a second groove (5) is vertically opened on the column (4), at least one cable adjustment group is slidably arranged in the second groove (5), and the adjustment ends of the cable adjustment groups on the corresponding positions of the slide seats (3) and the corresponding positions of the columns (4) on the two ground beams (1) are connected by cables (6).

2. The wind tunnel aeroelastic testing device for a flexible photovoltaic support according to claim 1, characterized in that, The cable adjustment assembly includes a first slider (7) and a second slider (8) slidably disposed in the second slide groove (5). The first slider (7) is provided with a pulley (9), and the second slider (8) is provided with an adjustment knob assembly (10). The two ends of the cable (6) pass over the pulleys (9) at corresponding positions and are connected to the adjustment knob assembly (10) at corresponding positions. The tension of the cable (6) can be adjusted by adjusting the knob assembly (10).

3. The wind tunnel aeroelastic testing device for a flexible photovoltaic support according to claim 2, characterized in that, The adjustment knob assembly (10) includes a worm gear (101) and a worm (102) rotatably mounted on the second slider (8). The worm gear (101) and the worm (102) mesh with each other. The worm (102) is connected to the second slider (8) through a U-shaped seat (105). A handle (103) is fixedly provided at one end of the worm (102). The worm gear (101) is rotatably connected to the second slider (8) through a rotating shaft (106). A winding post (104) is coaxially provided at one end of the rotating shaft (106). The end of the cable (6) is connected to the winding post (104).

4. The wind tunnel aeroelastic testing device for a flexible photovoltaic support according to claim 3, characterized in that, It also includes a force sensor (11), with connectors (12) provided at both ends of the force sensor (11), and a steel cable one-way lock head (13) fixedly provided at the end of the connector (12) away from the force sensor (11). The cable (6) is connected to one of the one-way lock heads (13) of the cable, and the other one-way lock head (13) of the cable is connected to the winding post (104) through the adjusting cable (14). One end of the adjusting cable (14) is connected to the one-way lock head (13) of the cable, and the other end is fixedly connected to the winding post (104).

5. A wind tunnel aeroelastic testing device for a flexible photovoltaic support according to any one of claims 2 to 4, characterized in that, Locking components are provided on the slide block (3), the first slider (7), and the second slider (8).

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