Flat single-axis linkage tracking array type photovoltaic power station

Abstract

The utility model provides a flat single shaft linkage tracking array type photovoltaic power station, which belongs to the technical field of photovoltaic power generation, and comprises a plurality of rows of photovoltaic units following light along the east-west direction, a driving mechanism, a swing flat shaft and a swing arm, each row of photovoltaic unit comprises a cross rod and a plurality of photovoltaic panels installed on the cross rod, and the cross rod is arranged along the north-south direction; a plurality of stand columns are arranged in the length direction of the transverse rod at intervals, and the transverse rod is rotationally connected with the stand columns through photovoltaic bearings. The driving mechanism comprises a driving motor and a reduction gear set in transmission connection with a main shaft of the driving motor; the swing flat shaft is eccentrically connected to the reduction gear set, is perpendicular to the cross rod in the east-west direction and is located below the cross rod; the upper end of the swing arm is connected to the middle of the cross rod, and the lower end is rotationally connected to the swing flat shaft; the driving motor drives the swing flat shaft to reciprocate in the east-west direction through the reduction gear set, and the swing arm drives the transverse rod to rotate in a reciprocating mode through the swing flat shaft so that the photovoltaic panel can follow light in the east-west direction.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic power generation technology, specifically relating to a single-axis linkage tracking array photovoltaic power station. Background Technology

[0002] Solar photovoltaic (PV) power generation is one of the most important forms of solar energy utilization. The power generation efficiency of PV panels is affected by the angle of direct sunlight. To improve the power generation and economic benefits of PV power plants, tracking solar PV power generation systems are now widely used. Tracking brackets ensure that the PV panels receive the most sunlight within a certain range of rotation, thereby improving the power generation efficiency of the PV panels.

[0003] Currently, each single-axis tracking bracket requires a drive mechanism to achieve the purpose of tracking sunlight onto the photovoltaic panels. For array photovoltaic panels deployed in open areas such as vast deserts and plateaus, these single-axis tracking brackets not only require more drive mechanisms, but also have poor wind resistance. When the wind speed in the field is too high, the single-axis tracking bracket may twist and tilt, causing the photovoltaic panels supported on it to tilt as well, thus preventing them from receiving sunlight as well and affecting the power generation efficiency. Utility Model Content

[0004] This utility model provides a flat single-axis linkage tracking array photovoltaic power station, which aims to solve the problems of poor wind resistance of single-axis tracking brackets and high cost due to multiple drive mechanism configurations.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A single-axis linkage tracking array photovoltaic power station is provided, comprising: multiple rows of photovoltaic units tracking light in an east-west direction, a drive mechanism, a swinging horizontal axis, and a swing arm. Each row of photovoltaic units includes a crossbar and several photovoltaic panels mounted on the crossbar, which is arranged in a north-south direction. Several columns are spaced apart along the length of the crossbar, and the crossbar is rotatably connected to the columns via photovoltaic bearings. The drive mechanism is located between any two rows of photovoltaic units and includes a drive motor and a drive motor main shaft. A reduction gear set is connected by a transmission; a swinging horizontal shaft is eccentrically connected to the reduction gear set, the swinging horizontal shaft is arranged perpendicular to the crossbar in the east-west direction and is located below the crossbar; the number of swing arms is the same as the number of rows of photovoltaic units, and they correspond one-to-one; the upper end of the swing arm is connected to the middle position of the crossbar, and the lower end is rotatably connected to the swinging horizontal shaft; the drive motor drives the swinging horizontal shaft to reciprocate along the east-west direction through the reduction gear set, and the swing arm drives the crossbar to reciprocate through the swinging horizontal shaft, so that the photovoltaic panel chases the light from east to west.

[0006] In one possible implementation, the reduction gear set includes a gearbox, a drive gear disposed within the gearbox, and a sector gear meshing with the drive gear; the gearbox is connected to the housing of the drive motor, and the gearbox has a downward opening to prevent the reciprocating oscillation of the sector gear; the drive gear is connected to the main shaft of the drive motor via a coupling; the oscillating horizontal shaft is eccentrically connected to the sector gear via an eccentric shaft, and the oscillating horizontal shaft is rotatably connected to the sector gear.

[0007] In one possible implementation, a first steel plate is symmetrically arranged on the swinging flat shaft, and a first ear plate is provided on the first steel plate. A first through hole through which the eccentric shaft passes is provided on the first ear plate. Limiting nuts are respectively provided at both ends of the eccentric shaft to connect the swinging flat shaft with the sector gear. A locking pin is also provided on the limiting nut and the eccentric shaft. A second through hole is provided on the sector gear along its axial direction, and a protective sleeve is provided in the second through hole. The eccentric shaft is rotatably connected to the protective sleeve.

[0008] In one possible implementation, the crossbar is a rectangular steel bar, and the upper end of the swing arm is connected to the crossbar via a connector; the connector includes a lower connecting flange adapted to the lower half of the crossbar and an upper connecting flange covering the upper half of the crossbar, and the upper connecting flange and the lower connecting flange are bolted together to wrap around the crossbar and realize the connection between the crossbar and the swing arm.

[0009] In one possible embodiment, the photovoltaic bearing includes a lower bearing housing, a lower bearing inner sleeve rotatably adapted within the lower bearing housing, an upper bearing housing, and an upper bearing inner sleeve rotatably adapted within the upper bearing housing; the lower bearing housing is fixed to the upper end of the column, and the lower bearing inner sleeve wraps around the lower half of the crossbar; the upper bearing inner sleeve wraps around the upper half of the crossbar and circumferentially engages with the lower bearing inner sleeve; the upper bearing housing and the lower bearing housing are circumferentially engaged and fastened together by bolts.

[0010] In one possible implementation, the crossbar comprises several segments, with adjacent segments of the crossbar being fixedly connected together by a third steel plate and bolts.

[0011] In one possible implementation, the swinging horizontal shaft comprises several segments, with two adjacent segments of the swinging horizontal shaft being rotatably connected to the swing arm at the swing arm via a second lug on a second steel plate.

[0012] In one possible implementation, photovoltaic brackets are fixed at intervals or adjacent to each other on the crossbar, and the photovoltaic panels are fixed to the photovoltaic brackets.

[0013] In one possible implementation, the photovoltaic support includes two parallel support rods perpendicular to the crossbar.

[0014] The single-axis linkage tracking array photovoltaic power station provided by this utility model has the following advantages compared with the prior art:

[0015] Firstly, regarding the sun-tracking effect, this invention uses a drive motor to drive a swinging horizontal shaft to swing back and forth in the east-west direction. This, in turn, causes the swing arms connected to each horizontal bar to swing in the east-west direction, ensuring that multiple rows of photovoltaic panels synchronously track the sun in the east-west direction. Through the connection between the swing arms and the swinging horizontal shaft, and the precise transmission of the drive motor and reduction gear set, the photovoltaic panels can accurately adjust their angle according to the sun's movement trajectory, maximizing the reception of direct sunlight, improving the overall power generation efficiency of the photovoltaic power station, and enhancing its economic benefits.

[0016] Secondly, regarding wind resistance, this invention reduces the number of driving components in the overall structure by using a shared drive mechanism for multiple rows of photovoltaic units, resulting in a more compact and simple structure. Compared to the traditional approach where each single-axis tracking bracket is equipped with a drive mechanism, this design reduces weak points in the structure and improves overall stability. Moreover, due to the optimized overall structure, this compact structure can better resist the impact of wind when facing strong winds, reducing torsional tilting caused by wind, thereby ensuring that the photovoltaic panels can continuously and stably receive sunlight and maintain high power generation efficiency.

[0017] Furthermore, in terms of cost, reducing the number of drive mechanisms directly lowers equipment procurement and subsequent maintenance costs. Simultaneously, this linked tracking design makes the overall layout of the photovoltaic power station more organized, reducing unnecessary space occupation. In large-scale photovoltaic power station construction, this effectively saves land resources and indirectly reduces construction costs. Attached Figure Description

[0018] Figure 1 A top view of the single-axis linkage tracking array photovoltaic power station provided in this embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the structure of a single-axis linkage tracking array photovoltaic power station along the swinging horizontal axis provided in this embodiment of the utility model. Figure 1 (Demonstrating the connection between the swing axis and the swing arm, with the photovoltaic panel in a horizontal position);

[0020] Figure 3 A schematic diagram of the structure of a single-axis linkage tracking array photovoltaic power station along the swinging horizontal axis provided in this embodiment of the utility model. Figure 1(Demonstrating the connection between the swing axis and the swing arm, with the photovoltaic panel chasing the sun westward);

[0021] Figure 4 Structural schematic diagrams of the crossbar, column, and swing arm provided for embodiments of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the photovoltaic bearing used in the embodiments of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the drive motor and reduction gear set provided in an embodiment of the present utility model;

[0024] Figure 7 A schematic diagram of the structure of a single-axis linkage tracking array photovoltaic power station along the swinging horizontal axis provided in this embodiment of the utility model. Figure 2 (Demonstrating the connection between the swing axis and the swing arm, with the photovoltaic panel in a horizontal position);

[0025] Figure 8 A schematic diagram of the structure of a single-axis linkage tracking array photovoltaic power station along the swinging horizontal axis provided in this embodiment of the utility model. Figure 2 (Demonstrating the connection between the swing axis and the swing arm, with the photovoltaic panel chasing the sun westward);

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Crossbar; 2. Photovoltaic panel; 3. Connector; 31. Upper connecting flange; 32. Lower connecting flange; 4. Swing arm; 5. Swinging horizontal shaft; 6. Reduction gear set; 61. Gearbox; 62. Drive gear; 63. Sector gear; 7. Drive motor; 8. Photovoltaic bearing; 81. Upper bearing seat; 82. Upper bearing inner sleeve; 821. Limiting protrusion; 83. Lower bearing seat; 84. Lower bearing inner sleeve; 85. Pin; 9. Photovoltaic bracket; 10. Column; 11. First steel plate; 12. Eccentric shaft; 13. Second steel plate; 14. Base; 15. Motor base; 16. Third steel plate; 17. Electric push rod. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] Please refer to the following: Figures 1 to 8The present invention provides a single-axis linkage tracking array photovoltaic power station. The single-axis linkage tracking array photovoltaic power station includes: multiple rows of photovoltaic units tracking light in an east-west direction, a drive mechanism, a swinging horizontal axis 5, and a swing arm 4. Each row of photovoltaic units includes a horizontal bar 1 and several photovoltaic panels 2 mounted on the horizontal bar 1. The horizontal bar 1 is arranged in a north-south direction. Several columns 10 are spaced apart along the length of the horizontal bar 1, and the horizontal bar 1 is rotatably connected to the columns 10 via photovoltaic bearings 8. The drive mechanism is located between any two rows of photovoltaic units and includes a drive motor 7 and a drive shaft connected to the drive motor 7. The reduction gear set 6; the swing flat shaft 5 is eccentrically connected to the reduction gear set 6, the swing flat shaft 5 is arranged perpendicular to the crossbar 1 in the east-west direction and is located below the crossbar 1; the number of swing arms 4 is the same as the number of rows of photovoltaic units, and they correspond one-to-one; the upper end of the swing arm 4 is connected to the middle position of the crossbar 1, and the lower end is rotatably connected to the swing flat shaft 5; the drive motor 7 drives the swing flat shaft 5 to reciprocate in the east-west direction through the reduction gear set 6, and the swing arm 4 drives the crossbar 1 to reciprocate through the swing flat shaft 5, so that the photovoltaic panel 2 chases the light to the east and west.

[0030] The single-axis linkage tracking array photovoltaic power station provided by this utility model has the following advantages compared with the prior art:

[0031] Firstly, regarding the sun-tracking effect, this invention uses a drive motor 7 to drive the swinging horizontal shaft 5 to swing back and forth in the east-west direction. This, in turn, drives the swing arms 4 connected to each horizontal bar 1 to swing in the east-west direction, ensuring that multiple rows of photovoltaic panels 2 synchronously perform east-west sun-tracking actions. Through the connection between the swing arms 4 and the swinging horizontal shaft 5, and the precise transmission of the drive motor 7 and the reduction gear set 6, the photovoltaic panels 2 can accurately adjust their angle according to the sun's movement trajectory, maximizing the reception of direct sunlight, improving the overall power generation efficiency of the photovoltaic power station, and enhancing its economic benefits.

[0032] Secondly, regarding wind resistance, this invention reduces the number of driving components in the overall structure by using a shared drive mechanism for multiple rows of photovoltaic units, resulting in a more compact and simple structure. Compared to the traditional approach where each single-axis tracking bracket is equipped with a drive mechanism, this design reduces weak points in the structure and improves overall stability. Moreover, due to the optimized overall structure, this compact structure can better resist the impact of wind when facing strong winds, reducing torsional tilting caused by wind, thereby ensuring that the photovoltaic panel 2 can continuously and stably receive sunlight and maintain high power generation efficiency.

[0033] Furthermore, in terms of cost, reducing the number of drive mechanisms directly lowers equipment procurement and subsequent maintenance costs. Simultaneously, this linked tracking design makes the overall layout of the photovoltaic power station more organized, reducing unnecessary space occupation. In large-scale photovoltaic power station construction, this effectively saves land resources and indirectly reduces construction costs.

[0034] The photovoltaic units in this embodiment that track light in the east-west direction are arranged in an array. This array can be a 10×10 array, a 20×10 array, or a 30×60 array. For example, the number of rows of horizontal bars 1 can be 10, with 10 photovoltaic panels 2 installed on each row of horizontal bars 1 to form a 10×10 array. These will not be listed one by one here.

[0035] The base 14 is made of cement on the ground, the motor base 15 is fixed on the base 14, and the drive motor 7 is installed on the motor base 15. Figure 2 and Figure 3 In the middle, 'a' represents the ground boundary line.

[0036] Figure 2 This is a schematic diagram of the photovoltaic panel 2 when it is adjusted to a horizontal position. At this time, the swing axis 5 is closest to the ground. Figure 3 The diagram illustrates how the drive motor 7 rotates the drive gear 62 and the sector gear 63, causing the swing shaft 5 to move eastward, which in turn causes the swing arm 4 to swing eastward, resulting in the photovoltaic panel 2 chasing the sunlight westward; the diagram of the photovoltaic panel 2 chasing the sunlight eastward is similar to... Figure 3 On the contrary, Figure 3 The diagram shows the rotational direction arrows of the drive gear 62 and the sector gear 63, and also indicates the upward movement of the oscillating horizontal shaft 5.

[0037] In some embodiments, see Figure 2 and Figure 3 , Figure 6 As shown, the reduction gear set 6 includes a gearbox 61, a drive gear 62 disposed in the gearbox 61, and a sector gear 63 meshing with the drive gear 62; the gearbox 61 is connected to the housing of the drive motor 7, and the gearbox 61 has a downward opening to avoid the reciprocating oscillation of the sector gear 63; the drive gear 62 is connected to the main shaft of the drive motor 7 through a coupling; the oscillating flat shaft 5 is eccentrically connected to the sector gear 63 through an eccentric shaft 12, and the oscillating flat shaft 5 is rotatably connected to the sector gear 63.

[0038] Since this application uses a drive motor 7 to drive the arrayed photovoltaic panels 2 to swing synchronously to track the light through a swinging flat shaft 5, it requires not only a large torque but also good self-locking performance. The reduction gear set 6 can provide not only a large torque but also good self-locking performance, thus ensuring reliable support for the tracking angle of the photovoltaic panel 2 at a certain moment of swing. In the design of the reduction gear set 6, the gearbox 61 is connected to the housing of the drive motor 7 and has a downward opening. This design facilitates the meshing transmission between the internal drive gear 62 and the sector gear 63, and avoids the reciprocating swing of the sector gear 63, ensuring the stable operation of the entire drive mechanism.

[0039] In some embodiments, see Figure 2 and Figure 3 A first steel plate 11 is symmetrically arranged on the swing flat shaft 5. A first ear plate is arranged on the first steel plate 11. A first through hole through which the eccentric shaft 12 passes is provided on the first ear plate. Limit nuts are respectively provided at both ends of the eccentric shaft 12 so that the swing flat shaft 5 can be connected to the sector gear 63. A locking pin (not shown in the figure) is also provided on the limit nut and the eccentric shaft 12. A second through hole is provided on the sector gear 63 along its axial direction. A protective sleeve is provided in the second through hole. The eccentric shaft 12 is rotatably connected to the protective sleeve. The oscillating flat shaft 5 and the sector gear 63 are eccentrically connected via an eccentric shaft 12, and limit nuts and locking pins are set at both ends of the eccentric shaft 12 to ensure the reliability of the connection between the oscillating flat shaft 5 and the sector gear 63. The multi-row photovoltaic units that track the light along the east-west direction are designed with protective sleeves on the sector gear 63 to ensure the reliability of the connection between the oscillating flat shaft 5 and the sector gear 63 and the flexibility of rotation, so that the entire tracking action can be accurately realized. At the same time, it avoids the problem of wear of the sector gear 63 caused by direct contact and friction between the eccentric shaft 12 and the sector gear 63. With the protective sleeve, the eccentric shaft 12 rubs directly against the protective sleeve, and the protective sleeve is easy to replace after damage, and the replacement cost is low.

[0040] Optionally, see Figure 7 and Figure 8Below the swing axis 5, there are two electric push rods 17 for supporting the swing axis 5. The two electric push rods 17 are symmetrically arranged on both sides of the drive motor 7. The telescopic rods of the two electric push rods 17 are hinged to the swing axis 5, and the seats of the two electric push rods 17 are hinged to the base 14. When the swing axis 5 swings in the east-west direction, the four hinge points of the two electric push rods 17 are connected in sequence to form a parallelogram structure to support the swing axis 5 in real time. Because the power of all the crossbars 1 is transmitted through the swinging flat shaft 5, when the photovoltaic panel 2 is adjusted to a certain angle, the swinging flat shaft 5 spans multiple rows of crossbars 1 longitudinally, and because the swinging flat shaft 5 is relatively long and has a certain weight, the weight of the swinging flat shaft 5 increases the load-bearing capacity of the swinging arm 4 and the sector gear 63 through the pulling force of the swinging flat shaft 4 and the sector gear 63. The two electric push rods 17 below the swinging flat shaft 5 share the weight of the swinging flat shaft 5. When the swinging flat shaft 5 swings in the east-west direction, the four hinge points are connected in sequence to form a parallelogram structure. This structure can support the swinging flat shaft 5 in real time, ensuring the stability of the swinging flat shaft 5 during the movement, and further ensuring the accuracy of the photovoltaic panel 2's light-tracking action.

[0041] When the photovoltaic panel 2 is in a horizontal position, the telescopic rod of the electric push rod 17 retracts to its shortest position. At this time, the distance between the crossbar 1 and the ground is the shortest. When the crossbar 1 swings east-west with the drive motor 7, the crossbar 1 moves upward with the swing of the sector gear 63, the distance between the crossbar 1 and the ground increases, the electric push rod 17 tilts, and the telescopic rods extend.

[0042] In some embodiments, see Figures 2 to 4 The crossbar 1 is made of rectangular steel, and the upper end of the swing arm 4 is connected to the crossbar 1 via a connector 3. The connector 3 includes a lower connecting flange 32 that fits the lower half of the crossbar 1 and an upper connecting flange 31 that covers the upper half of the crossbar 1. The upper connecting flange 31 and the lower connecting flange 32 are bolted together to enclose the crossbar 1 and connect the crossbar 1 to the swing arm 4. Specifically, the upper connecting flange 31 and the lower connecting flange 32 form a rectangular hole that fits the crossbar 1, so that the crossbar 1 can be driven to rotate under the action of the swing arm 4, thereby achieving east-west tilting of the photovoltaic panel 2 to track the light.

[0043] The connection between the crossbar 1 and the swing arm 4 is achieved through a specially designed connector 3, including a lower connecting flange 32 that fits the lower half of the crossbar 1 and an upper connecting flange 31 that covers the upper half of the crossbar 1, and is connected by bolts. This connection method is firm and reliable, and can effectively transmit the power of the swing arm 4 to achieve stable rotation of the crossbar 1.

[0044] In some embodiments, see Figure 4 and Figure 5The photovoltaic bearing 8 includes a lower bearing seat 83, a lower bearing inner sleeve 84 rotatably adapted to the lower bearing seat 83, an upper bearing seat 81, and an upper bearing inner sleeve 82 rotatably adapted to the upper bearing seat 81; the lower bearing seat 83 is fixed to the upper end of the column 10, and the lower bearing inner sleeve 84 wraps around the lower half of the crossbar 1; the upper bearing inner sleeve 82 wraps around the upper half of the crossbar 1 and is circumferentially connected to the lower bearing inner sleeve 84; the upper bearing seat 81 and the lower bearing seat 83 are circumferentially connected and fastened together by bolts.

[0045] The design of the photovoltaic bearing 8 also fully considers the rotational adaptation relationship between the crossbar 1 and the column 10. The cooperation of the lower bearing seat 83, the lower bearing inner sleeve 84, the upper bearing seat 81, and the upper bearing inner sleeve 82, with the upper bearing inner sleeve 82 and the lower bearing inner sleeve 84 mating to form a rectangular hole to enclose the crossbar 1, allows the crossbar 1 to be supported by the column 10 and rotatably connected to the column 10, realizing the rotation with the swing arm 4. This ensures both the rotational flexibility of the crossbar 1 and the stability of the structure.

[0046] Optionally, a limiting protrusion 821 is provided on the interface of the upper bearing inner sleeve 82, and a limiting groove adapted to the limiting protrusion 821 is provided on the interface of the lower bearing inner sleeve 84, so as to limit the position of the two.

[0047] The upper bearing housing 81 and the lower bearing housing 83 are connected together on one side by a pin 85 and on the other side by bolts.

[0048] In some embodiments, see Figure 4 The crossbar 1 consists of several segments, and two adjacent crossbar segments 1 are fixedly connected together by a third steel plate 16 and bolts.

[0049] In some embodiments, see Figure 2 and Figure 3 The swing horizontal shaft 5 comprises several segments. Two adjacent segments of the swing horizontal shaft 5 are rotatably connected to the swing arm 4 via a second ear plate on the second steel plate 13 at the swing arm 4. The method of connecting the crossbar 1 and the swing horizontal shaft 5 in several segments facilitates transportation and on-site installation, and the reliable connection is achieved through the corresponding steel plate and ear plate structure, ensuring the integrity of the entire structure.

[0050] In some embodiments, see Figure 2 and Figure 3 Photovoltaic brackets 9 are fixed at intervals or adjacent to each other on the crossbar 1, and photovoltaic panels 2 are fixed on the photovoltaic brackets 9. The photovoltaic brackets 9 on the crossbar 1 are designed with two parallel support rods perpendicular to the crossbar 1, which provides stable support for the photovoltaic panels 2 and ensures the stability of the photovoltaic panels 2 during the tracking process.

[0051] In some embodiments, the photovoltaic bracket 9 includes two parallel support rods, which are perpendicular to the crossbar 1 (not shown in the figure).

[0052] In summary, this utility model has significant advantages in improving power generation efficiency, reducing costs, and enhancing wind resistance.

[0053] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flat single-axis ganged tracking arrayed photovoltaic power plant, characterized in that, The utility model relates to a kind of photovoltaic tracking system, comprising: Multiple rows of photovoltaic units along east-west direction, each row of photovoltaic units includes crossbar (1) and several photovoltaic panels (2) mounted on the crossbar (1), the crossbar (1) is arranged along north-south direction;Several vertical columns (10) are arranged at intervals along the length direction of the crossbar (1), and the crossbar (1) is rotatably connected to the vertical column (10) by photovoltaic bearing (8); Drive mechanism is arranged between any two rows of photovoltaic units, including drive motor (7) and speed reduction gear set (6) connected with the main shaft of drive motor (7); Swing flat shaft (5) is eccentrically connected to the speed reduction gear set (6), the swing flat shaft (5) is arranged along east-west direction perpendicular to the crossbar (1), and is located below the crossbar (1);And Swing arm (4) is same as the number of rows of photovoltaic units, and one-to-one correspondence;The upper end of swing arm (4) is connected to the middle position of crossbar (1), and the lower end is rotatably connected to swing flat shaft (5);Drive motor (7) drives swing flat shaft (5) reciprocating motion along east-west direction through speed reduction gear set (6), and swing arm (4) drives crossbar (1) reciprocating rotation by swing flat shaft (5), so that photovoltaic panel (2) tracks light to east and west.

2. The flat single-axis tracking array photovoltaic power plant of claim 1, wherein, The speed reduction gear set (6) includes gear box (61), driving gear (62) arranged in the gear box (61) and sector gear (63) engaged with the driving gear (62);The gear box (61) is connected with the shell of drive motor (7), and the gear box (61) has downward open mouth to avoid the reciprocating swing of sector gear (63);The driving gear (62) is connected to the main shaft of drive motor (7) by shaft coupling;Swing flat shaft (5) is eccentrically connected to sector gear (63) by eccentric shaft (12), and swing flat shaft (5) is rotatably connected with sector gear (63).

3. The flat single-axis tracking array photovoltaic power plant of claim 2, wherein, Symmetrical first steel plate (11) is arranged on swing flat shaft (5), first ear plate is arranged on the first steel plate (11), and first through hole is arranged on the first ear plate for eccentric shaft (12) to pass through;Limiting nut is arranged at both ends of eccentric shaft (12) respectively, so that swing flat shaft (5) is connected with sector gear (63), locking pin is further arranged on the limiting nut and passes through the limiting nut and eccentric shaft (12);Second through hole is arranged along the axis direction of sector gear (63), and sheath is arranged in the second through hole, and eccentric shaft (12) is rotatably connected with the sheath.

4. The flat single-axis tracking array photovoltaic power plant of claim 1, wherein, The horizontal rod (1) is rectangular steel, the upper end of the swing arm (4) is connected with the horizontal rod (1) through the connecting piece (3); the connecting piece (3) comprises a lower connecting flange (32) adapted to the lower half of the horizontal rod (1) and an upper connecting flange (31) wrapped on the upper half of the horizontal rod (1), the upper connecting flange (31) and the lower connecting flange (32) are wrapped around the horizontal rod (1) and realize the connection of the horizontal rod (1) and the swing arm (4) through bolts.

5. The flat single-axis tracking array photovoltaic power plant of claim 1, wherein, The photovoltaic bearing (8) comprises a lower bearing seat (83), a lower bearing inner sleeve (84) rotationally fitted in the lower bearing seat (83), an upper bearing seat (81) and an upper bearing inner sleeve (82) rotationally fitted in the upper bearing seat (81); the lower bearing seat (83) is fixed to the upper end of the column (10), the lower bearing inner sleeve (84) is wrapped around the lower half of the horizontal rod (1); the upper bearing inner sleeve (82) is wrapped around the upper half of the horizontal rod (1) and is in circumferential abutment with the lower bearing inner sleeve (84); the upper bearing seat (81) is in circumferential abutment with the lower bearing seat (83) and is fastened together through bolts.

6. The flat single-axis tracking array photovoltaic power plant of claim 1, wherein, The horizontal rod (1) comprises several segments, and adjacent two segments of the horizontal rod (1) are fixedly connected together through the third steel plate (16) and bolts.

7. The flat single-axis tracking array photovoltaic power plant of claim 1, wherein, The swing flat shaft (5) comprises several segments, and adjacent two segments of the swing flat shaft (5) are rotationally connected with the swing arm (4) through the second lug plate on the second steel plate (13) at the swing arm (4).

8. The flat single-axis tracking array photovoltaic power plant of claim 1, wherein, The photovoltaic support (9) is fixed on the horizontal rod (1) at intervals or next to each other, and the photovoltaic panel (2) is fixed on the photovoltaic support (9).

9. The flat single-axis tracking array photovoltaic power plant of claim 8, wherein, The photovoltaic support (9) comprises two parallel support rods, and the support rods are perpendicular to the horizontal rod (1). The photovoltaic support (9) comprises two parallel support rods, and the support rods are perpendicular to the horizontal rod (1).

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