Precision solar tracking system

Abstract

The present invention provides a precise solar tracking photovoltaic tracking system, including a main column, a secondary column, a driving mechanism, a bearing support and a rotor, wherein: the driving mechanism arranged at the top of the main column includes a motor, a rotating shaft, a semicircular track and a connecting rod: the rotating shaft is tilted according to the obliquity of the ecliptic and connected to the motor to obtain the torsional force provided by the motor; the semicircular track is fixed to the rotating shaft and can rotate with the rotating shaft; one end of the connecting rod is hinged to the semicircular track and can rotate along the hinge point on the semicircular track; the main shaft of the rotor is fixedly connected to the other end of the connecting rod so that the rotor moves with the connecting rod; the bearing support is movably connected to the top of the secondary column, and the main shaft passes through the bearing support and can rotate and slide axially in the bearing support. The system uses a semicircular track and a connecting rod transmission structure to simulate the movement of the earth relative to the sun, effectively realizing precise solar tracking, and the semicircular track and connecting rod structure can achieve double-stage deceleration, saving driving costs.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic trackers, and in particular to a precise solar photovoltaic tracking system. Background Art

[0002] A solar tracker is a power device that keeps the solar panel facing the sun at all times and allows the sunlight to shine vertically on the solar panel at all times. The use of a solar tracker can significantly improve the power generation efficiency of the solar photovoltaic module 530. However, the existing dual-axis photovoltaic tracker has high transmission cost and low transmission reliability; the single-axis photovoltaic tracker has low cost and high stability, but low daily accuracy and too low utilization rate of solar energy.

[0003] Chinese patent application publication number CN106712683A, published on November 15, 2016, entitled "A New Dual-Axis Photovoltaic Tracking System", discloses a new dual-axis photovoltaic tracking system, including a pair of photovoltaic tracking mechanisms and at least four steel wires; a pair of photovoltaic tracking mechanisms are separately arranged; each photovoltaic tracking mechanism includes: a support bracket, a vertical and horizontal rotary drive device, a motor 310 and an output bracket; one end of the at least four steel wires is connected to the output bracket of one photovoltaic tracking mechanism, and the other end is connected to the output bracket of another photovoltaic tracking mechanism, and at least two steel wires are connected to the left and right sides of each output bracket respectively; the photovoltaic panel is connected to each steel wire at least at one point. However, the device can still only track the sun in one direction, the sun accuracy is not high, and the utilization rate of solar energy is too low. Summary of the invention

[0004] The present invention provides a precise solar tracking photovoltaic tracking system for realizing dual-dimensional precise solar tracking of photovoltaic modules. The precise solar tracking photovoltaic tracking system comprises a main column, a secondary column, a driving mechanism, a bearing support and a rotor, wherein:

[0005] The secondary columns and the main columns are vertically arranged with intervals along the north-south direction;

[0006] The driving mechanism is arranged on the top of the main column, and includes a motor, a rotating shaft, a semicircular track and a connecting rod: the rotating shaft is inclined according to the obliquity of the ecliptic and is coaxially connected to the power output end of the motor to obtain the torsional force provided by the motor and rotate; the diameter of the semicircular track coincides with the axis of the rotating shaft, and is fixedly connected to the rotating shaft to rotate with the rotating shaft; one end of the connecting rod is hinged to the semicircular track, the hinge point is set according to the longitude and latitude of the project site, and the hinge axis is perpendicular to the rotating shaft and tangent to the semicircular track; the main shaft of the rotor is fixedly connected to the other end of the connecting rod, so that the rotor moves with the connecting rod;

[0007] The bearing support is movably connected to the top of the secondary column, and the main shaft passes through the bearing support and can rotate and move axially in the bearing support.

[0008] In a specific implementation, the driving mechanism is arranged on the top of the main column through a driving mounting seat, wherein:

[0009] The drive mounting seat is fixedly connected to the top of the main column, the rotating shaft is movably connected to the mounting holes at both ends of the drive mounting seat for rotation, and the motor is fixedly connected to the drive mounting seat.

[0010] In a specific implementation, the main column includes a top plate, a steel column and a stiffening plate, wherein:

[0011] The top plate is arranged on the top of the steel column and is closely connected to the drive mounting seat, and the stiffening plate is arranged on the top of the side wall of the steel column to reinforce the top plate.

[0012] In a specific implementation, the power output end of the motor is connected to the rotating shaft through a reducer to transmit the torsional force.

[0013] In a specific implementation, the bearing support is movably connected to the secondary column through a hinge rod, wherein:

[0014] The top end of the hinge rod is hinged to the bottom end of the bearing support and can rotate around the hinge hole relative to the bearing support. The bottom end of the hinge rod is hinged to the top of the secondary column and can pitch and rotate along the arrangement direction of the main column and the secondary column.

[0015] In a specific implementation, the main shaft is arranged in the bearing support through two semicircular plastic bearings, wherein the two semicircular plastic bearings are sleeved on the main shaft and can rotate with the main shaft in the bearing support; the main shaft can slide along the axial direction relative to the two semicircular plastic bearings.

[0016] In a specific implementation, the rotor includes a plurality of photovoltaic modules and a plurality of secondary beams, wherein:

[0017] The plurality of secondary beams are arranged at intervals along the axial direction of the main shaft, and each photovoltaic component is sequentially arranged between two adjacent secondary beams, with both side edges resting on the top of the secondary beams.

[0018] In a specific implementation, the main shaft is also provided with a limited top plate, wherein:

[0019] The limiting top plate is sleeved on the main shaft and is arranged at the rear end of the bearing support facing the incident direction of the light, and together with the secondary beam below the bearing support position, limits the sliding of the main shaft along the axial direction within a specified range.

[0020] In a specific implementation, each photovoltaic module is fixedly connected to the top of the secondary beam through a middle pressure block and a side pressure block, wherein:

[0021] The middle pressure block is arranged between two adjacent photovoltaic modules, and the side pressure blocks are arranged on the outer sides of the photovoltaic modules at both ends in a row.

[0022] In a specific implementation, the connecting rod and the secondary beam are fixedly connected to the main shaft through a U-shaped clamp and a pad.

[0023] In a specific implementation, the bottoms of the main columns and the secondary columns are both arranged on the top of the concrete pile foundation.

[0024] The precise solar tracking photovoltaic tracking system provided by the present invention comprises a main column, a secondary column, a driving mechanism, a bearing support and a rotor. The main column and the secondary column are vertically arranged along the incident direction of light. The driving mechanism is arranged on the top of the main column, and comprises a motor, a rotating shaft, a semicircular track and a connecting rod. The rotating shaft is inclined along the obliquity direction of the ecliptic. The power output end of the motor is coaxially connected to the rotating shaft to drive the rotating shaft to rotate. The diameter of the semicircular track coincides with the axis of the rotating shaft, and is fixedly connected to the rotating shaft to rotate with the rotating shaft. One end of the connecting rod is hinged to the semicircular track, and the hinge point is set according to the longitude and latitude of the project site. The hinge axis is perpendicular to the rotating shaft and tangent to the semicircular track. The main shaft of the rotor is fixedly connected to the other end of the connecting rod so that the rotor moves with the connecting rod. The bearing support is movably connected to the top of the secondary column, and the main shaft of the rotor passes through the bearing support and can rotate and move axially in the bearing support. In order to solve the defects of existing photovoltaic tracking systems such as the inability to accurately track the sun, complex structure, complex control, poor reliability and high cost, the precise solar tracking system creatively uses a single input shaft to achieve two-dimensional precise solar tracking. The semicircular track and connecting rod structure can simulate the movement of the earth relative to the sun to achieve precise solar tracking, and the semicircular track and connecting rod structure can achieve double-stage deceleration, which greatly saves driving costs. At the same time, the rotation control of the single input shaft is exquisite, and the rotation of the input shaft simulates the rotation of the earth around its axis, which is reliable and reduces control costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the specific implementation or the prior art description. Obviously, the drawings in the following description are only some specific implementations of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0026] Figure 1 is a structural schematic diagram of a precise solar photovoltaic tracking system according to a specific embodiment of the present invention;

[0027] Figure 2 is a partial schematic diagram of a main column and a driving mechanism according to a specific embodiment of the present invention;

[0028] Figure 3 is a partial schematic diagram of a rotor according to a specific embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of the connection structure between the connecting rod and the main shaft according to a specific embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of a three-dimensional structure of a semicircular track according to a specific embodiment of the present invention;

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of a bearing support and a secondary column according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the specific implementation of the present invention more clear, the specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings. Here, the schematic specific implementation of the present invention and its description are used to explain the present invention, but are not intended to limit the present invention.

[0033] like Figure 1 , Figure 2 and Figure 5 As shown, the present invention provides a precise solar tracking photovoltaic tracking system for realizing dual-dimensional precise solar tracking of a photovoltaic module 530. The precise solar tracking photovoltaic tracking system includes a main column 100, a secondary column 200, a driving mechanism 300, a bearing support 400 and a rotor 500, wherein:

[0034] The secondary columns 200 and the main columns 100 are vertically arranged with intervals along the north-south direction;

[0035] The driving mechanism 300 is arranged on the top of the main column 100, and includes a motor 310, a rotating shaft 320, a semicircular track belt 330 and a connecting rod 340: the rotating shaft 320 is tilted according to the obliquity of the ecliptic and is coaxially connected to the power output end of the motor 310 to obtain the torsional force provided by the motor 310 and rotate; the diameter of the semicircular track belt 330 coincides with the axis of the rotating shaft 320, and is fixedly connected to the rotating shaft 320 to rotate with the rotating shaft 320; one end of the connecting rod 340 is hinged to the semicircular track belt 330, and the hinge point is set according to the longitude and latitude of the project site, and the hinge axis is perpendicular to the rotating shaft 320 and tangent to the semicircular track belt 330; the main shaft 510 of the rotor 500 is fixedly connected to the other end of the connecting rod 340, so that the rotor 500 moves with the connecting rod 340;

[0036] The bearing support 400 is movably connected to the top of the secondary column 200 , and the main shaft 510 passes through the bearing support 400 and can rotate and move axially in the bearing support 400 .

[0037] The working principle of the system is as follows: when tracking the sun, the motor 310 drives the rotating shaft 320 to rotate, and the rotating shaft 320 drives the semicircular track 330 to rotate around the diameter. The connection point on the semicircular track 330 and the connecting rod 340 follows the movement of the semicircular track 330, further driving the connecting rod 340 to move according to the law of the sun's motion. The connecting rod 340 drives the main shaft 510 to move around the connection point of the bearing support 400 according to the law of the sun's motion. The main shaft 510 drives the photovoltaic assembly 530 fixed thereon to accurately track the sun; according to the movement of the earth's surface point relative to the sun, the semicircular track 330 is produced, and the movement law of the connection point on the track is the same as that of the sun. The connecting rod 340 is used to drive the rotor 500 and the main shaft 510 to operate according to the law of the sun's motion, thereby achieving completely accurate tracking of the sun and ensuring that the sun's rays are always perpendicular to the photovoltaic assembly 530, thereby maximizing the power generation efficiency and maximizing the photovoltaic power generation. In addition, since the connection point on the semicircular track 330 and the diameter of the semicircular track 330 have different linear velocities, one-stage deceleration and torque increase are achieved. The presence of the connecting rod 340 makes the rotating shaft 320 and the circumferential points of the connecting rod 340 have different linear velocities, thereby achieving two-stage deceleration and torque increase. The double-stage deceleration greatly saves the driving cost and increases the structural safety.

[0038] In specific implementation, Figure 1 , Figure 2 As shown, the connection point between the connecting rod 340 and the semicircular track 330 can be located at the offset center of the semicircular track 330, similar to the northern and southern hemispheres of the earth, so that when the semicircular track 330 rotates around the diameter, it drives the connection point to simulate the trajectory of the sun and achieve precise sun tracking.

[0039] In a specific implementation, the connection between the drive mechanism 300 and the column can be arranged in a variety of embodiments. Figure 1 , Figure 2 As shown, in order to ensure the stable connection of the driving mechanism 300 and improve the working stability of the system, the driving mechanism 300 can be set on the top of the main column 100 through the driving mounting seat 350, wherein: the driving mounting seat 350 is fixedly connected to the top of the main column 100, the rotating shaft 320 is movably connected to the mounting holes at both ends of the driving mounting seat 350 for rotation, and the motor 310 is fixedly connected to the driving mounting seat 350.

[0040] In a specific implementation, the main column 100 can be arranged in a variety of embodiments. Figure 1 , Figure 2As shown, in order to ensure the structural stability of the main column 100 and effectively support the driving mechanism 300 and the rotor 500, the main column 100 may include a top plate 120, a steel column 110 and a stiffening plate 130, wherein: the top plate 120 is arranged on the top of the steel column 110 and is closely connected to the driving mounting seat 350, and the stiffening plate 130 is arranged on the top of the side wall of the steel column 110 to reinforce the top plate 120. Furthermore, the stiffening plate 130 may also be arranged on the bottom of the side wall of the steel column 110 to enhance the supporting capacity.

[0041] In a specific implementation, there may be multiple implementations for connecting the motor 310 and the rotating shaft 320. For example, the power output end of the motor 310 may be connected to the rotating shaft 320 via a reducer to transmit the torsional force.

[0042] In a specific implementation, there are many embodiments for connecting the bearing support 400 and the secondary column 200. For example, Figure 1 As shown, the bearing support 400 can be movably connected to the secondary column 200 through a hinge rod 410, wherein: the top end of the hinge rod 410 is hinged to the bottom end of the bearing support 400, and can rotate around the hinge hole relative to the bearing support 400, and the bottom end of the hinge rod is hinged to the top of the secondary column 200, and can pitch and rotate along the arrangement direction of the main column 100 and the secondary column 200. Using the two-point one-line principle, the bearing support 400 with the hinge rod 410 at the bottom can achieve multi-dimensional rotation, thereby playing the role of a ball joint, thereby reducing processing costs while improving structural reliability.

[0043] In a specific implementation, there are many implementation schemes for the arrangement of the bearing in the bearing support 400. For example, Figure 6 As shown, the main shaft 510 is arranged in the bearing support 400 through two semicircular plastic bearings, wherein the two semicircular plastic bearings are sleeved on the main shaft 510 and can rotate with the main shaft 510 in the bearing support 400; the main shaft 510 can slide along the axis direction relative to the two semicircular plastic bearings. The arrangement of the plastic bearings can make the bearing support 400 have a self-lubricating effect, thereby effectively improving the stability of the system.

[0044] In a specific implementation, there are many implementations for disposing the photovoltaic components 530 and the secondary beam 520 on the rotor 500. For example, Figure 3 , Figure 4As shown, the rotor 500 may include a plurality of photovoltaic components 530 and a plurality of secondary beams 520, wherein: the plurality of secondary beams 520 are arranged at intervals along the axial direction of the main shaft 510, and each photovoltaic component 530 is sequentially arranged between each adjacent two secondary beams 520, with both side edges resting on the top of the secondary beams 520.

[0045] In specific implementation, Figure 1 As shown, in order to reduce the pressure of the rotor 500 on the main column 100 during the movement, the main shaft 510 can also be provided with a limit top plate 511, wherein: the limit top plate 511 can be sleeved on the main shaft 510, and is arranged at the rear end of the bearing support 400 facing the incident direction of the light, and together with the secondary beam 520 below the position of the bearing support 400, it limits the sliding of the main shaft 510 along the axial direction within a specified range. The top plate 120 can limit the relative position of the main shaft 510 and the bearing support 400 during the movement of the rotor 500, thereby effectively dispersing the pressure of the rotor 500 to the secondary column 200.

[0046] In a specific implementation, there are many embodiments for connecting the photovoltaic module 530 and the secondary beam 520. For example, Figure 3 As shown, in order to ensure a stable connection, each photovoltaic component 530 can be fixedly connected to the top of the secondary beam 520 by a middle pressure block 541 and a side pressure block 542, wherein: the middle pressure block 541 is arranged between two adjacent photovoltaic components 530, and the side pressure block 542 is arranged on the outside of the photovoltaic components 530 at both ends in a row.

[0047] In a specific implementation, there are many embodiments for connecting the connecting rod 340 and the secondary beam 520 with the main shaft 510. For example, Figure 3 , Figure 4 As shown, in order to improve the installation speed while ensuring the stability of the system, the connecting rod 340 and the secondary beam 520 can be fixedly connected to the main shaft 510 through a U-shaped clamp 610 and a pad 620.

[0048] In specific implementation, Figure 1 As shown, in order to ensure the stability of the main column 100 and the secondary column 200 , the main column 100 and the secondary column 200 can be arranged on the top of the concrete pile foundation 700 .

[0049] In summary, the precise solar tracking photovoltaic tracking system provided by the present invention includes a main column, a secondary column, a driving mechanism, a bearing support and a rotor. The main column and the secondary column are vertically arranged along the incident direction of light; the driving mechanism is arranged at the top of the main column, and includes a motor, a rotating shaft, a semicircular track and a connecting rod. The rotating shaft is inclined along the obliquity direction of the ecliptic, and the power output end of the motor is coaxially connected to the rotating shaft to drive the rotating shaft to rotate. The diameter of the semicircular track coincides with the axis of the rotating shaft, and is fixedly connected to the rotating shaft to rotate with the rotating shaft; one end of the connecting rod is hinged to the semicircular track, and the hinge point is set according to the longitude and latitude of the project site. The hinge axis is perpendicular to the rotating shaft and tangent to the semicircular track; the main shaft of the rotor is fixedly connected to the other end of the connecting rod so that the rotor moves with the connecting rod; the bearing support is movably connected to the top of the secondary column, and the main shaft of the rotor passes through the bearing support and can rotate and move axially in the bearing support. In order to solve the defects of existing photovoltaic tracking systems such as the inability to accurately track the sun, complex structure, complex control, poor reliability and high cost, the precise solar tracking system creatively uses a single input shaft to achieve two-dimensional precise solar tracking. The semicircular track and connecting rod structure can simulate the movement of the earth relative to the sun to achieve precise solar tracking, and the semicircular track and connecting rod structure can achieve double-stage deceleration, which greatly saves driving costs. At the same time, the rotation control of the single input shaft is exquisite, and the rotation of the input shaft simulates the rotation of the earth around its axis, which is reliable and reduces control costs.

[0050] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A precise solar photovoltaic tracking system, characterized in that: The precise solar photovoltaic tracking system comprises a main column (100), a secondary column (200), a driving mechanism (300), a bearing support (400) and a rotor (500), wherein: The secondary columns (200) and the main columns (100) are vertically arranged with intervals along the north-south direction; The driving mechanism (300) is arranged on the top of the main column (100), and comprises a motor (310), a rotating shaft (320), a semicircular track belt (330) and a connecting rod (340): the rotating shaft (320) is arranged to be inclined according to the obliquity of the ecliptic and is coaxially connected to the power output end of the motor (310) to obtain the torsional force provided by the motor (310) and rotate; the diameter of the semicircular track belt (330) coincides with the axis of the rotating shaft (320), and is fixed The connecting rod (340) is fixedly connected to the rotating shaft (320) so as to rotate with the rotating shaft (320); one end of the connecting rod (340) is hinged to the semicircular track belt (330), the hinge point is set according to the longitude and latitude of the project site, and the hinge axis is perpendicular to the rotating shaft (320) and tangent to the semicircular track belt (330); the main shaft (510) of the rotor (500) is fixedly connected to the other end of the connecting rod (340), so that the rotor (500) moves with the connecting rod (340); The bearing support (400) is movably connected to the top of the secondary column (200), and the main shaft (510) passes through the bearing support (400) and can rotate and move axially in the bearing support (400); The main column (100) comprises a top plate (120), a steel column (110) and a stiffening plate (130), wherein: The top plate (120) is arranged on the top of the steel column (110) and is closely connected to the drive mounting seat (350), and the stiffening plate (130) is arranged on the top of the side wall of the steel column (110) to reinforce the top plate (120); The connection point between the connecting rod (340) and the semicircular track (330) is located at the offset center of the semicircular track (330), so that when the semicircular track (330) rotates around the diameter, the connection point is driven to simulate the trajectory of the sun, thereby achieving accurate sun tracking.

2. The precise solar photovoltaic tracking system according to claim 1, characterized in that: The driving mechanism (300) is arranged on the top of the main column (100) via a driving mounting seat (350), wherein: The drive mounting seat (350) is fixedly connected to the top of the main column (100), the rotating shaft (320) is movably connected to the mounting holes at both ends of the drive mounting seat (350) for rotation, and the motor (310) is fixedly connected to the drive mounting seat (350).

3. The precise solar photovoltaic tracking system according to claim 1, characterized in that: in, The power output end of the motor (310) is connected to the rotating shaft (320) via a reducer to transmit torsional force.

4. The precise solar photovoltaic tracking system according to claim 1, characterized in that: The bearing support (400) is movably connected to the secondary column (200) via a hinge rod (410), wherein: The top end of the hinge rod (410) is hinged to the bottom end of the bearing support (400) and can rotate around the hinge hole relative to the bearing support (400); the bottom end of the hinge rod (410) is hinged to the top of the secondary column (200) and can pitch and rotate along the arrangement direction of the main column (100) and the secondary column (200).

5. The precise solar photovoltaic tracking system according to claim 4, characterized in that: The main shaft (510) is arranged in the bearing support (400) through two semicircular plastic bearings, wherein the two semicircular plastic bearings are sleeved on the main shaft (510) and can rotate with the main shaft (510) in the bearing support (400); the main shaft (510) can slide relative to the two semicircular plastic bearings along the axial direction.

6. The precise solar photovoltaic tracking system according to claim 1, characterized in that: The rotor (500) comprises a plurality of photovoltaic modules (530) and a plurality of secondary beams (520), wherein: The plurality of secondary beams (520) are arranged at intervals along the axial direction of the main axis (510), and each photovoltaic module (530) is sequentially arranged between two adjacent secondary beams (520), with both side edges resting on the top of the secondary beams (520).

7. The precise solar photovoltaic tracking system according to claim 6, characterized in that: in, The main shaft (510) is also provided with a limited top plate (511), wherein: The limiting top plate (511) is sleeved on the main shaft (510), and is arranged at the rear end of the bearing support (400) facing the incident direction of the light, and together with the secondary beam (520) below the bearing support (400), limits the sliding of the main shaft (510) along the axial direction within a specified range.

8. The precise solar photovoltaic tracking system according to claim 6, characterized in that: Each photovoltaic assembly (530) is fixedly connected to the top of the secondary beam (520) via a middle pressure block (541) and a side pressure block (542), wherein: The middle pressure block (541) is arranged between two adjacent photovoltaic modules (530), and the side pressure blocks (542) are arranged on the outsides of the photovoltaic modules (530) at both ends in a row.

9. The precise solar photovoltaic tracking system according to claim 6, characterized in that: in, The connecting rod (340) and the secondary beam (520) are fixedly connected to the main shaft (510) via a U-shaped clamp (610) and a pad (620).

10. The precise solar photovoltaic tracking system according to claim 1, characterized in that: in, The main column (100) and the secondary column (200) are both arranged on the top of the concrete pile foundation (700).

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