Eccentricity compensation device, bearing seat and photovoltaic support

Abstract

The invention provides an eccentric compensation device, a bearing seat and a photovoltaic support, relates to the technical field of photovoltaic supports, and aims to solve the problems of serious torsion and large angle deviation caused by single-point driving of a main beam of a single-row tracking support. The eccentric compensation device comprises a shell, two arc-shaped springs, a connecting piece and a hoop, mounting points are arranged at the two ends of the shell and connected with the first ends of the arc-shaped springs, the second ends of the two arc-shaped springs are connected with the connecting piece, and the connecting piece is fixed to the main beam through the hoop. When the main beam rotates, the connecting piece is driven to enable the arc-shaped spring to deform, and reverse counterforce is generated to restrain torsion. The eccentric compensation device is installed on the bearing seat, and an installation part is arranged on the outer side of the bearing seat and used for being connected with the eccentric compensation device. The photovoltaic support drives the main beam to rotate through the driving mechanism, and the eccentric compensation device is installed on a bearing seat of the non-driving stand column. The device can restrain the torsion of the main beam in real time, is adaptive to different operation speeds, is flexible in installation, is low in cost, and can effectively improve the structural safety and stability of the photovoltaic support.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic support technology, specifically to an eccentricity compensation device, a bearing seat, and a photovoltaic support. Background Technology

[0002] Photovoltaic tracking brackets are the core device of solar photovoltaic power generation systems. They sense the sun's position through photosensitive elements, and the control system drives the drive mechanism to automatically rotate the photovoltaic main beam and photovoltaic modules in sync with the sun's movement. This ensures that the photovoltaic modules are always precisely aligned with the sun, maximizing the reception of solar radiation energy. The structure mainly consists of drive columns, non-drive columns, main beams, bearing seats, and purlins. The photovoltaic modules are fixed to the main beam via the purlins.

[0003] For single-row tracking brackets, to reduce drive costs, multiple main beams are often fixedly connected to form a long main beam, and the entire beam rotates through a single-point drive. However, during operation, the long main beam is prone to eccentricity due to factors such as uneven weight distribution, photovoltaic module load deviation, transmission clearance, and external gusts of wind. This means that the actual rotation trajectory of the main beam deviates from the preset concentric circular arc trajectory, resulting in an increased relative positional deviation between the end and the drive point. This eccentricity not only reduces the light-receiving accuracy of the photovoltaic modules but also exacerbates local stress concentration on the main beam, which may lead to structural deformation or fatigue damage over long-term operation.

[0004] To address the aforementioned problems, existing technologies mainly offer two solutions: one uses springs to provide vertical support, but this only alleviates end sagging caused by the torsion of the main beam and cannot compensate for eccentric offsets in the horizontal or rotational directions; the other uses viscous dampers, whose core function is to slow down the rotational speed of the main beam through damping force to prevent overshoot, but they cannot actively provide compensating force to bring the main beam back to its preset trajectory, thus failing to solve the "difficulty in returning to position" problem caused by eccentric offsets. Therefore, there is an urgent need for a solution that can actively provide directional compensating force to bring the main beam back to its preset trajectory when eccentric offsets occur. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, the purpose of this invention is to provide an eccentricity compensation device, bearing housing, and photovoltaic support to reduce the torsion of the main beam and the angular deviation between the end and the drive point, thereby improving structural safety and stability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An eccentricity compensation device, comprising:

[0008] The casing has one mounting point at each end;

[0009] Two curved springs are configured; the first end of each curved spring is connected to a different mounting point.

[0010] The connector is placed between two mounting points and is parallel to the photovoltaic main beam; one end of the connector is connected to the second end of two arc springs, and the other end is connected to the clamp.

[0011] When the photovoltaic main beam rotates relative to the shell, the arc spring is deformed through the connecting parts, and the arc spring provides a counterforce in the torsional direction for the photovoltaic main beam.

[0012] Preferably, the housing has an internal mounting groove for mounting an arc-shaped spring; the mounting groove has a circular arc shape in cross-section.

[0013] Preferably, the mounting point is a bolt; a cover plate is provided on one side of the housing, and the cover plate is installed on the housing by bolts; both the first and second ends of the arc spring are provided with connecting rings; the connecting ring at the first end of the arc spring is hung on the bolt, and the connecting ring at the second end is hung on the connector; the connector is a bolt, a long threaded rod, or a rod-shaped structure with cotter pins at both ends.

[0014] Preferably, the housing is provided with an arc-shaped hole, the axis of the arc-shaped hole and the axis of the mounting groove are collinear; the arc-shaped hole extends along the axial direction of the mounting groove and passes through the cover plate; the connector is provided through the arc-shaped hole.

[0015] Preferably, the mounting groove is provided with a POM wear-resistant washer for protecting the arc spring.

[0016] A bearing housing for mounting an eccentric compensation device, wherein the outer side of the bearing housing is provided with a mounting part that connects to the mounting point, the mounting part being an ear plate with lug holes or an independent L-shaped adapter.

[0017] Preferably, two eccentric compensation devices are configured, and the two eccentric compensation devices are symmetrically arranged on both sides of the bearing housing.

[0018] Preferably, the housing and the bearing seat are integrally formed.

[0019] Preferably, the bearing housing is provided with a guide arc hole, and the connector is movably provided through the guide arc hole.

[0020] A photovoltaic support structure includes a bearing housing, a drive column, a non-drive column, a main beam bearing, purlins, and a drive mechanism; the main beam bearing is installed in the bearing housing; the photovoltaic main beam passes through the bearing; the purlins are installed on the photovoltaic main beam; the bearing housing is fixed to the non-drive column; and the drive mechanism is installed on the drive column for driving the photovoltaic main beam to rotate.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] The device is rigidly connected to the photovoltaic main beam via clamps. When the main beam shifts eccentrically due to its own weight, load deviation, or gusts of wind, the connector shifts synchronously with the main beam, causing two arc-shaped springs inside the housing to undergo directional deformation within the arc-shaped mounting groove—one spring stretches while the other compresses. The elastic restoring force of the arc-shaped springs forms a directional compensating force opposite to the direction of the shift, which acts directly on the main beam through the connectors and clamps, actively pushing the main beam back to its preset trajectory. This fundamentally solves the problem of existing technologies being unable to correct eccentric shifts, ensuring that the photovoltaic modules are always aligned with the sun and improving the accuracy of light reception.

[0023] The deformation of the arc spring is linearly related to the eccentricity of the main beam. Whenever the main beam shifts, the spring will generate a corresponding compensating force in real time. The compensating force increases with the increase of the shift and decreases synchronously with the decrease of the shift. This "dynamic following" characteristic ensures that a stable compensating force is always provided during the momentary shift of the main beam during low-speed rotation, medium-speed operation, or when disturbed by gusts of wind, avoiding continuous deviation of the trajectory and significantly reducing the structural stress concentration caused by long-term eccentricity of the main beam.

[0024] The device allows for precise adjustment of the compensation force by replacing the curved springs with different stiffnesses: high-stiffness springs can be used for long main beams, while low-stiffness springs can be used for short main beams or light load scenarios. Simultaneously, two eccentric compensation devices can be symmetrically installed on both sides of the bearing housing to balance the forces on both sides of the main beam, avoiding secondary offset caused by unilateral compensation, and adapting to photovoltaic support systems with different spans and loads.

[0025] The POM wear-resistant washer inside the housing directly contacts the arc-shaped spring, reducing frictional loss during spring deformation and extending its service life. The arc-shaped spring is attached to the mounting point and connector via a connecting ring, making disassembly and replacement convenient. Springs can be replaced individually based on their wear level without requiring complete disassembly of the main beam or bearing housing. The core components of the device are conventional metal parts, without complex electrical or hydraulic components, resulting in low manufacturing costs and high long-term operational stability, ensuring the continuous effectiveness of the eccentricity compensation function.

[0026] The arc-shaped holes on the shell and cover plate, in conjunction with the connectors, not only provide motion guidance for the connectors, but also, when the main beam deviates beyond its range due to extreme conditions such as strong winds, the rigid contact between the connectors and the walls of the arc-shaped holes forces the main beam to continue to deviate, preventing excessive deformation of the arc springs or damage to the main beam structure due to excessive eccentricity, thus providing dual protection for the system. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0028] Figure 2 This is a three-dimensional structural diagram of Embodiment 1 of the present invention;

[0029] Figure 3This is an exploded view of the structure of Embodiment 1 of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0031] Figure 5 This is an exploded view of the structure of Embodiment 2 of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0033] Figure 7 This is an exploded view of the structure of Embodiment 3 of the present invention;

[0034] Figure 8 This is a schematic diagram of the structure of Embodiment 4 of the present invention;

[0035] Figure 9 This is an exploded view of the structure of Embodiment 4 of the present invention;

[0036] Figure 10 This is a schematic diagram of the structure from another perspective of Embodiment 4 of the present invention.

[0037] Figure 11 This is a schematic diagram of the structure when the end cap of Embodiment 4 of the present invention is opened.

[0038] in:

[0039] 1. Bearing housing; 2. Non-drive column; 3. Main beam bearing; 4. Clamp; 41. Lower clamp; 42. Upper clamp; 43. Connecting plate; 44. Left clamp; 45. Right clamp; 46. Connecting block; 5. Photovoltaic main beam; 6. Eccentricity compensation device; 61. Mounting point; 62. Cover plate; 63. Arc hole; 64. Connector; 65. Arc spring; 66. Housing; 67. Connecting ring; 68. Mounting groove; 69. L-shaped adapter; 610. Ear plate; 7. End cap; 8. Outer shell; 9. Fixing component; 10. Flow channel; 11. Liquid filling port; 12. Sealing screw; 13. Blocking component; 14. Inner shell. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] An eccentricity compensation device, comprising:

[0042] The housing 66 has a mounting point 61 at each end;

[0043] Two curved springs 65 are configured; the first ends of the two curved springs 65 are respectively connected to two mounting points 61;

[0044] The connector 64 is placed between two mounting points 61 and is parallel to the photovoltaic main beam 5; one end of the connector 64 is connected to the second end of two arc springs 65, and the other end is connected to the clamp 4;

[0045] When the photovoltaic main beam 5 rotates relative to the shell 66, the arc spring 65 is deformed through the connector 64, and the arc spring 65 provides a reaction force in the torsional direction for the photovoltaic main beam 5.

[0046] Furthermore, the housing 66 has an internal mounting groove 68 for mounting the arc spring 65; the cross-sectional shape of the mounting groove 68 is arc-shaped.

[0047] Furthermore, mounting point 61 is set as a bolt, and the housing 66 is provided with a circular hole for mounting the bolt; the bolt passes through the circular hole and extends to the outside of the housing 66 at both ends; a cover plate 62 is provided on one side of the housing 66, and the cover plate 62 is installed on the housing 66 by the bolt at mounting point 61; both the first and second ends of the arc spring 65 are provided with connecting rings 67; the connecting ring 67 at the first end of the arc spring 65 is hung on the bolt at mounting point 61, and the connecting ring 67 at the second end is hung on the connector 64; the connector 64 is a bolt, a long threaded rod, or a rod-shaped structure with cotter pins at both ends.

[0048] Furthermore, the housing 66 is provided with an arc-shaped hole 63, the axis of which is collinear with the axis of the mounting groove 68; the arc-shaped hole 63 extends along the axial direction of the mounting groove 68 and passes through the cover plate 62; the connector 64 is provided through the arc-shaped hole 63. When the photovoltaic main beam 5 rotates to its limit position, the connector 64 abuts against the wall of the arc-shaped hole 63, preventing the photovoltaic main beam 5 from continuing to rotate, which can play a role in wind protection, especially in windy environments.

[0049] Furthermore, the interior of the mounting slot 68 is provided with a POM wear-resistant washer for protecting the arc spring 65.

[0050] Furthermore, POM wear-resistant spacers are provided on both sides of the housing 66. The POM wear-resistant spacers are fitted onto the connector 64. When the connector 64 slides in the arc-shaped hole 63, it makes frictional contact with the housing 66 and the cover plate 62 through the POM wear-resistant spacers, thereby reducing component wear.

[0051] A bearing housing for mounting an eccentric compensation device 6 is provided on the outer side of the bearing housing 1, which is connected to a mounting point 61. The mounting part is either a lug plate 610 with a lug hole or an independent L-shaped adapter 69. One end of the bolt of the mounting point 61 is mounted on the mounting part, thereby fixing the eccentric compensation device 6 to the bearing housing. The bearing housing 1 is integrally formed or is composed of upper and lower structures.

[0052] Furthermore, two eccentric compensation devices 6 are configured, symmetrically arranged on both sides of the bearing housing 1. The mounting points 61 of the two eccentric compensation devices 6 are provided with independent bolts to be connected to the mounting parts of the bearing housing 1, or they can be fixed to the bearing housing 1 by sharing a long bolt.

[0053] Furthermore, the housing 66 is integrally formed with the bearing seat 1.

[0054] Furthermore, the bearing housing 1 is provided with a guide arc hole, and the connecting piece 64 is movably provided through the guide arc hole.

[0055] A photovoltaic support includes a bearing housing 1, a drive column, a non-drive column 2, a main beam bearing 3, purlins, and a drive mechanism; the main beam bearing 3 is installed in the bearing housing 1; the photovoltaic main beam 5 passes through the bearing; the purlins are installed on the photovoltaic main beam 5; the bearing housing 1 is fixed on the non-drive column 2; the drive mechanism is installed on the drive column and is used to drive the photovoltaic main beam 5 to rotate.

[0056] Example 1

[0057] like Figures 1 to 3 As shown, an eccentricity compensation device includes:

[0058] The housing 66 has a mounting point 61 at each end, and the mounting point 61 is a bolt; the housing 66 has a mounting groove 68 inside; the mounting groove 68 has a circular arc shape in cross section; a cover plate 62 is provided on one side of the housing 66, and the cover plate 62 has a circular hole corresponding to the bolt. The bolt passes through the circular hole and fixes the cover plate 62 to the housing 66, thus closing the mounting groove 68.

[0059] Two curved springs 65 are configured; the curved springs 65 are set in the mounting groove 68; the first end and the second end of the curved springs 65 are both provided with connecting rings 67; the first ends of the two curved springs 65 are respectively connected to two mounting points 61;

[0060] The connector 64 is positioned in the middle between the two mounting points 61 and is parallel to the photovoltaic main beam 5. Two arc-shaped springs 65 are symmetrically arranged on both sides of the connector 64. One end of the connector 64 is connected to the second end of the two arc-shaped springs 65, and the other end is fixedly connected to the clamp 4, which is fixed to the photovoltaic main beam 5. The connector 64 is a long screw. An arc-shaped hole 63 is provided on the housing 66, and the axis of the arc-shaped hole 63 is collinear with the axis of the mounting groove 68. The arc-shaped hole 63 extends along the axis of the mounting groove 68 and passes through the cover plate 62. The connector 64 is installed through the arc-shaped hole 63. The connecting ring 67 at the first end of the arc-shaped spring 65 is hung on the bolt, and the connecting ring 67 at the second end is hung on the connector 64.

[0061] In this embodiment, two eccentric compensation devices 6 are configured, symmetrically arranged on both sides of the bearing housing 1; the housing 66 is integrally formed with the bearing housing 1; the bearing housing 1 is provided with guide arc holes corresponding to the arc holes 63, and a long screw is movably disposed in the guide arc holes; the two ends of the long screw pass through the arc holes 63 of the two eccentric compensation devices 6 respectively and extend to the outside of the eccentric compensation devices 6; the clamp 4 is located on the side of the eccentric compensation device 6 away from the bearing housing 1; the clamp 4 includes an upper clamp 42 and a lower clamp 41; the upper clamp 42 and the lower clamp 41 are fastened together. The photovoltaic main beam 5 is fixedly connected to the main beam by bolts; a connecting plate 43 is integrally provided on the lower bracket 41, and a round hole adapted to the long screw is provided on the connecting plate 43. The long screw passes through the round hole, and the clamp 4 is installed on the side of the bearing seat 1 by a nut; the bearing seat 1 is fixed on the non-drive column 2; when the photovoltaic main beam 5 rotates relative to the shell 66, the long screw compresses / stretches the arc spring 65, causing the arc spring 65 to deform. The arc spring 65 provides a counterforce in the torsional direction for the photovoltaic main beam 5, improving the torsional performance and structural stability of the main beam.

[0062] Example 2

[0063] like Figure 4 , Figure 5 As shown, an eccentricity compensation device includes:

[0064] The housing 66 has a mounting point 61 at each end, and the mounting point 61 is a bolt; the housing 66 has a mounting groove 68 inside; the mounting groove 68 has a circular arc shape in cross section; a cover plate 62 is provided on one side of the housing 66, and the cover plate 62 has a circular hole corresponding to the bolt. The bolt passes through the circular hole and fixes the cover plate 62 to the housing 66, thus closing the mounting groove 68.

[0065] Two curved springs 65 are configured; the curved springs 65 are set in the mounting groove 68; the first end and the second end of the curved springs 65 are both provided with connecting rings 67; the first ends of the two curved springs 65 are respectively connected to two mounting points 61;

[0066] A connector 64 is positioned in the middle between two mounting points 61 and is parallel to the photovoltaic main beam 5. Two arc-shaped springs 65 are symmetrically arranged on both sides of the connector 64. One end of the connector 64 is connected to the second end of the two arc-shaped springs 65, and the other end is fixedly connected to a clamp 4, which is fixed to the photovoltaic main beam 5. The connector 64 is a bolt. An arc-shaped hole 63 is provided on the housing 66, and the axis of the arc-shaped hole 63 is collinear with the axis of the mounting groove 68. The arc-shaped hole 63 extends along the axis of the mounting groove 68 and passes through the cover plate 62. The connector 64 passes through the arc-shaped hole 63. The connecting ring 67 at the first end of the arc-shaped spring 65 is hung on the bolt, and the connecting ring 67 at the second end is hung on the connector 64.

[0067] In this embodiment, two eccentric compensation devices 6 are configured, symmetrically arranged on both sides of the bearing housing 1; the outer side of the bearing housing 1 is provided with a mounting part connected to the mounting point 61, the mounting part being an L-shaped adapter 69 independent of the bearing housing 1 and the housing 66; two L-shaped adapters 69 are configured, symmetrically arranged on both sides of the bearing housing 1, and are bolted to the bearing housing 1; the housing 66 is bolted to the L-shaped adapter 69, the L-shaped adapter 69 being located between the bearing housing 1 and the housing 66; the clamp 4 is located on the side of the eccentric compensation device 6 away from the bearing housing 1; the clamp 4 includes a left retaining seat 44, a right retaining seat 45, and a connecting block 46; the connecting block 46 is provided with A circular hole adapted to the connector 64 is provided, through which the connector 64 passes. The clamp 4 is installed on the side of the bearing seat 1 by means of a nut. The left clamp 44 and the right clamp 45 are symmetrically arranged on both sides of the connecting block 46. The left clamp 44 and the right clamp 45 are fastened to the photovoltaic main beam 5, and the upper end is fixed by bolts, and the lower end is fixed to the connecting block 46 by bolts. The bearing seat 1 is fixed to the non-drive column 2. When the photovoltaic main beam 5 rotates relative to the shell 66, the long screw compresses / stretches the arc spring 65, causing the arc spring 65 to deform. The arc spring 65 provides the photovoltaic main beam 5 with a reaction force in the torsional direction, improving the torsional performance and structural stability of the main beam.

[0068] Example 3

[0069] like Figure 6 , Figure 7 As shown, an eccentricity compensation device includes:

[0070] The housing 66 has a mounting point 61 at each end, and the mounting point 61 is a bolt; the housing 66 has a mounting groove 68 inside; the mounting groove 68 has a circular arc shape in cross section; a cover plate 62 is provided on one side of the housing 66, and the cover plate 62 has a circular hole corresponding to the bolt. The bolt passes through the circular hole and fixes the cover plate 62 to the housing 66, thus closing the mounting groove 68.

[0071] Two curved springs 65 are configured; the curved springs 65 are set in the mounting groove 68; the first end and the second end of the curved springs 65 are both provided with connecting rings 67; the first ends of the two curved springs 65 are respectively connected to two mounting points 61;

[0072] The connector 64 is positioned in the middle between the two mounting points 61 and is parallel to the photovoltaic main beam 5. Two arc-shaped springs 65 are symmetrically arranged on both sides of the connector 64. One end of the connector 64 is connected to the second end of the two arc-shaped springs 65, and the other end is fixedly connected to the clamp 4, which is fixed to the photovoltaic main beam 5. The connector 64 is a long screw. An arc-shaped hole 63 is provided on the housing 66, and the axis of the arc-shaped hole 63 is collinear with the axis of the mounting groove 68. The arc-shaped hole 63 extends along the axis of the mounting groove 68 and passes through the cover plate 62. The connector 64 is installed through the arc-shaped hole 63. The connecting ring 67 at the first end of the arc-shaped spring 65 is hung on the bolt, and the connecting ring 67 at the second end is hung on the connector 64.

[0073] In this embodiment, two eccentric compensation devices 6 are configured, symmetrically arranged on both sides of the bearing housing 1; the outer side of the bearing housing 1 is provided with a mounting part connected to the mounting point 61, the mounting part being a perforated ear plate 610, the ear plate 610 being integrally formed with the bearing housing 1; the eccentric compensation device 6 is fixed to the ear plate 610 by bolts at the mounting point 61; the bearing housing 1 is provided with a guide arc hole corresponding to the arc hole 63, and a long screw is movably disposed in the guide arc hole; both ends of the long screw pass through the arc holes 63 of the two eccentric compensation devices 6 respectively and extend to the outer side of the eccentric compensation device 6; the clamp 4 is located on the side of the eccentric compensation device 6 away from the bearing housing 1; the clamp 4 includes a left clamp 44, a right clamp 45, and Connecting block 46; Connecting block 46 is provided with a round hole adapted to connector 64, connector 64 passes through the round hole, and clamp 4 is installed on the side of bearing seat 1 by nut; left clamp 44 and right clamp 45 are symmetrically arranged on both sides of connecting block 46; left clamp 44 and right clamp 45 are fastened to photovoltaic main beam 5, the upper end is fixed by bolt connection, and the lower end is fixed to connecting block 46 by bolt; bearing seat 1 is fixed to non-drive column 2; when photovoltaic main beam 5 rotates relative to shell 66, the long screw compresses / stretches arc spring 65, causing arc spring 65 to deform, and arc spring 65 provides torsional reaction force to photovoltaic main beam 5, improving the torsional performance and structural stability of main beam.

[0074] Example 4

[0075] In addition, such as Figures 8-11As shown, the main beam bearing 3 is sealed inside the bearing housing 1. A space for accommodating the arc spring 65 is formed between the bearing housing 1 and the main beam bearing 3. The arc spring 65 is placed between the bearing housing 1 and the main beam bearing 3. The space is filled with viscous fluid. When the photovoltaic main beam 5 drives the main beam bearing 3 to rotate, it drives the viscous fluid inside the space to rotate. When the rotation speed of the main beam bearing 3 changes suddenly due to external wind force or other reasons, the viscous fluid generates viscous force to hinder the main beam bearing 3 from continuing to rotate, thereby achieving the function of buffering and damping, reducing the vibration damage caused by external wind force and other reasons to the main beam bearing 3 and the photovoltaic main beam 5, playing a role in wind protection, and improving the stability of the overall structure.

[0076] Compared to existing technologies (such as Chinese patents with application numbers 202410950300X and 2021214054411), which use a damper installed on a non-drive column, this invention integrates the bearing housing 1 with a viscous fluid that has a damper function, thus improving the ease of installation.

[0077] Specifically, at least one fixing member 9 for driving the arc spring 65 to move is fixedly installed on the main beam bearing 3, and a blocking member 13 for limiting and blocking the arc spring 65 is installed inside the bearing seat 1. The fixing member 9 can be specifically set as a rectangular block structure with its bottom surface in contact with the outer surface of the main beam bearing 3 and its top surface in contact with the inner wall of the bearing seat 1. Both its top and bottom surfaces are set as arcs. The blocking member 13 is specifically set on the bottom inner wall of the bearing seat 1 and extends towards the main beam bearing 3.

[0078] As an optional solution, the number of arc springs 65 is preferably two. The fixing member 9 and the blocking member 13 are arranged opposite to each other, and both arc springs 65 are arranged between the fixing member 9 and the blocking member 13. Under normal circumstances, when the photovoltaic tracking bracket rotates to track the sun, the fixing member 9 rotates with the photovoltaic main beam 5, thereby compressing the arc spring 65 on at least one side to deform. The arc spring 65 provides a torsional reaction force for the photovoltaic main beam 5, providing dynamic support and eccentricity compensation for the photovoltaic main beam 5, and improving the torsional performance of the main beam.

[0079] Furthermore, a flow channel 10 for viscous fluid to flow through is provided at the top of the fixing member 9. The cross-section of the flow channel 10 is smaller than the cross-section of the accommodating space. In addition, the flow channel 10 can also be provided on the bottom blocking member 13. For example, a through hole can be provided on the blocking member 13 for viscous fluid to pass through. When the rotation speed of the main beam bearing 3 changes suddenly due to external wind force or other reasons, the viscous fluid generates viscous force to prevent the main beam bearing 3 from continuing to rotate. The flow channel 10 can generate viscous force when the fluid speed is too fast. The attraction between molecules hinders their relative motion, thereby generating damping, which reduces the impact of wind gusts on the photovoltaic tracking bracket in windy weather and improves the stability of the photovoltaic tracking bracket during operation.

[0080] As a preferred embodiment, the bearing housing 1 is composed of a housing 8 and an end cap 7. The main beam bearing 3 is sleeved on the photovoltaic main beam 5. A sealing ring 12 is provided between the photovoltaic bearing 3 and the end cap 7, and between the photovoltaic bearing 3 and the housing 8, to seal the outer arc surface of the photovoltaic bearing 3 inside the bearing housing 1 by means of dynamic sealing. After sealing, the photovoltaic bearing 3 can rotate relative to the bearing housing 1.

[0081] To facilitate the addition or replacement of viscous fluid, a liquid inlet 11 and a sealing screw 12 for sealing the liquid inlet 11 are provided on the outer casing 8.

[0082] As an optional alternative, the bearing housing 1 is internally rotatably connected to an inner shell 14, which is rotatably arranged relative to the outer shell 8. A fixing member 9 is fixed to the inner shell 14, and a receiving space is formed between the inner shell 14, the outer shell 8, and the end cap 7. The main beam bearing 3 is fixedly connected to the inner shell 14, for example, by a spline connection or a flat key connection. By fixing the main beam bearing 3 to the inner shell 14 together, when the main beam bearing 3 rotates synchronously with the photovoltaic main beam 5, it drives the inner shell 14 to rotate, and at the same time drives the fixing member 9 installed on the inner shell 14 to move in the receiving space filled with viscous fluid.

[0083] Therefore, in adopting such Figure 8-11 When the bearing housing 1 is filled with viscous fluid, the resistance generated by the viscous fluid is small under normal working conditions because the tracking bracket itself rotates slowly. When subjected to instantaneous strong wind load, the viscous fluid generates viscous resistance. The viscous fluid can dampen and dissipate external energy, preventing damage to the component bracket. It can also effectively reduce the resonance amplitude in the mechanical structure of the tracking bracket, preventing the photovoltaic module from being damaged by microcracks due to excessive amplitude, thus ensuring the safety of the photovoltaic module. Integrating the arc spring 65 and the viscous fluid into the bearing housing 1 can simultaneously provide wind protection and compensate for the torsional eccentricity of the photovoltaic main beam 5 in the length direction.

[0084] Working principle

[0085] This invention utilizes an eccentricity compensation device 6 installed at the non-drive column 2 of the photovoltaic support to suppress the torsion of the main beam by employing the deformation characteristics of an arc spring 65. The specific process is as follows:

[0086] The eccentricity compensation device 6 is fixed to the photovoltaic main beam 5 by clamps 4. The mounting points 61 at both ends of its housing 66 are connected to the first ends of two arc springs 65. The second ends of the two arc springs 65 are connected to a connector 64 parallel to the main beam. The other end of the connector 64 is connected to the clamp 4. When the drive mechanism drives the main beam to rotate, the torsion of the main beam will drive the connector 64 to move through the clamp 4, causing the arc springs 65 to be compressed or stretched in the mounting grooves 68 of the housing 66. The deformed arc springs 65 will generate a reaction force opposite to the torsion direction. This reaction force is transmitted to the main beam through the connector 64 and the clamp 4, thereby offsetting part of the torsional force and reducing the angular deviation between the end of the main beam and the drive point.

[0087] Meanwhile, the arc-shaped hole 63 on the shell 66 and the cover plate 62 cooperates with the connector 64. When the main beam rotates to the limit position, the connector 64 abuts against the wall of the arc-shaped hole 63, which restricts the excessive rotation of the main beam and plays a safety protection role in windy conditions.

[0088] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. An eccentricity compensation device, installed on a photovoltaic main beam via clamps, characterized in that, include: The housing (66) has a mounting point (61) at each end; Two curved springs (65) are provided; the first ends of the two curved springs (65) are respectively connected to two mounting points (61); The connector (64) is placed between two mounting points (61) and is parallel to the photovoltaic main beam (5); one end of the connector (64) is connected to the second end of two arc springs (65), and the other end is connected to the clamp (4); When the photovoltaic main beam (5) rotates relative to the shell (66), the arc spring (65) is deformed through the connector (64), and the arc spring (65) provides a torsional reaction force to the photovoltaic main beam (5).

2. The eccentricity compensation device as described in claim 1, characterized in that, The housing (66) has an internal mounting groove (68) for mounting an arc spring (65); the mounting groove (68) has a circular arc shape in cross section.

3. The eccentricity compensation device as described in claim 1, characterized in that, The mounting point (61) is set as a bolt; a cover plate (62) is provided on one side of the housing (66), and the cover plate (62) is installed on the housing (66) by bolts; the first end and the second end of the arc spring (65) are both provided with connecting rings (67); the connecting ring (67) at the first end of the arc spring (65) is hung on the bolt, and the connecting ring (67) at the second end is hung on the connector (64); the connector (64) is a bolt, a long screw or a rod-shaped structure with cotter pins at both ends.

4. The eccentricity compensation device as described in claim 2, characterized in that, The housing (66) is provided with an arc-shaped hole (63), the axis of the arc-shaped hole (63) and the axis of the mounting groove (68) are collinear; the arc-shaped hole (63) extends along the axis of the mounting groove (68) and passes through the cover plate (62); the connector (64) is provided through the arc-shaped hole (63).

5. An eccentricity compensation device as described in claim 2, characterized in that, The mounting groove (68) is provided with a POM wear-resistant washer for protecting the arc spring (65).

6. A bearing housing for mounting the eccentricity compensation device as described in any one of claims 1 to 5, characterized in that, The bearing housing (1) has a mounting part on its outer side that connects to the mounting point (61). The mounting part is a lug plate (610) with a lug hole or an independent L-shaped adapter (69).

7. A bearing housing as described in claim 6, characterized in that, Two eccentric compensation devices (6) are configured, and the two eccentric compensation devices (6) are symmetrically arranged on both sides of the bearing seat (1).

8. A bearing housing as described in claim 6, characterized in that, The housing (66) and the bearing seat (1) are integrally formed.

9. A bearing housing as described in claim 6, characterized in that, The bearing housing (1) is provided with a guide arc hole, and the connector (64) is movably provided through the guide arc hole.

10. A photovoltaic support bracket, comprising the bearing housing as described in claim 6, characterized in that, It also includes a drive column, a non-drive column (2), a main beam bearing (3), purlins and a drive mechanism; the main beam bearing (3) is installed in the bearing housing (1); The photovoltaic main beam (5) is installed inside the bearing; the purlin is installed on the photovoltaic main beam (5); the bearing seat (1) is fixed on the non-driving column (2); the driving mechanism is installed on the driving column and is used to drive the photovoltaic main beam (5) to rotate.

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