Damping bearing, photovoltaic tracking support and vibration suppression method

Abstract

The embodiment of the invention provides a damping bearing, a photovoltaic tracking support and a vibration suppression method, and relates to the field of photovoltaic tracking supports. The problems that a photovoltaic tracking support absorbs energy and reduces vibration through a linear damper, the structure is complex, vibration reduction is not facilitated, and damping force is not easy to control are solved. According to the damping bearing, at least one annular cavity is formed between a bearing inner ring and a bearing outer ring, the annular cavity comprises a plurality of sub-cavities which are arranged in the annular direction and communicate with one another, each sub-cavity is provided with a backflow runner structure used for generating damping force, at least one row of shifting pieces are arranged on the bearing inner ring, and the at least one row of shifting pieces extend into the annular cavity; the shifting piece is matched with the sub-cavity, and damping force for hindering movement is generated through backflow of the damping liquid. According to the photovoltaic tracking support and the vibration suppression method, the damping bearing is adopted, damping force generated by backflow of damping liquid is utilized, energy in the movement process of the bearing can be effectively buffered and absorbed, vibration and impact are reduced, and the torsion stability of the support is improved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic tracking brackets, and more specifically, to a damping bearing, a photovoltaic tracking bracket, and a vibration suppression method. Background Technology

[0002] A photovoltaic (PV) tracker is a power device that adjusts the tilt angle of PV modules in real time to ensure they are always facing the sun, effectively increasing the amount of solar radiation received by the PV modules. During operation, a solar tracking system needs to continuously adjust the angle of the solar panels to track the sun's movement. This process may be affected by factors such as wind and mechanical movement, causing vibrations in the system. These vibrations are transmitted to various components, affecting the system's stability and lifespan. Furthermore, with the application of high-power PV modules, their size and flexibility have increased, resulting in greater wind loads and more pronounced wind-induced vibrations on the module surface, making PV trackers more susceptible to damage in windy weather.

[0003] The existing photovoltaic tracking brackets mainly rely on linear dampers to absorb energy and reduce vibration under strong wind protection. However, additional structural fixtures are required to install the linear dampers. Due to the large number of installation parts, more gaps are inevitable, which are detrimental to the vibration of the bracket. Furthermore, the damping force of the linear damper at different rotation angles is also difficult to control. Summary of the Invention

[0004] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0005] The present invention aims to provide, for example, a damping bearing, a photovoltaic tracking bracket, and a vibration suppression method, which can improve the problems of photovoltaic tracking brackets absorbing energy and reducing vibration through linear dampers, which have complex structures that are not conducive to vibration reduction and whose damping force is difficult to control.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] An embodiment of the present invention provides a damping bearing, including an outer bearing ring and an inner bearing ring. The inner bearing ring is coaxially disposed inside the outer bearing ring. At least one circumferential cavity is formed between the inner bearing ring and the outer bearing ring. The circumferential cavity is filled with damping fluid. The circumferential cavity includes a plurality of sub-cavities arranged circumferentially and communicating with each other. Each sub-cavity is provided with a return flow channel structure for generating damping force. The sub-cavity has a first port and a second port that are positioned opposite each other. The first port to the second port of the sub-cavity are arranged counterclockwise to form a reverse flow channel, and the first port to the second port of the sub-cavity are arranged clockwise to form a forward flow channel.

[0008] The inner ring of the bearing is provided with at least one row of paddles, which extend into the circumferential cavity; the paddles cooperate with the sub-cavity and generate a damping force that hinders movement through the backflow of damping fluid.

[0009] In addition, the damping bearing provided in the embodiments of the present invention may also have the following additional technical features:

[0010] Optionally, the sub-cavity includes three parallel circumferential flow channels, namely a central flow channel and side flow channels located on both sides of the central flow channel. The central flow channel is used for the paddle to extend into. The first ports of the two side flow channels are provided with arc-shaped backflow channel structures. The backflow channel structures are used to guide the liquid to flow back in the opposite direction so as to collide with the liquid in the central flow channel and form resistance.

[0011] Optionally, the sub-cavity is provided with two flow guides, and the intermediate flow channel is formed between the two flow guides. The paddle is used to extend between the two flow guides, and the side flow channels are formed between the outer sides of the two flow guides and the two side walls of the sub-cavity.

[0012] Optionally, the distance between the two side walls of the sub-cavity gradually increases along the direction from the second port to the first port of the flow channel, and the distance between the two flow guides also gradually increases along the direction from the second port to the first port of the flow channel.

[0013] Optionally, the inner ring surface of the bearing is provided with an circumferential flow guide groove, and at least one row of paddles is disposed in the circumferential flow guide groove, wherein the width of the paddles is smaller than the groove width of the circumferential flow guide groove, so as to form a liquid flow gap between the paddles and the circumferential flow guide groove.

[0014] Optionally, the outer ring of the bearing includes a left half bearing housing and a right half bearing housing that can be assembled, the left half bearing housing and the right half bearing housing together forming the circumferential cavity.

[0015] Optionally, two independent circumferential cavities are formed between the outer ring and the inner ring of the bearing. The sub-cavities of one circumferential cavity are all configured as reverse flow channels, and the sub-cavities of the other circumferential cavity are all configured as forward flow channels. The inner ring of the bearing is provided with two rows of pawls with opposite inclination directions, which extend into the two circumferential cavities respectively.

[0016] Optionally, an circumferential cavity is formed between the outer ring of the bearing and the inner ring of the bearing. The sub-cavities are divided into multiple groups, each group including a reverse flow channel sub-cavity and a forward flow channel sub-cavity. The return flow channel structures of the reverse flow channel sub-cavity and the forward flow channel sub-cavity are opposite in direction. The paddle is a straight plate structure perpendicular to the surface of the inner ring of the bearing.

[0017] An embodiment of the present invention also provides a photovoltaic tracking bracket. The photovoltaic tracking bracket includes a column, a main beam, purlins, and a damping bearing; the main beam is mounted on the column via the damping bearing, and the purlins are fixed on the main beam and used to support the photovoltaic modules.

[0018] Embodiments of the present invention also provide a vibration suppression method applied to a photovoltaic tracking bracket, comprising:

[0019] When the main beam rotates at low speed, the damping fluid flows through the gap between the paddles, and the resistance is negligible.

[0020] Under high-speed vibration of the main beam:

[0021] When one circumferential cavity is provided, the reverse flow channel sub-cavity dampes the reverse flow, and the forward flow channel sub-cavity dampes the forward flow.

[0022] When two circumferential cavities are provided, forward flow triggers damping in the forward flow channel cavity, and reverse flow triggers damping in the reverse flow channel cavity.

[0023] The beneficial effects of the damping bearing, photovoltaic tracking bracket, and vibration suppression method according to embodiments of the present invention include, for example:

[0024] A damping bearing includes an outer ring and an inner ring, the inner ring being coaxially disposed inside the outer ring. At least one circumferential cavity is formed between the inner and outer rings, and the circumferential cavity is filled with damping fluid. The circumferential cavity includes multiple sub-cavities arranged circumferentially and communicating with each other. Each sub-cavity has a return flow channel structure for generating damping force. The sub-cavity has a first port and a second port located opposite each other. The first port to the second port of the sub-cavity are arranged counterclockwise to form a reverse flow channel, and the first port to the second port of the sub-cavity are arranged clockwise to form a forward flow channel. The inner ring of the bearing is provided with at least one row of levers, which extend into the circumferential cavity. The levers cooperate with the sub-cavities and generate a damping force that hinders movement through the return flow of damping fluid.

[0025] The interaction between the paddle, the sub-cavity, and the damping fluid, utilizing the damping force generated by the fluid's backflow, effectively buffers and absorbs energy during bearing movement, reducing vibration and impact, resulting in smoother bearing operation and lower noise. Simultaneously, the design of reverse and forward flow channels ensures stable damping force generated by the corresponding flow channels and sub-cavities regardless of whether the bearing rotates clockwise or counterclockwise, guaranteeing good vibration reduction and noise reduction effects in different motion directions, thus improving bearing performance and reliability. By integrating the bearing rotation and vibration damping forces into a single device, the number of connecting parts is reduced, and reliable damping force can be provided for different wind speeds and arbitrary support angles, enhancing the torsional stability of the support.

[0026] The photovoltaic tracking bracket and vibration suppression method, using the aforementioned damping bearing, can improve the problem of energy absorption and vibration reduction of the photovoltaic tracking bracket through linear damper, which has the disadvantages of complex structure, unfavorable vibration reduction, and difficult control of damping force. Attached Figure Description

[0027] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0028] Figure 1 A three-dimensional schematic diagram of a damping bearing provided in an embodiment of the present invention;

[0029] Figure 2 A three-dimensional schematic diagram of the outer ring of a damping bearing provided in an embodiment of the present invention;

[0030] Figure 3 A three-dimensional schematic diagram of the left half bearing housing of the damping bearing provided in an embodiment of the present invention;

[0031] Figure 4 A three-dimensional schematic diagram of the right half bearing housing of a damping bearing provided in an embodiment of the present invention;

[0032] Figure 5 A schematic diagram of the right half bearing cavity and fluid flow of a damping bearing provided in an embodiment of the present invention;

[0033] Figure 6 A three-dimensional schematic diagram of the inner ring of a damping bearing provided in an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of a single-row cavity structure of a damping bearing housing provided in an embodiment of the present invention;

[0035] Figure 8This is a schematic diagram of the structure of a photovoltaic tracking bracket provided in an embodiment of the present invention.

[0036] Icons: Photovoltaic tracking bracket-10; Column-11; Main beam-12; Plinth-13; Damping bearing-14; Photovoltaic module-15; Bearing outer ring-100; Left half bearing seat-110; Right half bearing seat-120; Circumferential cavity-130; Cavity one-131; Cavity two-132; Sub-cavity-140; First port-141; Second port-142; Return flow channel structure-143; Circumferential flow channel-150; Middle flow channel-151; Side flow channel-152; Guide component-160; Sealing groove-170; Sealing boss-171; Circumferential sealing boss-180; Bearing inner ring-200; Paddle-210; Circumferential guide groove-220; Circumferential sealing groove-230. Detailed Implementation

[0037] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0038] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," "outer," or "vertical" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use, and does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0039] At the same time, it should be noted that the terms "first" and "second" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components, etc. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] The following is combined Figures 1 to 8 The damping bearing 14 provided in this embodiment will be described in detail.

[0042] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 An embodiment of the present invention provides a damping bearing 14, including an outer bearing ring 100 and an inner bearing ring 200. The inner bearing ring 200 is coaxially disposed inside the outer bearing ring 100. At least one circumferential cavity 130 is formed between the inner bearing ring 200 and the outer bearing ring 100. The circumferential cavity 130 is filled with damping fluid. The circumferential cavity 130 includes a plurality of sub-cavities 140 arranged circumferentially and communicating with each other. Each sub-cavity 140 is provided with a return flow channel structure 143 for generating damping force. The sub-cavity 140 has a first port 141 and a second port 142 that are positioned opposite each other. The first port 141 to the second port 142 are arranged counterclockwise to form a reverse flow channel, and the first port 141 to the second port 142 are arranged clockwise to form a forward flow channel. The inner ring 200 of the bearing is provided with at least one row of paddles 210, which extend into the circumferential cavity 130. The paddles 210 cooperate with the sub-cavity 140 and generate a damping force that hinders movement through the backflow of damping fluid.

[0043] "The first port 141 to the second port 142 of the sub-cavity 140 are arranged counterclockwise to form a reverse flow channel, and the first port 141 to the second port 142 of the sub-cavity 140 are arranged clockwise to form a forward flow channel." When the liquid flows counterclockwise, the reverse flow channel does not generate resistance, while the forward flow channel generates resistance. When the liquid flows clockwise, the reverse flow channel generates resistance, while the forward flow channel does not generate resistance. During the relative rotation of the axial inner ring and the bearing outer ring 100, the liquid flow direction is unified; it either flows clockwise together or counterclockwise together. Therefore, when the liquid flows in the opposite direction relative to the flow channel, backflow will occur.

[0044] The inner ring 200 of the bearing is coaxially disposed within the outer ring 100, forming at least one circumferential cavity 130 filled with damping fluid. The circumferential cavity 130 is composed of multiple circumferentially arranged and interconnected sub-cavities 140. The sub-cavities 140 are arranged counterclockwise to form a reverse flow channel and clockwise to form a forward flow channel. When the inner ring 200 moves relative to the outer ring, the paddle 210, which is disposed on the inner ring 200 and extends into the circumferential cavity 130, moves accordingly. During the movement of the paddle 210, it enters the sub-cavity 140 and pushes the damping fluid within the sub-cavity 140. Because the sub-cavity 140 is provided with a return flow channel structure 143, the damping fluid cannot flow directly and smoothly in the direction of movement of the paddle 210, but must return through the return flow channel. During the return flow of the damping fluid, the resistance generated by the return flow channel structure 143 hinders the movement of the paddle 210, thereby hindering the movement of the inner ring 200 relative to the outer ring.

[0045] Through this structure, the paddle 210 interacts with the sub-cavity 140 and the damping fluid. The damping force generated by the backflow of the damping fluid effectively buffers and absorbs energy during bearing movement, reducing vibration and impact, resulting in smoother bearing operation and lower noise. Simultaneously, the design of reverse and forward flow channels ensures that the bearing generates stable damping force through the corresponding flow channels and sub-cavity 140 regardless of whether it rotates forward or backward. This guarantees good vibration reduction and noise reduction effects in different motion directions, improving the bearing's performance and reliability.

[0046] Reference Figure 5 In this embodiment, the sub-cavity 140 includes three parallel circumferential flow channels 150, namely a middle flow channel 151 and side flow channels 152 located on both sides of the middle flow channel 151. The middle flow channel 151 is used for the paddle 210 to extend into. The first port 141 of the two side flow channels 152 is provided with an arc-shaped return flow channel structure 143. The return flow channel structure 143 is used to guide the liquid to flow back in the opposite direction so as to form resistance by colliding with the liquid in the middle flow channel 151.

[0047] The sub-cavity 140 has three parallel circumferential flow channels 150, with the middle flow channel 151 into which the lever 210 extends. When the bearing moves, the lever 210 pushes the liquid in the middle flow channel 151 to flow. The arc-shaped return flow channel structure 143 at the first port 141 of the two side flow channels 152 guides the liquid in the side flow channels 152 to flow back in the opposite direction. In this way, the backflowing liquid collides with the liquid in the middle flow channel 151 pushed by the lever 210. The liquid collision generates strong resistance, which effectively hinders the movement of the lever 210, and thus hinders the relative movement of the inner and outer rings of the bearing, achieving a good buffering and vibration reduction effect, reducing the vibration and noise during bearing operation, and improving the stability and reliability of bearing operation.

[0048] Reference Figure 5 In this embodiment, two flow guides 160 are provided in the sub-cavity 140, and an intermediate flow channel 151 is formed between the two flow guides 160. The paddle 210 is used to extend between the two flow guides 160, and side flow channels 152 are formed between the outer sides of the two flow guides 160 and the two side walls of the sub-cavity 140, respectively.

[0049] Two guide members 160 in the sub-cavity 140 form an intermediate flow channel 151 into which the paddle 210 extends, and its outer side forms a side flow channel 152 with the side wall of the sub-cavity 140. The movement of the paddle 210 pushes the liquid in the intermediate flow channel 151, forming a relative flow with the liquid in the side flow channel 152. The relative flow generates resistance, hindering the movement of the paddle 210, thereby achieving buffering and vibration reduction and improving the operating stability of the bearing.

[0050] Reference Figure 5Specifically, the first ports 141 of the two guide members 160 are both arc surfaces, forming an arc-shaped guide channel with the arc-shaped return flow channel structure 143.

[0051] Reference Figure 5 In this embodiment, the distance between the two side walls of the sub-cavity 140 gradually increases along the direction from the second port 142 to the first port 141 of the flow channel, and the distance between the two guide members 160 also gradually increases along the direction from the second port 142 to the first port 141 of the flow channel.

[0052] The distance between the two side walls of the sub-cavity 140 and the two guide members 160 gradually increases from the second port 142 to the first port 141 of the flow channel, making the flow channel expand. When the lever 210 moves to drive the liquid flow, the expansion of the flow channel causes changes in the liquid flow velocity, generating a pressure difference. The pressure difference forms resistance, effectively buffering vibration and improving the smoothness of bearing operation.

[0053] Reference Figure 6 In this embodiment, the inner ring 200 of the bearing is provided with an circumferential flow guide groove 220, and at least one row of paddles 210 are disposed in the circumferential flow guide groove 220. The width of the paddles 210 is smaller than the groove width of the circumferential flow guide groove 220, so as to form a liquid flow gap between the paddles 210 and the circumferential flow guide groove 220.

[0054] The inner ring 200 of the bearing is provided with a circumferential flow guide groove 220 and a pawl 210. The width of the pawl 210 is smaller than the width of the groove, forming a liquid flow gap. When the bearing is running, the pawl 210 pushes the liquid, and some of the liquid flows through the gap. At low speeds, the resistance is negligible.

[0055] Specifically, when the first port 141 to the second port 142 of the sub-cavity 140 are arranged counterclockwise to form a reverse flow channel, the paddle 210 extending into the sub-cavity 140 is inclined clockwise; when the first port 141 to the second port 142 of the sub-cavity 140 are arranged clockwise to form a forward flow channel, the paddle 210 extending into the sub-cavity 140 is inclined counterclockwise.

[0056] Reference Figure 2 , Figure 3 and Figure 4 In this embodiment, the outer ring 100 of the bearing includes a left half bearing seat 110 and a right half bearing seat 120 that can be assembled. The left half bearing seat 110 and the right half bearing seat 120 together form an circumferential cavity 130.

[0057] The outer ring 100 of the bearing is designed as two combinable left and right bearing housings 120, which together form an annular cavity 130 when assembled. This structure facilitates the installation and maintenance of the internal components of the annular cavity 130, and also allows for flexible adjustment of the cavity size according to actual needs, improving bearing assembly efficiency and applicability.

[0058] Reference Figure 2 , Figure 3 , Figure 4 and Figure 6 Specifically, the left half bearing housing 110 is provided with a sealing groove 170 and a sealing boss 171 at both ends, and the right half bearing housing 120 is provided with a sealing boss 171 and a sealing groove 170 at both ends. The sealing groove 170 and the sealing boss 171 of the left half bearing housing 110 and the right half bearing housing 120 are interlocked and sealed, and play a positioning role. Then the left half bearing housing 110 and the right half bearing housing 120 are fixed by fasteners.

[0059] Reference Figure 5 In this embodiment, two independent circumferential cavities 130 are formed between the outer ring 100 and the inner ring 200 of the bearing. The sub-cavities 140 of one circumferential cavity 130 are all configured as reverse flow channels, and the sub-cavities 140 of the other circumferential cavity 130 are all configured as forward flow channels. The inner ring 200 of the bearing is provided with two rows of paddles 210 with opposite tilting directions, which extend into the two circumferential cavities 130 respectively.

[0060] The damping bearing 14 has two independent circumferential cavities 130 between the outer ring 100 and the inner ring 200. All sub-cavities 140 of one circumferential cavity 130 are arranged counterclockwise to form a reverse flow channel, while the sub-cavities 140 of the other circumferential cavity 130 are arranged clockwise to form a forward flow channel. Simultaneously, two rows of diametrically opposed paddles 210 are cleverly provided on the inner ring 200, extending precisely into the two different circumferential cavities 130. When the inner ring 200 moves relative to the outer ring, the two rows of paddles 210 move synchronously. Because the paddles 210 are tilted in different directions, one row of paddles 210 pushes the liquid in the annular cavity 130 of the reverse flow channel, causing the liquid to flow along the reverse flow channel; while the other row of paddles 210 in the annular cavity 130 of the forward flow channel pushes the liquid to flow forward along the forward flow channel, which will cause backflow at the arc-shaped backflow channel structure 143, colliding with the forward-flowing liquid and generating resistance. At the same time, the forward-rotating paddles 210 are also resisted by the backflowing liquid.

[0061] Specifically, when the outer ring 100 of the bearing does not rotate, and the inner ring 200 of the bearing rotates counterclockwise relative to the outer ring 100, the liquid flows counterclockwise along the reverse flow channel of the sub-cavity 140 (i.e., cavity 132 in the figure), without generating resistance. However, in the forward flow channel of the sub-cavity 140 (i.e., cavity 131 in the figure), the liquid also flows counterclockwise, which is opposite to the setting direction of the sub-cavity 140. This will cause backflow at the arc-shaped return flow channel structure 143, generating resistance.

[0062] Specifically, the inner surface of the bearing outer ring 100 is provided with three circumferential sealing bosses 180, which are arranged side by side and spaced apart along the axial direction. An circumferential cavity 130 is provided between two adjacent circumferential sealing bosses 180. Correspondingly, the inner surface of the bearing inner ring 200 is provided with three circumferential sealing grooves 230, which are interlocked with the three circumferential sealing bosses 180 to seal the circumferential cavity 130.

[0063] Reference Figure 7 In this embodiment, an circumferential cavity 130 is formed between the outer ring 100 and the inner ring 200 of the bearing. The sub-cavities 140 are divided into multiple groups, each group including a reverse flow channel sub-cavity 140 and a forward flow channel sub-cavity 140. The return flow channel structures 143 of the reverse flow channel sub-cavity 140 and the forward flow channel sub-cavity 140 are in opposite directions. The paddle 210 is a straight plate structure perpendicular to the surface of the inner ring 200 of the bearing.

[0064] The sub-cavities 140 are arranged alternately in clockwise and counterclockwise directions, and two adjacent sub-cavities 140 are arranged in opposite directions, one in clockwise direction and the other in counterclockwise direction. During the rotation of the bearing, one sub-cavity 140 does not generate resistance, while the other sub-cavity 140 generates resistance.

[0065] Reference Figure 8 The present invention also provides a photovoltaic tracking bracket 10. The photovoltaic tracking bracket 10 includes a column 11, a main beam 12, a purlin 13, and a damping bearing 14; the main beam 12 is mounted on the column 11 via the damping bearing 14, and the purlin 13 is fixed on the main beam 12 and used to support the photovoltaic module 15.

[0066] The main beam 12 is mounted on the column 11 via a damping bearing 14. The damping bearing 14 uses its internal structure to generate damping force by allowing fluid to flow. When external factors cause the main beam 12 to sway, the damping force can buffer and reduce vibration, allowing the main beam 12 to rotate smoothly, ensuring the stability of the purlins 13 and photovoltaic modules 15 fixed on it, and improving power generation efficiency.

[0067] An embodiment of the present invention also provides a vibration suppression method applied to a photovoltaic tracking bracket 10, comprising: when the main beam 12 rotates at low speed, the damping fluid flows through the gap of the paddle 210, and the resistance is negligible; when the main beam 12 vibrates at high speed: when one circumferential cavity 130 is provided, the reverse flow channel sub-cavity 140 dampes the reverse flow, and the forward flow channel sub-cavity 140 dampes the forward flow; when two circumferential cavities 130 are provided, the forward flow triggers the forward flow channel cavity damping, and the reverse flow triggers the reverse flow channel cavity damping.

[0068] When the main beam 12 rotates at low speed, the resistance of the damping fluid through the gap of the paddle 210 is negligible. During high-speed vibration, the positive flow channel sub-cavities 140 in the single-circular cavity 130 generate mutual damping. In the case of double-circular cavities 130, the positive flow triggers the damping of the other flow channel cavity, with one circular cavity 130 being triggered at a time. This effectively suppresses the vibration of the main beam 12 and ensures the stable operation of the photovoltaic tracking bracket 10.

[0069] Reference Figures 1 to 7 According to the damping bearing 14 provided in this embodiment, the working principle of the damping bearing 14 includes:

[0070] Two independent circumferential cavities 130 are provided between the outer ring 100 and the inner ring 200 of the bearing. A certain number of sub-cavities 140 are distributed in the circumferential direction of the circumferential cavity 130. Each sub-cavity 140 is arranged in the same direction, such as clockwise or counterclockwise, and is interconnected. Each sub-cavity 140 is composed of three circumferential flow channels 150. The side flow channels 152 on both sides are symmetrically arranged about the middle flow channel 151. The second port 142 of the sub-cavity 140 is narrower, and the first port 141 of the sub-cavity 140 has a larger opening, so that liquid can flow in from the three circumferential flow channels 150 at the same time. The side flow channels 152 on both sides are designed with an arc-shaped return flow channel structure 143 at the first port 141 position to allow the liquid to return. The return liquid on both sides collides with the liquid in the middle flow channel 151, forming resistance. The sub-cavity 140 of cavity 131 is arranged in the opposite direction to that of cavity 132, so that the bearing can have damping in both clockwise and counterclockwise directions.

[0071] The bearing inner ring 200 has three circumferential sealing grooves 230 and two circumferential flow guide grooves 220. A certain number of paddles 210 are circumferentially distributed inside the circumferential flow guide grooves 220. The width of the paddles 210 is narrower than the flow guide grooves, with gaps on both sides to facilitate liquid flow. The two rows of paddles 210 have opposite inclination angles, corresponding to cavity one 131 and cavity two 132 within the bearing housing, respectively. The paddles 210 are set at an angle relative to the tangent of the bearing inner ring 200. The paddles 210 are inclined towards the first port 141 within the intermediate flow channel 151, and the distance between the paddles 210 and the first port 141 is less than the distance between the paddles 210 and the second port 142. During installation, the bearing inner ring 200 is first placed into the left half bearing housing 110, and then the right half bearing housing 120 is assembled. The two bearing housings can be tightly fitted together using external fasteners, forming two independent cavities with the bearing inner ring 200. Finally, damping fluid is injected to complete the assembly of the damping bearing 14.

[0072] During normal operation, the main beam 12 rotates very slowly, and the damping fluid itself does not generate much damping force. The damping fluid flows through the gap between the deflector 210 and the guide channel, and the main beam 12 operates normally. When the strong wind protection is activated, the main beam 12 rotates at a relatively high instantaneous speed. If the main beam 12 rotates counterclockwise, the damping fluid in cavity one 131 will be driven to flow by the deflector 210. Under the special flow channel design, the flow channels on both sides will form a liquid backflow, which will collide with the liquid in the middle flow channel 151 in the opposite direction, hindering the liquid flow and creating resistance to the deflector 210. In cavity two 132, since the flow channels are opposite, there will be no backflow, and the liquid will flow in one direction. Moreover, the deflector 210 is tilted clockwise, which is consistent with the direction of the fluid. The damping fluid in the cavity will not create resistance to the deflector 210. Under the action of the cavity damping force, the vibration energy of the main beam 12 will be absorbed, reducing the amplitude and improving the torsional stability of the main beam 12. When the main beam 12 rotates clockwise, the principle is similar. Cavity 2 132 will form a backflow, and the damping force will take effect, while cavity 1 131 will not have any effect.

[0073] A circumferential cavity 130 is provided between the outer ring 100 and the inner ring 200 of the bearing. Sub-cavities 140 are arranged in pairs along the circumferential direction, one in the forward direction and one in the reverse direction. At this time, the inner ring 200 of the bearing also has only one circumferential guide groove 220, and the paddle 210 can only be arranged along the arc surface normal. Compared with the previous scheme, the structural size is reduced. However, since there are forward and reverse designs in the same cavity, the resistance always exists.

[0074] The damping bearing 14 provided in this embodiment has at least the following advantages:

[0075] There are two independent circumferential cavities 130 between the outer ring 100 and the inner ring 200 of the bearing. The two circumferential cavities 130 have opposite shapes and directions, respectively corresponding to the clockwise and counterclockwise rotation of the main beam 12. Two rings of flaps 210 on the inner ring 200 are inserted into the grooves of the circumferential cavities 130. After installation, the circumferential cavities 130 are filled with damping fluid. When the support rotates normally, the speed is very slow, and the damping fluid does not generate much damping force. When the support is subjected to strong wind vibration, the instantaneous speed is large. When the fluid flows in one direction, one circumferential cavity 130 causes the fluid to flow in one direction, while the structure of the other circumferential cavity 130 causes the fluid to flow back, generating resistance. The damping fluid then generates a large damping force, which is transmitted to the flaps 210 on the inner ring, thereby reducing the vibration of the main beam 12.

[0076] By combining the damping force of bearing rotation and vibration reduction into a single device, the number of connecting parts is reduced, while providing reliable damping force for different wind speeds and arbitrary support angles, thereby improving the torsional stability of the support.

[0077] It reduces the number of structural components, reduces installation gaps, and improves the stress stability of the support; it can provide damping force at any rotation angle, reduce torsional vibration of the support, has better adaptability, and high torsional stability; it can be pre-installed, making on-site installation convenient and reducing structural costs.

[0078] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A damping bearing, characterized in that, include: Bearing outer ring; The bearing includes an inner ring, which is coaxially disposed inside the outer ring. At least one circumferential cavity is formed between the inner and outer rings. The circumferential cavity is filled with damping fluid. The circumferential cavity includes multiple sub-cavities arranged circumferentially and communicating with each other. Each sub-cavity is provided with a return flow channel structure for generating damping force. The sub-cavity has a first port and a second port that are positioned opposite each other. The first port to the second port of the sub-cavity are arranged counterclockwise to form a reverse flow channel, and the first port to the second port of the sub-cavity are arranged clockwise to form a forward flow channel. The inner ring of the bearing is provided with at least one row of paddles, which extend into the circumferential cavity; the paddles cooperate with the sub-cavity and generate a damping force that hinders movement through the backflow of damping fluid.

2. The damping bearing according to claim 1, characterized in that: The sub-cavity includes three parallel circumferential flow channels, namely a central flow channel and side flow channels located on both sides of the central flow channel. The central flow channel is used for the paddle to extend into. The first ports of the two side flow channels are provided with arc-shaped backflow channel structures. The backflow channel structures are used to guide the liquid to flow back in the opposite direction so as to collide with the liquid in the central flow channel and form resistance.

3. The damping bearing according to claim 2, characterized in that: The sub-cavity is provided with two flow guides, and the intermediate flow channel is formed between the two flow guides. The paddle is used to extend between the two flow guides, and the side flow channels are formed between the outer sides of the two flow guides and the two side walls of the sub-cavity.

4. The damping bearing according to claim 3, characterized in that: The distance between the two side walls of the sub-cavity gradually increases along the direction from the second port to the first port of the flow channel, and the distance between the two flow guides also gradually increases along the direction from the second port to the first port of the flow channel.

5. The damping bearing according to claim 1, characterized in that: The inner ring surface of the bearing is provided with an circumferential flow guide groove, and at least one row of paddles is disposed in the circumferential flow guide groove, wherein the width of the paddles is smaller than the groove width of the circumferential flow guide groove, so as to form a liquid flow gap between the paddles and the circumferential flow guide groove.

6. The damping bearing according to claim 1, characterized in that: The outer ring of the bearing includes a left half bearing housing and a right half bearing housing that can be assembled, and the left half bearing housing and the right half bearing housing together form the circumferential cavity.

7. The damping bearing according to claim 1, characterized in that: The outer ring and inner ring of the bearing form two independent circumferential cavities. The sub-cavities of one circumferential cavity are all configured as reverse flow channels, and the sub-cavities of the other circumferential cavity are all configured as forward flow channels. The inner ring of the bearing is provided with two rows of pawls with opposite inclination directions, which extend into the two circumferential cavities respectively.

8. The damping bearing according to claim 1, characterized in that: An circumferential cavity is formed between the outer ring and the inner ring of the bearing. The sub-cavities are divided into multiple groups, each group including a reverse flow channel sub-cavity and a forward flow channel sub-cavity. The return flow channel structures of the reverse flow channel sub-cavity and the forward flow channel sub-cavity are opposite in direction. The paddle is a straight plate structure perpendicular to the surface of the inner ring of the bearing.

9. A photovoltaic tracking bracket, characterized in that, The photovoltaic tracking bracket includes a column, a main beam, purlins, and a damping bearing as described in any one of claims 1-8; the main beam is mounted on the column via the damping bearing, and the purlins are fixed on the main beam and used to support the photovoltaic modules.

10. A vibration suppression method, applied to the photovoltaic tracking bracket of claim 9, characterized in that, include: When the main beam rotates at low speed, the damping fluid flows through the gap between the paddles, and the resistance is negligible. Under high-speed vibration of the main beam: When one circumferential cavity is provided, the reverse flow channel sub-cavity dampes the reverse flow, and the forward flow channel sub-cavity dampes the forward flow. When two circumferential cavities are provided, forward flow triggers damping in the forward flow channel cavity, and reverse flow triggers damping in the reverse flow channel cavity.

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