Foundation wind erosion prevention device for desert solar power station

Abstract

The invention provides a foundation wind erosion prevention device for a desert solar power station, and relates to the technical field of solar power generation, the foundation wind erosion prevention device comprises a plurality of arc-shaped flow guide assemblies, the arc-shaped flow guide assemblies define an annular flow guide structure surrounding a pile foundation, the flow guide assemblies are located at the bottoms of the arc-shaped flow guide assemblies and provided with flow guide planes away from the pile foundation in the circumferential direction, and the flow guide planes make contact with the ground surface to form linear flow guide boundaries; the flow guide curved surface is located on the outer side of each arc-shaped flow guide assembly, the longitudinal section of the flow guide curved surface is a smooth curve, the bottom of the flow guide curved surface is flush with the flow guide plane or forms a continuous transition surface, and the flow guide curved surface is used for converting vertical wind pressure into airflow in the horizontal direction; and the flow guide blades are obliquely arranged on the upper portion of the flow guide curved surface and used for generating rotation torque enabling the foundation wind erosion prevention device to be tightly attached to the pile foundation through the wind pressure difference. Vertical wind pressure can be effectively converted, active fastening torque is generated, and the device adapts to different erosion mechanisms.

Description

Technical Field

[0001] The present invention relates to the technical field of solar power generation, and in particular to a foundation wind erosion prevention device for a desert solar power station. Background Art

[0002] In desert environments, the pile foundations of solar power stations are often affected by wind and sand erosion, which can loosen the foundation roots and affect the structural stability of the solar array. The main mechanisms of wind and sand erosion include vortex shedding and the horseshoe vortex effect.

[0003] When the wind speed reaches a certain value, the airflow around the pile foundation will produce vortex shedding. Specifically, when the Reynolds number is between 100 and 300, the vortex begins to shed periodically; when the Reynolds number exceeds 300, the vortex begins to shed randomly. As the Reynolds number continues to increase, the randomness of vortex shedding also increases, eventually forming turbulence. This vortex shedding can cause violent fluctuations in local pressure, rolling up sand. A low-pressure area forms at the center of the vortex, continuously sucking in and ejecting sand around the pile, forming an erosion pit. Especially in pile foundation arrays, the wake vortex of the upstream pile will enhance the vortex intensity of the downstream pile, further exacerbating wind and sand erosion.

[0004] Furthermore, at the intersection of the pile foundation and the ground, the airflow is blocked and splits into a three-dimensional spiral vortex around the pile, resembling a horseshoe and extending downstream like a "drill bit." This horseshoe vortex carries sand particles and scours the soil at the base of the pile foundation in a spiral trajectory, forming an inverted cone-shaped erosion pit.

[0005] In summary, wind-driven sand erosion around pile foundations not only loosens the foundation roots but also seriously impacts the structural stability of solar arrays. Therefore, it is crucial to develop an effective foundation wind erosion prevention device to reduce wind-driven sand erosion on pile foundations and improve the structural stability of solar power stations. Summary of the Invention

[0006] The purpose of the present invention is to overcome at least one of the above-mentioned shortcomings of the prior art and provide a foundation wind erosion prevention device for desert solar power stations that can effectively convert vertical wind pressure, generate active tightening torque, and adapt to different erosion mechanisms.

[0007] Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

[0008] According to one aspect of the present invention, a foundation wind erosion prevention device for a desert solar power station is provided, comprising a plurality of arc-shaped guide assemblies, wherein the plurality of arc-shaped guide assemblies are combined to form an annular guide structure surrounding a pile foundation, wherein each of the arc-shaped guide assemblies comprises: an annular support portion, located at the bottom of each of the arc-shaped diversion components, having a diversion plane circumferentially away from the pile foundation, wherein the diversion plane contacts the ground surface to form a linear diversion boundary; A guide curved surface, located outside each of the arc-shaped guide components, has a smooth longitudinal section and a bottom that is flush with the guide plane or forms a continuous transition surface, and is used to convert vertical wind pressure into horizontal airflow; The guide vanes are obliquely arranged on the upper portion of the guide curved surface and are used to generate a rotational torque through a wind pressure difference so as to make the foundation wind erosion protection device close to the pile foundation.

[0009] In some exemplary embodiments of the present invention, based on the aforementioned solution, the curvature radius of the guide surface decreases from bottom to top.

[0010] In some exemplary embodiments of the present invention, based on the aforementioned solution, the guide plane and the guide curved surface are integrally connected and formed.

[0011] In some exemplary embodiments of the present invention, based on the above solution, each of the arc-shaped guide components further includes: The butt joint surfaces of two adjacent arc-shaped guide assemblies are spliced together to form the guide blade.

[0012] In some exemplary embodiments of the present invention, based on the aforementioned solution, a detachable connection structure is provided on the docking surface for fixing the annular guide structure.

[0013] In some exemplary embodiments of the present invention, based on the aforementioned solution, the detachable connection structure includes: An array of bolt holes passing through the butt joint surfaces of two adjacent arc-shaped guide assemblies, Connecting bolts corresponding one-to-one to each bolt hole in the bolt hole array.

[0014] In some exemplary embodiments of the present invention, based on the above solution, each of the arc-shaped guide components further includes: The contact surface that fits the pile foundation is provided with at least one set of spiral guide protrusions, and the spiral direction of the spiral guide protrusions is the same as the spiral direction of the guide vanes.

[0015] In some exemplary embodiments of the present invention, based on the aforementioned solution, the area of the contact surface increases gradually from the ground end upward along the spiral extension direction of the spiral guide protrusion.

[0016] In some exemplary embodiments of the present invention, based on the above solution, each group of guide vanes includes: The main blade segment has a root connected to the guide surface and extends along the normal direction of the guide surface. The thickness gradually decreases from the root to the free end. In addition, the width of the main blade segment decreases as it extends from one end close to the pile foundation to the other end.

[0017] In some exemplary embodiments of the present invention, based on the above solution, each group of guide vanes further includes: The auxiliary blade segment has a root connected to the guide surface and one end connected to the other end of the main blade segment, and an angle between the auxiliary blade segment and the main blade segment is greater than 90° and less than 180°.

[0018] It can be seen from the above technical solution that the present invention has at least one of the following advantages and positive effects: Through the synergistic effect of the annular guide structure and the guide blades, the present invention can convert vertical wind pressure into horizontal airflow while generating a rotational tightening force, thereby effectively suppressing the dual erosion of horseshoe vortex and wake vortex, and has the significant effect of actively adapting to wind pressure changes and enhancing pile foundation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic structural diagram of an embodiment of a foundation wind erosion prevention device for a desert solar power station according to the present invention; Figure 2 yes Figure 1 Schematic diagram of the assembled structure; Figure 3 This is a schematic structural diagram of another embodiment of the foundation wind erosion prevention device for a desert solar power station according to the present invention; Figure 4 yes Figure 3 Schematic diagram of the three-dimensional structure; Figure 5 It is a structural schematic diagram of another embodiment of the foundation wind erosion protection device for a desert solar power station according to the present invention.

[0021] Description of Reference Numerals 1. Arc-shaped guide assembly; 11. Annular support portion; 12. Guide curved surface; 13. Guide vane; 131. Main blade segment; 132. Auxiliary blade segment; 14. Docking surface; 15. Bolt hole array; 16. Contact surface; 161. Spiral guide protrusion; 2. Pile foundation. DETAILED DESCRIPTION

[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0023] The features, structures or characteristics described above can be combined in one or more embodiments in any suitable manner, and if possible, the features discussed in each embodiment are interchangeable. In the above description, many specific details are provided to provide a full understanding of the embodiments of the present invention. However, it will be appreciated by those skilled in the art that the technical solutions of the present invention can be put into practice without one or more of the specific details, or other methods, components, materials, etc. can be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present invention.

[0024] Although relative terms such as "upper" and "lower" are used herein to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device is flipped upside down, the component described as "upper" would become the component "lower." Other relative terms such as "higher," "lower," "top," "bottom," "front," "back," "left," and "right" have similar meanings. When a structure is "on" another structure, it may mean that the structure is integrally formed on the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through the other structure.

[0025] In the present invention, the terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising", "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.

[0026] In the existing pile foundation protection system for desert solar power stations, wind-blown sand erosion around the piles exhibits a two-stage failure mechanism. Periodic pressure fluctuations caused by vortex shedding cause sand to be continuously drawn into the low-pressure area on the leeward side of the pile foundation, forming erosion pits. The horseshoe vortex effect then causes near-surface airflow to scour the pile base in a three-dimensional spiral pattern, leading to the expansion of an inverted cone-shaped erosion structure. The combined effects of these two mechanisms unbalance the stress distribution at the interface between the pile foundation and the ground, causing a continuous decrease in the shear strength of the soil around the piles.

[0027] For example, in a solar power station with a pile-based array layout, when the wind speed exceeds the critical value, the Reynolds number enters the turbulent region, resulting in a significant increase in the randomness of vortex shedding. At this time, the wake vortex generated by the upstream pile foundation and the flow field around the downstream pile foundation form a superposition effect, which increases the local turbulent kinetic energy to the destruction threshold. The airflow separation point on the windward side of the pile foundation moves forward, causing the spiral trajectory radius of the horseshoe vortex to expand and the scouring depth to increase to more than 1.5 times the diameter of the pile foundation. In this process, sand particles form an annular erosion zone at the root of the pile foundation, resulting in a reduction in the effective burial depth of the pile foundation and a decrease in its anti-overturning moment.

[0028] If these issues are not addressed, the continued expansion of the erosion pits will trigger a chain reaction of damage throughout the pile array. When the bearing capacity of a single pile drops to a certain level, the load sharing ratio between adjacent piles becomes unbalanced, leading to plastic deformation in stress-concentrated areas of the photovoltaic panel support structure. Under extreme conditions, the overall structural stability coefficient of the pile array may fall below the safety threshold, causing the photovoltaic panel tilt angle to deviate beyond the allowable range, thereby affecting power generation efficiency and posing the risk of structural instability.

[0029] When faced with the above problems, the present invention first analyzes the dual mechanism of wind erosion of pile foundations: the periodic low-pressure suction of sand particles caused by vortex shedding, and the three-dimensional spiral scouring effect of horseshoe vortices. Traditional protection methods usually use rigid guard plates or sand barriers, but these structures will change the local flow field morphology, but aggravate the randomness of vortex shedding. In this regard, the present invention considers constructing an annular structure that is coaxial with the pile foundation and can actively guide the airflow, converting the wind pressure direction through streamlined surfaces, and forming a continuous diversion boundary on the surface to block the spiral path of the horseshoe vortex. Further research found that relying solely on a fixed diversion structure is prone to vibration and gaps under strong wind conditions, and it is necessary to introduce a self-tightening mechanism to maintain the fit between the device and the pile foundation. Based on this, the present invention chooses to set inclined blades on the upper part of the diversion surface, and use the wind pressure difference to generate dynamic rotational torque to achieve the effect of the device adaptively compressing the pile foundation.

[0030] Based on this, according to one aspect of the present invention, a foundation anti-wind erosion device for a desert solar power station is provided, referring to Figure 1 As shown, including: The invention comprises a plurality of arc-shaped flow guide components 1, wherein the plurality of arc-shaped flow guide components 1 are combined to form an annular flow guide structure surrounding the pile foundation 2, wherein each of the arc-shaped flow guide components 1 comprises: an annular support portion 11, located at the bottom of each of the arc-shaped diversion components 1, having a diversion plane circumferentially away from the pile foundation 2, wherein the diversion plane contacts the ground surface to form a linear diversion boundary; The guide curved surface 12 is located outside each of the arc-shaped guide components 1, and its longitudinal section is a smooth curve and its bottom is flush with the guide plane or forms a continuous transition surface, and is used to convert vertical wind pressure into horizontal airflow; The guide vanes 13 are obliquely arranged on the upper portion of the guide curved surface 12 and are used to generate a rotational torque through a wind pressure difference to make the foundation wind erosion protection device close to the pile foundation 2 .

[0031] The arc-shaped guide assembly 1 is a curved structure arranged around the pile foundation 2. Specifically, it can be made of segmented lightweight composite materials. Each assembly is spliced together to form a ring, which can divide and guide the airflow direction, reducing the randomness of vortex shedding around the pile foundation 2. The presence of multiple annular guide assemblies facilitates the installation of the foundation wind erosion prevention device of the present invention on existing pile foundations 2, effectively reducing construction difficulty and modification costs.

[0032] The annular support portion 11 refers to a planar structure located at the bottom of the component, which can be made of wear-resistant metal plates or engineering plastics. It contacts the ground to form a continuous boundary, which is used to block sand from entering the root area of the pile foundation 2 and prevent horseshoe vortices from forming a spiral scouring path.

[0033] The guide plane refers to the plane part of the support part away from the pile foundation 2. Specifically, the surface can be smoothed or covered with an anti-wear coating. After contacting the ground, a linear airflow channel is formed to reduce the near-ground wind speed and reduce the suction capacity of sand particles.

[0034] The guide surface 12 refers to the arc-shaped surface on the outside of the component, which can be made of streamlined fiberglass. The curvature of the longitudinal section changes continuously, which can convert the vertical wind pressure into horizontal tangential airflow, weakening the suction strength of the low-pressure area in the center of the vortex.

[0035] The guide vane 13 is an inclined plate-like structure arranged on the upper portion of the curved surface. Specifically, it can be made of aluminum alloy thin plates and arranged in a spiral. The pressure difference between the windward side and the leeward side generates a rotational torque, thereby generating a dynamic compression force between the device and the pile foundation 2.

[0036] The annular support portion 11 can be made of a wear-resistant material to withstand the friction of long-term contact with the ground. The guide surface 12 can be made of a smooth material to reduce airflow resistance. The guide vanes 13 can be made of a lightweight, high-strength material to reduce overall weight while maintaining strength. Each component can be connected using bolts or snaps for easy installation and maintenance.

[0037] The core of this invention lies in its ability to simultaneously address both vortex shedding and horseshoe vortex erosion mechanisms through an annular guide structure. The guide plane blocks the path for sand accumulation, the guide curved surface 12 converts vertical wind pressure into horizontal airflow to weaken vortex suction, and the guide vanes 13 generate self-tightening rotational torque. These three elements form a three-dimensional protective system, comprehensively addressing wind-blown sand erosion from three perspectives: airflow kinetic energy conversion, sealing of the contact surface 16, and dynamic stability.

[0038] The working process and principle of the present invention are as follows: a plurality of arc-shaped guide components 1 are enclosed to form an annular guide structure surrounding the pile foundation 2. Each arc-shaped guide component 1 includes an annular support portion 11, a guide curved surface 12 and a guide vane 13. The annular support portion 11 is located at the bottom of the arc-shaped guide component 1, and has a guide plane circumferentially away from the pile foundation 2, which contacts the ground to form a linear guide boundary. The guide curved surface 12 is located on the outside of the arc-shaped guide component 1, and its longitudinal section is a smooth curve, and its bottom is flush with the guide plane or forms a continuous transition surface. The guide vane 13 is obliquely arranged on the upper part of the guide curved surface 12.

[0039] The guide plane of the annular support portion 11 contacts the ground surface, forming a linear guide boundary, blocking the spiral scouring path of the horseshoe vortex and inhibiting the accumulation of sand at the root of the pile foundation 2. The smooth curve design of the guide surface 12 converts the vertical wind pressure into horizontal airflow, weakening the suction effect of the local low-pressure area caused by vortex shedding on sand particles, guiding the airflow to diffuse in the horizontal direction, and reducing the turbulence intensity. The inclined guide blades 13 use the wind pressure difference to generate rotational torque, dynamically enhancing the contact pressure between the device and the pile foundation 2, preventing the device from detaching from the pile foundation 2 due to wind vibration. At the same time, the rotation disperses the impact energy of the airflow, further suppressing the periodic fluctuations of vortex shedding.

[0040] When sandstorms strike, the guide plane of the annular support 11 guides near-ground airflow, reducing direct impact on the base of the pile foundation 2. The guide curved surface 12 converts vertical wind pressure into horizontal airflow, reducing vortex intensity. The guide vanes 13 generate rotational torque under the action of wind pressure, keeping the entire device in close contact with the pile foundation 2 and enhancing stability.

[0041] In some embodiments, the plurality of arc-shaped flow guide components 1 may be two, referring to Figure 1 and Figure 2 As shown, that is, each arc-shaped guide component 1 is a semicircular ring, and two semicircular rings are spliced to form a ring-shaped guide result surrounding the pile foundation 2. In other embodiments, the plurality of arc-shaped guide components 1 can be three (not shown in the figure), four (refer to Figure 3 Shown and Figure 4 As shown in the figure), five or six (not shown in the figure), etc. Those skilled in the art can make settings according to actual conditions, and the present invention does not make specific limitations.

[0042] Therefore, the present invention can effectively solve the problems of erosion pit formation and reduced structural stability caused by wind and sand erosion in the pile foundation 2 of a desert solar power station. The annular guide structure actively guides the airflow, dissipates the kinetic energy of erosion, and suppresses the influence of the horseshoe vortex effect and vortex shedding. The linear guide boundary formed by the guide plane and the ground surface blocks the spiral scouring path of the horseshoe vortex, reducing the accumulation of sand at the root of the pile foundation 2. The guide surface 12 converts vertical wind pressure into horizontal airflow, weakening the suction effect of the local low-pressure area generated by vortex shedding on sand. The rotational torque generated by the guide blades 13 makes the device fit tightly with the pile foundation 2, thereby improving the stability of the overall structure. This three-dimensional protection system can significantly reduce the formation of erosion pits around the pile foundation 2, maintain the structural stability of the solar power station, extend the service life of the equipment, and reduce maintenance costs.

[0043] Considering that when the overall curvature of the guide surface 12 is fixed, the bottom airflow generates turbulent energy loss due to the large curvature, and the top airflow weakens the horizontal component due to insufficient curvature, the energy conversion efficiency of the overall guide structure is limited. To this end, in some embodiments, the curvature radius of the guide surface 12 can be designed to decrease from bottom to top. This gradual curvature design allows the bottom airflow to form a smooth transition when it contacts the curved surface, avoiding airflow separation or local vortices caused by sudden changes in curvature. As the height increases, the curvature radius gradually decreases, so that the airflow in the upper area accelerates and turns in a more compact arc, thereby enhancing the horizontal component.

[0044] For example, the curvature radius of the bottom of the guide surface 12 can be designed to be set to a range of 500 mm to 1000 mm, and the curvature radius of the top can be adjusted to a range of 200 mm to 500 mm. The larger curvature radius at the bottom allows the airflow to form a smooth transition when it contacts the curved surface. For example, when the curvature radius of the bottom is 800 mm, the angle between the incident angle of the airflow and the tangent is reduced to less than 15 degrees, avoiding airflow separation; when the curvature radius at the top is gradually reduced to 300 mm, the airflow turning angle increases to more than 60 degrees, and the horizontal component force is increased to 75% of the vertical wind pressure. The guide surface 12 is flush with the guide plane or transitions continuously, so that the bottom airflow enters the curved surface area after stabilizing through the linear boundary of the guide plane; the guide blades 13 arranged on the upper part of the guide surface 12 are guided by the curved surface with decreasing curvature, and the pressure difference generated by the accelerated turning of the airflow further increases the rotational torque. Under the synergistic effect of the two, the uniformity of the stress distribution of the curved surface structure is improved by 20%.

[0045] Therefore, the present invention can optimize the flow state of airflow at different heights of the curved surface. A larger curvature radius is used at the bottom, so that the strong wind and sand airflow close to the surface forms a smooth transition when it contacts the curved surface, avoiding airflow peeling or local vortexes caused by sudden changes in curvature. As the height increases, the curvature radius gradually decreases, so that the airflow in the upper area accelerates and turns in a more compact arc, thereby enhancing the horizontal component of force. This gradual curvature design not only ensures the stability of the bottom airflow, but also improves the diversion efficiency of the top airflow, so that the overall energy conversion efficiency of converting vertical wind pressure into horizontal airflow is systematically improved, thereby more effectively weakening the intensity of vortex shedding around the pile foundation 2. At the same time, the continuous transition curved surface structure formed by the decreasing curvature can reduce the risk of local stress concentration and improve the structural reliability of the device in a strong wind and sand environment.

[0046] In some embodiments, the split structure may cause gaps or unevenness at the connection between the guide plane and the guide curved surface 12, affecting the guide effect; at the same time, the split connection is prone to stress concentration under strong wind pressure or sand impact, causing structural fatigue or damage, thereby reducing the device's wind erosion resistance and stability.

[0047] For this purpose, the guide plane and the guide curved surface 12 may be designed to be integrally connected and formed.

[0048] The guide plane and the guide curved surface 12 can be produced as an integral component using methods such as injection molding or compression molding. For example, by selecting high-strength engineering plastic materials and through precision mold design, the contours of the guide plane and the guide curved surface 12 can be formed simultaneously in a single molding process. The guide plane can be designed as a horizontal plane, which contacts the ground surface to form a linear guide boundary. The guide curved surface 12 extends upward from the outer edge of the guide plane to form a smoothly transitioned arc surface. By adjusting the mold parameters, the curvature change of the guide curved surface 12 can be controlled so that it can effectively convert vertical wind pressure into horizontal airflow. The one-piece molding process can ensure the continuity between the guide plane and the guide curved surface 12, eliminate possible seams or uneven areas, thereby enhancing the mechanical strength of the foundation wind erosion prevention device for desert solar power stations, reducing stress concentration points under strong wind pressure or sand impact, and thus improving the durability of the foundation wind erosion prevention device for desert solar power stations.

[0049] Considering the lack of integrated design of guide vanes 13 at the joint surfaces of adjacent components, the airflow guidance between the components may be discontinuous, thereby weakening the efficiency of the guide vanes 13 in utilizing the wind pressure difference. In addition, the structural stability is insufficient, making it difficult to form a coordinated guiding effect.

[0050] In this regard, each of the arc-shaped guide components 1 may be designed to further include a docking surface 14 with an adjacent arc-shaped guide component 1 , and the docking surfaces 14 of two adjacent arc-shaped guide components 1 are spliced to form the guide blade 13 .

[0051] Specifically, during the splicing process, the docking surfaces 14 of adjacent arc-shaped guide assemblies 1 are precisely aligned through shape matching. When wind pressure acts on the guide blades 13, the airflow flows smoothly along the surface of the spliced guide blades 13, which can avoid the generation of turbulence at the joints. The continuous airflow guiding surface makes the wind pressure difference evenly distributed along the length of the guide blades 13, thereby generating a stable rotational torque, prompting the device to cling to the pile foundation 2. Due to the continuity and structural stability of the guide blades 13, the annular guide structure can effectively suppress vortex shedding and the formation of horseshoe vortices, reduce the entrainment of sand particles and the generation of erosion pits. The splicing design also simplifies the installation process. The assembly of the guide blades 13 can be completed by directly splicing the docking surfaces 14, thereby reducing the risk of alignment errors during the installation process and improving the fitting accuracy between the device and the pile foundation 2.

[0052] Considering that the fixing method of the docking surface 14 is non-detachable or rigid, it may lead to difficulties in installation and maintenance, and it is difficult to adapt to the structural adjustment requirements under different working conditions. Therefore, in some embodiments, a detachable connection structure can be designed on the docking surface 14 to fix the annular guide structure.

[0053] The detachable connection structure can achieve horizontal and vertical positioning and locking of adjacent arc-shaped deflector assemblies 1. As one embodiment of the connection method, the detachable connection structure can include a bolt hole array 15 extending through the mating surfaces 14 of two adjacent arc-shaped deflector assemblies 1, and connecting bolts corresponding to each bolt hole in the bolt hole array 15.

[0054] Furthermore, the bolt hole array 15 can be designed to be evenly distributed along the mating surface 14, for example, with bolt holes spaced at regular intervals. The connecting bolts are standard in size and long enough to pass through the mating surfaces 14 of two adjacent arc-shaped deflector assemblies 1. During installation, the mating surfaces 14 of adjacent arc-shaped deflector assemblies 1 are aligned, and the connecting bolts are inserted through the bolt holes and tightened, thereby achieving a secure connection between the arc-shaped deflector assemblies 1. During disassembly, the arc-shaped deflector assemblies 1 can be separated by simply loosening and removing the connecting bolts.

[0055] When strong wind loads act on the guide surface 12, the shear force generated by the lateral wind pressure is shared by multiple connecting bolts, and the shear stress borne by a single connecting bolt is dispersed to the entire array. The regular arrangement of the bolt hole array 15 allows the small displacement of the docking surface 14 under a vibration environment to be suppressed by the composite constraints of multiple connecting bolts. For example, when a certain connecting bolt undergoes elastic deformation due to dynamic loads, the adjacent connecting bolts generate a reverse force through contact with the hole wall, preventing the displacement from further expanding. The axial tension of the connecting bolt offsets the vertical vibration through the friction resistance between the thread and the bolt hole, avoiding the separation of the arc-shaped guide assembly 1 due to alternating loads. As a result, the splicing surface of the guide blade 13 maintains the continuity of the aerodynamic contour under the impact of wind and sand, preventing the airflow separation caused by local deformation from exacerbating the erosion effect.

[0056] The through-bolt hole array 15 ensures uniform force distribution within the connecting bolts in three dimensions, avoiding localized stress concentration. The synergistic action of multiple connecting bolts creates a composite constraint that effectively suppresses the minute displacements of the mating surface 14 that may occur under the impact of wind and sand. This connection method can both withstand the shear forces generated by lateral wind pressure in desert environments and the tensile forces caused by vertical vibrations, thereby ensuring the integrity of the guide structure under dynamic wind loads and improving the aerodynamic integrity and wind erosion protection of the guide vanes 13.

[0057] In some embodiments, under the action of the rotational torque, the contact surface 16 between the device and the pile foundation 2 may slide relative to each other due to insufficient friction or uneven contact, resulting in the device being unable to stably fit the pile foundation 2, thereby affecting the anti-wind erosion effect.

[0058] Therefore, reference Figure 5 As shown, each of the arc-shaped guide components 1 can be designed to further include a contact surface 16 that fits the pile foundation 2 , on which at least one set of spiral guide protrusions 161 is provided, and the spiral direction of the spiral guide protrusions 161 is the same as the spiral direction of the guide blades 13 .

[0059] Contact surface 16 directly contacts the surface of pile foundation 2, providing support for spiral guide protrusion 161. The spiral direction of spiral guide protrusion 161 aligns with that of guide vane 13, so that when wind forces the guide vane 13 to rotate, spiral guide protrusion 161 forms a spiral path along the surface of pile foundation 2. Specifically, when wind forces the guide vane 13 to generate a rotational torque, spiral guide protrusion 161 is guided by the direction of rotation, forcing the device to move in a spiral path along the surface of pile foundation 2. Because spiral guide protrusion 161 rotates in sync with the direction of guide vane 13, the device can only rotate downward along pile foundation 2 under wind pressure and cannot slide in the opposite direction. The contact surface 16 and spiral guide protrusion 161 work together to gradually increase the contact pressure between the device and pile foundation 2 as it rotates. Simultaneously, the spiral motion continuously updates the frictional contact area between contact surface 16 and pile foundation 2, preventing detachment caused by localized wear. As a result, the device maintains close contact with the surface of pile foundation 2 during dynamic rotation and moves downward to the bottom of the pile foundation 2, effectively covering sandy areas and preventing wind and sand erosion.

[0060] However, when the spiral guide protrusion 161 spirally extends along the surface of the pile foundation 2, the contact area of the contact surface 16 is unevenly distributed, which will cause an imbalance in the distribution of friction between the device and the pile foundation 2 during rotation, and may cause local stress concentration or loose fitting problems, affecting the overall wind erosion resistance of the device.

[0061] To address this issue, the area of the contact surface 16 can also be designed to increase from the ground end upward along the spiral extension direction of the spiral guide protrusion 161. For example, the contact surface 16 can be divided into multiple discrete regions arranged along the spiral direction, with the area of each region increasing at a preset ratio. The spiral extension direction of the spiral guide protrusion 161 is consistent with the spiral direction of the guide vane 13, so that the rotational torque transmission path coincides with the pressure distribution direction of the contact surface 16, avoiding frictional resistance offset due to directional deviation.

[0062] Specifically, when wind pressure drives the guide vanes 13 to generate rotational torque, the smaller contact area at the ground end reduces the initial contact pressure, effectively reducing starting resistance. As the device rises along the spiral path, the corresponding contact pressure gradually increases with each increase in contact area. This pressure gradient distribution allows the lower region of the device to prioritize initial contact with the pile foundation 2 during rotation, while the upper region forms a progressive compression by increasing the contact area. The spiral layout of the spiral guide protrusions 161 and the guide vanes 13 in the same direction ensures that the tangential component of the rotational torque always maintains an orthogonal relationship with the normal component of the friction force of the contact surface 16, avoiding offset caused by lateral force components. The gradient of the area change of the contact surface 16 matches the torque output curve of the guide vane 13. For example, when the guide vane 13 outputs a torque of 50 N·m at a wind speed of 8 m / s, the area of the top region of the contact surface 16 is configured to generate a static friction torque of no less than 60 N·m, forming an overload protection mechanism. This design is used in the foundation wind erosion protection device of the desert solar power station. Under the action of dynamic wind load, the contact pressure distribution and rotational torque are adaptively balanced to eliminate local stress concentration.

[0063] The guide blades 13 generate a rotational torque through the wind pressure difference to make the device close to the pile foundation 2. However, due to the unstable turbulent characteristics of the wind and sand flow in the desert environment, the guide blades 13 are prone to stress concentration when subjected to complex wind loads, resulting in blade root breakage or a decrease in the overall guide efficiency; at the same time, the traditional equal-thickness blade structure is difficult to adapt to the wind speed differences at different heights, resulting in insufficient guide effect in local areas and inability to effectively suppress vortex shedding and horseshoe vortex effect.

[0064] In this regard, a main blade segment 131 can also be designed, the root of which is connected to the guide surface 12, extending along the normal direction of the guide surface 12, and the thickness gradually decreases from the root to the free end. In addition, the width of the main blade segment 131 decreases as it extends from one end close to the pile foundation 2 to the other end.

[0065] The main blade segment 131's root connects to the guide surface 12, and its thickness tapers from the root toward the free end. This design improves the uneven stress distribution experienced by conventional uniform-thickness blades under complex wind loads. When the unstable turbulence of wind and sand flows impacts the blades, this gradually varying thickness structure more effectively disperses stress, preventing excessive stress concentration at the blade root. This effectively reduces the risk of blade root fracture and significantly improves the structural reliability and service life of the guide vane 13.

[0066] The main blade segment 131 tapers in width from one end near the pile foundation 2 toward the other, optimizing for varying wind speeds at different altitudes in desert environments. Near the pile foundation 2, where wind speeds are relatively low, the wider blades provide ample bearing surface area, ensuring sufficient rotational torque to maintain close contact with the pile foundation 2. As wind speeds increase with altitude, the decreasing width reduces the wind load on the blades at high wind speeds, preventing deformation or damage to the blades due to excessive wind loads. This effectively guides wind and sand flows at varying altitudes.

[0067] Since the wind and sand flow in the desert environment has unstable turbulent characteristics, the guide blade 13 is prone to stress concentration when subjected to complex wind loads, resulting in blade root breakage or a decrease in overall guide efficiency; at the same time, the traditional equal-thickness blade structure is difficult to adapt to the wind speed differences at different heights, resulting in insufficient guide effect in local areas and inability to effectively suppress vortex shedding and horseshoe vortex effects.

[0068] In this regard, each group of guide blades 13 may be further designed to include: The auxiliary blade segment 132 has its root connected to the guide curved surface 12 and one end connected to the other end of the main blade segment 131 , and an angle α at the connection between the auxiliary blade segment 132 and the main blade segment 131 is greater than 90° and less than 180°.

[0069] The angle α at which the root of the auxiliary blade segment 132 connects to the main blade segment 131 can be controlled within a range of 100° to 130°, for example, 120°. Under the complex wind loads of a sandstorm, this structure disperses stress to the connection between the two blade segments and the surrounding area, preventing excessive stress concentration at the blade root. This significantly reduces the risk of blade root fracture, extends the service life of the guide vane 13, and ensures the long-term stable operation of the guide vane facility in desert sandstorm environments.

[0070] The auxiliary blade segment 132 can change the position of the airflow separation point, reduce the formation and intensity of the vortex, reduce the impact and energy loss of the vortex on the guide blade 13, thereby improving the aerodynamic performance of the entire guide process and reducing the energy loss and equipment vibration caused by the vortex effect.

[0071] Compared to traditional blades of uniform thickness, the combined structure of auxiliary blade segment 132 and main blade segment 131 better adapts to varying wind speeds at different heights. By rationally adjusting the angles and shapes of the two blade segments, flow guidance can be optimized for airflow characteristics at different heights, ensuring smoother airflow through the blades. This effectively addresses insufficient flow guidance in certain areas, improves overall flow guidance efficiency, and ensures the effectiveness of desert sand control projects.

[0072] It should be understood that the present invention is not limited in its application to the detailed structure and arrangement of the components proposed by the present invention. The present invention is capable of other embodiments and can be implemented and carried out in a variety of ways. The aforementioned variations and modifications fall within the scope of the present invention. It should be understood that the invention disclosed and defined herein extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All of these different combinations constitute multiple alternative aspects of the present invention. The embodiments described herein illustrate the best mode known for implementing the invention and will enable those skilled in the art to utilize the invention.

Claims

1. A foundation wind erosion prevention device for a desert solar power station, characterized in that: The invention comprises a plurality of arc-shaped flow guide components, wherein the plurality of arc-shaped flow guide components enclose a ring-shaped flow guide structure surrounding the pile foundation, wherein each of the arc-shaped flow guide components comprises: an annular support portion, located at the bottom of each of the arc-shaped diversion components, having a diversion plane circumferentially away from the pile foundation, wherein the diversion plane contacts the ground surface to form a linear diversion boundary; A guide curved surface, located outside each of the arc-shaped guide components, has a smooth longitudinal section and a bottom that is flush with the guide plane or forms a continuous transition surface, and is used to convert vertical wind pressure into horizontal airflow; The guide vanes are obliquely arranged on the upper portion of the guide curved surface and are used to generate a rotational torque through a wind pressure difference so as to make the foundation wind erosion protection device close to the pile foundation.

2. The foundation anti-wind erosion device for a desert solar power station according to claim 1, characterized in that: The curvature radius of the guide curved surface decreases from bottom to top.

3. The foundation anti-wind erosion device for a desert solar power station according to claim 1, characterized in that: The guide plane and the guide curved surface are integrally connected and formed.

4. The foundation anti-wind erosion device for a desert solar power station according to claim 1, characterized in that: Each of the arc-shaped guide components further includes: The butt joint surfaces of two adjacent arc-shaped guide assemblies are spliced together to form the guide blade.

5. The foundation anti-wind erosion device for a desert solar power station according to claim 4, characterized in that: The docking surface is provided with a detachable connection structure for fixing the annular flow guide structure.

6. The foundation anti-wind erosion device for a desert solar power station according to claim 5, characterized in that: The detachable connection structure comprises: An array of bolt holes passing through the butt joint surfaces of two adjacent arc-shaped guide assemblies, Connecting bolts corresponding one-to-one to each bolt hole in the bolt hole array.

7. The foundation anti-wind erosion device for a desert solar power station according to claim 1, characterized in that: Each of the arc-shaped guide components further includes: The contact surface that fits the pile foundation is provided with at least one set of spiral guide protrusions, and the spiral direction of the spiral guide protrusions is the same as the spiral direction of the guide vanes.

8. The foundation anti-wind erosion device for a desert solar power station according to claim 7, characterized in that: The area of the contact surface increases gradually from the ground end upwards along the spiral extension direction of the spiral guide protrusion.

9. The foundation anti-wind erosion device for a desert solar power station according to any one of claims 1 to 8, characterized in that: Each group of guide vanes includes: The main blade segment has a root connected to the guide surface and extends along the normal direction of the guide surface. The thickness gradually decreases from the root to the free end. In addition, the width of the main blade segment decreases as it extends from one end close to the pile foundation to the other end.

10. The foundation anti-wind erosion device for a desert solar power station according to claim 9, characterized in that: Each group of guide blades further includes: The auxiliary blade segment has a root connected to the guide surface and one end connected to the other end of the main blade segment, and an angle between the auxiliary blade segment and the main blade segment is greater than 90° and less than 180°.

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