A type of earthquake-resistant wind power generation tower

Abstract

This invention discloses an earthquake-resistant wind power generation tower, belonging to the field of wind power generation technology. It includes a foundation, on which several cylindrical sections are sequentially arranged, with adjacent sections slidingly connected horizontally. A generator set is mounted on the top section, and the bottom section is fixedly connected to the ground. A base column coaxial with the cylindrical sections is fixed to the foundation. The base column comprises several horizontally slidingly connected columns, with several connecting rods fixed between each column and the interior of the cylindrical sections. Prestressed tendons are fixed between the bottom and top columns, and these tendons sequentially penetrate the remaining columns. Several first auxiliary reset devices are provided between adjacent cylindrical sections, and several second auxiliary reset devices are provided between adjacent columns. The purpose is to address the problem of low earthquake resistance in existing wind power generation towers.

Description

Technical Field

[0001] This invention belongs to the field of wind power generation technology, specifically relating to an earthquake-resistant wind power generation tower. Background Technology

[0002] As a crucial supporting structure for wind turbines, the stability of the wind turbine tower significantly impacts the safety performance of the turbine. Furthermore, the higher the altitude from the ground to the sky, the stronger the wind in the area, and the greater the amount of electrical energy that can be converted. Therefore, to achieve higher power generation, the higher the location of the wind turbine, the more wind energy can be utilized.

[0003] However, the higher the wind turbine tower, the greater the impact of earthquake disasters. Furthermore, the existing wind turbine towers are not designed with seismic performance in mind, resulting in low seismic performance. Summary of the Invention

[0004] In view of this, the present invention discloses an earthquake-resistant wind power generation tower, the purpose of which is to address the problem of low earthquake resistance of existing wind power generation towers.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An earthquake-resistant wind turbine tower includes a base platform on which several cylindrical sections are sequentially arranged, with adjacent sections horizontally slidably connected. A generator set is mounted on the top section, and the bottom section is fixedly connected to the ground. A base column coaxial with the cylindrical sections is fixed to the base platform. The base column comprises several sections of columns horizontally slidably connected to each other. Several connecting rods are fixed between each column and the interior of the cylindrical sections. Prestressed tendons are fixed between the bottom and top columns, and the prestressed tendons sequentially penetrate the remaining columns. Several first auxiliary reset devices are provided between adjacent cylindrical sections, and several second auxiliary reset devices are provided between adjacent columns.

[0007] In this design, the wind turbine tower is divided into several sections and installed using a modular assembly method, which is simple and quick. Simultaneously, the prestressed tendons pass through each column, with both ends of the tendons fixedly connected to the bottom and top columns, respectively. When subjected to lateral seismic forces, the tower moves horizontally, which in turn acts on the prestressed tendons. The prestressed tendons deform under stress, thus playing a role in vibration damping and energy dissipation. Furthermore, the good self-resetting properties and energy dissipation capacity of the prestressed tendons help the tower return to its original position. In addition, a first auxiliary resetting device and a second auxiliary resetting device assist in the resetting of the main body and the tower, preventing the tower from tilting due to earthquake displacement.

[0008] Furthermore, the first auxiliary reset device includes a connecting shaft disposed at the bottom of the cylinder, and a plurality of cavities facing the connecting shaft are opened at the top of the cylinder. A base is rotatably connected to the center of the cavity, and a rotation damper for reset is disposed between the base and the cavity. Guide rails are fixed on both sides of the base, and a sliding groove communicating with the guide rails at the center of the upper end of the base is disposed. The connecting shaft is slidably connected in the corresponding sliding groove, and a hydraulic buffer device facing the connecting shaft is disposed on the guide rail.

[0009] When the cylinder moves horizontally due to vibration, the cylinder drives the connecting shaft to slide on the base, causing the base to deflect until the slide and guide rail are parallel to the displacement direction of the cylinder. Under the action of earthquake, the connecting shaft reciprocates on the guide rail and base, and the hydraulic buffer device buffers and dissipates energy, which reduces the vibration and displacement of the cylinder and also helps the cylinder to return to its original position. The slide and guide rail being parallel to the displacement direction of the cylinder can adapt to vibrations in any horizontal direction, greatly improving the adaptability and maximizing the seismic performance of the wind power generation tower.

[0010] Furthermore, connecting cavities are provided on both sides of the slide groove, and each connecting cavity is equipped with a hydraulic cylinder facing the connecting shaft. Each hydraulic cylinder has an arc-shaped limiting block at its end. A limiting groove that cooperates with the limiting block is provided on the periphery of the connecting shaft. A vibration sensor is provided on the cylinder body, and a controller for controlling the opening and closing of the hydraulic cylinder is provided on the vibration sensor.

[0011] When the vibration sensor does not detect vibration, the controller controls the hydraulic cylinder to remain extended, using a limit block to lock within the limit groove, thereby limiting and fixing the connecting shaft, strengthening the connection stability between adjacent cylinders, and preventing the wind turbine tower from tilting due to displacement between cylinders. When the vibration sensor detects horizontal vibration, the controller controls the hydraulic cylinder to remain contracted, causing the limit block to disengage from the limit groove, thereby releasing the limit on the connecting shaft, causing the cylinder to undergo horizontal displacement with the vibration, triggering the subsequent energy dissipation and vibration reduction process, and improving the seismic performance of the wind turbine tower.

[0012] Furthermore, an auxiliary support structure parallel to the guide rail is provided between the cavity and the guide rail. The auxiliary support structure includes a fixed rod and a movable rod that is slidably connected to the end of the fixed rod. The end of the fixed rod is rotatably connected to the end of the cavity. The end of the movable rod is fixedly connected to a rotating shaft. A guide groove is provided parallel to the bottom of the guide rail. The rotating shaft is slidably connected to the corresponding guide groove.

[0013] When the base drives the guide rail to deflect, the guide rail drives the rotating shaft to slide in the guide groove. This, combined with the relative sliding between the moving rod and the fixed rod, and the deflection of the auxiliary support structure along the end of the fixed rod, maintains the connection between the auxiliary support structure and the guide rail, thereby maintaining the support function of the guide rail and preventing the guide rail from bending under the force of the cylinder, which would prevent the cylinder from returning to its normal position.

[0014] Furthermore, the second auxiliary reset device includes an annular reset seat disposed on the top of the main body, an annular groove being formed on the inner wall of the reset seat, an annular connecting block being disposed at the bottom of the main body, the connecting block being horizontally slidably connected in the annular groove, and a plurality of horizontally inclined reset rods being disposed around the periphery of the reset seat, the reset rods being telescopic structures, the other end of the reset rods being hinged to the side wall of the annular groove, and an elastic reset element being disposed between the middle of the reset rod and the side wall of the annular groove.

[0015] The engagement between the annular groove and the connecting block ensures that adjacent columns can only move horizontally in any direction, preventing separation. Simultaneously, the column is fixedly connected to the cylinder via a connecting rod, providing support while also restricting horizontal displacement and preventing separation. During horizontal displacement, the column causes the connecting block to move horizontally within the annular groove. The connecting block then deflects the reset rod, which dissipates energy by stretching or compressing the elastic reset component, reducing the column's displacement distance and aiding in its reset.

[0016] Furthermore, a friction layer is provided between the adjacent columns and the adjacent cylinders.

[0017] Furthermore, a flexible windbreak plate is hinged to the outside of the cavity, and a torsion spring is provided at the hinge.

[0018] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0019] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0021] Figure 2 This is a longitudinal sectional view of an embodiment of the present invention;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a cross-sectional view of the reset seat in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure after the base is deflected in an embodiment of the present invention.

[0025] The following components are marked in the attached diagram: 1. Foundation; 2. Cylinder; 3. Column; 4. Connecting rod; 5. Prestressed tendon; 6. Connecting shaft; 7. Base; 8. Guide rail; 9. Through groove; 10. Hydraulic damper; 11. Hydraulic cylinder; 12. Limiting block; 13. Fixing rod; 14. Moving rod; 15. Reset seat; 16. Ring block; 17. Reset rod; 18. Elastic reset component; 19. Wind baffle. Detailed Implementation

[0026] like Figures 1-5 As shown:

[0027] An earthquake-resistant wind turbine tower includes a base 1, on which several sections of cylindrical body 2 are sequentially arranged. Adjacent cylindrical bodies 2 are horizontally slidably connected. A generator set (not shown in the figure) is installed on the top cylindrical body 2, and the bottom cylindrical body 2 is fixedly connected to the ground. The base 1 is fixed with a base column coaxial with the cylindrical body 2. The base column includes several sections of column 3 that are horizontally slidably connected to each other. Several connecting rods 4 are fixed between the column 3 and the interior of the cylindrical body 2. Prestressing tendons 5 are fixed between the bottom column 3 and the top column 3. The prestressing tendons 5 sequentially penetrate the remaining column 3. Several first auxiliary reset devices are provided between adjacent cylindrical bodies 2, and several second auxiliary reset devices are provided between adjacent column 3.

[0028] In this design, the wind turbine tower is divided into several sections 2 and installed using a modular assembly method, which is simple and quick. Simultaneously, the prestressing tendons 5 pass through each column 3, with both ends of the tendons 5 fixedly connected to the bottom and top columns 3, respectively. When subjected to lateral seismic forces, the tower 2 moves horizontally, thus acting on the prestressing tendons 5. The prestressing tendons 5 deform under stress, which can play a role in shock absorption and energy dissipation. Furthermore, the good self-resetting properties and energy dissipation capacity of the prestressing tendons 5 help the tower 2 to return to its original position. In addition, a first auxiliary resetting device and a second auxiliary resetting device are used to assist in the resetting of the main body and the tower 2, preventing the tower 2 from tilting due to earthquake displacement.

[0029] In this embodiment, the first auxiliary reset device includes a connecting shaft 6 disposed at the bottom of the cylinder 2. The top of the cylinder 2 has several cavities facing the connecting shaft 6. A base 7 is rotatably connected to the center of the cavity. A rotation damper for reset is disposed between the base 7 and the cavity. Guide rails 8 are fixed on both sides of the base 7. A sliding groove communicating with the guide rails 8 is disposed at the center of the upper end of the base 7. The connecting shaft 6 is slidably connected in the corresponding sliding groove. A hydraulic buffer device facing the connecting shaft 6 is disposed on the guide rail 8.

[0030] When the cylinder 2 moves horizontally due to vibration, the cylinder 2 drives the connecting shaft 6 to slide on the base 7 and causes the base 7 to deflect until the slide groove and guide rail 8 are parallel to the displacement direction of the cylinder 2. Under the action of earthquake, the connecting shaft 6 reciprocates on the guide rail 8 and base 7, and the hydraulic buffer device buffers and dissipates energy, which reduces the vibration and displacement of the cylinder 2 and also helps the cylinder 2 to return to its original position. The slide groove and guide rail 8 are parallel to the displacement direction of the cylinder 2, which can adapt to vibration in any horizontal direction, greatly improving the adaptability and maximizing the seismic performance of the wind power generation tower.

[0031] In this embodiment, connecting cavities are provided on both sides of the slide groove, and each connecting cavity is provided with a hydraulic cylinder 11 facing the connecting shaft 6. Each hydraulic cylinder 11 has an arc-shaped limiting block 12 at its end. The connecting shaft 6 has a limiting groove that cooperates with the limiting block 12 on its periphery. A vibration sensor (a conventional technique for those skilled in the art, so not shown in the figure) is provided on the cylinder 2, and a controller for controlling the opening and closing of the hydraulic cylinder 11 (a conventional technique for those skilled in the art, so not shown in the figure) is provided on the vibration sensor.

[0032] When the vibration sensor does not detect vibration, the controller controls the hydraulic cylinder 11 to remain extended, and the limiting block 12 engages with the limiting groove, thereby limiting and fixing the connecting shaft 6, strengthening the connection stability between adjacent cylinders 2, and preventing the wind turbine tower from tilting due to displacement between cylinders 2; when the vibration sensor detects horizontal vibration, the controller controls the hydraulic cylinder 11 to remain contracted, driving the limiting block 12 to disengage from the limiting groove, thereby releasing the limiting of the connecting shaft 6, causing the cylinder 2 to undergo horizontal displacement with the vibration, triggering the subsequent energy dissipation and vibration reduction process, and improving the seismic performance of the wind turbine tower.

[0033] In this embodiment, an auxiliary support structure parallel to the guide rail 8 is provided between the cavity and the guide rail 8. The auxiliary support structure includes a fixed rod 13 and a movable rod 14 that is slidably connected to the end of the fixed rod 13. The end of the fixed rod 13 is rotatably connected to the end of the cavity. The end of the movable rod 14 is fixedly connected to a rotating shaft. A guide groove (not shown in the figure) is provided parallel to the bottom of the guide rail 8. The rotating shaft (not shown in the figure) is slidably connected to the corresponding guide groove.

[0034] When the base 7 drives the guide rail 8 to deflect, the guide rail 8 drives the rotating shaft to slide in the guide groove. This, combined with the relative sliding between the moving rod 14 and the fixed rod 13 and the deflection of the auxiliary support structure along the end of the fixed rod 13, maintains the connection between the auxiliary support structure and the guide rail 8, thereby maintaining the support function of the guide rail 8 and preventing the guide rail 8 from bending under the force of the cylinder 2, which would cause the cylinder 2 to fail to reset properly.

[0035] In this embodiment, the second auxiliary reset device includes an annular reset seat 15 disposed on the top of the main body. An annular groove is formed on the inner wall of the reset seat 15. An annular connecting block is disposed at the bottom of the main body. The connecting block is horizontally slidably connected in the annular groove. Several horizontally inclined reset rods 17 are disposed around the reset seat 15. The reset rods 17 are telescopic structures. The other end of the reset rods 17 is hinged to the side wall of the annular groove. An elastic reset element 18 is disposed between the middle of the reset rods 17 and the side wall of the annular groove. In this embodiment, the elastic reset element 18 is a spring.

[0036] The engagement between the annular groove and the connecting block ensures that adjacent columns 3 can only move horizontally in any direction, preventing separation. Simultaneously, the column 3 is fixedly connected to the cylinder 2 via the connecting rod 4, providing support for the cylinder 2 while also restricting its horizontal movement to prevent separation. When the column 3 moves horizontally, it causes the connecting block to move horizontally within the annular groove. The connecting block then causes the reset rod 17 to deflect, and the reset rod 17 dissipates energy by stretching or compressing the elastic reset member 18, reducing the displacement distance of the column 3 and aiding in its reset.

[0037] In this embodiment, a friction layer is provided between the adjacent column 3 and the adjacent cylinder 2; by providing the friction layer, the wear between the column 3 and the cylinder 2 is reduced.

[0038] In this embodiment, a flexible wind baffle 19 is hinged to the outside of the concave cavity, and a torsion spring is provided at the hinge. The wind baffle 19, which is hinged, can seal the concave cavity without affecting the deflection of the guide rail 8, so as to prevent wind from blowing into the cavity and causing vibration, which would affect the wind resistance performance of the tower.

[0039] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A seismic-resistant wind power generation tower, comprising a foundation, wherein a plurality of cylindrical sections are sequentially arranged on the foundation, adjacent cylindrical sections are horizontally slidably connected, a generator set is arranged on the top cylindrical section, and the bottom cylindrical section is fixedly connected to the ground, characterized in that: The base column coaxial with the cylinder is fixed, the base column includes a plurality of column bodies connected with each other horizontally and slidably, a plurality of connecting rods are fixed between the column bodies and the inside of the cylinder, prestressed tendons are fixed between the column body at the bottom and the column body at the top, and the prestressed tendons penetrate the remaining column bodies in sequence; a plurality of first auxiliary reset devices are arranged between adjacent cylinder bodies, and a plurality of second auxiliary reset devices are arranged between adjacent column bodies; the first auxiliary reset device includes a connecting shaft arranged at the bottom of the cylinder, a plurality of cavities facing the connecting shaft are formed at the top end of the cylinder, a base is rotatably connected to the middle part of the cavity, and a rotary damper for resetting is arranged between the base and the cavity; guide rails are fixed on both sides of the base, a sliding groove in communication with the guide rails at both ends is arranged at the center of the upper end of the base; the connecting shaft is slidably connected in the corresponding sliding groove, a hydraulic buffer device facing the connecting shaft is arranged on the guide rail; a connecting cavity is formed in the sidewall of the sliding groove, a hydraulic cylinder facing the connecting shaft is arranged in the connecting cavity, an arc-shaped limiting block is arranged at the end of the hydraulic cylinder, a limiting groove matched with the limiting block is formed in the circumferential side of the connecting shaft, a vibration sensor is arranged on the cylinder, and a controller for controlling the opening and closing of the hydraulic cylinder is arranged on the vibration sensor; an auxiliary support structure parallel to the guide rail is arranged between the cavity and the guide rail, the auxiliary support structure includes a fixed rod and a movable rod slidably connected with the end of the fixed rod, the end of the fixed rod is rotatably connected to the end of the cavity, the end of the movable rod is fixedly connected with a rotating shaft, a guide groove is parallelly arranged at the bottom of the guide rail, and the rotating shaft is slidably connected with the corresponding guide groove; the second auxiliary reset device includes an annular reset seat arranged at the top of the main body, an annular groove is formed in the inner wall of the reset seat, an annular connecting block is arranged at the bottom of the main body and slidably connected in the annular groove, a plurality of reset rods are arranged on the circumferential side of the reset seat and horizontally and obliquely arranged, the reset rods are of telescopic structure, the other end of the reset rod is hinged to the sidewall of the annular groove, and an elastic reset member is arranged between the middle part of the reset rod and the sidewall of the annular groove.

2. The anti-seismic wind power tower cylinder according to claim 1, characterized in that: Friction layers are arranged between the adjacent column bodies and the adjacent cylinder bodies.

3. The anti-seismic wind power tower cylinder according to claim 2, characterized in that: A flexible wind shield is hinged to the outside of the cavity, and a torsional spring is arranged at the hinge.

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