A type of wind turbine tower with variable cross-section

Abstract

This invention discloses a variable cross-section wind turbine tower, relating to the field of wind turbine towers. It includes a tower body, a base, and a power generation mechanism. The tower body is mounted on the base, and its diameter gradually decreases from bottom to top. The tower bodies are assembled to form the tower body. This variable cross-section wind turbine tower employs a support and positioning mechanism. During the assembly of two tower bodies, the support and positioning of the tower body is achieved by adjusting an arc-shaped positioning plate, ensuring that the central axes of the two tower bodies coincide. Combined with a linked elastic locking mechanism, when misalignment occurs in the threaded holes on the flanges of the two tower bodies, a rotational force is applied to the hoisted tower body, causing a small-angle deflection until the positioning rod engages with the positioning slot, thus achieving alignment and positioning of the threaded holes. This eliminates the need for cumbersome manual adjustments, ensuring both safety and significantly improving installation efficiency.

Description

Technical Field

[0001] This invention relates to the field of wind turbine tower technology, specifically a wind turbine tower with a variable cross-section. Background Technology

[0002] With the development of society, wind power is widely used as a renewable energy source at present. The wind power generation device is mainly composed of a tower body and a power generation mechanism assembled by tower sections. The tower section serves as the supporting structure of the entire wind power generation device, providing a basic guarantee for the stable operation of the wind power generation device.

[0003] Existing wind power generation towers are mainly cylindrical structures with variable cross-sections whose diameter gradually decreases from bottom to top. When assembling multiple towers, the tower assembly requires high-altitude hoisting by cranes, making it difficult to control the alignment of the two towers. This necessitates cumbersome adjustments to align the two towers, resulting in a significant time consumption during assembly and greatly impacting the efficiency of tower splicing. Summary of the Invention

[0004] The purpose of this invention is to provide a wind turbine tower with a variable cross-section to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a variable cross-section wind turbine tower, comprising a tower body, a base, and a power generation mechanism. The tower body is mounted on the base, and the diameter of the tower body gradually decreases from bottom to top. The tower body is assembled to form a tower body. A power generation mechanism is mounted on the upper end of the tower body. A workbench is fixed inside the tower body. An anti-seismic mechanism is mounted on the lower side of the workbench. A drive mechanism is mounted on the workbench. The drive mechanism is connected to a positioning mechanism. The positioning mechanism includes a support frame. The support frame is slidably connected to the tower body, and the support frame has a cross-shaped structure. A movable frame is slidably connected to the support frame. A bracket is fixed on the movable frame. The bracket contacts and slides with an arc-shaped positioning plate. Four sets of arc-shaped positioning plates are arranged at equal angles. The arc-shaped positioning plates contact the inner wall of the tower body to achieve positioning. An installation frame is provided on the side of the movable frame. A positioning rod is connected to the installation frame by a bearing. The positioning rod engages with a positioning slot to achieve positioning.

[0006] Preferably, the inner flanges are fixed on both the upper and lower sides of the inner side of the tower body, and the inner flanges are provided with threaded holes at equal angles. The inner flanges are also provided with positioning slots at equal angles, and the positioning slots correspond one-to-one with the threaded holes. A staircase is fixedly installed inside the tower body. The inner flanges and threaded holes are fitted with bolts and nuts, which can provide a basic guarantee for locking and fixing the two tower bodies.

[0007] Preferably, the anti-seismic mechanism includes a fixed rod, the upper end of which is fixed to the workbench, and the lower end of which is fixed with a mounting ring. The fixed rod provides fixed support for the mounting ring, ensuring its stability.

[0008] Preferably, a spring damper is fixed at equal angles on the inner side of the mounting ring, and a rolling ball is installed at the end of the spring damper. The ball contacts the gravity block, and the movement of the gravity block can be buffered by the spring damper, thereby realizing the seismic resistance of the tower body and ensuring the stability of the tower body. In addition, the rolling action between the ball and the gravity block can ensure that the force generated by the gravity block is stably applied to the spring damper.

[0009] Preferably, the upper end of the gravity block is fixed to one end of the steel cable, and the other end of the steel cable is fixed to the workbench. The central axis of the gravity block coincides with the central axis of the workbench. When the tower body sways due to the action of external wind, the gravity block swings and applies a force to the spring damper, thereby causing the spring damper to move and generate damping force, which gradually weakens the vibration generated by the tower body and the gravity block, ensuring the stability of the tower body.

[0010] Preferably, the drive mechanism includes a hydraulic oil tank, which is fixed on the workbench. The hydraulic oil tank is connected to the hydraulic rod via a conduit and an oil pump. The hydraulic rod is fixedly connected to the workbench and connected to the support frame via a bearing. The hydraulic rod provides a basic force for positioning the two tower bodies, thus facilitating the precise alignment and installation of the two tower bodies.

[0011] Preferably, the output end of the hydraulic rod is fixed with a drive motor, and the output end of the drive motor is fixed with a fixing plate. The fixing plate is rotatably connected to one end of the connecting rod, while the other end of the connecting rod is rotatably connected to the movable frame. The connecting rod and the movable frame are distributed in a one-to-one correspondence. By moving the fixing plate up and down, combined with the transmission action of the connecting rod, a basic force can be provided for the movement of the movable frame. In addition, combined with the action of the drive motor, a force can be provided for the rotation of the tower body.

[0012] Preferably, the arc-shaped positioning plate and the positioning rod are distributed in a one-to-one correspondence, and the surface of the arc-shaped positioning plate in contact with the inner wall of the tower body has a rough structure. The rough structure of the surface of the arc-shaped positioning plate can effectively ensure the friction between the arc-shaped positioning plate and the tower body, thereby providing a basic guarantee for realizing the rotational fine adjustment of the tower body.

[0013] Preferably, a vertical rod is fixed to the arc-shaped positioning plate, and the vertical rod is slidably connected to the bracket. A first spring is also fixed between the vertical rod and the bracket. The sliding action between the vertical rod and the bracket can provide a basic guarantee for the movement of the arc-shaped positioning plate. Combined with the elastic action of the first spring, it can provide a basic guarantee for the automatic reset of the arc-shaped positioning plate.

[0014] Preferably, a sliding rod is fixed on the mounting bracket, and the sliding rod is slidably connected to the movable bracket. A second spring is also fixed between the sliding rod and the movable bracket. When the mounting bracket moves, the sliding guide action between the sliding rod and the movable bracket can ensure the stability of the mounting bracket's movement. The elastic action of the second spring can provide a basic force for the mounting bracket's reset, ensuring that the mounting bracket and the positioning slot engage normally.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This variable cross-section wind turbine tower adopts a support and positioning mechanism. When assembling two tower bodies, the support and positioning of the tower bodies can be achieved by adjusting the arc-shaped positioning plate, thereby ensuring that the central axes of the two tower bodies are aligned. In conjunction with the linkage elastic locking mechanism, when the threaded holes on the flanges of the two tower bodies are misaligned, a rotational force is applied to the hoisted tower body, causing the tower body to deflect at a small angle until the positioning rod engages with the positioning slot, thereby achieving the alignment and positioning of the threaded holes. No cumbersome manual adjustment is required, which can ensure safety and effectively improve installation efficiency.

[0017] 2. The variable cross-section wind turbine tower adopts a contact damping seismic mechanism, which can cause the gravity block to sway under the action of potential energy when the tower body sways due to external factors. With the action of multiple sets of spring dampers, a damping force can be generated, so that the tower body can be quickly stabilized and the safety of the tower body can be guaranteed. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the internal components of the tower of the present invention;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the tower assembly of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the earthquake-resistant mechanism of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the anti-seismic mechanism, driving mechanism, and positioning mechanism of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the driving mechanism and positioning mechanism of the present invention;

[0023] Figure 6 This is a schematic diagram of a partial three-dimensional structure of the positioning mechanism of the present invention;

[0024] Figure 7 This is a schematic diagram of the wind power generation device of the present invention.

[0025] In the diagram: 1. Tower body; 101. Inner flange; 102. Threaded hole; 103. Positioning slot; 104. Staircase; 2. Base; 3. Power generation mechanism; 4. Workbench; 5. Seismic resistance mechanism; 501. Fixing rod; 502. Mounting ring; 503. Spring damper; 504. Ball bearing; 505. Steel cable; 506. Gravity block; 6. Drive mechanism; 601. Hydraulic oil tank; 602. Hydraulic rod; 603. Drive motor; 604. Fixing plate; 605. Connecting rod; 7. Positioning mechanism; 701. Support frame; 702. Movable frame; 703. Bracket; 704. Arc-shaped positioning plate; 705. Vertical rod; 706. First spring; 707. Mounting frame; 708. Positioning rod; 709. Sliding rod; 710. Second spring. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1-7 This invention provides a technical solution: a variable cross-section wind turbine tower, comprising a tower body 1, a base 2, and a power generation mechanism 3. The tower body 1 is mounted on the base 2, and the diameter of the tower body 1 gradually decreases from bottom to top. The tower body 1 is assembled to form the tower body. The power generation mechanism 3 is installed at the upper end of the tower body 1. A workbench 4 is fixed inside the tower body 1. An anti-seismic mechanism 5 is installed on the lower side of the workbench 4. A drive mechanism 6 is installed on the workbench 4. The drive mechanism 6 is interconnected with a positioning mechanism 7. The positioning mechanism 7 includes a support frame 701. The support frame 701 is connected to... The tower body 1 is slidably connected, and the support frame 701 has a cross-shaped structure. A movable frame 702 is slidably connected to the support frame 701. A bracket 703 is fixed on the movable frame 702. The bracket 703 slides in contact with the arc-shaped positioning plate 704. Four sets of arc-shaped positioning plates 704 are set at equal angles. The arc-shaped positioning plates 704 contact the inner wall of the tower body 1 to achieve positioning. An installation frame 707 is provided on the side of the movable frame 702. A positioning rod 708 is connected to the installation frame 707 by a bearing. The positioning rod 708 engages with the positioning slot 103 to achieve positioning.

[0028] The tower body 1 has inner flanges 101 fixed at both the top and bottom. Threaded holes 102 are formed at equal angles on the inner flanges 101, and positioning slots 103 are also formed at equal angles on the inner flanges 101. The positioning slots 103 correspond one-to-one with the threaded holes 102. A staircase 104 is fixedly installed inside the tower body 1. The drive mechanism 6 includes a hydraulic oil tank 601, which is fixed to the workbench 4. The hydraulic oil tank 601 is connected to the hydraulic rod 602 via a conduit and an oil pump. The hydraulic rod 602 is fixedly connected to the workbench 4, and to the support frame 701 via a bearing connection. A drive motor 603 is fixed to the output end of the hydraulic rod 602, and a fixing plate 604 is fixed to the output end of the drive motor 603. One end of the plate 604 is rotatably connected to the connecting rod 605, while the other end of the connecting rod 605 is rotatably connected to the movable frame 702. The connecting rod 605 and the movable frame 702 are distributed in a one-to-one correspondence. The arc-shaped positioning plate 704 and the positioning rod 708 are distributed in a one-to-one correspondence, and the surface of the arc-shaped positioning plate 704 in contact with the inner wall of the tower body 1 has a rough structure. A vertical rod 705 is vertically fixed on the arc-shaped positioning plate 704, and the vertical rod 705 is slidably connected to the bracket 703. A first spring 706 is also fixed between the vertical rod 705 and the bracket 703. A sliding rod 709 is fixed on the mounting frame 707, and the sliding rod 709 is slidably connected to the movable frame 702. A second spring 710 is also fixed between the sliding rod 709 and the movable frame 702.

[0029] When assembling a wind turbine tower using this variable cross-section, such as Figures 1-7As shown, firstly, the lowest tower body 1 is installed on the base 2. Then, the second tower body 1 is hoisted by a crane, so that the second tower body 1 is above the lowest tower body 1. At this time, the drive mechanism 6 and the positioning mechanism 7 are located inside the second tower body 1. The second tower body 1 is gradually lowered so that the distance between the second tower body 1 and the lowest tower body 1 is 3cm-10cm. At this time, the hydraulic rod 602 is retracted, thereby driving the drive motor 603 and the fixed plate 604 to move down. With the transmission action of the connecting rod 605, the movable frame 702 is subjected to force and slides on the support frame 701, thereby driving the arc-shaped positioning plate 704 and the positioning rod 708 to move. When the positioning rod 708 moves to the position of the second tower body 1, the second tower body 1 is lowered. When the inner wall of the inner flange 101 contacts and a displacement of 1cm-3cm occurs, the sliding guide action between the slide rod 709 and the movable frame 702 ensures the stability of the positioning rod 708's movement. At this time, the second spring 710 is compressed, and the arc-shaped positioning plate 704 is not in contact with the inner wall of the second tower body 1. Then, the drive motor 603 can drive the fixed plate 604, connecting rod 605, support frame 701, movable frame 702, arc-shaped positioning plate 704, and positioning rod 708 to rotate. At this time, the positioning rod 708 contacts and rolls with the inner wall of the lower inner flange 101 of the second tower body 1 until the positioning rod 708 engages with the positioning slot 103 on the lower inner flange 101 of the second tower body 1. At this time, the elastic force of the second spring 710... With force applied, the positioning rod 708 engages with the positioning slot 103 on the inner flange 101 below the second tower body 1, thus achieving primary positioning. By controlling the hydraulic rod 602 to continue retracting, the arc-shaped positioning plate 704 continues to move until it contacts the inner wall of the second tower body 1. Since the moving distance of the arc-shaped positioning plates 704 is equal, when all four arc-shaped positioning plates 704 are in contact with the inner wall of the second tower body 1 and generate pressure, it indicates that the central axis of the second tower body 1 coincides with the central axis of the bottommost tower body 1, thus achieving secondary positioning of the second tower body 1 and the bottommost tower body 1. After positioning and installation, the second tower body 1 continues to be lowered. At this time, observe the inner flange below the second tower body 1. The positioning rod 708, engaged with the positioning slot 103 on the upper part of tower body 101, is aligned with the positioning slot 103 on the upper inner flange 101 of the lowest tower body 1. If the positioning rod 708 aligns with the positioning slot 103 on the upper inner flange 101 of the lowest tower body 1, the second tower body 1 is lowered further down, so that the positioning rod 708, which aligns with the positioning slot 103 on the lower inner flange 101 of the second tower body 1, simultaneously aligns with the positioning slot 103 on the upper inner flange 101 of the lowest tower body 1. This achieves the positioning function of the threaded holes 102 on the upper and lower inner flanges 101. If the positioning rod 708 does not align with the positioning slot 103 on the upper inner flange 101 of the lowest tower body 1, the drive motor 603 is restarted.This causes the positioning rod 708 and the arc-shaped positioning plate 704 to rotate. Combined with the friction between the arc-shaped positioning plates 704 and the engaging action of the positioning rod 708 with the positioning slot 103 on the second tower body 1, the second tower body 1 can rotate synchronously at a small angle until the positioning rod 708 engages with the positioning slot 103 on the inner flange 101 above the lowermost tower body 1. Based on this principle, the central axis positioning of the two tower bodies 1 and the positioning function of the threaded hole 102 can be achieved, greatly improving the efficiency of assembling the two tower bodies 1.

[0030] The seismic-resistant mechanism 5 includes a fixed rod 501, the upper end of which is fixed to the workbench 4, and a mounting ring 502 is fixed to the lower end of the fixed rod 501. A spring damper 503 is fixed at equal angles inside the mounting ring 502, and a rolling ball 504 is installed at the end of the spring damper 503, and the ball 504 is in contact with the gravity block 506. The upper end of the gravity block 506 is fixed to one end of the steel cable 505, and the other end of the steel cable 505 is fixed to the workbench 4. The central axis of the gravity block 506 coincides with the central axis of the workbench 4.

[0031] After the multiple tower bodies 1 are assembled, in actual use, such as Figures 1-7 As shown, when the tower body composed of multiple tower bodies 1 sways due to external forces, the gravity block 506 moves synchronously under the action of potential energy. The movement of the gravity block 506 exerts a force on the spring damper 503, causing the spring damper 503 to move and generate damping force. Through the damping force of the spring damper 503, the vibration of the tower body 1 and the gravity block 506 can be gradually weakened, thereby making the tower body 1 quickly stable and improving the seismic resistance of the tower body 1. Moreover, since the movement of the gravity block 506 is nonlinear, through the contact rolling action between the ball bearing 504 and the gravity block 506, the force generated by the gravity block 506 can be normally transmitted to the spring damper 503, ensuring the normal operation of the device. This is the working principle of the variable cross-section wind turbine tower.

[0032] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A variable cross-section wind turbine tower, comprising a tower body (1), a base (2), and a power generation mechanism (3), wherein the tower body (1) is mounted on the base (2), and the diameter of the tower body (1) gradually decreases from bottom to top, and the tower body (1) is assembled to form a tower body, and the power generation mechanism (3) is installed at the upper end of the tower body (1), characterized in that: A workbench (4) is fixed inside the tower body (1). An anti-vibration mechanism (5) is installed on the lower side of the workbench (4). A drive mechanism (6) is installed on the workbench (4). The drive mechanism (6) is connected to a positioning mechanism (7). The positioning mechanism (7) includes a support frame (701). The support frame (701) is slidably connected to the tower body (1). The support frame (701) has a cross-shaped structure. A movable frame (702) is slidably connected to the support frame (701). A bracket (703) is fixed on the movable frame (702). The bracket (703) slides in contact with the arc-shaped positioning plate (704). 04) Four sets are set at equal angles, and the arc-shaped positioning plate (704) contacts the inner wall of the tower body (1) to achieve positioning. The movable frame (702) is provided with a mounting frame (707) on the side. The mounting frame (707) is connected to a positioning rod (708) by a bearing. The positioning rod (708) engages with the positioning slot (103) to achieve positioning. The inner flange (101) is fixed on the upper and lower sides of the inner side of the tower body (1). The inner flange (101) is provided with threaded holes (102) at equal angles. The inner flange (101) is also provided with positioning slots (103) at equal angles. The positioning slots (103) and threaded holes (102) correspond one-to-one.

2. A wind turbine tower with a variable cross-section according to claim 1, characterized in that: A staircase (104) is fixedly installed inside the tower body (1).

3. A wind turbine tower with a variable cross-section according to claim 1, characterized in that: The anti-seismic mechanism (5) includes a fixed rod (501), the upper end of the fixed rod (501) is fixed to the workbench (4), and the lower end of the fixed rod (501) is fixed with an installation ring (502).

4. A wind turbine tower with a variable cross-section according to claim 3, characterized in that: A spring damper (503) is fixed at equal angles on the inner side of the mounting ring (502), and a rolling ball (504) is installed at the end of the spring damper (503), and the ball (504) is in contact with the gravity block (506).

5. A wind turbine tower with a variable cross-section according to claim 4, characterized in that: The upper end of the gravity block (506) is fixed to one end of the steel cable (505), and the other end of the steel cable (505) is fixed to the workbench (4). The central axis of the gravity block (506) coincides with the central axis of the workbench (4).

6. A wind turbine tower with a variable cross-section according to claim 1, characterized in that: The drive mechanism (6) includes a hydraulic oil tank (601), which is fixed on the workbench (4). The hydraulic oil tank (601) is connected to the hydraulic rod (602) through a conduit and an oil pump. The hydraulic rod (602) is fixedly connected to the workbench (4), and the hydraulic rod (602) is connected to the support frame (701) by a bearing.

7. A wind turbine tower with a variable cross-section according to claim 6, characterized in that: The output end of the hydraulic rod (602) is fixed with a drive motor (603), and the output end of the drive motor (603) is fixed with a fixing plate (604). The fixing plate (604) is rotatably connected to one end of the connecting rod (605), while the other end of the connecting rod (605) is rotatably connected to the movable frame (702). The connecting rod (605) and the movable frame (702) are distributed in a one-to-one correspondence.

8. A wind turbine tower with a variable cross-section according to claim 1, characterized in that: The arc-shaped positioning plate (704) and the positioning rod (708) are distributed in a one-to-one correspondence, and the surface of the arc-shaped positioning plate (704) in contact with the inner wall of the tower body (1) has a rough structure.

9. A wind turbine tower with a variable cross-section according to claim 1, characterized in that: A vertical rod (705) is vertically fixed on the arc-shaped positioning plate (704), and the vertical rod (705) is slidably connected to the bracket (703). A first spring (706) is also fixed between the vertical rod (705) and the bracket (703).

10. A wind turbine tower with a variable cross-section according to claim 1, characterized in that: A slide rod (709) is fixed on the mounting bracket (707), and the slide rod (709) is slidably connected to the movable frame (702). A second spring (710) is also fixed between the slide rod (709) and the movable frame (702).

Images