A wind power tower section anti-twist damping connection device

Abstract

This invention relates to the field of wind power generation equipment technology, and more particularly to an anti-torsion and vibration damping connection device between wind turbine tower segments, comprising: an upper segment and a lower segment, which are interconnected by a connecting assembly; a vibration damping assembly, including a radial vibration damping mechanism and an axial vibration damping mechanism; an anti-torsion assembly, used to suppress relative torsional movement between the upper and lower segments; and a dynamic adjustment assembly, including a detection mechanism, a motion energy storage mechanism, and an electromagnetic adjustment mechanism, wherein the motion energy storage mechanism supplies power to the electromagnetic adjustment mechanism, and the electromagnetic adjustment mechanism uses electromagnetic force to adjust the relative position of the upper and lower segments. This application, through effective vibration damping, anti-torsion, and dynamic adjustment, significantly reduces the stress amplitude and fatigue damage of the connection points and surrounding structures, helping to extend the service life of the entire wind turbine tower.

Description

Technical Field

[0001] This invention relates to the field of wind power generation equipment technology, specifically to an anti-torsion and vibration damping connection device between wind turbine tower segments. Background Technology

[0002] As a key structure supporting wind turbine generators, wind turbine towers are typically constructed using a multi-segment prefabrication and on-site assembly method. Under complex alternating loads such as wind loads and turbine operating loads, radial and axial vibrations, as well as relative torsional movements, are prone to occur at the joints between tower segments. If these movements are not effectively suppressed, they will accelerate fatigue damage to the connection structure, affecting the overall stability and service life of the tower.

[0003] Currently, common tower segment connections primarily rely on high-strength bolts for rigid fixing. While this provides basic connection strength, its vibration damping and torsional resistance are limited. Some improved solutions introduce passive damping elements such as rubber pads and springs, which can absorb vibration energy to some extent. However, their damping effect is fixed and cannot be dynamically adjusted according to actual load conditions, and their suppression of torsional motion is insufficient. Furthermore, the mechanical energy consumed by traditional passive damping devices is mostly dissipated as heat, failing to be effectively utilized. Summary of the Invention

[0004] A torsional damping connection device between wind turbine tower segments, comprising:

[0005] The upper segment and the lower segment are interconnected by a connecting component;

[0006] A vibration damping assembly, comprising a radial vibration damping mechanism and an axial vibration damping mechanism, wherein the radial vibration damping mechanism is used to reduce radial vibration between the upper segment and the lower segment, and the axial vibration damping mechanism is used to reduce axial vibration between the upper segment and the lower segment;

[0007] An anti-torsion assembly, the anti-torsion assembly being used to suppress relative torsional movement between the upper segment and the lower segment;

[0008] A dynamic adjustment component includes a detection mechanism, a motion energy storage mechanism, and an electromagnetic adjustment mechanism. The detection mechanism is used to detect the relative position between the upper segment and the lower segment. The motion energy storage mechanism is used to convert and store the energy generated by vibration when the axial damping mechanism is working. The motion energy storage mechanism is used to supply energy to the electromagnetic adjustment mechanism. The electromagnetic adjustment mechanism is used to adjust the relative position between the upper segment and the lower segment using electromagnetic force.

[0009] Preferably, the connecting assembly includes an upper connecting ring and a lower connecting ring, the upper connecting ring being connected to the upper segment, the lower connecting ring being connected to the lower segment, and the upper connecting ring and the lower connecting ring being fixed together by bolts.

[0010] Preferably, the lower connecting ring is provided with a mounting cavity, and a plurality of reinforcing ribs are provided around the mounting cavity. The radial damping mechanism includes a guide sleeve, a damping spring, and an arc-shaped clamping plate. The guide sleeve is connected to the upper connecting ring, the damping spring is sleeved on the guide sleeve, one end of the damping spring is connected to the arc-shaped clamping plate, and the arc-shaped clamping plate is connected to the reinforcing ribs.

[0011] Preferably, the axial damping mechanism includes a cylinder, a piston rod, and a return spring. The cylinder is disposed on the lower connecting ring, and a damping cavity is provided inside the cylinder. The damping cavity is filled with silicone oil. One end of the piston rod is connected to the upper connecting ring, and the piston end of the piston rod is connected to the damping cavity. The piston end of the piston rod is provided with a damping hole. The two ends of the return spring are respectively connected to the side wall of the damping cavity and the piston end of the piston rod.

[0012] Preferably, the anti-torsion assembly includes steel cables, and a plurality of steel cables are arranged around the mounting cavity. The two ends of the steel cables are respectively connected to the upper connecting ring and the lower connecting ring by pre-tightening bolts.

[0013] Preferably, the detection mechanism includes an acceleration sensor and a pressure sensor, the acceleration sensor being disposed on the upper connecting ring, and the pressure sensor being disposed at the connection between the preload bolt and the lower connecting ring.

[0014] Preferably, a plurality of axial damping mechanisms are provided, and the plurality of axial damping mechanisms are arranged around the lower connecting ring along the axial direction, and the motion energy storage mechanism is arranged corresponding to the axial damping mechanisms.

[0015] Preferably, the motion energy storage mechanism includes a connecting rod, a device box, a pressing block, and a piezoelectric ceramic block. The connecting rod is connected to the piston rod and the pressing block is connected to the connecting rod. The pressing block is movably connected to the device box, which is located in the mounting cavity. The piezoelectric ceramic block is disposed inside the device box. When the connecting rod drives the pressing block to move, the pressing block will strike the piezoelectric ceramic block.

[0016] Preferably, the piezoelectric ceramic blocks disposed in different motion energy storage mechanisms are all electrically connected to the supercapacitor, which is disposed in the mounting cavity.

[0017] Preferably, the electromagnetic adjustment mechanism includes an armature and an electromagnet. Several armatures are provided, and the armatures are arranged in a circular array on the upper connecting ring. The electromagnet is provided on the lower connecting ring and electrically connected to the supercapacitor. The position of the electromagnet corresponds to that of the armature.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The present application, through the synergistic effect of the radial damping mechanism, the axial damping mechanism, and the anti-torsion steel cable, can simultaneously and effectively suppress vibrations in multiple directions at the connection points of tower segments, improving the stability and reliability of the connection; the motion energy storage mechanism can convert the mechanical energy generated by axial vibration into electrical energy through the piezoelectric effect and store it in a supercapacitor, realizing the recovery and utilization of environmental vibration energy; through the signals from the detection mechanism (accelerometer, pressure sensor) and the electrical energy recovered by the motion energy storage mechanism, the electromagnetic adjustment mechanism can actively adjust the connection state, effectively improving the device's dynamic adaptability to external loads; through effective damping, anti-torsion, and dynamic adjustment, the present application significantly reduces the stress amplitude and fatigue damage of the connection points and nearby structures, helping to extend the service life of the entire wind turbine tower. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the connection structure of the upper segment, lower segment, upper connecting ring, and lower connecting ring of the present invention;

[0020] Figure 2 This is a schematic diagram of the upper and lower connecting ring structures of the present invention;

[0021] Figure 3 This is an exploded structural diagram of the upper connecting ring, lower connecting ring, and rubber shock-absorbing ring of the present invention in a connected state;

[0022] Figure 4 This is a schematic diagram of the internal structure of the upper and lower connecting rings of the present invention;

[0023] Figure 5 This is a schematic diagram showing the positions of the connecting ring, armature, and steel cable in this invention.

[0024] Figure 6 This is a schematic diagram of the internal structure of the connecting ring of the present invention. Figure 1 ;

[0025] Figure 7 This is a schematic diagram of the internal structure of the connecting ring of the present invention. Figure 2 (One of the axial damping mechanisms is concealed);

[0026] Figure 8 This is a schematic diagram of the connection structure between the supercapacitor and each device box of the present invention;

[0027] Figure 9This is a schematic diagram of the internal structure of the cylinder and the equipment box of the present invention;

[0028] Figure 10 This is a schematic diagram of the axial damping mechanism of the present invention;

[0029] Figure 11 This is a schematic diagram of the piston rod and connecting rod connection structure of the present invention;

[0030] Figure 12 This is a schematic diagram of the connection structure between the steel cable and the pressure sensor of the present invention.

[0031] In the diagram: 1 Upper segment, 2 Lower segment, 3 Upper connecting ring, 4 Lower connecting ring, 5 Guide sleeve, 6 Shock-absorbing spring, 7 Arc-shaped clamp, 8 Cylinder, 9 Piston rod, 10 Return spring, 11 Steel cable, 12 Accelerometer, 13 Pressure sensor, 14 Connecting rod, 15 Equipment box, 16 Pressing block, 17 Piezoelectric ceramic block, 18 Supercapacitor, 19 Armature, 20 Electromagnet, 100 Rubber shock-absorbing ring, 401 Mounting cavity, 402 Reinforcing rib, 801 Damping cavity, 901 Damping hole, 1101 Preload bolt. Detailed Implementation

[0032] 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.

[0033] Please see Figures 1-12 The present invention provides a technical solution:

[0034] A torsional damping connection device between wind turbine tower segments, as shown in the attached instruction manual. Figure 1 - Appendix Figure 12 As shown.

[0035] Upper segment 1 and lower segment 2 are interconnected by a connecting component.

[0036] The vibration damping assembly includes a radial vibration damping mechanism and an axial vibration damping mechanism. The radial vibration damping mechanism is used to reduce radial vibration between the upper segment 1 and the lower segment 2, and the axial vibration damping mechanism is used to reduce axial vibration between the upper segment 1 and the lower segment 2.

[0037] Anti-torsion assembly, used to suppress relative torsional motion between upper segment 1 and lower segment 2.

[0038] The dynamic adjustment component includes a detection mechanism, a motion energy storage mechanism, and an electromagnetic adjustment mechanism. The detection mechanism is used to detect the relative position between the upper segment 1 and the lower segment 2. The motion energy storage mechanism is used to convert and store the energy generated by vibration when the axial damping mechanism is working. The motion energy storage mechanism is used to supply energy to the electromagnetic adjustment mechanism. The electromagnetic adjustment mechanism is used to adjust the relative position between the upper segment 1 and the lower segment 2 using electromagnetic force.

[0039] The connecting assembly includes an upper connecting ring 3 and a lower connecting ring 4. The upper connecting ring 3 is connected to the upper segment 1, and the lower connecting ring 4 is connected to the lower segment 2. The upper connecting ring 3 and the lower connecting ring 4 are fixed together by bolts, and a rubber shock-absorbing ring 100 is provided between the upper connecting ring 3 and the lower connecting ring 4.

[0040] The lower connecting ring 4 is provided with a mounting cavity 401, and a number of reinforcing ribs 402 are arranged around the mounting cavity 401. The radial damping mechanism includes a guide sleeve 5, a damping spring 6, and an arc-shaped clamping plate 7. The guide sleeve 5 is fixedly connected to the upper connecting ring 3 through a connector (not shown in the attached drawings of the specification). The damping spring 6 is sleeved on the outside of the guide sleeve 5, and one end of the damping spring 6 is connected to the arc-shaped clamping plate 7. The arc-shaped clamping plate 7 is connected to the reinforcing ribs 402. When radial relative displacement occurs between the upper segment 1 and the lower segment 2, the arc-shaped clamping plate 7 will squeeze the reinforcing ribs 402. At this time, the damping spring 6 deforms and absorbs energy.

[0041] The axial damping mechanism includes a cylinder 8, a piston rod 9, and a return spring 10. The cylinder 8 is located on the lower connecting ring 4 and has a damping cavity 801 inside. The damping cavity 801 is filled with silicone oil. One end of the piston rod 9 is connected to the upper connecting ring 3 through a ball joint connector. The piston end of the piston rod 9 is movably connected to the damping cavity 801. The piston end of the piston rod 9 has a damping hole 901. The two ends of the return spring 10 are respectively connected to the side wall of the damping cavity 801 and the piston end of the piston rod 9. During axial vibration, the piston end of the piston rod 9 moves, and the silicone oil flows through the damping hole 901 to generate viscous damping. The return spring 10 provides elastic recovery.

[0042] The anti-torsion assembly includes steel cables 11, and several steel cables 11 are arranged around the mounting cavity 401. The two ends of the steel cables 11 are connected to the upper connecting ring 3 and the lower connecting ring 4 respectively by pre-tension bolts 1101. The pre-tension bolts 1101 can adjust the initial tension of the steel cables 11.

[0043] The detection mechanism includes an acceleration sensor 12 and a pressure sensor 13. The acceleration sensor 12 is located on the upper connecting ring 3, and the pressure sensor 13 is located at the connection between the preload bolt 1101 and the lower connecting ring 4.

[0044] There are several axial damping mechanisms, which are arranged around the lower connecting ring 4 along the axial direction. The number of motion energy storage mechanisms corresponds to the number of axial damping mechanisms, and the positions of the motion energy storage mechanisms and the axial damping mechanisms are in one-to-one correspondence.

[0045] The motion energy storage mechanism includes a connecting rod 14, an equipment box 15, a pressing block 16, and a piezoelectric ceramic block 17. The connecting rod 14 is connected to the piston rod 9 and the pressing block 16 is connected to the connecting rod 14. The pressing block 16 is movably connected to the equipment box 15. The equipment box 15 and the cylinder 8 are interconnected. The equipment box 15 is located in the mounting cavity 401. The piezoelectric ceramic block 17 is installed inside the equipment box 15. When the connecting rod 14 drives the pressing block 16 to move, the pressing block 16 will strike the piezoelectric ceramic block 17.

[0046] The piezoelectric ceramic blocks 17, each located in a different motion energy storage mechanism, are electrically connected to a supercapacitor 18. The supercapacitor 18 is located in the mounting cavity 401. When the piston rod 9 reciprocates, it drives the connecting rod 14 and the pressing block 16 to swing, causing the pressing block 16 to repeatedly strike the piezoelectric ceramic blocks 17 to generate current. The output terminals of all the piezoelectric ceramic blocks 17 are connected in parallel to the supercapacitor 18 installed in the mounting cavity 401. The input terminal of the supercapacitor 18 is equipped with a rectifier, and the current rectified by the rectifier enters the supercapacitor 18 for storage.

[0047] The electromagnetic adjustment mechanism includes armatures 19 and electromagnets 20. Several armatures 19 are arranged in a circular array on the upper connecting ring 3. Electromagnets 20 are located on the lower connecting ring 4 and are electrically connected to a supercapacitor 18. The position of the electromagnets 20 corresponds to that of the armatures 19. Electromagnets 20 are connected to the supercapacitor 18 and a simple control circuit (the control circuit is prior art and not shown in the accompanying drawings, but includes voltage detection and switching control) via wires. The control circuit receives signals from the acceleration sensor 12 and the pressure sensor 13, and controls the opening and closing of the electromagnets 20 based on the data from the acceleration sensor 12 and the pressure sensor 13.

[0048] Working principle: During use, under wind load, the upper section 1 may experience radial sway, axial compression / tension and torsional tendency relative to the lower section 2; the radial sway is buffered by the system consisting of guide sleeve 5 and shock absorber spring 6; the axial movement is absorbed by the silicone oil damping and return spring 10 in cylinder 8; the torsional tendency is restrained by the pre-tensioned steel cable 11.

[0049] When the axial vibration drives the piston rod 9 to move, it drives the piezoelectric ceramic block 17 to generate electricity through the connecting rod 14 and the pressing block 16. The electrical energy is stored in the supercapacitor 18. At the same time, the acceleration sensor 12 and the pressure sensor 13 monitor the vibration and the stress state of the steel cable 11 in real time. When the system detects abnormal vibration or a decrease in preload, the control circuit can activate the circuit of the electromagnet 20 (powered by the supercapacitor 18) in a timely manner. The electromagnet 20 generates a magnetic field, thereby generating an electromagnetic force for regulation. The electromagnetic force interacts with the upper armature 19 to help maintain the alignment of the upper connecting ring 3 and the lower connecting ring 4, thereby reducing vibration and torsion.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A torsional damping connection device between wind turbine tower segments, characterized in that, include: The upper segment and the lower segment are interconnected by a connecting component; A vibration damping assembly, comprising a radial vibration damping mechanism and an axial vibration damping mechanism, wherein the radial vibration damping mechanism is used to reduce radial vibration between the upper segment and the lower segment, and the axial vibration damping mechanism is used to reduce axial vibration between the upper segment and the lower segment; An anti-torsion assembly, the anti-torsion assembly being used to suppress relative torsional movement between the upper segment and the lower segment; A dynamic adjustment component includes a detection mechanism, a motion energy storage mechanism, and an electromagnetic adjustment mechanism. The detection mechanism is used to detect the relative position between the upper segment and the lower segment. The motion energy storage mechanism is used to convert and store the energy generated by vibration when the axial damping mechanism is working. The motion energy storage mechanism is used to supply energy to the electromagnetic adjustment mechanism. The electromagnetic adjustment mechanism is used to adjust the relative position between the upper segment and the lower segment using electromagnetic force. The connecting assembly includes an upper connecting ring and a lower connecting ring, wherein the lower connecting ring is provided with a mounting cavity; The axial damping mechanism includes a cylinder, a piston rod, and a return spring. The cylinder is disposed on the lower connecting ring and has a damping cavity inside. The damping cavity is filled with silicone oil. One end of the piston rod is connected to the upper connecting ring, and the piston end of the piston rod is connected to the damping cavity. The piston end of the piston rod has a damping hole. The two ends of the return spring are respectively connected to the side wall of the damping cavity and the piston end of the piston rod. The axial damping mechanism is provided in several parts, and the several axial damping mechanisms are arranged around the axial direction of the lower connecting ring. The motion energy storage mechanism is arranged corresponding to the axial damping mechanism. The motion energy storage mechanism includes a connecting rod, a device box, a pressing block, and a piezoelectric ceramic block. The connecting rod is connected to the piston rod and the pressing block is connected to the connecting rod. The pressing block is movably connected to the device box, which is located in the mounting cavity. The piezoelectric ceramic block is located inside the device box. When the connecting rod drives the pressing block to move, the pressing block will strike the piezoelectric ceramic block.

2. The anti-torsion and vibration damping connection device between wind turbine tower segments according to claim 1, characterized in that: The upper connecting ring is connected to the upper segment, and the lower connecting ring is connected to the lower segment. The upper connecting ring and the lower connecting ring are fixed together by bolts.

3. The anti-torsion and vibration damping connection device between wind turbine tower segments according to claim 2, characterized in that: A plurality of reinforcing ribs are arranged around the mounting cavity. The radial damping mechanism includes a guide sleeve, a damping spring, and an arc-shaped clamping plate. The guide sleeve is connected to the upper connecting ring. The damping spring is sleeved on the guide sleeve. One end of the damping spring is connected to the arc-shaped clamping plate. The arc-shaped clamping plate is connected to the reinforcing ribs.

4. The anti-torsion and vibration damping connection device between wind turbine tower segments according to claim 1, characterized in that: The anti-torsion assembly includes steel cables, and several steel cables are arranged around the mounting cavity. The two ends of the steel cables are respectively connected to the upper connecting ring and the lower connecting ring by pre-tightening bolts.

5. The anti-torsion and vibration damping connection device between wind turbine tower segments according to claim 4, characterized in that: The detection mechanism includes an acceleration sensor and a pressure sensor. The acceleration sensor is located on the upper connecting ring, and the pressure sensor is located at the connection between the preload bolt and the lower connecting ring.

6. The anti-torsion and vibration damping connection device between wind turbine tower segments according to claim 1, characterized in that: The piezoelectric ceramic blocks disposed in different motion energy storage mechanisms are all electrically connected to the supercapacitor, which is disposed in the mounting cavity.

7. The anti-torsion and vibration damping connection device between wind turbine tower segments according to claim 6, characterized in that: The electromagnetic adjustment mechanism includes an armature and an electromagnet. Several armatures are provided, and the armatures are arranged in a circular array on the upper connecting ring. The electromagnets are provided on the lower connecting ring and are electrically connected to the supercapacitor. The positions of the electromagnets are set corresponding to the armatures.

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