Damping device for tower drum of large offshore wind driven generator

Abstract

The utility model discloses a damping device for a tower drum of a large offshore wind driven generator, and relates to the technical field of wind power generation. The vibration damper comprises a mounting seat, a cylinder is fixedly connected to the top of the mounting seat, and a vibration damping groove is formed in an inner cavity of the cylinder. The upper metal balls and the lower metal balls are arranged in the upper connecting cylinder and the lower connecting cylinder respectively, vibration force acting on the tower cylinder is effectively dispersed, the metal balls can play a role in buffering when the tower cylinder is stressed, vibration transmission and accumulation are reduced, and therefore dynamic loads borne by the tower cylinder structure are reduced, and in addition, the structure of the tower cylinder structure is improved. The second dampers movably connected to the periphery of the surface of the upper connecting cylinder are matched with the first dampers movably connected to the surface of the lower connecting cylinder to form a self-adaptive vibration reduction system, and when the tower cylinder is subjected to force in different directions and with different strengths, the working states of the dampers can be automatically adjusted according to the actual vibration state, so that the vibration reduction effect of the tower cylinder is improved. And an effective vibration reduction effect is provided.

Description

Technical Field

[0001] This utility model belongs to the field of wind power generation technology, and in particular relates to a vibration reduction device for large offshore wind turbine towers. Background Technology

[0002] Large offshore wind turbine towers are the main structural components that support offshore wind turbine rotors, generators, and other related equipment. Their design and construction must meet the special requirements of the marine environment. The tower is usually composed of multiple steel or concrete sections that are connected to form a support platform. It is typically installed on the seabed and fixed by an underwater foundation structure. Its main function is to convert wind energy into mechanical energy through the rotor, then into electrical energy through the generator, and finally transmit the generated electricity to the power grid.

[0003] Large offshore wind turbine towers in the present technology are usually installed on the seabed to support the wind turbine and its related equipment. However, due to the high wind speed on the seabed, the tower is prone to swaying or vibration. Although the tower design takes into account some structural stability, the vibration reduction structure inside the existing tower usually shows insufficient adaptability when dealing with different wind and wave conditions. The vibration reduction system fails to effectively cope with the complex marine environment, which may lead to structural fatigue, equipment damage, or even shorten its service life during long-term use.

[0004] To address these issues, we provide vibration damping devices for large offshore wind turbine towers. Utility Model Content

[0005] The purpose of this invention is to provide a vibration reduction device for large offshore wind turbine towers. By combining vibration reduction components and lubrication components, it solves the problem that large offshore wind turbine towers in the prior art have poor vibration reduction adaptability and are prone to affecting the service life of the structure.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a vibration damping device for a large offshore wind turbine tower, comprising a mounting base, a cylinder body fixedly connected to the top of the mounting base, and a vibration damping groove formed in the inner cavity of the cylinder body; a vibration damping assembly is provided in the inner cavity of the cylinder body, the vibration damping assembly comprising a first damper, the first damper being movably connected to the periphery of the inner cavity of the vibration damping groove, the free end of the first damper being movably connected to a lower connecting cylinder, and second dampers being movably connected to the periphery of the inner cavity of the cylinder body, the free ends of the second dampers being movably connected to an upper connecting cylinder; a lubrication assembly is provided in the inner cavities of both the upper and lower connecting cylinders, the lubrication assembly comprising an oil leakage groove, the oil leakage groove being formed at the top of the inner cavities of the upper and lower connecting cylinders, an oil-absorbing pad being fixedly connected to one side of the inner cavity of the oil leakage groove, and an oil injection pipe being connected to one side of the oil leakage groove, the surface of the oil injection pipe being fitted with a valve.

[0008] The present invention is further configured such that the vibration damping component includes a lower metal ball, the lower metal ball is movably connected to the inner cavity of the lower connecting cylinder, a connecting rod is fixedly connected to the surface of the lower metal ball, and an upper metal ball is fixedly connected to one end of the connecting rod.

[0009] The present invention is further configured such that an oil squeezing block is fixedly connected to one side of the surface of both the lower metal ball and the upper metal ball, and the surface of the oil squeezing block is in contact with the surface of the oil-absorbing pad.

[0010] The present invention is further configured such that a drop rope is fixedly connected to one side of the surface of the second damper, and a counterweight is fixedly connected to one end of the drop rope.

[0011] The present invention is further configured such that the inner cavities of the lower connecting cylinder and the upper connecting cylinder are provided with movable grooves, and the lower metal ball and the upper metal ball are both movably connected to the inner cavity of the movable grooves.

[0012] The present invention is further configured such that an oil inlet is provided on one side of the oil leakage groove, and the oil absorption pad is fixedly connected to the inner cavity of the oil inlet.

[0013] The present invention is further configured such that a reinforcing plate is fixedly connected to the top of the mounting base, and the surface of the reinforcing plate is fixedly connected to the bottom of the inner cavity of the cylinder.

[0014] The present invention is further provided that mounting holes are provided around the inner cavity of the mounting base, and the mounting holes are used to mount the cylinder.

[0015] The present invention has the following beneficial effects.

[0016] 1. This utility model effectively disperses the vibration force acting on the tower by using upper and lower metal balls respectively installed inside the upper and lower connecting cylinders. The metal balls can buffer the tower when it is under stress, reduce the transmission and accumulation of vibration, and thus reduce the dynamic load on the tower structure. In addition, the second damper movably connected around the surface of the upper connecting cylinder and the first damper movably connected to the surface of the lower connecting cylinder cooperate with each other to form an adaptive vibration reduction system. When the tower is subjected to forces of different directions and intensities, these dampers can automatically adjust their working state according to the actual vibration state, providing an effective vibration reduction effect.

[0017] 2. This utility model, through the oil leakage groove and oil absorption pad opened in the inner cavity of the upper and lower connecting cylinders, can squeeze the lubricating oil in the oil leakage groove through the oil squeezing block on its surface when the upper and lower metal balls swing, so that the lubricating oil can be evenly coated on the surface of the upper and lower metal balls, thereby improving the durability and flexibility of the upper and lower metal balls. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional view of the vibration reduction device for a large offshore wind turbine tower.

[0020] Figure 2 This is a cross-sectional view of the cylinder body in the vibration damping device of a large offshore wind turbine tower.

[0021] Figure 3 This is a schematic diagram of the internal structure of the cylinder in the vibration damping device of a large offshore wind turbine tower.

[0022] Figure 4 An exploded view of the surface structure of the connecting rod in the vibration damping device of a large offshore wind turbine tower.

[0023] Figure 5 This is a cross-sectional view of the upper and lower connecting cylinders in the vibration damping device of a large offshore wind turbine tower.

[0024] In the attached diagram: 1. Mounting base; 2. Cylinder body; 3. Vibration damping groove; 4. First damper; 5. Lower connecting cylinder; 6. Second damper; 7. Upper connecting cylinder; 8. Oil leakage groove; 9. Oil suction pad; 10. Oil injection pipe; 11. Valve; 12. Lower metal ball; 13. Connecting rod; 14. Upper metal ball; 15. Oil squeezing block; 16. Suspension rope; 17. Counterweight block; 18. Reinforcing plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1

[0027] Please see Figure 1-5 This utility model is a vibration damping device for a large offshore wind turbine tower, including a mounting base 1, a cylinder 2 fixedly connected to the top of the mounting base 1, and a vibration damping groove 3 opened in the inner cavity of the cylinder 2; a vibration damping component is provided in the inner cavity of the cylinder 2, the vibration damping component includes a first damper 4, the first damper 4 is movably connected to the periphery of the inner cavity of the vibration damping groove 3, the free end of the first damper 4 is movably connected to a lower connecting cylinder 5, a second damper 6 is movably connected to the periphery of the inner cavity of the cylinder 2, and the free end of the second damper 6 is movably connected to an upper connecting cylinder 7; a lubrication component is provided in the inner cavity of both the upper connecting cylinder 7 and the lower connecting cylinder 5, the lubrication component includes an oil leakage groove 8, the oil leakage groove 8 is opened at the top of the inner cavity of the upper connecting cylinder 7 and the lower connecting cylinder 5, an oil absorption pad 9 is fixedly connected to one side of the inner cavity of the oil leakage groove 8, an oil injection pipe 10 is connected to one side of the oil leakage groove 8, and a valve 11 is installed on the surface of the oil injection pipe 10.

[0028] Specifically: There are four first dampers 4 and four second dampers 6. The first damper 4 is movably connected between the vibration damping groove 3 and the lower connecting cylinder 5. The second damper 6 is movably connected between the inner wall of the cylinder 2 and the upper connecting cylinder 7. The lubricating oil inside the oil leakage groove 8 can be absorbed by the oil absorption pad 9, and then, after being squeezed by the upper metal ball 14 or the lower metal ball 12, it is applied to its surface. Through the oil injection pipe 10 and the valve 11, lubricating oil can be periodically added to the inside of the oil leakage groove 8 when lubrication is needed.

[0029] Example 2

[0030] Please see Figure 1-5 Based on Embodiment 1, the vibration damping assembly further includes a lower metal ball 12, which is movably connected to the inner cavity of the lower connecting cylinder 5. A connecting rod 13 is fixedly connected to the surface of the lower metal ball 12, and an upper metal ball 14 is fixedly connected to one end of the connecting rod 13. An oil squeezing block 15 is fixedly connected to one side of the surfaces of both the lower metal ball 12 and the upper metal ball 14. The surface of the oil squeezing block 15 is in contact with the surface of the oil-absorbing pad 9. A drop rope 16 is fixedly connected to one side of the surface of the second damper 6, and a counterweight block 17 is fixedly connected to one end of the drop rope 16. Movable grooves are opened in the inner cavities of the lower connecting cylinder 5 and the upper connecting cylinder 7. The lower metal ball 12 and the upper metal ball 14 are movably connected to the inner cavity of the movable grooves. An oil inlet is opened on one side of the oil leakage groove 8. The oil-absorbing pad 9 is fixedly connected to the inner cavity of the oil inlet. A reinforcing plate 18 is fixedly connected to the top of the mounting base 1. The surface of the reinforcing plate 18 is fixedly connected to the bottom of the inner cavity of the cylinder 2. Mounting holes are opened around the inner cavity of the mounting base 1 for mounting the cylinder 2.

[0031] Specifically: the two ends of the connecting rod 13 are fixedly connected to one side of the surface of the upper metal ball 14 and the lower metal ball 12, respectively. The upper metal ball 14 and the lower metal ball 12 move in the inner cavity of the upper connecting cylinder 7 and the lower connecting cylinder 5, respectively. The oil squeezing block 15 and the surface of the oil-absorbing pad 9 are in contact. When the upper metal ball 14 or the lower metal ball 12 swings, it can squeeze the surface of the oil-absorbing pad 9. The oil-absorbing pad 9 can play a certain sealing role for the oil leakage port of the oil leakage groove 8. The reinforcing plate 18 is used to reinforce the cylinder 2 so that it can be installed in the required position. The oil-absorbing pad 9 is usually made of highly absorbent cotton paper or similar fibrous materials, which can absorb oil and play a certain sealing role for the oil leakage area.

[0032] The working principle of this utility model is as follows: When the large offshore wind turbine tower is installed on the seabed and subjected to vibration, the upper metal ball 14 and lower metal ball 12 respectively installed inside the upper connecting cylinder 7 and the lower connecting cylinder 5 can play a buffering role when the tower is subjected to force, reducing the transmission and accumulation of vibration, thereby reducing the dynamic load borne by the tower structure. The second damper 6 movably connected around the surface of the upper connecting cylinder 7 and the first damper 4 movably connected to the surface of the lower connecting cylinder 5 cooperate with each other to form an adaptive vibration reduction system. When the tower is subjected to forces of different directions and intensities, these dampers can automatically adjust their working state according to the actual vibration state, providing an effective vibration reduction effect.

[0033] When the metal balls inside the cylinder 2 need to be lubricated, the workers inject lubricating oil into the oil drain trough 8 through the oil injection pipe 10 and valve 11. When the cylinder 2 is vibrated, the upper metal ball 14 and the lower metal ball 12 swing inside the upper connecting cylinder 7 and the lower connecting cylinder 5. The movement of the oil squeezing block 15 will squeeze the oil absorption pad 9, so that the lubricating oil can be evenly coated on the surface of the upper metal ball 14 and the lower metal ball 12, thereby improving the durability and flexibility of the vibration damping structure.

[0034] All standard parts used in this invention can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through the control unit. The control circuit of the control unit can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Therefore, the control method and circuit connection will not be explained in detail in this invention.

[0035] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A vibration damping device for a large offshore wind turbine tower, comprising a mounting base (1), characterized in that: The top of the mounting base (1) is fixedly connected to a cylinder (2), and the inner cavity of the cylinder (2) is provided with a vibration damping groove (3); The inner cavity of the cylinder (2) is provided with a vibration damping component, which includes a first damper (4). The first damper (4) is movably connected to the periphery of the inner cavity of the vibration damping groove (3). The free end of the first damper (4) is movably connected to a lower connecting cylinder (5). The periphery of the inner cavity of the cylinder (2) is movably connected to a second damper (6). The free end of the second damper (6) is movably connected to an upper connecting cylinder (7). The upper connecting cylinder (7) and the lower connecting cylinder (5) are both provided with lubrication components. The lubrication components include an oil leakage groove (8). The oil leakage groove (8) is opened at the top of the inner cavity of the upper connecting cylinder (7) and the lower connecting cylinder (5). An oil-absorbing pad (9) is fixedly connected to one side of the inner cavity of the oil leakage groove (8). An oil injection pipe (10) is connected to one side of the oil leakage groove (8). A valve (11) is installed on the surface of the oil injection pipe (10).

2. The vibration reduction device for a large offshore wind turbine tower according to claim 1, characterized in that: The vibration damping assembly also includes a lower metal ball (12), which is movably connected to the inner cavity of the lower connecting cylinder (5). A connecting rod (13) is fixedly connected to the surface of the lower metal ball (12), and an upper metal ball (14) is fixedly connected to one end of the connecting rod (13).

3. The vibration reduction device for a large offshore wind turbine tower according to claim 2, characterized in that: Oil squeezing blocks (15) are fixedly connected to one side of the surfaces of the lower metal ball (12) and the upper metal ball (14), and the surface of the oil squeezing block (15) is in contact with the surface of the oil-absorbing pad (9).

4. The vibration reduction device for a large offshore wind turbine tower according to claim 1, characterized in that: A drop rope (16) is fixedly connected to one side of the surface of the second damper (6), and a counterweight (17) is fixedly connected to one end of the drop rope (16).

5. The vibration reduction device for a large offshore wind turbine tower according to claim 2, characterized in that: The lower connecting cylinder (5) and the upper connecting cylinder (7) have movable grooves in their inner cavities, and the lower metal ball (12) and the upper metal ball (14) are both movably connected to the inner cavity of the movable grooves.

6. The vibration reduction device for a large offshore wind turbine tower according to claim 1, characterized in that: An oil inlet is provided on one side of the oil leakage groove (8), and the oil absorption pad (9) is fixedly connected to the inner cavity of the oil inlet.

7. The vibration reduction device for a large offshore wind turbine tower according to claim 1, characterized in that: The top of the mounting base (1) is fixedly connected to a reinforcing plate (18), and the surface of the reinforcing plate (18) is fixedly connected to the bottom of the inner cavity of the cylinder (2).

8. The vibration reduction device for a large offshore wind turbine tower according to claim 1, characterized in that: The mounting base (1) has mounting holes around its inner cavity, which are used to mount the cylinder (2).

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