Damping structure of wind power generation tower drum

Abstract

The utility model discloses a wind power generation tower drum damping structure which comprises a concrete stand column, the lower end of the concrete stand column is fixedly connected with a ground foundation, and a mechanical damping structure is connected between the outer wall of the concrete stand column and the inner wall of an external wind power generation tower drum body. The mechanical damping structure comprises a first supporting frame, a second supporting frame, a telescopic damping rod, a first connecting shaft, a second connecting shaft, a first connector and a second connector, at least one set of electromagnets are fixedly installed on the outer wall of the concrete stand column, and an annular magnetizer fixed to the inner wall of a barrel of an external wind power generation tower is arranged on the outer wall of the concrete stand column. The damping structure of the wind power generation tower drum is simple in structure and convenient to produce, manufacture and assemble, the maintenance cost is reduced, and the damping efficiency and effect are improved through composite damping of a mechanical damping structure (low frequency) and magnetic force (high frequency).

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power tower drum anti -shaking technical field, concretely is a wind power tower drum damping structure. BACKGROUND

[0002] Wind power tower drum will be subjected to wind load, mechanical vibration and other various external force action in the operation process, lead to tower drum to produce sway and vibration. These vibrations not only can affect the structural safety of tower drum, can also reduce the power generation efficiency, even cause resonance phenomenon, cause serious security risks.

[0003] Therefore, how to effectively suppress tower drum vibration becomes an important topic in the field of wind power generation technology.

[0004] In the prior art wind power tower drum damping technology, the Chinese patent with the authorization announcement number CN222163388U discloses a damping structure relying on the inertia motion of counterweight. The structure realizes vibration suppression through the combination of counterweight and spring, but has the following significant shortcomings:

[0005] 1. Limited frequency range: this technology can only effectively suppress single frequency (such as 0.5-2Hz) vibration, while the vibration frequency range of actual wind power tower drum is wider (usually 0.1-10Hz), resulting in its inability to cover the full-band vibration requirement;

[0006] 2. Mechanical delay problem: the counterweight realizes reverse motion through spring pulling, which has mechanical delay, making it difficult to match the suppression force and vibration phase, which may exacerbate the resonance phenomenon and increase the instability of the tower drum;

[0007] 3. Complex structure: the damping structure relies on multiple sets of counterweight and spring, which not only increases the manufacturing and maintenance cost, but also reduces the reliability due to complex structure.

[0008] Therefore, we propose a wind power tower drum damping structure. CONTENT OF THE UTILITY MODEL

[0009] (I) Technical problems solved

[0010] In view of the deficiencies of the prior art, the utility model provides a wind power tower drum damping structure, which realizes composite damping through mechanical damping structure (low frequency) and magnetic force (high frequency), improves the efficiency and effect of damping, and can effectively solve the problems in the background art.

[0011] (II) Technical scheme

[0012] In order to achieve the above object, the technical scheme adopted by the utility model is: a wind power generation tower drum damping structure, including concrete stand, the lower end of the concrete stand is fixedly connected with ground foundation, the outer wall of the concrete stand is connected with the inner wall of the outer wind power generation tower drum body and is provided with mechanical damping structure, the mechanical damping structure includes first support frame, second support frame, telescopic damping rod, first connecting shaft, second connecting shaft, first connecting head and second connecting head, and the outer wall of the concrete stand is fixedly installed with at least one group of electromagnet, and is provided with annular magnet conductor fixed to the inner wall of the outer wind power generation tower drum body.

[0013] Preferably, the annular magnet conductor and the electromagnet form a magnetic repulsion gap, and the annular magnet conductor and the electromagnet are arranged in radial opposition.

[0014] Preferably, the electromagnet is connected with a controller of a vibration sensor, the vibration sensor is installed on the inner wall of the tower drum body, and the controller is electrically connected with the electromagnet.

[0015] Preferably, the first support frame is fixed on the outer wall of the concrete stand, the second support frame is fixed on the inner wall of the outer wind power generation tower drum body, the first connecting shaft is installed on the first support frame, and the second connecting shaft is installed on the second support frame.

[0016] Preferably, a bearing is arranged between the first connecting shaft and the first support frame, the first connecting shaft is rotatably connected with the first support frame through the bearing, a bearing is arranged between the second connecting shaft and the second support frame, and the second connecting shaft is rotatably connected with the second support frame through the bearing.

[0017] Preferably, the first connecting head is fixed at the rear end of the middle cylinder of the telescopic damping rod, the second connecting head is fixed at the front end of the piston rod of the telescopic damping rod, the first connecting head is fixed on the outer wall of the middle part of the first connecting shaft, and the second connecting head is fixed on the outer wall of the middle part of the second connecting shaft.

[0018] (Three) beneficial effects

[0019] Compared with the prior art, the utility model provides a wind power generation tower drum damping structure, which has the following beneficial effects:

[0020] 1、the wind power generation tower drum damping structure, through the combination of mechanical damping structure (low frequency) and magnetic damping (high frequency), effectively suppresses the vibration of the wind power generation tower drum in the range of 0.1-10Hz, overcomes the limitation that the traditional technology can only cope with single frequency, and significantly improves the damping effect.

[0021] 2. In this wind power generation tower damping structure, the magnetic repulsion between the electromagnet and the annular magnetic conductor can be adjusted in real time. Dynamic response is achieved through vibration sensors and controllers, avoiding the delay problem of traditional mechanical damping, ensuring precise matching between the damping force and the vibration phase, and preventing the resonance from intensifying.

[0022] 3. This wind power tower damping structure can provide effective suppression when the magnetic damping is insufficient due to extreme conditions (such as strong winds), thus ensuring the stability of the tower and avoiding the risk of loss of control. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a wind power generation tower damping structure according to the present invention.

[0024] Figure 2 This is a schematic diagram of the annular magnetic conductor and electromagnet in the damping structure of a wind power generation tower according to this utility model.

[0025] Figure 3 This is a schematic diagram of the mechanical damping structure in the damping structure of a wind power generation tower according to the present invention.

[0026] Figure 4 This is a schematic diagram of the telescopic damping rod in the damping structure of a wind power generation tower according to this utility model.

[0027] In the diagram: 1. Concrete column; 2. Mechanical damping structure; 3. Ring-shaped magnetic conductor; 4. Electromagnet; 5. First support frame; 6. Second support frame; 7. Telescopic damping rod; 8. First connecting shaft; 9. Second connecting shaft; 10. First connector; 11. Second connector. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0029] This embodiment is a damping structure for a wind power generation tower.

[0030] like Figures 1-4 As shown, it includes a concrete column 1, the lower end of which is fixedly connected to the ground foundation. A mechanical damping structure 2 is connected between the outer wall of the concrete column 1 and the inner wall of the external wind power generation tower. The mechanical damping structure 2 includes a first support frame 5, a second support frame 6, a telescopic damping rod 7, a first connecting shaft 8, a second connecting shaft 9, a first connector 10, and a second connector 11. At least one set of electromagnets 4 are fixedly installed on the outer wall of the concrete column 1, and an annular magnetic conductor 3 is fixed to the inner wall of the external wind power generation tower.

[0031] The magnetic repulsion gap is formed between the annular magnetic conductor 3 and the electromagnet 4, and the annular magnetic conductor 3 and the electromagnet 4 are arranged in radial opposition; the controller of the vibration sensor is connected to the outside of the electromagnet 4, the vibration sensor is installed on the inner wall of the tower body, and the controller is electrically connected with the electromagnet 4; the first support frame 5 is fixed on the outer wall of the concrete column 1, the second support frame 6 is fixed on the inner wall of the outer wind power tower body, the first connecting shaft 8 is installed on the first support frame 5, and the second connecting shaft 9 is installed on the second support frame 6; the bearing is arranged between the first connecting shaft 8 and the first support frame 5, the first connecting shaft 8 is rotatably connected with the first support frame 5 through the bearing, the bearing is arranged between the second connecting shaft 9 and the second support frame 6, and the second connecting shaft 9 is rotatably connected with the second support frame 6 through the bearing; the first connecting head 10 is fixed at the rear end of the middle body of the telescopic damping rod 7, the second connecting head 11 is fixed at the front end of the piston rod of the telescopic damping rod 7, the first connecting head 10 is fixed on the outer wall of the middle part of the first connecting shaft 8, and the second connecting head 11 is fixed on the outer wall of the middle part of the second connecting shaft 9.

[0032] It should be noted that the utility model is a kind of wind power tower damping structure, annular magnetic conductor 3 and electromagnet 4 are arranged, annular magnetic conductor 3 is fixed on the inner wall of wind power tower, electromagnet 4 is fixed on the outer wall of concrete column 1, and damping is carried out using magnetic repulsion, the size of repulsion force can be changed in real time by adjusting the current of electromagnet 4, different frequency vibrations (such as wind vibration, vortex-induced vibration in the range of 0.1-5Hz) are matched, it is superior to traditional damper, and redundant safety design is provided, when magnetic force is insufficient (such as extreme strong wind), mechanical damping structure 2 can also be damped, the efficiency and effect of damping are improved by mechanical damping structure and magnetic force composite damping, and tower resonance out of control is avoided.

[0033] It should be noted that in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. In this document, the terms "including" and "comprising" are used interchangeably.

[0034] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A wind power tower damping structure comprising a concrete column (1), the lower end of the concrete column (1) is fixedly connected with a ground foundation, characterized in that: The outer wall of the concrete column (1) is connected with the inner wall of the outer wind power tower cylinder, and a mechanical damping structure (2) is arranged between the outer wall of the concrete column (1) and the inner wall of the outer wind power tower cylinder, the mechanical damping structure (2) comprises a first support frame (5), a second support frame (6), an elastic damping rod (7), a first connecting shaft (8), a second connecting shaft (9), a first connecting head (10) and a second connecting head (11), and at least one group of electromagnets (4) are fixedly installed on the outer wall of the concrete column (1), and an annular magnetic conductor (3) fixed to the inner wall of the outer wind power tower cylinder is arranged.

2. The wind power tower damping structure of claim 1, wherein: The annular magnetic conductor (3) and the electromagnet (4) form a magnetic repulsion gap, and the annular magnetic conductor (3) and the electromagnet (4) are arranged in radial opposition.

3. The wind power tower damping structure of claim 2, wherein: The electromagnet (4) is connected with a vibration sensor controller, the vibration sensor is installed on the inner wall of the tower cylinder body, and the controller is electrically connected with the electromagnet (4).

4. The wind power tower damping structure of claim 3, wherein: The first support frame (5) is fixed on the outer wall of the concrete column (1), the second support frame (6) is fixed on the inner wall of the outer wind power tower cylinder, the first connecting shaft (8) is installed on the first support frame (5), and the second connecting shaft (9) is installed on the second support frame (6).

5. The wind power tower damping structure of claim 4, wherein: The first connecting shaft (8) and the first support frame (5) are provided with a bearing, the first connecting shaft (8) is rotatably connected with the first support frame (5) through the bearing, the second connecting shaft (9) and the second support frame (6) are provided with a bearing, and the second connecting shaft (9) is rotatably connected with the second support frame (6) through the bearing.

6. The wind power tower damping structure of claim 5, wherein: The first connecting head (10) is fixed at the rear end of the middle cylinder of the elastic damping rod (7), the second connecting head (11) is fixed at the front end of the piston rod of the elastic damping rod (7), the first connecting head (10) is fixed on the outer wall of the middle part of the first connecting shaft (8), and the second connecting head (11) is fixed on the outer wall of the middle part of the second connecting shaft (9).

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