A new type of offshore wind power semi-submersible wind turbine foundation

Abstract

The utility model discloses a novel offshore wind power semi-submersible wind turbine foundation, including a water tank foundation and a tower arranged on the water tank foundation, a wind turbine is arranged on the top of the tower, a fixed frame group is arranged on the water tank foundation, and the tower is suspended on the water tank foundation through the coordination of the balancing mechanism arranged thereon and the fixed frame group; the balancing mechanism and the fixed frame group can be rotatably coordinated, including an X-axis rotation adjustment component and a Y-axis rotation adjustment component, and a damping component is arranged at the bottom of the tower, and the tower realizes automatic shock absorption through the coordination of the X-axis rotation adjustment component, the Y-axis rotation adjustment component and the damping component. The present application uses a ballast water tank for vibration reduction - dual-degree-of-freedom rotation vibration reduction - a damping component at the bottom of the tower for vibration reduction. This three-layer layer-by-layer vibration reduction method reduces the vibration of the wind turbine to the greatest extent; the balancing damper at the bottom of the tower optimizes the previous problem of resonance between the blades and the foundation when the wind turbine is working, which greatly improves the safety of the wind turbine during movement.

Description

Technical Field

[0001] The utility model belongs to the technical field of offshore wind power engineering, and specifically relates to a novel offshore wind power semi-submersible wind turbine foundation. Background Art

[0002] Semi-submersible foundation is a mature technology in the field of offshore oil and gas development. With the development of offshore wind power in recent years, this type of foundation has also begun to be widely used in the field of offshore wind power. Compared with floating foundations, it has good stability and is particularly suitable for deep-sea environments. It is known as the ideal choice for deep-sea wind power. At the same time, as a floating foundation, it has strong mobility and can complete most of the installation work underwater, greatly reducing the dependence on offshore weather conditions.

[0003] However, the semi-submersible foundation of offshore wind power still faces many technical challenges. The first is the vibration problem in the marine environment, which directly affects the safety and effectiveness of wind turbines. Due to the influence of complex marine environments such as wind, waves, tides and sea ice, the static and dynamic stability of semi-submersible foundations has always been the main technical bottleneck restricting its development. Especially in harsh marine environments, such as high winds, big waves and other extreme conditions, wind turbines are susceptible to strong vibrations, which affects the normal operation of wind turbines.

[0004] Secondly, the current design and manufacturing process of semi-submersible foundations is complex and challenging. Since the design requires the semi-submersible foundation to float stably in the waves, there are high requirements for its structural design and material selection, and the construction and installation process is relatively complicated, resulting in high costs, which is also an important reason limiting its widespread application.

[0005] In addition, the working environment of floating wind turbines is very harsh. Often, a slight deterioration in the wind, wave and surge environment will cause the entire foundation and wind turbine to shake violently. In such an environment, the wind turbine can only stop running, resulting in a short power generation time, low efficiency and affected lifespan. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art, the utility model provides a novel offshore wind power semi-submersible wind turbine foundation, which realizes the balance of the wind turbine and the tower by arranging a balancing component and a damping component, greatly reduces vibration, and enables the wind turbine foundation to operate stably even in a large wind and wave environment.

[0007] A novel offshore wind power semi-submersible wind turbine foundation comprises a water tank foundation and a tower arranged on the water tank foundation, a wind turbine is arranged on the top of the tower, a fixed frame group is arranged on the water tank foundation, and the tower is suspended on the water tank foundation by cooperating with the fixed frame group through a balancing mechanism arranged thereon; the balancing mechanism and the fixed frame group can be rotatably matched, including an X-axis rotation adjustment component and a Y-axis rotation adjustment component, and a damping component is arranged at the bottom of the tower, and the tower realizes automatic shock absorption through the cooperation of the X-axis rotation adjustment component, the Y-axis rotation adjustment component and the damping component.

[0008] Furthermore, the damping assembly includes a counterweight foundation fixedly arranged at the bottom of the tower, the interior of the counterweight foundation is a cavity, and a balancing damper is suspended in the cavity.

[0009] Furthermore, the fixing frame group includes two sets of catheter frames which are symmetrically arranged, and a first shaft sleeve is arranged on the top of the catheter frame.

[0010] Furthermore, the X-axis rotation adjustment assembly includes an X-axis tube and a second sleeve integrally arranged in the middle of the X-axis tube, and the second sleeve is perpendicular to the direction of the first sleeve; the bearing groups at both ends of the X-axis tube can be rotatably sleeved in the first sleeve, and the X-axis tube and the second sleeve can rotate around the first sleeve.

[0011] Furthermore, the Y-axis rotation adjustment component includes a Y-axis tube, which is rotatably arranged in the second sleeve in conjunction with the bearing group, and the tower is radially penetrated and fixed in the middle of the Y-axis tube, so that the tower and the Y-axis tube rotate synchronously around the second sleeve.

[0012] Furthermore, the water tank foundation is a hollow square frame structure, including at least four ballast water tanks connected in series end to end, and a damping plate is integrally provided at the bottom of the ballast water tank.

[0013] Furthermore, the adjacent ballast water tanks are connected via a cross frame at the top, and the bottoms of adjacent ballast water tanks are connected via a pipeline.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] (1) This application abandons the traditional idea of ​​fixing the semi-submersible foundation and the wind turbine tower, and uses a ballast water tank for vibration reduction - dual-degree-of-freedom rotational vibration reduction - tower bottom damping assembly for vibration reduction. This three-layer layer-by-layer vibration reduction method minimizes the vibration of the wind turbine. Due to the presence of a balancing damper at the bottom of the tower, the previous problem of resonance between the blades and the foundation when the wind turbine is working is optimized, greatly improving the safety of the wind turbine during movement.

[0016] (2) The semi-submersible foundation method can reduce platform vibration while also having the advantage of being installed at the dock. There is no need for an installation vessel to work in complex sea conditions, which greatly saves costs and provides a new solution for the future exploration of deep-sea offshore wind power. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the structural diagrams of the utility model;

[0018] Figure 2 This is the second structural diagram of the utility model;

[0019] Figure 3 This is the third structural diagram of the utility model;

[0020] Figure 4 It is a schematic diagram of the connection between the balancing mechanism and the tower of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the balancing mechanism of the utility model;

[0022] Figure 6 It is a cross-sectional view of the damping component of the utility model.

[0023] In the figure: 1-water tank foundation, 11-ballast water tank, 12-damping plate, 13-cross frame, 14-pipeline, 2-tower, 3-fan, 4-fixed frame group, 41-duct frame, 42-first shaft sleeve, 5-balancing mechanism, 51-X-axis rotation adjustment assembly, 511-X-axis tube, 512-second shaft sleeve, 52-Y-axis rotation adjustment assembly, 521-Y-axis tube, 6-damping assembly, 61-counterweight foundation, 62-balancing damper. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the present invention is further described below in conjunction with the accompanying drawings.

[0025] like Figure 1-Figure 5 The embodiment shown is a novel offshore wind power semi-submersible wind turbine foundation, comprising a water tank foundation 1 and a tower 2 arranged on the water tank foundation 1, a wind turbine 3 is arranged on the top of the tower 2, a fixed frame group 4 is arranged on the water tank foundation 1, and the tower 2 is suspended on the water tank foundation 1 through a balancing mechanism 5 arranged thereon and in cooperation with the fixed frame group 4; the balancing mechanism 5 and the fixed frame group 4 can be rotatably matched, including an X-axis rotation adjustment component 51 and a Y-axis rotation adjustment component 52, and at the same time, a damping component 6 is arranged at the bottom of the tower 2, and the tower 2 realizes automatic shock absorption through the cooperation of the X-axis rotation adjustment component 51, the Y-axis rotation adjustment component 52 and the damping component 6.

[0026] like Figure 6As shown, the damping assembly 6 includes a counterweight foundation 61 fixedly arranged at the bottom of the tower 2. The interior of the counterweight foundation 61 is a cavity, and a balancing damper 62 is suspended in the cavity, that is, the balancing damper 62 is hung on the middle of the top wall of the counterweight foundation 61 through a sling / ropes.

[0027] Specifically, the fixed frame group 4 includes two groups of symmetrically arranged catheter frames 41, and a first sleeve 42 is arranged on the top of the catheter frame 41. The X-axis rotation adjustment component 51 includes an X-axis tube 511 and a second sleeve 512 integrally arranged in the middle of the X-axis tube 511, and the second sleeve 512 is perpendicular to the direction of the first sleeve 42; the two ends of the X-axis tube 511 are matched with the bearing group and can be rotatably sleeved in the first sleeve 42, and the X-axis tube 511 and the second sleeve 512 can rotate around the first sleeve 42. The Y-axis rotation adjustment component 52 includes a Y-axis tube 521, which is matched with the bearing group and can be rotatably arranged in the second sleeve 512, and the tower 2 and the middle of the Y-axis tube 521 are radially penetrated and fixed, so that the tower 2 and the Y-axis tube 521 rotate synchronously around the second sleeve 512.

[0028] It can be understood that the entire wind turbine tower 2 can rotate in two degrees of freedom around the X-axis tube 511 and the Y-axis tube 521. No matter which side the water tank foundation 1 is raised, the entire wind turbine can be perfectly maintained in the vertical direction through the rotation of two degrees of freedom, which greatly reduces the overall vibration of the wind turbine. Compared with the traditional wind turbine foundation, this application abandons the previous idea of ​​fixed connection between the tower and the platform foundation. A counterweight foundation 61 is installed at the bottom of the tower 2. A balancing damper 62 is suspended inside the counterweight foundation 61. Similar to the TMD damper installed on the top of the building, when vibration occurs, the balancing damper 62 moves in the opposite direction of the vibration, so that the entire wind turbine can not only be quickly balanced, but also avoid the harm of resonance with the rotation of the wind turbine blades.

[0029] In the present application, the water tank foundation 1 is a hollow square frame structure, including at least four ballast water tanks 11 connected in series end to end, and a damping plate 12 is integrally arranged at the bottom of the ballast water tank 11; adjacent ballast water tanks 11 are connected by a cross frame 13 at the top, and the bottoms of adjacent ballast water tanks 11 are connected by a pipe 14. A mooring device and a cable are arranged at the bottom of the ballast water tank 11 to cooperate with anchoring the entire wind turbine foundation, and a plurality of sensors with different functions are arranged on the ballast water tank 11 to collect various information of the water tank, such as water pressure, cable tension, etc., which play a key role in the control of the wind turbine foundation by the wind turbine control system (existing technology) and subsequent operation and maintenance.

[0030] The main function of the water tank foundation 1 is to change the draft depth of the platform and compensate for the errors of wind and wave forces. Under the combined effect of wind and wave forces, the wind turbine and the foundation as a whole change the water surface height of each ballast water tank 11 through the control system, and the liquids in different water tanks can also be transferred to each other through the pipeline 14. When the wind and waves are strong, the entire ballast water tank 11 is filled with water, and the entire water tank foundation 1 dives to increase stability; when the wind and waves are small, the ballast water tank 11 is drained, and the water tank foundation 1 floats to obtain more wind energy. The damping plate 12 at the bottom of the ballast water tank 11 minimizes the vibration of the entire device and improves the overall stability.

[0031] The specific construction process is as follows: after the entire wind turbine foundation is installed on land, it is transported to the dock by barge, and other components are transported to the dock by land transportation, that is, the fixed frame group 4 integrated with the X-axis rotation adjustment component 51 is installed on the basic platform (that is, the water tank foundation 1), and then the Y-axis rotation adjustment component 52 and the tower 2 are installed. After the tower 2 is fixedly connected to the Y-axis tube 521, the damping component 6 is installed first to maintain the stability of the entire tower 2. After the tower 2 is stable, the hub and blades of the wind turbine 3 are installed. After completion, sensors are added at designated locations to debug the equipment and collect data. After confirmation, the entire device is towed to the designated location by a tugboat to install the anchoring device and the chain to connect to the seabed.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A novel offshore wind power semi-submersible wind turbine foundation, comprising a water tank foundation (1) and a tower (2) arranged on the water tank foundation (1), a wind turbine (3) being arranged on the top of the tower (2), characterized in that: A fixing frame group (4) is arranged on the water tank foundation (1), and the tower (2) is suspended on the water tank foundation (1) by cooperating with the fixing frame group (4) through a balancing mechanism (5) arranged thereon; the balancing mechanism (5) and the fixing frame group (4) are rotatably matched, and include an X-direction rotation adjustment component (51) and a Y-direction rotation adjustment component (52); a damping component (6) is arranged at the bottom of the tower (2); and the tower (2) realizes automatic shock absorption through the cooperation of the X-direction rotation adjustment component (51), the Y-direction rotation adjustment component (52) and the damping component (6).

2. A novel offshore wind power semi-submersible wind turbine foundation according to claim 1, characterized in that: The damping assembly (6) comprises a counterweight foundation (61) fixedly arranged at the bottom of the tower (2); the interior of the counterweight foundation (61) is a cavity, and a balancing damper (62) is suspended in the cavity.

3. A novel offshore wind power semi-submersible wind turbine foundation according to claim 1, characterized in that: The fixed frame group (4) comprises two groups of catheter frames (41) which are symmetrically arranged, and a first shaft sleeve (42) is arranged on the top of the catheter frame (41).

4. A novel offshore wind power semi-submersible wind turbine foundation according to claim 3, characterized in that: The X-axis rotation adjustment component (51) comprises an X-axis tube (511) and a second shaft sleeve (512) integrally arranged in the middle of the X-axis tube (511), wherein the second shaft sleeve (512) is perpendicular to the first shaft sleeve (42); the two ends of the X-axis tube (511) are matched with bearing groups and can be rotatably sleeved in the first shaft sleeve (42), and the X-axis tube (511) and the second shaft sleeve (512) can rotate around the first shaft sleeve (42).

5. A novel offshore wind power semi-submersible wind turbine foundation according to claim 4, characterized in that: The Y-axis rotation adjustment component (52) comprises a Y-axis tube (521), the Y-axis tube (521) being rotatably arranged in the second shaft sleeve (512) in cooperation with the bearing group, and the tower barrel (2) and the middle part of the Y-axis tube (521) are radially penetrated and fixed, so that the tower barrel (2) and the Y-axis tube (521) rotate synchronously around the second shaft sleeve (512).

6. A novel offshore wind power semi-submersible wind turbine foundation according to any one of claims 1 to 5, characterized in that: The water tank foundation (1) is a hollow square frame structure, comprising at least four ballast water tanks (11) connected end to end in series, and a damping plate (12) is integrally provided at the bottom of the ballast water tank (11).

7. A novel offshore wind power semi-submersible wind turbine foundation according to claim 6, characterized in that: Adjacent ballast water tanks (11) are connected via a cross frame (13) at the top, and the bottoms of adjacent ballast water tanks (11) are connected via a pipe (14).

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