A floating vertical axis wind turbine

Abstract

The utility model discloses a floating vertical axis wind turbine, comprising an anchor chain fixed to a seabed or lakebed, a floating platform, a tower mounted on the floating platform, a generator, blades, and a blade support rod for supporting the blades, wherein a bearing seat is mounted on the top of the tower, a rotating shaft is mounted on the bearing seat through a bearing, a blade support rod is fixed on the upper part of the rotating shaft, an intermediate shaft is connected to the lower end of the rotating shaft, the rotating shaft is arranged vertically and axially fixed, the intermediate shaft and the rotating shaft are coaxial and connected to a generator set, and the generator set is arranged on the upper part of the floating platform or the lower part of the tower. The utility model utilizes the characteristics of the vertical arrangement of the rotating shaft of the vertical axis wind turbine and the full wind direction operation, and sets the cabin at the lower part of the tower or the floating platform, which greatly reduces the center of gravity of the wind turbine, reduces the cost of the floating wind turbine, and enables the present invention to operate in shallow water areas, with better environmental adaptability and maintainability.

Description

Technical Field

[0001] The present invention relates to a floating vertical axis wind turbine, which is mainly used in floating vertical axis wind turbines floating in oceans and lakes, and can improve the stability of the wind turbine, simplify the wind turbine structure, and reduce the cost of the wind turbine. Background Art

[0002] At present, there are two main types of offshore wind turbines: fixed wind turbines and floating wind turbines. The foundation of a fixed wind turbine is inserted into the seabed mudflats and is fixed and immovable, mainly suitable for offshore shallow water areas; the entire wind turbine system of a floating wind turbine floats on the water surface, and the stability of the wind turbine is mainly ensured by the underwater ballast structure and mooring system, which is generally suitable for offshore deep water areas. With the reduction of offshore wind resources and the maturity of wind turbine technology, the widespread application of floating wind turbines has become a trend. However, conventional floating wind turbines mostly use horizontal axis wind turbines. Facilities such as the cabin are arranged at the highest point of the wind turbine and rotate with the change of wind direction. They need to be driven to the windward direction by the yaw mechanism. The center of gravity of the entire wind turbine is very high and floats on the water. A huge underwater ballast and mooring system is required to maintain stability. Due to the huge underwater ballast and mooring system and the inconvenience of installation, conventional floating wind turbines are too expensive, and they are often only suitable for deep water areas. In shallow offshore areas due to insufficient water depth, they cannot be promoted and applied. Utility Model Content

[0003] In order to solve the deficiencies of the aforementioned technologies, the present invention provides a floating vertical axis wind turbine. By utilizing the characteristics of the vertical arrangement of the rotating shaft of the vertical axis wind turbine and its operation in all wind directions, the cabin is arranged at the bottom of the tower or in the floating platform, which greatly reduces the center of gravity of the wind turbine, thereby simplifying the floating platform and the mooring system, and achieving the purpose of improving the stability of the wind turbine and reducing the cost of the floating wind turbine. At the same time, since a smaller floating platform can be used to support the operation of the wind turbine, the floating vertical axis wind turbine of the present invention can be used in shallow water areas, and has better environmental adaptability and maintainability.

[0004] The utility model is achieved in this way:

[0005] A floating vertical axis wind turbine comprises an anchor chain fixed to a seabed or a lakebed, a floating platform, a tower mounted on the floating platform, a generator set, a plurality of blades, and a plurality of blade support rods for supporting the blades. The wind turbine is characterized in that a bearing seat is mounted on the top of the tower, a rotating shaft is mounted on the bearing seat through a bearing, a blade support rod is fixed to the upper part of the rotating shaft, an intermediate shaft is connected to the lower end of the rotating shaft, the rotating shaft is vertically arranged and axially fixed, the intermediate shaft and the rotating shaft are coaxial and connected to the generator set, and the generator set is arranged on the upper part of the floating platform or the lower part of the tower.

[0006] During operation, the buoy floats on the water surface. Under the action of wind, the blades drive the blade support rods to rotate, the blade support rods drive the rotating shaft to rotate, and the rotating shaft drives the intermediate shaft and the generator set to rotate.

[0007] In order to improve the dynamic performance of the wind turbine, simplify the blade support structure, and reduce the weight of the blade support rod, preferably, the floating vertical axis wind turbine is provided with an inclined blade support rod arranged obliquely upward, and the inclined blade support rod is connected to a pull rod.

[0008] Preferably, the inclined blade support rod is arranged at the upper end of the rotating shaft, so that the length of the rotating shaft can be relatively reduced.

[0009] Preferably, the floating vertical axis wind turbine further comprises a clutch, wherein the clutch connects the intermediate shaft and the rotating shaft of the generator set.

[0010] Preferably, the floating platform includes a cabin, a buoyancy tank, and a ballast tank arranged from top to bottom.

[0011] The engine room is used to arrange the generator set and control equipment, etc. When the required engine room area is relatively small, preferably, the engine room diameter is smaller than the diameter of the buoyancy tank and the ballast tank.

[0012] Preferably, the ballast tank comprises split ballast blocks and fixed ballast. During on-site installation, the cabin can be transformed from a horizontal type to a vertical type by gradually adding split ballast blocks, and the wind turbine can also obtain appropriate overall stability by adding or reducing split ballast blocks.

[0013] The beneficial effects of the present invention are:

[0014] Compared with the prior art, the present invention is a floating vertical axis wind turbine. By utilizing the characteristics of the vertical arrangement of the rotating shaft of the vertical axis wind turbine and its operation in all wind directions, the cabin is arranged at the bottom of the tower or in the floating platform, which greatly reduces the center of gravity of the wind turbine, simplifies the floating platform and mooring system, improves the stability of the floating wind turbine, and reduces the cost of the floating wind turbine. Secondly, since a smaller floating platform can be used to support the operation of the wind turbine, the present invention can operate in shallow water areas and has better environmental adaptability and maintainability. Moreover, by arranging inclined blade support rods and pull rods, the weight of the wind turbine is further reduced, and the economy of the entire system is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a partial structural schematic diagram of the present invention including the inclined blade support rod and the pull rod;

[0018] Figure 3 It is a schematic diagram of arranging an inclined blade support rod at the top end of the transmission shaft according to the present invention.

[0019] In the figure, 1-blade, 2-blade support rod, 3-rotating shaft, 4-bearing seat, 5-tower, 6-intermediate shaft, 7-generator set, 8-floating platform, 9-anchor chain, 10-pull rod, 11-clutch, 201-horizontal blade support rod, 202-inclined blade support rod, 801-cabin, 802-floating tank, 803-ballast tank, 813-split ballast block, 823-fixed ballast. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. The scope of protection of the present invention is not limited thereto, and all equivalent changes and deformations fall within the scope of protection of the present invention.

[0021] like Figure 1 As shown, a floating vertical axis wind turbine includes an anchor chain 9 fixed to a seabed or a lakebed, a floating platform 8, a tower 5 installed on the floating platform, a generator set 7, a plurality of blades 1, and a plurality of blade support rods 2 for supporting the blades. A bearing seat 4 is installed on the top of the tower 5, and a rotating shaft 3 is installed on the bearing seat 4 through a bearing. The blade support rod 2 is fixed to the upper part of the rotating shaft 3, and the lower end of the rotating shaft 3 is connected to an intermediate shaft 6. The rotating shaft 3 is vertically arranged and axially fixed. The intermediate shaft 6 is coaxial with the rotating shaft 3 and is connected to the generator set 7. The generator set 7 is arranged on the upper part of the floating platform 8 or the lower part of the tower 5.

[0022] During operation, the buoy floats on the water surface. Under the action of wind, the blades drive the blade support rods to rotate, the blade support rods drive the rotating shaft to rotate, and the rotating shaft drives the intermediate shaft and the generator set to rotate.

[0023] In order to improve the dynamic performance of the wind turbine, simplify the blade support structure, and reduce the weight of the blade support rod, preferably, as Figure 2As shown, the floating vertical axis wind turbine is provided with an inclined blade support rod 202 arranged obliquely upward, and the inclined blade support rod 202 is connected with a tie rod 10. Relatively speaking, the horizontal blade support rod 201 mainly bears bending deformation, while the inclined blade support rod 202 mainly bears compression deformation. The inclined blade support rod 202 is mainly subjected to the pre-tightening tension of the tie rod 10, the blade gravity and the wind force. In actual use, the inclined blade support rod 202 and the horizontal blade support rod 201 are used in combination, so that the inclined blade support rod 202 bears vertical loads such as blade gravity, while the horizontal blade support rod 201 is less subjected to vertical loads, and the bending deformation of the horizontal blade support rod 201 is correspondingly reduced. Although the inclined blade support rod 202 is longer than the horizontal blade support rod 201, the cross-sectional area of ​​the blade support rod can be reduced through the tie rod structure, the weight of the blade support rod can be reduced, and the dynamic performance of the wind turbine can be improved. The role of the tie rod 10 is similar to that of the cable in a cable-stayed bridge.

[0024] like Figure 3 As shown, preferably, the inclined blade support rod 202 is arranged at the upper end of the rotating shaft 3. In this way, the length of the rotating shaft can be relatively reduced.

[0025] like Figure 2 As shown, preferably, the floating vertical axis wind turbine further comprises a clutch 11, and the clutch 11 connects the intermediate shaft 6 and the rotating shaft of the generator set 7. Since the self-starting ability of the vertical axis wind turbine is relatively poor, when starting, the clutch 11 can be disengaged, started without load, and then the clutch 11 can be engaged after rotating to a suitable speed, so as to drive the generator set 7 and other loads to operate.

[0026] like Figure 1 As shown, preferably, the floating platform 8 includes a cabin 801, a buoyancy tank 802, and a ballast tank 803 arranged from top to bottom.

[0027] like Figure 2 As shown, the cabin is used to arrange the generator set and control equipment, etc. When the required cabin area is relatively small, preferably, the diameter of the cabin 801 is smaller than the diameter of the buoyancy tank 802 and the ballast tank 803.

[0028] like Figure 2 As shown, preferably, the ballast tank 803 includes split ballast blocks 813 and fixed ballast 823. During on-site installation, the nacelle 8 is transformed from a horizontal type to a vertical type by gradually adding split ballast blocks, and the wind turbine can also obtain appropriate stability by adding or reducing split ballast blocks 813.

Claims

1. A floating vertical axis wind turbine, comprising an anchor chain (9) fixed to a seabed or a lakebed, a floating platform (8), a tower (5) mounted on the floating platform, a generator set (7), a plurality of blades (1), and a plurality of blade support rods (2) for supporting the blades, characterized in that: A bearing seat (4) is installed on the top of the tower (5); a rotating shaft (3) is installed on the bearing seat (4) via a bearing; a blade support rod (2) is fixed on the upper part of the rotating shaft (3); an intermediate shaft (6) is connected to the lower end of the rotating shaft (3); the rotating shaft (3) is arranged vertically and axially fixed; the intermediate shaft (6) and the rotating shaft (3) are coaxial and connected to a generator set (7); and the generator set (7) is arranged on the upper part of the floating platform (8) or the lower part of the tower (5).

2. A floating vertical axis wind turbine according to claim 1, characterized in that: An inclined blade support rod (202) arranged obliquely upward is provided, and a pull rod (10) is connected to the inclined blade support rod (202).

3. A floating vertical axis wind turbine according to claim 2, characterized in that: The inclined blade support rod (202) is arranged at the upper end of the rotating shaft (3).

4. A floating vertical axis wind turbine according to claim 1, characterized in that: It also includes a clutch (11), wherein the clutch (11) connects the intermediate shaft (6) and the rotating shaft of the generator set (7).

5. A floating vertical axis wind turbine according to claim 1, characterized in that: The floating platform (8) comprises a cabin (801), a buoyancy tank (802), and a ballast tank (803) arranged from top to bottom.

6. A floating vertical axis wind turbine according to claim 5, characterized in that: The diameter of the engine room (801) is smaller than the diameters of the floating tank (802) and the ballast tank (803).

7. A floating vertical axis wind turbine according to claim 5, characterized in that: The ballast tank (803) includes a split ballast block (813) and a fixed ballast (823).

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