CN113428310B - Floating type fan platform based on suspension type vibration damper - Google Patents

Abstract

The invention belongs to the field of ship and ocean engineering, and provides a floating type fan platform based on a suspension type vibration damper, which comprises a wind turbine generator, a tower structure, a floating type platform and a mooring system; the floating platform mainly comprises a floating cylinder, an upper double-fork arm, a lower double-fork arm, a spring damping device and a platform central structure which move independently. The invention can enhance the motion performance of the floating platform and reduce the motion response of the floating fan under the action of wind and waves; reduce the interact between the flotation pontoon, can reduce the impact of floating fan platform to the pylon under the wave effect, can reduce the rocking of pylon under the torrent wind effect. The invention can effectively reduce the overall motion response of the floating type fan platform under waves, reduce the swing amplitude of the tower frame and enable the fan to be in a more stable working state, thereby improving the power generation efficiency and the safety of the fan.

Description

A floating fan platform based on suspended vibration damping device

technical field

The invention relates to the field of ships and marine engineering, in particular to the development and utilization of marine wind energy and the sea resistance of marine structures, in particular to a floating fan platform based on a suspension vibration damping device.

Background technique

Wind energy is a kind of renewable and clean energy. my country's offshore wind energy reserves are huge. Offshore wind power at a water depth of 5m-50m and a height of 70m is expected to develop 500 million kilowatts of resources. However, as the water depth increases and the development of nearshore resources tends to be saturated, the disadvantage of the fixed foundation is obvious, and the floating foundation becomes the best choice. However, the development of floating wind turbines faces many technical challenges. Europe has carried out offshore floating prototype tests more than ten years ago, and has accumulated rich design experience, but there is still no mass production. The floating wind turbine adopts a mooring system to fix it on the seabed. Under the action of wind and waves, the wind turbine platform moves within a certain range. However, floating projects in the East my country Sea and South China Sea are generally faced with shallow water, harsh marine environment in the engineering sea area, and typhoons. Frequent occurrence and many other unfavorable factors aggravate the motion response of the platform and seriously affect the working efficiency and safety of the fan. Therefore, studying how to reduce the motion response amplitude of wind turbines and platforms under the action of waves and wind is the key technology for the design and development of floating wind turbines.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a floating fan platform based on a suspension vibration damping device, which is suitable for the medium water depth areas of the East my country Sea and the South China Sea, and can resist the interference of typhoons and reduce the motion response of the floating fan under wind and waves. The floating fan platform has excellent motion performance and obvious anti-sway effect, which can effectively improve the working efficiency and safety of the fan.

The technical solution of the present invention: a floating wind turbine platform based on a suspension vibration damping device includes a wind turbine 1, a tower 2, a floating platform and a mooring system 8; the floating platform includes a spring damping device 3, an upper double wishbone 4. The lower double wishbone 5, the platform center structure 6 and the buoy 7; the platform center structure 6 is a triangular prism structure, and the base is installed on the upper surface; the tower 2 is fixed on the base; The upper end of the buoy 7 and the other end are respectively hinged at the two vertices of the upper end of the platform central structure 6, and the two vertices are close to the hinged side of the buoy 7; 6 at the two apexes of the lower end, the two apexes are close to the hinged buoy 7 side; the upper double wishbone 4 and the lower double wishbone 5 swing up and down, thereby making the buoy 7 move up and down, while limiting the displacement and rotation of the buoy 7 in the horizontal plane; The spring damping device 3 is located above the water surface; the tower 2 and the upper part of the buoy 7 are hinged through the spring damping device 3 ; the floating platform is anchored on the seabed by the mooring system 8 .

The floating fan platform includes three or more buoys 7. The connection mode of the three buoys has changed from the previous welding to form an integral way to hinged so that they can move independently. The independent movement of each buoy can reduce the friction between the buoy and the buoy. Mutual influence; each buoy 7 and the tower 2 are connected by a mechanism and a spring damping device 3 to reduce the displacement transmission between the platform and the tower 2, thereby realizing energy absorption and buffering, reducing the motion response of the fan, and realizing The purpose of stabilization.

Considering the harsh marine environment in which the floating fan is actually located, one end of the spring damping device 3 is moved upward from the position 5 of the lower fork arm to the position of the upper fork arm 4, and then the other end connected to the tower 2 is also moved upward, so as to avoid The contact between the spring damping device 3 and the seawater is reduced, corrosion is slowed down, and the connection point is raised to increase the support for the tower 2 .

The beneficial effects of the present invention are as follows: the present invention provides a floating wind turbine platform based on a suspension vibration damping device. By redesigning the structure of the existing semi-submersible platform, each buoy can move independently, thereby reducing the The mutual influence between the buoys enhances the mobility of the platform; secondly, the double wishbone suspension structure is used to connect the buoys and the central structure of the platform. It can realize the functions of energy consumption and buffering, reduce the displacement transmission between each buoy and the tower, and improve the stability of the fan. The invention is simple in principle, ingenious in structural design and convenient in use, can effectively reduce the motion response of the floating fan under environmental load, improve power generation efficiency and safety, and play an important role in the development and utilization of offshore wind energy.

Description of drawings

FIG. 1 is an overall three-dimensional view of a floating fan platform based on a suspension vibration damping device of the present invention.

In the picture: 1 wind turbine; 2 tower; 3 spring damping device; 4 upper double wishbone; 5 lower double wishbone; 6 platform center structure; 7 pontoon; 8 mooring system

Detailed ways

In order to deepen the understanding of the present invention, the present invention will be further described below with reference to the accompanying drawings and technical solutions.

Description of the structural design of the present invention: A floating wind turbine platform based on a suspension vibration damping device, as shown in FIG. 1 , includes a wind turbine 1 , a tower 2 , a floating platform and a mooring system 8 . The floating platform includes a spring damping device 3 , an upper double wishbone 4 , a lower double wishbone 5 , a platform central structure 6 and a buoy 7 . The platform central structure 6 is a triangular prism structure, and the base is installed on the upper surface; the tower 2 is fixed on the base, and the tower 2 and the platform central structure 6 form a whole; one end of the upper double wishbone 4 is jointly hinged to the upper end of the buoy 7, The other end is hinged to the two vertices of the upper end of the platform central structure 6 respectively, and the two vertices are close to the hinged buoy 7 side; one end of the lower double wishbone 5 is jointly hinged to the lower end of the buoy 7, and the other end is hinged to the two vertices of the lower end of the platform central structure 6 respectively. The upper and lower double wishbone 4 and the lower double wishbone 5 swing up and down, so as to make the pontoon 7 move up and down, and at the same time limit the displacement and rotation of the pontoon 7 in the horizontal plane; the spring damping device 3 Located above the water surface; the tower 2 and the upper part of the buoy 7 are hinged through a spring damping device 3; the floating platform is anchored to the seabed through a mooring system 8

The working process of the present invention: the working principle of the floating fan platform based on the suspension vibration damping device proposed here is simple and clear. First, each buoy 7 of the platform can move up and down independently, and there is no mutual between the buoys. Influence, and limit the displacement and turning angle of the buoy 7 in other directions; when the wave passes through the platform, if one buoy is located at the crest of the wave and the other is located at the trough, the existing one-piece semi-submersible platform is bound to have a significant inclination. However, in the platform proposed by the present invention, since each buoy 7 moves up and down independently of each other, the tilt angle of the platform under the action of waves is reduced to the greatest extent; secondly, a spring damping device is used between each buoy 7 and the tower 2 3 connection, which is a key part of the entire platform design. When the buoy 7 moves up and down in the waves, the presence of the spring damper 3 reduces the impact of the buoy 7 on the tower 2, which can absorb energy and reduce vibration. The sway of the upper structure of the wind turbine caused by the tilt of the platform is small; in addition, when the non-constant thrust caused by the turbulent wind field acts on the wind turbine 1 and the tower 2, due to the existence of the spring damping device 3, the tower 2 has a negative impact on the platform. Impact forces are partially absorbed, thereby reducing platform tilt caused by swaying of the wind turbine superstructure.

To sum up, the function of the present invention is to significantly reduce the motion response of the offshore floating wind turbine under the action of wind and waves, and improve its stability. The floating platform is designed in the form of multiple rigid bodies and connected by spring dampers, which increases the motion damping of the fan platform, improves the motion performance of the platform, and effectively reduces the motion response of the floating fan platform under waves, so that the fan is in the More stable working state, improve the working efficiency and safety of the fan. The present invention is also applicable to other types of marine structures such as marine platforms.

Claims (2)

1. A floating type fan platform based on a suspension type vibration damper is characterized by comprising a wind turbine generator (1), a tower frame (2), a floating type platform and a mooring system (8); the floating platform comprises a spring damping device (3), an upper double-fork arm (4), a lower double-fork arm (5), a platform central structure (6) and a buoy (7); the platform central structure (6) is a triangular prism structure, and a base is arranged on the upper surface of the platform central structure; the tower (2) is fixed on the base; one end of the upper double-fork arm (4) is hinged to the upper end of the floating drum (7) together, the other end of the upper double-fork arm is hinged to two top points of the upper end of the platform central structure (6) respectively, and the two top points are close to the sides of the hinged floating drum (7); one end of the lower double fork arm (5) is hinged to the lower end of the floating cylinder (7) together, the other end of the lower double fork arm is hinged to two top points of the lower end of the platform central structure (6) respectively, and the two top points are close to the sides of the hinged floating cylinder (7); the upper double-fork arm (4) and the lower double-fork arm (5) swing up and down, so that the buoy (7) moves up and down, and the displacement and rotation of the buoy (7) in a horizontal plane are limited; the spring damping device (3) is positioned above the water surface; the tower (2) is hinged with the upper part of the buoy (7) through a spring damping device (3); the floating platform is anchored to the seabed by means of a mooring system (8).

2. A floating wind turbine platform based on suspended vibration dampers according to claim 1 characterized in that it comprises three and more pontoons (7) with independent movement between each pontoon (7).

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