CN115853716A - An Offshore Floating Power Plant Integrated Motion Suppression System - Google Patents

Abstract

The invention discloses an offshore floating power generation device with an integrated motion suppression system, which relates to the technical field of offshore floating power generation, and specifically an offshore floating power generation device with an integrated motion suppression system, including a wind turbine and a floating platform. The unit includes fan blades, wind power generators, and wind turbine towers. The floating platform is composed of columns and truss structures that provide buoyancy. The interior of the columns is provided with damping cabins, and the bottom and top of the damping cabins are provided with openings. holes, and a damping grid is arranged at the opening at the bottom, and a turbine power generation system is arranged at the opening at the top of the damping chamber. The offshore floating power generation device with integrated motion suppression system has good stability. Through the cooperation between wind turbines, floating platforms, ballast tanks and truss structures, it combines offshore wind power generation with wave power generation, sharing The infrastructure, compared with the separate construction of the two devices, increases the power generation while reducing the construction cost.

Description

An Offshore Floating Power Plant Integrated Motion Suppression System

technical field

The invention relates to the technical field of offshore floating power generation, in particular to an offshore floating power generation device integrating a motion suppression system.

Background technique

At present, it has become a global consensus to take immediate actions to reduce greenhouse gas emissions and achieve sustainable energy development. Accelerating the development and utilization of renewable clean energy is one of the main means. Due to the huge and high density of offshore wind energy reserves, the development and utilization of offshore wind power has become an important area for the development of renewable energy. At the same time, offshore wind energy resources are superior to offshore ones. Therefore, places with abundant wind energy resources are often accompanied by high-quality wave energy.

For deep seas with a water depth of more than 50m, the floating wind turbine foundation has more advantages in construction cost than the fixed one. Large motion response, which will not only affect the overall stability of the floating wind turbine, but also cause a large acceleration where the wind turbine is located, affecting the life of the wind turbine. At the same time, the mooring system responds frequently, which is prone to stress fatigue. Even the anchor chain breaks.

Therefore, it is necessary to develop a technology that can efficiently and stably utilize wave energy near the floating platform while reducing the overall motion performance of the floating platform to increase wind energy utilization efficiency and prolong the life of wind turbines.

Contents of the invention

The present invention provides an offshore floating power generation device integrated with a motion suppression system, which solves the problems raised by the above-mentioned background technology.

In order to achieve the above object, the present invention is achieved through the following technical solutions: an offshore floating power generation device integrating a motion suppression system, including a wind turbine and a floating platform, and the wind turbine includes a fan blade, a wind generator, a wind turbine tower , the floating platform is composed of a column and a truss structure that provide buoyancy, and a damping cabin is provided inside the column, and openings are provided at the bottom and top of the damping cabin, and a damping grid is provided at the opening at the bottom grid, and a turbine power generation system is arranged at the opening on the top of the damping cabin.

Optionally, the output shaft of the wind generator is fixedly connected to one end of the fan blade, a fan tower is fixedly installed on the back of the wind generator, and the lower end of the fan tower is fixedly connected to the upper end of the column.

Optionally, the turbine power generation system includes an airflow duct and an air turbine, and the air turbine is installed inside the airflow duct, and a protection cabin is provided around the turbine generation system, and the protection cabin is provided with openings.

Optionally, the top of the truss structure is fixedly connected to the lower end of the column, and a ballast tank is fixedly installed at the end of the truss structure away from the column.

Optionally, the truss structure, columns, and bolts connecting the damping grid and the bottom opening of the damping chamber are all made of stainless steel.

Optionally, the air holes on the top of the damping cabin are airtightly connected to the turbine power generation system, the openings of the air holes at the bottom of the damping cabin are bolted to install the damping grid, and the main part of the damping grid is located in the damping cabin.

The present invention has the following beneficial effects:

1. The offshore floating power generation device with integrated motion suppression system, through the cooperation between the column, damping cabin and damping grille, uses the column, damping cabin and damping grille to form a motion suppression system, which effectively solves the problem of the floating power generation device. For problems affected by the marine environment, the method of increasing the additional mass of the platform to suppress the platform's motion performance can weaken the motion response of the floating platform, avoid the large acceleration of the wind turbine, and prolong the service life of the wind turbine under sea wind and waves.

2. The offshore floating power generation device with integrated motion suppression system, through the cooperation between wind turbines, floating platforms, damping cabins and damping grids, uses the installation of damping cabins and damping grids to increase the additional cost of the entire device. quality, so that the heave effect of the device under the action of waves is significantly reduced, which can not only improve the stability of the wind turbine, but also prolong its service life and reduce the maintenance cost of the device. stress fatigue occurs.

3. The offshore floating power generation device with integrated motion suppression system has good stability. It combines offshore wind power generation with wave power generation through the cooperation between wind turbines, floating platforms, ballast tanks and truss structures. , share the infrastructure, compared with the separate construction of the two devices, while increasing the power generation, the construction cost is reduced.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the schematic diagram of the three-dimensional structure of the damping grid in the structure of the present invention;

Fig. 3 is the cross-sectional view of the turbine power generation system in the structure of the present invention;

Fig. 4 is a cross-sectional view of the column integrating the damping cabin and the damping grid in the structure of the present invention.

In the figure: 1. Fan blade; 2. Wind generator; 3. Fan tower; 4. Turbine power generation system; 5. Column; 6. Truss structure; 7. Ballast tank; 8. Damping grid; 9. Air flow Pipeline; 10, air turbine; 11, damping cabin.

Implementation

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figure 1 and Figure 3, the present invention provides a technical solution: an offshore floating power generation device with an integrated motion suppression system, including a wind turbine and a floating platform, the wind turbine includes a fan blade 1, a wind generator 2, a wind turbine The tower 3 and the number of fan blades 1 are three. The floating platform is composed of a column 5 and a truss structure 6 that provide buoyancy. 11 The movement performance of the platform is suppressed by increasing the additional mass of the platform. The damping chamber 11 is a cylindrical air chamber with both top and bottom openings. Its top opening is above the water surface to connect to the turbine power generation system 4. In contact with seawater, the air column is closed on the upper part of the damping cabin 11. At the same time, the damping grille 8 is installed and fixed by bolts. The top opening area can be determined as 3% of the horizontal cross-section of the damping cabin 11 to achieve a better motion suppression effect, and the bottom opening is provided with a damping grid 8, and the integrated damping cabin 11 and damping grid 8 in the column 5 Form a motion suppression system, which suppresses the motion performance of the platform by increasing the additional mass of the platform. The damping grid 8 is connected by several damping plates to increase the additional mass of the device. The opening at the top of the damping cabin 11 is set The turbine power generation system 4, the column 5, the truss structure 6 and the turbine power generation system 4 fixed on the column 5 by bolts form a floating platform.

The output shaft of the wind generator 2 is fixedly connected to one end of the fan blade 1, the wind turbine tower 3 is fixedly installed on the back side of the wind generator 2, and the lower end of the fan tower 3 is fixedly connected to the upper end of the column 5, under the action of wind, The fan blade 1 rotates around the shaft, thereby converting the kinetic energy of the wind into mechanical energy, and then driving the wind rotor shaft in the wind generator 2 to rotate to generate electricity.

Turbine power generation system 4 comprises air flow duct 9 and air turbine 10, and air turbine 10 is installed in the inside of air flow duct 9, and the periphery of turbine power generation system 4 is provided with protection cabin, and protection cabin is provided with opening, and turbine power generation system 4 outside The protective cabin is provided with openings to allow the gas to circulate inside and outside. The turbine power generation system 4 is composed of an air flow duct 9 and an air turbine 10 inside it. The gas flow at the opening of the damping cabin 11 can drive the air turbine 10 to rotate, and then promote the generator. To generate electricity.

The top of the truss structure 6 is fixedly connected to the lower end of the column 5, and the truss structure 6 with the ballast tank is connected to the bottom of the column 5 to suppress the vortex-induced vibration of the platform and lower the center of gravity of the platform. The end of the truss structure 6 away from the column 5 is fixed and installed There is a ballast tank 7, and the setting of the truss structure 6 serves as a connection between the upright column 5 and the ballast tank 7.

Please refer to Fig. 2 and Fig. 4, the truss structure 6, the column 5, the bolts connecting the damping grid 8 and the bottom opening of the damping cabin 11 are all made of stainless steel. The strength of the bolts at the bottom opening of grid 8 and damping cabin 11 when in use.

The air hole on the top of the damping cabin 11 is airtightly connected with the turbine power generation system 4, and the water column in the damping cabin 11 will vibrate up and down, which is similar to the working state of the air chamber in the oscillating water column power generation device, so the turbine power generation system 4 is installed at the upper opening of the damping cabin 11 , to achieve the purpose of utilizing the wave energy near the floating fan support platform, bolts are used to install the damping grid 8 at the air hole opening at the bottom of the damping cabin 11, and the main part of the damping grid 8 is located in the damping cabin 11, the damping cabin 11, the damping grid The grid 8 and the column 5 of the turbine power generation system 4 play the role of carrying the wind turbine, restraining the platform's motion performance and capturing and utilizing wave energy.

In summary, when the offshore floating power generation device with integrated motion suppression system is used, firstly, the top opening of the damping cabin 11 has a larger diameter than the bottom opening, and the specific opening size can be adjusted according to actual needs; the damping grid 8 consists of several Each damping plate is connected by high-strength stainless steel bolts, and the specific number of damping plates can be adjusted according to needs, thereby further increasing the additional mass. Then, the turbine power generation system 4 is connected to the column 5 through high-strength stainless steel bolts, and the top of the damping cabin 11 is open. The connection with the gas flow pipe 9 is sealed and smoothed to ensure that the gas can enter stably, reduce resistance, and effectively improve power generation efficiency. Then, the turbine power generation system 4 can work under two-way air flow, and the gas can generate electricity when it flows out and in. Improve the power generation efficiency. Finally, when working normally under the action of wind, current and waves, the damping grid 8 and the damping cabin 11 can restrain the motion performance of the floating platform by increasing the additional mass of the platform, thereby improving the stability of the entire device. effect. Under the action of waves, the water column in the damping chamber 11 oscillates up and down, causing the internal air pressure to change, forcing the airflow duct 9 to generate reciprocating airflow, and then causing the installed air turbine 10 to rotate, thereby driving the generator to generate electricity.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, and therefore should not be construed as limiting the present invention; the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance, and unless otherwise Clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a Electrical connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (6)

1. An offshore floating power generation device with an integrated motion suppression system, including a wind turbine and a floating platform, characterized in that: the wind turbine includes a fan blade (1), a wind generator (2), a wind turbine tower (3 ), the floating platform is composed of a column (5) and a truss structure (6) that provide buoyancy. The interior of the column (5) is provided with a damping cabin (11), and the bottom and top of the damping cabin (11) Both are provided with openings, and a damping grid (8) is provided at the opening at the bottom, and a turbine power generation system (4) is provided at the opening at the top of the damping cabin (11). 2. An offshore floating power generation device with an integrated motion suppression system according to claim 1, characterized in that: the output shaft of the wind generator (2) is fixedly connected to one end of the fan blade (1), and the A fan tower (3) is fixedly installed on the back of the wind power generator (2), and the lower end of the fan tower (3) is fixedly connected to the upper end of the column (5). 3. An offshore floating power generation device with an integrated motion suppression system according to claim 1, characterized in that: the turbine power generation system (4) includes an air flow duct (9) and an air turbine (10), and the air The turbine (10) is installed inside the air flow duct (9), and a protection cabin is arranged around the turbine power generation system (4), and the protection cabin is provided with openings. 4. The offshore floating power generation device with integrated motion suppression system according to claim 1, characterized in that: the top of the truss structure (6) is fixedly connected to the lower end of the column (5), and the truss structure ( 6) A ballast tank (7) is fixedly installed at the end away from the column (5). 5. The offshore floating power generation device with integrated motion suppression system according to claim 1, characterized in that: the truss structure (6), the column (5), the connecting damping grid (8) and the damping cabin ( 11) Bolts at the bottom opening are made of stainless steel. 6. The offshore floating power generation device with integrated motion suppression system according to claim 1, characterized in that: the top air hole of the damping cabin (11) is airtightly connected with the turbine power generation system (4), and the damping cabin ( 11) Bolts are used to install the damping grid (8) at the opening of the air hole at the bottom, and the main part of the damping grid (8) is located in the damping cabin (11).

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