阅读说明：本技术 一种海上浮式平台立柱减振垂荡板及波浪能收集装置 (Offshore floating platform stand damping heave plate and wave energy collection device ) 是由 韩彦青 徐胜男 楚胜涛 于 2021-09-22 设计创作，主要内容包括：本发明涉及海上浮式平台技术领域,且公开了一种海上浮式平台立柱减振垂荡板及波浪能收集装置。所述浮式平台由多个立柱、连接撑及系泊缆绳组成。所述立柱由内部固定隔板分隔成上下两个舱室,上部为封闭舱室,可为平台提供浮力,下部为半开放舱室,下部舱室底板中心处开口并设置有上反板,该海上浮式平台立柱减振垂荡板及波浪能收集装置,通过调谐设置振荡弹簧刚度及垂荡板质量,使垂荡板与立柱间形成反向共振,将立柱在波浪作用下的运动能量通过反向共振传递至垂荡板运动,可有效减小浮式平台的运动。垂荡板的运动能量则通过下部舱室内的圆筒型直线发电机组吸收,实现对波浪能的转化利用。(The invention relates to the technical field of offshore floating platforms, and discloses an offshore floating platform upright post vibration reduction heave plate and a wave energy collecting device. The floating platform consists of a plurality of upright posts, connecting struts and mooring cables. The floating platform is characterized in that the upright column is divided into an upper cabin and a lower cabin by an internal fixed partition plate, the upper part of the upright column is a closed cabin and can provide buoyancy for the platform, the lower part of the upright column is a semi-open cabin, the center of a bottom plate of the lower cabin is provided with an opening and an upper counter plate, the vibration reduction heave plate and the wave energy collecting device of the offshore floating platform upright column are provided with the rigidity of an oscillating spring and the mass of the heave plate through tuning, so that reverse resonance is formed between the heave plate and the upright column, the motion energy of the upright column under the action of waves is transmitted to the heave plate through the reverse resonance, and the motion of the floating platform can be effectively reduced. The motion energy of the heave plate is absorbed by a cylindrical linear generator set in the lower cabin, so that the conversion and utilization of the wave energy are realized.)

1. The utility model provides an offshore floating platform stand damping heave plate and wave energy collection device, includes a plurality of stands (1), connects and props (2) and mooring rope (3) and constitute its characterized in that: two cabins about stand (1) is separated into by inside fixed baffle (4), and lower part cabin bottom plate (5) center department opening is provided with deflector (6), the lower part of fixed baffle (4) is connected with below disc (9) through a plurality of oscillating spring (7) and cylindrical linear generator set (8), disc (9) link to each other with the board (11) of dangling through connecting rod (10) to can slide from top to bottom along the inside track in cabin (12), be equipped with air pump group (13) in the upper portion cabin, air pump group intake pipe (14) communicate with each other with platform top atmosphere to link to each other with the lower part cabin through outlet duct (15), be equipped with air pressure monitoring devices (16) in the lower part cabin in real time monitoring.

2. The offshore floating platform stand damping heave plate and wave energy collection device of claim 1, wherein: the cabin at the upper part of the fixed partition plate (4) is a closed cabin and can provide buoyancy for the platform; the cabin at the lower part of the fixed partition plate (4) is a semi-open cabin, the diameter of an opening at the center of a bottom plate (5) of the lower cabin is slightly larger than that of the connecting rod, and an upper reverse plate (6) is arranged, so that a certain water seal height is always kept in the cabin, gas in the lower cabin is prevented from escaping, and a space is provided for the oscillating spring (7) and the cylindrical linear generator set (8).

3. The offshore floating platform stand damping heave plate and wave energy collection device of claim 1, wherein: through the tuning setting of the rigidity of the oscillating spring (7) and the mass of the heave plate (11), reverse resonance is formed between the heave plate (11) and the upright post (1), and the motion energy of the upright post (1) under the action of waves is transmitted to the heave plate (11) to move through the reverse resonance.

4. The offshore floating platform stand damping heave plate and wave energy collection device of claim 1, wherein: the motion energy transmitted to the heave plate (11) by the upright post (1) is absorbed by a cylindrical linear generator set (8) in a lower cabin, so that the conversion and utilization of wave energy are realized.

5. The offshore floating platform stand damping heave plate and wave energy collection device of claim 4, wherein: the dead axle of cylinder type linear generator set (8) is installed in fixed baffle (4) below, and the moving axis of cylinder type linear generator set (8) is installed in disc (9) top, and oscillating spring (7) are installed between fixed baffle (4) and disc (9).

6. The offshore floating platform stand damping heave plate and wave energy collection device of claim 1, wherein: the diameter of the disc (9) is smaller than that of the inner wall of the upright post, and the inner wall of the upright post (1) is provided with a track (12) for the disc (9) to slide up and down so as to prevent the disc (9) from rotating along the axial direction.

7. The offshore floating platform stand damping heave plate and wave energy collection device of claim 1, wherein: when the lower cabin internal air pressure monitoring device (16) monitors that the air pressure is insufficient, the lower cabin can be inflated and pressurized to keep a certain water seal height through the upper cabin internal air pump set (13) through the air inlet pipe (14) and the air outlet pipe (15).

Technical Field

The invention relates to the technical field of offshore floating platforms, in particular to an upright post vibration damping heave plate of an offshore floating platform and a wave energy collecting device.

Background

In order to develop and utilize ocean resources to a greater extent, the offshore development will be developed to a deeper sea area in the future. However, as the water depth increases, the difficulty of constructing the fixed offshore platform increases greatly. The offshore floating platform can overcome the defect that the foundation structure installed on the seabed is influenced by water depth, so that the construction of the offshore platform can be developed to a deep sea area, and therefore, the offshore floating platform is paid attention to the research of the offshore floating platform. However, as a large floating body structure on the sea, the structure cannot be prevented from vertical movement (referred to as heaving) caused by the influence of sea waves. In the prior art, the heave plate is installed below the sea surface to increase the mass (or called additional mass) of the attached water of the offshore floating platform in the vertical motion direction, so as to increase the natural heave period of the floating platform, avoid the period range of wave energy concentration, increase the viscous resistance of the floating platform when heave occurs, reduce the vertical oscillation amplitude generated by the floating platform, and improve the vibration of the offshore floating platform in the heave direction.

However, in the prior art, the installation and arrangement of the heave plate are fixed at the lower part of the upright post, along with the synchronous motion of the upright post, the increase of the additional mass and viscous damping caused by the arrangement of the heave plate is small, the dissipation of motion energy generated by the action of wave load on the floating platform is small, and the damping effect is general. If the part of motion energy can be absorbed, the aim of effectively damping vibration can be achieved, and the conversion and utilization of wave energy can be realized. Therefore, there is a need for a heave plate structure of an offshore floating platform to effectively solve the disadvantages of the conventional heave plate that the damping effect is general and the motion energy cannot be converted and utilized.

Disclosure of Invention

The invention provides an offshore floating platform upright post vibration reduction heave plate and a wave energy collecting device, which have the advantages of effectively increasing the additional mass and viscous damping of a floating platform, thereby improving the vibration suppression effect of the heave plate on the floating platform, improving the resistance of the heave plate on sea waves, and having higher stability and safety, and realizing the conversion and utilization of wave energy. The defects that in the prior art, the heave plate is fixedly arranged at the lower part of the upright post, the additional mass and viscous damping are increased slightly along with the synchronous motion of the upright post, the motion energy generated by the floating platform under the action of wave load is low in dissipation, and the vibration reduction effect is general are overcome. Meanwhile, the floating platform upright column transmits the motion energy to the heave plate through reverse resonance, and finally the motion energy is absorbed by the cylindrical linear generator set, so that the conversion and utilization of the wave energy are realized.

The technical scheme is as follows:

the invention provides the following technical scheme: the stand columns are divided into an upper cabin and a lower cabin by internal fixed partition plates, the lower parts of the fixed partition plates are connected with a lower circular disc through a plurality of oscillating springs and a cylindrical linear generator set, the circular disc is connected with the heaving plate through a connecting rod and can slide up and down along a lower cabin inner rail, an air pump set is arranged in the upper cabin, an air inlet pipe is communicated with the atmosphere at the top of the platform, an air outlet pipe is connected with the lower cabin, and an air pressure monitoring device is arranged in the lower cabin and monitors the air pressure in the lower cabin in real time.

Preferably, the cabin on the upper part of the fixed partition board is a closed cabin which can provide buoyancy for the platform, the opening is arranged at the center of the bottom board of the cabin on the lower part of the fixed partition board, and the upper reverse board is arranged, so that a certain water seal height is always kept in the cabin, the gas in the cabin on the lower part is prevented from escaping, and a space is provided for the oscillating spring, the cylindrical linear generator set and the like.

Preferably, through tuning the rigidity of the oscillating spring and the mass of the heave plate, reverse resonance is formed between the heave plate and the upright post, the motion energy of the upright post under the action of the wave load is transferred to the heave plate through the reverse resonance, and the motion of the floating platform can be effectively reduced.

Preferably, the motion energy transmitted to the heave plate by the upright post is absorbed by a cylindrical linear generator set in the lower cabin, so that the conversion and utilization of the wave energy are realized.

Preferably, the diameter of the disc is smaller than that of the inner wall of the upright post, and the inner wall of the upright post is provided with a track for the disc to slide up and down so as to prevent the disc from rotating along the axial direction.

Preferably, when the air pressure monitoring device in the lower cabin monitors that the air pressure is insufficient, the air pump can be used for inflating and pressurizing the lower cabin through the air inlet pipe and the air outlet pipe, so that the lower cabin keeps a certain water seal height.

Has the advantages that:

the invention has the following beneficial effects:

1. this board and wave energy collection device are swung to marine floating platform stand damping, through will swinging the board and stand separation, increase bigger additional mass and viscous damping to through the oscillating spring of tuning (having the meaning of adjusting harmoniously, what adopted is the saying of harmonious mass damper) and swinging the board quality, the motion that makes the stand transmits the motion of swinging the board through the back resonance phenomenon, reaches the effect that effectively reduces the platform motion.

2. According to the offshore floating platform upright post vibration reduction heave plate and the wave energy collecting device, the cylindrical linear generator set device is arranged in the cabin at the lower part of the upright post, so that the motion energy transmitted to the heave plate through the reverse resonance phenomenon can be absorbed, and the effect of wave energy conversion and utilization is achieved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of the invention at point A in FIG. 1;

FIG. 3 is a schematic diagram of the inventive structure at the peak;

FIG. 4 is a schematic sketch of the structure of the present invention in a trough;

in the figure: 1. a column; 2. connecting a support; 3. mooring lines; 4. fixing the partition board; 5. a lower deck floor; 6. an upper counter plate; 7. an oscillating spring; 8. a cylindrical linear generator set; 9. a disc; 10. a connecting rod; 11. a heave plate; 12. a track; 13. an air pump unit; 14. an air inlet pipe; 15. an air outlet pipe; 16. an air pressure monitoring device; p, sea wave lines; w, gas-water interface line in the lower cabin.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the device for damping heave plate and collecting wave energy on the columns of the offshore floating platform comprises a plurality of columns 1, wherein the columns 1 form the floating platform through connecting supports 2, and the sides of the columns are connected with the bottom of the seabed through mooring cables 3 so as to limit the floating platform in the sea area of a certain area. The upright column 1 is divided into an upper cabin and a lower cabin by an internal fixed partition plate 4, the upper cabin is a closed cabin and provides buoyancy for the platform, the lower cabin is a semi-open cabin, the diameter of an opening in the center of a bottom plate 5 of the lower cabin is slightly larger than that of a connecting rod, and an upper counter plate 6 is arranged. The lower part of the fixed partition plate 4 is connected with a lower disc 9 through a plurality of oscillating springs 7 and a cylindrical linear generator set 8, and the disc 9 is connected with a heave plate 11 through a connecting rod 10 and can slide up and down along a cabin inner rail 12. And an air pump set 13 is arranged in the upper cabin and is communicated with the atmosphere at the top of the platform through an air inlet pipe 14, an air outlet pipe 15 is connected with the lower cabin, and an air pressure monitoring device 16 is arranged in the lower cabin and monitors the air pressure in the lower cabin in real time.

In this technical scheme, stand 1 is separated into two cabins about from 4 by inside fixed partition, and upper portion cabin is inside can set up partial wall to increase structural strength, rigidity and broken cabin stability. The diameter of the opening at the center of the lower cabin bottom plate 5 is slightly larger than that of the connecting rod 12, the size of the opening of the lower cabin is reduced, and the upper reflection plate 6 is arranged at the opening, so that the upright column 1 can still keep a certain water seal (water body seal) height when inclined at a large angle, namely, the stability of an air-water interface line W can effectively prevent the escape of air in the lower cabin, and spaces are provided for the oscillating spring 7, the cylindrical linear generator set 8, the disc 9 and the like.

In the technical scheme, the rigidity of the oscillating spring 7 and the mass of the heave plate 11 are set, so that the vertical vibration frequency of the heave plate 11 is close to the inherent heave frequency of the floating platform, a reverse resonance phenomenon is formed between the heave plate 11 and the upright post 1, and the motion energy of the upright post 1 under the action of the wave load is transferred to the heave plate 11 to move through the reverse resonance.

The non-fixed heave plate 11 is arranged, so that the heave plate 11 is separated from the upright post 1, the additional mass and viscous damping at the bottoms of the heave plate 11 and the upright post 1 are greatly increased, the vibration suppression effect of the floating offshore platform is effectively improved, and meanwhile, the floating offshore platform can resist the influence of larger sea waves and is higher in stability and safety.

As shown in fig. 2, in the present embodiment, the fixed shaft of the cylindrical linear generator set 8 is installed below the fixed partition plate 4, the moving shaft of the cylindrical linear generator set 8 is installed above the disc 9, and the oscillating spring 7 is installed between the fixed partition plate 4 and the disc 9.

The vertical column 1 and the heave plate 11 generate reverse resonance through the oscillating spring 7 to drive the disc 9 to move up and down, the movable shaft of the cylindrical linear generator set 8 at the upper part of the disc 7 cuts the fixed shaft inner magnetic induction lines of the cylindrical linear generator set 8 at the lower part of the fixed partition plate 4, and then induced current is generated to realize the collection action of wave energy, so that the heave plate structure on the floating offshore platform not only has a good vibration suppression effect, but also can realize the conversion and utilization of the wave energy.

In the technical scheme, the diameter of the disc 9 is smaller than that of the inner wall of the upright post 1, and the inner wall of the upright post 1 is provided with the track 12 which can allow the disc 9 to slide up and down so as to prevent the disc 9 from rotating along the axial direction and ensure the stable operation of the cylindrical linear generator set 8.

In the technical scheme, for the arrangement of the air pump set 13, the air inlet pipe 14 of the air pump set is communicated with the atmosphere at the top of the platform and is connected with the lower cabin through the air outlet pipe 15, if the air pressure real-time monitoring device 16 monitors the occurrence of air leakage, the air pump set 13 is started to charge and pressurize the lower cabin through the air inlet pipe 14 and the air outlet pipe 15, so that a certain water seal (water body seal) height is ensured at the bottom of the lower cabin, namely the height of an air-water interface line W of the lower cabin is kept constant, and the phenomenon that the internal structure and the device are corroded by seawater to be damaged can be avoided.

The use method and the working principle of the embodiment are as follows:

first, a plurality of columns 1 and connecting struts 2 form a floating platform, which is structurally anchored to the sea bed by mooring lines 3 to restrain the floating platform within the sea area of a certain area. In setting the stiffness of the oscillation spring 7 and the mass of the heave plate 11, the up-down vibration frequency of the heave plate 11 should be close to the natural heave frequency of the floating platform.

As shown in fig. 3, when the floating platform column 1 is under the action of wave crest, the buoyancy of the column 1 increases, the upward movement occurs, and the inertia of the heave plate 11 and the restoring force generated by the oscillation spring 7 generate a resonance behavior opposite to the structure of the column 1, during the vibration process, the energy acting on the structure of the column 1 is converted into the kinetic energy of the heave plate 11 and the elastic potential energy of the oscillation spring 7, part of the energy is dissipated through viscous damping of the bottom of the column 1 and the heave plate 11, and part of the energy drives the moving shaft of the cylindrical linear generator set 8 fixed on the disc 9 to cut the fixed-axis magnetic induction lines at the lower part of the fixed partition plate 4 through the movement of the heave plate 11, thereby generating induction current to realize the collection action of wave energy. In the process that the upright post 1 moves upwards, due to the action of gravity and the mooring rope 3, the bottom plate 5 of the upright post 1 can not expose the wave line P of the sea waves, and a certain water seal height is always kept in the lower cabin, namely the height of the air-water interface line W in the cabin is kept to be constant.

As shown in fig. 4, when the floating platform column 1 is in the wave trough action, the buoyancy of the column 1 is reduced and downward movement occurs, due to the inertia of the heave plate 11 and the restoring force generated by the oscillation spring 7, a resonance action opposite to the structure of the column 1 is generated, in the vibration process, the energy acting on the structure of the column 1 is converted into the kinetic energy of the heave plate 11 and the elastic potential energy of the oscillation spring 7, part of the energy is dissipated through viscous damping of the bottom of the column 1 and the heave plate 11, and part of the energy drives the moving shaft of the cylindrical linear generator set 8 fixed on the disc 9 to cut the fixed-axis internal magnetic induction lines at the lower part of the fixed partition plate 4 through the movement of the heave plate 11, so as to generate induced current to realize the collection action of wave energy. In the process of downward movement of the upright post 1, a certain water seal height is always kept in the cabin due to the existence of air pressure in the cabin at the lower part, namely the height of an air-water interface line W in the cabin is kept to be certain.

It should be noted that, in this document, 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 may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.