JP3242175U - buoyancy energy storage system - Google Patents

Abstract

The object of the present invention is to ensure the connection between the float ball and the cable and the stability of the buoyancy energy storage system, and improve the service life of the buoyancy energy storage system. A first rotating mechanism is fixed to a marine base (8) and a second rotating mechanism is fixed to a coastal base (9), and when energy is stored, a first driving mechanism rotates the second rotating mechanism. By driving the motion, the cable 3 is operated and the float ball 4 descends to the seabed to complete the energy storage process, and when the energy is released, the float ball automatically rises by buoyancy and lifts the cable. When the cable 3 reversely rotates the second rotation mechanism, the rotation shaft of the power generation mechanism is rotated to generate electricity. The cable is wound around the first rotating mechanism and the second rotating mechanism to prevent swaying, and the movement trajectory of the cable, that is, the movement trajectory of the float ball is fixed, and the float ball rides on the waves. Effectively prevent shaking. [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to the technical field of power energy storage, and more particularly to a buoyancy energy storage system.

The sea has a large space, and storing energy using the buoyancy of seawater is a promising form of energy storage. In the conventional buoyancy energy storage system, the capstan is fixed on the coastal base of the ocean, the fixed pulley is fixed on the bottom of the water, one end of the cable is wound around the fixed pulley as a free end and connected to the flexible float ball, and the cable is The other end of the cable is wound around the capstan, and the cable moves one-dimensionally under the control of the fixed pulley. In order to realize large-scale application of buoyancy energy storage, the volume of the float ball is often large, and the float ball can be connected to the free end of the cable to sway on the waves, thereby Shake the cable, affecting the stability of the connection between the float ball and the cable and the stability of the buoyancy energy storage system.

Therefore, the technical problem to be solved by the present invention is to overcome the drawback that the float ball of the buoyancy energy storage system in the prior art is easy to shake, affecting the connection stability with the cable and the stability of the buoyancy energy storage system. to do.

For this reason, the present invention
a first pivoting mechanism adapted to be secured to a sea station;
a second pivoting mechanism adapted to be secured to a marine shore station and connected to a power generating mechanism;
a cable wound in a closed loop around the first rotating mechanism and the second rotating mechanism;
a floating ball fixedly connected to the cable;
a first drive mechanism affixed to a shore station and suitable for being connected to said second pivoting mechanism and used to drive the pivoting of said second pivoting mechanism. Provide a storage system.

Optionally, in said buoyant energy storage system said cable is a steel cable.

Optionally, in said buoyant energy storage system, said material of said float ball is a rigid material.

Optionally, said buoyant energy storage system further comprises a connecting member, on one side of which said float ball is fixedly connected and on the other side of which said cable is removably fixedly connected.

Optionally, in said buoyancy energy storage system said connecting member is a rope clip and/or one side of said connecting member is welded to said float ball.

Optionally, in said buoyant energy storage system said float ball is ball-shaped, cylindrical or egg-shaped and/or an outer wall of said float ball is provided with an anti-corrosion coating.

Optionally, in said buoyant energy storage system, said first pivoting mechanism comprises a first pedestal and a first pulley rotatably mounted on said first pedestal; The movement mechanism includes a second pedestal and a second pulley rotatably installed on the second pedestal, and the cable is wound around the first pulley and the second pulley.

Optionally, in said buoyancy energy storage system, said power generation mechanism and said first drive mechanism are integrally installed, a reversible motor having a drive shaft connected to a pivot shaft of said second pulley. is.

Optionally, said buoyancy energy storage system further comprises a variable speed transmission mechanism having both ends respectively connected to the pivot shaft of said second pulley and the drive shaft of said reversible motor.

Optionally, in said buoyancy energy storage system, said transmission transmission mechanism comprises a first transmission wheel coaxially connected to a pivot shaft of said second pulley and a second transmission wheel coaxially connected to a drive shaft of said reversible motor. 2 transmission wheels and a transmission belt wound around the first transmission wheel and the second transmission wheel.

The technical solution of the present invention has the following advantages.

1. The buoyant energy storage system according to the present invention, when operating, the first pivoting mechanism is fixed to the sea base, the second pivoting mechanism is fixed to the coastal base, and when storing energy, the first driving mechanism is fixed to By driving the rotation of the second rotation mechanism, the cable is operated, and the cable causes the float ball to descend to the seabed to complete the energy storage process, and the float ball becomes buoyant when the energy is released. automatically floats, the floated float ball reversely operates the cable, and the cable reversely rotates the second rotating mechanism, thereby rotating the rotating shaft of the power generation mechanism to generate power. The cable is wound around the first pivoting mechanism and the second pivoting mechanism to prevent swaying, and the movement trajectory of the cable, that is, the movement trajectory of the float ball is fixed, and the float ball is free in the water. Strictly limit the speed, effectively prevent the float ball from swaying on the waves, ensure the connection between the float ball and the cable and the stability of the buoyancy energy storage system, and extend the service life of the buoyancy energy storage system improve.

2. The material of the float ball is a rigid material, and at different water depths, the volume and buoyancy of the float ball do not change, ensuring the stable power generation of the buoyancy energy storage system. In addition, the float ball made of a rigid material prevents the float ball from bursting due to adherence of microorganisms, thereby extending the service life of the float ball.

3. The buoyancy energy storage system adopts a modular design, that is, installing multiple sets of buoyancy energy storage systems and operating different numbers of sets of buoyancy energy storage systems to achieve different power generation and power generation time can do.

In order to describe the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly describes the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. , The accompanying drawings in the following description are part of the embodiments of the present invention, and it is obvious to those skilled in the art that other drawings can be obtained based on them without creative activities. Will.

1 is a schematic diagram of a buoyancy energy storage system according to Embodiment 1 of the present invention; FIG.

The following clearly and completely describes the technical solutions of the present invention in conjunction with the drawings, but it is obvious that the above embodiments are only a part of the embodiments of the present invention, but not all of them. For those skilled in the art, other embodiments obtained without creative activities based on the embodiments of the present invention shall all fall within the protection scope of the present invention.

In the description of the present invention, orientations and positional relationships indicated by the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on what is shown in the drawings and are merely intended to facilitate or simplify the description of the invention, as the devices and elements referred to have particular orientations and are configured in particular orientations. or should not be construed as limiting the invention. Further, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

In the description of the invention, unless expressly specified or restricted, the terms "attached", "connected", "connected" may be, for example, a fixed connection, a detachable connection, or an integral connection. It may be a physical connection, a mechanical connection, or an electrical connection, and it may be in direct contact or indirectly through an intermediate. Note that it is broadly understood to mean that it may be either internal to the two elements or contiguous. A person skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

It should be noted that the technical features according to different embodiments of the present invention described below can be combined with each other as long as they do not contradict each other.

Example 1
This embodiment provides a buoyant energy storage system comprising a first pivoting mechanism, a second pivoting mechanism, a cable 3, a float ball 4, and a first drive mechanism, as shown in FIG. The first pivoting mechanism is suitable for being fixed to a marine station 8, the second pivoting mechanism is suitable for being fixed to a marine shore station 9 and is connected to a power generator, cable 3 is wound around the first rotating mechanism and the second rotating mechanism in a closed loop, the float ball 4 is fixedly connected to the cable 3, and the first drive mechanism is fixed to the shore station 9. , suitable for being connected to the second pivoting mechanism and used to drive the pivoting of the second pivoting mechanism.

The buoyant energy storage system of this structure, when operating, the first pivoting mechanism is fixed to the sea base 8, the second pivoting mechanism is fixed to the coastal base 9, and when storing energy, the first drive mechanism drives the rotation of the second rotation mechanism to operate the cable 3, causing the cable 3 to cause the float ball 4 to descend to the seabed to complete the energy storage process and release the energy; The float ball 4 automatically floats by buoyancy, the floated float ball 4 reversely operates the cable 3, and the cable 3 reversely rotates the second rotating mechanism, thereby rotating the rotating shaft of the power generation mechanism. to generate electricity. In order to prevent shaking, the cable 3 is wound around the first rotating mechanism and the second rotating mechanism. severely restricting the degree of freedom in the water, effectively preventing the float ball 4 from swaying on the waves, ensuring the stability of the connection between the float ball 4 and the cable 3 and the buoyancy energy storage system; Improve the service life of the buoyancy energy storage system.

Optionally, the cable 3 is a high-strength steel cable, which can ensure the stability of the operation of the cable 3 and prevent the float ball 4 from swinging.

The float ball 4 in the conventional buoyancy energy storage system is made of a flexible material, and the volume of the flexible float ball 4 changes according to the change in water depth, resulting in large changes in buoyancy and unstable power generation. In addition, when marine microorganisms adhere to the surface of the flexible float ball 4 and clot, the float ball 4 loses its elasticity and is easily burst, affecting the service life of the buoyancy energy storage system. Preferably, the material of the float ball 4 of the present invention is a rigid material, and the volume and buoyancy of the float ball 4 do not change at different water depths, ensuring stable power generation of the buoyancy energy storage system. In addition, the float ball 4 made of a rigid material prevents the float ball 4 from bursting due to adherence of microorganisms, thereby extending the service life of the float ball 4 . By filling the inside of the float ball 4 with nitrogen gas and maintaining the inside of the float ball 4 in a positive pressure state, deformation of the float ball 4 can be prevented and the thickness of the float ball 4 can be increased. Thus, deformation due to pressure can be prevented.

As shown in Figure 1, the buoyant energy storage system further comprises a connecting member 5 to which the float ball 4 is fixedly connected on one side and to which the cable 3 is removably fixedly connected on the other side; This makes it easy to replace the float ball 4 with a different volume, or to replace the float ball 4 by removing the connection member 5 from the cable 3 when the float ball 4 is damaged.

Optionally, the connecting member 5 is a rope clip that can be conveniently and quickly secured to or removed from the steel cable. In addition, the rope clip can achieve a reliable grip on steel cables of different diameters, so it is adaptable and can effectively improve the service life of the buoyancy energy storage system without breaking the steel cables. . The rope clip is easy to connect with the steel cable and facilitates fixing two or more float balls 4 to the steel cable according to the power generation demand.

Preferably, one side of the rope clip is welded to the float ball 4 to ensure the stability of the connection with the float ball 4 and prevent the float ball 4 from swinging.

Optionally, the float ball 4 is ball-shaped and, for the same volume, a sphere experiences less resistance than a cube and a cuboid.

Preferably, the outer wall of the float ball 4 is coated with an anti-corrosion coating to prevent the float ball 4 from being stuck in seawater for a long time and being corroded by seawater or microorganisms, thereby improving the service life of the float ball 4. Let

As shown in FIG. 1, the first rotating mechanism includes a first pedestal 11 and a first pulley 12 rotatably installed on the first pedestal 11, and the second rotating mechanism includes: It includes a second seat 21 and a second pulley 22 rotatably installed on the second seat 21, and the cable 3 is wound around the first pulley 12 and the second pulley 22, The grooves of the pulley 12 and the second pulley 22 guide the steel cable so that it circulates along a predetermined track and prevent derailment of the steel cable. The first pedestal 11 is fixed to the marine base 8, and the first rotation mechanism further includes a first support shaft fixedly installed on the first pedestal 11, supported by the first pulley 12. It is rotatably installed on the shaft. The second pedestal 21 is fixedly installed on the coast base 9, and the rotation shaft of the second pulley 22 is rotatably installed on the second pedestal 21. As shown in FIG. For example, bearings are installed on opposite sides of the second pedestal 21, and both ends of the rotating shaft are supported by the bearings on both sides.

Optionally, the generator mechanism and the first drive mechanism are a reversible motor 6 that is integrally installed and whose drive shaft is connected to the pivot shaft of the second pulley 22 . When storing energy, the reversible motor 6 is used as an electric motor to rotate the pivot shaft and the second pulley 22 , thereby lowering the steel cable and the float ball 4 . When releasing energy, the reversible motor 6 is used as a generator, and the float ball 4 rises to rotate the rotating shaft, thereby rotating the driving shaft of the generator to generate electricity.

The buoyancy energy storage system further includes a speed change transmission mechanism whose ends are respectively connected to the pivot shaft of the second pulley 22 and the drive shaft of the reversible motor 6 . When storing energy, the transmission mechanism is used to reduce the rotation speed of the second pulley 22 to ensure the stable operation of the steel cable and the float ball 4 . When releasing energy, the speed change transmission mechanism amplifies the rotation speed of the second pulley 22 and transfers it to the reversible motor 6 to ensure power generation. The generated power of the buoyancy energy storage system is proportional to the volume of the float ball 4 and the movement speed of the float ball 4, and the generated power can be adjusted by changing the volume of the float ball 4 or the movement speed of the float ball 4. The operating speed can be adjusted by the rotation speed of the reversible motor 6 or the speed change transmission mechanism.

The speed change transmission mechanism includes a first transmission wheel 71 coaxially connected to the rotation shaft of the second pulley 22, a second transmission wheel 72 coaxially connected to the drive shaft of the reversible motor 6, and a first transmission wheel 72. and a transmission belt 73 wrapped around a wheel 71 and a second transmission wheel 72 . The first transmission wheel 71 is coaxially connected to the pivot shaft of the second pulley 22 to ensure that they rotate synchronously. The second transmission wheel 72 is coaxially connected to the drive shaft of the reversible motor 6 to ensure that they rotate synchronously. By adjusting the height, the speed of the float ball 4 can be conveniently changed so that the energy storage system can meet different power generation demands. When storing energy, the second transmission wheel 72 is the driving wheel and the first transmission wheel 71 is the driven wheel; when releasing energy, the first transmission wheel 71 is the driving wheel and the second transmission. Wheel 72 is the driven wheel. For example, the first transmission wheel 71 and the second transmission wheel 72 are both belt pulleys and the transmission belt 73 is a belt. The diameter of the first belt pulley is larger than that of the second belt pulley, and the reversible motor 6 is fixed to the shore station 9 on the side of the second pedestal 21 via a pedestal.

As shown in FIG. 1, the steel cable can be installed obliquely, at this time, the first pivoting mechanism and the second pivoting mechanism are installed with a certain distance in the horizontal direction. The steel cable may be installed vertically, i.e. the first pivoting mechanism is installed vertically at the bottom of the second pivoting mechanism, and the installation of the first pivoting mechanism and the second pivoting mechanism is , can be adjusted according to the specific conditions of the shore under the shore station 9 .

Optionally, the volume of the float ball 4 is between 400m ³ and 2000m ³ and the moving speed of the float ball 4 along the direction of gravity is controlled between 0.05m/s and 0.25m/s.

The buoyancy energy storage system adopts a modular design, that is, installing multiple sets of buoyancy energy storage systems, and operating different numbers of sets of buoyancy energy storage systems to achieve different power generation and power generation time. be able to. For example, if a set energy storage unit is 10MW×1h, 10 sets of this buoyancy energy storage system are installed, and the 10 sets of energy storage systems are turned on at the same time, the maximum on-board power demand of 100MW×1h can be met. If 10 sets of energy storage systems are turned on in sequence, the maximum energy storage time of 10MW×10h can meet the critical working conditions. By turning on different numbers of buoyancy energy storage systems, different on-board power and energy storage time configurations can be achieved, realizing seamless switching between the two extreme working conditions of maximum on-board power and longest energy storage time can do. The buoyancy energy storage system can adjust the operating speed of the float ball 4 by adjusting the frequency of the reversible motor 6 to realize overclocking of the energy storage amount and energy storage time of the system.

As a first variant of embodiment 1, the first transmission wheel 71 and the second transmission wheel 72 may be sprockets and correspondingly the transmission belt 73 is a chain.

As a further modification, the speed change transmission mechanism may be a gear transmission mechanism, and the two gears are fixed to the rotation shaft of the second pulley 22 and the drive shaft of the reversible motor 6, respectively.

As a second modification of the first embodiment, the power generation mechanism and the first drive mechanism may be installed separately, the power generation mechanism being the power generator, the first drive mechanism being the electric motor, and the second drive mechanism being the electric motor. The rotation shafts of the second pulley 22 are connected to the rotation shafts of the generator and the electric motor, respectively, and clutches are installed between the rotation shafts of the generator and the electric motor and the rotation shaft of the second pulley 22. When energy is stored, the connection between the rotating shaft of the generator and the rotating shaft of the second pulley 22 is disconnected, and when releasing the energy, the rotating shaft of the electric motor and the rotating shaft of the second pulley 22 are disconnected. The connection with the drive shaft is cut off.

As a third modification of the first embodiment, the float ball 4 may have any shape such as a cylindrical shape, an oval shape, or a rectangular parallelepiped shape.

As a fourth modified example of the first embodiment, the connecting member 5 may be a band fixed to the float ball 4 on one side and locked around the steel cable on the other side. As a variant, the float ball 4 may be directly welded to the steel cable.

It is clear that the above examples are merely examples for the purpose of clarifying rather than limiting the embodiments. A person skilled in the art can make various modifications or changes based on the above description. It is neither necessary nor possible to cover all embodiments here. Obvious variations or modifications introduced therefrom are still covered by the protection scope of the invention.

11. First pedestal 12 . first pulley 21 . Second pedestal 22 . 2nd pulley; Cable 4 . Float ball 5 . connection member 6 . Reversible motor 71 . first transmission wheel 72 . Second transfer wheel 73 . transmission belt 8 . Marine base 9 . coastal base

Claims (10)

a first pivoting mechanism adapted to be secured to a sea station (8);
a second pivoting mechanism affixed to a marine shore station (9) and adapted to be connected to a power generating mechanism;
a cable (3) wound in a closed loop around the first rotating mechanism and the second rotating mechanism;
a float ball (4) fixedly connected to said cable (3);
a first drive mechanism affixed to a shore station (9) and suitable for being connected to said second pivoting mechanism and used to drive the pivoting of said second pivoting mechanism. A buoyant energy storage system, characterized by: Buoyancy energy storage system according to claim 1, characterized in that said cable (3) is a steel cable. Buoyant energy storage system according to claim 1 or 2, characterized in that the material of the float ball (4) is a rigid material. Further comprising a connecting member (5) to which the float ball (4) is fixedly connected on one side and to which the cable (3) is detachably fixedly connected on the other side. Item 4. The buoyancy energy storage system according to item 3. 5. Buoyancy energy storage system according to claim 4, characterized in that said connecting member (5) is a rope clip and/or one side of said connecting member (5) is welded to said float ball (4). . 4. A buoyant energy storage system according to claim 3, characterized in that the float ball (4) is ball-shaped, cylindrical or egg-shaped and/or has an anti-corrosion coating on its outer wall. The first rotating mechanism includes a first pedestal (11) and a first pulley (12) rotatably installed on the first pedestal (11), and the second rotating mechanism comprises a second pedestal (21) and a second pulley (22) rotatably mounted on said second pedestal (21), said cable (3) being connected to said first pulley (12 ) and the second pulley (22). The power generation mechanism and the first drive mechanism are integrally installed, and the drive shaft is a reversible motor (6) connected to the rotation shaft of the second pulley (22). 8. The buoyant energy storage system of claim 7. 9. The buoyancy energy storage according to claim 8, further comprising a speed change transmission mechanism whose ends are respectively connected to the rotation shaft of the second pulley (22) and the drive shaft of the reversible motor (6). system. The speed change transmission mechanism includes a first transmission wheel (71) coaxially connected to the rotation shaft of the second pulley (22) and a second transmission wheel (71) coaxially connected to the drive shaft of the reversible motor (6). 10. The device according to claim 9, comprising a transmission wheel (72) and a transmission belt (73) wrapped around said first transmission wheel (71) and said second transmission wheel (72). buoyant energy storage system.

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