Array pneumatic and hydraulic integrated box-type wave energy power generation device

Abstract

The invention discloses an array pneumatic and hydraulic integrated box type wave energy power generation device which comprises a plurality of buoyancy tanks, oscillating water column type power generation devices, ball screw type PTO power generation devices and energy storage devices are arranged in the buoyancy tanks, the oscillating water column type power generation devices are arranged in air chambers above the interiors of the buoyancy tanks, and the ball screw type PTO power generation devices are arranged in air chambers above the interiors of the buoyancy tanks. The air chamber is communicated with a cavity below the buoyancy tank through an air channel, the ball screw type PTO power generation device is arranged in a closed cavity in the side wall of the interior of the buoyancy tank, and the oscillating water column type power generation device and the ball screw type PTO power generation device transmit generated electric energy into an energy storage device through a current integrator to be stored; the oscillating water column type power generation device and the ball screw type PTO power generation device are integrated in the buoyancy tank, and wave energy is more fully utilized and converted into electric energy.

Description

Technical Field

[0001] The invention relates to the field of wave energy conversion devices, and in particular to an array pneumatic and hydraulic integrated box-type wave energy power generation device. Background Art

[0002] With the rapid development of global science and technology, human consumption of natural resources has become increasingly severe, and the problem of energy shortage has become a new challenge that mankind will face in the 21st century. The development and utilization of renewable energy is an important way to solve the above problems. The ocean occupies 70% of the earth's surface area. It is the place where life originates and contains a large amount of clean and renewable energy. As a major maritime country, my country has a coastline of 18,000 kilometers. Marine energy is abundant and has great potential in the field of marine energy development and utilization. Wave energy is a high-quality renewable energy in marine energy. It has the characteristics of wide distribution and large storage capacity. It is a renewable energy with great development prospects. Among them, wave energy power generation technology has become an important direction for many coastal countries to invest in development in recent years. In response to this demand, this application proposes a solution for converting wave energy into electrical energy for efficient and full utilization of wave energy. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to provide an array of pneumatic and hydraulic integrated box-type wave energy power generation devices, which can efficiently convert wave energy into electrical energy and store it, while improving the working environment of the device and extending the service life of the device.

[0004] Technical solution: The present invention discloses an array of pneumatic and hydraulic integrated box-type wave energy power generation devices, comprising a plurality of pontoons, wherein an oscillating water column type power generation device, a ball screw type PTO power generation device and an energy storage device are arranged inside the pontoon. The oscillating water column type power generation device is arranged in an air chamber above the inside of the pontoon, and the air chamber is connected to the cavity below the pontoon through an air passage. The ball screw type PTO power generation device is arranged in a closed chamber on the inner side wall of the pontoon. The oscillating water column type power generation device and the ball screw type PTO power generation device respectively transmit the generated electric energy into the energy storage device for storage through a current integrator.

[0005] Preferably, the oscillating water column power generation device includes an oscillating water column generator and an air turbine, the air turbine is connected to the input end of the oscillating water column generator, the fan blades of the air turbine are facing the airway at the bottom of the air chamber, and the input end of the oscillating water column generator is electrically connected to the energy storage device through a current integrator.

[0006] Preferably, the air passage connects the air chamber with the cavity below the buoyancy box, and the air passage is cylindrical.

[0007] Preferably, the ball screw type PTO power generation device includes a magnet, a ball screw, a screw nut and a PTO generator. The PTO generator is arranged at the top of the closed chamber, and the output end is electrically connected to the energy storage device through a current integrator. The input end of the PTO generator is provided with a ball screw, and a magnet is provided at the bottom of the ball screw. The magnet is located at the bottom of the closed chamber, and a screw nut that moves up and down is provided on the ball screw.

[0008] Preferably, a ball is arranged in the spiral raceway between the ball screw and the screw nut. When the ball screw rotates, the ball rolls along the spiral raceway, driving the screw nut to move along the axial direction of the ball screw. A ball returner is arranged in the screw nut to guide the ball to reset, thereby guiding the screw nut to reset.

[0009] Preferably, two enclosed chambers are provided, which are opposite to each other on both sides of the internal space of the pontoon. A slide rail is provided on the end face of the enclosed chamber facing the internal space of the pontoon. A guard iron is slidably provided on the slide rail. A floating plate is provided on the side of the guard iron facing the internal space of the pontoon, and a narrow gap is reserved between the floating plates on both sides.

[0010] Preferably, the narrow slit faces the airway, and the width of the narrow slit is adjustable.

[0011] Preferably, a sealing structure is provided between the slide rail and the sealed chamber to prevent seawater from entering the sealed chamber.

[0012] Preferably, a plurality of the pontoons are arranged in an array on the sea.

[0013] Preferably, the energy storage device is arranged at a position close to the edge of the top of the buoyancy tank, and the energy storage device uses a supercapacitor to store electrical energy.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0015] (1) The present invention integrates an oscillating water column type power generation device and a ball screw type PTO power generation device in a pontoon, making fuller use of wave energy to convert into electrical energy; at the same time, integrating multiple power generation devices can generate more electrical energy storage, and share the same energy storage device, thereby reducing production costs;

[0016] (2) The lower part of the air chamber of the conventional oscillating water column type power generation device is connected to the seawater. In extreme sea conditions, the oscillating water column type air chamber is easily damaged by waves. The present invention can absorb and transform part of the wave energy through the ball screw type PTO power generation device, and at the same time, the floating plate can block and absorb part of the waves, thereby ultimately reducing the wave energy and wave excitation force reaching the oscillating water column air chamber, reducing the damage of the waves to the gas chamber, playing a role in protecting the air chamber and the oscillating water column generator, improving the safety of the device, and extending the service life of the device;

[0017] (3) The ball screw PTO power generation system of the present invention belongs to a mechanical transmission PTO system. After capturing wave energy, it is directly converted into mechanical energy. Rolling friction is used instead of traditional sliding friction to achieve high-efficiency and high-precision transmission, thereby improving the efficiency of the device from wave to electricity conversion. At the same time, because a magnetic induction mechanical power generation device is used, direct contact between the PTO system device and seawater is avoided, the degree of corrosion of the device by seawater is reduced, and the service life of the device is increased;

[0018] (4) At present, the conventional shore-type oscillating water column power generation device requires a relatively large air chamber. The present invention reduces the process difficulty and construction cost by using dispersed small air chambers of the pontoon, and the array is relatively easy;

[0019] (5) The narrow slits formed by the floating plates in the present invention can significantly improve the power generation efficiency of the oscillating water column type power generation device. At the same time, by setting floating plates of different lengths to adjust the widths of different narrow slits, wave energy of different frequencies can be absorbed, thereby achieving the purpose of efficiently converting wave energy.

[0020] (6) The energy storage device of the present invention uses a supercapacitor, which has a higher energy storage capacity than traditional capacitors and has the characteristics of rapid charging and discharging. It can store a large amount of electrical energy and provide stable power supply when needed. At the same time, due to the instability of waves, the speed of the generator in the wave power generation device is also unstable, generating alternating current with different frequencies and amplitudes. In this way, it cannot be directly connected to the load and stored in the energy storage device. The use of a current integrator can integrate the alternating current into a stable direct current and directly connect it to the load and store it in the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front cross-sectional view of the present invention.

[0022] Figure 2 It is an enlarged view of the ball screw type PTO power generation device in the present invention.

[0023] Figure 3 It is a three-dimensional diagram of multiple pontoons arranged in an array in the present invention.

[0024] Figure 4 It is a side cross-sectional view of a plurality of pontoons arranged in an array in the present invention.

[0025] Among them: 1. Float; 2. Energy storage device; 3. Air chamber; 4. Cavity; 5. Closed chamber; 6. Narrow gap; 7. Oscillating water column generator; 8. Air turbine; 9. Current integrator; 10. Magnet; 11. Ball screw; 12. Screw nut; 13. PTO generator; 14. Ball; 15. Ball returner; 16. Slide rail; 17. Guard iron; 18. Float plate. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0027] See attached Figures 1 to 3 FIG. 1 shows an array of pneumatic and hydraulic integrated box-type wave energy power generation devices of the present invention, comprising a plurality of pontoons 1, wherein an oscillating water column type power generation device, a ball screw type PTO power generation device and an energy storage device 2 are arranged inside the pontoon 1, wherein the oscillating water column type power generation device is arranged in an air chamber 3 at the upper part of the pontoon 1, and the air chamber 3 is connected to a cavity 4 below the pontoon 1 through an air passage, and the air passage is cylindrical, and the ball screw type PTO power generation device is arranged in a closed chamber 5 on the inner side wall of the pontoon 1, and the oscillating water column type power generation device and the ball screw type PTO power generation device respectively transmit the generated electric energy into the energy storage device 2 for storage through a current integrator 9.

[0028] By integrating the oscillating water column type power generation device and the ball screw type PTO power generation device in the buoyancy tank 1, the wave energy can be more fully converted into electrical energy.

[0029] In this embodiment, the oscillating water column power generation device includes an oscillating water column generator 7 and an air turbine 8. The air turbine 8 is connected to the input end of the oscillating water column generator 7. The fan blades of the air turbine 8 are facing the airway at the bottom of the air chamber 3. The input end of the oscillating water column generator 7 is electrically connected to the energy storage device 2 through a current integrator 9. Due to the instability of the waves, the rotation speed of the oscillating water column generator 7 is also unstable, generating alternating current with different frequencies and amplitudes, so it cannot be directly connected to the load and stored in the energy storage device 2. The current integrator 9 can be used to integrate the alternating current into a stable direct current that is directly connected to the load and stored in the energy storage device 2.

[0030] In this embodiment, the ball screw type PTO power generation device includes a magnet 10, a ball screw 11, a screw nut 12 and a PTO generator 13, wherein the PTO generator 13 is arranged at the top of the closed chamber 5, and the output end is electrically connected to the energy storage device 2 through the current integrator 9. The input end of the PTO generator 13 is provided with a ball screw 11, and the bottom of the ball screw 11 is provided with a magnet 10. The magnet 10 is located at the bottom of the closed chamber 5, and a screw nut 12 that moves up and down is provided on the ball screw 11.

[0031] The working principle of the ball screw PTO generator is to use rolling friction instead of traditional sliding friction, thereby achieving high-efficiency and high-precision transmission. It belongs to the mechanical transmission PTO system. After capturing wave energy, it is directly converted into mechanical energy, which improves the conversion efficiency of the device from wave to electricity. It also adopts a magnetic induction mechanical generator, which avoids direct contact between the PTO system device and seawater, reduces the degree of corrosion of the device by seawater, and increases the service life of the device.

[0032] In this embodiment, a ball 14 is arranged in the spiral raceway between the ball screw 11 and the screw nut 12. When the ball screw 11 rotates, the ball 14 rolls along the spiral raceway, driving the screw nut 12 to move along the axial direction of the ball screw 11. A ball returner 15 is arranged in the screw nut 12 to guide the ball 14 to reset, thereby guiding the screw nut 12 to reset.

[0033] In this embodiment, two closed chambers 5 are provided, which are opposite to each other on both sides of the internal space of the pontoon 1. A slide rail 16 is provided on the end face of the closed chamber 5 facing the internal space of the pontoon. A guard iron 17 is slidably provided on the slide rail 16. A float plate 18 is provided on the side of the guard iron 17 facing the internal space of the pontoon 1. A narrow gap 6 is reserved between the float plates 18 on both sides to form an oscillating water column through waves. At the same time, the narrow gap 6 is opposite to the airway, and the width of the narrow gap 6 can be adjusted by adjusting the size of the float plate 18.

[0034] The floating plate 18 can block and absorb part of the waves, reduce the wave energy and wave exciting force reaching the air chamber 3 where the oscillating water column power generation device is located, reduce the damage of the waves to the air chamber 3, and play a role in protecting the air chamber 3 and the oscillating water column generator 7. At the same time, by adjusting the size of the floating plate 18 to adjust the width of the narrow gap 6, wave energy of different frequencies can be absorbed, thereby achieving the purpose of efficiently converting wave energy.

[0035] In this embodiment, a sealing structure is provided between the slide rail 16 and the enclosed chamber 5 to prevent seawater from entering the enclosed chamber 5, further protecting the ball screw type PTO generator from direct contact with seawater, reducing the degree of corrosion by seawater, and increasing the service life.

[0036] In this embodiment, four pontoons 1 are arranged in an array on the sea, and wave energy of different frequencies is absorbed by setting different lengths of the floating plates 18 in the pontoons 1, thereby achieving the purpose of efficiently converting wave energy.

[0037] In this embodiment, the energy storage device 2 is arranged at a position close to the edge of the top of the buoyancy tank 1. The energy storage device 2 uses a supercapacitor to store electrical energy. It has a higher energy storage capacity than traditional capacitors and has the characteristics of fast charging and discharging. It can store a large amount of electrical energy and provide stable power supply when needed.

[0038] When the present application is in operation, the array-type pontoons 1 are arranged in the sea area, and waves surge into the cavity 4 below the pontoons 1 from the bottom of the pontoons 1, first driving the float plate 18 to move up and down, and the up and down moving float plate 18 drives the guard iron 17 to move along the slide rail 16, and the magnetic coupling between the guard iron 17 and the magnet 9 causes the magnet 9 to move up and down as well, thereby driving the lead screw nut to move up and down, generating rotational mechanical energy to drive the PTO generator 13 to generate electricity, and the current is integrated into a stable DC point by the current integrator 9 and stored in the energy storage device 2.

[0039] At the same time, the floating plate 18 reciprocating up and down squeezes the gas inside the cavity 4 to flow to the air chamber 3, driving the air turbine 8 to rotate, thereby converting the kinetic energy of the high-speed air into electrical energy through the oscillating water column generator 2, and integrating the current into stable direct current through the current integrator 9 and storing it in the energy storage device 2.

[0040] The energy storage device 2 stores the electric energy transmitted by the oscillating water column type power generation device and the ball screw type PTO power generation device, thereby realizing the conversion of wave energy into electric energy.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An array pneumatic and hydraulic integrated box-type wave energy power generation device, comprising a plurality of buoyancy boxes, characterized in that: An oscillating water column type power generation device, a ball screw type PTO power generation device and an energy storage device are arranged inside the pontoon. The oscillating water column type power generation device is arranged in the air chamber above the inside of the pontoon, and the air chamber is connected to the cavity below the pontoon through an air passage. The ball screw type PTO power generation device is arranged in a closed chamber on the inner side wall of the pontoon. The oscillating water column type power generation device and the ball screw type PTO power generation device respectively transmit the generated electric energy into the energy storage device for storage through a current integrator.

2. According to claim 1, an array pneumatic and hydraulic integrated box-type wave energy power generation device is characterized in that: The oscillating water column power generation device includes an oscillating water column generator and an air turbine. The air turbine is connected to the input end of the oscillating water column generator. The fan blades of the air turbine face the air passage at the bottom of the air chamber. The input end of the oscillating water column generator is electrically connected to the energy storage device through a current integrator.

3. The array pneumatic and hydraulic integrated box-type wave energy power generation device according to claim 1 is characterized by: The air passage communicates the air chamber with the cavity below the buoyancy box, and the air passage is cylindrical.

4. The array pneumatic and hydraulic integrated box-type wave energy power generation device according to claim 1 is characterized in that: The ball screw type PTO power generation device includes a magnet, a ball screw, a screw nut and a PTO generator. The PTO generator is arranged at the top of a closed chamber, and the output end is electrically connected to the energy storage device through a current integrator. A ball screw is arranged at the input end of the PTO generator, and a magnet is arranged at the bottom of the ball screw. The magnet is located at the bottom of the closed chamber, and a screw nut that moves up and down is arranged on the ball screw.

5. The array pneumatic and hydraulic integrated box-type wave energy power generation device according to claim 4 is characterized in that: A ball is arranged in the spiral raceway between the ball screw and the screw nut. When the ball screw rotates, the ball rolls along the spiral raceway, driving the screw nut to move along the axial direction of the ball screw. A ball returner is arranged in the screw nut to guide the ball to reset, thereby guiding the screw nut to reset.

6. The array pneumatic and hydraulic integrated box-type wave energy power generation device according to claim 1 is characterized by: There are two closed chambers, which are opposite to each other on both sides of the internal space of the pontoon. A slide rail is arranged on the end surface of the closed chamber facing the internal space of the pontoon, and a guard iron is slidably arranged on the slide rail. A floating plate is arranged on the side of the guard iron facing the internal space of the pontoon, and a narrow gap is reserved between the floating plates on both sides.

7. The array pneumatic and hydraulic integrated box-type wave energy power generation device according to claim 6 is characterized by: The narrow slit faces the airway, and the width of the narrow slit is adjustable.

8. The pneumatic and hydraulic integrated array box-type wave energy power generation device according to claim 6 is characterized in that: A sealing structure is provided between the slide rail and the sealed chamber to prevent seawater from entering the sealed chamber.

9. The array pneumatic and hydraulic integrated box-type wave energy power generation device according to claim 1 is characterized by: A plurality of the pontoons are arranged in an array on the sea.

10. The array pneumatic and hydraulic integrated box-type wave energy power generation device according to claim 1, characterized in that: The energy storage device is arranged at a position close to the edge of the top of the buoyancy tank, and the energy storage device uses a super capacitor to store electrical energy.

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