CN107476930A - A kind of twin float, damping riser wave energy generating set - Google Patents

Abstract

The invention discloses a wave energy power generation device with double buoys and damping vertical plates, comprising double buoys interconnected in parallel, auxiliary structures of the double buoys, damping vertical plates, connecting rods for damping plates, and fixed connection between the double buoys and the auxiliary structures of the double buoys , the double buoys and the auxiliary structures of the double buoys float on the water surface. Under the action of waves, the double buoys produce rolling motion, and the damping vertical plate is located below the water surface. The rods are connected, and the double buoys are fixed by a fixing device. Under the action of waves, the double buoys and damping vertical plate wave energy generating device of the present invention, the different parts of the double buoys and damping vertical plate wave energy generating device generate relative motion, which is used to drive the generator to generate electricity.

Description

A wave energy generating device with double buoys and damping vertical plates

technical field

The invention belongs to the field of ocean wave energy generating devices, in particular to a wave energy generating device with double buoys and damping vertical plates.

Background technique

Wave energy power generation is an important form of ocean energy power generation, including several types such as the base type fixed on the seabed, the shore type built on the coast, and the floating type floating on the sea surface. Floating wave energy generation devices are flexible in deployment, low in construction and maintenance costs, and can provide power for applications such as deserted islands, lighthouses, and seawater desalination, and have broad application prospects.

The wave energy power generation device includes wave energy absorber, PTO (Power Take Off) power generation, power conversion and other parts. When the waves pass through the floating wave energy generating device, part of the wave energy is absorbed and converted by the generating device, so that the wave height after passing through the device decreases, and it has a certain wave dissipation capability. Therefore, the function of the floating wave energy generating device is similar to that of the floating type Similar to breakwaters, wave power generation devices can be installed in combination with floating breakwaters, taking into account both wave dissipation and power generation.

Contents of the invention

The technical problem to be solved by the present invention is to provide a double pontoon, damping riser wave energy generating device, under the action of waves, different parts of the double pontoon, damping riser wave energy generating device produce relative motion, which is used to drive the generator generate electricity.

The technical solution adopted by the present invention to solve the technical problem is to provide a wave energy power generation device with double buoys and damping risers, including double buoys interconnected in parallel, auxiliary structures of double buoys, damping risers, and damping plate connecting rods, The double pontoons are fixedly connected with the auxiliary structures of the double pontoons. The double pontoons and the auxiliary structures of the double pontoons float on the water surface. Under the action of waves, the double pontoons produce rolling motion. The plates are connected by damping plate connecting rods, and the double buoys are fixed by fixing devices, such as the fixing devices of the buoyant tank structure. The damping plate connecting rod goes deep into the water and is connected with the vertical damping riser. Due to the huge resistance of the water body, the damping vertical plate is almost kept fixed, and the relative rotation and torque between the double buoys and the damping vertical plate are used to generate electricity.

According to the above technical solution, the length of the connecting rod of the damping plate is at least 1/2 of the wave wavelength. The diameter of the slender damping plate connecting rod is as small as possible on the basis of ensuring the strength of the force without breaking, and the length must ensure that the damping vertical plate goes down to the underwater wave-free area, at least 1/2 wavelength.

According to the above technical scheme, the auxiliary structures of the double buoys include an equipment cabin (the equipment cabin can be placed inside the buoyancy tank), and the equipment cabin includes a power generation cabin and two sets of symmetrically arranged transmission systems. Each set of transmission systems includes a gear box and a rack. Seat, 2 racks arranged in parallel, 2 hydraulic cylinders arranged in parallel, and the input ends of the gearboxes in the 2 sets of transmission systems are connected by a transverse shaft; 2 racks arranged in parallel, one end of which is fixed on the gear The other ends of the two parallel racks are respectively connected to the top of the piston rod of the hydraulic cylinder, the hydraulic cylinder is connected to the generator cabin, and the output end of the gearbox is connected to the gear box through the connecting shaft. The above-mentioned intermediate gear is connected, and the central point position of the transverse coupling shaft is connected with the damping vertical plate through the damping plate connecting rod.

According to the above-mentioned technical scheme, a hydraulic oil tank, a hydraulic motor, a speed-increasing box, and a generator are arranged in the power generation cabin, and the hydraulic cylinder is connected with the input end of the hydraulic oil tank inside the power generation cabin through a hydraulic pipe, and the output end of the hydraulic oil tank is connected with the output end of the hydraulic motor. The input end is connected, the output end of the hydraulic motor is connected with the input end of the speed-increasing gearbox, and the output end of the speed-increasing gearbox is connected with the generator, forming a complete hydraulic power generation system.

According to the above technical solution, the double pontoons adopt a hollow cylindrical structure, which provides sufficient rigidity while reducing weight.

According to the above technical solution, a helical blade is attached along the length direction of the damping plate connecting rod to prevent wake flow and avoid vortex-induced vibration of the damping plate connecting rod.

The beneficial effects produced by the present invention are: 1. The wave energy generating device of the present invention adopts a double buoy-damping riser structure, which is easy to design, manufacture, install and maintain, and is easy to deploy in large quantities. Under the action of waves, different parts of the double buoys and damping vertical plate wave energy generation device generate relative motion, which is used to drive the generator to generate electricity.

2. The wave energy generating device of the present invention utilizes the rolling (or pitching, depending on the setting of the coordinate system) motion generated by waves to generate electricity, and can be deployed independently or in series in groups.

3. The wave energy generating device of the present invention can be combined with a floating breakwater in the form of rolling (pitch) motion, especially a floating breakwater with a double buoy structure, as a section of the breakwater, connected in series for joint deployment.

4. The wave energy generating device of the present invention is placed in the buoyant tank in the middle of the double buoys. The entire power generation system is completely in a sealed state and does not directly contact with seawater, which avoids problems such as device damage caused by seawater corrosion or high-temperature radiation, and improves the performance of the entire device. safety and adaptability.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is a schematic structural view of a wave energy generating device according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of the equipment cabin in an embodiment of the present invention;

Fig. 3 is a schematic diagram of a rack transmission structure in an embodiment of the present invention;

Fig. 4 is a sectional view of a wave energy generating device in an embodiment of the present invention;

Fig. 5 is a schematic diagram of the damping plate connecting rod and the attached helical blade in the embodiment of the present invention;

In the figure: 1-damping vertical plate; 2-damping plate connecting rod; 3-equipment compartment; 4-transverse coupling shaft; 5-pontoon; 6-pontoon; Bar; 10-hydraulic motor; 11-hydraulic cylinder; 12-generator cabin; 13-hydraulic oil tank; 14-increasing gear box; 15-hydraulic oil pipe; 16-generator; - accumulator; 201 - screw blade.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In an embodiment of the present invention, a wave energy power generation device with double buoys and damping risers is provided, including double buoys interconnected in parallel, auxiliary structures of double buoys, damping risers, connecting rods for damping plates, double buoys and double buoys auxiliary structures The double pontoons and the auxiliary structures of the double pontoons float on the water surface, and the double pontoons produce rolling motion under the action of waves. The damping vertical plate is located below the water surface, and the auxiliary structure of the double pontoons and the damping vertical plate are connected by a damping plate. The rods are connected, and the double buoys are fixed by a fixing device. The damping plate connecting rod goes deep into the water and is connected with the vertical damping riser. Due to the huge resistance of the water body, the damping vertical plate is almost kept fixed, and the relative rotation and torque between the double buoys and the damping vertical plate are used to generate electricity.

Further, the length of the connecting rod of the damping plate is at least 1/2 of the wave wavelength. The diameter of the slender damping plate connecting rod is as small as possible on the basis of ensuring the strength of the force without breaking, and the length must ensure that the damping vertical plate goes down to the underwater wave-free area, at least 1/2 wavelength.

Further, the auxiliary structure of the double buoys includes an equipment cabin, which includes a power generation cabin, two sets of symmetrically arranged transmission systems, and each set of transmission systems includes a gear box, a rack seat, two racks arranged in parallel, and two The hydraulic cylinders arranged in parallel, the input ends of the gearboxes in the two sets of transmission systems are connected through a transverse coupling; two racks arranged in parallel, one end of which is fixed in the rack seat, and meshed through an intermediate gear, The other ends of the two parallel racks are respectively connected to the top of the piston rod of the hydraulic cylinder, the hydraulic cylinder is connected to the generator cabin, the output end of the gearbox is connected to the intermediate gear through the connecting shaft, and the center point of the transverse coupling shaft is It is connected with the damping vertical plate through the damping plate connecting rod.

Further, a hydraulic oil tank, a hydraulic motor, a speed-increasing box, and a generator are installed in the power generation cabin, and the hydraulic cylinder is connected to the input end of the hydraulic oil tank inside the power generation cabin through a hydraulic pipe, and the output end of the hydraulic oil tank is connected to the input end of the hydraulic motor. Connection, the output end of the hydraulic motor is connected with the input end of the speed-increasing gearbox, and the output end of the speed-increasing gearbox is connected with the generator, forming a complete hydraulic power generation system.

Furthermore, the double pontoons adopt a hollow cylindrical structure, which provides sufficient rigidity while reducing weight.

Further, a helical blade is attached along the length direction of the damping plate connecting rod to prevent wake flow and avoid vortex-induced vibration of the damping plate connecting rod.

In a preferred embodiment of the present invention, a floating wave energy generating device with a structure of double buoys and damping risers is provided, including double buoys interconnected in parallel, damping risers, and damping plate connecting rods. The double buoys are rigidly connected in parallel, and the diameters of the double buoys are equal, and there is a certain distance between them, and the distance is not greater than 1/4 wavelength of the design wave to generate rolling motion. The damping vertical plate is placed downwards below the water surface through the slender damping plate connecting rod, vertical to the still water surface, and within the water depth range not affected by waves. The damping vertical plate is rigidly connected with the damping plate connecting rod. Necessary auxiliary structures are also arranged outside the double buoys to accommodate transmission, power generation and other components. Relative rotation can be generated between the double buoys and their subsidiary structures and the damping riser connecting rod. The auxiliary structures are buoyancy tanks and equipment cabins, and the buoyancy tanks are fixedly connected with the double buoys to connect and fix the double buoys and provide a walking path between the double buoys. Other structural forms can also be used to connect and fix the double buoys. An equipment compartment can be placed inside the pontoon to accommodate system components such as transmission and power generation. The transmission system includes a speed-increasing gearbox, and the damping riser connecting rod is connected to the input shaft of the gearbox to drive the gearbox to rotate. It also includes hydraulic transmission and its auxiliary systems such as hydraulic cylinders, accumulators, hydraulic motors, gears, racks, rack guides, etc. The output shaft of the gearbox is equipped with a gear, and two racks are placed on both sides of the gear. One end of the rack is connected to the piston rod of the hydraulic cylinder, and the hydraulic cylinder is connected to the hydraulic motor through a hydraulic pipeline to drive the generator connected to the hydraulic motor. generate electricity.

In another preferred embodiment of the present invention, as shown in Figure 1, the structural form of the wave energy generating device proposed by the present invention mainly includes double buoys 6, pontoon 5, vertical damping plate 1, equipment cabin 3; 6. The structure of double buoys is adopted, and the middle of the two buoys is connected by the buoy box 5 to meet the rolling motion of the double buoys in the waves. A concave groove 18 is excavated at the bottom of the buoyancy tank 5, and its lower end opening is in contact with seawater, and there are two shaft holes along the wall of the central axis direction of the equipment cabin 3 so that the transverse connecting shaft 4 can pass through, wherein the transverse connecting shaft 4 is equivalent to The central axis that the anti-wave lifting body rotates when the main body performs rolling motion. The central point of the transverse connecting shaft 4 is fixedly connected with the damping plate connecting rod 2, so that the damping plate connecting rod 2 extends downward along the opening direction of the concave groove 18 and extends into deep water. The other end of the damping plate connecting rod 2 in the deep water position is fixed to the vertical damping plate 1; the plane of the damping plate is placed perpendicular to the incoming wave direction to provide a large damping force, so that the double buoys 6 and the damping plate connecting rod 2 Generate as large a relative angle as possible, capture more wave energy, and achieve better power generation effect.

The overall structure of the equipment cabin 3 referred to in the present invention is a concave design, and the groove at the lower end is matched with the concave groove 18 of the buoyancy tank, so that it can be closely attached to the wall surface of the inner boss formed by the groove and welded or fastened by a stud. Fix by means of tightening, etc., so the equipment cabin 3 can rotate with the rolling motion of the main body of the breakwater. Two shaft holes matched with the concave groove 18 are opened on both sides of the inner wall of the equipment cabin 3, so that the two ends of the transverse connecting shaft 4 pass through the concave groove 18 and the wall of the equipment cabin 3 and stretch into the equipment cabin 3. A layer of waterproof seal is respectively made on both sides of the bearing at the shaft hole where the transverse connecting shaft 4 passes, so that it can rotate freely and does not directly contact with sea water, so a sealed environment in the cabin is formed. The upper end of the pontoon 5 adopts an openable structure, which is convenient for installation and maintenance of structures in the cabin.

As shown in Figure 2 is the overall layout of the equipment compartment 3: the lower floor is equipped with a gear box 7 connected to the transverse shaft 4 and a rack seat 8 connected to the output end of the gear box 7 shaft. Among them, the gear box 7 is relatively fixed with the bulkhead and can move with its movement, and the inside of the gear box is meshed with gears to achieve the purpose of a small amount of speed-up. Usually, the speed-up of 1:5—1:10 is designed according to the stroke of the rack 9 Compare. The output shaft passes through the gear 17 to make it placed in the rack seat 8, and utilizes the gear-rack cooperation to drive the hydraulic cylinder 11 to perform work. The hydraulic oil enters the accumulator 19 through the hydraulic pipe 15 and is controlled by the accumulator control valve group to supply oil to the hydraulic motor 10 . The output end of the motor is connected to the speed-up gearbox 14, and a certain speed-up ratio is provided according to the requirements of the working conditions, and the speed-up ratio is increased as much as possible under the condition of ensuring the rigidity requirement, that is, the rotating speed of the output shaft is increased. The output end of the speed-increasing gearbox 14 is directly connected to the generator 16, which drives it to rotate after speed-up and achieves the purpose of generating electricity.

As shown in Figure 3, the two sides of the rack seat 8 are rack guide rails, and the two racks 9 can slide back and forth on the guide rails, and the gear 17 is meshed with the two racks according to the design requirements, so that the gear 17 drives The purpose of tooth bar 9 slides. The other end of the rack 9 is connected with one end of the ejector piston of the hydraulic cylinder 11 fixed on the bulkhead, and finally converts the rotary motion of the transverse coupling shaft 4 into the linear reciprocating motion of the piston. When the breakwater rotates in one direction, according to the design requirements, the output shaft of the gearbox 7 also rotates in the same direction to drive the gear 17 to rotate at the same speed, and then one of the racks on both sides moves upwards and the other moves downwards in a straight line , That is, one hydraulic cylinder realizes oil discharge and the other hydraulic cylinder realizes oil suction. When the breakwater turns in the other direction, similarly the two hydraulic cylinders complete the opposite process, that is, one sucks oil and the other discharges oil. Therefore, the working process of the hydraulic system can be realized in every rotation process of the breakwater. The way of using one gear to drive two racks not only avoids the imbalance that may be caused by the one-sided force of the gear, but also improves the utilization rate of wave energy.

Figure 4 shows the working principle of the power generation device in waves. When the buoy on one side of the breakwater is in the trough, the buoy on the other side is located near the wave crest, that is, the breakwater performs rolling motion in the wave. The vertical damping plate 1 that goes deep into the water keeps the vertical state motionless or only produces slight rotation due to the resistance of water to the plate surface, and the transverse coupling shaft 4 that links to each other with the damping plate remains static or rotates in a small range. At the same time, the equipment cabin 3 will rotate along with the main body of the breakwater, and then rotate relative to the transverse coupling shaft 4 . The output shaft of the gearbox 7 provides continuous power support for the hydraulic system.

The damping plate connecting rod 2 can adopt a hollow cylindrical structure to provide sufficient rigidity while reducing weight. A helical blade 201 can also be attached, as shown in FIG. 5 , to prevent wake flow and avoid vortex-induced vibration of the damping plate connecting rod 2 .

The electricity generated by the invention can be stored through the electricity storage device installed inside the device or connected to the submarine cable through the output terminal of the generator to be transported to the shore power station for storage and utilization.

The double pontoon-damping riser structure adopted by the present invention is easy to be connected in series horizontally, deployed in groups, and the power generation capacity can be adjusted according to needs.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present invention.

Claims (6)

1. A double pontoon, damping riser wave energy generating device is characterized in that it comprises parallel interconnected double pontoons, double pontoon subsidiary structures, damping risers, damping plate connecting rods, double pontoons and double pontoon subsidiary structures Fixed connection, the double buoys and the auxiliary structures of the double buoys float on the water surface, the double buoys produce rolling motion under the action of waves, the damping vertical plate is located below the water surface, and the connecting rod of the damping plate is connected between the auxiliary structure of the double buoys and the damping vertical plate Connection, the double buoys are fixed by a fixing device. 2. The wave energy generating device with double buoys and damping risers according to claim 1, characterized in that the length of the damping plate connecting rod is at least 1/2 of the wave wavelength. 3. according to claim 1 or 2 described double pontoons, damping riser wave energy generating device, it is characterized in that, double pontoon auxiliary structure comprises equipment cabin, and equipment cabin comprises power generation cabin, 2 groups of symmetrically arranged transmission systems, Each transmission system includes a gearbox, a rack seat, 2 parallel racks, and 2 parallel hydraulic cylinders. The input ends of the gearboxes in the 2 transmission systems are connected by a transverse shaft; the 2 parallel One end of the set rack is fixed in the rack seat and meshed through an intermediate gear. The other ends of the two parallel racks are respectively connected to the top of the piston rod of the hydraulic cylinder, and the hydraulic cylinder is connected to the generator cabin. , the output end of the gearbox is connected to the intermediate gear through a connecting shaft, and the center point of the transverse connecting shaft is connected to the damping vertical plate through a damping plate connecting rod. 4. The wave energy generating device with double buoys and damping risers according to claim 3 is characterized in that a hydraulic oil tank, a hydraulic motor, a speed-up box, and a generator are arranged in the power generation cabin, and the hydraulic cylinder connects with the power generation cabin through hydraulic pipes. The input end of the internal hydraulic oil tank is connected, the output end of the hydraulic oil tank is connected with the input end of the hydraulic motor, the output end of the hydraulic motor is connected with the input end of the speed increasing gearbox, and the output end of the speed increasing gear box is connected with the generator. 5. The wave energy generating device with double buoys and damping risers according to claim 1 or 2, characterized in that the double buoys adopt a hollow cylindrical structure. 6. The wave energy generating device with double buoys and damping risers according to claim 1 or 2, characterized in that a helical blade is attached along the length direction of the damping plate connecting rod.