A near-shore single-pile fixed type wind-wave combined power generation device

Abstract

The application discloses a kind of offshore single pile leg fixed wind wave combined power generation device, it is related to power generation device technical field;Including the coupling base of fixed sleeve in wind turbine tower, a plurality of swing arm type wave power generation devices are annularly arranged on the coupling base, the swing arm type wave power generation device includes hydraulic power generation system, the swing arm type wave power generation device can convert wave energy into hydraulic energy, the hydraulic power generation system can convert hydraulic energy into mechanical energy to drive generator rotation, to realize the conversion of wave energy to electric energy.The present application can realize the power transmission and distribution system of sharing existing fan, reduce its power generation cost, also can improve the annual power generation efficiency of power generation, and enhance the survival ability of wind farm under extreme climate.

Description

Technical Field

[0001] This invention relates to the field of power generation equipment technology, and in particular to a wind and wave combined power generation device suitable for offshore single-pile fixed-leg type. Background Technology

[0002] my country possesses abundant marine energy resources. These resources encompass various forms, including wave energy, tidal energy, thermal gradient energy, salinity gradient energy, and tidal energy, with wave energy being the most abundant usable marine energy source in my country. However, when offshore wind and wave energy are utilized independently, power generation equipment suffers from drawbacks such as low energy utilization efficiency, small generating capacity, unstable supply, and high generation costs. Currently, most completed offshore wind farms are located in the intertidal zone and nearshore areas, and resource development is gradually reaching saturation. Therefore, how to further improve energy output based on existing resources is a growing concern in the industry. Summary of the Invention

[0003] The purpose of this invention is to provide a nearshore single-leg fixed wind and wave combined power generation device to solve the problems existing in the prior art. It can share the power transmission and distribution system of the existing wind turbine, reduce its power generation cost, improve the annual power generation efficiency, and enhance the survivability of the wind farm under extreme climate conditions.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a nearshore single-leg fixed wind and wave combined power generation device, including a coupling base fixedly mounted on a wind turbine tower. Multiple swing-arm wave energy generation devices are arranged around the coupling base. Each swing-arm wave energy generation device includes a hydraulic power generation system. The swing-arm wave energy generation device can convert wave energy into hydraulic energy, and the hydraulic power generation system can convert hydraulic energy into mechanical energy that drives the generator to rotate, thereby realizing the conversion of wave energy into electrical energy.

[0006] Optionally, the swing-arm wave energy generation device includes a swing-arm assembly, one end of which is hinged to a float and the other end to a connecting base, the connecting base being fixedly connected to the coupling base; a hydraulic cylinder is provided on the swing-arm assembly, the end of the hydraulic rod of the hydraulic cylinder being hinged to the connecting base; the hydraulic ports at both ends of the hydraulic cylinder are respectively connected to the hydraulic power generation system.

[0007] Optionally, the swing arm assembly includes a swing arm triangular frame, which includes an upper arm and two lower arms fixed by welding with reinforcing ribs. The first ends of the upper and lower arms of the swing arm triangular frame are respectively hinged to the float. The end of the upper arm of the swing arm triangular frame is provided with a first hinge point that is hinged to the hydraulic cylinder. The end of the hydraulic rod is hinged to the top of the connecting base through a second hinge point. The ends of the two lower arms are respectively hinged to the bottom of the connecting base through a third hinge point.

[0008] Optionally, the upper part of the float is a disc-shaped structure and the lower part is a conical structure; a connecting column is fixedly provided at the center of the top of the float, and the connecting column is hinged to one end of the swing arm assembly; the inside of the float is a hollow structure to facilitate adjustment of the draft, and the lower arm of the swing arm triangular frame is kept horizontal with the float.

[0009] Optionally, the top and bottom of the connecting base away from the swing arm assembly are symmetrically provided with U-shaped grooves. The U-shaped grooves can be engaged with the coupling base and then fixed by bolts to ensure the strength of the connection.

[0010] Optionally, the second hinge point includes a rotary bearing disposed at the end of the hydraulic rod, the rotary bearing being movably sleeved on a rotary shaft above the connecting base to ensure the rotational freedom of the end of the hydraulic rod.

[0011] Optionally, the hydraulic power generation system includes a hydraulic bridge circuit, which includes a first flow branch, a second flow branch, a third flow branch, and a fourth flow branch. The hydraulic oil port at one end of the hydraulic cylinder is connected to one end of the first and second flow branches via pipelines, and the hydraulic oil port at the other end of the hydraulic cylinder is connected to one end of the third and fourth flow branches via pipelines. The other ends of the first and third flow branches are sequentially connected to an overflow valve and a throttle valve via a first pipeline equipped with an accumulator. The throttle valve is connected to a hydraulic motor via a coupling, and the hydraulic motor is connected to a generator. The other ends of the second and fourth flow branches are connected to a filter via a second pipeline equipped with an accumulator. The filter is connected to the end of the hydraulic motor furthest from the coupling. The second pipeline between the filter and the hydraulic motor is connected to an oil tank. One-way valves are respectively installed on the first, second, third, and fourth flow branches.

[0012] The present invention achieves the following technical effects compared to the prior art:

[0013] This invention is applicable to nearshore single-leg fixed wind and wave combined power generation devices, which share mooring, power and other infrastructure with the wave power generation device and the wind turbine, thereby reducing costs; the swing-arm wave power generation device is arranged in the sea area where the wind turbine is located, which can effectively absorb wave energy and reduce the wave load on the wind turbine. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a swing-arm wave energy generation device;

[0016] Figure 2 This is a side view of the structure of a swing-arm wave energy generation device;

[0017] Figure 3 This is a top view of a structure suitable for a nearshore single-pile fixed wind and wave combined power generation device;

[0018] Figure 4 This is a schematic diagram of the coupling between a near-shore single-pile fixed wind and wave combined power generation device and a wind turbine tower;

[0019] Figure 5 This is a schematic diagram of the working principle of a hydraulic power generation system suitable for offshore single-pile fixed wind and wave combined power generation devices;

[0020] In the diagram: 1-Float, 2-Reinforcing rib, 3-Swing arm triangular frame, 4-First hinge point, 5-Hydraulic cylinder, 6-Hydraulic rod, 7-Second hinge point, 8-Rotating shaft, 9-Coupling base, 10-U-groove, 11-Third hinge point, 12-Connecting base, 13-Wind turbine, 14-Oil tank, 15-Hydraulic motor, 16-Generator, 17-Coupling, 18-Throttle valve, 19-Relief valve, 20-Accumulator, 21-Hydraulic bridge circuit, 22-Filter. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The purpose of this invention is to provide a nearshore single-leg fixed wind and wave combined power generation device to solve the problems existing in the prior art. It can share the power transmission and distribution system of the existing wind turbine, reduce its power generation cost, improve the annual power generation efficiency, and enhance the survivability of the wind farm under extreme climate conditions.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] This invention provides a nearshore single-leg fixed wind and wave combined power generation device, including a coupling base fixedly mounted on a wind turbine tower, and multiple swing-arm wave power generation devices are arranged around the coupling base. Each swing-arm wave power generation device includes a float, a swing arm assembly, a hydraulic power generation system, a connecting base, and auxiliary connecting parts.

[0025] Specifically, such as Figure 1 and Figure 2 As shown, the float 1 is fixedly hinged to the end of the swing arm triangular frame 3. The swing arm triangular frame 3 is fixed by welding two layers of reinforcing ribs 2 to ensure the structural strength of the swing arm. The upper arm end of the swing arm triangular frame 3 is the first hinge point 4, which connects the upper arm of the swing arm triangular frame 3 to the hydraulic cylinder 5. The ends of the two lower arms of the swing arm triangular frame 3 are the third hinge points 11, which realize the rotational hinge between the connecting base 12 and the lower arms of the triangular frame. The hydraulic cylinder 5 and the hydraulic rod 6 are an integral structure. The end of the hydraulic rod 6 is the second hinge point 7, which is realized by the rotational bearing at the end of the hydraulic rod 6 cooperating with the rotational shaft 8 of the connecting base 12. The connecting base 12 connects the swing arm triangular frame 3 and the coupling base 9 respectively. The connecting base 12 is fixed to the coupling base 9 by the upper and lower U-shaped grooves 10. The coupling base 9 is inserted into the U-shaped groove and then the two are fixed by bolts. The coupling base 9 is connected to the wind turbine tower 13, and the wave energy generation device is installed on the wind turbine tower 13 by bolt connection.

[0026] like Figure 3 As shown, four swing-arm wave energy generation devices are arranged in a circular array on both sides of the coupling base 9, in a symmetrical distribution.

[0027] like Figure 4 As shown, the array-type swing-arm wave energy generator is connected to the wind turbine tower 13 via the coupling base 9. Under operating sea conditions, the float 1 oscillates with the waves, and the wave force acts on the float 1, causing the oil in the hydraulic cylinder 5 to compress, converting wave energy into hydraulic energy, which in turn drives the hydraulic motor 15. The hydraulic motor 15 converts the hydraulic energy into mechanical energy that drives the generator 16 to rotate, thus realizing the conversion of wave energy into electrical energy.

[0028] like Figure 5As shown, the working principle of the hydraulic power generation system is further described. When the oil in the left side of the hydraulic cylinder 5 is compressed, the volume of the left chamber decreases, and the oil is forced out of the hydraulic cylinder 5. The oil flows through the pipeline and out through the hydraulic bridge 21. After the accumulator 20 stabilizes the pressure and flow rate in the pipeline, the flow rate is controlled by the relief valve 19 and the throttle valve 18. The coupling 17 connects to the hydraulic motor 15 to transmit torque. The hydraulic motor 15 converts hydraulic energy into mechanical energy to drive the generator 16 to generate electricity. Excess oil flows back to the oil tank 14. Due to the increased volume and decreased pressure in the right chamber, the oil flows back to the right chamber of the hydraulic cylinder 5 after being filtered by the filter 22 and stabilized by the accumulator 20. When the oil in the right side of the hydraulic cylinder 5 is compressed, the volume of the right chamber decreases, causing oil to be drawn into the left chamber and forced out of the right chamber. The hydraulic fluid flows out through hydraulic bridge 21, passes through accumulator 20, then through overflow valve 19 and throttle valve 18, coupling 17, and finally the hydraulic motor 15 outputs mechanical energy to drive generator 16 to generate electricity. Due to the suction effect of the left chamber of hydraulic cylinder 5, the hydraulic fluid flows back to the left chamber through filter 22 and hydraulic bridge 21. Through the diversion effect of hydraulic bridge 21, the hydraulic motor can rotate in the forward direction regardless of whether the hydraulic rod 6 moves to the left or right, enabling the system to generate electricity stably.

[0029] In the description of this invention, it should be noted that the terms "center," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A nearshore single-leg fixed wind and wave combined power generation device, characterized in that: It includes a coupling base fixedly mounted on the wind turbine tower, and a plurality of swing-arm wave energy generation devices are ringed on the coupling base. Each swing-arm wave energy generation device includes a hydraulic power generation system. The swing-arm wave energy generation device can convert wave energy into hydraulic energy, and the hydraulic power generation system can convert hydraulic energy into mechanical energy that drives the generator to rotate, thereby realizing the conversion of wave energy into electrical energy. The swing-arm wave energy generation device includes a swing-arm assembly, one end of which is hinged to a float and the other end to a connecting base, which is fixedly connected to the coupling base; a hydraulic cylinder is provided on the swing-arm assembly, and the end of the hydraulic rod of the hydraulic cylinder is hinged to the connecting base; the hydraulic oil ports at both ends of the hydraulic cylinder are respectively connected to the hydraulic power generation system. The swing arm assembly includes a swing arm triangular frame, which includes an upper arm and two lower arms fixed by welding with reinforcing ribs. The first ends of the upper arm and the lower arms of the swing arm triangular frame are respectively hinged to the float. The upper arm of the swing arm triangular frame has a first hinge point at the end that is hinged to the hydraulic cylinder. The end of the hydraulic rod is hinged to the top of the connecting base through a second hinge point. The ends of the two lower arms are respectively hinged to the bottom of the connecting base through a third hinge point. The hydraulic power generation system includes a hydraulic bridge circuit, which comprises a first flow branch, a second flow branch, a third flow branch, and a fourth flow branch. The hydraulic oil port at one end of the hydraulic cylinder is connected to one end of the first and second flow branches via pipelines, and the hydraulic oil port at the other end of the hydraulic cylinder is connected to one end of the third and fourth flow branches via pipelines. The other ends of the first and third flow branches are connected in sequence to an overflow valve and a throttle valve via a first pipeline equipped with an accumulator. The throttle valve is connected to a hydraulic motor via a coupling, and the hydraulic motor is connected to a generator. The other ends of the second and fourth flow branches are connected to a filter via a second pipeline equipped with an accumulator. The filter is connected to the end of the hydraulic motor furthest from the coupling. The second pipeline between the filter and the hydraulic motor is connected to an oil tank. One-way valves are respectively installed on the first, second, third, and fourth flow branches.

2. The offshore single-leg fixed wind and wave combined power generation device according to claim 1, characterized in that: The upper part of the float is a disc-shaped structure, and the lower part is a conical structure; a connecting column is fixedly provided at the center of the top of the float, and the connecting column is hinged to one end of the swing arm assembly.

3. The offshore single-leg fixed wind and wave combined power generation device according to claim 1, characterized in that: The top and bottom of the connecting base away from the swing arm assembly are symmetrically provided with U-shaped grooves, which can be engaged with the coupling base.

4. The offshore single-leg fixed wind and wave combined power generation device according to claim 1, characterized in that: The second hinge point includes a rotary bearing disposed at the end of the hydraulic rod, the rotary bearing being movably sleeved on a rotary shaft above the connecting base.

Images