An integrated flywheel energy storage and anti-roll device for an ocean floating platform

Abstract

The present invention relates to an integrated flywheel energy storage and roll reduction device for an offshore floating platform, comprising a flywheel, an inner flywheel frame, and an outer flywheel frame. The flywheel is disposed within the inner flywheel frame, perpendicular to the plane of the inner and outer flywheel frames. Two inner spring damping bearings are disposed between the flywheel and the inner flywheel frame, with the ends of the inner spring damping bearings respectively connected to the flywheel and the inner flywheel frame. The outer flywheel frame is sleeved outside the inner flywheel frame, with two outer spring damping bearings disposed between the outer and inner flywheel frames, with the ends of the outer spring damping bearings respectively connected to the outer and inner flywheel frames. The two inner spring damping bearings and the two outer spring damping bearings are symmetrically arranged around the flywheel, with the inner and outer spring damping bearings spaced 90 degrees apart. The inner and outer flywheel frames, as well as the flywheel and the inner flywheel frame, rotate relative to each other around the outer and inner spring damping bearings, generating roll reduction torques in two directions.

Description

Technical Field

[0001] The present invention belongs to the fields of marine engineering and energy storage technology, and particularly relates to an integrated flywheel energy storage and roll reduction device for an ocean floating platform. Background Art

[0002] The ocean contains abundant energy resources, including fossil fuels like oil, natural gas, and methane hydrate, as well as renewable energy sources like wave power, wind power, and tidal power. Floating platforms are offshore structures commonly used for exploring, mining, and collecting marine resources. The harsh offshore environment causes these platforms to experience significant motion responses under the combined effects of wind, wave, and current loads, significantly impacting their operations and structural safety.

[0003] A flywheel energy storage device consists of five major components: a housing, a rotor, bearings, a motor-generator, and electronic control equipment. During energy storage, the motor drives the rotor to accelerate rotation, converting electrical energy into mechanical energy for storage. During discharge, the electronic control equipment switches the motor to a generator mode, driven by the rotor to generate electricity, converting stored mechanical energy into electrical energy for release. Flywheel energy storage offers advantages such as unlimited charge and discharge cycles, high power, high efficiency, and excellent reliability, making it particularly suitable for renewable energy power generation scenarios.

[0004] Gyroscopic stabilization systems have been used to stabilize ship roll. These systems incorporate a heavy-duty flywheel. The high-speed rotating flywheel's high moment of inertia creates a significant gyroscopic effect, generating a large precession torque. Gyroscopic stabilization systems offer advantages such as compact design, minimal footprint, and excellent roll reduction, making them suitable for use on offshore floating platforms. The platform's rocking motion generates a precession torque on the rotating flywheel, pushing the flywheel and its frame toward precession relative to the platform. Simultaneously, the precession of the rotating flywheel generates a counter-rotating anti-roll torque. This anti-roll torque is transmitted to the platform through the flywheel frame and base, suppressing platform roll.

[0005] The prior art discloses a "gyro and vessel" comprising a base, a flywheel frame rotatably connected to the base, a flywheel rotatably connected to the flywheel frame, a drive motor for rotating the flywheel, a power supply, and a control unit. The power supply supplies power to the drive motor; the power supply is fixedly connected to the flywheel frame and rotates with it. The control unit is fixedly connected to the flywheel frame and rotates with it; the control unit is electrically connected to the drive motor and the power supply. The control unit is configured to control the operation of the drive motor. This gyro has the advantages of a simple structure and easy maintenance.

[0006] It has the following technical problems:

[0007] 1) This anti-roll gyro only generates anti-roll torque in the roll direction and is only suitable for ships. Unlike ships, offshore floating platforms also generate pitching torque of the same order of magnitude as the roll amplitude.

[0008] 2) The anti-roll gyro consumes a lot of energy to drive the flywheel to rotate at high speed. Summary of the Invention

[0009] In response to the technical problems existing in the prior art, the purpose of the present invention is to provide an integrated flywheel energy storage and roll reduction device for an offshore floating platform, which can suppress both roll and pitch occurring on the water surface, and provide an effective gyroscopic effect by keeping the flywheel rotor within a certain speed range.

[0010] The purpose of the present invention is achieved through the following technical solutions:

[0011] An integrated flywheel energy storage and roll stabilization device for an ocean floating platform comprises a flywheel, an inner flywheel frame and an outer flywheel frame;

[0012] The flywheel is arranged in the inner flywheel frame, and the flywheel is perpendicular to the plane where the inner flywheel frame and the outer flywheel frame are located;

[0013] Two inner spring damping bearings are provided between the flywheel and the inner flywheel frame, and the two ends of the inner spring damping bearings are respectively connected to the flywheel and the inner flywheel frame;

[0014] The outer flywheel frame is sleeved on the outer flywheel frame, and two outer spring damping bearings are arranged between the outer flywheel frame and the inner flywheel frame, and the two ends of the outer spring damping bearings are respectively connected to the outer flywheel frame and the inner flywheel frame;

[0015] The two inner spring damping bearings and the two outer spring damping bearings are symmetrically arranged with the flywheel as the center, and the inner spring damping bearings and the outer spring damping bearings are arranged at 90 degrees;

[0016] Furthermore, the inner flywheel frame and the outer flywheel frame are concentrically arranged circular ring structures.

[0017] Furthermore, the flywheel is located at the center of the inner flywheel frame.

[0018] Furthermore, the flywheel is connected to an electronic control device.

[0019] Furthermore, the flywheel includes a flywheel housing, two ends of the inner spring damping bearing are respectively connected to the flywheel housing and the inner flywheel frame, and the flywheel housing is sealed and vacuumed.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] When an offshore floating platform sways due to wind, wave, and current loads, the inner and outer flywheel frames sway with the platform, while the flywheel maintains relative vertical stability due to the significant gyroscopic effect of its high-speed rotating rotor. During this process, relative rotation occurs between the inner and outer flywheel frames, and between the flywheel and the inner flywheel frame, around the outer and inner spring damping bearings, respectively. Coil springs and damping devices in the outer and inner spring damping bearings inhibit relative rotation, thereby generating anti-roll torque in both horizontal directions. This anti-roll torque is transmitted through the inner and outer flywheel frames to the offshore floating platform, suppressing its roll and pitch. Because the flywheel is perpendicular to the plane of the inner and outer flywheel frames and the flywheel shaft is mounted vertically, no anti-roll torque is generated around the vertical axis, eliminating the need to adjust the flywheel rotor speed. Maintaining the flywheel rotor within a certain speed range provides an effective gyroscopic effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention.

[0023] Figure 2 Schematic diagram of the internal structure of a flywheel according to an embodiment of the present invention.

[0024] In the picture:

[0025] 1-rotating shaft, 2-rotor, 3-motor / generator, 4-magnetic bearing, 5-bearing, 6-flywheel housing, 7-electronic control device, 8-flywheel, 9-outer flywheel frame, 10-inner flywheel frame, 11-outer spring-damper bearing, 12-inner spring-damper bearing. DETAILED DESCRIPTION

[0026] The present invention is described in further detail below.

[0027] like Figure 1 As shown, an integrated flywheel energy storage and anti-roll device for an ocean floating platform includes a flywheel 8, an inner flywheel frame 10 and an outer flywheel frame 9;

[0028] The flywheel 8 is disposed in the inner flywheel frame 10, and the flywheel 8 is perpendicular to the plane where the inner flywheel frame 10 and the outer flywheel frame 9 are located;

[0029] Two inner spring damping bearings 12 are provided between the flywheel 8 and the inner flywheel frame 10, and the two ends of the inner spring damping bearings 12 are connected to the flywheel 8 and the inner flywheel frame 10 respectively;

[0030] The outer flywheel frame 9 is sleeved on the outer side of the inner flywheel frame 10. Two outer spring damping bearings 11 are provided between the outer flywheel frame 9 and the inner flywheel frame 10. The two ends of the outer spring damping bearings 11 are respectively connected to the outer flywheel frame 9 and the inner flywheel frame 10.

[0031] The two inner spring damping bearings 12 and the two outer spring damping bearings 11 are symmetrically arranged with the flywheel 8 as the center, and the inner spring damping bearings 12 and the outer spring damping bearings 11 are arranged at 90 degrees.

[0032] Specifically, if Figure 2 As shown, the flywheel 8 includes a flywheel housing 6, and both ends of the inner spring damping bearing 12 are respectively connected to the flywheel housing 6 and the inner flywheel frame 10. The flywheel housing 6 is connected to the electronic control device 7.

[0033] The rotating shaft 1, rotor 2, motor / generator 3, magnetic bearing 4, and bearing 5 are all enclosed within the flywheel housing 6. The magnetic bearing 4 supports the weight of the rotating components, keeping the rotating shaft 1 and rotor 2 essentially suspended, reducing friction losses. The bearing 5 provides fixed position limits for the rotating shaft 1 and rotor 2 during rotation and precession. The flywheel housing 6 is sealed and evacuated to reduce friction losses. During energy storage, the various power generation devices on the offshore floating platform transmit electrical energy to the motor / generator 3 via the electronic control device 7. The motor / generator 3 drives the rotor 2 to rotate, increasing its speed and converting the electrical energy into the rotational kinetic energy of the rotor 2 for storage. During discharge, the rotor 2 drives the motor / generator 3 to convert the kinetic energy into electrical energy and transmit it to the electronic control device 7. The electronic control device 7 converts the output electrical energy (through frequency modulation, rectification, constant voltage, etc.) to an output that meets grid connection requirements, thus performing a peak-shaving function and improving the stability of power output.

[0034] When an offshore floating platform sways due to wind, wave, and current loads, the inner and outer flywheel frames 10 and 9 sway with the platform, while the flywheel 8 maintains relative vertical stability due to the significant gyroscopic effect of its high-speed rotating rotor 2. At this time, relative rotation occurs between the inner and outer flywheel frames 10 and between the flywheel 8 and the inner flywheel frame 10, respectively, around the outer spring damping bearing 11 and inner spring damping bearing 12. Coil springs and damping devices in the outer and inner spring damping bearings 11 and 12 inhibit relative rotation, thereby generating anti-roll torque in both horizontal directions. This anti-roll torque is transmitted through the inner and outer flywheel frames to the offshore floating platform, suppressing its roll and pitch. Because the flywheel 8 is perpendicular to the plane of the inner and outer flywheel frames 10 and 9, and its rotating shaft 1 is mounted vertically, it does not provide anti-roll torque that twists around the vertical axis, thus eliminating the need to adjust the speed of the flywheel 8 rotor 2. The effective gyroscopic effect can be provided by keeping the flywheel 8 and the rotor 2 within a certain rotational speed range.

[0035] In the present invention, the flywheel 8 and the rotor 2 have no specific speed increase or decrease requirements, so they can be compatible with the motor / generator 3 to realize energy storage / power generation functions, becoming an integrated energy storage and anti-roll device.

[0036] Furthermore, the flywheel 8, the outer flywheel frame 9 and the flywheel frame 10 are arranged concentrically. With this structure, the entire device is an axisymmetric structure, the structure is balanced and the force is reasonable, and the anti-roll effect can be guaranteed.

[0037] In the present invention, the flywheel 8 is installed on the marine floating platform through a two-layer inner flywheel frame 10 and an outer flywheel frame 9. The gyroscopic effect of the flywheel 8 is used to generate relative precession between the flywheel 8 and the inner flywheel frame 10 and between the inner flywheel frame 10 and the outer flywheel frame 9 when the marine floating platform swings, and then a roll-reducing torque is generated by two groups of vertically arranged spring damping bearings, which can suppress the roll and pitch occurring in two directions on the water surface.

[0038] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. An integrated flywheel energy storage and anti-roll device for an offshore floating platform, characterized by: including a flywheel, an inner flywheel frame and an outer flywheel frame; The flywheel is arranged in the inner flywheel frame, and the flywheel is perpendicular to the plane where the inner flywheel frame and the outer flywheel frame are located; Two inner spring damping bearings are provided between the flywheel and the inner flywheel frame, and the two ends of the inner spring damping bearings are respectively connected to the flywheel and the inner flywheel frame; The outer flywheel frame is sleeved on the outer flywheel frame, two outer spring damping bearings are arranged between the inner flywheel frame and the outer flywheel frame, and two ends of the outer spring damping bearings are respectively connected to the inner flywheel frame and the outer flywheel frame; The two inner spring damping bearings and the two outer spring damping bearings are symmetrically arranged with the flywheel as the center, and the inner spring damping bearings and the outer spring damping bearings are arranged at 90 degrees; The inner flywheel frame and the outer flywheel frame are concentrically arranged annular structures; Among them, when the ocean floating platform sways due to wind, wave and current loads, the inner flywheel frame and the outer flywheel frame sway with the platform, and the flywheel remains relatively stable vertically. The inner flywheel frame and the outer flywheel frame, as well as the flywheel and the inner flywheel frame, rotate relative to each other around the outer spring damping bearing and the inner spring damping bearing respectively. The outer spring damping bearing and the inner spring damping bearing generate anti-roll torque in two horizontal directions. The anti-roll torque is transmitted through the inner flywheel frame and the outer flywheel frame to act on the ocean floating platform to suppress its roll and pitch. The flywheel remains within a certain speed range to provide an effective gyroscopic effect.

2. The integrated flywheel energy storage and roll stabilization device for an offshore floating platform according to claim 1, characterized in that: The flywheel is located in the center of the inner flywheel frame.

3. The integrated flywheel energy storage and anti-roll device for an offshore floating platform according to claim 1, characterized in that: The flywheel is connected to an electronic control device.

4. The integrated flywheel energy storage and roll stabilization device for an offshore floating platform according to claim 1, characterized in that: The flywheel comprises a flywheel housing, two ends of an inner spring damping bearing are respectively connected to the flywheel housing and an inner flywheel frame, and the flywheel housing is sealed and vacuumed.

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