Energy storage flywheel and flywheel energy storage system

Abstract

The present invention discloses an energy storage flywheel and a flywheel energy storage system. The energy storage flywheel includes a flywheel rotor assembly, an energy storage charging assembly, and a controller. The energy storage charging assembly includes a clamping rotating member, a spiral spring energy storage member, and a generator. The clamping rotating member is rotatably connected to the inner wall of the housing and can be locked and released with the flywheel rotor. The spiral spring energy storage member includes a transmission member, a main shaft, a drum, and an energy storage spiral spring. The transmission member is connected between the clamping rotating member and the main shaft, the energy storage spiral spring is connected between the main shaft and the drum, the drum is connected to the rotor of the generator, and a brake for locking and releasing the drum is provided in the housing. The controller can control the locking and releasing of the clamping rotating member and the brake. The energy storage flywheel of the present invention can store energy by using the spiral spring energy storage member after power failure, and finally convert it into electric energy to maintain the normal operation of the magnetic bearing, so that the flywheel rotor will not be unbalanced during the entire process of rotation and stop after power failure, avoiding damage to the flywheel and eliminating potential safety hazards.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage devices, and particularly to an energy storage flywheel and a flywheel energy storage system. Background Art

[0002] A flywheel energy storage system is an efficient and energy-saving inertial energy storage device. It stores energy by using a flywheel rotating at a super-high speed and realizes the mutual conversion of mechanical energy and electrical energy through an electromechanical energy conversion device.

[0003] In related technologies, most energy storage flywheels use magnetic bearings to suspend and support the flywheel rotor. During normal operation, the magnetic bearing control module is powered by an external power grid. When the external power grid is powered off, the energy of the flywheel itself can use an inverter to provide electrical energy for the magnetic bearing control module to maintain the balance of the flywheel rotor. However, as the rotational speed of the flywheel rotor continuously decreases, its own energy is not sufficient to provide enough electrical energy. At this time, only the protective bearing can be used to protect the flywheel rotor. However, since the magnetic bearing has been powered off, it is difficult to maintain the balance of the flywheel rotor, which will cause the flywheel rotor to collide and vibrate with the protective bearing or directly cause damage to the flywheel rotor, posing a safety hazard. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an energy storage flywheel in view of the defects and deficiencies of the prior art. After power failure, the energy storage flywheel can convert the kinetic energy of the flywheel rotor into the elastic potential energy of a spiral spring and store it. When the magnetic bearing control module cannot receive electrical energy from the inverter, the elastic potential energy of the spiral spring is released and converted into electrical energy through a generator to supply power to the magnetic bearing control module, so that the flywheel rotor will not become unbalanced during the entire process of rotation and stop after power failure.

[0005] An embodiment of the present invention further provides a flywheel energy storage system.

[0006] The energy storage flywheel of the embodiment of the present invention comprises: a shell; a flywheel rotor assembly and an energy storage charging assembly, wherein the flywheel rotor assembly and the energy storage charging assembly are both arranged in the shell, the flywheel rotor assembly comprises a flywheel rotor and a magnetic bearing for supporting the flywheel rotor, the energy storage charging assembly comprises a clamping rotating member, a coil spring energy storage member and a generator, the clamping rotating member is rotatably connected to the inner wall of the shell and is arranged opposite to and coaxially with the flywheel rotor, and the clamping rotating member can be locked or separated from the flywheel rotor, the coil spring energy storage member comprises a transmission member, a main shaft, a roller and an energy storage coil spring, the roller and the main shaft are both rotatably connected to the inner wall of the shell and the roller is sleeved on the main shaft on the outside, the transmission member is connected between the clamping rotating member and the main shaft, the energy storage coil spring is connected between the main shaft and the drum, the drum is connected to the rotor of the generator, the generator is used to supply power to the magnetic bearing control module, and a brake that can lock and release the drum is provided in the shell, and the clamping rotating member drives the main shaft to rotate through the transmission member; a controller, the controller is connected to both the clamping rotating member and the brake, and the controller can control the clamping rotating member to lock or separate from the flywheel rotor according to the motion state of the flywheel rotor, and the controller can control the brake to lock or release the drum according to the rotation state of the flywheel rotor.

[0007] The energy storage flywheel of the embodiment of the present invention, the energy storage charging assembly includes a clamping rotating member, a spiral spring energy storage member and a generator. The clamping rotating member is rotatably connected to the inner wall of the housing and is arranged opposite and coaxially with the flywheel rotor. The spiral spring energy storage member includes a transmission member, a main shaft, a drum and an energy storage spiral spring. The drum and the main shaft are both rotatably connected to the inner wall of the housing and the drum is sleeved outside the main shaft. The transmission member is connected between the clamping rotating member and the main shaft. The energy storage spiral spring is connected between the main shaft and the drum. The drum is connected to the rotor of the generator. The generator is used to supply power to the magnetic bearing control module. And a brake for locking and releasing the drum is provided in the housing. The clamping rotating member drives the main shaft to rotate through the transmission member. The controller can control the clamping rotating member to lock or separate from the flywheel rotor according to the motion state of the flywheel rotor, and the controller can control the brake to lock or release the drum according to the rotation state of the flywheel rotor. Thus, when the energy storage flywheel is powered off, as the rotational speed of the flywheel rotor continuously decreases, the controller can control the clamping rotating member to lock with the flywheel rotor so that the clamping rotating member can rotate with the flywheel rotor, and drive the main shaft to rotate through the transmission member. The rotation of the main shaft can pull the energy storage spiral spring to contract for energy storage. Then when the rotational speed of the flywheel rotor is too low to supply power to the magnetic bearing control module through the inverter, the brake releases the rolling, the energy storage spiral spring releases energy and drives the drum to rotate, and then drives the generator to generate electricity to provide electrical energy for the magnetic bearing control module. Furthermore, the flywheel rotor will not be unbalanced due to the lack of power supply of the magnetic bearing control module during the entire rotation and stop process after power off, ensuring that the flywheel rotor will not be unbalanced and damaged in the power-off state of the energy storage flywheel, and eliminating potential safety hazards.

[0008] In some embodiments, the clamping rotating member includes a base and a support member that can be lifted relative to the base. The controller can control the support member to rise to contact and lock with the flywheel rotor or control the support member to descend to separate from the flywheel rotor.

[0009] In some embodiments, the support member is a protective bearing. The flywheel rotor has a groove opposite to the clamping rotating member, and the protective bearing is fitted in the groove.

[0010] In some embodiments, the transmission member is a belt. One end of the belt is sleeved on the clamping rotating member, and the other end is sleeved on the main shaft.

[0011] In some embodiments, the clamping rotating member is integrally connected to the main shaft, and the clamping rotating member and the main shaft are coaxially arranged.

[0012] In some embodiments, the clamping rotating member and the main shaft are both arranged on the inner bottom wall of the housing.

[0013] In some embodiments, the energy storage flywheel further includes a speed increasing gearbox, and the speed increasing gearbox is connected between the drum and the generator.

[0014] In some embodiments, the drum has a cylindrical body and a turntable connected to the cylindrical body. The cylindrical body is sleeved on the outer periphery of the main shaft and connected to the energy storage winding spring. The turntable is connected to the top cover of the cylindrical body and is located at the central position. The turntable is connected to the speed increasing gearbox.

[0015] The flywheel energy storage system according to an embodiment of the present invention includes the energy storage flywheel described in the above embodiment.

[0016] For the flywheel energy storage system according to an embodiment of the present invention, by adopting the above energy storage flywheel, the energy storage charging assembly includes a clamping rotating member, a winding spring energy storage member and a generator. The clamping rotating member is rotatably connected to the inner wall of the housing and is arranged opposite to and coaxially with the flywheel rotor. The winding spring energy storage member includes a transmission member, a main shaft, a drum and an energy storage winding spring. The drum and the main shaft are both rotatably connected to the inner wall of the housing and the drum is sleeved on the outside of the main shaft. The transmission member is connected between the clamping rotating member and the main shaft. The energy storage winding spring is connected between the main shaft and the drum. The drum is connected to the rotor of the generator. The generator is used to supply power to the magnetic bearing control module. And a brake for locking and releasing the drum is provided in the housing. The clamping rotating member drives the main shaft to rotate through the transmission member. The controller can control the clamping rotating member to lock or separate from the flywheel rotor according to the motion state of the flywheel rotor, and the controller can control the brake to lock or release the drum according to the rotation state of the flywheel rotor. Thus, when the energy storage flywheel is powered off, as the rotational speed of the flywheel rotor continuously decreases, the controller can control the clamping rotating member to lock with the flywheel rotor so that the clamping rotating member can rotate with the flywheel rotor, and drive the main shaft to rotate through the transmission member. The rotation of the main shaft can pull the energy storage winding spring to contract for energy storage. Then when the rotational speed of the flywheel rotor is too low to supply power to the magnetic bearing through the inverter, the brake releases the drum, the energy storage winding spring releases energy and drives the drum to rotate, and then drives the generator to generate electricity to provide electrical energy for the magnetic bearing control module. Furthermore, the flywheel rotor will not be unbalanced due to the lack of power supply of the magnetic bearing control module during the entire rotation and stop process after power off, ensuring that the flywheel rotor will not be unbalanced and damaged when the energy storage flywheel is in the power-off state.

[0017] In some embodiments, the flywheel energy storage system further includes a grid power supply unit and a flywheel self-rotation power supply unit. The grid power supply unit is used to supply power to the flywheel energy storage system when the flywheel is operating normally. The flywheel self-rotation power supply unit is used to supply power to the flywheel energy storage system in the initial stage after the flywheel is powered off. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of an energy storage flywheel according to an embodiment of the present invention.

[0019] Figure 2 is a schematic structural diagram of a winding spring energy storage member of an energy storage flywheel according to an embodiment of the present invention.

[0020] Figure 3 It is a schematic structural diagram of a flywheel energy storage system according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] Housing 1, flywheel rotor 2, magnetic bearing 3, clamping rotating member 4, base 41, support member 42, transmission member 5, spring energy storage member 6, main shaft 61, drum 62, turntable 63, energy storage spring 64, brake 7, generator 8, passive magnet 9, speed-up gearbox 10, motor stator 11, energy storage flywheel 100, magnetic bearing control module 200. Specific embodiments

[0023] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0024] As Figure 1 and Figure 2 shown, the energy storage flywheel 100 according to an embodiment of the present invention includes a housing 1, a flywheel rotor assembly, an energy storage charging assembly, and a controller.

[0025] Specifically, both the flywheel rotor assembly and the energy storage charging assembly are disposed inside the housing 1. The flywheel rotor assembly includes a flywheel rotor 2 and a magnetic bearing 3 for supporting the flywheel rotor 2. The energy storage charging assembly includes a clamping rotating member 4, a spring energy storage member 6, and a generator 8. The clamping rotating member 4 is rotatably connected to the inner wall of the housing 1 and is arranged opposite to and coaxially with the flywheel rotor 2, and the clamping rotating member 4 can be locked or separated from the flywheel rotor 2. The spring energy storage member 6 includes a transmission member 5, a main shaft 61, a drum 62, and an energy storage spring 64. The drum 62 and the main shaft 61 are both rotatably connected to the inner wall of the housing 1 and the drum 62 is sleeved outside the main shaft 61. The transmission member 5 is connected between the clamping rotating member 4 and the main shaft 61. The energy storage spring 64 is connected between the main shaft 61 and the drum 62. The drum 62 is connected to the rotor of the generator 8. The generator 8 is used to supply power to the magnetic bearing control module 200. And a brake 7 for locking and releasing the drum 62 is provided inside the housing 1. The clamping rotating member 4 drives the main shaft 61 to rotate through the transmission member 5. The controller is connected to both the clamping rotating member 4 and the brake 7, and the controller can control the clamping rotating member 4 to be locked or separated from the flywheel rotor 2 according to the motion state of the flywheel rotor 2, and the controller can control the brake 7 to lock or release the drum 62 according to the rotation state of the flywheel rotor 2.

[0026] It should be noted that when the flywheel is operating normally, the magnetic bearing control module 200 is powered by the external power grid. When the external power grid is powered off, the flywheel's own energy can use the inverter to provide electrical energy to the magnetic bearing control module 200 to maintain the balance of the flywheel rotor 2. However, as the speed of the flywheel rotor 2 continues to decrease, its own energy is insufficient to provide sufficient electrical energy. At this time, the flywheel rotor 2 can only be protected by protecting the protective bearing. However, since the magnetic bearing 3 has been powered off, the balance of the flywheel rotor 2 is difficult to maintain, which may cause the flywheel rotor 2 to collide and vibrate with the protective bearing or directly cause damage to the flywheel rotor 2.

[0027] The energy storage charging component of the present application can first convert the kinetic energy of the flywheel rotor 2 into the elastic potential energy of the energy storage coil spring 64 and store it. Then, when the speed of the flywheel rotor 2 drops to a point where it is unable to maintain power supply to the magnetic bearing control module 200, the elastic potential energy is released and electricity is generated through the generator 8 to maintain a continuous power supply to the magnetic bearing control module 200, thereby maintaining the balance of the flywheel rotor 2, causing the flywheel rotor 2 to gradually stop in a balanced state, thereby avoiding the phenomenon of imbalance and damage of the flywheel rotor 2 when the power is off.

[0028] Specifically, the specific working process of the energy storage charging component of the present application is as follows: when the controller detects that the speed of the flywheel rotor 2 drops to a preset value, it can control the clamping rotating member 4 to lock with the flywheel rotor 2. The rotation of the flywheel rotor 2 can drive the clamping rotating member 4 to rotate synchronously. The clamping rotating member 4 drives the main shaft 61 to rotate through the transmission member 5. At this time, the controller controls the brake 7 to lock the drum 62. The rotation of the main shaft 61 can drive the energy storage coil spring 64 to contract and store energy. Until the controller detects that the speed of the flywheel rotor 2 drops to a point where it is impossible to supply power to the magnetic bearing control module 200 through the inverter, it can control the brake 7 to release the drum 62. The energy storage coil spring 64 rotates to release energy and drive the drum 62 to rotate. The drum 62 drives the rotor of the generator 8 to rotate to generate electricity. The generator 8 provides electrical energy to the magnetic bearing control module 200 to enable the magnetic bearing 3 to operate normally, thereby maintaining the stability of the flywheel rotor 2 and enabling the flywheel rotor 2 to stop smoothly.

[0029] That is to say, the present application utilizes the energy storage charging component to convert the kinetic energy of the flywheel rotor 2 into the elastic potential energy of the coil spring and store it after the energy storage flywheel 100 is powered off, and when the magnetic bearing control module 200 cannot receive electrical energy from the inverter, the elastic potential energy of the coil spring is released and converted into electrical energy through the generator 8 to supply power to the magnetic bearing control module 200, thereby preventing the flywheel rotor 2 from being unbalanced during the entire rotation and stop process after power failure.

[0030] The energy storage flywheel 100 according to an embodiment of the present invention, the energy storage charging assembly includes a clamping rotating member 4, a spiral spring energy storage member 6, and a generator 8. The clamping rotating member 4 is rotatably connected to the inner wall of the housing 1 and is arranged opposite to and coaxially with the flywheel rotor 2. The spiral spring energy storage member 6 includes a transmission member 5, a main shaft 61, a drum 62, and a energy storage spiral spring 64. The drum 62 and the main shaft 61 are both rotatably connected to the inner wall of the housing 1, and the drum 62 is sleeved outside the main shaft 61. The transmission member 5 is connected between the clamping rotating member 4 and the main shaft 61. The energy storage spiral spring 64 is connected between the main shaft 61 and the drum 62. The drum 62 is connected to the rotor of the generator 8. The generator 8 is used to supply power to the magnetic bearing control module 200. And a brake 7 for locking and releasing the drum 62 is provided in the housing 1. The clamping rotating member 4 drives the main shaft 61 to rotate through the transmission member 5. The controller can control the clamping rotating member 4 to lock or separate from the flywheel rotor 2 according to the motion state of the flywheel rotor 2, and the controller can control the brake 7 to lock or release the drum 62 according to the rotation state of the flywheel rotor 2. Thus, when the energy storage flywheel 100 is powered off, as the rotational speed of the flywheel rotor 2 continuously decreases, the controller can control the clamping rotating member 4 to lock with the flywheel rotor 2 so that the clamping rotating member 4 can rotate with the flywheel rotor 2, and drive the main shaft 61 to rotate through the transmission member 5. The rotation of the main shaft 61 can pull the energy storage spiral spring 64 to contract for energy storage. Then when the rotational speed of the flywheel rotor 2 is too low to supply power to the magnetic bearing control module 200 through the inverter, the brake 7 releases the drum, and the energy storage spiral spring 64 releases energy and drives the drum 62 to rotate, thereby driving the generator 8 to generate electricity to provide electrical energy for the magnetic bearing control module 200. Furthermore, the flywheel rotor 2 will not be unbalanced due to the lack of power supply of the magnetic bearing control module 200 during the entire rotation and stop process after power off, ensuring that the flywheel rotor 2 will not be unbalanced and damaged when the energy storage flywheel 100 is powered off, and eliminating potential safety hazards.

[0031] Optionally, the structural form of the clamping rotating member 4 can be various. For example, as Figure 1 shown, the clamping rotating member 4 includes a base 41 and a support member 42 that can be lifted relative to the base 41. The controller can control the support member 42 to rise to contact and lock with the flywheel rotor 2 or control the support member 42 to lower to separate from the flywheel rotor 2. In other words, the clamping rotating member 4 is a liftable structure, and its contact and separation with the flywheel rotor 2 are realized by lifting, thereby realizing the clamping and release of the flywheel rotor 2.

[0032] Preferably, as Figure 1 shown, the support member 42 is a protective bearing, and the flywheel rotor 2 has a groove opposite to the clamping rotating member 4, and the protective bearing is fitted in the groove. In other words, in addition to being a clamping structural member to realize locking and separation with the flywheel rotor 2, the support member 42 itself can be constructed as a protective bearing to realize the protection function as a traditional protective bearing.

[0033] Preferably, the transmission member 5 is a belt, one end of which is sleeved on the clamping rotating member 4, and the other end is sleeved on the main shaft 61. Thus, at the moment when the clamping rotating member 4 locks with the flywheel rotor 2, the belt can slip and buffer, thereby avoiding damage to the structural members caused by excessive instantaneous stress and improving the smoothness of the transmission process.

[0034] Optionally, the transmission member 5 can also be a transmission gear or other transmission structures, as long as it can achieve the transmission function, and no limitation is made here.

[0035] Preferably, the clamping rotating member 4 is integrally connected to the main shaft 61, and the clamping rotating member 4 and the main shaft 61 are coaxially arranged. Thus, when the clamping rotating member 4 rotates with the flywheel rotor 2, it can directly drive the integrally connected main shaft 61 to rotate, saving layout space, and the clamping rotating member 4 itself can be used as the transmission member 5, saving the number of structural members arranged.

[0036] Preferably, as Figure 1 shown, both the clamping rotating member 4 and the main shaft 61 are arranged on the inner bottom wall of the housing 1.

[0037] Furthermore, the energy storage flywheel 100 further includes a speed-up gearbox 10, and the speed-up gearbox 10 is connected between the drum 62 and the generator 8. Thus, the speed-up gearbox 10 can increase the speed and then drive the generator 8 to generate electricity, improving the power generation efficiency.

[0038] Furthermore, as Figure 1 and Figure 2 shown, the drum 62 has a cylinder body and a turntable 63 connected to the cylinder body. The cylinder body is sleeved on the outer periphery of the main shaft 61 and is connected to the energy storage spring 64. The turntable 63 is connected to the top cover of the cylinder body and is located at the central position, and the turntable 63 is connected to the speed-up gearbox 10. Thus, the turntable 63 arranged in the middle of the top cover of the cylinder body can ensure no eccentric rotation, and the entire energy storage charging system operates reliably.

[0039] Furthermore, as Figure 1 shown, passive magnetic steels 9 for maintaining the axial balance of the flywheel rotor 2 are provided on the bottom wall of the housing 1 and the bottom surface of the flywheel rotor 2. The rotor of the driving motor is sleeved on the outer periphery of the flywheel rotor 2, and the motor stator 11 is connected to the inner wall of the housing 1 and surrounds the outside of the rotor.

[0040] The flywheel energy storage system of the embodiment of the present invention includes the energy storage flywheel 100 of the above embodiment.

[0041] In the flywheel energy storage system according to the embodiment of the present invention, by adopting the above-mentioned energy storage flywheel 100, the energy storage charging assembly includes a clamping rotating member 4, a spiral spring energy storage member 6 and a generator 8. The clamping rotating member 4 is rotatably connected to the inner wall of the housing 1 and is arranged opposite to and coaxially with the flywheel rotor 2. The spiral spring energy storage member 6 includes a transmission member 5, a main shaft 61, a drum 62 and an energy storage spiral spring 64. The drum 62 and the main shaft 61 are both rotatably connected to the inner wall of the housing 1 and the drum 62 is sleeved outside the main shaft 61. The transmission member 5 is connected between the clamping rotating member 4 and the main shaft 61. The energy storage spiral spring 64 is connected between the main shaft 61 and the drum 62. The drum 62 is connected to the rotor of the generator 8. The generator 8 is used to supply power to the magnetic bearing control module 200. And a brake 7 for locking and releasing the drum 62 is provided in the housing 1. The clamping rotating member 4 drives the main shaft 61 to rotate through the transmission member 5. The controller can control the clamping rotating member 4 to lock or separate from the flywheel rotor 2 according to the motion state of the flywheel rotor 2, and the controller can control the brake 7 to lock or release the drum 62 according to the rotation state of the flywheel rotor 2. Thus, when the energy storage flywheel 100 loses power, as the rotational speed of the flywheel rotor 2 continuously decreases, the controller can control the clamping rotating member 4 to lock with the flywheel rotor 2 so that the clamping rotating member 4 can rotate with the flywheel rotor 2, and drive the main shaft 61 to rotate through the transmission member 5. The rotation of the main shaft 61 can pull the energy storage spiral spring 64 to contract for energy storage. Then when the rotational speed of the flywheel rotor 2 is too low to supply power to the magnetic bearing 3 through the inverter, the brake 7 releases the drum, the energy storage spiral spring 64 releases energy and drives the drum 62 to rotate, and then drives the generator 8 to generate electricity to provide electrical energy for the magnetic bearing control module 200, so that the flywheel rotor 2 will not be unbalanced due to the lack of power supply of the magnetic bearing control module 200 during the entire rotation and stop process after power failure, ensuring that the flywheel rotor 2 will not be unbalanced and damaged when the energy storage flywheel 100 is in a power-off state.

[0042] Further, as Figure 3 shown, the flywheel energy storage system further includes a grid power supply unit and a flywheel self-rotation power supply unit. The grid power supply unit is used to supply power to the flywheel energy storage system when the flywheel is operating normally. The flywheel self-rotation power supply unit is used to supply power to the flywheel energy storage system in the initial stage after the flywheel loses power. Then the energy storage charging system realized by the grid power supply unit, the flywheel self-rotation power supply unit and the energy storage charging assembly can enable the flywheel rotor 2 to maintain stable operation under any working conditions.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0045] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0047] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A energy storage flywheel, characterized in that, Comprising: A housing; A flywheel rotor assembly and an energy storage and charging assembly. The flywheel rotor assembly and the energy storage and charging assembly are both disposed within the housing. The flywheel rotor assembly includes a flywheel rotor and a magnetic bearing for supporting the flywheel rotor. The energy storage and charging assembly includes a clamping rotating member, a spring winding energy storage member, and a generator. The clamping rotating member is rotatably connected to the inner wall of the housing and is arranged opposite to and coaxially with the flywheel rotor. And the clamping rotating member can be locked or separated from the flywheel rotor. The spring winding energy storage member includes a transmission member, a main shaft, a drum, and an energy storage spring. The drum and the main shaft are both rotatably connected to the inner wall of the housing and the drum is sleeved outside the main shaft. The transmission member is connected between the clamping rotating member and the main shaft. The energy storage spring is connected between the main shaft and the drum. The drum is connected to the rotor of the generator. The generator is used to supply power to the magnetic bearing control module. And a brake for locking and releasing the drum is provided within the housing. The clamping rotating member drives the main shaft to rotate through the transmission member; A controller, which is connected to both the clamping rotating member and the brake. And the controller can control the clamping rotating member to be locked or separated from the flywheel rotor according to the motion state of the flywheel rotor. And the controller can control the brake to lock or release the drum according to the rotation state of the flywheel rotor.

2. The energy storage flywheel according to claim 1, wherein, The clamping rotating member includes a base and a support member that can be lifted and lowered relative to the base. The controller can control the support member to rise to contact and lock with the flywheel rotor or control the support member to lower to separate from the flywheel rotor.

3. The energy storage flywheel according to claim 2, characterized in that, The support member is a protective bearing. The flywheel rotor has a groove opposite to the clamping rotating member. The protective bearing is fitted within the groove.

4. The energy storage flywheel according to claim 1, wherein The transmission member is a belt. One end of the belt is sleeved on the clamping rotating member and the other end is sleeved on the main shaft.

5. The energy storage flywheel according to claim 1, wherein The clamping rotating member is integrally connected to the main shaft and the clamping rotating member and the main shaft are coaxially arranged.

6. The energy storage flywheel according to claim 1, wherein Both the clamping rotating member and the main shaft are disposed on the inner bottom wall of the housing.

7. The energy storage flywheel according to claim 1, wherein It further includes a speed increasing gearbox, which is connected between the drum and the generator.

8. The energy storage flywheel according to claim 7, wherein, The drum has a cylinder body and a turntable connected to the cylinder body. The cylinder body is sleeved outside the main shaft and is connected to the energy storage spring. The turntable is connected to the top cover of the cylinder body and is located at the central position. The turntable is connected to the speed increasing gearbox.

9. A flywheel energy storage system, characterized in that, Including the energy storage flywheel according to any one of claims 1 - 8.

10. The flywheel energy storage system according to claim 9, characterized in that, It further includes a grid power supply unit and a flywheel self - rotation power supply unit. The grid power supply unit is used to supply power to the flywheel energy storage system during normal operation of the flywheel. The flywheel self - rotation power supply unit is used to supply power to the flywheel energy storage system in the initial stage when the flywheel is powered off.

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