Double-flywheel nested energy storage device

Abstract

The invention discloses a double-flywheel nested energy storage device which comprises a machine shell and a vacuum cavity used for containing a wheel body, and further comprises a stretching column arranged on the wheel body and an electromagnetic bearing supporting the wheel body to rotate, a control module for controlling the rotating speed of the wheel body is arranged on the machine shell, and a speed adjusting structure for adjusting the rotating diameter of the wheel body is arranged on the machine shell. The speed adjusting structure comprises a plurality of sets of axial grooves which are formed in the wheel body and annularly and evenly distributed around the circle center of the wheel body, the wheel body is provided with a swing distance assembly for synchronously adjusting the horizontal distance between the multiple sets of axis bases and the circle center of the wheel body, and the axis bases are provided with balance weight assemblies for adjusting the relative positions of the gravity blocks and the axis bases according to the rotating speed of the wheel body. By arranging the speed adjusting assembly, the position of the gravity block in the wheel body is dynamically adjusted, then the rotational inertia is effectively improved, more kinetic energy can be stored at the same rotating speed, the adjusting mechanism enables the device to adapt to different operation requirements, and efficient response can be achieved from efficient energy storage to rapid energy release.

Description

Technical Field

[0001] The invention relates to the technical field of flywheel energy storage devices, in particular to a double-flywheel nested energy storage device. Background Art

[0002] A flywheel energy storage device is a system that uses the kinetic energy of a rotating flywheel to store and release energy. This device converts electrical energy into mechanical energy through a motor, which accelerates the flywheel to high speed, thereby storing energy in the flywheel in the form of kinetic energy. When electrical energy is needed, the system converts the stored mechanical energy back into electrical energy by slowing down the flywheel.

[0003] Chinese patent (Announcement No.: CN116404802B), the scheme specifically includes energy storage components, bottom plates, storage boxes, cylinders, and also includes pressurization components and cooling components. By setting up the pressurization component, the power of the flywheel rotation is used as the power source to pressurize the carbon dioxide gas and prepare for cooling; by setting up the cooling component, the carbon dioxide can be evenly sprayed to the parts with higher temperatures of the energy storage device to achieve rapid and automatic cooling, ensure the normal operation of the equipment, and extend the service life of the equipment; by setting up the pressurization component, it can automatically and quickly detach from the energy storage device, reduce the energy consumption of the energy storage device, and improve the efficiency of energy storage; it is suitable for temperature control of the energy storage process and energy release process of the device, and its scope of application is wider.

[0004] When the existing flywheel energy storage device is in use, the diameter size of the flywheel remains unchanged. In the process of converting electrical energy into mechanical energy, it is difficult to store higher energy by changing the diameter. At the same time, when converting mechanical energy into electrical energy, it is difficult to increase the rotation speed by reducing the diameter to achieve the purpose of rapid conversion. Therefore, it is difficult to be suitable for the use scenarios of large-scale storage of mechanical energy and rapid release of electrical energy. Therefore, a double flywheel nested energy storage device is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a double flywheel nested energy storage device, which has the advantages of adapting to different operating requirements and being able to efficiently cope with everything from efficient energy storage to rapid energy release, thereby solving the problem of being difficult to apply to large-scale storage of mechanical energy and rapid release of electrical energy.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a double flywheel nested energy storage device, comprising a housing and a vacuum chamber therein for accommodating a wheel body, and also comprising a column arranged on the wheel body and an electromagnetic bearing for supporting the rotation of the wheel body, a control module for controlling the rotation speed of the wheel body is arranged on the housing, and a speed regulating structure for adjusting the rotation diameter of the wheel body is arranged on the housing;

[0007] The speed regulating structure comprises a plurality of axial grooves formed on the wheel body and evenly distributed in a ring shape with the center of the wheel body, wherein the plurality of axial grooves are all slidably connected with axle seats, and the wheel body is provided with a swing distance component for synchronously adjusting the horizontal distance between the plurality of axle seats and the center of the wheel body;

[0008] A plurality of groups of the axle seats are provided with gravity blocks, and the axle seats are provided with a counterweight assembly for adjusting the relative position of the gravity blocks and the axle seats according to the rotation speed of the wheel body;

[0009] The casing is provided with a magnetic component for adjusting the resistance value of the circuit where the electromagnetic bearing is located, and the casing is also provided with a circulation component for cooling the electromagnetic bearing at a position corresponding to the electromagnetic bearing.

[0010] Preferably, the swing assembly comprises a central column coaxial with the wheel body and freely lifting and lowering in the wheel body, a circular plate is fixedly connected to the central column, a swing rod is fixedly rotated on the circular plate, and one end of the swing rod away from the central column is fixedly rotated on the axle seat;

[0011] The wheel body is fixedly connected with a pressure sensor at a moving position corresponding to the central column, and the control module includes a signal processing module which is electrically connected to the pressure sensor and receives and processes a pressure signal of the pressure sensor.

[0012] Preferably, the counterweight assembly includes an inner cavity groove opened on the axle center seat and connected to the gravity block for horizontal sliding connection, and an electromagnet corresponding to the gravity block is fixedly connected to one end of the axle center seat away from the center of the wheel body;

[0013] The gravity block is provided with a plurality of groups of eccentric springs, and two ends of the eccentric springs are respectively fixedly connected to the gravity block and the inner wall of the axle center seat.

[0014] Preferably, the electromagnet and the gravity block are not in contact in an initial state, and the eccentric spring is in a naturally extended state.

[0015] Preferably, the magnetic assembly comprises a side plate fixedly connected to the housing, the side plate is provided with a swing circle freely rotating in the vertical direction, a sliding rheostat is radially fixed on the swing circle, the sliding rheostat is electrically connected to the electromagnetic bearing, and the sliding rheostat comprises an integrally formed sliding rheostat;

[0016] The magnetic assembly also includes an axial block that moves freely along the radial direction of the positioning circle, and the axial block is fixedly connected to the sliding sheet.

[0017] Preferably, an axial groove is provided on the positioning circle, an axial block is slidably connected in the axial groove, a freely rotatable threaded rod is also provided in the axial groove, the threaded rod rotates on the positioning circle with a fixed axis, and the threaded rod is threadedly connected to the axial block.

[0018] Preferably, the circulation assembly comprises a piston cylinder fixedly connected to the side plate, a piston plate is arranged inside the piston cylinder, and the outer peripheral surface of the piston plate is in sliding contact with the inner wall of the piston cylinder, and a transverse seat is arranged on the side plate and a rectangular groove is provided for the transverse seat to slide vertically;

[0019] The traverse seat is fixedly connected with a push column, which slides through the piston cylinder and is fixedly connected with the piston plate. A connecting rod is fixedly rotated on the traverse seat, and one end of the connecting rod away from the traverse seat is fixedly rotated on the axial block.

[0020] Preferably, the housing is provided with an annular cooling pipe which is in contact with the electromagnetic bearing at a position corresponding to the electromagnetic bearing, a liquid inlet pipe and a liquid outlet pipe are fixedly passed through the piston cylinder, and an end of the liquid outlet pipe away from the piston cylinder is fixedly passed through the annular cooling pipe;

[0021] The housing is fixedly connected with a temperature sensor for detecting the temperature of the electromagnetic bearing, and the temperature sensor is electrically connected to the data processing module.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention sets a speed regulating component to dynamically adjust the position of the gravity block in the wheel body, thereby effectively increasing the moment of inertia, so that more kinetic energy can be stored at the same rotation speed. This adjustment mechanism enables the device to adapt to different operating requirements, from efficient energy storage to rapid energy release.

[0024] 2. The present invention sets a magnetic component, and the electromagnetic bearing adapts to the increase in flywheel diameter and the change in weight distribution by increasing the current and the corresponding magnetic force. This not only improves the bearing capacity of the bearing, but also enhances the stability of the system during high-speed rotation, which is of great significance for maintaining the long-term operation of the equipment and reducing maintenance costs.

[0025] 3. By setting up a circulating current component, the present invention can effectively control the temperature of the electromagnetic bearing under high temperature conditions caused by increased current, prevent overheating, and ensure the safe operation of the system. This cooling mechanism plays a key role in extending the life of the equipment and maintaining stable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the components where the wheel body of the present invention is located;

[0028] Figure 3 This is a schematic diagram of the distribution state of the shaft seat of the present invention;

[0029] Figure 4This is a schematic diagram of the components where the center column of the present invention is located;

[0030] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 This is a schematic diagram of the components of the electromagnetic bearing of the present invention;

[0032] Figure 7 It is a schematic diagram of the components where the transverse shift seat of the present invention is located;

[0033] Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle.

[0034] In the figure: 1, casing; 2, wheel body; 3, electromagnetic bearing; 4, extension column; 5, vacuum chamber; 6, axial groove; 7, axis seat; 8, gravity block; 9, eccentric spring; 10, inner cavity groove; 11, electromagnet; 12, center column; 13, rocker rod; 14, pressure sensor; 15, side plate; 16, piston cylinder; 17, piston plate; 18, rocker circle; 19, axis groove; 20, threaded rod; 21, axis block; 22, sliding rheostat; 221, sliding vane; 23, connecting rod; 24, transverse seat; 25, push column; 26, annular cooling pipe; 27, temperature sensor; 28, liquid outlet pipe. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 8 The present invention provides a technical solution: a double flywheel nested energy storage device, comprising a housing 1 and a vacuum chamber 5 therein for accommodating a wheel body 2, and also comprising a column 4 arranged on the wheel body 2 and an electromagnetic bearing 3 for supporting the rotation of the wheel body 2, a control module for controlling the rotation speed of the wheel body 2 is arranged on the housing 1, and a speed regulating structure for adjusting the rotation diameter of the wheel body 2 is arranged on the housing 1;

[0037] The speed regulating structure comprises a plurality of axial grooves 6 which are formed on the wheel body 2 and are evenly distributed in a ring shape with the center of the wheel body 2, wherein the plurality of axial grooves 6 are all slidably connected with axle seats 7, and the wheel body 2 is provided with a swing distance assembly for synchronously adjusting the horizontal distance between the plurality of axle seats 7 and the center of the wheel body 2;

[0038] A plurality of groups of the axle seats 7 are provided with gravity blocks 8, and the axle seats 7 are provided with counterweight components for adjusting the relative position of the gravity blocks 8 and the axle seats 7 according to the rotation speed of the wheel body 2;

[0039] The housing 1 is provided with a magnetic component for adjusting the resistance value of the circuit where the electromagnetic bearing 3 is located, and the housing 1 is also provided with a circulation component for cooling the electromagnetic bearing 3 at a position corresponding to the electromagnetic bearing 3 .

[0040] like Figure 1-Figure 3 As shown, the flywheel storage device converts electrical energy into mechanical potential energy of the rotation of the wheel body 2, and stores electrical energy in the form of mechanical energy through energy conversion, wherein, when the wheel body 2 is in a stationary state, the axial spacing between the multiple groups of axle seats 7 and the center of the wheel body 2 is the smallest, that is, the diameter of the wheel body 2 is at a minimum at this time, and a gravity block 8 is provided in the axle seat 7, and the unit mass of the gravity block 8 is greater than the unit mass of the wheel body 2. In the initial state, the axial spacing between the gravity block 8 and the center of the wheel body 2 is also the smallest.

[0041] At the same time, when the electrical energy is converted into the mechanical potential energy of the wheel body 2, the wheel body 2 rotates horizontally. As the wheel body 2 gradually accelerates from a stationary state, the gravity block 8 gradually deviates from the center of the wheel body 2, that is, the distance between the gravity block 8 and the center of the wheel body 2 gradually increases, thereby causing the relative position of the gravity block 8 and the wheel body 2 to gradually deviate toward the outer periphery of the wheel body 2.

[0042] Among them, by dynamically adjusting the position of the gravity block 8, when the wheel body 2 is in the initial state, the gravity distribution of the components thereon is mainly located near the center of the circle, thereby ensuring the stability of the wheel body 2 during the initial rotation. In addition, as the rotation speed of the wheel body 2 increases, the position of the gravity block 8 can be adjusted to change the mass distribution on the wheel body 2, thereby effectively increasing the moment of inertia.

[0043] The calculation formula of its moment of inertia is: I = k*m*r 2 ;

[0044] Among them, I: represents the moment of inertia, which is a physical quantity that measures the resistance of an object to change in rotational state. The larger the moment of inertia, the smaller the ability of the object to accelerate or decelerate under the same torque, that is, the more difficult it is for the object to change its rotational state;

[0045] k: expressed as shape factor, also called mass distribution factor, which depends on the geometric shape and mass distribution of the object;

[0046] m: represents the total mass of the object;

[0047] r: It is expressed as the distance to the rotation axis. In this document, it is mainly the horizontal distance between the mass point where the weight of the components on the wheel body 2 is distributed and the center of the wheel body 2 or the electromagnetic bearing 3.

[0048] By changing the relative position between the gravity block 8 and the wheel body 2, the value of r in the calculation formula is changed, so that the counterweight is moved away from the rotation center point, so as to achieve the purpose of storing more kinetic energy at the same rotation speed.

[0049] At the same time, when the rotation speed of the wheel body 2 reaches the set value, the multiple groups of axle seats 7 are driven to move in the horizontal direction through the swing distance group arranged thereon, and the distance between the gravity block 8 on the axle seat 7 and the center of the wheel body 2 is further increased, wherein the rotation speed of the wheel body 2 is gradually increased to the set value, at which time the electrical energy is converted into mechanical energy. After the rotation speed reaches the set value, the rotation diameter of the wheel body 2 can be increased by adjusting the horizontal distance of the gravity blocks 8 on the wheel body 2. According to the law of conservation of angular momentum, at this time, if the wheel body 2 is not subjected to external torque, the angular momentum of the wheel body 2 should remain unchanged, and then when I increases, its angular velocity must decrease to maintain the conservation of angular momentum.

[0050] In actual use, since the electric energy may be in uninterrupted conversion, when the swing assembly is running, the change in the angular velocity of the wheel body 2 is related to the conversion efficiency of the electric energy. However, due to the increase in the distance between the multiple groups of gravity blocks 8 and the center of the wheel body 2, in the subsequent energy storage process, as the rotation speed of the wheel body 2 gradually increases, the upper limit of its energy storage is increased, wherein the stored kinetic energy E k The calculation formula is as follows:

[0051]

[0052] Among them, E k : It is expressed as the kinetic energy of the wheel body 2, that is, the energy stored in the wheel body 2 and its components;

[0053] w: angular velocity, here it is the angular velocity of the mass distribution point in the wheel body 2;

[0054] In the actual process, by adjusting the distance between the gravity block 8 and the center of the wheel body 2, the value of I is increased, and then when the wheel body 2 is at the maximum w, more kinetic energy can be stored.

[0055] At the same time, driven by the swing assembly, the relative positions of the gravity block 8 and the wheel body 2 change. In order to ensure the stability of the rotation of the wheel body 2 and its internal components, the resistance value of the circuit where the electromagnetic bearing 3 is located is adjusted by the magnetic assembly. As the distance between the gravity block 8 and the center of the wheel body 2 increases, the current value at the electromagnetic bearing 3 is increased to enhance the magnetism of the electromagnetic bearing 3, thereby improving the stability of the wheel body 2 and its components during rotation, so that it can more effectively resist potential vibrations and instability factors caused by mass distribution and expansion of outer diameter.

[0056] It should be noted that when the current value at the electromagnetic bearing 3 increases, resistance heat will be generated when the current flows through the coil in the electromagnetic bearing 3. This heat is generated by the resistance blocking the current when the current passes through a conductor with resistance. The coil impedance of the electromagnetic bearing 3 will convert part of the electrical energy into thermal energy, causing the temperature to rise. Therefore, through the circulating current component set on the casing 1, when the current at the electromagnetic bearing 3 increases, the cooling effect on the position of the electromagnetic bearing 3 can be further improved to ensure the service life of the electromagnetic bearing 3.

[0057] In one of the more preferred embodiments, the swing assembly includes a central column 12 which is coaxial with the wheel body 2 and can be lifted and lowered freely in the wheel body 2, a circular plate is fixedly connected to the central column 12, a swing rod 13 is fixedly rotated on the circular plate, and one end of the swing rod 13 away from the central column 12 is fixedly rotated on the shaft seat 7;

[0058] The wheel body 2 is fixedly connected with a pressure sensor 14 at a moving position corresponding to the central column 12 , and the control module includes a signal processing module which is electrically connected to the pressure sensor 14 and receives and processes a pressure signal from the pressure sensor 14 .

[0059] like Figure 3 and Figure 4 As shown, when the rotation speed of the wheel body 2 reaches the set value, the center column 12 can move in the vertical direction driven by the electric push rod arranged on the wheel body 2, wherein the height change of the center column 12 can drive the rocker arm 13 to deflect in the vertical direction, thereby pushing the axle seat 7 to slide in the axial groove 6, and then adjusting the horizontal position of the axle seat 7 to change the distance between its internal gravity block 8 and the center of the wheel body 2.

[0060] Among them, in the initial state, the elastic pressing piece arranged at the bottom of the center column 12 is not in contact with the pressure sensor 14. As the center column 12 moves downward and changes the horizontal position of the shaft seat 7, the elastic pressing piece is in contact with the pressure sensor 14. At this time, the pressure sensor 14 remotely transmits the received pressure signal to the signal processing module. After receiving and processing the pressure signal, the signal processing module responds to the position change of the shaft seat 7 in time and takes countermeasures according to the change.

[0061] Based on the swing assembly embodiment, the counterweight assembly includes an inner cavity groove 10 opened on the axle seat 7 and connected to the gravity block 8 for horizontal sliding, and an electromagnet 11 corresponding to the gravity block 8 is fixedly connected to one end of the axle seat 7 away from the center of the wheel body 2;

[0062] The gravity block 8 is provided with a plurality of eccentric springs 9 , and two ends of the eccentric springs 9 are fixedly connected to the gravity block 8 and the inner wall of the axle center seat 7 , respectively.

[0063] The electromagnet 11 and the gravity block 8 are not in contact in the initial state, and the eccentric spring 9 is in a naturally extended state.

[0064] like Figure 4 and Figure 6 As shown, in the initial state, the gravity block 8 is on the side close to the center of the wheel body 2. As the wheel body 2 rotates, the gravity block 8 drives the eccentric spring 9 to gradually stretch and deform under the action of the eccentric force, thereby driving the distance between the gravity block 8 and the electromagnet 11 to gradually decrease. At the same time, the electromagnet 11 can generate a magnetic force to attract the gravity block 8 when it is started. In the initial state, the distance between the gravity block 8 and the electromagnet 11 is not enough for the electromagnet 11 to adsorb the gravity block 8. However, as the rotation speed of the wheel body 2 gradually increases, the gravity block 8 is adsorbed by the electromagnet 11, so that the gravity block 8 is located at the outer periphery of the wheel body 2, so as to achieve the purpose of adjusting the mass distribution of the wheel body 2 and its components.

[0065] On the basis of the embodiment of the counterweight assembly, the magnetic assembly includes a side plate 15 fixedly connected to the housing 1, the side plate 15 is provided with a swing circle 18 that can rotate freely in the vertical direction, a sliding rheostat 22 is radially fixed on the swing circle 18, the sliding rheostat 22 is electrically connected to the electromagnetic bearing 3, and the sliding rheostat 22 includes an integrally formed sliding rheostat 22;

[0066] The magnetic assembly further includes an axial block 21 which is free to move radially along the positioning circle 18 , and the axial block 21 is fixedly connected to the sliding piece 221 .

[0067] The positioning circle 18 is provided with an axial groove 19, in which an axial block 21 is slidably connected. A freely rotatable threaded rod 20 is also provided in the axial groove 19. The threaded rod 20 rotates on the positioning circle 18 with a fixed axis, and the threaded rod 20 is threadedly connected to the axial block 21.

[0068] like Figure 6-Figure 8 As shown, after the data processing module processes the received pressure signal, it can control the operation of the motor on the positioning circle 18, thereby driving the threaded rod 20 driven by the motor output shaft to rotate, thereby driving the threaded connection with the threaded rod 20 to move along the opening direction of the axial slot 19, wherein the axial block 21 is fixedly connected to the sliding piece 221, thereby adjusting the resistance value of the circuit where the sliding rheostat 22 is located, and by reducing the resistance value of the circuit where the sliding rheostat 22 is located, the current value at the electromagnetic bearing 3 electrically connected to the sliding rheostat 22 is increased, thereby achieving the purpose of enhancing the magnetism at the electromagnetic bearing 3, and ensuring the stability of the wheel body 2 and its components during rotation.

[0069] On the basis of the embodiment of the magnetic assembly, the circulation assembly comprises a piston cylinder 16 fixedly connected to the side plate 15, a piston plate 17 is arranged in the piston cylinder 16, and the outer peripheral surface of the piston plate 17 is in sliding contact with the inner wall of the piston cylinder 16, and a transverse seat 24 is arranged on the side plate 15 and a rectangular groove is provided for the transverse seat 24 to slide vertically;

[0070] The lateral shift seat 24 is fixedly connected with a push column 25 , which slides through the piston cylinder 16 and is fixedly connected to the piston plate 17 . A connecting rod 23 is fixedly rotated on the lateral shift seat 24 , and one end of the connecting rod 23 away from the lateral shift seat 24 is fixedly rotated on the axial block 21 .

[0071] The casing 1 is provided with an annular cooling pipe 26 which is in contact with the electromagnetic bearing 3 at the position corresponding to the electromagnetic bearing 3, and a liquid inlet pipe and a liquid outlet pipe 28 are fixedly passed through the piston cylinder 16, and the end of the liquid outlet pipe 28 away from the piston cylinder 16 is fixedly passed through the annular cooling pipe 26, and a temperature sensor 27 for detecting the temperature at the electromagnetic bearing 3 is fixedly connected to the casing 1, and the temperature sensor 27 is electrically connected to the data processing module.

[0072] like Figure 6-Figure 8 As shown, when the positioning circle 18 rotates freely in the vertical direction, it can drive the axial block 21 set thereon to rotate synchronously, and drive the connecting rod 23 to swing synchronously, and the connecting rod 23 and the liquid outlet pipe 28 rotate around a fixed axis, thereby driving the transverse displacement seat 24 and the connecting rod 23 set thereon to reciprocate in the vertical direction.

[0073] At the same time, the push column 25 is fixedly connected to a piston plate 17, and the piston plate 17 is slidably arranged on the piston cylinder 16. Therefore, through the reciprocating motion of the piston plate 17 in the piston cylinder 16, the coolant in the liquid tank is driven into the piston cylinder 16 through the liquid inlet pipe, and the liquid tank is fixedly arranged on the casing 1. At the same time, the coolant in the piston cylinder 16 is pushed into the annular cooling pipe 26 as the piston plate 17 moves, and the gas between the annular cooling pipe 26 and the liquid tank is connected, so that the coolant flows back into the liquid tank again.

[0074] Among them, a group of one-way valves with opposite valve ports are respectively provided on the liquid inlet pipe and the liquid outlet pipe 28. The two groups of one-way valves are set to limit the cooling flow direction to ensure that the coolant can circulate into the annular cooling pipe 26 to ensure the cooling effect on the electromagnetic bearing 3.

[0075] It should be noted that, in actual use, the displacement of the transverse shift seat 24, the push column 25 and the piston plate 17 in the vertical direction is related to the distance between the axial block 21 and the rotation center point of the positioning circle 18. When the axial block 21 moves away from the rotation center point of the positioning circle 18 along the opening direction of the axial slot 19, the axial block 21 rotates with the positioning circle 18, and the reciprocating stroke distance of the transverse shift seat 24 and the piston plate 17 in the vertical direction increases. Therefore, when the positioning circle 18 rotates one circle, a larger volume of coolant can be sucked to flow to the annular cooling pipe 26, thereby improving the cooling effect on the electromagnetic bearing 3 to ensure the service life of the electromagnetic bearing 3, help maintain the electromagnetic bearing 3 within the optimal operating temperature range, and thus help optimize its efficiency and response speed. Cooling also helps to reduce dimensional changes caused by thermal expansion and contraction, thereby improving overall stability and reliability.

[0076] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double flywheel nested energy storage device, comprising a housing (1) and a vacuum chamber (5) therein for accommodating a wheel body (2), further comprising a column (4) arranged on the wheel body (2) and an electromagnetic bearing (3) for supporting the wheel body (2) to rotate, a control module for controlling the rotation speed of the wheel body (2) being arranged on the housing (1), characterized in that: The housing (1) is provided with a speed regulating structure for adjusting the rotation diameter of the wheel body (2); The speed regulating structure comprises a plurality of groups of axial grooves (6) which are formed on the wheel body (2) and are evenly distributed in a ring shape with the center of the wheel body (2); axle seats (7) are slidably connected in the plurality of groups of axial grooves (6); and a swing distance assembly for synchronously adjusting the horizontal distance between the plurality of groups of axle seats (7) and the center of the wheel body (2) is provided on the wheel body (2); A plurality of groups of the axle seats (7) are provided with gravity blocks (8), and the axle seats (7) are provided with a counterweight assembly for adjusting the relative position of the gravity blocks (8) and the axle seats (7) according to the rotation speed of the wheel body (2); The housing (1) is provided with a magnetic component for adjusting the resistance value of the circuit where the electromagnetic bearing (3) is located, and the housing (1) is also provided with a circulation component for cooling the electromagnetic bearing (3) at a position corresponding to the electromagnetic bearing (3).

2. A double flywheel nested energy storage device according to claim 1, characterized in that: The swing assembly comprises a central column (12) which is coaxial with the wheel body (2) and can be freely lifted and lowered in the wheel body (2); a circular plate is fixedly connected to the central column (12); a swing rod (13) is fixedly rotated on the circular plate; and one end of the swing rod (13) away from the central column (12) is fixedly rotated on the shaft center seat (7); The wheel body (2) is fixedly connected to a pressure sensor (14) at a moving position corresponding to the central column (12), and the control module comprises a signal processing module which is electrically connected to the pressure sensor (14) and receives and processes a pressure signal from the pressure sensor (14).

3. A double flywheel nested energy storage device according to claim 2, characterized in that: The counterweight assembly comprises an inner cavity groove (10) which is provided on the axle center seat (7) and is connected to the gravity block (8) for horizontal sliding. An electromagnet (11) corresponding to the gravity block (8) is fixedly connected to one end of the axle center seat (7) away from the center of the wheel body (2); The gravity block (8) is provided with a plurality of groups of eccentric springs (9), and the two ends of the eccentric springs (9) are respectively fixedly connected to the gravity block (8) and the inner wall of the axle center seat (7).

4. A double flywheel nested energy storage device according to claim 3, characterized in that: The electromagnet (11) and the gravity block (8) are not in contact in the initial state, and the eccentric spring (9) is in a naturally extended state.

5. A double flywheel nested energy storage device according to claim 4, characterized in that: The magnetic assembly comprises a side plate (15) fixedly connected to the housing (1), the side plate (15) being provided with a swing circle (18) freely rotating in a vertical direction, a sliding rheostat (22) being radially fixed on the swing circle (18), the sliding rheostat (22) being electrically connected to the electromagnetic bearing (3), and the sliding rheostat (22) comprising an integrally formed sliding rheostat (22); The magnetic component also includes an axial block (21) that moves freely radially along the positioning circle (18), and the axial block (21) is fixedly connected to the sliding plate (221).

6. A double flywheel nested energy storage device according to claim 5, characterized in that: The positioning circle (18) is provided with an axial groove (19), an axial block (21) is slidably connected in the axial groove (19), a freely rotatable threaded rod (20) is also provided in the axial groove (19), the threaded rod (20) is fixedly axially rotated on the positioning circle (18), and the threaded rod (20) and the axial block (21) are threadedly connected.

7. A double flywheel nested energy storage device according to claim 6, characterized in that: The circulation assembly comprises a piston cylinder (16) fixedly connected to a side plate (15), a piston plate (17) is arranged inside the piston cylinder (16), and the outer peripheral surface of the piston plate (17) is in sliding contact with the inner wall of the piston cylinder (16), and a transverse seat (24) is arranged on the side plate (15) and a rectangular groove is provided for the transverse seat (24) to slide vertically; A push column (25) is fixedly connected to the transverse shift seat (24). The push column (25) slides through the piston cylinder (16) and is fixedly connected to the piston plate (17). A connecting rod (23) is fixedly rotated on the transverse shift seat (24). One end of the connecting rod (23) away from the transverse shift seat (24) is fixedly rotated on the axial block (21).

8. A double flywheel nested energy storage device according to claim 7, characterized in that: The housing (1) is provided with an annular cooling pipe (26) which is in contact with the electromagnetic bearing (3) at a position corresponding to the electromagnetic bearing (3); a liquid inlet pipe and a liquid outlet pipe (28) are fixedly connected through the piston cylinder (16); and an end of the liquid outlet pipe (28) which is away from the piston cylinder (16) is fixedly connected to the annular cooling pipe (26); A temperature sensor (27) for detecting the temperature of the electromagnetic bearing (3) is fixedly connected to the housing (1), and the temperature sensor (27) is electrically connected to the data processing module.

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