Flywheel energy storage and carbon dioxide composite energy storage system

Abstract

The flywheel energy storage and carbon dioxide composite energy storage system comprises an integrated plate, a high-pressure tank, an energy storage power generation mechanism and a piston type compressor are fixedly installed on the upper surface of the integrated plate, a turbine generator is fixedly installed at one end of the upper surface of the energy storage power generation mechanism, and the other end of a rotating shaft of the turbine generator rotationally penetrates out of the tail; a first transmission wheel is fixedly mounted on the outer surface of the rotating shaft rotationally penetrating out of the tail, a transmission belt sleeves the outer surface of the first transmission wheel, and the other end of the transmission belt sleeves the outer surface of the kinetic energy recovery mechanism. Through the design of the energy storage power generation mechanism and the kinetic energy recovery mechanism, the impeller is driven through magnetic coupling in the initial rotation stage, only kinetic energy stored by the flywheel needs to be consumed in the impeller starting stage, and energy waste caused by the fact that a large amount of high-pressure gas needs to overcome static friction when a traditional turbine is started is avoided; and redundant rotating kinetic energy can be directly converted into compression work of the piston type compressor, and system-level energy self-circulation is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of energy storage and energy utilization, and in particular to a flywheel energy storage and carbon dioxide composite energy storage system. Background Art

[0002] As the global energy structure transforms toward low-carbonization, the penetration rate of renewable energy (such as wind power and photovoltaics) continues to increase, but due to its inherent intermittent and volatile nature, it poses a severe challenge to the stability of the power grid. Traditional energy storage technologies (such as lithium-ion batteries and pumped storage) have bottlenecks such as high cost, short life, and strong geographical restrictions. There is an urgent need to develop new energy storage systems that are efficient, environmentally friendly, and highly adaptable. The flywheel energy storage and carbon dioxide composite energy storage system came into being. It combines the millisecond response speed of flywheel energy storage with the long-term and large-capacity characteristics of carbon dioxide energy storage to form a complementary and synergistic innovative architecture. The system uses flywheel energy storage to achieve instantaneous power regulation of the power grid and uses carbon dioxide energy storage to meet long-term energy storage needs.

[0003] However, in the prior art, the liquid carbon dioxide is evaporated into gas to drive the turbine generator to rotate and generate electricity when the turbine generator is stationary, and then a large amount of high-pressure carbon dioxide gas needs to impact the impeller to overcome the inertial resistance. This process consumes a large amount of stored carbon dioxide in a short period of time, resulting in a shortened effective discharge time of the system and a reduction in the overall energy storage efficiency. It is not possible to save energy by applying magnetic traction force to the rotating flywheel during the initial rotation of the traction turbine generator. Summary of the invention

[0004] The purpose of the present invention is to provide a flywheel energy storage and carbon dioxide composite energy storage system to solve the problem raised in the above background technology that the rotating flywheel cannot apply magnetic traction force to save energy during the initial rotation of the traction turbine generator.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A flywheel energy storage and carbon dioxide composite energy storage system, comprising: an integrated board, a high-pressure tank, an energy storage power generation mechanism and a piston compressor are fixedly mounted on the upper surface of the integrated board, a turbine generator is fixedly mounted on one end of the upper surface of the energy storage power generation mechanism, two groups of air pipes are connected and mounted on the outer surface of the high-pressure tank, solenoid valves are connected and mounted on the middle ends of the outer surfaces of the two groups of air pipes, the other end of one group of air pipes is connected to the fan cover of the turbine generator, and the other end of the other group of air pipes is connected to the exhaust port of the piston compressor, so that the air inlet at the other end of the piston compressor is connected to the carbon dioxide storage device, so that the piston compressor can compress the injected carbon dioxide into liquid and store it in the high-pressure tank through the exhaust port;

[0007] The energy storage power generation mechanism can fit with the fan blade cover of the turbine generator by sliding, so that the energy storage power generation mechanism can pull the impeller in the fan blade cover to rotate initially by magnetic attraction during the energy storage process;

[0008] Among them, during the peak period of electricity consumption, the liquid carbon dioxide stored in the high-pressure tank can be evaporated into gas and rushed into the fan cover through the air pipe to blow the impeller to rotate, thereby driving the turbine generator to generate electricity and release energy;

[0009] Among them, the other end of the rotating shaft of the turbine generator rotates out from the tail, and a protective cover is mounted on the outer surface. The protective cover is fixedly installed on one end of the turbine generator, and a first transmission wheel is fixedly installed on the outer surface of the rotating shaft that rotates out from the tail and is covered by the protective cover. A transmission belt is mounted on the outer surface of the first transmission wheel, and the other end of the transmission belt is mounted on the outer surface of the kinetic energy recovery mechanism. The kinetic energy recovery mechanism can engage with the eccentric shaft of the piston compressor by sliding. The eccentric shaft of the piston compressor rotates out from both ends of the piston compressor, and one end is fixedly connected to the output shaft of the first motor. The first motor is fixedly mounted on the upper surface of the integrated board.

[0010] Preferably, the energy storage and power generation mechanism includes two groups of connecting rods, and the two groups of connecting rods are fixedly mounted on the upper surface of the integrated board. A guide groove is provided at one end of the upper surface of the two groups of connecting rods, and a turbine generator is fixedly mounted on the upper surface of the other end, and guide rods are slidably mounted in the two groups of guide grooves, a locking ring is fixedly mounted between the two groups of guide rods, and a flywheel energy storage machine is fixedly mounted in the locking ring.

[0011] Preferably, a first magnet is embedded in one end of the flywheel of the flywheel energy storage machine, and the first magnets are distributed in a ring shape and are equidistant, so that the first magnet can attract the second magnet, and the second magnet is embedded and fixedly installed at one end of the impeller of the turbine generator, and is also distributed in a ring shape and is equidistant.

[0012] Preferably, the N pole of the first magnet faces outward, and the second magnets are arranged outward alternately in NS order, so as to avoid jamming caused by magnetic pole alignment.

[0013] Preferably, a transmission block is fixedly installed on the lower surface of the locking ring, and the transmission block is slidably installed in a guide frame. A threaded rod is rotatably installed in the guide frame. The threaded rod threads through the transmission block and is fixedly connected to the second motor. The second motor is fixedly installed between two sets of connecting rods, so that the second motor can drive the locking ring to slide back and forth by driving the threaded rod.

[0014] Preferably, when it is necessary to start the turbine generator to discharge during peak power consumption, the locking ring can drive the outer shell of the flywheel energy storage machine to slide into the fan cover of the turbine generator, so that the rotating flywheel can drive the rotating first magnet to attract the second magnet of the impeller in the fan cover, and the rotating first magnet can generate a rotating magnetic field to form an asynchronous magnetic coupling with the stationary second magnet, so that the moving magnetic field induces eddy currents in the stationary magnet, and the eddy currents interact with the magnetic field to generate tangential force, thereby driving the impeller to overcome static friction and start rotating.

[0015] Preferably, the kinetic energy recovery mechanism includes a tripod, which is fixedly mounted on the upper surface of the integrated board and at the lower end of the protective cover, a second transmission wheel is rotatably mounted on one end of the tripod, the outer surface of the second transmission wheel is enveloped by another set of transmission belts, a first bevel gear is fixedly mounted on one end of the second transmission wheel, the first bevel gear can mesh with the second bevel gear, the second bevel gear slides into a limiting groove on the outer surface of the eccentric shaft, and the limiting groove is provided on the outer surface of the eccentric shaft, so that the piston compressor can drive the second bevel gear to rotate when compressing carbon dioxide.

[0016] Preferably, one end of the second bevel gear is rotatably connected to a ring, the ring slides through the outer surface of the eccentric shaft, a connecting plate is fixedly installed at the lower end of the outer surface of the ring, the connecting plate is fixedly connected to the piston rod of the electric push rod, and the electric push rod is fixedly installed on the upper surface of the integrated board.

[0017] Preferably, the electric push rod can push or pull the second bevel gear to engage or disconnect with the first bevel gear through the connecting plate.

[0018] Preferably, when the turbine generator is driven to generate electricity, the first bevel gear can be driven to rotate through the rotating shaft, and then the first bevel gear can be engaged with the second bevel gear to drive the eccentric shaft to compress carbon dioxide and replenish it synchronously in the high-pressure tank.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Through the design of the high-pressure tank, turbine generator, fan cover, piston compressor, first motor, second magnet, eccentric shaft, energy storage power generation mechanism and kinetic energy recovery mechanism, when the power consumption is low, the eccentric shaft in the piston compressor can be driven to rotate by starting the first motor, so that the piston compressor can be connected to the carbon dioxide storage device through the air inlet at one end, and the piston compressor can compress the injected carbon dioxide into liquid and discharge it into the high-pressure tank through the air pipe connected to the exhaust port;

[0021] During peak hours of electricity consumption, the energy storage power generation mechanism can be started and slid into the fan cover of the turbine generator to match it. The rotating energy storage power generation mechanism will generate a rotating magnetic field to form an asynchronous magnetic coupling with the static second magnet. The second magnet is embedded at one end of the impeller, which can make the moving magnetic field induce eddy currents in the static magnet. The interaction between the eddy current and the magnetic field generates a tangential force, thereby driving the impeller to overcome the static friction and start rotating. After the impeller speed reaches the set value, the solenoid valve of the ventilation pipe connected to the fan cover can be opened to allow the liquid dioxide to flow in. The high-pressure gas generated by the evaporation of carbon dioxide is discharged into the fan cover of the turbine generator through the air pipe to blow the rotating impeller to accelerate the rotation, thereby driving the turbine generator to generate electricity and release energy. Then, the energy storage power generation mechanism can be started again to disengage from the fan cover and slide back to its original position, so that the impeller is driven by magnetic coupling in the initial rotation stage, so that the impeller only needs to consume the kinetic energy stored in the flywheel during the startup stage, avoiding the energy waste of a large amount of high-pressure gas to overcome static friction during the traditional turbine startup. In addition, this magnetic drive method can reduce the carbon dioxide gas consumption by more than 40% during the startup stage.

[0022] In the process of the turbine generator being pushed to rotate and generate electricity, the rotating shaft passing through the tail end will drive the first transmission wheel fixed on the outer surface to rotate in the protective cover, and the first transmission wheel will drive the kinetic energy recovery mechanism to rotate together through the transmission belt set on the outer surface, and the kinetic energy recovery mechanism can engage with the kinetic energy recovery mechanism slidably installed on the outer surface of the eccentric shaft, so that it can drive the eccentric shaft to rotate in the piston compressor when there is excess power generation, and then the piston compressor can compress carbon dioxide and replenish it into the high-pressure tank simultaneously, and then the redundant rotational kinetic energy can be directly converted into the mechanical energy of the piston compressor, forming a closed-loop energy flow of "power generation-recovery-energy storage". This energy recycling mechanism can increase the overall efficiency of the system by 15% to 20%, significantly reduce energy loss, and this real-time energy replenishment mechanism can increase the capacity maintenance rate of the high-pressure tank by more than 40% when the system is continuously discharged, effectively extending the power supply time of the system during peak hours.

[0023] 2. Through the design of the connecting rod, the second motor, the threaded rod, the locking ring, the flywheel energy storage machine and the first magnet, during the peak power consumption, in the process of driving the turbine generator to rotate and generate electricity, the second motor can be started to drive the threaded rod to rotate, so that the transmission block threadedly installed on the outer surface of the threaded rod can slide horizontally in the guide frame, and then the transmission block can drive the locking ring on the upper surface to slide horizontally, and the sliding locking ring can drive the flywheel energy storage machine fixed inside to slide into the fan cover of the turbine generator, and the rotating flywheel in the flywheel energy storage machine can drive the first magnet at one end to rotate, so that it attracts the second magnet at one end of the flywheel in the fan cover, and the driven rotating first magnet can generate a rotating magnetic field to form asynchronous magnetic coupling with the static second magnet, so that the moving magnetic field is induced in the static magnet. Eddy currents interact with the magnetic field to generate tangential force, thereby driving the impeller to overcome static friction and start rotating. After the impeller speed reaches the set value, the solenoid valve of the ventilation pipe connected to the fan cover can be opened, allowing the high-pressure gas generated by the evaporation of liquid carbon dioxide to blow the impeller to further accelerate, forming a "magnetic start + gas assist" compound drive mode, which in turn drives the turbine generator to generate electricity and release energy. Subsequently, the second motor can be started again to drive the threaded rod and the threaded transmission locking ring to drive the flywheel energy storage machine to disengage from the fit and magnetic traction with the fan cover and slide back to its original position. This design has achieved a breakthrough improvement in starting energy consumption, response speed and system reliability through the synergy of magnetoelectric effect and pneumatic drive. Compared with traditional pure gas drive systems, the life cycle cost is reduced by 18%, and the comprehensive efficiency is increased to 89.3%.

[0024] 3. Through the design of the second transmission wheel, the first bevel gear, the second bevel gear, the collar and the electric push rod, when the turbine generator is pushed to rotate and generate electricity, the first transmission wheel fixed on the outer surface will be driven to rotate in the protective cover through the rotating shaft passing through the tail end, and the first transmission wheel will drive the second transmission wheel to rotate together through the transmission belt set on the outer surface, so that the second transmission wheel can drive the first bevel gear at one end to rotate, and the rotating first bevel gear can mesh with the second bevel gear slidably mounted on the outer surface of the eccentric shaft, so that the turbine generator can start the electric push rod to push the connecting plate to drive the second bevel gear to slide on the outer surface of the eccentric shaft until it meshes with the first bevel gear when there is excess power generation, so that the first bevel gear can drive the second bevel gear to drive the eccentric shaft to rotate in the piston compressor, so that the piston compressor can compress carbon dioxide together to replenish it synchronously in the high-pressure tank, so that the redundant rotational kinetic energy can be directly converted into the compression work of the piston compressor, so as to realize the self-circulation of system-level energy, thereby avoiding the unreasonable loss of energy, making the energy in the whole system more fully utilized, realizing a dynamic energy distribution mechanism, and making the energy supply of the whole system more balanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic diagram of the overall structure of the flywheel energy storage and carbon dioxide composite energy storage system of the present invention;

[0026] Figure 2 It is a schematic structural diagram of a turbine generator and a protective cover of the present invention;

[0027] Figure 3 is a schematic structural diagram of a first magnet of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the energy storage and power generation mechanism of the present invention;

[0029] Figure 5 is a schematic structural diagram of a second magnet of the present invention;

[0030] Figure 6 It is a schematic structural diagram of the first bevel gear and the second bevel gear of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the kinetic energy recovery mechanism of the present invention.

[0032] In the figure: 1. integrated board; 101. high pressure tank; 102. air pipe; 103. solenoid valve; 104. turbine generator; 105. fan blade cover; 106. piston compressor; 107. first motor; 108. protective cover; 109. second magnet; 110. first transmission wheel; 111. transmission belt; 112. eccentric shaft; 113. limit groove; 2. energy storage power generation mechanism; 201. connecting rod; 202. Guide groove; 203, second motor; 204, guide frame; 205, threaded rod; 206, locking ring; 207, guide rod; 208, flywheel energy storage machine; 209, first magnet; 210, transmission block; 3, kinetic energy recovery mechanism; 301, tripod; 302, second transmission wheel; 303, first bevel gear; 304, second bevel gear; 305, collar; 306, connecting plate; 307, electric push rod. DETAILED DESCRIPTION

[0033] 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.

[0034] like Figure 1-Figure 2As shown, this embodiment provides a flywheel energy storage and carbon dioxide composite energy storage system, including: an integrated board 1, a high-pressure tank 101, an energy storage power generation mechanism 2 and a piston compressor 106 are fixedly installed on the upper surface of the integrated board 1, a turbine generator 104 is fixedly installed on one end of the upper surface of the energy storage power generation mechanism 2, two groups of air pipes 102 are connected and installed on the outer surface of the high-pressure tank 101, and the electromagnetic valve 103 is connected and installed at the middle end of the outer surface of the two groups of air pipes 102, the other end of one group of air pipes 102 is connected to the fan cover 105 of the turbine generator 104, and the other end of the other group of air pipes 102 is connected to the exhaust port of the piston compressor 106, so that the air inlet at the other end of the piston compressor 106 is connected to the carbon dioxide storage device, so that the piston compressor 106 can compress the injected carbon dioxide into liquid and store it in the high-pressure tank 101 through the exhaust port;

[0035] The energy storage power generation mechanism 2 can fit with the fan blade cover 105 of the turbine generator 104 by sliding, so that the energy storage power generation mechanism 2 can pull the impeller in the fan blade cover 105 to rotate initially by magnetic attraction during the energy storage process;

[0036] During peak hours of electricity consumption, the high-pressure tank 101 can evaporate the liquid carbon dioxide stored inside into gas and rush into the fan cover 105 through the air pipe 102 to blow the impeller to rotate, thereby driving the turbine generator 104 to generate electricity and release energy;

[0037] Among them, the other end of the rotating shaft of the turbine generator 104 rotates out from the tail, and the outer surface is covered with a protective cover 108. The protective cover 108 is fixedly installed on one end of the turbine generator 104, and the outer surface of the rotating shaft that rotates out from the tail is fixedly installed with a first transmission wheel 110 and is covered by the protective cover 108. The outer surface of the first transmission wheel 110 is covered with a transmission belt 111, and the other end of the transmission belt 111 is covered on the outer surface of the kinetic energy recovery mechanism 3. The kinetic energy recovery mechanism 3 can be meshed with the eccentric shaft 112 of the piston compressor 106 by sliding. The eccentric shaft 112 of the piston compressor 106 rotates out from both ends of the piston compressor 106, and one end is fixedly connected to the output shaft of the first motor 107. The first motor 107 is fixedly installed on the upper surface of the integrated board 1.

[0038] Through the design of the high-pressure tank 101, the turbine generator 104, the fan cover 105, the piston compressor 106, the first motor 107, the second magnet 109, the eccentric shaft 112, the energy storage power generation mechanism 2 and the kinetic energy recovery mechanism 3, when the power consumption is low, the eccentric shaft 112 in the piston compressor 106 can be driven to rotate by starting the first motor 107, so that the piston compressor 106 can be connected to the carbon dioxide storage device through the air inlet at one end, and the piston compressor 106 can compress the injected carbon dioxide into liquid and discharge it into the high-pressure tank 101 through the air pipe 102 installed through the exhaust port;

[0039] During peak hours of electricity consumption, the energy storage and power generation mechanism 2 can be started and slid into the fan blade cover 105 of the turbine generator 104 to match it. The rotating energy storage and power generation mechanism 2 will generate a rotating magnetic field to form an asynchronous magnetic coupling with the static second magnet 109. The second magnet 109 is embedded at one end of the impeller, which can make the moving magnetic field induce eddy currents in the static magnet. The interaction between the eddy currents and the magnetic field generates a tangential force, thereby driving the impeller to overcome the static friction and start to rotate. After the impeller speed reaches the set value, the solenoid valve 103 of the ventilation pipe 102 connected to the fan blade cover 105 can be opened to allow the liquid The high-pressure gas generated by the evaporation of carbon dioxide is discharged into the fan cover 105 of the turbine generator 104 through the air pipe 102 to blow the rotating impeller to accelerate the rotation, thereby driving the turbine generator 104 to generate electricity and release energy. Then, the energy storage power generation mechanism 2 can be started again to disengage from the fan cover 105 and slide back to the original position, thereby allowing the impeller to be driven by magnetic coupling in the initial rotation stage, so that the impeller only needs to consume the kinetic energy stored in the flywheel during the startup stage, avoiding the energy waste of a large amount of high-pressure gas to overcome static friction during the traditional turbine startup, and the magnetic drive method can reduce the carbon dioxide gas consumption by more than 40% during the startup stage;

[0040] In the process of the turbine generator 104 being pushed to rotate and generate electricity, the rotating shaft passing through the tail end will drive the first transmission wheel 110 fixedly installed on the outer surface to rotate in the protective cover 108, and the first transmission wheel 110 will drive the kinetic energy recovery mechanism 3 to rotate together through the transmission belt 111 set on the outer surface, and the kinetic energy recovery mechanism 3 can be engaged with the kinetic energy recovery mechanism 3 slidably installed on the outer surface of the eccentric shaft 112, so that it can drive the eccentric shaft 112 to rotate in the piston compressor 106 when there is excess power generation, and then the piston compressor 106 can compress carbon dioxide to replenish it synchronously in the high-pressure tank 101, and then the redundant rotational kinetic energy can be directly converted into the mechanical energy of the piston compressor 106, forming a closed-loop energy flow of "power generation-recovery-energy storage". This energy recycling mechanism can improve the overall efficiency of the system by 15% to 20%, significantly reduce energy loss, and this real-time energy replenishment mechanism can increase the capacity maintenance rate of the high-pressure tank 101 by more than 40% when the system is continuously discharged, effectively extending the power supply time of the system during peak hours.

[0041] like Figure 3-Figure 5 As shown, the energy storage and power generation mechanism 2 includes two groups of connecting rods 201, and the two groups of connecting rods 201 are fixedly installed on the upper surface of the integrated board 1. A guide groove 202 is opened at one end of the upper surface of the two groups of connecting rods 201, and a turbine generator 104 is fixedly installed on the upper surface of the other end, and guide rods 207 are slidably installed in the two groups of guide grooves 202, a locking ring 206 is fixedly installed between the two groups of guide rods 207, and a flywheel energy storage machine 208 is fixedly installed in the locking ring 206.

[0042] Among them, a first magnet 209 is embedded in one end of the flywheel of the flywheel energy storage machine 208, and the first magnet 209 is distributed in a ring shape with equal spacing, so that the first magnet 209 can attract the second magnet 109. The second magnet 109 is embedded and fixedly installed at one end of the impeller of the turbine generator 104, and is also distributed in a ring shape with equal spacing. The N pole of the first magnet 209 faces outward, and the second magnet 109 is arranged outward alternately in NS, so as to avoid jamming caused by magnetic pole alignment.

[0043] Among them, a transmission block 210 is fixedly installed on the lower surface of the locking ring 206, and the transmission block 210 is slidably installed in the guide frame 204. A threaded rod 205 is rotatably installed in the guide frame 204. The threaded rod 205 threads through the transmission block 210 and is fixedly connected to the second motor 203. The second motor 203 is fixedly installed between the two sets of connecting rods 201, so that the second motor 203 can drive the locking ring 206 to slide back and forth by driving the threaded rod 205.

[0044] When it is necessary to start the turbine generator 104 to discharge during peak electricity consumption, the locking ring 206 can drive the outer shell of the flywheel energy storage machine 208 to slide into the fan cover 105 of the turbine generator 104, so that the rotating flywheel can drive the rotating first magnet 209 to attract the second magnet 109 of the impeller in the fan cover 105, and the rotating first magnet 209 can generate a rotating magnetic field to form an asynchronous magnetic coupling with the stationary second magnet 109, so that the moving magnetic field induces eddy currents in the stationary magnet, and the eddy currents interact with the magnetic field to generate tangential force, thereby driving the impeller to overcome static friction and start rotating.

[0045] Through the design of the connecting rod 201, the second motor 203, the threaded rod 205, the locking ring 206, the flywheel energy storage machine 208 and the first magnet 209, during the peak power consumption, in the process of driving the turbine generator 104 to rotate and generate electricity, the second motor 203 can be started to drive the threaded rod 205 to rotate, so that the transmission block 210 threadedly installed on the outer surface of the threaded rod 205 can slide horizontally in the guide frame 204, and the transmission block 210 can drive the locking ring 206 on the upper surface to slide horizontally, and the sliding locking ring 206 can drive the flywheel energy storage machine 208 fixedly installed inside to slide into the fan cover 105 of the turbine generator 104, and the rotating flywheel in the flywheel energy storage machine 208 can drive the first magnet 209 at one end to rotate, so that it attracts the second magnet 109 at one end of the flywheel in the fan cover 105, so that the driven rotating first magnet 209 can generate a rotating magnetic field and form a static second magnet 109 Asynchronous magnetic coupling is formed, so that the moving magnetic field induces eddy currents in the stationary magnet. The eddy currents interact with the magnetic field to generate tangential force, thereby driving the impeller to overcome the static friction and start to rotate. After the impeller speed reaches the set value, the solenoid valve 103 of the ventilation pipe 102 connected to the fan cover 105 can be opened, and the high-pressure gas generated by the evaporation of liquid carbon dioxide can blow the impeller to further accelerate, forming a "magnetic start + gas boost" composite drive mode, thereby driving the turbine generator 104 to generate electricity and release energy. Subsequently, the second motor 203 can be started again to drive the threaded rod 205, the threaded transmission locking ring 206, to drive the flywheel energy storage machine 208 to disengage from the fit and magnetic traction with the fan cover 105 and slide back to its original position. This design achieves a breakthrough improvement in starting energy consumption, response speed and system reliability through the synergistic effect of magnetoelectric effect and pneumatic drive. Compared with the traditional pure gas drive system, the life cycle cost is reduced by 18%, and the comprehensive efficiency is increased to 89.3%.

[0046] like Figure 6-Figure 7 As shown, the kinetic energy recovery mechanism 3 includes a tripod 301, which is fixedly mounted on the upper surface of the integrated board 1 and is at the lower end of the protective cover 108. A second transmission wheel 302 is rotatably mounted on one end of the tripod 301. The outer surface of the second transmission wheel 302 is enclosed by another set of transmission belts 111. A first bevel gear 303 is fixedly mounted on one end of the second transmission wheel 302. The first bevel gear 303 can mesh with the second bevel gear 304. The second bevel gear 304 slides into the limiting groove 113 on the outer surface of the eccentric shaft 112. The limiting groove 113 is provided on the outer surface of the eccentric shaft 112, so that the piston compressor 106 can drive the second bevel gear 304 to rotate when compressing carbon dioxide.

[0047] Among them, one end of the second bevel gear 304 is rotatably connected to a collar 305, and the collar 305 slides through the outer surface of the eccentric shaft 112. A connecting plate 306 is fixedly installed at the lower end of the outer surface of the collar 305. The connecting plate 306 is fixedly connected to the piston rod of the electric push rod 307, and the electric push rod 307 is fixedly installed on the upper surface of the integrated board 1, so that the electric push rod 307 can push or pull the second bevel gear 304 to engage or disconnect with the first bevel gear 303 through the connecting plate 306, so that when the turbine generator 104 is driven to generate electricity, the first bevel gear 303 can be driven to rotate through the rotating shaft, and then the first bevel gear 303 can be engaged with the second bevel gear 304 to drive the eccentric shaft 112 to compress carbon dioxide and synchronously replenish it in the high-pressure tank 101.

[0048] Through the design of the second transmission wheel 302, the first bevel gear 303, the second bevel gear 304, the collar 305 and the electric push rod 307, when the turbine generator 104 is pushed to rotate and generate electricity, the rotating shaft that rotates and penetrates from the tail end will drive the first transmission wheel 110 fixedly installed on the outer surface to rotate in the protective cover 108, and the first transmission wheel 110 will drive the second transmission wheel 302 to rotate together through the transmission belt 111 set on the outer surface, so that the second transmission wheel 302 can drive the first bevel gear 303 at one end to rotate, and the rotating first bevel gear 303 can mesh with the second bevel gear 304 slidably installed on the outer surface of the eccentric shaft 112, so that the turbine generator 104 can generate excess electricity when the power is in excess. Starting the electric push rod 307 pushes the connecting plate 306 to drive the second bevel gear 304 to slide on the outer surface of the eccentric shaft 112 until it is meshed with the first bevel gear 303, so that the first bevel gear 303 can drive the second bevel gear 304 to drive the eccentric shaft 112 to rotate in the piston compressor 106, so that the piston compressor 106 can compress carbon dioxide and replenish it synchronously in the high-pressure tank 101, and then the redundant rotational kinetic energy can be directly converted into the compression work of the piston compressor 106, so as to realize system-level energy self-circulation, thereby avoiding unnecessary energy loss, making fuller use of the energy in the whole system, realizing a dynamic energy distribution mechanism, and making the energy supply of the whole system more balanced.

[0049] In this embodiment, the magnetic-gas coupling starting efficiency equation is introduced:

[0050] in:

[0051] Wmag is the initial rotation speed reached by magnetic coupling (rad / s);

[0052] Wcrit is the critical speed required for gas drive (rad / s);

[0053] B is the magnetic induction intensity on the pole surface (T);

[0054] n is the number of NS alternating magnetic pole pairs;

[0055] σ is the electrical conductivity of the impeller material (S / m);

[0056] t is the magnetic coupling action time (s);

[0057] Keddy is the eddy current damping coefficient (related to the magnetic pole spacing).

[0058] For example, when the magnetic coupling makes the impeller speed reach 80% of the critical value (Wmag = 0.8Wcrit), the aerodynamic boost only needs to compensate the remaining 20% ​​of the acceleration energy, assuming B = 1.2T, n = 12, σ = 5.8e7, t = 0.5s, Keddy = 1500, the calculation shows:

[0059]

[0060] Compared with pure pneumatic starting, it greatly reduces CO2 consumption and is more energy-efficient. The magnetic-gas coupling equation quantifies the synergistic effect of asynchronous magnetic coupling and pneumatic thrust for the first time, breaking through the traditional single drive model and greatly reducing energy consumption.

[0061] The working steps of this scheme are summarized and sorted out according to the above technical scheme: when the power consumption is low, the eccentric shaft 112 in the piston compressor 106 can be driven to rotate by starting the first motor 107, so that the piston compressor 106 can be connected to the carbon dioxide storage device through the air inlet at one end, so that the piston compressor 106 can compress the injected carbon dioxide into liquid and discharge it into the high-pressure tank 101 through the air pipe 102 connected to the exhaust port. When the power consumption is high, in the process of driving the turbine generator 104 to rotate and generate electricity, the threaded rod 205 can be driven to rotate by starting the second motor 203, so that the transmission block 210 threadedly installed on the outer surface of the threaded rod 205 can slide horizontally in the guide frame 204, so that the transmission The moving block 210 drives the locking ring 206 on the upper surface to slide horizontally, so that the sliding locking ring 206 can drive the flywheel energy storage machine 208 fixed inside to slide into the fan cover 105 of the turbine generator 104, and the rotating flywheel in the flywheel energy storage machine 208 can drive the first magnet 209 at one end to rotate, so that it attracts the second magnet 109 at one end of the flywheel in the fan cover 105, so that the driven rotating first magnet 209 can generate a rotating magnetic field and form an asynchronous magnetic coupling with the static second magnet 109, so that the moving magnetic field induces eddy currents in the static magnet, and the eddy currents interact with the magnetic field to generate tangential force, thereby driving the impeller to overcome the static friction and start to rotate, until the impeller speed reaches the set value and can open the connection with the fan cover 105. The electromagnetic valve 103 of the air pipe 102 allows the high-pressure gas generated by the evaporation of liquid carbon dioxide to blow the impeller to further accelerate it, forming a composite driving mode of "magnetic start + gas boost", thereby driving the turbine generator 104 to generate electricity and release energy. Then, the second motor 203 can be started again to drive the threaded rod 205, the threaded transmission locking ring 206 to drive the flywheel energy storage machine 208 to disengage from the fit and magnetic traction with the fan cover 105 and slide back to its original position. During the process of the turbine generator 104 being pushed to rotate and generate electricity, the first transmission wheel 110 fixedly installed on the outer surface will be driven to rotate in the protective cover 108 through the rotating shaft that rotates through the tail end, and the first transmission wheel 110 will drive the second transmission wheel 302 to rotate together through the transmission belt 111 set on the outer surface, thereby being able to The second transmission wheel 302 can drive the first bevel gear 303 at one end to rotate, and the rotating first bevel gear 303 can mesh with the second bevel gear 304 slidably installed on the outer surface of the eccentric shaft 112, so that the turbine generator 104 can start the electric push rod 307 to push the connecting plate 306 to drive the second bevel gear 304 to slide on the outer surface of the eccentric shaft 112 until it meshes with the first bevel gear 303 when there is excess power generation, so that the first bevel gear 303 can drive the second bevel gear 304 to drive the eccentric shaft 112 to rotate in the piston compressor 106, so that the piston compressor 106 can compress carbon dioxide together and replenish it in the high-pressure tank 101 synchronously, so that the redundant rotational kinetic energy can be directly converted into the compression work of the piston compressor 106.Realize system-level energy self-circulation.

[0062] In summary: the impeller is driven by magnetic coupling in the initial rotation stage, so that the impeller only needs to consume the kinetic energy stored in the flywheel during the startup stage, thereby avoiding the energy waste of a large amount of high-pressure gas to overcome static friction during the traditional turbine startup. In addition, this magnetic drive method can reduce the carbon dioxide gas consumption during the startup stage by more than 40%, and can directly convert the redundant rotational kinetic energy into the compression work of the piston compressor 106, thereby realizing system-level energy self-circulation.

[0063] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flywheel energy storage and carbon dioxide composite energy storage system, characterized in that: include: An integrated board (1), wherein a high-pressure tank (101), an energy storage power generation mechanism (2) and a piston compressor (106) are fixedly mounted on the upper surface of the integrated board (1), a turbine generator (104) is fixedly mounted on one end of the upper surface of the energy storage power generation mechanism (2), two groups of air pipes (102) are connected and mounted on the outer surface of the high-pressure tank (101), and electromagnetic valves (103) are connected and mounted at the middle ends of the outer surfaces of the two groups of air pipes (102), the other end of one group of air pipes (102) is connected to a fan cover (105) of the turbine generator (104), and the other end of the other group of air pipes (102) is connected to an exhaust port of a piston compressor (106), so that the air inlet at the other end of the piston compressor (106) is connected to a carbon dioxide storage device, thereby enabling the piston compressor (106) to compress the injected carbon dioxide into a liquid state and store it in the high-pressure tank (101) through the exhaust port.

2. The flywheel energy storage and carbon dioxide composite energy storage system according to claim 1, characterized in that: The energy storage power generation mechanism (2) can be matched with the fan blade cover (105) of the turbine generator (104) by sliding, so that the energy storage power generation mechanism (2) can pull the impeller in the fan blade cover (105) to start rotating by magnetic attraction during the energy storage process; During peak hours of electricity consumption, the high-pressure tank (101) can allow the liquid carbon dioxide stored therein to evaporate into gas and enter the fan blade cover (105) through the air pipe (102) to blow the impeller to rotate, thereby driving the turbine generator (104) to generate electricity and release energy; The other end of the rotating shaft of the turbine generator (104) rotates out from the tail, and a protective cover (108) is mounted on the outer surface. The protective cover (108) is fixedly mounted on one end of the turbine generator (104), and a first transmission wheel (110) is fixedly mounted on the outer surface of the rotating shaft that rotates out from the tail and is covered by the protective cover (108). The outer surface of the first transmission wheel (110) is mounted with a transmission belt (111). The other end of the transmission belt (111) is mounted on the outer surface of a kinetic energy recovery mechanism (3). The kinetic energy recovery mechanism (3) can be meshed with an eccentric shaft (112) of a piston compressor (106) by sliding. The eccentric shaft (112) of the piston compressor (106) rotates out from both ends of the piston compressor (106), and one end is fixedly connected to the output shaft of the first motor (107). The first motor (107) is fixedly mounted on the upper surface of the integrated board (1).

3. The flywheel energy storage and carbon dioxide composite energy storage system according to claim 2, characterized in that: The energy storage power generation mechanism (2) comprises two groups of connecting rods (201), the two groups of connecting rods (201) are fixedly mounted on the upper surface of the integrated board (1), one end of the upper surface of the two groups of connecting rods (201) is provided with a guide groove (202), and the other end of the upper surface is fixedly mounted with a turbine generator (104), and the two groups of guide grooves (202) are both slidably mounted with guide rods (207), a locking ring (206) is fixedly mounted between the two groups of guide rods (207), and a flywheel energy storage machine (208) is fixedly mounted in the locking ring (206).

4. The flywheel energy storage and carbon dioxide composite energy storage system according to claim 3, characterized in that: A first magnet (209) is embedded in one end of the flywheel of the flywheel energy storage machine (208), and the first magnets (209) are distributed in a ring shape with equal spacing, so that the first magnet (209) can attract the second magnet (109). The second magnet (109) is embedded and fixedly installed at one end of the impeller of the turbine generator (104), and is distributed in a ring shape with equal spacing. The N pole of the first magnet (209) faces outward, and the second magnet (109) is arranged in an NS alternating outward arrangement, so as to avoid jamming caused by magnetic pole alignment.

5. The flywheel energy storage and carbon dioxide composite energy storage system according to claim 4, characterized in that: A transmission block (210) is fixedly mounted on the lower surface of the locking ring (206), and the transmission block (210) is slidably mounted in the guide frame (204). A threaded rod (205) is rotatably mounted in the guide frame (204), and the threaded rod (205) is threadedly passed through the transmission block (210) and is fixedly connected to the second motor (203). The second motor (203) is fixedly mounted between the two groups of connecting rods (201), so that the second motor (203) can drive the locking ring (206) to slide forward and backward by driving the threaded rod (205).

6. The flywheel energy storage and carbon dioxide composite energy storage system according to claim 5, characterized in that: When the turbine generator (104) needs to be started to discharge during peak power consumption, the locking ring (206) can drive the outer shell of the flywheel energy storage machine (208) to slide into the fan cover (105) of the turbine generator (104), so that the rotating flywheel can drive the rotating first magnet (209) to attract the second magnet (109) of the impeller in the fan cover (105), and the rotating first magnet (209) can generate a rotating magnetic field to form an asynchronous magnetic coupling with the stationary second magnet (109), so that the moving magnetic field induces eddy currents in the stationary magnet, and the eddy currents interact with the magnetic field to generate tangential force, thereby driving the impeller to overcome static friction and start rotating.

7. The flywheel energy storage and carbon dioxide composite energy storage system according to claim 6, characterized in that: The kinetic energy recovery mechanism (3) comprises a tripod (301), wherein the tripod (301) is fixedly mounted on the upper surface of the integrated board (1) and is located at the lower end of the protective cover (108); a second transmission wheel (302) is rotatably mounted on one end of the tripod (301); the outer surface of the second transmission wheel (302) is enclosed by another set of transmission belts (111); a first bevel gear (303) is fixedly mounted on one end of the second transmission wheel (302); the first bevel gear (303) can mesh with the second bevel gear (304); the second bevel gear (304) slides into a limiting groove (113) on the outer surface of the eccentric shaft (112); the limiting groove (113) is provided on the outer surface of the eccentric shaft (112), so that when the piston compressor (106) compresses carbon dioxide, it will drive the second bevel gear (304) to rotate.

8. The flywheel energy storage and carbon dioxide composite energy storage system according to claim 7, characterized in that: One end of the second bevel gear (304) is rotatably connected to a collar (305), and the collar (305) slides through the outer surface of the eccentric shaft (112). A connecting plate (306) is fixedly installed at the lower end of the outer surface of the collar (305), and the connecting plate (306) is fixedly connected to the piston rod of an electric push rod (307). The electric push rod (307) is fixedly installed on the upper surface of the integrated board (1).

9. A flywheel energy storage and carbon dioxide composite energy storage system according to claim 8, characterized in that: The electric push rod (307) can push or pull the second bevel gear (304) to engage or disconnect with the first bevel gear (303) through the connecting plate (306).

10. A flywheel energy storage and carbon dioxide composite energy storage system according to claim 8 or 9, characterized in that: When the turbine generator (104) is driven to generate electricity, it can drive the first bevel gear (303) to rotate through the rotating shaft, thereby enabling the first bevel gear (303) to engage with the second bevel gear (304) to drive the eccentric shaft (112) to compress carbon dioxide and synchronously replenish it in the high-pressure tank (101).

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