A rotor structure and control system of a flywheel energy storage system

Abstract

The utility model relates to the technical field of flywheel, and disclose a rotor structure and control system of flywheel energy storage system, solved the rotor of existing flywheel energy storage system when installing is very inconvenient, its installation procedure is numerous, and the energy storage control system is poor to the monitoring protection ability of rotor, cannot grasp the state of each item of rotor operation in real time, it includes vacuum storehouse, the rear fixed mounting of vacuum storehouse has vacuum pump, the inner bottom fixed mounting of vacuum storehouse has drive motor, the inner top fixed mounting of vacuum storehouse has axial magnetic suspension bearing, and the lower part of axial magnetic suspension bearing and the output of drive motor rotatory and fixed mounting have two transmission shafts respectively, and the surface of two transmission shafts all rotatory mounting has radial magnetic suspension bearing, this flywheel energy storage system installs the rotor very convenient, improved work efficiency, and the energy storage control system is strong to the monitoring protection ability of rotor, can grasp the state of each item of rotor operation in real time.

Description

Technical Field

[0001] This utility model belongs to the field of flywheel technology, specifically a rotor structure and control system for a flywheel energy storage system. Background Technology

[0002] The rotor structure of flywheel energy storage systems is typically made of high-strength composite materials (such as carbon fiber or glass fiber-epoxy resin), and its shape includes single-layer cylindrical, multi-layer cylindrical, and spindle-shaped. The design balances high rotational inertia and material strength to achieve high speed and high energy density. The support method often uses magnetic levitation bearings (such as superconducting magnetic levitation, electromagnetic levitation, or permanent magnet levitation) to reduce friction loss and improve system efficiency. Its application fields are wide, covering grid frequency regulation to maintain voltage frequency stability, rail transit braking energy recovery to save energy and reduce consumption, uninterruptible power supplies (UPS) to ensure the power supply continuity of critical facilities, and renewable energy grid connection to smooth output fluctuations. With its high power, fast response, and long life characteristics, it has become a typical representative of short-term high-frequency energy storage.

[0003] The installation of rotors in existing flywheel energy storage systems is very inconvenient. The rotor needs to be installed on the drive shaft, the drive shaft needs to be installed in the bearing for positioning, and then it needs to be fixed to the output end of the motor. The installation process is complicated. Furthermore, the existing flywheel energy storage control system has poor monitoring and protection capabilities for the rotor and cannot keep track of the rotor's operating status in real time, which can easily cause damage to the rotor. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a rotor structure and control system for a flywheel energy storage system, which effectively solves the problems of the inconvenience of rotor installation, the numerous installation procedures, and the poor monitoring and protection capabilities of the energy storage control system for the rotor, which cannot monitor the various operating states of the rotor in real time.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rotor structure for a flywheel energy storage system, including a vacuum chamber, a vacuum pump fixedly installed at the rear of the vacuum chamber, a drive motor fixedly installed at the bottom inner part of the vacuum chamber, an axial magnetic levitation bearing fixedly installed at the top inner part of the vacuum chamber, two transmission shafts rotatably and fixedly installed at the lower part of the axial magnetic levitation bearing and the output end of the drive motor, respectively, and radial magnetic levitation bearings are rotatably installed on the surfaces of the two transmission shafts. A rotor is detachably installed between the two transmission shafts through a connector, and the rotor can be driven to rotate through the transmission shaft located at the lower part when the drive motor is running.

[0006] Preferably, the connector includes mating grooves formed at the ends of the two drive shafts that are close to each other, and mating blocks are fixedly installed on the upper and lower sides of the two rotors, with the two mating blocks inserted into the two mating grooves.

[0007] Preferably, both drive shafts have mounting grooves on their surfaces, and one side of each mounting groove has a strip groove. A baffle is provided at the lower part of the mounting groove. Each mating block has an insertion hole in its center, and the two baffles have insertion openings in their centers. Threaded holes are provided on one side of the inner wall of each mating groove. Bolts are inserted between adjacent insertion openings and holes, and one end of each bolt is threaded into the two threaded holes.

[0008] Preferably, each of the strip grooves is fixedly installed with a sliding rod, and each end of the sliding rod is fitted with a sliding sleeve. One side of each sliding sleeve is fixedly connected to two baffles, and each of the two sliding rods is fitted with a spring. Both ends of each spring are fixedly connected to the inside of the strip groove and the sliding sleeve, respectively.

[0009] Preferably, sliders are fixedly installed on both sides of the two baffles, and sliding grooves are opened on the inner walls of both sides of the two mounting slots, with the four sliders slidably installed inside the four sliding grooves.

[0010] A rotor control system for a flywheel energy storage system includes a PLC logic controller. A speed sensor, a temperature sensor, and a vibration sensor are integrated within the vacuum chamber. The outputs of the speed sensor, temperature sensor, and vibration sensor are connected to the inputs of the PLC logic controller. The outputs of the PLC logic controller are electrically connected to the inputs of a bearing controller, a vacuum chamber controller, and a motor driver. The output of the bearing controller is electrically connected to the inputs of an axial magnetic levitation bearing and two radial magnetic levitation bearings. The output of the motor driver is electrically connected to the input of a drive motor. The output of the vacuum chamber controller is electrically connected to the input of a vacuum pump. The inputs of both the motor driver and the bearing controller are electrically connected to the output of a protection module.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: During installation, the operator simultaneously pushes the two baffles to move in opposite directions. When the baffles move, they both drive the slider to slide in the groove, increasing the stability of the movement of the two baffles. At the same time, when the two baffles move, they both drive the sliding sleeve to slide on the surface of the sliding rod and simultaneously compress the spring, thereby further ensuring the stability of the baffle movement while giving it the ability to elastically reset. Then, the operator inserts the two docking blocks on the rotor into the docking slots on the two drive shafts, and then releases the two baffles. Under the elastic force of the two springs, the two baffles are pushed to move and reset, covering the two docking blocks. Finally, the operator passes the bolt through the socket and the hole, and screws one end of the bolt into the threaded hole, thereby quickly achieving the fixed installation of the rotor.

[0012] The PLC logic controller, speed sensor, temperature sensor, vibration sensor, bearing controller, vacuum chamber controller, and motor driver can monitor the rotor's operating status in real time, thereby effectively protecting the rotor. This makes the installation of the rotor in this flywheel energy storage system very convenient, improves work efficiency, and the energy storage control system has strong monitoring and protection capabilities for the rotor, enabling it to grasp the various operating states of the rotor in real time. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0014] In the attached diagram:

[0015] Figure 1 This is a schematic diagram of the rotor structure of the flywheel energy storage system of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the vacuum chamber of this utility model;

[0017] Figure 3 This is a schematic diagram of the slider and groove structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the docking block and socket structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the threaded hole structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the baffle structure of this utility model;

[0021] Figure 7 This is a block diagram illustrating the electrical structure principle of the flywheel energy storage control system of this utility model;

[0022] In the diagram: 1. Vacuum chamber; 2. Drive motor; 3. Axial magnetic levitation bearing; 4. Drive shaft; 5. Radial magnetic levitation bearing; 6. Rotor; 7. Connecting groove; 8. Mounting groove; 9. Connecting block; 10. Insertion hole; 11. Threaded hole; 12. Insertion port; 13. Bolt; 14. Baffle; 15. Slider; 16. Slide groove; 17. Strip groove; 18. Slide rod; 19. Slide sleeve; 20. Spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] Depend on Figures 1 to 7 The present invention discloses a rotor structure for a flywheel energy storage system, comprising a vacuum chamber 1, a vacuum pump fixedly installed at the rear of the vacuum chamber 1, which can discharge the air in the vacuum chamber to form a vacuum state, a drive motor 2 for outputting rotational power fixedly installed at the inner bottom of the vacuum chamber 1, an axial magnetic levitation bearing 3 fixedly installed at the inner top of the vacuum chamber 1, two transmission shafts 4 rotatably and fixedly installed at the lower part of the axial magnetic levitation bearing 3 and the output end of the drive motor 2, respectively. The axial magnetic levitation bearing 3 can ensure the stability of the rotation of the upper end of the transmission shaft 4, and radial magnetic levitation bearings 5 ​​are rotatably installed on the surface of both transmission shafts 4, which can ensure the stability of the rotation of the two transmission shafts 4. A rotor 6 is detachably installed between the two transmission shafts 4 through a connector to facilitate the installation of the rotor 6. When the drive motor 2 is running, it can drive the rotor 6 to rotate through the transmission shaft 4 located at the lower part.

[0025] During installation, the operator controls the connectors to quickly install the rotor 6; and through the energy storage control system, the operating status of the rotor 6 can be monitored, and the drive motor 2, vacuum pump, axial magnetic levitation bearing 3 and two radial magnetic levitation bearings 5 ​​can be adjusted to achieve operation control; making the installation of the rotor of this flywheel energy storage system very convenient, improving work efficiency, and the energy storage control system has strong monitoring and protection capabilities for the rotor, and can monitor the various operating statuses of the rotor 6 in real time.

[0026] The connector includes mating grooves 7 formed at the ends of the two drive shafts 4 close to each other, and mating blocks 9 are fixedly installed on the upper and lower sides of the two rotors 6. The two mating blocks 9 are adapted to the two mating grooves 7 and are inserted into the two mating grooves 7. The surfaces of the two drive shafts 4 are provided with mounting grooves 8. One side of the mounting groove 8 is provided with a strip groove 17. The lower part of the mounting groove 8 is provided with a baffle 14, which can cover the mating blocks 9. The middle of the mating blocks 9 is provided with a insertion hole 10, and the middle of the two baffles 14 is provided with an insertion port 12. The size and shape of the insertion port 12 are adapted to the insertion hole 10. The inner wall of one side of the two mating grooves 7 is provided with a threaded hole 11. Bolts 13 are inserted between adjacent insertion ports 12 and insertion holes 10, and one end of the two bolts 13 is threaded into the inside of the two threaded holes 11 to lock the threads and fix the two mating blocks 9 on the rotors 6.

[0027] During installation, the operator simultaneously pushes the two baffles 14 to move in opposite directions. Then, the operator inserts the two mating blocks 9 on the rotor 6 into the mating grooves 7 on the two drive shafts 4. Immediately afterward, the operator releases the two baffles 14, which are then pushed to move and reset under the elastic force of the two springs 20, covering the two mating blocks 9. Finally, the operator passes the bolt 13 through the socket 12 and the insertion hole 10, and threads one end of the bolt into the threaded hole 11, thereby quickly fixing and installing the rotor.

[0028] Slide rods 18 are fixedly installed inside the strip groove 17. Slide sleeves 19 are fitted on the ends of the surfaces of the slide rods 18. One side of each slide sleeve 19 is fixedly connected to two baffles 14, so that the two slide sleeves 19 can slide on the surfaces of the two slide rods 18 to limit the movement trajectory of the two baffles 14. Springs 20 are fitted on the surfaces of the two slide rods 18. The two ends of each spring 20 are fixedly connected to the inside of the strip groove 17 and the slide sleeves 19, respectively. When the two springs 20 are compressed and release elastic potential energy, they can push the baffles 9 to move and block the docking block 9.

[0029] When the two baffles 14 move, they both drive the sliding sleeves 19 to slide on the surface of the sliding rod 18, and simultaneously compress the spring 20, thereby further ensuring the stability of the movement of the baffles 14 while giving it the ability to elastically return to its original position.

[0030] Slider 15 is fixedly installed on both sides of the two baffles 14, and sliding grooves 16 are opened on both sides of the inner wall of the two mounting grooves 8. The four sliders 15 are slidably installed inside the four sliding grooves 16, so that the four sliders 15 can move within the four sliding grooves 16, thereby limiting the movement trajectory of the two baffles 14.

[0031] When the baffle 14 moves, it drives the slider 15 to slide within the groove 16, which increases the stability of the movement of the two baffles 14.

[0032] A rotor control system for a flywheel energy storage system includes a PLC logic controller. The PLC is equipped with a programmable control system for intelligent control of electrical equipment. The vacuum chamber 1 integrates speed sensors, temperature sensors, and vibration sensors to monitor rotor speed, temperature, and vibration levels, preventing malfunctions. The outputs of the speed, temperature, and vibration sensors are connected to the inputs of the PLC logic controller to receive and analyze various monitoring data. The outputs of the PLC logic controller are electrically connected to the inputs of a bearing controller, a vacuum chamber controller, and a motor driver, thereby controlling these components. The output of the bearing controller is electrically connected to the input of the axial magnetic levitation bearing 3 and the two radial magnetic levitation bearings 5, thereby regulating the electromagnetic force of the axial magnetic levitation bearing 3 and the two radial magnetic levitation bearings 5 ​​to keep the rotor 6 stably suspended. The output of the motor driver is electrically connected to the input of the drive motor 2. According to the instructions of the motor driver, the drive motor 2 operates as a motor charging or generator discharging. The output of the vacuum chamber controller is electrically connected to the input of the vacuum pump to control the vacuum pump to maintain the vacuum environment, reduce wind resistance loss, and monitor the vacuum level. The inputs of the motor driver and the bearing controller are both electrically connected to the output of the protection module to monitor system abnormalities such as overspeed and overheating, and trigger emergency shutdown or protection mechanisms.

Claims

1. A rotor structure for a flywheel energy storage system, comprising a vacuum chamber (1), characterized in that: A vacuum pump is fixedly installed at the rear of the vacuum chamber (1), a drive motor (2) is fixedly installed at the bottom of the vacuum chamber (1), and an axial magnetic levitation bearing (3) is fixedly installed at the top of the vacuum chamber (1). Two transmission shafts (4) are rotatably and fixedly installed at the lower part of the axial magnetic levitation bearing (3) and the output end of the drive motor (2), and radial magnetic levitation bearings (5) are rotatably installed on the surface of both transmission shafts (4). A rotor (6) is detachably installed between the two transmission shafts (4) through a connector. When the drive motor (2) is running, it can drive the rotor (6) to rotate through the transmission shaft (4) located at the lower part.

2. The rotor structure of a flywheel energy storage system according to claim 1, characterized in that: The connector includes a docking groove (7) opened at one end of the two drive shafts (4) close to each other, and docking blocks (9) are fixedly installed on the upper and lower sides of the two rotors (6), and the two docking blocks (9) are inserted into the two docking grooves (7).

3. The rotor structure of a flywheel energy storage system according to claim 2, characterized in that: The surfaces of the two drive shafts (4) are provided with mounting grooves (8), and one side of the mounting groove (8) is provided with a strip groove (17). The lower part of the mounting groove (8) is provided with a baffle (14). The middle part of the docking block (9) is provided with a socket (10), and the middle part of the two baffles (14) is provided with a socket (12). The inner wall of one side of the two docking grooves (7) is provided with a threaded hole (11). A bolt (13) is inserted between the adjacent socket (12) and the socket (10), and one end of the two bolts (13) is threaded into the inside of the two threaded holes (11).

4. The rotor structure of a flywheel energy storage system according to claim 3, characterized in that: The inside of each of the strip grooves (17) is fixedly installed with a sliding rod (18). The ends of the sliding rods (18) are fitted with sliding sleeves (19). One side of each of the two sliding sleeves (19) is fixedly connected to two baffles (14). The surfaces of each of the two sliding rods (18) are fitted with springs (20). The two ends of each of the two springs (20) are fixedly connected to the inside of the strip grooves (17) and the sliding sleeves (19).

5. The rotor structure of a flywheel energy storage system according to claim 3, characterized in that: Slider (15) is fixedly installed on both sides of the two baffles (14), and sliding grooves (16) are opened on both sides of the inner wall of the two mounting grooves (8). The four sliders (15) are slidably installed inside the four sliding grooves (16).

6. A control system for the rotor structure of the flywheel energy storage system according to any one of claims 1-5, characterized in that: The system includes a PLC logic controller, and the vacuum chamber (1) integrates a speed sensor, a temperature sensor, and a vibration sensor. The output terminals of the speed sensor, temperature sensor, and vibration sensor are connected to the input terminals of the PLC logic controller. The output terminals of the PLC logic controller are electrically connected to the input terminals of the bearing controller, the vacuum chamber controller, and the motor driver, respectively. The output terminal of the bearing controller is electrically connected to the input terminals of the axial magnetic levitation bearing (3) and the two radial magnetic levitation bearings (5). The output terminal of the motor driver is electrically connected to the input terminal of the drive motor (2). The output terminal of the vacuum chamber controller is electrically connected to the input terminal of the vacuum pump. The input terminals of the motor driver and the bearing controller are both electrically connected to the output terminals of the protection module.

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