Pneumatic auxiliary heat dissipation magnetic suspension flywheel energy storage method and system

Abstract

The invention discloses a pneumatic auxiliary heat dissipation magnetic suspension flywheel energy storage method and system, and belongs to the technical field of magnetic suspension energy storage equipment. The problem that in the prior art, the efficiency and reliability of the whole energy storage system are possibly affected due to poor heat dissipation is solved, the flywheel rotor is suspended in the vacuum cavity through the magnetic suspension technology, friction loss can be effectively reduced, and therefore the efficiency and reliability of the system are improved; high-efficiency conversion between electric energy and mechanical kinetic energy is achieved, redundant electric energy can be stored, energy can be released as needed, the magnetic suspension flywheel has good energy conversion flexibility, high-speed airflow can be introduced to the surface of the flywheel rotor and key parts close to the magnetic suspension bearing for heat dissipation through the pneumatic auxiliary heat dissipation device, heat is taken away in time, and the service life of the flywheel is prolonged. High temperature is prevented from affecting performance and safety of the magnetic suspension flywheel, and long-time stable operation of the magnetic suspension flywheel is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic levitation energy storage equipment, and in particular to a pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method and system. Background Art

[0002] Flywheel energy storage, as a physical energy storage method, has attracted widespread attention due to its high power density, long cycle life, and environmental friendliness. However, in practical applications, the high-speed rotation of the flywheel rotor generates a large amount of heat. If the heat is not dissipated properly, it will lead to the degradation of the flywheel rotor material performance and the instability of the magnetic bearing, thus affecting the efficiency and reliability of the entire energy storage system. Therefore, this method does not meet existing needs. To address this problem, we propose a method and system for magnetic levitation flywheel energy storage with pneumatically assisted heat dissipation. Summary of the Invention

[0003] The purpose of the present invention is to provide a pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method and system. By adopting magnetic levitation technology, the flywheel rotor is suspended in a vacuum chamber, and the efficient conversion of electrical energy and mechanical kinetic energy is achieved through motor drive. It can not only store excess electrical energy, but also release energy on demand, and has good energy conversion flexibility. Through the pneumatically assisted heat dissipation device, high-speed airflow is introduced to dissipate heat at key locations such as the flywheel rotor surface and near the magnetic levitation bearing, so as to take away heat in time and avoid high temperature affecting the performance and safety of the magnetic levitation flywheel, thereby solving the problems raised in the above-mentioned background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method, comprising the following steps:

[0005] The flywheel rotor is placed on a magnetic suspension bearing and suspended in a vacuum chamber by magnetic suspension technology;

[0006] The flywheel rotor is driven to rotate by the motor to realize the conversion between electrical energy and mechanical kinetic energy of the flywheel rotor, and the excess electrical energy is converted into kinetic energy of the flywheel rotor and stored;

[0007] When energy needs to be released, the flywheel rotor is controlled to reversely drive the motor to generate electricity, converting the stored mechanical kinetic energy into electrical energy output;

[0008] During the high-speed rotation of the flywheel rotor, a pneumatic auxiliary heat dissipation device is used to introduce high-speed airflow to specific parts of the flywheel rotor. Through the impact and disturbance of the airflow, forced convection removes the generated heat;

[0009] The specific parts of the flywheel rotor are the surface of the flywheel rotor and the vicinity of the magnetic bearing.

[0010] Furthermore, the flywheel rotor is suspended in the vacuum chamber by magnetic levitation technology, which includes the following steps:

[0011] The vacuum chamber is located in the housing, and the magnetic bearing is installed at a designated position in the vacuum chamber, and the connection between the magnetic bearing and the vacuum chamber is ensured to be firm;

[0012] placing the flywheel rotor on the magnetic bearing so that the locating features of the flywheel rotor are aligned with corresponding portions of the magnetic bearing, and determining the initial relative position of the flywheel rotor and the magnetic bearing using a sensor;

[0013] The flywheel rotor is suspended in a vacuum chamber through magnetic levitation technology combined with control algorithms;

[0014] At the same time, the suspension state of the flywheel rotor is monitored in real time to ensure that the flywheel rotor is suspended at a predetermined height position in the vacuum chamber.

[0015] Furthermore, the flywheel rotor is suspended in the vacuum chamber by using magnetic levitation technology combined with a control algorithm, including the following steps:

[0016] Start the power supply of the magnetic suspension system to provide stable current to the electromagnetic coil of the magnetic suspension bearing;

[0017] A control algorithm is used to obtain the magnetic force required to levitate the flywheel rotor by comprehensively considering the mass and moment of inertia of the flywheel rotor, the electromagnetic characteristics of the magnetic bearing, and the initial relative position data, wherein the control algorithm includes but is not limited to a fuzzy control method or a neural network control method;

[0018] After determining the required magnetic force, the current of the electromagnetic coil is gradually increased to enable the magnetic bearing to generate a stable magnetic field force, gradually suspending the flywheel rotor evenly from the bottom center point upwards.

[0019] Furthermore, real-time monitoring of the suspension state of the flywheel rotor includes the following steps:

[0020] After the flywheel rotor is suspended, a monitoring network consisting of multiple sensors is used, and the sensors are distributed in different parts of the flywheel rotor and around the magnetic bearing;

[0021] The deployed sensors collect the flywheel rotor's suspension height, vibration amplitude, vibration frequency, bearing temperature, and magnetic field strength in real time;

[0022] The collected real-time data is analyzed and compared with the preset threshold range to determine whether the status of the flywheel rotor is normal. Once an abnormality is found, an alarm is immediately issued.

[0023] Furthermore, the flywheel rotor is driven to rotate by the motor to realize the conversion between electrical energy and mechanical kinetic energy of the flywheel rotor, which includes the following steps:

[0024] Based on the actual energy storage requirements and the motor's performance parameters, an optimization algorithm is used to determine the motor's optimal drive mode and operating parameters, including starting torque and starting current.

[0025] Based on the determined driving mode and operating parameters, the motor is started to drive the flywheel rotor to rotate, while the speed of the flywheel rotor, as well as the current and voltage parameters of the motor are monitored in real time;

[0026] According to the real-time speed of the flywheel rotor, the current and voltage load of the motor, and the overall needs of the energy storage system, the driving power and driving frequency of the motor are dynamically adjusted so that the speed of the flywheel rotor gradually reaches a certain proportion of the rated speed. Among them, the speed of the flywheel rotor must reach 80%-90% of the rated speed.

[0027] Furthermore, controlling the flywheel rotor to reversely drive the motor to generate electricity and convert the stored mechanical kinetic energy into electrical energy output includes the following steps:

[0028] When energy needs to be released, the optimal power generation mode and control parameters, including the starting torque and frequency, are determined based on the current speed of the flywheel rotor, the amount of stored energy, and the load requirements.

[0029] Convert the connection between the flywheel rotor and the motor into a power generation mode, so that the flywheel rotor drives the motor in reverse to generate electricity, while monitoring the motor's generated voltage, current, and the speed drop of the flywheel rotor in real time;

[0030] When the flywheel rotor reverse drives the motor to generate electricity, the generated power is adjusted in real time according to the dynamic changes of the load so that the output power always meets the load demand.

[0031] Furthermore, a pneumatic auxiliary heat dissipation device is used to introduce high-speed airflow to a specific part of the flywheel rotor. Through the impact and disturbance of the airflow, forced convection is used to remove the generated heat, including the following steps:

[0032] An air channel is provided on the vacuum chamber, the air channel is connected to an external air source, and the external air source inputs cooling gas with a certain pressure and flow rate into the air channel;

[0033] After the cooling gas flows and is evenly distributed in the airway, it directly impacts the heat-generating components, including the flywheel rotor surface and the magnetic bearing. Through the heat exchange between the cooling gas and the heat-generating components, the heat is removed from the surface of the heat-generating components.

[0034] The high-temperature gas after heat dissipation is discharged through the exhaust port provided on the vacuum chamber, completing the heat dissipation cycle process.

[0035] Furthermore, the high-temperature gas after heat dissipation is discharged through the exhaust port provided on the vacuum chamber, completing the heat dissipation cycle process, which includes the following steps:

[0036] During the heat dissipation process, optical fiber temperature sensors are used to monitor the temperature data of the flywheel rotor surface and the vicinity of the magnetic bearing in real time;

[0037] Analyze the collected temperature data to see if it is always within the preset temperature safety range. Specifically:

[0038] If the temperature data is always within the preset temperature safety range, the exhaust port is controlled to open to discharge the high-temperature gas;

[0039] If the temperature data is not always within the preset temperature safety range, the pneumatic assisted cooling workflow will continue to be executed.

[0040] A pneumatically assisted heat dissipation magnetic levitation flywheel energy storage system is used to implement a pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method, the system comprising:

[0041] a flywheel rotor configured to store and release mechanical kinetic energy;

[0042] a magnetic bearing configured to support and levitate the flywheel rotor;

[0043] a vacuum chamber disposed within the housing and configured to provide a placement space for the flywheel rotor;

[0044] a motor configured to drive the flywheel rotor to rotate and to convert electrical energy into mechanical kinetic energy of the flywheel rotor;

[0045] The pneumatic assisted heat dissipation device includes an air duct and an exhaust port. The air duct and the exhaust port are arranged on the vacuum chamber, and the air duct is connected to the external air source. It is used to guide the cooling gas to flow and impact the flywheel rotor surface and the magnetic levitation bearing. The exhaust port is used to discharge the high-temperature gas after heat dissipation.

[0046] Furthermore, the system also includes a pre-treatment step before the operation of the pneumatic assisted heat dissipation magnetic levitation flywheel energy storage system, including a treatment process for the flywheel rotor surface, specifically:

[0047] For the treatment process of the flywheel rotor surface: immerse the flywheel rotor in the cleaning liquid and use ultrasonic cleaning equipment to clean it;

[0048] The surface is roughened by sandblasting. After sandblasting, compressed air is used to blow the flywheel rotor surface to remove residual sand particles.

[0049] After the above treatment, the material is coated on the surface of the flywheel rotor, and the surface is polished after the coating is completed.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] The present invention adopts magnetic levitation technology to suspend the flywheel rotor in a vacuum chamber, which can effectively reduce friction loss and thus improve system efficiency and reliability. The flywheel rotor is then driven to rotate by a motor, which can realize efficient conversion of electrical energy and mechanical kinetic energy. It can store excess electrical energy and release energy on demand, so that the magnetic levitation flywheel has good energy conversion flexibility. Through the pneumatic auxiliary heat dissipation device, high-speed airflow can be introduced to dissipate heat at key locations such as the flywheel rotor surface and near the magnetic levitation bearing, thereby removing heat in time, avoiding high temperature affecting the performance and safety of the magnetic levitation flywheel, and ensuring long-term stable operation of the magnetic levitation flywheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a flow chart of a pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method of the present invention;

[0053] Figure 2 This is a structural diagram of a pneumatically assisted heat dissipation magnetic levitation flywheel energy storage system of the present invention.

[0054] In the figure: 1. Housing; 2. Flywheel rotor; 3. Magnetic bearing; 4. Vacuum chamber; 5. Motor; 6. Air duct; 7. Exhaust port. DETAILED DESCRIPTION

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0056] In order to solve the technical problem that in the actual application of existing magnetic levitation flywheels, a large amount of heat is generated when the flywheel rotor rotates at high speed. If the heat dissipation is not good, it will lead to the degradation of the flywheel rotor material performance and the unstable operation of the magnetic levitation bearing, thus affecting the efficiency and reliability of the entire energy storage system, please refer to Figure 1-Figure 2 , this embodiment provides the following technical solutions:

[0057] A pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method comprises the following steps:

[0058] The flywheel rotor 2 is placed on the magnetic suspension bearing 3, and the flywheel rotor 2 is suspended in the vacuum chamber 4 by magnetic suspension technology;

[0059] The motor 5 drives the flywheel rotor 2 to rotate, realizing the conversion between electrical energy and mechanical kinetic energy of the flywheel rotor 2, and converting excess electrical energy into kinetic energy of the flywheel rotor 2 for storage;

[0060] When energy needs to be released, the flywheel rotor 2 is controlled to reversely drive the motor 5 to generate electricity, converting the stored mechanical kinetic energy into electrical energy output;

[0061] During the high-speed rotation of the flywheel rotor 2, a pneumatic auxiliary heat dissipation device is used to introduce high-speed airflow to a specific part of the flywheel rotor 2. Through the impact and disturbance of the airflow, forced convection removes the generated heat;

[0062] The specific portion of the flywheel rotor 2 is the surface of the flywheel rotor 2 and the vicinity of the magnetic bearing 3 .

[0063] The technical effect of the above technical solution is: the flywheel rotor 2 can be stably suspended in the vacuum chamber 4 by using magnetic levitation technology. In the traditional flywheel energy storage system, mechanical friction will consume a considerable amount of energy. The use of magnetic levitation technology can reduce friction loss, thereby improving the operating efficiency and reliability. The flywheel rotor 2 is driven to rotate by the motor 5, so that the efficient conversion of electrical energy and mechanical kinetic energy can be achieved, thereby converting excess electrical energy into kinetic energy storage of the flywheel rotor, and when energy needs to be released, the motor can be driven in reverse to generate electricity, and the stored mechanical kinetic energy can be converted into electrical energy output, thereby improving energy utilization efficiency. When the flywheel rotor 2 rotates at high speed, a pneumatic auxiliary heat dissipation device is used to introduce high-speed airflow to a specific part of the flywheel rotor 2, and the generated heat is removed by forced convection, thereby avoiding the influence of high temperature on the performance and safety of the magnetic levitation flywheel, and ensuring the stable operation of the magnetic levitation flywheel.

[0064] The flywheel rotor 2 is suspended in the vacuum chamber 4 by magnetic levitation technology, including the following steps:

[0065] The vacuum chamber 1 is located in the housing 1 , and the magnetic bearing 3 is installed at a designated position in the vacuum chamber 1 , and the connection between the magnetic bearing 3 and the vacuum chamber 1 is ensured to be firm;

[0066] Placing the flywheel rotor 2 on the magnetic bearing 3 so that the positioning features of the flywheel rotor 2 are aligned with the corresponding parts of the magnetic bearing 3, and using a sensor to determine the initial relative position of the flywheel rotor 2 and the magnetic bearing 3;

[0067] The flywheel rotor 2 is suspended in the vacuum chamber 4 by using magnetic levitation technology combined with a control algorithm;

[0068] At the same time, the suspension state of the flywheel rotor 2 is monitored in real time to ensure that the flywheel rotor 2 is suspended at a predetermined height position in the vacuum chamber 4 .

[0069] The technical effect of the above technical solution is: the magnetic levitation bearing 3 is installed at a specified position in the vacuum chamber 4 and ensures that it is firmly connected to the vacuum chamber 6, which is beneficial to the sealing and integration of the entire magnetic levitation flywheel, and the vacuum environment helps to reduce air resistance and improve the rotation efficiency of the flywheel rotor 2. By combining magnetic levitation technology with a control algorithm, the flywheel rotor 2 can be accurately suspended at a predetermined height position in the vacuum chamber 4. Compared with some simple suspension or contact support methods, magnetic levitation can avoid position deviation and vibration caused by mechanical contact. For example, the suspension position accuracy of the flywheel rotor 2 can be controlled at the micron level, ensuring the stability of the flywheel rotor 2 during high-speed rotation, reducing energy loss and system vibration caused by position shaking, and real-time monitoring of the suspension state of the flywheel rotor 2. Dynamic adjustment is performed using a control algorithm, so that the flywheel energy storage system can remain stable in a complex operating environment, avoiding collision between the flywheel rotor 2 and the vacuum chamber 4, thereby extending the service life of the equipment.

[0070] The flywheel rotor 2 is suspended in the vacuum chamber 4 by using magnetic levitation technology combined with a control algorithm, including the following steps:

[0071] Start the power supply of the magnetic suspension system to provide a stable current to the electromagnetic coil of the magnetic suspension bearing 3;

[0072] A control algorithm is used to obtain the magnetic force required to levitate the flywheel rotor 2 by comprehensively considering the mass and moment of inertia of the flywheel rotor 2, the electromagnetic characteristics of the magnetic bearing 3, and the initial relative position data, wherein the control algorithm includes but is not limited to a fuzzy control method or a neural network control method;

[0073] After the required magnetic force is determined, the current of the electromagnetic coil is gradually increased to enable the magnetic bearing 3 to generate a stable magnetic field force, gradually suspending the flywheel rotor 2 upward from the bottom center point evenly.

[0074] The technical effect of the above technical solution is: by using a control algorithm to comprehensively consider the mass, rotational inertia, electromagnetic characteristics of the magnetic bearing 3 and initial relative position data of the flywheel rotor, the magnetic force required to suspend the flywheel rotor 2 can be accurately calculated. Compared with the traditional fixed magnetic suspension method, this method can control the accuracy of the suspension position within an extremely small range, ensuring the stability of the flywheel rotor 2 during high-speed rotation, and gradually and evenly suspending the flywheel rotor 2 upward from the bottom center point, which can avoid the flywheel rotor 2 from tilting or local stress concentration during the suspension process.

[0075] Real-time monitoring of the suspension state of the flywheel rotor 2 includes the following steps:

[0076] After the flywheel rotor 2 is suspended, a monitoring network consisting of multiple sensors is used, and the sensors are distributed in different parts of the flywheel rotor 2 and around the magnetic bearing 3;

[0077] The deployed sensors collect the levitation height, vibration amplitude, vibration frequency, bearing temperature and magnetic field strength of the flywheel rotor 2 in real time;

[0078] Analyze the collected real-time data and compare it with the preset threshold range to determine whether the state of the flywheel rotor 2 is normal;

[0079] Once any abnormality is detected, an alarm will be issued immediately.

[0080] The technical effect of the above technical solution is: various status parameters of the flywheel rotor 2 are monitored in real time by sensors and compared with preset thresholds. Once an abnormality is found, an alarm can be immediately issued, so that the operator can take measures quickly to avoid potential safety accidents and ensure that the flywheel rotor 2 is suspended at a predetermined height position in the vacuum chamber 4, thereby helping to maintain the flywheel rotor 2 in the optimal suspension position and operating state.

[0081] The motor 5 drives the flywheel rotor 2 to rotate, thereby realizing the conversion between electrical energy and mechanical kinetic energy of the flywheel rotor 2, which includes the following steps:

[0082] According to the actual energy storage requirements and the performance parameters of the motor 5, an optimization algorithm is used to determine the optimal driving mode and operating parameters of the motor 5, including the starting torque and the starting current;

[0083] Based on the determined driving mode and operating parameters, the motor 5 is started to drive the flywheel rotor 2 to rotate, while the speed of the flywheel rotor 2 and the current and voltage parameters of the motor 5 are monitored in real time;

[0084] According to the real-time speed of the flywheel rotor 2, the current and voltage load of the motor 5, and the overall requirements of the energy storage system, the driving power and driving frequency of the motor 5 are dynamically adjusted so that the speed of the flywheel rotor 2 gradually reaches a certain proportion of the rated speed, among which the speed of the flywheel rotor 2 must reach 80%-90% of the rated speed.

[0085] The technical effect of the above technical solution is: the optimization algorithm is used to determine the optimal driving mode and operating parameters of the motor 5, so that the motor 5 can achieve the conversion between electrical energy and mechanical kinetic energy with higher efficiency when driving the flywheel rotor 2 to rotate, and the reasonable starting torque and starting current are determined by the optimization algorithm, and the driving power and frequency of the motor 5 are smoothly and dynamically adjusted, which can avoid the motor 5 and the flywheel rotor 2 from being subjected to excessive impact force and stress during startup and operation, and help reduce the mechanical fatigue of the motor 5 and the flywheel rotor 2, thereby reducing the risk of component damage, and real-time monitoring of the flywheel rotor 2 speed and the current and voltage parameters of the motor 5, and dynamic adjustment is made accordingly to ensure that the flywheel energy storage system operates in a stable operating state.

[0086] Controlling the flywheel rotor 2 to reversely drive the motor 5 to generate electricity and convert the stored mechanical kinetic energy into electrical energy output includes the following steps:

[0087] When energy needs to be released, the optimal power generation mode and control parameters, including the starting torque and frequency of power generation, are determined based on the current speed of the flywheel rotor 2, the stored energy value, and the load demand;

[0088] The connection between the flywheel rotor 2 and the motor 5 is switched to a power generation mode, so that the flywheel rotor 2 drives the motor 5 in reverse to generate electricity, while simultaneously monitoring the generated voltage and current of the motor 5 and the speed drop of the flywheel rotor 2 in real time;

[0089] When the flywheel rotor 2 reversely drives the motor 5 to generate electricity, the generated power is adjusted in real time according to the dynamic changes of the load, so that the output electric energy always meets the demand of the load.

[0090] The technical effects of the above technical solution are as follows: the optimal power generation mode and control parameters are determined according to the current speed, stored energy value and load demand of the flywheel rotor 2, thereby achieving precise control of the power generation process, avoiding energy waste or low power generation efficiency caused by unreasonable power generation starting conditions, and thus improving the efficiency of converting mechanical kinetic energy into electrical energy. By real-time monitoring of the generated voltage and current of the motor 5 and the speed drop of the flywheel rotor 2, and making dynamic adjustments accordingly, a smooth speed drop of the flywheel rotor 2 during the power generation process is achieved, thereby avoiding mechanical shock, motor overload and other problems that may be caused by a sharp drop in the speed of the flywheel rotor 2, ensuring the stability of the power generation process and the reliability of the system operation, and extending the service life of the flywheel rotor 2 and the motor. During the power generation process, the generated power is adjusted in real time according to the dynamic changes of the load so that the output power always meets the load demand. This dynamic adjustment capability ensures the quality and stability of the power output, avoids voltage fluctuations, excessive or insufficient current and other problems caused by the mismatch between the generated power and the load, and improves the availability and reliability of the power output.

[0091] A pneumatic auxiliary heat dissipation device is used to introduce high-speed airflow to a specific part of the flywheel rotor 2. Through the impact and disturbance of the airflow, forced convection removes the generated heat, including the following steps:

[0092] An air channel 6 is provided on the vacuum chamber 4, and the air channel 6 is connected to an external air source, and the external air source inputs cooling gas with a certain pressure and flow rate into the air channel 6;

[0093] After the cooling gas flows and is evenly distributed in the air channel 6, it directly impacts the heat-generating components, including the surface of the flywheel rotor 2 and the magnetic bearing 3. The heat is removed from the surface of the heat-generating components through heat exchange between the cooling gas and the heat-generating components.

[0094] The high-temperature gas after heat dissipation is discharged through the exhaust port 7 provided on the vacuum chamber 4, completing the heat dissipation cycle process.

[0095] The technical effect of the above technical solution is: an air duct 6 is provided on the vacuum chamber 4 and connected to an external air source. The heat dissipation design is closely integrated with the overall structure of the flywheel energy storage system and does not require excessive additional space. After the cooling gas flows and is evenly distributed in the air duct 6, it directly impacts the heat-generating components, thereby enhancing the convective heat exchange between the cooling gas and the heat-generating components, and can transfer heat to the cooling gas and discharge it more quickly. The cooling gas directly impacts the surface of the flywheel rotor 2 and key heat-generating components such as the magnetic bearing 3, and can quickly take heat away from these parts, thereby achieving precise and effective heat dissipation. Compared with natural cooling or simple air cooling, it can effectively prevent the heat-generating components from experiencing performance degradation or failure due to overheating.

[0096] The high-temperature gas after heat dissipation is discharged through the exhaust port 7 provided on the vacuum chamber 4, completing the heat dissipation cycle process, including the following steps:

[0097] During the heat dissipation process, an optical fiber temperature sensor is used to monitor the temperature data of the flywheel rotor 2 surface and the vicinity of the magnetic bearing 3 in real time;

[0098] Analyze the collected temperature data to see if it is always within the preset temperature safety range. Specifically:

[0099] If the temperature data is always within the preset temperature safety range, the exhaust port 7 is controlled to open to discharge the high-temperature gas;

[0100] If the temperature data is not always within the preset temperature safety range, the pneumatic assisted cooling workflow will continue to be executed.

[0101] The technical effect of the above technical solution is: by using the optical fiber temperature sensor to monitor the temperature data of the flywheel rotor surface and the vicinity of the magnetic levitation bearing in real time, the temperature information of the key parts can be accurately obtained, providing a reliable basis for subsequent heat dissipation control. When the temperature is within the safe range, the exhaust port 7 is promptly controlled to open and the high-temperature gas after heat dissipation is discharged to avoid heat accumulation in the chamber, thereby maintaining the temperature balance in the chamber and improving the heat dissipation efficiency. On the contrary, the pneumatic assisted heat dissipation workflow is continued to be executed. According to the comparison results of the real-time temperature data with the preset temperature safety range, the opening timing of the exhaust port 7 can be reasonably controlled while ensuring the heat dissipation effect, avoiding unnecessary exhaust operations, and helping to maintain the pressure balance and gas flow stability in the vacuum chamber 4.

[0102] Specifically, this embodiment further proposes a pneumatically assisted heat dissipation magnetic levitation flywheel energy storage system, which is used to implement a pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method. The system includes:

[0103] a flywheel rotor 2 configured to store and release mechanical kinetic energy;

[0104] a magnetic bearing 3 configured to support the flywheel rotor 2 and suspend the flywheel rotor 2;

[0105] The vacuum chamber 4 is disposed in the housing 1 and is configured to provide a placement space for the flywheel rotor 2;

[0106] a motor 5 configured to drive the flywheel rotor 2 to rotate and to convert electrical energy into mechanical kinetic energy of the flywheel rotor 2;

[0107] A pneumatic assisted heat dissipation device includes an air channel 6 and an exhaust port 7. The air channel 6 and the exhaust port 7 are arranged on the vacuum chamber 4, and the air channel 6 is connected to an external air source to guide the cooling gas to flow and impact the surface of the flywheel rotor 2 and the magnetic bearing 3. The exhaust port 7 is used to discharge the high-temperature gas after heat dissipation;

[0108] It also includes a pre-treatment step before the operation of the pneumatic assisted heat dissipation magnetic levitation flywheel energy storage system, including a treatment process for the surface of the flywheel rotor 2, specifically:

[0109] For the treatment process of the flywheel rotor 2 surface: immerse the flywheel rotor 2 in a cleaning solution and use an ultrasonic cleaning device to clean it, wherein the cleaning solution is a deionized water solution mixed with a surfactant, and its components may include 5%-10% by mass of sodium alkylbenzene sulfonate, 3%-6% of fatty alcohol polyoxyethylene ether, etc. The ultrasonic frequency of the ultrasonic cleaning device is set at 20kHz-40kHz, and the cleaning time lasts for 15-30 minutes, so as to remove impurities such as oil, iron filings, dust, etc. on the surface of the flywheel rotor 2, ensuring that the surface is free of oil, oxide scale, rust, etc.;

[0110] After cleaning, use a high-pressure air gun (air pressure controlled at 0.5MPa-0.8MPa) to blow the surface of the flywheel rotor 2 to remove the residual cleaning liquid and moisture, and then place it in a clean environment to dry naturally or use low-temperature drying equipment (temperature not exceeding 60°C) for drying;

[0111] The surface is roughened by sandblasting. The reason for sandblasting is that if the surface of the flywheel rotor 2 is too smooth, it will be detrimental to the adhesion of the subsequent coating and the sufficient contact and heat exchange between the airflow and the surface during pneumatic assisted heat dissipation. After sandblasting, the surface of the flywheel rotor 2 is blown with compressed air to remove the residual sand particles and ensure that the surface is clean and dust-free.

[0112] After the above treatment, a layer of coating material with good heat dissipation performance, such as an aluminum-copper composite coating, is coated on the surface of the flywheel rotor 2 using magnetron sputtering technology. After the coating is completed, the flywheel rotor 2 is placed in a constant temperature and humidity curing room (temperature 25°C ± 2°C, humidity 40%-60%) and allowed to stand for 24-48 hours to fully cure the coating and improve its adhesion and thermal stability. After the coating is completed, the surface is polished using high-precision polishing equipment to remove minor defects and roughness on the coating surface.

[0113] The technical effect of the above technical solution is: the flywheel rotor 2 is stably suspended in the vacuum chamber 4 by using magnetic levitation technology, which can reduce friction loss and improve operating efficiency. The flywheel rotor 2 is driven to rotate by the motor 5, thereby realizing efficient conversion of electrical energy and mechanical kinetic energy, thereby improving energy utilization efficiency. When the flywheel rotor 2 rotates at high speed, a pneumatic auxiliary heat dissipation device is used to introduce high-speed airflow to a specific part of the flywheel rotor 2, and the heat generated is removed by forced convection, thereby avoiding the impact of high temperature on the performance and safety of the magnetic levitation flywheel. Before performing the above operations, the surface of the flywheel rotor 2 is ultrasonically cleaned, sandblasted, coated and polished, thereby comprehensively improving the performance and reliability of the flywheel rotor 2.

[0114] Working principle: By adopting magnetic levitation technology to suspend the flywheel rotor 2 in the vacuum chamber 4, friction loss can be effectively reduced, thereby improving system efficiency and reliability. The flywheel rotor 2 is then driven to rotate by the motor 5, which can achieve efficient conversion of electrical energy and mechanical kinetic energy, making the magnetic levitation flywheel have good energy conversion flexibility. Through the pneumatic auxiliary heat dissipation device, high-speed airflow can be introduced to dissipate heat at key locations such as the surface of the flywheel rotor 2 and near the magnetic levitation bearing 3, thereby removing heat in time, avoiding high temperature affecting the performance and safety of the magnetic levitation flywheel, and ensuring long-term stable operation of the magnetic levitation flywheel.

[0115] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0116] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method, characterized in that: The following steps are involved: Placing a flywheel rotor (2) on a magnetic suspension bearing (3), and suspending the flywheel rotor (2) in a vacuum chamber (4) using magnetic suspension technology; The flywheel rotor (2) is driven to rotate by the motor (5), thereby realizing the conversion between electrical energy and mechanical kinetic energy of the flywheel rotor (2), and converting excess electrical energy into kinetic energy of the flywheel rotor (2) for storage; When energy needs to be released, the flywheel rotor (2) is controlled to reversely drive the motor (5) to generate electricity, thereby converting the stored mechanical kinetic energy into electrical energy output; During the high-speed rotation of the flywheel rotor (2), a pneumatic auxiliary heat dissipation device is used to introduce high-speed airflow to a specific portion of the flywheel rotor (2), and the generated heat is removed by forced convection through the impact and disturbance of the airflow; The specific portion of the flywheel rotor (2) is the surface of the flywheel rotor (2) and the vicinity of the magnetic suspension bearing (3).

2. The pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method according to claim 1 is characterized in that: The flywheel rotor (2) is suspended in a vacuum chamber (4) by using magnetic levitation technology, comprising the following steps: The vacuum chamber (1) is located in the housing (1), and the magnetic suspension bearing (3) is installed at a designated position of the vacuum chamber (1), and the connection between the magnetic suspension bearing (3) and the vacuum chamber (1) is ensured to be firm; Placing a flywheel rotor (2) on a magnetic bearing (3) so that a positioning feature of the flywheel rotor (2) is aligned with a corresponding portion of the magnetic bearing (3), and using a sensor to determine an initial relative position of the flywheel rotor (2) and the magnetic bearing (3); The flywheel rotor (2) is suspended in a vacuum chamber (4) by using magnetic levitation technology combined with a control algorithm; At the same time, the suspension state of the flywheel rotor (2) is monitored in real time to ensure that the flywheel rotor (2) is suspended at a predetermined height position within the vacuum chamber (4).

3. The pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method according to claim 2 is characterized in that: The flywheel rotor (2) is suspended in a vacuum chamber (4) by using magnetic levitation technology combined with a control algorithm, including the following steps: Starting the power supply of the magnetic suspension system to provide a stable current to the electromagnetic coil of the magnetic suspension bearing (3); A control algorithm is used, and the mass, moment of inertia, electromagnetic characteristics of the magnetic bearing (3), and initial relative position data of the flywheel rotor (2) are comprehensively considered to obtain the magnetic force required to levitate the flywheel rotor (2), wherein the control algorithm includes but is not limited to a fuzzy control method or a neural network control method; After the required magnetic force is determined, the current of the electromagnetic coil is gradually increased to enable the magnetic suspension bearing (3) to generate a stable magnetic field force, gradually suspending the flywheel rotor (2) upward from the bottom center point evenly.

4. The pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method according to claim 2, characterized in that: Real-time monitoring of the suspension state of the flywheel rotor (2) includes the following steps: After the flywheel rotor (2) is suspended, a monitoring network composed of multiple sensors is used, and the sensors are distributed at different parts of the flywheel rotor (2) and around the magnetic suspension bearing (3); The deployed sensors collect the levitation height, vibration amplitude, vibration frequency, bearing temperature and magnetic field strength of the flywheel rotor (2) in real time; The collected real-time data is analyzed and compared with a preset threshold range to determine whether the state of the flywheel rotor (2) is normal. If an abnormality is found, an alarm is immediately issued.

5. The pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method according to claim 1 is characterized in that: The flywheel rotor (2) is driven to rotate by a motor (5) to realize the conversion between electrical energy and mechanical kinetic energy of the flywheel rotor (2), comprising the following steps: According to actual energy storage requirements and performance parameters of the motor (5), an optimization algorithm is used to determine the optimal driving mode and operating parameters of the motor (5), including starting torque and starting current; Based on the determined driving mode and operating parameters, the motor (5) is started to drive the flywheel rotor (2) to rotate, while simultaneously monitoring the speed of the flywheel rotor (2) and the current and voltage parameters of the motor (5) in real time; According to the real-time speed of the flywheel rotor (2), the current and voltage load of the motor (5), and the overall demand of the energy storage system, the driving power and driving frequency of the motor (5) are dynamically adjusted so that the speed of the flywheel rotor (2) gradually reaches a certain proportion of the rated speed, wherein the speed of the flywheel rotor (2) must reach 80%-90% of the rated speed.

6. The pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method according to claim 1 is characterized in that: Controlling the flywheel rotor (2) to reversely drive the motor (5) to generate electricity and convert the stored mechanical kinetic energy into electrical energy output includes the following steps: When energy needs to be released, the optimal power generation mode and control parameters, including the starting torque and the power generation frequency, are determined based on the current speed of the flywheel rotor (2), the stored energy value, and the load demand; The connection between the flywheel rotor (2) and the motor (5) is converted into a power generation mode, so that the flywheel rotor (2) drives the motor (5) in reverse to generate power, while simultaneously monitoring the generated voltage and current of the motor (5) and the speed drop of the flywheel rotor (2) in real time; In the process of the flywheel rotor (2) reversely driving the motor (5) to generate electricity, the generated power is adjusted in real time according to the dynamic changes of the load, so that the output electric energy always meets the demand of the load.

7. The pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method according to claim 1 is characterized in that: A pneumatic auxiliary heat dissipation device is used to introduce high-speed airflow to a specific part of a flywheel rotor (2), and forced convection is used to remove the generated heat through the impact and disturbance of the airflow, including the following steps: An air channel (6) is provided on the vacuum chamber (4), the air channel (6) is connected to an external air source, and the external air source inputs cooling gas with a certain pressure and flow rate into the air channel (6); After the cooling gas flows and is evenly distributed in the air channel (6), it directly impacts the heat-generating components, including the surface of the flywheel rotor (2) and the magnetic bearing (3), and removes heat from the surface of the heat-generating components through heat exchange between the cooling gas and the heat-generating components; The high-temperature gas after heat dissipation is discharged through an exhaust port (7) provided on the vacuum chamber (4), completing the heat dissipation cycle.

8. The pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method according to claim 7, characterized in that: The high-temperature gas after heat dissipation is discharged through the exhaust port (7) provided on the vacuum chamber (4), completing the heat dissipation cycle process, which includes the following steps: During the heat dissipation process, an optical fiber temperature sensor is used to monitor the temperature data of the flywheel rotor (2) surface and the vicinity of the magnetic suspension bearing (3) in real time; Analyze the collected temperature data to see if it is always within the preset temperature safety range. Specifically: If the temperature data is always within the preset temperature safety range, the exhaust port (7) is controlled to open to discharge the high-temperature gas; If the temperature data is not always within the preset temperature safety range, the pneumatic assisted cooling workflow will continue to be executed.

9. A pneumatically assisted heat dissipation magnetic levitation flywheel energy storage system, used to implement the pneumatically assisted heat dissipation magnetic levitation flywheel energy storage method according to any one of claims 1 to 8, characterized in that: include: a flywheel rotor (2) configured to store and release mechanical kinetic energy; A magnetic suspension bearing (3) configured to support the flywheel rotor (2) and suspend the flywheel rotor (2); A vacuum chamber (4) is disposed in the housing (1) and is configured to provide a placement space for the flywheel rotor (2); a motor (5) configured to drive the flywheel rotor (2) to rotate, thereby converting electrical energy into mechanical kinetic energy of the flywheel rotor (2); The pneumatic auxiliary heat dissipation device comprises an air duct (6) and an exhaust port (7). The air duct (6) and the exhaust port (7) are arranged on a vacuum chamber (4), and the air duct (6) is connected to an external air source and is used to guide the cooling gas to flow and impact the surface of the flywheel rotor (2) and the magnetic suspension bearing (3). The exhaust port (7) is used to discharge the high-temperature gas after heat dissipation.

10. The pneumatically assisted heat dissipation magnetic levitation flywheel energy storage system according to claim 9, characterized in that: The system further comprises a pre-processing step before the operation of the pneumatic assisted heat dissipation magnetic levitation flywheel energy storage system, comprising a surface treatment process for the flywheel rotor (2), specifically: The surface treatment process of the flywheel rotor (2) is as follows: the flywheel rotor (2) is immersed in a cleaning solution and cleaned using an ultrasonic cleaning device; The surface is roughened by sandblasting, and after the sandblasting, the surface of the flywheel rotor (2) is blown with compressed air to remove residual sand particles; After the above treatment, the flywheel rotor (2) is coated with material and then polished.

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