Power generation system based on inertia flywheel

Abstract

The invention discloses a power generation system based on an inertia flywheel, which belongs to the technical field of power generation equipment and comprises a hydraulic power mechanism, a power generation mechanism, an energy storage mechanism and an inertia wheel gravitational potential energy mechanism. The hydraulic power mechanism is used for providing hydraulic power; the power generation mechanism is used for converting mechanical energy into electric energy; the energy storage mechanism is connected with the output end of the power generation mechanism and is used for storing the electric energy generated by the power generation mechanism; the inertia wheel gravitational potential energy mechanism comprises an inertia flywheel, and a flywheel shaft is fixed to the central axis of the inertia flywheel. The control mechanism is in signal connection with the hydraulic power mechanism, the power generation mechanism and the energy storage mechanism. According to the power generation system based on the inertia flywheel, kinetic energy is stored and released through the inertia flywheel, direct fluctuation of a hydraulic power source is effectively stabilized, extremely stable torque input is provided for the power generator, and therefore the power generation efficiency and quality are remarkably improved, and the stability of electric energy output is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of power generation equipment technology, and specifically relates to a power generation system based on an inertial flywheel. Background Technology

[0002] Hydraulic power generation systems, due to their high torque and adaptability, have found applications in fields such as engineering machinery and emergency power supply. However, traditional hydraulic power generation systems typically suffer from the following problems: First, the system structure is loose, with hydraulic pumps, motors, generators, and other components arranged independently, resulting in a long energy transmission chain, leading to low overall efficiency and significant energy loss. Second, the power output from the hydraulic source often fluctuates, causing unstable generation voltage and frequency when directly driving the generator, affecting power quality. Third, the system lacks intelligent global monitoring and feedback regulation, failing to adjust operating parameters in real time according to load changes or its own status, resulting in insufficient stability and reliability. Furthermore, existing systems often focus solely on power generation, neglecting the integrated design of power generation, energy storage, and power consumption, making it difficult to achieve cost-effective deployment and application in small to medium-sized scenarios.

[0003] Therefore, in order to address the aforementioned technical problems, it is necessary to provide a power generation system based on an inertial flywheel.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a power generation system based on an inertial flywheel, which introduces an inertial flywheel as a kinetic energy buffer and stabilization unit and combines it with intelligent closed-loop control to achieve efficient conversion and storage of hydraulic power into stable electrical energy. It has the advantages of compact structure, stable power generation, high degree of automation and wide adaptability.

[0006] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution: A power generation system based on an inertial flywheel includes a hydraulic power mechanism, a power generation mechanism, an energy storage mechanism, and an inertial flywheel gravitational potential energy mechanism; The hydraulic power mechanism is used to provide hydraulic power; A power generation mechanism is used to convert mechanical energy into electrical energy; The energy storage mechanism is connected to the output end of the power generation mechanism and is used to store the electrical energy generated by the power generation mechanism; The inertial wheel gravitational potential energy mechanism includes: An inertial flywheel, in which a flywheel shaft is fixed on its central axis; The control mechanism is signal-connected to the hydraulic power mechanism, the power generation mechanism, and the energy storage mechanism, respectively. The hydraulic output end of the hydraulic power mechanism is connected to and drives a hydraulic motor through an oil circuit. The output power of the hydraulic motor is transmitted to the flywheel shaft in sequence through the first pulley assembly, the reducer and the second pulley assembly to drive the inertial flywheel to rotate and store inertial kinetic energy. The flywheel shaft directly or indirectly drives the power generation mechanism to generate electricity; The control mechanism is configured to: monitor the operating parameters of the hydraulic power mechanism, the power generation mechanism, and the energy storage mechanism in real time, and display the monitored operating parameters; and adjust the hydraulic output of the hydraulic power mechanism and / or the electrical energy storage state of the energy storage mechanism in real time based on the feedback of the operating parameters.

[0007] In one or more embodiments of the present invention, the hydraulic power mechanism includes an AC motor, a hydraulic piston pump and a hydraulic control valve group connected in sequence; The power range of the AC motor is 30kW to 150kW, and the speed is 1450 rpm; The hydraulic power mechanism is configured to be compatible with an external hydraulic power source.

[0008] In one or more embodiments of the present invention, the power generation mechanism is a permanent magnet generator with a rated power range of 50kW to 3MW.

[0009] In one or more embodiments of the present invention, the hydraulic motor outputs a torque range of 1600 Nm to 30000 Nm and a speed range of 150 rpm to 2000 rpm.

[0010] In one or more embodiments of the present invention, the diameter of the inertial flywheel is 1.2 meters to 2.6 meters; The flywheel shaft has a diameter of 200 mm to 500 mm.

[0011] In one or more embodiments of the present invention, the energy storage mechanism is an energy storage cabinet with a capacity of 100AH ​​to 2000AH.

[0012] In one or more embodiments of the present invention, the output end of the energy storage cabinet is connected to the load end and simultaneously supplies power to the electrical equipment of the power generation system itself.

[0013] In one or more embodiments of the present invention, the control mechanism includes a sensor unit and a control panel; The sensor units are installed in each mechanism and are used to collect hydraulic pressure, flow rate, rotational speed, voltage, current and battery state of charge parameters. The control panel is mounted on the hydraulic power mechanism and is used to display the operating parameters collected by the sensor unit in real time.

[0014] In one or more embodiments of the present invention, the control panel is specifically configured to: generate an adjustment signal to control the hydraulic power mechanism based on fluctuations in the output voltage or frequency of the power generation mechanism, so as to stabilize the rotational speed of the inertial flywheel mechanism; And / or adjust the output power distribution of the power generation mechanism according to the remaining power of the energy storage mechanism.

[0015] In one or more embodiments of the present invention, the system is adapted to the hydraulic system of engineering machinery to form a mobile power generation device, or used as a small distributed power supply system or emergency power supply equipment.

[0016] Compared with existing technologies, the inertial flywheel-based power generation system of this invention effectively smooths out direct fluctuations in the hydraulic power source by storing and releasing kinetic energy through the inertial flywheel, providing the generator with an extremely stable torque input. This significantly improves power generation efficiency and quality, ensuring the stability of power output. Furthermore, the hydraulic drive, inertial energy storage, power generation, and electronic control modules are highly integrated into a single system framework, reducing space occupation and pipe / line losses caused by dispersed layouts, optimizing energy transfer paths, and improving overall efficiency.

[0017] The control mechanism of this invention enables real-time monitoring and visualization of the entire system's operating parameters and allows for adaptive adjustment based on feedback, forming a closed-loop control system. This not only avoids efficiency degradation caused by power fluctuations but also extends equipment lifespan and reduces the professional requirements for operators. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a power generation system based on an inertial flywheel according to an embodiment of the present invention; Figure 2 This is a logic control flowchart of the control mechanism of a power generation system based on an inertial flywheel according to an embodiment of the present invention.

[0020] Explanation of key figure labels: 10. Hydraulic power mechanism; 20. Hydraulic motor; 30. Reducer; 40. Inertia flywheel; 41. Flywheel shaft; 50. Permanent magnet generator; 60. Energy storage cabinet; 70. First pulley assembly; 80. Second pulley assembly; 90. Control panel. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0022] like Figure 1 As shown, an embodiment of the present invention provides a power generation system based on an inertial flywheel, comprising a hydraulic power mechanism 10, a power generation mechanism, an energy storage mechanism, and an inertial flywheel gravitational potential energy mechanism.

[0023] The hydraulic power unit 10 provides initial hydraulic power. In this embodiment, a 75 kW AC motor with a rated speed of 1450 rpm drives an axial piston variable pump. After the motor starts, the piston pump draws oil from the hydraulic tank and outputs high-pressure oil. The high-pressure oil circuit is connected to a low-speed, high-torque radial piston hydraulic motor 20. Under system control, this hydraulic motor 20 can output approximately 8000 Nm of torque, with a stable speed of approximately 450 rpm.

[0024] The core of the inertial wheel gravitational potential energy mechanism is the inertial flywheel 40 and its flywheel shaft 41, used to store and stabilize kinetic energy. The inertial flywheel 40 is made of high-strength cast iron and has a diameter of 1.6 meters. The flywheel shaft 41 has a diameter of 280 millimeters. The output shaft of the hydraulic motor 20 is connected to the input end of the reducer 30 through the first pulley assembly 70. The output shaft of the reducer 30 is connected to the flywheel shaft 41 through the second pulley assembly 80. This design further reduces the output speed of the hydraulic motor 20 and amplifies the torque before smoothly transmitting it to the inertial flywheel 40, driving it to accelerate and store inertial kinetic energy.

[0025] The power generation mechanism is used to convert mechanical energy into electrical energy. In this embodiment, a permanent magnet generator 50 with a rated power of 400 kW is used. The output end of the flywheel shaft 41 is directly and rigidly connected to the rotor shaft of the permanent magnet generator 50 via a heavy-duty disc coupling. Therefore, the stable inertial torque stored in the inertial flywheel 40 will directly drive the rotor of the permanent magnet generator 50 to rotate, achieving efficient power generation.

[0026] The energy storage mechanism is used to store electrical energy. In this embodiment, a standardized energy storage cabinet 60 is used. The nominal capacity of the energy storage cabinet 60 is 600AH. The energy storage cabinet 60 integrates a battery pack, a battery management system, a bidirectional converter, and necessary power distribution units. The AC power generated by the permanent magnet generator 50 is rectified and regulated by the converter to charge the battery pack. The stored electrical energy can be either inverted and output to an external load, or converted by DC / DC to power the system itself, achieving energy self-sufficiency.

[0027] like Figure 2 As shown, the control mechanism is the hub of the system's intelligent operation. Its core hardware is an industrial programmable logic controller (PLC), which integrates a high-definition LCD touchscreen as the control panel 90. The control mechanism collects operating parameters in real time through a sensor network distributed throughout the system. The monitored parameters necessarily include the system's core electrical parameters, such as the input current of the drive motor, the output current of each phase of the permanent magnet generator 50, and the charging and discharging current of the energy storage cabinet 60. All these parameters, including but not limited to current, voltage, frequency, power, pressure, speed, torque, temperature, and energy storage state of charge, are collected by the PLC and displayed dynamically on the control panel 90 in real time.

[0028] More importantly, the PLC is pre-installed with advanced control algorithms. These algorithms execute adjustment functions based on real-time feedback from monitored parameters. Specifically, when a sudden increase in external load causes a drop in generator output voltage, the control algorithm immediately calculates and outputs commands to increase the AC motor speed via the frequency converter or adjust the swashplate angle of the hydraulic variable pump to increase flow, thereby enhancing hydraulic power output, compensating for the system's instantaneous energy deficit, and maintaining stable flywheel speed and power generation. Simultaneously, the battery management system works in conjunction with the control mechanism to intelligently adjust the charging and discharging strategy of the energy storage cabinet 60 based on grid demand, load conditions, and battery status, achieving precise management of the stored energy status.

[0029] Furthermore, the AC motor and hydraulic pump in the aforementioned system can be removed, and the inlet of the hydraulic pump can be directly connected to the spare valve port of the construction machinery's hydraulic system. Utilizing the surplus power of the construction machinery's engine to drive this power generation system constitutes a mobile power generation device integrated with the construction machinery's hydraulic system.

[0030] It is worth noting that by installing the entire system in a containerized trailer or fixed machine room and connecting it to local fuel or renewable energy sources, it can function as a small power station for distributed power supply in rural areas, mountainous regions, and other areas with limited access to electricity, or as emergency power supply equipment for factories and hospitals. Its compact structure and automated control features make it highly cost-effective in such small and medium-sized power generation scenarios.

[0031] In operation, the control mechanism issues a command to activate the hydraulic power mechanism 10, and the hydraulic motor 20 drives the inertial flywheel 40 to accelerate through the transmission mechanism. The control mechanism monitors the rotational speed of the inertial flywheel 40 in real time until it reaches the predetermined operating speed. After the inertial flywheel 40 reaches a stable speed, it drives the permanent magnet generator 50 to generate electricity. Part of the generated electrical energy is processed by the converter in the energy storage cabinet 60 and stored in the battery, while the other part can be directly supplied to the load.

[0032] Throughout the operation, the control mechanism continuously collects the operating parameters of all key points and displays them visually on the control panel 90 in the form of numbers, curves, and instruments, so as to achieve real-time status feedback.

[0033] The core controller of the control mechanism compares the monitored data with the preset optimization target value. Once a deviation is detected, it immediately generates control commands to adjust the displacement of the hydraulic pump or the power of the prime mover, and / or adjust the charging and discharging mode of the energy storage cabinet 60, so that the system can quickly return to a stable and efficient operating state. This closed-loop process continues, thereby ensuring the stable operation of the system.

[0034] The inertial flywheel-based power generation system of this invention stores and releases kinetic energy through the inertial flywheel, effectively smoothing out direct fluctuations in the hydraulic power source and providing an extremely stable torque input to the generator. This significantly improves power generation efficiency and quality, ensuring the stability of power output. Furthermore, the hydraulic drive, inertial energy storage, power generation, and electronic control modules are highly integrated into a single system framework, reducing space occupation and pipe / line losses caused by dispersed layouts, optimizing energy transfer paths, and improving overall efficiency.

[0035] The control mechanism of this invention enables real-time monitoring and visualization of the entire system's operating parameters and allows for adaptive adjustment based on feedback, forming a closed-loop control system. This not only avoids efficiency degradation caused by power fluctuations but also extends equipment lifespan and reduces the professional requirements for operators.

[0036] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power generation system based on an inertial flywheel, characterized in that, include: A hydraulic power mechanism, used to provide hydraulic power; A power generation mechanism used to convert mechanical energy into electrical energy; An energy storage mechanism, connected to the output end of the power generation mechanism, is used to store the electrical energy generated by the power generation mechanism; The inertial wheel gravitational potential energy mechanism includes: An inertial flywheel, in which a flywheel shaft is fixed on its central axis; The control mechanism is signal-connected to the hydraulic power mechanism, the power generation mechanism, and the energy storage mechanism, respectively. The hydraulic output end of the hydraulic power mechanism is connected to and drives a hydraulic motor through an oil circuit. The output power of the hydraulic motor is transmitted to the flywheel shaft in sequence through the first pulley assembly, the reducer and the second pulley assembly to drive the inertial flywheel to rotate and store inertial kinetic energy. The flywheel shaft directly or indirectly drives the power generation mechanism to generate electricity; The control mechanism is configured to: monitor the operating parameters of the hydraulic power mechanism, the power generation mechanism, and the energy storage mechanism in real time, and display the monitored operating parameters; and adjust the hydraulic output of the hydraulic power mechanism and / or the electrical energy storage state of the energy storage mechanism in real time based on the feedback of the operating parameters.

2. The power generation system based on an inertial flywheel according to claim 1, characterized in that, The hydraulic power mechanism includes an AC motor, a hydraulic piston pump, and a hydraulic control valve group connected in sequence. The power range of the AC motor is 30kW to 150kW, and the speed is 1450 rpm; The hydraulic power mechanism is configured to be compatible with an external hydraulic power source.

3. The power generation system based on an inertial flywheel according to claim 2, characterized in that, The power generation mechanism is a permanent magnet generator with a rated power range of 50kW to 3MW.

4. The power generation system based on an inertial flywheel according to claim 3, characterized in that, The hydraulic motor outputs a torque range of 1600 Nm to 30000 Nm and a speed range of 150 rpm to 2000 rpm.

5. The power generation system based on an inertial flywheel according to claim 1, characterized in that, The diameter of the inertial flywheel is 1.2 meters to 2.6 meters; The flywheel shaft has a diameter of 200 mm to 500 mm.

6. The power generation system based on an inertial flywheel according to claim 1, characterized in that, The energy storage mechanism is an energy storage cabinet with a capacity of 100AH ​​to 2000AH.

7. The power generation system based on an inertial flywheel according to claim 6, characterized in that, The output end of the energy storage cabinet is connected to the load end and simultaneously supplies power to the electrical equipment of the power generation system itself.

8. The power generation system based on an inertial flywheel according to claim 1, characterized in that, The control mechanism includes a sensor unit and a control panel; The sensor units are installed in each mechanism and are used to collect hydraulic pressure, flow rate, rotational speed, voltage, current and battery state of charge parameters. The control panel is mounted on the hydraulic power mechanism and is used to display the operating parameters collected by the sensor unit in real time.

9. The power generation system based on an inertial flywheel according to claim 8, characterized in that, The control panel is specifically configured to generate an adjustment signal to control the hydraulic power mechanism based on fluctuations in the output voltage or frequency of the power generation mechanism, so as to stabilize the rotational speed of the inertial flywheel mechanism. And / or adjust the output power distribution of the power generation mechanism according to the remaining power of the energy storage mechanism.

10. The power generation system based on an inertial flywheel according to any one of claims 1-9, characterized in that, The system is applicable to the hydraulic system of engineering machinery to form a mobile power generation device, or to be used as a small distributed power supply system or emergency power supply equipment.

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