Energy-saving flywheel energy storage device heat dissipation system

Abstract

This invention discloses an energy-saving flywheel energy storage device heat dissipation system, belonging to the technical field of flywheel energy storage systems. It is configured to cool and remove heat from the flywheel body inside the flywheel energy storage device. The flywheel body has rotating shafts on both sides. The system includes: a ring-shaped assembly mounted on the rotating shafts; and a mounting box rotatably connected to the flywheel body via the rotating shafts. One side of the mounting box has an air inlet, and the other side has an air outlet. A cooling fan is located on one side of the air inlet; an airflow channel is formed between the air inlet and the air outlet. This invention effectively removes the heat generated by the high-speed rotation of the flywheel body through the cooling fan, air inlet, ring-shaped assembly, heat sink, and air outlet, avoiding potential safety hazards caused by overheating of the flywheel body.

Description

Technical Field

[0001] This invention belongs to the field of flywheel energy storage system technology, and specifically relates to a heat dissipation system for an energy-saving flywheel energy storage device. Background Technology

[0002] Flywheel energy storage, as a highly efficient mechanical energy storage technology, relies on a high-speed rotating body driven by an electric motor. During the energy storage phase, the motor drives a flywheel made of high-strength materials (such as carbon fiber composites) to rotate at high speed, converting electrical energy into kinetic energy for storage. During the energy release phase, the high-speed rotating flywheel, due to inertia, drives a generator to rotate in the opposite direction, converting the kinetic energy back into electrical energy for output. It features fast response speed (milliseconds to seconds), long charge-discharge cycle life (tens of thousands to hundreds of thousands of times), high energy conversion efficiency (typically 85%-95%), and strong environmental adaptability. It is mainly used in scenarios such as grid frequency regulation and peak shaving, new energy grid connection stability, data center backup power, and rail transit energy recovery.

[0003] The existing Chinese patent publication number CN220985464U discloses a flywheel energy storage device with good heat dissipation performance. It includes a base with a vacuum chamber inside, a device frame inside the vacuum chamber, and a rotor rotatably connected to the device frame. The base has an air inlet chamber and an exhaust chamber. The rotor has heat dissipation channels along its axis. One end of each heat dissipation channel connects to the air inlet chamber via an air inlet pipe, and the other end connects to the exhaust chamber via an exhaust pipe. Both the air inlet and exhaust pipes have rotary joints. The base has an air inlet and an exhaust outlet, and a fan is located at the air inlet. When the fan is activated, air is continuously pumped into the air inlet chamber, increasing the air pressure. This causes the air to pass through the heat dissipation channels into the lower-pressure exhaust chamber, and finally exit through the exhaust outlet. As the air flows through the heat dissipation channels, it exchanges heat with the rotor, and the continuously flowing air carries away the rotor's heat.

[0004] However, the liquid cooling structure in this technology is cumbersome and has low heat radiation efficiency. It requires additional components such as a cooler, water tank, and water supply pipes, as well as a detection and control circuit including a sensing module, a comparison module, and a control module. This increases the difficulty of installation and maintenance, occupies a large installation space, and the continuous operation of the water pump to pump cooling water, the start-up of the cooler to cool down, and the continuous operation of the detection and control circuit will significantly increase the energy consumption of the entire energy storage system. In long-term operation scenarios, the additional energy consumption will significantly increase the operating cost. Summary of the Invention

[0005] To address the problems existing in the prior art, the purpose of this invention is to provide an energy-saving flywheel energy storage device heat dissipation system that uses a relatively simple structure to dissipate heat from the flywheel energy storage device, thereby avoiding potential safety hazards caused by overheating of the flywheel body.

[0006] To solve the above-mentioned technical problems, the present invention is implemented as follows: This invention provides an energy-saving flywheel energy storage device heat dissipation system, configured to cool and remove heat from the flywheel body inside the flywheel energy storage device. The flywheel body has rotating shafts on both sides. The system includes: A ring assembly, the ring assembly being mounted on a rotating shaft; The mounting box is rotatably connected to the flywheel body via the rotating shaft. One side of the mounting box has an air inlet, and the other side has an air outlet. A cooling fan is provided on one side of the air inlet. An air circulation channel is formed between the air inlet and the air outlet, which helps to remove heat from inside the mounting box.

[0007] Preferably, it further includes: a heat sink, which is disposed on the annular component and exchanges heat with the air blown into the mounting box by the cooling fan through the air inlet, so as to cool the temperature of the flywheel body after high-speed rotation.

[0008] Preferably, the heat sink has a through-hole ventilation opening, which helps to improve heat dissipation efficiency.

[0009] Preferably, the annular assembly includes a first annular sleeve and a second annular sleeve that fits into the first annular sleeve, with a gap between the first annular sleeve and the second annular sleeve to avoid friction between the first annular sleeve and the second annular sleeve during rotation.

[0010] Preferably, an annular groove structure is provided between the first annular sleeve and the second annular sleeve, and a thermally conductive rolling element is provided in the annular groove structure, which is conducive to the gradual transfer of heat away from the flywheel body.

[0011] Preferably, the rolling element is a columnar structure. Compared with the traditional spherical structure, the cross-section of the columnar structure is rectangular, which is larger than the circle of the spherical structure. This increases the contact area between the first annular sleeve and the second annular sleeve, which is beneficial to improving heat transfer efficiency.

[0012] Preferably, the inner side of the mounting box is provided with a support frame, which is connected to the second annular sleeve in the form of a snap-fit, sleeve, or abutment, thus providing a certain support function.

[0013] Preferably, the number of the support frame and the number of the annular components are the same, which helps to form a smooth heat dissipation channel for heat dissipation.

[0014] Preferably, the support frame is provided with a through-hole ventilation slot to increase heat dissipation efficiency.

[0015] Preferably, the air inlet and / or outlet are equipped with filters, which helps to filter impurities in the air blown into the mounting box and prevent them from affecting the operation of the components inside the mounting box.

[0016] Compared with existing technologies, the above technical solution has at least the following advantages: It adopts a simpler structural design for heat dissipation, reducing production costs. It only uses basic components such as mounting box, shaft, ring sleeve, heat sink, and cooling fan to achieve heat dissipation, eliminating the need for additional complex supporting components such as cooler, water tank, and detection and control circuit. This solves the problems of complex structure, difficult installation and maintenance, and large space occupation of existing devices. At the same time, it relies on the cooling fan to drive airflow to complete heat dissipation, eliminating the need for continuously high-energy-consuming components such as water pump and cooler. This significantly reduces the additional energy consumption of the entire energy storage system and solves the problem of significantly increased long-term operating costs due to additional energy consumption in existing devices. While ensuring heat dissipation effect, it achieves structural simplification and energy-saving operation. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the main structure of a heat dissipation system for an energy-saving flywheel energy storage device; Figure 2 This is a schematic diagram of the internal structure of the mounting box in the heat dissipation system of an energy-saving flywheel energy storage device; Figure 3 This is a schematic diagram of the front cross-sectional structure of the mounting box in the heat dissipation system of an energy-saving flywheel energy storage device; Figure 4 This is a schematic diagram of the flywheel body structure in a heat dissipation system of an energy-saving flywheel energy storage device; Figure 5 This is a schematic diagram of the support frame and the second annular sleeve structure in the heat dissipation system of an energy-saving flywheel energy storage device.

[0018] Reference numerals: 1-Mounting box; 11-Cooling fan; 12-Air inlet; 13-Air outlet; 14-Filter screen; 2-Flywheel body; 21-Shaft; 22-Support frame; 23-First annular sleeve; 24-Second annular sleeve; 3-Heat sink; 31-Groove; 32-Roller; 33-Ventilation opening; 34-Ventilation slot. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0020] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.

[0021] This invention provides a heat dissipation system for an energy-saving flywheel energy storage device, configured to cool and remove heat from the flywheel body 2 inside the energy-saving flywheel energy storage device. The flywheel body 2 can be made of carbon fiber composite material, which has high strength and low density, and can meet the requirements of high-speed rotation energy storage. The flywheel body 2 is provided with rotating shafts 21 on both sides. The rotating shafts 21 can be made of high-strength aluminum alloy (model 6061-T6). While ensuring excellent mechanical properties and stable support for the rotation of the flywheel body 2, this material has a density much lower than that of traditional steel, which can effectively control the weight of the rotating shafts 21 themselves, avoid increasing the rotational load of the flywheel body 2 due to excessive weight of the rotating shafts 21, and reduce the energy consumption loss of the energy storage system. See Figures 1-5 The heat dissipation system of the energy-saving flywheel energy storage device includes: a mounting box 1, and a flywheel body 2 is set inside the mounting box 1 and rotated in the mounting box 1 through a rotating shaft 21 to ensure that the flywheel body 2 can stably realize the conversion of kinetic energy and electrical energy; the mounting box 1 can be made of 316 or 304 stainless steel, preferably 304 stainless steel, which has good structural strength and corrosion resistance. The rotating shaft 21 is provided with an annular assembly, which is at least one. In this embodiment, there are two annular assemblies, which are used to dissipate the heat generated after the flywheel body 2 rotates at high speed. Therefore, the material of the annular assembly is selected to have a high thermal conductivity, that is, a material with good thermal conductivity. In this embodiment, the annular assembly includes a first annular sleeve 23 and a second annular sleeve 24. The first annular sleeve 23 is fixedly mounted on the rotating shaft 21, and the first annular sleeve 23 and the second annular sleeve 24 are rotatably connected with a gap between them to avoid friction during rotation. The first annular sleeve 23 can be made of copper, which has a high thermal conductivity and facilitates rapid heat transfer. Correspondingly, the second annular sleeve 24 is also made of copper and works with the first annular sleeve 23 to achieve efficient heat conduction. To improve the stability of the second annular sleeve 24 in the annular assembly, a support frame 22 is fixedly provided at one end of the inner side of the mounting box 1. Corresponding to the number of annular assemblies, there are two support frames 22 in this embodiment. The support frame 22 can be made of aluminum alloy to reduce the overall weight while ensuring the support strength. The fixing method can be welding, etc. The second annular sleeve 24 can be set on the top of the support frame 22. Furthermore, the first annular sleeve 23 can be fitted inside the second annular sleeve 24. A groove 31 is provided between the two annular sleeves. The groove 31 is an annular groove structure that can accommodate rolling elements, which can be balls or rollers 32. Rollers 32 are rolled inside the groove 31. The rollers 32 are preferably columnar in shape. The rollers 32 can be made of GCr15 bearing steel and have good thermal conductivity. This material has good wear resistance and high strength, which can reduce the frictional resistance between the first annular sleeve 23 and the second annular sleeve 24, ensuring the stable rotation of the flywheel body 2. It can also efficiently transfer the heat on the first annular sleeve 23 to the second annular sleeve 24. Compared with conventional spherical balls, the columnar structure of the rollers 32 can significantly increase the contact area with the first annular sleeve 23 and the second annular sleeve 24, further improving the heat transfer efficiency.

[0022] To achieve better heat dissipation, a heat sink 3 is provided on the top of the second annular sleeve 24. The heat sink 3 is made of aluminum alloy, which has good heat dissipation performance and low cost, and can quickly dissipate heat to the surrounding environment. Multiple heat sinks 3 are provided, and the multiple heat sinks 3 are arranged circumferentially along the second annular sleeve 24.

[0023] To better remove heat from the inside of the mounting box 1, at least one air inlet 12 is provided through one side of the mounting box 1. The shape of the air inlet 12 can be elliptical or semi-circular, preferably circular, to facilitate the smooth entry of external air. Correspondingly, an air outlet 13 is provided through the other side of the mounting box, wherein an air circulation channel is formed between the air inlet 12 and the air outlet 13 to ensure timely exhaust of hot air. In this embodiment, there are two air inlets 12 and two air outlets 13, located on the front and rear sides of the mounting box, respectively. A cooling fan 11 is provided on one side of the air inlet 13. The cooling fan 11 is an axial flow fan, model SF-4-4. This model of fan has moderate air volume and low energy consumption, which can meet the heat dissipation requirements. The air blowing direction of the cooling fan 11 is towards the second annular sleeve 24, which is conducive to guiding the airflow to the heat-conducting component and improving the heat exchange efficiency. The heat sink 3 can exchange heat with the air blown into the mounting box 1 by the cooling fan 11 through the air inlet 12.

[0024] To prevent impurities, dust, and other particles carried by the air blown by the cooling fan 11 into the mounting box 1 from affecting the normal operation of the internal components of the mounting box 1, filters 14 are installed inside the air inlet 12 and air inlet 13 respectively. To improve durability, the filter 14 is preferably made of stainless steel wire mesh with a mesh count of 80, so as to effectively filter dust and impurities in the air and prevent them from entering the mounting box 1 and affecting the normal operation of the components.

[0025] To further enhance the heat dissipation effect, a ventilation opening 33 is provided through the heat sink 3. There can be several ventilation openings 33, which are polygonal, preferably circular through holes. In this embodiment, there is one ventilation opening 33, which is evenly distributed on each heat sink 3 to increase the contact area between the air and the heat sink 3 and improve the heat dissipation efficiency. To further enhance heat dissipation, a ventilation slot 34 is provided on the top of the support frame 22. Specifically, the ventilation slot 34 can be installed through the support frame 22. There can be several ventilation slots 34. In this embodiment, the ventilation slot 34 is a rectangular groove that is connected to the air inlet 12 and the air outlet 13, so as to facilitate the smooth flow of air inside the mounting box 1 and ensure the stable operation of the heat exchange process.

[0026] The working principle of the heat dissipation system of the energy-saving flywheel energy storage device of the present invention is as follows: When the flywheel body 2 is working, the heat generated by the flywheel body 2 is transferred to the rotating shafts 21 on both sides. The rotating shafts 21 conduct the heat to the fixedly set first annular sleeve 23. The first annular sleeve 23 contacts the second annular sleeve 24 through the thermally conductive roller 32, which efficiently transfers the heat to the second annular sleeve 24. The second annular sleeve 24 then transfers the heat to the heat sink 3 at the top. At the same time, the cooling fan 11 in front of the air inlet 12 is started. After the external air passes through the filter screen 14 in the air inlet 12 to filter impurities, it enters the mounting box 1. The airflow passes through the ventilation slot 34 at the top of the support frame 22 and blows towards the second annular sleeve 24. It fully contacts the second annular sleeve 24 and the heat sink 3 and exchanges heat. The hot air, after carrying away the heat, passes through the ventilation port 33 on the heat sink 3 and is finally discharged from the air outlet 13 in front of the mounting box 1, forming a continuous heat dissipation cycle to achieve heat dissipation of the flywheel energy storage device.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An energy-saving flywheel energy storage device heat dissipation system, configured to cool and remove heat from the flywheel body inside the flywheel energy storage device, characterized in that, The flywheel body has rotating shafts on both sides, and the system includes: A ring assembly, the ring assembly being mounted on a rotating shaft; The mounting box is rotatably connected to the flywheel body via the rotating shaft. One side of the mounting box is provided with an air inlet, and the other side of the mounting box is provided with an air outlet. A cooling fan is provided on one side of the air inlet; wherein an air circulation channel is formed between the air inlet and the air outlet.

2. The heat dissipation system of the energy-saving flywheel energy storage device according to claim 1, characterized in that, Also includes: A heat sink is disposed on the annular assembly and exchanges heat with the air blown into the mounting box by the cooling fan through the air inlet.

3. The heat dissipation system of the energy-saving flywheel energy storage device according to claim 2, characterized in that, The heat sink has a through-hole ventilation opening.

4. The heat dissipation system of the energy-saving flywheel energy storage device according to claim 1, characterized in that, The ring assembly includes a first ring sleeve and a second ring sleeve that fits into the first ring sleeve, with a gap between the first ring sleeve and the second ring.

5. The heat dissipation system of the energy-saving flywheel energy storage device according to claim 4, characterized in that, An annular groove structure is provided between the first annular sleeve and the second annular sleeve, and a rolling element is provided within the annular groove structure.

6. The heat dissipation system of the energy-saving flywheel energy storage device according to claim 5, characterized in that, The rolling element has a columnar structure.

7. The heat dissipation system of the energy-saving flywheel energy storage device according to claim 4, characterized in that, The mounting box is equipped with a support frame inside, and the support frame is connected to the second annular sleeve.

8. The heat dissipation system of the energy-saving flywheel energy storage device according to claim 7, characterized in that, The number of support frames is the same as the number of ring components.

9. The heat dissipation system of the energy-saving flywheel energy storage device according to claim 7, characterized in that, The support frame is provided with a ventilation slot.

10. The heat dissipation system for the energy-saving flywheel energy storage device according to any one of claims 1-9, characterized in that, The air inlet and / or outlet are equipped with filters.

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