Flywheel energy storage motor with damping system
By introducing radial and axial vibration damping components into the flywheel energy storage motor, the problems of poor bearing concentricity and rapid wear are solved, achieving long bearing life and stable operation, and ensuring the safety of the flywheel energy storage motor.
Patent Information
- Application Number
- CN202522263994.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-27
AI Technical Summary
The existing flywheel energy storage motor bearing vibration reduction system is ineffective, resulting in poor bearing concentricity, rapid wear, short lifespan, large vibration during operation, easy damage, and a lack of effective quality inspection methods.
The flywheel energy storage motor with a vibration damping system embeds radial and axial vibration damping components, including magnetically repulsive magnet components and rubber rings, in a gap space between the bearing and the support housing. Combined with elastic buffers, it forms a non-rigid contact to absorb and dampen vibrations and avoid resonance.
It effectively absorbs and attenuates radial and axial vibrations of the bearing, extends bearing life, improves rotational accuracy and stability, and ensures the safe and stable operation of the flywheel energy storage motor.
Smart Images
Figure CN224684025U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flywheel energy storage motor technology, and in particular to a flywheel energy storage motor with a vibration reduction system. Background Technology
[0002] Bearings are a key component of flywheel energy storage motors, playing a crucial role in supporting the weight of the flywheel rotor, reducing frictional resistance during rotor rotation, minimizing energy consumption and heat generation, and ensuring stable and smooth high-speed rotation of the flywheel rotor. Due to factors such as material inhomogeneity, machining accuracy deviations, and deformation caused by stress and heat during operation, the flywheel rotor experiences vibration during high-speed operation. Simultaneously, the flywheel energy storage motor itself also vibrates at its natural frequency. These vibrations reduce bearing rotational accuracy, induce abnormal noise, accelerate wear, and shorten lifespan, ultimately having a fatal impact on key indicators of the flywheel energy storage motor system, such as charging and discharging efficiency, power consumption, and service life. Current technologies primarily address this by implementing vibration damping systems for the flywheel energy storage motor bearings to attenuate vibration, reduce wear, protect the bearings, and ensure the safe operation of the flywheel energy storage motor system.
[0003] The existing flywheel energy storage motor bearing vibration reduction system is mainly a wire mesh seat structure. This wire mesh seat structure consists of an inner ring, an outer ring, and a metal wire mesh filled between the inner and outer rings. The inner ring of the wire mesh seat is assembled with the flywheel motor bearing by an interference fit, and the outer ring is fixedly installed on the support housing through the bearing seat. The metal wire mesh is used to buffer the vibration between the flywheel motor bearing and the support housing. However, the existing flywheel energy storage motor bearing vibration reduction system with wire mesh seat structure still has problems such as poor concentricity of the upper and lower bearings, fast wear, short life, large vibration and easy damage during operation. The main reasons are: (1) the metal wire mesh filling and compaction are uneven, resulting in inconsistent support force in the circumferential direction of the wire mesh seat; (2) after the metal wire mesh filling and compaction, the inner and outer rings are easy to deform and have poor concentricity; (3) during the high-speed operation of the flywheel energy storage motor, the inner and outer rings are easy to loosen, causing damage to the bearings and equipment; (4) the metal wire mesh filling and compaction process is uncontrollable, the product consistency is poor, and the quality is unstable; (5) there are no effective inspection methods and inspection standards for the wire mesh seat structure to judge whether the quality is qualified. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of existing flywheel energy storage motors, such as poor bearing vibration damping systems that affect the safe and stable operation of the flywheel energy storage motors, and to provide a flywheel energy storage motor with a vibration damping system.
[0005] This utility model provides a flywheel energy storage motor with a vibration damping system, including a support housing and a flywheel rotor. A bearing and a bearing mounting seat are mounted on the flywheel rotor. The bearing mounting seat is positioned with the support housing by a stop. A gap space is formed between the bearing and the bearing mounting seat, surrounding the flywheel rotor. A radial vibration damping component is embedded in the gap space. A first axial vibration damping component is provided between the axial end face of the flywheel rotor and the bearing housing. The axial end face of the bearing abuts against a second axial vibration damping component.
[0006] Preferably, the first axial vibration damping assembly includes a first magnet component and a second magnet component that are magnetically repulsive. The first magnet component is embedded in the axial end face of the flywheel rotor, and the second magnet component is embedded in the support housing. The first magnet component and the second magnet component are axially opposite to each other.
[0007] Preferably, the first magnet component includes an annular component, which is coaxially arranged with the flywheel rotor, and the second magnet component is correspondingly arranged with the first magnet component.
[0008] Preferably, at least two of the ring-shaped components are nested together.
[0009] Preferably, the bearing mounting base is provided with a mounting hole, and the mounting hole is provided with an annular groove. The radial vibration damping component is nested with the annular groove, and at least two annular grooves are arranged at intervals. The radial vibration damping component includes a rubber ring.
[0010] Preferably, the second axial vibration damping assembly includes a positioning end cap and an elastic buffer, the positioning end cap being detachably connected to the bearing mounting seat, and an adjusting shim being provided between the positioning end cap and the bearing mounting seat.
[0011] Preferably, the elastic buffer includes a disc spring.
[0012] Preferably, the radial damping component and the second axial damping component are disposed on the top end side of the flywheel rotor, and the radial damping component, the first axial damping component and the second axial damping component are disposed on the bottom end side of the flywheel rotor.
[0013] Preferably, a limiting plate is embedded between the bearing mounting base and the support housing. The limiting plate is detachably connected to the bearing mounting base. The limiting plate is provided with a pressing surface adapted to the flywheel rotor. The pressing surface is an inclined surface relative to the axis of the flywheel rotor.
[0014] Preferably, the system further includes a vibration sensor and a temperature sensor, wherein the vibration sensor abuts against the side wall of the bearing mounting seat, and the temperature sensor extends into the gap space.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a flywheel energy storage motor with a vibration damping system, which forms a gap space by positioning and installing the bearing mounting seat and the support housing, so that the bearing and the support housing form a non-rigid contact; 2. This utility model provides a flywheel energy storage motor with a vibration damping system, which absorbs and attenuates the radial vibration of the bearing during the high-speed operation of the flywheel rotor through a radial vibration damping component; 3. This utility model provides a flywheel energy storage motor with a vibration damping system. The first axial vibration damping component absorbs and attenuates the axial vibration of the bearing during the high-speed operation of the flywheel rotor, reduces the friction force on the bearing, and extends the service life of the bearing. 4. This utility model provides a flywheel energy storage motor with a vibration damping system. By combining various vibration damping structures, the vibration of the flywheel rotor is prevented from being transmitted to the support housing and causing resonance, thus ensuring the safe and stable operation of the flywheel energy storage motor. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the external structure of a flywheel energy storage motor with a vibration damping system, as shown in Example 1.
[0017] Figure 2 This is a top view of a flywheel energy storage motor with a vibration damping system according to Embodiment 1.
[0018] Figure 3 for Figure 2 A schematic diagram of the NN cross-section.
[0019] Figure 4 for Figure 3 A magnified structural diagram of part A in the middle.
[0020] Figure 5 for Figure 3 A magnified structural diagram of section B in the middle.
[0021] Figure 6 for Figure 2 A schematic diagram of the structure of the MM cross section.
[0022] Figure 7 for Figure 6 A magnified structural diagram of section C in the middle.
[0023] Figure 8 for Figure 6 A magnified structural diagram of part D in the middle.
[0024] Marked in the image: 1-Support housing, 2-Flywheel rotor, 3-Bearing, 4-Bearing mounting base, 41-Mounting hole, 42-Annular groove, 5-Radial vibration damping assembly, 6-First axial vibration damping assembly, 61-First magnet component, 62-Second magnet component, 7-Second axial vibration damping assembly, 71-Positioning end cap, 72-Elastic buffer, 73-Adjusting shim. 8-Limiting plate, 81-Crimping surface, 9-Vibration sensor, 10-Temperature sensor. Detailed Implementation
[0025] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.
[0026] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer" used in the description of specific embodiments of this utility model to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.
[0027] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.
[0028] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.
[0029] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.
[0030] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.
[0031] Example 1 like Figures 1-8 As shown, this embodiment provides a flywheel energy storage motor with a vibration damping system, including a support housing 1, a flywheel rotor 2, a bearing mounting base 4, a bearing 3, and a positioning end cover 71.
[0032] like Figures 1-3 As shown, the support housing 1 is the outer shell structure of the flywheel energy storage motor. The support housing 1 includes a cylindrical shell surrounding the flywheel rotor 2 and end plates for closing both ends of the cylindrical shell. The flywheel rotor 2 is coaxially rotatable with the support housing 1. Bearing mounting seats 4 are respectively provided between the flywheel rotor 2 and the two end plates. The bearing mounting seats 4 are fitted on the flywheel rotor 2 and bolted to the support housing 1. The bearing mounting seats 4 are provided with mounting holes 41. The bearing 3 is fitted on the flywheel rotor 2 and embedded in the mounting holes 41. The positioning end cap 71 is bolted to the bearing mounting seat 4 and extends into the mounting holes 41. The positioning end cap 71 restricts the bearing 3 in the mounting holes 41.
[0033] In one or more implementations, such as Figures 3-8As shown, the bearing mounting base 4 and the support housing 1 are positioned by a stop, forming a gap space around the flywheel rotor 2 between the bearing 3 and the bearing mounting base 4. A radial vibration damping component 5 is embedded in this gap space. The stop positioning stabilizes and limits the relative position of the bearing mounting base 4 and the support housing 1, preventing radial movement between them and creating a stable gap space. This achieves a non-rigid connection between the bearing 3 and the bearing mounting base 4 and provides a location for the radial vibration damping component 5. The radial vibration damping component 5 absorbs and attenuates the radial vibration of the bearing 3 during the high-speed operation of the flywheel rotor 2, and the stop positioning ensures the concentric arrangement of the two bearings 3 in the axial direction of the flywheel rotor 2.
[0034] In an optional embodiment, the stop positioning can be achieved by setting concave and convex ribs at the relative positions of the bearing mounting seat 4 and the support housing 1 for mating positioning.
[0035] In an optional embodiment, the radial vibration damping component 5 can be a rubber ring. At least two rubber rings are spaced apart along the axial direction of the flywheel rotor 2. The width of the gap space is smaller than the diameter of the rubber ring, so that the rubber ring is compressed and set in the gap space, and stably abuts against the mounting hole 41 and the bearing 3, thereby playing a radial vibration damping role for the bearing 3.
[0036] In an optional embodiment, an annular groove 42 can be provided on the inner wall of the mounting hole 41, and the rubber ring can be embedded in the annular groove 42 to ensure the stable setting of the rubber ring and prevent the rubber ring from shifting during the rotation of the flywheel rotor 2.
[0037] In one or more embodiments, a first axial vibration damping assembly 6 is provided between the axial end face of the flywheel rotor 2 and the bearing housing 3. The first axial vibration damping assembly 6 includes a first magnet component 61 and a second magnet component 62 with magnetic repulsion. The first magnet component 61 is embedded in the axial end face of the flywheel rotor 2, and the second magnet component 62 is embedded in the support housing 1. The first magnet component 61 and the second magnet component 62 are axially opposite to each other. By forming a suspension assembly with the first magnet component 61 and the second magnet component 62, the axial force borne by the bearing 3 during the rotation of the flywheel rotor 2 is reduced, so that the bearing 3 is in an ideal operating state, reducing the wear of the bearing 3, improving the rotational accuracy and stability of the bearing 3, extending the life of the bearing 3, and preventing the vibration of the flywheel rotor from being transmitted to the support housing 1 and causing resonance.
[0038] In an optional embodiment, the first magnet component 61 may be an annular component, which is coaxially arranged with the flywheel rotor 2, and the second magnet component 62 is arranged corresponding to the first magnet component 61 along the axial direction of the flywheel rotor 2.
[0039] In an optional embodiment, the first magnet component 61 may be a combination of two, three or more nested annular components. The first magnet component 61 may be embedded in the axial end face of the flywheel rotor 2. The second magnet component 62 has the same number and shape as the first magnet component 61. The second magnet component 62 is embedded in the support housing 1 to achieve stable setting of the first magnet component 61 and the second magnet component 62. The relative distance between the first magnet component 61 and the second magnet component 62 is stabilized by the relative position of the flywheel rotor 2 and the support housing 1 to provide a stable vibration reduction effect.
[0040] In an optional embodiment, the first magnet component 61 can be an integral ring or composed of several arc segments. The size and performance grade of the first magnet component 61 and the second magnet component 62 can be designed according to the weight of the flywheel rotor 2.
[0041] In one or more embodiments, the axial end face of the bearing 3 can abut against the second axial damping assembly 7. The second axial damping assembly 7 includes a positioning end cap 71 and an elastic buffer 72. An adjusting shim 73 can be provided between the positioning end cap 71 and the bearing mounting seat 4. The elasticity of the elastic buffer 72 provides axial damping for the bearing 3, and the abutment between the positioning end cap 71 and the elastic buffer 72 stably confines the bearing 3 within the mounting hole 41. The thickness of the space used to set the elastic buffer 72 can be changed by increasing or decreasing the number or thickness of the adjusting shims 73, thereby adjusting the clamping force of the elastic buffer 72.
[0042] In an optional embodiment, the elastic buffer 72 can be a disc spring. The disc spring is set in the same direction, opposite direction, or mixed same and opposite direction according to the compression stroke and clamping force, so that the disc spring plays the role of axial vibration reduction of the bearing 3 after being compressed.
[0043] In one or more embodiments, when the flywheel rotor 2 is vertically positioned, a radial damping component 5 and a second axial damping component 7 can be provided on the top side of the flywheel rotor 2, and a radial damping component 5, a first axial damping component 6, and a second axial damping component 7 can be provided on the bottom side of the flywheel rotor 2. This ensures that the magnetic levitation component of the first axial damping component 6 is only provided on the bottom surface of the flywheel rotor 2, so that when the flywheel rotor 2 is running, the bearing 3 will not bear the axial force generated by the gravity of the flywheel rotor 2. Combined with the second axial damping component 7 of the disc spring, the axial vibration generated by the flywheel rotating body during high-speed rotation is absorbed and attenuated by the elastic force of the disc spring, and the suspension repulsive force of the flywheel rotor 2 is balanced and stabilized by the elastic force of the disc spring, making the flywheel rotor 2 rotate more smoothly and ensuring that the flywheel rotor 2 is in an ideal rotation state.
[0044] In one or more implementations, such as Figure 4As shown, a limiting plate 8 is embedded between the bearing mounting base 4 and the support housing 1. The limiting plate 8 is detachably connected to the bearing mounting base 4. The limiting plate 8 is provided with a pressing surface 81 adapted to the flywheel rotor 2. The pressing surface 81 is an inclined surface relative to the axial direction of the flywheel rotor 2. The limiting plate 8 is used to restrict the flywheel rotor 2 within the support housing 1, reduce the amount of axial movement of the flywheel rotor 2 during rotation, and thus reduce the axial force that the bearing 3 may bear. By forming an inclined pressing surface 81, the pressing surface 81 can be inclined from top to bottom along the axial direction of the flywheel rotor 2, providing restriction on the flywheel rotor 2 towards the inner cavity of the support housing 1.
[0045] In one or more embodiments, the flywheel energy storage motor of this embodiment may also be equipped with a vibration sensor 9 and a temperature sensor 10. The vibration sensor 9 abuts against the side wall of the bearing mounting seat 4, and the temperature sensor 10 extends into the gap space. The vibration sensor 9 and the temperature sensor 10 can collect and monitor the vibration and operating temperature of the bearing 3, so as to realize the monitoring of the operating status of the flywheel energy storage motor through an adapted control system. When the vibration value or temperature value reaches the set alarm value or shutdown value, an alarm or shutdown command can be issued in a timely manner to actively protect the safe operation of the flywheel energy storage motor system.
[0046] In an optional embodiment, the vibration sensor 9 can be fixed to the side wall of the bearing mounting base 4 by magnetic force or threaded connection, and collect the vibration of the bearing 3 in real time and feed it back to the control system; the temperature sensor 10 can be inserted into the mounting hole 41 through the hole provided on the bearing mounting base 4, and fixed by adhesive, with the temperature probe closely attached to the outer ring of the bearing 3, and collect the temperature of the bearing 3 in real time and feed it back to the control system.
[0047] This embodiment of a flywheel energy storage motor with a vibration damping system creates a gap space between the bearing mounting seat 4 and the support housing 1, allowing the bearing 3 to form a non-rigid contact with the support housing 1. The radial vibration damping component 5 absorbs and attenuates the radial vibration of the bearing 3 during the high-speed operation of the flywheel rotor 2, while the first axial vibration damping component 6 absorbs and attenuates the axial vibration of the bearing 3 during the high-speed operation of the flywheel rotor 2, reducing the frictional force on the bearing 3 and extending its service life. The second axial vibration damping component 7 forms a magnetic levitation component, reducing the axial force generated by the gravity of the flywheel rotor 2 on the bearing 3. Through the combination of multiple vibration damping structures, each structure works in conjunction to keep the bearing 3 in an ideal operating state, reducing wear, improving the rotational accuracy and stability of the bearing 3, extending its service life, and preventing the vibration of the flywheel rotating body from being transmitted to the support housing 1 and causing resonance, thus ensuring the safe and stable operation of the flywheel energy storage motor.
[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A flywheel energy storage motor with a vibration damping system, characterized in that, The device includes a support housing (1) and a flywheel rotor (2). A bearing (3) and a bearing mounting seat (4) are mounted on the flywheel rotor (2). The bearing mounting seat (4) is positioned with the support housing (1) at a stop. A gap space is formed between the bearing (3) and the bearing mounting seat (4) surrounding the flywheel rotor (2). A radial vibration damping component (5) is embedded in the gap space. A first axial vibration damping component (6) is provided between the axial end face of the flywheel rotor (2) and the bearing (3). The axial end face of the bearing (3) abuts against a second axial vibration damping component (7).
2. The flywheel energy storage motor with a vibration damping system according to claim 1, characterized in that, The first axial vibration damping assembly (6) includes a first magnet component (61) and a second magnet component (62) that are magnetically repulsive. The first magnet component (61) is embedded in the axial end face of the flywheel rotor (2), and the second magnet component (62) is embedded in the support housing (1). The first magnet component (61) and the second magnet component (62) are axially opposite to each other.
3. A flywheel energy storage motor with a vibration damping system according to claim 2, characterized in that, The first magnet component (61) includes an annular component, which is coaxially arranged with the flywheel rotor (2), and the second magnet component (62) is arranged correspondingly to the first magnet component (61).
4. A flywheel energy storage motor with a vibration damping system according to claim 3, characterized in that, At least two of the aforementioned annular components are nested together.
5. A flywheel energy storage motor with a vibration damping system according to claim 2, characterized in that, The bearing mounting base (4) is provided with a mounting hole (41), and an annular groove (42) is provided in the mounting hole (41). The radial vibration damping component (5) is nested with the annular groove (42), and at least two annular grooves (42) are arranged at intervals. The radial vibration damping component (5) includes a rubber ring.
6. A flywheel energy storage motor with a vibration damping system according to claim 2, characterized in that, The second axial vibration damping assembly (7) includes a positioning end cap (71) and an elastic buffer (72). The positioning end cap (71) is detachably connected to the bearing mounting seat (4), and an adjustment shim (73) is provided between the positioning end cap (71) and the bearing mounting seat (4).
7. A flywheel energy storage motor with a vibration damping system according to claim 6, characterized in that, The elastic buffer (72) includes a disc spring.
8. A flywheel energy storage motor with a vibration damping system according to claim 7, characterized in that, The radial damping component (5) and the second axial damping component (7) are provided on the top side of the flywheel rotor (2), and the radial damping component (5), the first axial damping component (6) and the second axial damping component (7) are provided on the bottom side of the flywheel rotor (2).
9. A flywheel energy storage motor with a vibration damping system according to any one of claims 1-8, characterized in that, A limiting plate (8) is embedded between the bearing mounting base (4) and the support housing (1). The limiting plate (8) is detachably connected to the bearing mounting base (4). The limiting plate (8) is provided with a pressing surface (81) adapted to the flywheel rotor (2). The pressing surface (81) is an inclined surface relative to the axial direction of the flywheel rotor (2).
10. A flywheel energy storage motor with a vibration damping system according to claim 9, characterized in that, It also includes a vibration sensor (9) and a temperature sensor (10), the vibration sensor (9) abutting against the side wall of the bearing mounting seat (4), and the temperature sensor (10) extending into the gap space.