Flywheel energy storage device

Abstract

The present invention discloses a flywheel energy storage device, which includes: a housing; a rotor, which is arranged in the housing; a magnetic suspension bearing, which is installed in the housing, and the magnetic suspension bearing is provided with a first through hole, and the rotor is provided in the first through hole; an axial force lifting device, which is installed in the housing, and the axial force lifting device includes: a skeleton and an electromagnetic coil, the electromagnetic coil is wound in the skeleton, the skeleton is provided with a second through hole, and the magnetic suspension bearing is installed in the second through hole. In this way, the axial force on the rotor can be controlled, so that the rotor can be ensured to be always in a stable operating position, and the universality and interchangeability of the magnetic suspension bearing can be made stronger, the same type of magnetic suspension bearing has a wider range of use, more precise control, and real-time regulation and control. By adjusting the number of electromagnetic coils, the range of magnetic field force can be adjusted, and the universality of the magnetic suspension bearing can be further improved.

Description

Technical Field

[0001] The invention relates to the technical field of rotors, and in particular to a flywheel energy storage device. Background Art

[0002] In the prior art, a rotor of one model in a flywheel energy storage device generally uses the same magnetic bearing. Different magnetic bearings need to be designed separately according to the different rotor structures and weights. This increases the difficulty of design and processing, and also has problems such as poor interchangeability and versatility and high cost. Moreover, it is impossible to control the axial force on the rotor, resulting in unstable force on the rotor during operation. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to propose a flywheel energy storage device, which can control the axial force of the magnetic suspension bearing and the axial force exerted on the rotor, so as to ensure that the rotor is always in a stable operating position, and can also make the magnetic suspension bearing more versatile and interchangeable, and the same type of magnetic suspension bearing has a wider range of uses, more precise control, and real-time regulation. By adjusting the number of electromagnetic coils, the range of the magnetic field force can be adjusted, and the versatility of the magnetic suspension bearing can be further improved.

[0004] According to the flywheel energy storage device of the present invention, it includes: a shell; a rotor, the rotor is arranged in the shell; a magnetic bearing, the magnetic bearing is installed in the shell, the magnetic bearing is provided with a first through hole, and the rotor is passed through the first through hole; an axial force lifting device, the axial force lifting device is installed in the shell, the axial force lifting device includes: a frame and an electromagnetic coil, the electromagnetic coil is wound in the frame, the frame is provided with a second through hole, and the magnetic bearing is installed in the second through hole.

[0005] Therefore, the flywheel energy storage device can control the axial force of the magnetic bearing and the axial force exerted on the rotor, thereby ensuring that the rotor is always in a stable operating position. It can also make the magnetic bearing more versatile and interchangeable. The same type of magnetic bearings can be used in a wider range of applications, with more precise control and real-time regulation. By adjusting the number of electromagnetic coils, the range of the magnetic field force can be adjusted, and the versatility of the magnetic bearing can be further improved.

[0006] Furthermore, the skeleton includes: an inner ring, the inner circumference of which is provided with the second through hole; an end plate, the end plate is respectively connected to both ends of the inner ring, the end plate and the inner ring jointly form a winding groove, and the electromagnetic coil is wound in the winding groove.

[0007] Furthermore, the electromagnetic coil includes a plurality of turns of conductor coils; the axial force enhancement device further includes: an insulating medium, the insulating medium fills the winding groove and insulates and separates two adjacent turns of the conductor coils.

[0008] Furthermore, the axial force enhancement device further comprises: an insulating sleeve, wherein the insulating sleeve is sleeved on the outside of the electromagnetic coil and the insulating medium.

[0009] Furthermore, the axial force lifting device also includes: a first lead and a second lead, the end plate is formed with a third through hole, the first lead and the second lead pass through the third through hole and are respectively connected to the two ends of the electromagnetic coil, and the first lead and the second lead are used to connect to a power source.

[0010] Furthermore, the first lead wire and the second lead wire each include: a wire body, the wire body is connected to the electromagnetic coil; and a sheath, the sheath is sleeved on the wire body.

[0011] Furthermore, the inner ring and the magnetic bearing are interference fit.

[0012] Furthermore, the axial force enhancement device further comprises: a magnetically conductive mounting plate, the magnetically conductive mounting plate is connected to the skeleton, the magnetically conductive mounting plate is mounted on the shell, and the skeleton and the shell are gap-fitted.

[0013] Furthermore, a size of the magnetic bearing in the axial direction of the rotor is smaller than a size of the skeleton in the axial direction of the rotor.

[0014] Furthermore, the frame is an integrally formed insulating frame.

[0015] The flywheel energy storage device can change the axial electromagnetic force exerted on the magnetic bearing through the axial force lifting device, thereby controlling the axial force exerted on the rotor, ensuring that the rotor is always in a stable operating position, and controlling the axial force of different rotors in the same type of magnetic bearing structure, thereby making the magnetic bearing more versatile and interchangeable.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic structural diagram of a flywheel energy storage device according to an embodiment of the present invention;

[0019] Figure 2 is along Figure 1 Sectional view in the AA direction;

[0020] Figure 3 is a schematic structural diagram of a skeleton according to an embodiment of the present invention;

[0021] Figure 4 is along Figure 3 Cross-sectional view in the BB direction;

[0022] Figure 5 yes Figure 4 Enlarged view of middle area C;

[0023] Figure 6 is a schematic diagram of a structure in which a first lead and a second lead are passed through a third through hole according to an embodiment of the present invention;

[0024] Figure 7 is along Figure 6 Cross-sectional view along the DD direction.

[0025] Reference numerals:

[0026] 100. Flywheel energy storage device;

[0027] 10. Shell;

[0028] 20. Rotor;

[0029] 30. Magnetic bearing; 31. First perforation;

[0030] 40. Axial force lifting device;

[0031] 41. frame; 411. inner ring; 412. end plate; 413. third through hole;

[0032] 42. electromagnetic coil; 43. second through hole; 44. winding groove;

[0033] 50. Insulating medium;

[0034] 60. first lead wire; 61. second lead wire;

[0035] 70. Insulating sleeve. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0037] Reference below Figure 1-Figure 7 A flywheel energy storage device 100 according to an embodiment of the present invention is described.

[0038] like Figure 1-Figure 4As shown, the flywheel energy storage device 100 according to an embodiment of the present invention includes: a shell 10, a rotor 20, a magnetic bearing 30 and an axial force lifting device 40, the rotor 20 is arranged in the shell 10, the magnetic bearing 30 is installed in the shell 10, the magnetic bearing 30 is provided with a first through hole 31, the rotor 20 is penetrated in the first through hole 31, the axial force lifting device 40 is installed in the shell 10, and the axial force lifting device 40 includes: a skeleton 41 and an electromagnetic coil 42, the electromagnetic coil 42 is wound in the skeleton 41, the skeleton 41 is provided with a second through hole 43, and the magnetic bearing 30 is installed in the second through hole 43.

[0039] Specifically, in traditional flywheel energy storage devices, the same rotor generally uses the same magnetic bearing, and different magnetic bearings need to be designed separately according to the different rotor structures and weights. This increases the difficulty of design and processing, and also has problems such as poor interchangeability and versatility and high cost. Moreover, it is impossible to control the axial force on the rotor.

[0040] Therefore, it is necessary to optimize the design of the flywheel energy storage device 100, in which the rotor 20 and the magnetic bearing 30 are both installed in the housing 10, and the housing 10 can protect the rotor 20 and the magnetic bearing 30. The magnetic bearing 30 is provided with a first through hole 31, which can facilitate the installation of the rotor 20, thereby providing an installation space for the rotor 20.

[0041] In addition, the axial force enhancement device 40 is installed in the housing 10, and the electromagnetic coil 42 in the axial force enhancement device 40 is wound in the frame 41. In this way, the axial force enhancement device 40 can provide an axial electromagnetic force to the magnetic suspension bearing 30 fixed on the same housing 10. The current passes through the electromagnetic coil 42 to generate an induced magnetic field. By adjusting the current to provide the strength of the magnetic field force, the axial force of the magnetic suspension bearing 30 can be controlled. Since the rotor 20 is inserted into the first through hole 31 of the magnetic suspension bearing 30, the axial force on the rotor 20 can be controlled, and the rotor 20 can also be ensured to be always in a stable operating position.

[0042] Moreover, the electromagnetic coil 42 in the skeleton 41 utilizes magnetic field induction to generate electromagnetic force, and the electromagnetic force can enhance the axial force of the magnetic bearing 30, thereby being able to control the axial force of different rotors 20 in the same model of magnetic bearing 30 structure. In this way, the axial force enhancing device 40 and the magnetic bearing 30 cooperate with each other, which can make the magnetic bearing 30 more versatile and interchangeable. The axial force exerted on the magnetic bearing 30 can also be changed by adjusting the number of electromagnetic coils 42 and the range of magnetic field force, thereby further improving the versatility of the magnetic bearing 30.

[0043] Therefore, the flywheel energy storage device 100 can control the axial force of the magnetic bearing 30, and can also control the axial force exerted on the rotor 20, so as to ensure that the rotor 20 is always in a stable operating position, and can also make the magnetic bearing 30 more versatile and interchangeable. The same type of magnetic bearings can be used in a wider range of applications, with more precise control and real-time regulation. By adjusting the number of electromagnetic coils 42, the range of the magnetic field force can be adjusted, and the versatility of the magnetic bearing 30 can be further improved.

[0044] According to a specific embodiment of the present invention, Figure 3-Figure 5 As shown, the skeleton 41 includes: an inner ring 411 and an end plate 412. The inner circumference of the inner ring 411 is provided with a second through hole 43. The end plate 412 is respectively connected to the two ends of the inner ring 411. The end plate 412 and the inner ring 411 jointly form a winding groove 44. The electromagnetic coil 42 is wound in the winding groove 44.

[0045] The skeleton 41 is mainly composed of an inner ring 411 and an end plate 412. The inner circumference of the inner ring 411 is provided with a second through hole 43, which can facilitate the installation of the magnetic bearing 30. Two end plates 412 are provided, and the two end plates 412 are respectively connected to the two ends of the inner ring 411. Moreover, the end plates 412 are arranged in a circular shape, and the outer diameter of the end plates 412 is greater than the outer diameter of the inner ring 411. In this way, the end plates 412 and the inner ring 411 can jointly form a winding groove 44, and the cross-section of the winding groove 44 is U-shaped, which can provide installation space for the electromagnetic coil 42, and can also limit the electromagnetic coil 42, so as to ensure the stability of the position of the electromagnetic coil 42.

[0046] According to some embodiments of the present invention, Figure 7 As shown, the electromagnetic coil 42 includes a plurality of conductor coils, and the axial force lifting device 40 further includes: an insulating medium 50, which fills the winding groove 44, and the insulating medium 50 insulates and separates two adjacent conductor coils.

[0047] The multi-turn conductor coil can superimpose the magnetic fields generated by the current in each turn to form a stronger overall magnetic field. This superposition effect can enhance the magnetic field strength of the electromagnetic coil 42, so that it has better performance in the electromagnetic device. In addition, the multi-turn conductor coil can generate a more uniform magnetic field distribution.

[0048] Furthermore, the axial force lifting device 40 is also provided with an insulating medium 50, which insulates and isolates two adjacent conductor coils. In this way, a circuit short circuit can be prevented from occurring between the two adjacent conductor coils. In the electromagnetic coil 42, a relatively high current usually flows. If the two adjacent conductor coils are not insulated and isolated, a short circuit may occur, resulting in damage to the coil.

[0049] According to some embodiments of the present invention, Figure 7 As shown, the axial force enhancement device 40 further includes: an insulating sleeve 70 , which is sleeved on the outside of the electromagnetic coil 42 and the insulating medium 50 .

[0050] The insulating sleeve 70 can effectively protect the insulating medium 50 and the electromagnetic coil 42 from physical damage, such as mechanical shock, vibration, or corrosion by particles and chemicals in the external environment, which can improve the durability and long-term stability of the electromagnetic coil 42.

[0051] Moreover, the insulating sleeve 70 itself also has certain insulating properties, which can further enhance the overall insulation strength, thereby further improving the protection of the electromagnetic coil 42. Specifically, the insulating sleeve 70 can effectively prevent pollutants such as dust, grease or moisture from penetrating between the insulating medium and the electromagnetic coil. These pollutants may not only cause the conductivity to decrease, but also may cause arc discharge or insulation breakdown, thereby affecting safety and reliability.

[0052] According to some embodiments of the present invention, Figure 6 and Figure 7 As shown, the axial force lifting device 40 also includes: a first lead 60 and a second lead 61, the end plate 412 is formed with a third through hole 413, the first lead 60 and the second lead 61 pass through the third through hole 413, and the first lead 60 and the second lead 61 are respectively connected to the two ends of the electromagnetic coil 42, and the first lead 60 and the second lead 61 are used to connect to a power source.

[0053] The end plate 412 is provided with a third through hole 413, which can facilitate the insertion of the first lead 60 and the second lead 61. Furthermore, one end of the first lead 60 and the second lead 61 are respectively connected to the two ends of the electromagnetic coil 42, and the other ends of the first lead 60 and the second lead 61 are connected to the power supply, so that the power supply is electrically connected to the two ends of the electromagnetic coil 42 through the first lead 60 and the second lead 61, so that a current can be formed.

[0054] According to some embodiments of the present invention, Figure 6 As shown, the first lead 60 and the second lead 61 both include: a wire body and a sheath, the wire body is connected to the electromagnetic coil 42, and the sheath is sleeved on the wire body.

[0055] The first lead 60 and the second lead 61 are both composed of a wire body and a sheath. The wire body is located in the sheath, and the sheath can protect the wire body, thereby preventing the wire body from being damaged.

[0056] According to some embodiments of the present invention, Figure 2As shown, the inner ring 411 is interference fit with the magnetic bearing 30. In this way, the inner ring 411 and the magnetic bearing 30 can be integrated, and a gap can be avoided between the inner ring 411 and the magnetic bearing 30, and looseness and vibration between the inner ring 411 and the magnetic bearing 30 can be prevented, thereby ensuring the stability of the inner ring 411 and the magnetic bearing 30 during operation.

[0057] According to some embodiments of the present invention, the axial force enhancement device 40 further includes: a magnetic mounting plate, the magnetic mounting plate is connected to the skeleton 41 , the magnetic mounting plate is mounted on the shell 10 , and the skeleton 41 and the shell 10 are clearance-matched.

[0058] The magnetic mounting plate is connected to the frame 41 , which can further increase the magnetic force at the frame 41 . Since the frame 41 is provided with an electromagnetic coil 42 , the electromagnetic coil 42 interacts with the magnetic mounting plate, which can further increase the electromagnetic force at the frame 41 .

[0059] In addition, the frame 41 and the shell 10 are loosely matched, so that the frame 41 and the shell 10 can be easily installed and removed.

[0060] According to some embodiments of the present invention, Figure 2 As shown, the size of the magnetic bearing 30 in the axial direction of the rotor 20 is smaller than the size of the frame 41 in the axial direction of the rotor 20. In this way, the contact area between the magnetic bearing 30 and the frame 41 can be increased, and the magnetic bearing 30 can be prevented from coming off the frame 41 during high-speed operation.

[0061] According to some embodiments of the present invention, the frame 41 is an integrally formed insulating frame, so that the strength and rigidity of the frame 41 can be improved, and deformation of the frame 41 can be prevented, thereby further improving the stability of the flywheel energy storage device 100 during operation.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0064] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A flywheel energy storage device, characterized in that: include: case; a rotor, wherein the rotor is disposed in the housing; A magnetic bearing, wherein the magnetic bearing is installed in the housing, the magnetic bearing is provided with a first through-hole, and the rotor is passed through the first through-hole; An axial force lifting device, the axial force lifting device is installed in the housing, the axial force lifting device comprises: a frame and an electromagnetic coil, the electromagnetic coil is wound in the frame, the frame is provided with a second through hole, and the magnetic suspension bearing is installed in the second through hole; The skeleton comprises: an inner ring, wherein the inner circumference of the inner ring is provided with the second through-hole; End plates, the end plates are respectively connected to two ends of the inner ring, the end plates and the inner ring jointly form a winding groove, and the electromagnetic coil is wound in the winding groove; The dimension of the magnetic bearing in the axial direction of the rotor is smaller than the dimension of the skeleton in the axial direction of the rotor.

2. The flywheel energy storage device according to claim 1, characterized in that: The electromagnetic coil comprises a plurality of conductor coils; The axial force enhancement device further comprises: An insulating medium is filled in the winding groove and insulates and separates two adjacent turns of the conductor coil.

3. The flywheel energy storage device according to claim 2, characterized in that: The axial force enhancement device further comprises: An insulating sleeve is arranged on the outside of the electromagnetic coil and the insulating medium.

4. The flywheel energy storage device according to claim 1, characterized in that: The axial force enhancement device further comprises: A first lead and a second lead, the end plate is formed with a third through hole, the first lead and the second lead pass through the third through hole and are respectively connected to the two ends of the electromagnetic coil, and the first lead and the second lead are used to connect to a power source.

5. The flywheel energy storage device according to claim 4, characterized in that: The first lead and the second lead each include: A wire body, the wire body being connected to the electromagnetic coil; A sheath is sleeved on the wire body.

6. The flywheel energy storage device according to claim 1, characterized in that: The inner ring is interference fit with the magnetic bearing.

7. The flywheel energy storage device according to claim 1, characterized in that: The axial force enhancement device further comprises: A magnetically conductive mounting plate is connected to the frame, the magnetically conductive mounting plate is mounted on the shell, and the frame and the shell are clearance-matched.

8. The flywheel energy storage device according to claim 1, characterized in that: The frame is an integrally formed insulating frame.

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