CN212297270U - Flywheel device supported by repulsion type magnetic suspension bearing - Google Patents
Flywheel device supported by repulsion type magnetic suspension bearing Download PDFInfo
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- CN212297270U CN212297270U CN202020659506.4U CN202020659506U CN212297270U CN 212297270 U CN212297270 U CN 212297270U CN 202020659506 U CN202020659506 U CN 202020659506U CN 212297270 U CN212297270 U CN 212297270U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
A flywheel device supported by a repulsive force type magnetic suspension bearing is used for realizing self-stable operation without depending on a control system, and has small resistance and low energy consumption. The energy storage flywheel is fixedly arranged in the middle of the transmission shaft, the resetting device, the axial magnetic bearing and the radial magnetic bearing are symmetrically arranged outside the two axial sides, and the motor is arranged outside the radial side; the motor consists of a motor rotor fixed on the outer side of the energy storage flywheel and a motor stator winding fixed on the inner side of the shell; the axial magnetic suspension bearing consists of an upper Halbach array and a lower Halbach array which are axially fixed on the shell at intervals, and an axial coil group which is positioned between the upper Halbach array and the lower Halbach array and is fixed on the transmission shaft through a first support; the radial magnetic suspension bearing is composed of an inner ring Halbach permanent magnet array and an outer ring Halbach permanent magnet array which are fixed on the shell at intervals in the radial direction, and a radial coil group which is positioned between the inner ring Halbach permanent magnet array and the outer ring Halbach permanent magnet array and is fixed on the transmission shaft through a second support.
Description
Technical Field
The utility model relates to a flywheel energy storage technical field, concretely relates to provide flywheel device of support by repulsion type magnetic bearing.
Background
The flywheel energy storage is an electromechanical energy conversion device, when external electric energy is excessive, the electric energy is converted by a power electronic device and then is input into a motor to drive an energy storage flywheel to rotate, and the electric energy is converted into mechanical energy; when external electric energy is insufficient, the energy storage flywheel drags the motor to generate electricity, and the electricity is provided to the outside after being rotated by the power electronic device, so that mechanical energy is converted into electric energy.
The bearing is one of the core technologies of flywheel energy storage, and according to the difference of the bearing, the flywheel can be divided into two categories of transmission flywheel and magnetic suspension flywheel, and the traditional flywheel uses a mechanical bearing, and because the bearing has friction force, the rotating speed of the flywheel is greatly limited, and the energy storage capacity of the flywheel is very limited.
The magnetic suspension flywheel adopts a magnetic suspension bearing to provide supporting force, and can be divided into an electromagnetic attraction type flywheel and an electric repulsion type flywheel according to different electromagnetic force generation principles. The electromagnetic attraction type flywheel provides supporting force by utilizing the attraction between the electromagnet and the magnetic material, although the technology of the flywheel is relatively mature, the attraction is unstable, an active control system is required to be relied on, the cost is increased, the reliability is low, and more power electronic devices exist, so the service life of the flywheel is short. The electric repulsion type flywheel is supported by repulsion force between the moving conductor plate and the permanent magnet array, and because the flywheel has a high rotating speed under normal conditions, the skin effect of the conductor plate is very obvious, so that the equivalent resistance of the conductor plate is high, and the energy consumption and the heat dissipation of the flywheel energy storage device are high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a provide the flywheel device who supports by repulsion type magnetic bearing to realize the self-stabilizing operation under the condition that does not rely on control system, and the resistance is less, the energy consumption is low.
The utility model provides a technical scheme as follows that above-mentioned technical problem took:
the utility model discloses a provide flywheel gear who supports by repulsion type magnetic bearing, including energy storage flywheel, characterized by: the energy storage flywheel is fixedly arranged in the middle of the transmission shaft, two shaft ends of the transmission shaft are supported on the shell through auxiliary bearings, the two axial sides of the energy storage flywheel are externally and symmetrically provided with a reset device, an axial magnetic suspension bearing and a radial magnetic suspension bearing, and the radial sides are externally provided with a motor; the motor consists of a motor rotor fixed on the outer side of the energy storage flywheel and a motor stator winding fixed on the inner side of the shell; the reset device consists of an electromagnet fixed on the shell and an iron core fixed on the transmission shaft; the axial magnetic suspension bearing consists of an upper Halbach array and a lower Halbach array which are axially fixed on the shell at intervals, and an axial coil group which is positioned between the upper Halbach array and the lower Halbach array and is fixed on the transmission shaft through a first support; the radial magnetic suspension bearing consists of an inner ring Halbach permanent magnet array and an outer ring Halbach permanent magnet array which are fixed on the shell at intervals in the radial direction, and a radial coil group which is positioned between the inner ring Halbach permanent magnet array and the outer ring Halbach permanent magnet array and is fixed on the transmission shaft through a second bracket; the component arranged on the transmission shaft forms a device rotor, the component arranged on the shell forms a device stator, and the device rotor and the device stator are in no contact.
The beneficial effects of the utility model are that, the energy storage flywheel provides the holding power by passive magnetism suspension bearing, can realize the self-stabilizing operation under the condition that does not rely on control system, and the resistance is less, and the energy consumption is low, simple structure, and the good reliability can effectively solve current flywheel energy memory's not enough.
Drawings
The specification includes the following twelve figures:
fig. 1 is a schematic structural diagram of a flywheel device supported by a repulsive force type magnetic bearing according to the present invention;
fig. 2 is a schematic structural diagram of a stator in a flywheel apparatus supported by a repulsive force type magnetic bearing according to the present invention;
fig. 3 is a schematic structural diagram of a stator in a flywheel apparatus supported by a repulsive force type magnetic bearing according to the present invention;
fig. 4 is an initial state diagram of a flywheel device supported by a repulsive magnetic bearing according to the present invention;
fig. 5 is a schematic view of a resetting device in a flywheel device supported by a repulsive force type magnetic bearing according to the present invention;
FIG. 6 is a schematic view of the magnetizing direction of the permanent magnet of the axial magnetic bearing in the flywheel apparatus supported by the repulsive magnetic bearing of the present invention;
FIG. 7 is a schematic view of the magnetizing direction of the permanent magnet of the radial magnetic bearing in the flywheel apparatus supported by the repulsive magnetic bearing of the present invention;
fig. 8 is a schematic view and a current schematic view of an embodiment 1 of an axial coil and a radial coil in a flywheel apparatus supported by a repulsive force type magnetic bearing according to the present invention;
fig. 9 is a schematic view and a current schematic view of an embodiment 2 of an axial coil and a radial coil in a flywheel apparatus supported by a repulsive force type magnetic bearing according to the present invention;
fig. 10 is a schematic view and a current schematic view of an embodiment 3 of an axial coil in a flywheel apparatus supported by a repulsive force type magnetic bearing according to the present invention;
fig. 11 is a schematic view and a current schematic view of an embodiment 3 of a radial coil in a flywheel apparatus supported by a repulsive force type magnetic bearing according to the present invention;
fig. 12 is an electromagnetic force stiffness calculation curve.
The component names and corresponding labels are shown in the figure: the magnetic suspension bearing comprises an auxiliary bearing 1, a radial magnetic suspension bearing 2, an inner ring Halbach permanent magnet array 211, an outer ring Halbach permanent magnet array 212, a radial coil group 22, a radial coil 221, a second support 23, an axial magnetic suspension bearing 3, an upper Halbach array 311, a lower Halbach array 312, an axial coil group 32, an axial coil 321, a first support 33, an energy storage flywheel 4, a resetting device 5, an electromagnet 51, a resetting coil 511, an iron core 52, a motor 6, a motor stator winding 61, a motor rotor 62, a motor stator winding 61 and a shell 7.
Detailed Description
The structure of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the utility model discloses a provide flywheel device who supports by repulsion type magnetic bearing, including energy storage flywheel 4, 4 fixed mounting of this energy storage flywheel are at the middle part of transmission shaft 8, and two axle heads of transmission shaft 8 pass through auxiliary bearing 1 and support on shell 7. The energy storage flywheel 4 is provided with a reset device 5, an axial magnetic bearing 3 and a radial magnetic bearing 2 which are arranged outside the axial two sides symmetrically, and a motor 6 is arranged outside the radial side. The energy storage flywheel 4 is supported by the passive magnetic suspension bearing, and not only has simple structure and strong reliability, but also has lower energy consumption and can effectively solve the defects of the prior flywheel energy storage device.
Referring to fig. 1 and 3, the motor 6 is composed of a motor rotor 62 fixed on the outer side of the energy storage flywheel 4 and a motor stator winding 61 fixed on the inner side of the housing 7. The reset device 5 is composed of an electromagnet 51 fixed on the shell 7 and an iron core 52 fixed on the transmission shaft 8. The axial magnetic suspension bearing 3 is composed of an upper Halbach array 311 and a lower Halbach array 312 which are axially fixed on the shell 7 at intervals, and an axial coil group 32 which is positioned between the upper Halbach array and the lower Halbach array and is fixed on the transmission shaft 8 through a first bracket 33. The radial magnetic suspension bearing 2 is composed of an inner ring Halbach permanent magnet array 211 and an outer ring Halbach permanent magnet array 212 which are fixed on the shell 7 at radial intervals, and a radial coil group 22 which is positioned between the inner ring Halbach permanent magnet array and the outer ring Halbach permanent magnet array and is fixed on the transmission shaft 8 through a second support 23. With reference to fig. 3, the above-mentioned component mounted on the drive shaft 8 constitutes the device rotor. Referring to fig. 2, the components mounted on the housing 7 constitute a device stator, and there is no contact between the device rotor and the device stator.
Referring to fig. 7, the inner ring Halbach permanent magnet array 211 and the outer ring Halbach permanent magnet array 212 are magnetized in the radial direction and the arc direction in the same direction, so that the air gap magnetic field is strengthened, the radial coil assembly 22 is located in the air gap, and the second support 23 is made of a non-metallic material. The magnetizing direction of the radial permanent magnet array is shown in fig. 7, the radial magnetic fields are in the same direction, and arcs are in the direction of the magnetic fields, so repulsive forces generated by the upper current and the lower current are mutually superposed, resistance is mutually offset, and energy loss can be reduced to the maximum extent while the stability of the flywheel is ensured. Referring to fig. 6, the axial magnetic fields of the upper Halbach array 311 and the lower Halbach array 312 are reversely magnetized, and the arc magnetic fields are magnetized in the same direction, so that the air gap magnetic field is strengthened, the axial coil assembly 32 is located in the air gap, and the first support 33 is made of a non-metallic material.
Referring to embodiment 1 shown in fig. 8, the radial coil assembly 22 is composed of independent radial coils 221, the axial coil assembly 32 is composed of independent axial coils 321, the radial coils 221 and the axial coils 321 are closely arranged on the non-metal annular support, magnetic fluxes generated by the upper portion and the lower portion are mutually cancelled, and a resultant magnetic flux is zero. Referring to fig. 5, the electromagnets 51 are arranged annularly centering on the axis of the drive shaft 8. The zero-magnetic-flux coil assembly is filled with non-metallic materials and fixed on the annular support, so that the mechanical strength can be ensured, and the electromagnetic resistance and the energy consumption can be reduced.
Referring to embodiment 2 shown in fig. 9, the radial coil set 22 is composed of independent radial coils 221, the axial coil set 32 is composed of independent axial coils 321, the radial coils 221 and the axial coils 321 are rectangular coils, the rectangular coils are closely arranged on the non-metal ring-shaped support, and the current directions of the upper and lower sides of the coils are opposite. The rectangular coil assembly is filled with non-metal materials and fixed on the annular support, so that the mechanical strength can be ensured, and the electromagnetic resistance and the energy consumption can be reduced.
Referring to embodiment 3 shown in fig. 9 and 10, the radial coil assembly 22 employs a band coil winding, and the axial coil assembly 32 employs a disc coil winding. And by adopting the planar coil, the space can be saved, and the electromagnetic resistance and the energy consumption can be reduced.
At the beginning of the device, due to the action of gravity, the relative relationship between the stator and the rotor is shown in figure 4, at this time, the coil of the resetting device 5 is electrified, and under the action of the edge effect of the electromagnet 51, the rotor is lifted to the working position shown in figure 1.
When the device works in the energy storage state, external surplus electric energy is changed through power electronics and then is input to the motor stator winding 61 to drive the motor rotor 62 to rotate, so that the energy storage flywheel 4 and the transmission shaft 8 are driven to rotate, and the electric energy is converted into mechanical energy. At this time, since the radial coil assembly 22 is fixed on the transmission shaft 8, the coil rotates at the same angular speed, the coil cuts the air gap magnetic field between the inner Halbach permanent magnet array 211 and the outer Halbach permanent magnet array 212 to generate an induced current, and a magnetic field generated by the current interacts with the magnetic field of the Halbach array assembly to generate an electromagnetic force. According to lenz's law, the electromagnetic force of the inner Halbach permanent magnet array 211 to the radial coil set 22 is outward along the radial direction, the electromagnetic force of the outer Halbach permanent magnet array 212 to the coil set 22 is inward along the radial direction, and both forces are repulsive forces. Because the inner ring Halbach permanent magnet array 211 and the outer ring Halbach permanent magnet array 212 have the same structure and electromagnetic parameters, the radial coil assembly 22 can be stabilized at the center of the air gap between the inner ring Halbach permanent magnet array 211 and the outer ring Halbach permanent magnet array 212. When the device is disturbed, if the radial coil group 22 deviates to the inner ring Halbach permanent magnet array 211, the air gap between the radial coil group 22 and the inner ring Halbach permanent magnet array 211 is reduced, at the moment, the repulsive force of the inner ring Halbach permanent magnet array 211 to the radial coil group 22 is increased, the repulsive force of the outer ring Halbach permanent magnet array 212 to the coil group 22 is reduced, and the radial coil group 22 can be pushed back to the center of the air gap, so that the radial self-stable operation can be realized.
On the other hand, the radial coil group 22 is composed of independent zero-flux radial coils 221 which are closely arranged, the current directions in the coils are as shown in fig. 8, the current directions of the upper and lower edges of the coils are the same, the magnetizing direction of the radial permanent magnet array is as shown in fig. 7, the radial magnetic fields are opposite, the arc magnetic fields are the same, and the resistance force applied to the coils is equal to the product of the current of the upper and lower edges and the radial magnetic field, so that repulsive forces generated by the two currents are mutually superposed and mutually offset, and the energy loss can be reduced to the maximum extent while the stability of the flywheel is ensured.
Similarly, the axial magnetic suspension bearing composed of the upper Halbach array 311, the lower Halbach array 312 and the axial coil group 32 can ensure the axial self-stable operation of the device, similar to a radial bearing, the generated electromagnetic resistance can be mutually offset, and the energy loss is reduced.
When the device works in an energy release state, the energy storage flywheel 4 drives the motor 6 to work in a generator state, mechanical energy is converted into electric energy through power electronic change, the electric energy is output, the device can run in a self-stabilizing mode at the moment, and electromagnetic resistance is offset.
The device generates induced current through the coil and the permanent magnet, and when the flywheel runs at a high speed, the resistance generated by the upper current and the lower current of the coil can be mutually offset, so that the energy loss is greatly smaller than that of the existing device.
In conclusion, through reasonable parameter configuration, the flywheel energy storage device can realize self-stable operation without depending on a control system, and has small resistance and low energy consumption. Can solve various defects of the prior flywheel energy storage device.
The initial state of the device is schematically shown in fig. 4, and after the reset coil 511 of the reset device 5 is powered on, the rotor will be lifted to the starting state due to the edge effect, as shown in fig. 1. The variation of the axial stiffness of the device with air gap deflection was calculated as shown in fig. 9 when the design parameters are shown in table 1 below. It can be seen that the larger the air gap deflection, the greater the axial stiffness, and therefore the better the self-stability characteristics of the device, and obviously the radial stiffness has similar characteristics.
Table 1 permanent magnet and coil parameters in the calculation examples
| Parameter(s) | Value taking | Parameter(s) | Value taking |
| Remanence of permanent magnet | 1.277T | Pole pitch of permanent magnet array | 500mm |
| Number of modules under one pair of |
4 | Length of permanent magnet unit | 250mm |
| Thickness of coil | 5mm | Height of permanent magnet | 100mm |
| Width of coil | 100mm | Permanent magnet axial air gap | 80mm |
| Radius of energy-storing flywheel | 500mm | Height of energy storage flywheel | 300mm |
| Mass of energy storage flywheel | 100kg | Permanent magnet radial air gap | 20mm |
The above description is only used for illustrating some principles of the flywheel device supported by the repulsive force type magnetic bearing of the present invention, and it is not intended to limit the present invention to the specific structure and application range shown and described, so all the corresponding modifications and equivalents that may be utilized all belong to the patent scope applied by the present invention.
Claims (7)
1. The utility model provides a provide flywheel gear who supports by repulsion type magnetic bearing, includes energy storage flywheel (4), characterized by: the energy storage flywheel (4) is fixedly arranged in the middle of the transmission shaft (8), two shaft ends of the transmission shaft (8) are supported on the shell (7) through the auxiliary bearing (1), the two axial sides of the energy storage flywheel (4) are externally and symmetrically provided with the reset device (5), the axial magnetic suspension bearing (3) and the radial magnetic suspension bearing (2), and the radial sides are externally provided with the motor (6); the motor (6) consists of a motor rotor (62) fixed on the outer side of the energy storage flywheel (4) and a motor stator winding (61) fixed on the inner side of the shell (7); the reset device (5) consists of an electromagnet (51) fixed on the shell (7) and an iron core (52) fixed on the transmission shaft (8); the axial magnetic suspension bearing (3) consists of an upper Halbach array (311) and a lower Halbach array (312) which are axially fixed on the shell (7) at intervals, and an axial coil group (32) which is positioned between the upper Halbach array and the lower Halbach array and is fixed on the transmission shaft (8) through a first support (33); the radial magnetic suspension bearing (2) consists of an inner ring Halbach permanent magnet array (211) and an outer ring Halbach permanent magnet array (212) which are fixed on the shell (7) at intervals in the radial direction, and a radial coil group (22) which is positioned between the inner ring Halbach permanent magnet array and the outer ring Halbach permanent magnet array and is fixed on the transmission shaft (8) through a second support (23); the component arranged on the transmission shaft (8) forms a device rotor, the component arranged on the shell (7) forms a device stator, and the device rotor and the device stator are free from contact.
2. A flywheel apparatus supported by repulsive force type magnetic bearings as claimed in claim 1, wherein: the radial magnetic field of the inner ring Halbach permanent magnet array (211) and the radial magnetic field of the outer ring Halbach permanent magnet array (212) are reversely magnetized, the arc magnetic field is magnetized in the same direction, the radial coil group (22) is located in an air gap, and the second support (23) is made of non-metal materials.
3. A flywheel apparatus supported by repulsive force type magnetic bearings as claimed in claim 1, wherein: the axial magnetic fields of the upper Halbach array (311) and the lower Halbach array (312) are reversely magnetized, the arc magnetic fields are magnetized in the same direction, and the axial coil group (32) is positioned in an air gap; the first bracket (33) is made of a non-metallic material.
4. A flywheel apparatus supported by repulsive force type magnetic bearings as claimed in claim 1, wherein: the radial coil assembly (22) is composed of independent radial coils (221), and the axial coil assembly (32) is composed of independent axial coils (321).
5. A flywheel unit supported by repulsive force type magnetic levitation bearings as claimed in claim 4, wherein: the radial coils (221) and the axial coils (321) are rectangular coils, and the rectangular coils are closely arranged on the nonmetal annular support.
6. A flywheel unit supported by repulsive force type magnetic levitation bearings as claimed in claim 4, wherein: the radial coil group (22) adopts a band-shaped coil winding, and the axial coil group (32) adopts a disc-type coil winding.
7. A flywheel apparatus supported by repulsive force type magnetic bearings as claimed in claim 1, wherein: the electromagnets (51) are annularly arranged by taking the axis of the transmission shaft (8) as the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020659506.4U CN212297270U (en) | 2020-04-26 | 2020-04-26 | Flywheel device supported by repulsion type magnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020659506.4U CN212297270U (en) | 2020-04-26 | 2020-04-26 | Flywheel device supported by repulsion type magnetic suspension bearing |
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| CN212297270U true CN212297270U (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020659506.4U Active CN212297270U (en) | 2020-04-26 | 2020-04-26 | Flywheel device supported by repulsion type magnetic suspension bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199705A (en) * | 2022-05-31 | 2022-10-18 | 北京信息科技大学 | Multifunctional energy storage flywheel system with damping energy recovery and online modal monitoring functions |
| GB2610527A (en) * | 2022-01-04 | 2023-03-08 | Univ Jiangsu | Structure self-adjusting type vehicle-mounted flywheel battery coping with multiple operation modes and operating method thereof |
-
2020
- 2020-04-26 CN CN202020659506.4U patent/CN212297270U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2610527A (en) * | 2022-01-04 | 2023-03-08 | Univ Jiangsu | Structure self-adjusting type vehicle-mounted flywheel battery coping with multiple operation modes and operating method thereof |
| GB2610527B (en) * | 2022-01-04 | 2024-06-12 | Univ Jiangsu | Self-adjusting vehicle-mounted flywheel battery configured for multiple operation modes and operating method thereof |
| CN115199705A (en) * | 2022-05-31 | 2022-10-18 | 北京信息科技大学 | Multifunctional energy storage flywheel system with damping energy recovery and online modal monitoring functions |
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