CN114046337A - Vertical hybrid magnetic suspension flywheel energy storage device - Google Patents
Vertical hybrid magnetic suspension flywheel energy storage device Download PDFInfo
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- CN114046337A CN114046337A CN202111349705.0A CN202111349705A CN114046337A CN 114046337 A CN114046337 A CN 114046337A CN 202111349705 A CN202111349705 A CN 202111349705A CN 114046337 A CN114046337 A CN 114046337A
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- 239000000725 suspension Substances 0.000 title claims abstract description 49
- 238000004146 energy storage Methods 0.000 title claims abstract description 35
- 239000004020 conductor Substances 0.000 claims description 48
- 238000004804 winding Methods 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 2
- 230000033228 biological regulation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
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- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/30—Flywheels
- F16F15/315—Flywheels characterised by their supporting arrangement, e.g. mountings, cages, securing inertia member to shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
- F16C32/0451—Details of controllers, i.e. the units determining the power to be supplied, e.g. comparing elements, feedback arrangements with P.I.D. control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
- F16C32/0461—Details of the magnetic circuit of stationary parts of the magnetic circuit
- F16C32/0465—Details of the magnetic circuit of stationary parts of the magnetic circuit with permanent magnets provided in the magnetic circuit of the electromagnets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0485—Active magnetic bearings for rotary movement with active support of three degrees of freedom
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/30—Flywheels
- F16F15/315—Flywheels characterised by their supporting arrangement, e.g. mountings, cages, securing inertia member to shaft
- F16F15/3156—Arrangement of the bearings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
- H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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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
Abstract
The invention belongs to the technical field of flywheel energy storage, in particular to a vertical hybrid magnetic suspension flywheel energy storage device, which comprises a shell, a flywheel rotating shaft arranged in the shell, a flywheel arranged on the flywheel rotating shaft, axial support conical magnetic bearings arranged at two ends of the flywheel rotating shaft, a radial support magnetic bearing arranged at one side of the axial support conical magnetic bearing and positioned at the outer circle of one end of the flywheel rotating shaft, a kinetic reluctance motor arranged between the radial support magnetic bearing and the flywheel and arranged at the outer circle of the flywheel rotating shaft, and a hybrid magnetic bearing arranged at one side of the flywheel far away from the kinetic reluctance motor and positioned at the outer circle of one end of the flywheel rotating shaft, wherein the axial support conical magnetic bearing is matched with the radial support magnetic bearing to provide radial suspension force and axial suspension force, the whole device has a simple structure, particularly, a rotor without a permanent magnet is only a magnetic conduction iron core, the structure is simple and firm, high-speed operation is facilitated, and the energy conversion efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of flywheel energy storage, and particularly relates to a vertical hybrid magnetic suspension flywheel energy storage device.
Background
With the rapid development of new energy, smart grid, electric vehicles and other emerging industries, the energy storage technology becomes an important research topic in the world today. At present, the representative technologies of global energy storage include water pumping energy storage, compressed air energy storage, storage battery energy storage, superconducting energy storage, super capacitor energy storage, flywheel energy storage and the like, wherein the flywheel energy storage is a physical energy storage technology for converting electric energy into rotational kinetic energy of a flywheel for storage, and has the advantages of large energy storage density, high conversion efficiency, long service life, fast charging and discharging, cleanness, no pollution and the like. The magnetic suspension flywheel is particularly suitable for the fields of uninterrupted power supplies, rail transit, electric power engineering and the like, when the magnetic suspension flywheel stores energy, the motor is used as a motor, the motor drives the flywheel to rotate at a high speed, electric energy is converted into mechanical energy to be stored, when the magnetic suspension flywheel discharges, the motor is used as a generator, the flywheel drives the generator to generate electricity, the mechanical energy of the flywheel is converted into electric energy to be output to electric equipment, wherein the induction motor has large power consumption, a narrow speed regulation range and low energy conversion efficiency, the permanent magnet motor has large hysteresis loss during high-speed operation, the rotor of an embedded permanent magnet has poor mechanical strength, and the permanent magnet has serious demagnetization phenomenon at high temperature.
Therefore, the vertical hybrid magnetic suspension flywheel energy storage device is designed to solve the problems.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a vertical hybrid magnetic suspension flywheel energy storage device which has the advantages of simple and firm structure, high mechanical strength, wide speed regulation range, high operation efficiency, high critical rotating speed and almost no loss in no-load.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a vertical hybrid magnetic suspension flywheel energy memory, which comprises an outer shell, be located the flywheel pivot of shell and be located the epaxial flywheel of flywheel pivot, still including the axial that is located flywheel pivot both ends and support the toper magnetic bearing, be located axial support toper magnetic bearing one side and be located the radial support magnetic bearing that flywheel pivot one end excircle cover was established, be located between radial support magnetic bearing and the flywheel and set up the kinetic energy reluctance motor at flywheel pivot excircle, and be located the flywheel and keep away from kinetic energy reluctance motor one side and be located the hybrid magnetic bearing of flywheel pivot one end excircle.
Preferably, the axially supported conical magnetic bearing comprises an upper magnetic conductor I, a lower magnetic conductor I, an outer permanent magnet ring I, a middle permanent magnet ring I, an inner permanent magnet ring I and a safety gap I, wherein the top end of the upper magnetic conductor I is fixedly connected with the inner wall of the top end of the shell, the lower magnetic conductor I is fixedly connected with the excircle of the flywheel rotating shaft, the inner permanent magnet ring I is annularly arranged between the upper magnetic conductor I and the lower magnetic conductor I and positioned outside the flywheel rotating shaft, the middle permanent magnet ring I is annularly arranged on one side of the inner permanent magnet ring I, which is far away from the flywheel rotating shaft, the outer permanent magnet ring I is annularly arranged on one side of the middle permanent magnet ring I, which is far away from the inner permanent magnet ring I, and the safety gap I is reserved between the lower magnetic conductor I and the outer permanent magnet ring I, the middle permanent magnet ring I and the inner permanent magnet ring I.
Preferably, the radial support magnetic bearing comprises an upper magnetic conductor II, a lower magnetic conductor II, an outer permanent magnet ring II, a middle permanent magnet ring II, an inner permanent magnet ring II and a safety gap II, one side of the upper magnetic conductor II is fixedly connected with the inner wall of the shell, the lower magnetic conductor II is fixedly connected with the excircle of the flywheel rotating shaft, the inner permanent magnet ring II is annularly arranged between the upper magnetic conductor II and the lower magnetic conductor II and positioned on the outer side of the flywheel rotating shaft, the middle permanent magnet ring II is annularly arranged on one side of the inner permanent magnet ring II away from the flywheel rotating shaft, the outer permanent magnet ring II is annularly arranged on one side of the middle permanent magnet ring II away from the inner permanent magnet ring II, and the safety gap II is reserved between the lower magnetic conductor II and the outer permanent magnet ring II as well as between the middle permanent magnet ring II and the inner permanent magnet ring II.
The kinetic energy reluctance motor comprises a winding group, a suspension winding group, a motor stator, a motor rotor and a radial gap, wherein the motor rotor is fixedly connected with the outer side of a flywheel rotating shaft, the motor stator is fixedly connected with the inner wall of a shell, the radial gap is reserved between the motor stator and the motor rotor, and the winding group and the suspension winding group are mutually overlapped and surround on the motor stator.
Preferably, the hybrid magnetic bearing comprises an axial stator, a radial stator, a bearing rotor, radial coils, an axial coil, two radial permanent magnet rings and an axial air gap, wherein the axial stator is fixedly connected with the inner wall of the shell, the axial stator is fixedly connected with the two axial coils, the inner circumference of the axial stator is uniformly distributed with a plurality of radial stators, each radial stator is overlapped and surrounded with the radial coil, and the radial permanent magnet ring is embedded at the joint of the axial stator and the radial stator. An axial air gap is reserved between the bearing rotor and the radial stator, and an axial air gap is reserved between the bearing rotor and the axial stator.
Preferably, the outer permanent magnet ring I, the middle permanent magnet ring I and the inner permanent magnet ring I are arranged at intervals from inside to outside in the radial direction of the flywheel rotating shaft, have the same thickness and are fixedly connected with each other in parallel with the same axis.
Preferably, the inner permanent magnet ring I and the outer permanent magnet ring I are magnetized along the axial negative direction of the flywheel rotating shaft, the middle permanent magnet ring I is magnetized along the axial positive direction of the flywheel rotating shaft, and the axial magnetizing area of the middle permanent magnet ring I is equal to the sum of the axial magnetizing areas of the inner permanent magnet ring I and the outer permanent magnet ring I.
Preferably, the outer permanent magnet ring II, the middle permanent magnet ring II and the inner permanent magnet ring II are arranged at intervals from inside to outside in the radial direction of the flywheel rotating shaft, have the same thickness and are fixedly connected with each other in parallel with the same axis.
Preferably, the inner permanent magnet ring II and the outer permanent magnet ring II are magnetized along the axial negative direction of the flywheel rotating shaft, the middle permanent magnet ring II is magnetized along the axial positive direction of the flywheel rotating shaft, and the axial magnetizing area of the middle permanent magnet ring II is equal to the sum of the axial magnetizing areas of the inner permanent magnet ring II and the outer permanent magnet ring II.
Preferably, two axial coils are electrified with direct current, and the radial coils are electrified with three-phase alternating current.
Compared with the prior art, the invention has the beneficial effects that:
1. the vertical hybrid magnetic suspension flywheel energy storage device can provide radial suspension force and axial suspension force through the matching of the axial support conical magnetic bearing and the radial support magnetic bearing, so that the burden of bearing the gravity of a rotor system only by the axial bearing is reduced, the reliability of the axial bearing is improved, the service life of the axial bearing is prolonged, and the power consumption is also reduced;
2. the whole device is simple in structure, particularly, the rotor without a permanent magnet is only a magnetic conductive iron core, the structure is simple and firm, the high-speed and ultrahigh-speed operation is facilitated, the limit rotating speed of the flywheel is favorably improved, the energy storage capacity of the flywheel energy storage system is further improved, and meanwhile, the high-efficiency kinetic energy reluctance motor is adopted, so that the loss is reduced, and the energy conversion efficiency is improved;
3. the device has the advantages of large mechanical strength, wide speed regulation range, high operation efficiency, high critical rotating speed, no-load and almost no loss and the like which are incomparable with a series of other motors.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the housing according to the present invention;
FIG. 3 is a schematic cross-sectional view of the structure of the axial support magnetic bearing of the present invention;
FIG. 4 is a schematic cross-sectional view of the structure of a radial support magnetic bearing according to the present invention;
FIG. 5 is a schematic cross-sectional view of the kinetic reluctance motor of the present invention;
FIG. 6 is a schematic view of the interior of the housing of the present invention;
FIG. 7 is a schematic structural view of a hybrid magnetic bearing according to the present invention;
FIG. 8 is a schematic cross-sectional structural view of a hybrid magnetic bearing of the present invention;
in the figure:
1. a housing; 5. a flywheel shaft; 6. a flywheel;
2. axially supporting the conical magnetic bearing; 21. a first upper magnetic conductor; 22. a first lower magnetic conductor; 23. an outer permanent magnet ring I; 24. a first middle permanent magnet ring; 25. an inner permanent magnet ring I; 26. a first safety gap;
3. a radially supported magnetic bearing; 31. a second upper magnetic conductor; 32. a second lower magnetic conductor; 33. an outer permanent magnet ring II; 34. a middle permanent magnet ring II; 35. an inner permanent magnet ring II; 36. a second safety gap;
4. a kinetic reluctance motor; 41. winding; 42. a suspension winding group; 43. a motor stator; 44. a motor rotor; 45. a radial gap;
7. a hybrid magnetic bearing; 71. an axial stator; 72. a radial stator; 73. a bearing rotor; 74. a radial coil; 75. an axial coil; 76. a radial permanent magnet ring; 77. an axial air gap.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1;
a vertical hybrid magnetic suspension flywheel energy storage device comprises a shell 1, a flywheel rotating shaft 5 and a flywheel 6, wherein the flywheel rotating shaft 5 is located in the shell 1, and the flywheel 6 is located on the flywheel rotating shaft 5.
In this embodiment: in the conventional vertical hybrid magnetic suspension flywheel energy storage device, when the magnetic suspension flywheel 6 stores energy, a motor of the magnetic suspension flywheel 6 is used as a motor, the motor drives the flywheel 6 to rotate at a high speed, electric energy is converted into mechanical energy to be stored, when the magnetic suspension flywheel 6 discharges, the motor of the magnetic suspension flywheel is used as a generator, the flywheel 6 drives the generator to generate electricity, and the mechanical energy of the flywheel 6 is converted into electric energy to be output to electric equipment.
It should be noted that: the shell 1 plays a role in safety protection, dust prevention or internal vacuum maintenance, and simultaneously plays a role in reducing the resistance of the flywheel 6 during rotation, and the rotating speed is increased so as to improve the energy storage density of the flywheel 6.
As shown in fig. 1, 2, 3, 4, 5, 6, 7, and 8:
in combination with the above, the magnetic flywheel further comprises an axial supporting conical magnetic bearing 2 located at two ends of the flywheel rotating shaft 5, a radial supporting magnetic bearing 3 located on one side of the axial supporting conical magnetic bearing 2 and located at the outer circle of one end of the flywheel rotating shaft 5 in a sleeved mode, a kinetic energy reluctance motor 4 located between the radial supporting magnetic bearing 3 and the flywheel 6 and arranged at the outer circle of the flywheel rotating shaft 5, and a hybrid magnetic bearing 7 located on one side of the flywheel 6 far away from the kinetic energy reluctance motor 4 and located at the outer circle of one end of the flywheel rotating shaft 5.
In this embodiment: through the cooperation of the axial supporting conical magnetic bearing 2 and the radial supporting magnetic bearing 3, the stable suspension of the radial direction and the axial direction is ensured, the radial suspension force can be provided, and the axial suspension force can also be provided, thereby reducing the burden of bearing the gravity of a rotor system only by the axial bearing, improving the reliability of the axial bearing, prolonging the service life of the axial bearing, reducing the power consumption and simultaneously ensuring the stable work of the kinetic energy reluctance motor 4, when the flywheel 6 is interfered by the outside and the radial or axial gap of the flywheel 6 is changed, the current in the electromagnetic coils of the axial supporting conical magnetic bearing 2, the radial supporting magnetic bearing 3 and the hybrid magnetic bearing 7 is increased or reduced through the controller, and further the magnetic force of the axial supporting conical magnetic bearing 2, the radial supporting magnetic bearing 3 and the hybrid magnetic bearing 7 is increased or reduced, so as to keep the uniform and stable suspension of the gap of the rotating part and the static part of the flywheel 6 system, eliminate the external interference and achieve the self-stabilizing operation.
It should be understood that: the axial support conical magnetic bearing 2 comprises an upper magnetic conductor I21, a lower magnetic conductor I22, an outer permanent magnet ring I23, a middle permanent magnet ring I24, an inner permanent magnet ring I25 and a safety gap I26, wherein the top end of the upper magnetic conductor I21 is fixedly connected with the inner wall of the top end of the shell 1, the lower magnetic conductor I22 is fixedly connected with the excircle of the flywheel rotating shaft 5, the inner permanent magnet ring I25 is annularly arranged between the upper magnetic conductor I21 and the lower magnetic conductor I22 and positioned at the outer side of the flywheel rotating shaft 5, the middle permanent magnet ring I24 is annularly arranged at one side of the inner permanent magnet ring I25, the outer permanent magnet ring I23 is annularly arranged at one side of the middle permanent magnet ring I24 far away from the inner permanent magnet ring I25, the safety gap I26 is reserved between the lower magnetic conductor I22 and the outer permanent magnet ring I23, between the middle permanent magnet ring I24 and the inner permanent magnet ring I25, the safety gap I26 is 0.2-0.5 mm, and the wear between the two ends of the axial support conical magnetic bearing 2 when the flywheel 6 rotates can be reduced, the outer permanent magnet ring I23, the middle permanent magnet ring I24 and the inner permanent magnet ring I25 are arranged at intervals from inside to outside in the radial direction of the flywheel rotating shaft 5, are identical in thickness and are fixedly connected in parallel with the same axis, the inner permanent magnet ring I25 and the outer permanent magnet ring I23 are magnetized in the axial negative direction of the flywheel rotating shaft 5, the middle permanent magnet ring I24 is magnetized in the axial positive direction of the flywheel rotating shaft 5, the axial magnetizing area of the middle permanent magnet ring I24 is equal to the sum of the axial magnetizing areas of the inner permanent magnet ring I25 and the outer permanent magnet ring I23, and a bias magnetic field provided by the outer permanent magnet ring I23, the middle permanent magnet ring I24 and the inner permanent magnet ring I25 generates magnetic force in the axial direction of the flywheel rotating shaft 5 on the surface of the lower magnetic conductor I22.
It should be noted that: the radial support magnetic bearing 3 comprises an upper magnetic conductor II 31, a lower magnetic conductor II 32, an outer permanent magnet ring II 33, a middle permanent magnet ring II 34, an inner permanent magnet ring II 35 and a safety gap II 36, one side of the upper magnetic conductor II 31 is fixedly connected with the inner wall of the shell 1, the lower magnetic conductor II 32 is fixedly connected with the excircle of the flywheel rotating shaft 5, the inner permanent magnet ring II 35 is annularly arranged between the upper magnetic conductor II 31 and the lower magnetic conductor II 32 and positioned at the outer side of the flywheel rotating shaft 5, the middle permanent magnet ring II 34 is annularly arranged at one side of the inner permanent magnet ring II 35 far away from the flywheel rotating shaft 5, the outer permanent magnet ring II 33 is annularly arranged at one side of the middle permanent magnet ring II 34 far away from the inner permanent magnet ring II 35, the safety gap II 36 is reserved between the lower magnetic conductor II 32 and the outer permanent magnet ring II 33, and between the middle permanent magnet ring II 34 and the inner permanent magnet ring II 35, the safety gap II 36 is 0.2-0.5 mm, and the wear between the two ends of the flywheel rotating shaft 5 and the radial support magnetic bearing 3 during rotation of the flywheel 6 can be reduced, the outer permanent magnet ring II 33, the middle permanent magnet ring II 34 and the inner permanent magnet ring II 35 are arranged at intervals from inside to outside in the radial direction of the flywheel rotating shaft 5, are identical in thickness and are fixedly connected in parallel with the same axis, the inner permanent magnet ring II 35 and the outer permanent magnet ring II 33 are magnetized in the axial negative direction of the flywheel rotating shaft 5, the middle permanent magnet ring II 34 is magnetized in the axial positive direction of the flywheel rotating shaft 5, the axial magnetizing area of the middle permanent magnet ring II 34 is equal to the sum of the axial magnetizing areas of the inner permanent magnet ring II 35 and the outer permanent magnet ring II 33, and the bias magnetic field provided by the outer permanent magnet ring II 33, the middle permanent magnet ring II 34 and the inner permanent magnet ring II 35 generates magnetic force in the axial direction of the flywheel rotating shaft 5 on the surface of the lower magnetic conductor II 32.
In an alternative embodiment: the hybrid magnetic bearing 7 comprises an axial stator 71, radial stators 72, a bearing rotor 73, radial coils 74, axial coils 75, radial permanent magnet rings 76 and an axial air gap 77, wherein the axial stator 71 is fixedly connected with the inner wall of the housing 1, the axial stator 71 is fixedly connected with the two axial coils 75, the inner circumference of the axial stator 71 is uniformly distributed with a plurality of radial stators 72, the radial coils 74 are wound on the radial stators 72 in an overlapping manner, and the radial permanent magnet rings 76 are embedded at the joint of the axial stator 71 and the radial stators 72. An axial air gap 77 is reserved between the bearing rotor 73 and the radial stator 72, an axial air gap 77 is reserved between the bearing rotor 73 and the axial stator 71, two axial coils 75 are electrified with direct current, three-phase alternating current is electrified with the radial coils 74, the two axial coils 75 which are axial in the working process are electrified with direct current to control axial single degree of freedom, a plurality of radial coil 74 windings which are uniformly distributed along the circumference are electrified with three-phase alternating current to generate rotatable synthetic magnetic flux to control two radial degrees of freedom, the hybrid magnetic bearing 7 is matched with the radial support magnetic bearing 3 to complete controllable suspension of the axial degree of freedom, meanwhile, suspension force of two radial degrees of freedom is provided, and the hybrid magnetic bearing is matched with the kinetic reluctance motor 4 to complete the full suspension state of the energy storage device.
In an alternative embodiment: the kinetic reluctance motor 4 comprises a winding group 41, a suspension winding group 42, a motor stator 43, a motor rotor 44 and a radial gap 45, wherein the motor rotor 44 is fixedly connected with the outer side of the flywheel rotating shaft 5, the motor stator 43 is fixedly connected with the inner wall of the shell 1, the radial gap 45 is reserved between the motor stator 43 and the motor rotor 44 and ranges from 0.2 mm to 0.5mm, abrasion between two ends of the flywheel rotating shaft 5 and the kinetic reluctance motor 4 when the flywheel 6 rotates can be reduced, the suspension effect of the flywheel 6 is improved, the winding group 41 and the suspension winding group 42 are mutually overlapped and wound on the motor stator 43, and the suspension winding group 42 calculates current required by suspension force according to changes of radial load and torque winding current, so that stable suspension operation is realized.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a vertical hybrid magnetic suspension flywheel energy memory, includes shell (1), is located flywheel pivot (5) in shell (1) and is located flywheel (6) on flywheel pivot (5), its characterized in that: the magnetic bearing device is characterized by further comprising axial support conical magnetic bearings (2) arranged at two ends of the flywheel rotating shaft (5), radial support magnetic bearings (3) arranged on one side of the axial support conical magnetic bearings (2) and positioned at the outer circle of one end of the flywheel rotating shaft (5), a kinetic reluctance motor (4) arranged between the radial support magnetic bearings (3) and the flywheel (6) and arranged at the outer circle of the flywheel rotating shaft (5), and a hybrid magnetic bearing (7) arranged on one side of the flywheel (6) far away from the kinetic reluctance motor (4) and positioned at the outer circle of one end of the flywheel rotating shaft (5).
2. The vertical hybrid magnetic suspension flywheel energy storage device of claim 1, characterized in that: the axial support conical magnetic bearing (2) comprises an upper magnetic conductor I (21), a lower magnetic conductor I (22), an outer permanent magnetic ring I (23), a middle permanent magnetic ring I (24), an inner permanent magnetic ring I (25) and a safety gap I (26), wherein the top end of the upper magnetic conductor I (21) is fixedly connected with the top end inner wall of the shell (1), the lower magnetic conductor I (22) is fixedly connected with the outer circle of the flywheel rotating shaft (5), the inner permanent magnetic ring I (25) is annularly arranged between the upper magnetic conductor I (21) and the lower magnetic conductor I (22) and located on the outer side of the flywheel rotating shaft (5), the middle permanent magnetic ring I (24) is annularly arranged on one side, away from the flywheel rotating shaft (5), of the inner permanent magnetic ring I (25), the outer permanent magnetic ring I (23) is annularly arranged on one side, away from the inner permanent magnetic ring I (25), and the outer permanent magnetic ring I (23) are annularly arranged on the lower magnetic conductor I (22), And a first safety gap (26) is reserved between the first middle permanent magnet ring (24) and the first inner permanent magnet ring (25).
3. The vertical hybrid magnetic suspension flywheel energy storage device of claim 1, characterized in that: the radial support magnetic bearing (3) comprises a second upper magnetic conductor (31), a second lower magnetic conductor (32), a second outer permanent magnetic ring (33), a second middle permanent magnetic ring (34), a second inner permanent magnetic ring (35) and a second safety gap (36), one side of the second upper magnetic conductor (31) is fixedly connected with the inner wall of the shell (1), the second lower magnetic conductor (32) is fixedly connected with the outer circle of the flywheel rotating shaft (5), the second inner permanent magnetic ring (35) is annularly arranged between the second upper magnetic conductor (31) and the second lower magnetic conductor (32) and positioned on the outer side of the flywheel rotating shaft (5), the second middle permanent magnetic ring (34) is annularly arranged on one side of the second inner permanent magnetic ring (34) far away from the flywheel rotating shaft (5), the second lower magnetic conductor (32) and the second outer permanent magnetic ring (33), And a second safety gap (36) is reserved between the second middle permanent magnet ring (34) and the second inner permanent magnet ring (35).
4. The vertical hybrid magnetic suspension flywheel energy storage device of claim 1, characterized in that: kinetic energy reluctance motor (4), including winding group (41), suspension winding group (42), motor stator (43), motor rotor (44), radial gap (45), the outside of motor rotor (44) fixed connection flywheel pivot (5), the inner wall of motor stator (43) fixed connection shell (1), just leave radial gap (45) between motor stator (43) and motor rotor (44), just winding group (41) and suspension winding group (42) overlap each other and encircle on motor stator (43).
5. The vertical hybrid magnetic suspension flywheel energy storage device of claim 1, characterized in that: the hybrid magnetic bearing (7) comprises an axial stator (71), a radial stator (72), a bearing rotor (73), a radial coil (74), an axial coil (75), a radial permanent magnet ring (76) and an axial air gap (77), wherein the axial stator (71) is fixedly connected with the inner wall of the shell (1), two axial coils (75) are fixedly connected to the axial stator (71), a plurality of radial stators (72) are uniformly distributed on the inner circumference of the axial stator (71), and radial coils (74) are overlapped and wound on each radial stator (72), a radial permanent magnet ring (76) is embedded at the joint of the axial stator (71) and the radial stator (72), an axial air gap (77) is reserved between the bearing rotor (73) and the radial stator (72), an axial air gap (77) is reserved between the bearing rotor (73) and the axial stator (71).
6. The vertical hybrid magnetic suspension flywheel energy storage device of claim 2, wherein: the outer permanent magnet ring I (23), the middle permanent magnet ring I (24) and the inner permanent magnet ring I (25) are arranged at intervals from inside to outside in the radial direction of the flywheel rotating shaft (5), are identical in thickness and are fixedly connected with each other in parallel with the same axis.
7. The vertical hybrid magnetic suspension flywheel energy storage device of claim 2, wherein: the inner permanent magnet ring I (25) and the outer permanent magnet ring I (23) are magnetized along the axial negative direction of the flywheel rotating shaft (5), the middle permanent magnet ring I (24) is magnetized along the axial positive direction of the flywheel rotating shaft (5), and the axial magnetizing area of the middle permanent magnet ring I (24) is equal to the sum of the axial magnetizing areas of the inner permanent magnet ring I (25) and the outer permanent magnet ring I (23).
8. The vertical hybrid magnetic suspension flywheel energy storage device of claim 3, characterized in that: the outer permanent magnet ring II (33), the middle permanent magnet ring II (34) and the inner permanent magnet ring II (35) are arranged at intervals from inside to outside in the radial direction of the flywheel rotating shaft (5), are identical in thickness and are fixedly connected with each other in parallel with the same axis.
9. The vertical hybrid magnetic suspension flywheel energy storage device of claim 3, characterized in that: the inner permanent magnet ring II (35) and the outer permanent magnet ring II (33) are magnetized along the axial negative direction of the flywheel rotating shaft (5), the middle permanent magnet ring II (34) is magnetized along the axial positive direction of the flywheel rotating shaft (5), and the axial magnetizing area of the middle permanent magnet ring II (34) is equal to the sum of the axial magnetizing areas of the inner permanent magnet ring II (35) and the outer permanent magnet ring II (33).
10. The vertical hybrid magnetic suspension flywheel energy storage device of claim 5, characterized in that: two axial coils (75) are energized with direct current, and the radial coils (74) are energized with three-phase alternating current.
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| CN202111349705.0A CN114046337A (en) | 2021-11-15 | 2021-11-15 | Vertical hybrid magnetic suspension flywheel energy storage device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI807768B (en) * | 2022-04-08 | 2023-07-01 | 郭樹雄 | motor generator |
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| CN102437675A (en) * | 2011-10-13 | 2012-05-02 | 山东科技大学 | Energy storage device of magnetic suspension flywheel |
| CN102684365A (en) * | 2012-05-08 | 2012-09-19 | 江苏大学 | Flywheel energy storage device adopting bearingless switched reluctance motor |
| WO2012134367A1 (en) * | 2011-04-01 | 2012-10-04 | Electric Line Uppland Ab | A conical magnetic bearing |
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2021
- 2021-11-15 CN CN202111349705.0A patent/CN114046337A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012134367A1 (en) * | 2011-04-01 | 2012-10-04 | Electric Line Uppland Ab | A conical magnetic bearing |
| CN102437675A (en) * | 2011-10-13 | 2012-05-02 | 山东科技大学 | Energy storage device of magnetic suspension flywheel |
| CN102684365A (en) * | 2012-05-08 | 2012-09-19 | 江苏大学 | Flywheel energy storage device adopting bearingless switched reluctance motor |
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| TWI807768B (en) * | 2022-04-08 | 2023-07-01 | 郭樹雄 | motor generator |
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