CN102684367B - High-capacity and high-efficiency magnetic suspension flywheel energy storage device - Google Patents
High-capacity and high-efficiency magnetic suspension flywheel energy storage device Download PDFInfo
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- CN102684367B CN102684367B CN201210154944.5A CN201210154944A CN102684367B CN 102684367 B CN102684367 B CN 102684367B CN 201210154944 A CN201210154944 A CN 201210154944A CN 102684367 B CN102684367 B CN 102684367B
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- flywheel
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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 relates to a high-capacity and high-efficiency magnetic suspension flywheel energy storage device. The high-capacity and high-efficiency magnetic suspension flywheel energy storage device comprises a flywheel component, a motor, heavy-load magnetic suspension bearings, a radial bearing, a vacuum sealing shell and a safety component, the flywheel component and the safety component are all arranged in the vacuum sealing shell, the motor, the heavy-load magnetic suspension bearings and the radial bearing are all arranged between the flywheel component and the vacuum sealing shell, the heavy-load magnetic suspension bearings are arranged above and below the motor, and the flywheel component, a rotor of the motor and the heavy-load magnetic suspension bearing form a whole rotor. Compared with the prior art, the high-capacity and high-efficiency magnetic suspension flywheel energy storage device has high energy storage capacity, low loss, high work efficiency and high safety, and is suitable for power energy storage (primary frequency control and peak load shaving), a batch-type new energy power generation system, and the recovery and releasing of the frequency brake starting energy of track traffic.
Description
Technical field
The present invention relates to a kind of energy accumulation device for fly wheel, especially relate to one and be applicable to the energy recovery of electric power energy storage (primary frequency modulation and peak load shifting), batch (-type) grid-connected power generation system, the frequent brake actuating of track traffic and the high capacity highly effective rate energy storage device of magnetic suspension flywheel discharging.
Background technology
Flywheel energy storage is a kind of physics energy storage, and compared with chemical energy storage, the born advantage that flywheel energy storage has at aspects such as environmental protection, high reliability, working life are very long, the speed of discharging and recharging can be fast or slow, is that chemical energy storage is incomparable.The moment of inertia J of the stored kinetic energy E of flywheel and flywheel and rotational speed omega square relevant, E=0.5J ω
2.Just at present technology, people mostly pay attention to the energy storage under fast state to flywheel and carry out correlation technique and investigation of materials, more concern be the energy density that how to improve energy accumulation device for fly wheel.But for large-capacity power energy storage, high speed flywheel does not have advantage.Under the certain prerequisite of the flywheel strength of materials, low speed, fly-wheel control during economic macro-energy energy storage reliably must rely on.Because fly-wheel control volume weight is large, how to reduce flywheel bearing loss, wind moussing loss and the no-load loss in when running, become the key issue that macro-energy flywheel high efficiency, long-time energy storage must solve.
Summary of the invention
Object of the present invention is exactly to provide the high capacity highly effective rate that a kind of loss is low, operating efficiency is high, safe energy storage device of magnetic suspension flywheel in order to overcome the defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of high capacity highly effective rate energy storage device of magnetic suspension flywheel, it is characterized in that, comprise flywheel assembly, motor, heavily loaded magnetic bearing, journal bearing, vacuum seal housing and security component, described flywheel assembly, security component are all located in vacuum seal housing, described motor, heavily loaded magnetic bearing, journal bearing are all located between flywheel assembly and vacuum seal housing, described heavily loaded magnetic bearing is located at motor upper and lower, described flywheel assembly, the rotor of motor and heavily loaded magnetic bearing composition integral rotor.
Described flywheel assembly comprises flywheel body, spoke supporting construction and rotating cylinder, and described flywheel body is connected with rotating cylinder by spoke supporting construction, and the described letter that turns is connected with the rotor of motor, heavily loaded magnetic bearing, journal bearing respectively.
Described motor is built-in asynchronous motor generator, comprises rotor and armature, and described rotor is arranged on rotating cylinder inner side, described armature is arranged on vacuum seal housing, and when outside input electric energy, machine operation is at motoring condition, convert electrical energy into the kinetic energy of flywheel body, i.e. charging; When needs are outwards powered, machine operation, at generating state, is converted to electric energy output, i.e. electric discharge by the kinetic energy of flywheel body.
Described heavily loaded magnetic bearing is the powerful permanent suspension bearing that multipair dynamic and static magnet ring is combined into, and conductive magnetic yoke is all equipped with in moving magnet ring outside and magnetostatic ring inner side.
Described vacuum seal housing comprises inner casing, shell, upper plate and lower plate, described inner casing, shell, upper plate and lower plate composition confined space, described inner casing, shell and upper plate, the junction of lower plate are equipped with static seal structure and vacuumize interface, described inner casing is connected with armature, heavily loaded magnetic bearing, journal bearing respectively, and described inner casing inner side is provided with cooling piece.
Described cooling piece is radiating fin or cooling jacket.
Described security component comprises and is located at the safe landing unit of rotating cylinder below and the safe revetment of the external side of flywheel.
Described safe landing unit comprises thrust bearing and is located at the buffer spring of thrust bearing below.
Described safe revetment is the protective layer that single or multiple lift consists of high-intensity fiber composite material.
Compared with prior art, the present invention has the following advantages:
1, adopt powerful permanent axial suspension bearing, substantially eliminate mechanical friction loss;
2, adopt built-in asynchronous motor generator, under the pure accumulation of energy of flywheel (not discharging and recharging) running status, by suitable excitation control, can eliminate the no-load loss of motor;
3, the rotor of heavily loaded magnetic bearing and motor and flywheel assembly are designed to integral rotor, make whole device can adopt static seal vacuum structure (having avoided complicated and insecure movable sealing structure), flywheel body rotates in a vacuum, has eliminated wind moussing loss;
4, improve operating efficiency, can reach 94%;
5, adopt rotor safe landing unit and buffer spring, while effectively preventing chance failure there is axial impact in flywheel rotor;
6, be provided with one or more layers radially protecting wall, just in case improper crackle appears in flywheel body, protecting wall can effectively protect the direct shock of the broken body of flywheel to shell, absorbs impact kinetic energy, ensures safety.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is sectional structure schematic diagram of the present invention.
Wherein: 1 is upper plate, 2 is static seal structure, and 3 is journal bearing, and 4 is heavily loaded magnetic bearing, and 5 is rotor, 6 is armature, and 7 is cooling piece, and 8 is thrust bearing, and 9 is inner casing, and 10 is rotating cylinder, 11 is buffer spring, and 12 is spoke supporting construction, and 13 is flywheel body, and 14 is safe revetment, and 15 is shell.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1 and Figure 2, a kind of high capacity highly effective rate energy storage device of magnetic suspension flywheel, comprise flywheel assembly, motor, heavily loaded magnetic bearing 4, journal bearing 3, vacuum seal housing and security component, described flywheel assembly, security component are all located in vacuum seal housing, described motor, heavily loaded magnetic bearing 4, journal bearing 3 is all located between flywheel assembly and vacuum seal housing, described heavily loaded magnetic bearing 4 is located at motor upper and lower, and described flywheel assembly, the rotor of motor and heavily loaded magnetic bearing 4 form integral rotor.
Described flywheel assembly comprises flywheel body 13, spoke supporting construction 12 and rotating cylinder 10, and described flywheel body 13 is connected with rotating cylinder 10 by spoke supporting construction 12, and described rotating cylinder 10 is connected with the rotor of motor, heavily loaded magnetic bearing 4, journal bearing 3 respectively.Flywheel body 13 is the large inertia hollow cylinder of major diameter of high-tensile structural steel making, and the stored energy capacitance of 2kWh～10MWh can be provided by electric power energy storage requirement.Spoke supporting construction 12 couples together flywheel body 13 and rotating cylinder 10, significantly alleviates the weight of rotary body.
Described motor is built-in asynchronous motor generator, comprise rotor 5 and armature 6, described rotor 5 is arranged on rotating cylinder 10 inner sides, described armature 6 is arranged on vacuum seal housing, armature 6 is connected with power supply by the Technics of Power Electronic Conversion device of electrical power two-way flow, and when outside input electric energy, machine operation is at motoring condition, convert electrical energy into the kinetic energy of flywheel body 13, i.e. charging; When needs are outwards powered, machine operation, at generating state, is converted to electric energy output, i.e. electric discharge by the kinetic energy of flywheel body 13.As required, can fast charging and discharging, can trickle charge put slowly, also can run on the long period and not fill the pure energy storage state of not putting, now, motor stops excitation, has eliminated open-circuit core loss.In addition rotor also can adopt permanent magnetism, salient pole core construction.
The powerful permanent suspension bearing that described heavily loaded magnetic bearing 4 is combined into for multipair dynamic and static magnet ring, all wt (weight of large-scale flywheel rotary body can reach tens of tons, tons even up to a hundred) that can rotating body for supporting, eliminates gravity frictional dissipation.The mode of magnetizing of magnet ring can be radial magnetizing, or axial charging, or magnetizes by Halbach row mode, and conductive magnetic yoke is all equipped with in moving magnet ring outside and magnetostatic ring inner side.
Journal bearing 3 can be mechanical bearing, can be also magnetic bearing, and its effect is the radial displacement of restriction rotating cylinder.Flywheel gear at right angle setting, during operation, in non-moving state, " journal bearing " do not need to bear radial load substantially, thereby frictional dissipation is very little.
Described vacuum seal housing comprises inner casing 9, shell 15, upper plate 1 and lower plate, described inner casing 9, shell 15, upper plate 1 and lower plate composition confined space, described inner casing 9, shell 15 are provided with static seal structure 2 and vacuumize interface with the junction of upper plate 1, lower plate, described inner casing 9 is connected with the stationary part of armature 6, heavily loaded magnetic bearing 4, journal bearing 3 respectively, and described inner casing 9 inner sides are provided with cooling piece 7.Static seal structure 2 makes housing inner chamber and extraneous airtight isolation, vacuumizes interface and is connected with outside vaccum-pumping equipment, keeps the high vacuum of inner chamber, thereby does not produce wind moussing loss during the rotation of flywheel body.Cooling piece 7 is radiating fin or cooling jacket, docks with external refrigeration device, and the heat producing when " motor " worked is taken away.
Described security component comprises and is located at the safe landing unit of rotating cylinder below and the safe revetment 14 of the external side of flywheel.Described safe landing unit comprises thrust bearing 8 and is located at the buffer spring 11 of thrust bearing below.Between rotating cylinder 10 and thrust bearing 8, there is safety clearance.
When the improper loss of excitation of heavily loaded magnetic bearing 4, when rotating cylinder 10 distance of glides meet or exceed safety clearance, thrust bearing 8 and buffer spring 11 will play safety supports effect to rotating cylinder 10.
The cylindrical shape protective layer that described safe revetment 14 consists of high-intensity fiber composite material for single or multiple lift.Its effect is that, when flywheel body occurs that crackle is broken under extreme failure condition, safe revetment can stop the broken body direct collision of flywheel shell, absorbs its impact kinetic energy, the safety of protection flywheel gear.The energy of the broken body of thickness, the number of plies, interfloor distance and absorption flywheel of " safe revetment " adapts.
Claims (8)
1. a high capacity highly effective rate energy storage device of magnetic suspension flywheel, it is characterized in that, comprise flywheel assembly, motor, heavily loaded magnetic bearing, journal bearing, vacuum seal housing and security component, described flywheel assembly, security component are all located in vacuum seal housing, described motor, heavily loaded magnetic bearing, journal bearing are all located between flywheel assembly and vacuum seal housing, described heavily loaded magnetic bearing is located at motor upper and lower, described flywheel assembly, the rotor of motor and heavily loaded magnetic bearing composition integral rotor; Described flywheel assembly comprises flywheel body, spoke supporting construction and rotating cylinder, and described flywheel body is connected with rotating cylinder by spoke supporting construction, and described rotating cylinder is connected with the rotor of motor, heavily loaded magnetic bearing, journal bearing respectively.
2. a kind of high capacity highly effective rate energy storage device of magnetic suspension flywheel according to claim 1, it is characterized in that, described motor is built-in asynchronous motor generator, comprise rotor and armature, described rotor is arranged on rotating cylinder inner side, and described armature is arranged on vacuum seal housing, when outside input electric energy, machine operation, at motoring condition, converts electrical energy into the kinetic energy of flywheel body, i.e. charging; When needs are outwards powered, machine operation, at generating state, is converted to electric energy output, i.e. electric discharge by the kinetic energy of flywheel body.
3. a kind of high capacity highly effective rate energy storage device of magnetic suspension flywheel according to claim 1, it is characterized in that, described heavily loaded magnetic bearing is the powerful permanent suspension bearing that multipair dynamic and static magnet ring is combined into, and conductive magnetic yoke is all equipped with in moving magnet ring outside and magnetostatic ring inner side.
4. a kind of high capacity highly effective rate energy storage device of magnetic suspension flywheel according to claim 1, it is characterized in that, described vacuum seal housing comprises inner casing, shell, upper plate and lower plate, described inner casing, shell, upper plate and lower plate composition confined space, described inner casing, shell and upper plate, the junction of lower plate are provided with static seal structure and vacuumize interface, described inner casing is connected with the stationary part of armature, heavily loaded magnetic bearing, journal bearing respectively, and described inner casing inner side is provided with cooling piece.
5. a kind of high capacity highly effective rate energy storage device of magnetic suspension flywheel according to claim 4, is characterized in that, described cooling piece is radiating fin or cooling jacket.
6. a kind of high capacity highly effective rate energy storage device of magnetic suspension flywheel according to claim 1, is characterized in that, described security component comprises and is located at the safe landing unit of rotating cylinder below and the safe revetment of the external side of flywheel.
7. a kind of high capacity highly effective rate energy storage device of magnetic suspension flywheel according to claim 6, is characterized in that, described safe landing unit comprises thrust bearing and is located at the buffer spring of thrust bearing below.
8. a kind of high capacity highly effective rate energy storage device of magnetic suspension flywheel according to claim 6, is characterized in that, described safe revetment is the protective layer that single or multiple lift consists of high-intensity fiber composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210154944.5A CN102684367B (en) | 2012-05-16 | 2012-05-16 | High-capacity and high-efficiency magnetic suspension flywheel energy storage device |
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| CN201210154944.5A CN102684367B (en) | 2012-05-16 | 2012-05-16 | High-capacity and high-efficiency magnetic suspension flywheel energy storage device |
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| CN102684367A CN102684367A (en) | 2012-09-19 |
| CN102684367B true CN102684367B (en) | 2014-04-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106253564B (en) * | 2016-08-12 | 2019-02-05 | 清华大学 | Packaged type flywheel energy storage unit safety protective device and its manufacturing process |
| CN106655611A (en) * | 2017-02-09 | 2017-05-10 | 桂林航天工业学院 | Electromagnetic suspension energy recovery type supporting braking system |
| CN108110942B (en) * | 2018-01-04 | 2023-10-27 | 中国科学院电工研究所 | Magnetic suspension mechanical energy storage system |
| CN115776193B (en) * | 2023-02-10 | 2023-04-07 | 山东天瑞重工有限公司 | Magnetic suspension flywheel battery |
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| CN101409478B (en) * | 2007-10-10 | 2012-05-23 | 沈阳中北昊通电子科技有限公司 | Permanent magnetism levitation energy-storing flywheel system |
| CN101964564B (en) * | 2010-10-15 | 2012-08-22 | 浙江工业大学 | Vertical type magnetic suspension flywheel battery adopting thin spoke flywheel |
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