CN116014964A - Mechanical support energy storage flywheel device unloaded by axial magnetic bearing - Google Patents

Mechanical support energy storage flywheel device unloaded by axial magnetic bearing Download PDF

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Publication number
CN116014964A
CN116014964A CN202211639447.4A CN202211639447A CN116014964A CN 116014964 A CN116014964 A CN 116014964A CN 202211639447 A CN202211639447 A CN 202211639447A CN 116014964 A CN116014964 A CN 116014964A
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CN
China
Prior art keywords
flywheel
bearing
assembly
rotor
supporting
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Pending
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CN202211639447.4A
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Chinese (zh)
Inventor
毕中炜
魏大忠
田希晖
郑领博
雷枝武
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Beijing Gaofu Power Technology Co ltd
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Beijing Gaofu Power Technology Co ltd
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Priority to CN202211639447.4A priority Critical patent/CN116014964A/en
Publication of CN116014964A publication Critical patent/CN116014964A/en
Pending legal-status Critical Current

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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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  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The application relates to the technical field of energy storage flywheel devices, in particular to a mechanically supported energy storage flywheel device unloaded by an axial magnetic bearing. The energy storage flywheel device comprises a flywheel supporting assembly and a flywheel rotor assembly positioned at the center; the flywheel supporting assembly comprises a bottom supporting assembly, a middle shell assembly and a top supporting assembly; the bottom supporting component is provided with a flywheel base, a bottom supporting seat, a flywheel rotor bottom supporting bearing component, an axial magnetic bearing stator coil inserting and suspension bearing component; the flywheel rotor bottom supporting bearing assembly is provided with an axial disc spring, a mechanical bearing seat and a bottom end cover; the suspension bearing assembly is provided with a protection bearing and a positioning end cover; the middle shell assembly is used for connecting the top supporting assembly and the bottom supporting assembly and is provided with a middle shell, an axial magnetic bearing stator rule and an axial displacement sensor; the top supporting component is provided with a top supporting seat, a motor shell component, a motor stator coil inserting and flywheel rotor top supporting bearing component; the motor shell assembly is provided with a motor shell and a cooling water jacket; the flywheel rotor top support bearing assembly is provided with an axial disc spring, a mechanical bearing seat, a top end cover and a rotary encoder; the flywheel rotor assembly comprises a flywheel and a motor rotor. The invention uses the axial magnetic bearing to suspend the flywheel rotor, so that the supporting bearing of the flywheel rotor does not bear the weight of the rotor, the power consumption of the mechanical bearing is reduced, the axial disc springs in the flywheel rotor supporting bearing assembly are used for providing axial suspension damping, the control difficulty of the magnetic bearing is reduced, the flywheel cost is reduced, and the reliability of the product is improved.

Description

Mechanical support energy storage flywheel device unloaded by axial magnetic bearing
Technical Field
The application relates to the field of energy storage flywheels, in particular to a mechanical support energy storage flywheel device unloaded by an axial magnetic bearing.
Background
The electric energy is the most demanding energy situation in the society today, and along with the dependence on the electric energy, the electric power system increasingly depends on the energy storage technology to adjust peaks and valleys, so that the energy consumption is reduced. The flywheel energy storage is to convert electric energy into kinetic energy for charging by utilizing inertia of a flywheel rotor and driving the flywheel rotor to rotate at a high speed through a motor, and convert the kinetic energy into electric energy for discharging when needed. Compared with chemical batteries, the energy storage density is high, the energy conversion rate is high, the charging and discharging time is short, the service life is long, and the cost is high.
The supporting technology of the flywheel rotor is a key technology of the energy storage flywheel and is also a key affecting the cost of the energy storage flywheel device. The supporting mode mainly comprises a mechanical bearing support and a magnetic bearing support, and the mechanical bearing support has the advantages of low cost, simple and reliable structure, and has the disadvantages of abrasion and lubrication; the magnetic bearing has the advantages of no contact, no need of lubrication, long service life, high cost, complex structure, high reliability requirement on a controller system, protection of the bearing from damage and the like.
Chinese patent application publication No. CN105811646B, publication No. 2019.03.01 discloses an energy storage flywheel device supported by a hybrid of magnetic and mechanical bearings, comprising a base, a flywheel rotor, a motor stator, an axial magnetic bearing, a radial magnetic bearing, and a mechanical bearing. According to the flywheel system, the flywheel rotor is attracted through the axial magnetic bearing, the upper end provides radial flexible support through the radial magnetic bearing, the rigid support of the flywheel is realized through the upper mechanical bearing and the lower mechanical bearing, the weight of the rotor is unloaded through the magnetic bearing, the service life of the mechanical bearing is prolonged, and the reliability of the flywheel system is improved.
The prior art has the following defects: the flywheel rotor is axially suspended without damping support, and the flywheel rotor is elastically supported by a magnetic bearing and rigidly supported by a mechanical bearing in the radial direction, so that the difficulty of a magnetic bearing control system is high, and the cost of the energy storage flywheel device is increased.
Disclosure of Invention
In view of this, the present application proposes a mechanically supported energy storage flywheel device that utilizes axial magnetic bearing unloading.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
a mechanically supported energy storage flywheel device offloaded with axial magnetic bearings, comprising a flywheel support assembly and a centrally located flywheel rotor assembly; the flywheel supporting assembly comprises a bottom supporting assembly, a middle shell assembly and a top supporting assembly; the bottom supporting component is provided with a flywheel base, a bottom supporting seat, a flywheel rotor bottom supporting bearing component, an axial magnetic bearing stator coil inserting and suspension bearing component; the flywheel rotor bottom supporting bearing assembly is provided with an axial disc spring, a mechanical bearing seat and a bottom end cover; the suspension bearing assembly is provided with a protection bearing and a positioning end cover; the middle shell assembly is used for connecting the top supporting assembly and the bottom supporting assembly and is provided with a middle shell, an axial magnetic bearing stator rule and an axial displacement sensor; the top supporting component is provided with a top supporting seat, a motor shell component, a motor stator coil inserting and flywheel rotor top supporting bearing component; the motor shell assembly is provided with a motor shell and a cooling water jacket; the flywheel rotor top support bearing assembly is provided with an axial disc spring, a mechanical bearing seat, a top end cover and a rotary encoder; the flywheel rotor assembly comprises a flywheel and a motor rotor.
The bottom and top support bearing assemblies are in rigid contact with the flywheel rotor assembly, the bottom and top support assemblies are provided with mechanical bearing seats and mechanical bearings, and the bottom support seats and the mechanical bearing seats in the bottom support assemblies are in clearance fit and can axially slide; the top support seat and the mechanical bearing seat in the top support assembly are in clearance fit and can axially slide.
The positioning end cover and the flywheel rotor are assembled in an interference mode, and the flywheel rotor is axially limited through a protection bearing of the suspension bearing assembly.
The axial disc springs at the two ends of the flywheel rotor are respectively arranged on the bottom supporting seat and the top supporting seat and respectively compress the bottom end cover and the top end cover.
The middle shell is provided with 4 axial displacement sensors, and signal transmission is realized through an aviation plug.
The flywheel rotor assembly is characterized in that a motor rotor in the flywheel rotor assembly is of a tile-shaped structure and is directly labeled on the outer edge surface of the main shaft, and carbon fiber prestress winding is adopted on the outer surface of the motor rotor.
The motor shell is provided with a water cooling channel, and the cooling water channel is spiral and is used for cooling the motor stator coil.
Compared with the prior art, the invention has the following advantages:
the invention uses the axial magnetic bearing to suspend the flywheel rotor, so that the supporting bearing of the flywheel rotor does not bear the weight of the rotor, the power consumption of the mechanical bearing is reduced, the axial disc springs in the flywheel rotor supporting bearing assembly are used for providing axial suspension damping, the control difficulty of the magnetic bearing is reduced, the flywheel cost is reduced, and the reliability of the product is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features and aspects of the present application and together with the description, serve to explain the principles of the present application.
FIG. 1 is a cross-sectional view of the structure of the present invention;
FIG. 2 is a cross-sectional view of the rigid contact and axial disc spring mounting of the flywheel rotor and back-up bearing assembly of the present invention;
FIG. 3 is a schematic view of a flywheel rotor assembly according to the present invention;
FIG. 4 is a schematic diagram of an axial displacement sensor according to the present invention;
FIG. 5 is a schematic diagram of a motor rotor according to the present invention;
FIG. 6 is a schematic view of a cooling water channel according to the present invention.
Description of the reference numerals
1-a bottom end cap; 2-mechanical bearings; 3-a mechanical bearing seat; 4-a bottom support base; 5-flywheel base; 6-inserting the stator coil of the axial magnetic bearing; 7-a flywheel rotor assembly; 71-a flywheel; 72-motor rotor; 8-a middle shell; 9-a motor housing; 10-a cooling water jacket; 11-motor stator coil insertion; 12-flywheel end caps; 13-a top support base; 14-a rotary encoder; 15-top end cap; 16-an axial displacement sensor; 17-protecting the bearing; 18-positioning an end cap; 19-axial disc springs; 20-rotating shaft; 21-permanent magnets; 22-carbon fibers; 23-magnetic isolation strips.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," etc. indicate or refer to an orientation or a positional relationship based on that shown in the drawings, merely for convenience of description or to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
In the description of the invention, it should be noted that the term "exemplary" means "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The term "coupled" is to be interpreted broadly, as being a fixed connection, as being a removable connection, or as being an integral connection. The specific meaning of the above terms in the creation of the present invention can be understood by those skilled in the art in a specific case.
The invention will be described in detail with reference to the examples.
A mechanically supported energy storage flywheel device unloaded with axial magnetic bearings, as shown in fig. 1-6, comprising a flywheel support assembly and a flywheel rotor assembly in the center; the flywheel supporting assembly comprises a bottom supporting assembly, a middle shell assembly and a top supporting assembly; the bottom supporting component is provided with a flywheel base 5, a bottom supporting seat 4, a flywheel rotor bottom supporting bearing component, an axial magnetic bearing stator rule 6 and a suspension bearing component; the flywheel rotor bottom support bearing assembly is provided with an axial disc spring 19, a mechanical bearing 2, a mechanical bearing seat 3 and a bottom end cover 1; the suspension bearing assembly is provided with a protection bearing 18 and a positioning end cover 17; the middle shell component is used for connecting the top supporting component and the bottom supporting component and is provided with a middle shell 8, an axial magnetic bearing stator coil inserting and an axial displacement sensor 16; the top supporting component is provided with a top supporting seat 13, a motor shell component, a motor stator rule 11 and a flywheel rotor top supporting bearing component; the motor shell assembly is provided with a motor shell 8 and a cooling water jacket 10; the flywheel rotor top support bearing assembly is provided with an axial disc spring, a mechanical bearing seat, a top end cover 15 and a rotary encoder 14; the flywheel rotor assembly includes a flywheel 71 and a motor rotor 72.
The bottom and top support bearing assemblies are in rigid contact with the flywheel rotor assembly 7, the bottom and top support assemblies are provided with mechanical bearing seats 3 and mechanical bearings 2, and the bottom support seat 4 and the mechanical bearing seats 3 in the bottom support assemblies are in clearance fit and can axially slide; the top support block 13 is axially slidably engaged with the mechanical bearing blocks in the top support assembly.
The positioning end cover 18 and the flywheel rotor assembly 7 are assembled in an interference mode, and the flywheel rotor assembly is axially limited through the protection bearing 17 of the suspension bearing assembly.
The axial disc springs 19 at the two ends of the flywheel rotor are respectively arranged on the bottom supporting seat 4 and the top supporting seat 13 and respectively press the bottom end cover 1 and the top end cover 15.
The middle shell is provided with 4 axial displacement sensors 16, and signal transmission is realized through aviation plugs.
The permanent magnet 21 of the motor rotor in the flywheel rotor assembly is of a tile-shaped structure, is directly labeled on the outer edge surface of the rotating shaft 20, adopts a magnetic isolation strip 23 between the permanent magnets, and adopts carbon fiber 22 for prestress winding on the outer surface of the motor rotor.
The motor shell 9 is provided with a cooling water channel which is spiral and is used for cooling the motor stator coil.
In an alternative embodiment, the motor housing may be implemented by a cast housing, which has the advantages of low cost and short machining cycle compared to a forged housing.
And the middle shell is provided with a lifting hole, so that the product is convenient to lift.
The invention uses the axial magnetic bearing to suspend the flywheel rotor, so that the supporting bearing of the flywheel rotor does not bear the weight of the rotor, the power consumption of the mechanical bearing is reduced, the axial disc springs in the flywheel rotor supporting bearing assembly are used for providing axial suspension damping, the control difficulty of the magnetic bearing is reduced, the flywheel cost is reduced, and the reliability of the product is improved.

Claims (6)

1. A mechanically supported energy storage flywheel device offloaded with axial magnetic bearings, comprising a flywheel support assembly and a centrally located flywheel rotor assembly; the flywheel supporting assembly comprises a bottom supporting assembly, a middle shell assembly and a top supporting assembly; the bottom supporting component is provided with a flywheel base, a bottom supporting seat, a flywheel rotor bottom supporting bearing component, an axial magnetic bearing stator coil inserting and suspension bearing component; the flywheel rotor bottom supporting bearing assembly is provided with an axial disc spring, a mechanical bearing seat and a bottom end cover; the suspension bearing assembly is provided with a protection bearing and a positioning end cover; the middle shell assembly is used for connecting the top supporting assembly and the bottom supporting assembly and is provided with a middle shell, an axial magnetic bearing stator rule and an axial displacement sensor; the top supporting component is provided with a top supporting seat, a motor shell component, a motor stator coil inserting and flywheel rotor top supporting bearing component; the motor shell assembly is provided with a motor shell and a cooling water jacket; the flywheel rotor top support bearing assembly is provided with an axial disc spring, a mechanical bearing seat, a top end cover and a rotary encoder; the flywheel rotor assembly comprises a flywheel and a motor rotor.
2. A mechanically supported energy storing flywheel device for unloading using an axial magnetic bearing as defined in claim 1 wherein: the flywheel rotor is supported by mechanical bearings to achieve high speed rotation.
3. A mechanically supported energy storing flywheel device for unloading using an axial magnetic bearing as defined in claim 1 wherein: the flywheel rotor realizes rotor suspension through the axial magnetic bearing, and the mechanical bearing only bears radial load when the flywheel rotor rotates at high speed.
4. A mechanically supported energy storing flywheel device for unloading using an axial magnetic bearing as defined in claim 1 wherein: the two ends of the flywheel rotor are provided with axial disc springs to provide elastic damping when the flywheel rotor is suspended by the axial magnetic bearings.
5. A mechanically supported energy storing flywheel device for unloading using an axial magnetic bearing as defined in claim 1 wherein: the motor rotor is of a tile-shaped structure and is directly labeled on the outer edge surface of the main shaft, and the outer surface of the motor rotor is wound by carbon fiber prestress.
6. A mechanically supported energy storing flywheel device for unloading using an axial magnetic bearing as defined in claim 1 wherein: the motor shell is provided with a spiral water cooling channel for cooling the motor stator coil.
CN202211639447.4A 2022-12-20 2022-12-20 Mechanical support energy storage flywheel device unloaded by axial magnetic bearing Pending CN116014964A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211639447.4A CN116014964A (en) 2022-12-20 2022-12-20 Mechanical support energy storage flywheel device unloaded by axial magnetic bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211639447.4A CN116014964A (en) 2022-12-20 2022-12-20 Mechanical support energy storage flywheel device unloaded by axial magnetic bearing

Publications (1)

Publication Number Publication Date
CN116014964A true CN116014964A (en) 2023-04-25

Family

ID=86020283

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211639447.4A Pending CN116014964A (en) 2022-12-20 2022-12-20 Mechanical support energy storage flywheel device unloaded by axial magnetic bearing

Country Status (1)

Country Link
CN (1) CN116014964A (en)

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