CN109450158B - Cylindrical rotor flywheel energy storage system with permanent magnet bearing and electromagnetic bearing mixed support - Google Patents
Cylindrical rotor flywheel energy storage system with permanent magnet bearing and electromagnetic bearing mixed support Download PDFInfo
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- CN109450158B CN109450158B CN201811487119.0A CN201811487119A CN109450158B CN 109450158 B CN109450158 B CN 109450158B CN 201811487119 A CN201811487119 A CN 201811487119A CN 109450158 B CN109450158 B CN 109450158B
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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
- 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
- H02K7/08—Structural association with bearings
- H02K7/086—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
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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
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
A cylindrical rotor flywheel energy storage system with a permanent magnet bearing and an electromagnetic bearing in a mixed mode belongs to the technical field of flywheel energy storage. The invention solves the problems that the axial length of a flywheel rotor of the existing flywheel energy storage system influences the dynamic mechanical property of the rotor and causes poor structural compactness of the flywheel energy storage system, and the permanent magnet thrust bearing, the upper auxiliary bearing, the outer rotor permanent magnet synchronous motor and the lower auxiliary bearing are arranged on a mandrel from top to bottom, and the upper end and the lower end of a flywheel rotating body are in clearance fit with the upper auxiliary bearing and the lower auxiliary bearing; a gap is reserved between the permanent magnet thrust bearing and the upper end surface of the flywheel rotating body; the outer rotor permanent magnet synchronous motor is arranged in the flywheel rotating body and drives the flywheel rotating body to rotate; the upper radial electromagnetic bearing and the lower radial electromagnetic bearing are fixedly arranged on the shell, and the radial electromagnetic bearings and the outer wall of the flywheel rotating body are in a non-contact state. The rotor system has compact structure and improves the dynamic characteristics of the rotor.
Description
Technical Field
The invention relates to a flywheel energy storage system, in particular to a cylindrical rotor flywheel energy storage system supported by a permanent magnet bearing and an electromagnetic bearing in a mixed mode, and belongs to the technical field of flywheel energy storage.
Background
The flywheel energy storage system is used as an active source which can be flexibly regulated and controlled, actively participates in the dynamic behavior of the system, and can shorten the transient process after disturbance is eliminated, so that the system can quickly recover to a stable state. The flywheel energy storage system mainly comprises a flywheel rotor, a bearing, an integrated electric/power generation reciprocal bidirectional motor, an electronic power converter and the like. The integrated electric/power generation reciprocal bidirectional motor realizes the conversion of electric energy and mechanical energy of a high-speed flywheel. The electric energy drives a motor through a power converter, and the flywheel accelerates the energy storage; then, the motor runs constantly until receiving the energy release control signal; the high-speed flywheel drags the motor to generate electricity and release energy, and the current and the voltage suitable for the load are output through the converter.
To store more energy, reduce system losses, flywheel rotors are required to have a large moment of inertia and to operate at high rotational speeds in a vacuum environment. As an electromechanical integrated energy storage device integrating mechanical, control, electronic and other technologies, flywheel energy storage systems currently have a plurality of technical problems restricting engineering application of the flywheel energy storage system, and the flywheel energy storage system is mainly characterized in that a suspension support system is selected, and the performance and control of an integrated motor/generator are realized. If the flywheel energy storage system adopts an inner rotor motor and adopts a plurality of magnetic suspension bearings for supporting, the axial length of a flywheel rotor is generally increased, the dynamic mechanical property of the rotor is affected, and the flywheel energy storage system is poor in structural compactness.
Disclosure of Invention
The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention. Its purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.
In view of this, the invention is in order to solve the axial length of flywheel rotor that the existing flywheel energy storage system exists, influence the dynamic mechanical characteristic of the rotor and will lead to the flywheel energy storage system structure compactness poor problem, and then design a kind of permanent magnet bearing and electromagnetic bearing hybrid supported cylindrical rotor flywheel energy storage system, the system adopts outer rotor permanent magnet synchronous motor and permanent magnet bearing hybrid support.
The scheme adopted by the invention is as follows: the cylindrical rotor flywheel energy storage system with the permanent magnet bearing and the electromagnetic bearing in a mixed mode comprises an energy storage conversion part, a rotor supporting part and an auxiliary part;
the energy storage conversion part comprises a flywheel rotator and an outer rotor permanent magnet synchronous motor 6; the rotor supporting part comprises an upper radial electromagnetic bearing, a lower radial electromagnetic bearing, an upper auxiliary bearing, a lower auxiliary bearing and a permanent magnetic thrust bearing; the auxiliary part comprises a shell and a mandrel;
wherein the mandrel and the flywheel rotating body are arranged in the shell, and the inside of the shell is kept in a vacuum state; the permanent magnet thrust bearing, the upper auxiliary bearing, the outer rotor permanent magnet synchronous motor and the lower auxiliary bearing are all arranged on the mandrel and are sequentially distributed from top to bottom along the axial direction; the upper auxiliary bearing, the lower auxiliary bearing and the inner stator of the outer rotor permanent magnet synchronous motor are fixedly arranged on the mandrel; the upper end and the lower end of the flywheel rotating body are connected with the mandrel through an upper auxiliary bearing and a lower auxiliary bearing, and are in a clearance fit state with the upper auxiliary bearing and the lower auxiliary bearing; the permanent magnet thrust bearing is arranged above the flywheel rotating body, and a gap is reserved between the permanent magnet thrust bearing and the upper end surface of the flywheel rotating body; the outer rotor permanent magnet synchronous motor is arranged in the flywheel rotating body and drives the flywheel rotating body to rotate; the upper radial electromagnetic bearing and the lower radial electromagnetic bearing are fixedly arranged on the shell, and are in a non-contact state with the outer wall of the flywheel rotating body.
Further: the flywheel rotator comprises a flywheel, a flywheel upper end cover and a flywheel lower end cover, wherein the flywheel upper end cover and the flywheel lower end cover are arranged at the upper end and the lower end of the flywheel, the flywheel upper end cover is in clearance fit with an upper auxiliary bearing, and the flywheel lower end cover is in clearance fit with a lower auxiliary bearing.
Further: the flywheel rotating body is an alloy steel flywheel rotating body.
Further: the gaps among the upper radial electromagnetic bearing, the lower radial electromagnetic bearing and the outer wall of the flywheel rotating body are 0.5-1 mm. The flywheel rotating body is controlled by electromagnetic force, and is not in radial contact with the bearing, so that mechanical friction and abrasion are greatly reduced, the flywheel rotating body is radially supported and actively controlled, and the bearing support stability can be well ensured.
Further: gaps between the upper end and the lower end of the flywheel rotating body and the upper auxiliary bearing and the lower auxiliary bearing are 0.1-0.5 mm. The flywheel rotating body is controlled by electromagnetic force, and is not in axial contact with the bearing, and is in a suspension state, so that mechanical friction and abrasion are greatly reduced.
Further: and a permanent magnet is embedded in the permanent magnet thrust bearing. By the arrangement, the flywheel rotating body can be axially unloaded.
Further: the gap between the permanent magnet thrust bearing and the upper end face of the flywheel rotating body is 0.5-1 mm. The flywheel rotating body is controlled by magnetic force, and is not in axial contact with the permanent magnetic thrust bearing, so that mechanical friction and abrasion are greatly reduced, the permanent magnetic thrust bearing axially unloads the flywheel rotor, and the axial load of the electromagnetic bearing can be greatly reduced.
Further: the motor inner stator of the outer rotor permanent magnet synchronous motor is a winding coil, and the motor outer rotor of the outer rotor permanent magnet synchronous motor is a SmCo permanent magnet.
Further: the upper auxiliary bearing is axially positioned on the mandrel through an upper fixed shaft sleeve, and the lower auxiliary bearing is axially positioned on the mandrel through a lower positioning sleeve; the upper radial electromagnetic bearing is arranged on the shell through an upper electromagnetic bearing outer stator support, and the lower radial electromagnetic bearing is arranged on the shell through a lower electromagnetic bearing outer stator support. The upper end face and the lower end face of the magnet are restrained and fastened by the fixed shaft sleeve, and the outer surface of the permanent magnet is protected by the inner surface of the flywheel rotating body.
Further: the upper radial electromagnetic bearing and the lower radial electromagnetic bearing have the same structure and comprise a stator coil and a silicon steel sheet rotor arranged in the stator coil, wherein the stator coil is an outer stator of the electromagnetic bearing, the silicon steel sheet rotor is an inner rotor of the electromagnetic bearing, and a gap is reserved between the stator coil and the silicon steel sheet rotor. So designed, the active electromagnetic bearing contributes to a compact design.
Further: the upper auxiliary bearing and the lower auxiliary bearing adopt rolling bearings. The axial surface and the outer radial surface of the outer ring of the rolling bearing are respectively provided with a gap between the upper end cover of the flywheel and the lower end cover of the flywheel, and the gap is smaller than the gap between the stator coil and the silicon steel sheet rotor. The upper auxiliary bearing and the lower auxiliary bearing are fixed on the inner ring, and when the rotor falls or needs to be maintained, the outer ring of the auxiliary bearing bears the impact of the rotor, so that the rotor is prevented from contacting with the electromagnetic bearing.
Further: the shell comprises an upper shell and a lower shell which are connected through bolts, the inside of the shell is kept in a vacuum state, and the vacuum degree is at least 0.1Pa. The vacuum environment can effectively reduce wind resistance when the high-speed rotor rotates, reduce friction when the rotor rotates, effectively reduce mechanical loss and improve energy storage efficiency.
The invention achieves the following effects:
the invention selects the outer rotor permanent magnet synchronous motor as the integrated electric/power generation reciprocal bidirectional motor, which can make the rotor system compact in structure and promote the rotor dynamics. Meanwhile, the flywheel also plays a certain role in protecting the permanent magnet tiles. The heat dissipation mode of the motor inner stator can be a forced water cooling mode. The novel outer rotor active electromagnetic bearing is adopted to radially support and actively control the flywheel rotor, the permanent magnet bearing axially unloads the flywheel rotor, the stability of bearing support can be ensured, friction is reduced, vibration is reduced, the space structure size of the system is further compact, and the system miniaturization design is facilitated.
Specifically: the flywheel energy storage system utilizes an upper radial electromagnetic bearing, a lower radial electromagnetic bearing, an upper auxiliary bearing, a lower auxiliary bearing and a permanent magnetic thrust bearing to suspend the flywheel rotating body in a non-contact manner, the axial displacement, the radial displacement and the rotation around the horizontal plane x axis and the y axis of the flywheel rotating body are controlled by the upper radial electromagnetic bearing and the lower radial electromagnetic bearing, and the axial rotation of the flywheel rotating body is controlled by an outer rotor permanent magnetic synchronous motor. By the design, the flywheel rotating body can rotate at a high speed in a non-contact state in space and is in a friction-free full-suspension state, so that friction loss of a high-speed rotor can be well avoided, and wind loss can be effectively reduced in a vacuum environment. The outer rotor permanent magnet synchronous motor is arranged in the flywheel rotating body, and compared with a series structure of the motor and the flywheel in the inner rotor motor system, the axial size of a shafting is greatly reduced, the structure is compact, and the vibration of a rotor is reduced. The upper auxiliary bearing and the lower auxiliary bearing provide temporary auxiliary support for the rotor, prevent the system from failure, prevent the rotor from falling down to collide with the electromagnetic bearing, and play a role in limiting and protecting the rotor.
Drawings
FIG. 1 is a block diagram of a cylindrical rotor flywheel energy storage system with a permanent magnet bearing and an electromagnetic bearing in a hybrid support;
FIG. 2 is a block diagram of a flywheel;
fig. 3 is a structural diagram of an outer rotor permanent magnet synchronous motor;
FIG. 4 is a schematic view of a radial electromagnetic bearing;
fig. 5 is a schematic view of an auxiliary bearing structure.
In the figure:
1-a flywheel; 2-flywheel upper end cover; 3-flywheel lower end cover; 4-upper radial electromagnetic bearings; 5-lower radial electromagnetic bearings; 6-an outer rotor permanent magnet synchronous motor; 7-upper auxiliary bearings; 8-lower auxiliary bearings; 9-permanent magnet thrust bearings; 10-upper fixed shaft sleeve; 11-an upper housing; 12-a lower housing; 13-upper electromagnetic bearing outer stator support; 14-supporting an outer stator of the lower electromagnetic bearing; 15-a bolt and 16-a mandrel; 17-lower fixed shaft sleeve; 18-permanent magnets; 19-an outer rotor of the motor; 20-an inner stator of the motor; 21-stator coils; 22-silicon steel sheet rotor.
Detailed Description
In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made in order to achieve the developer's specific goals, such as compliance with system-and business-related constraints, and that these constraints will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.
It should be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only the device structures and/or processing steps closely related to the solution according to the present invention are shown in the application document, while other details not greatly related to the present invention are omitted.
Examples: referring to fig. 1 to 5, the cylindrical rotor flywheel energy storage system with the permanent magnet bearing and the electromagnetic bearing in the present embodiment includes an energy storage conversion portion, a rotor supporting portion and an auxiliary portion; wherein the energy storage conversion section includes: flywheel rotating body, integrated electric/power generation reciprocal bidirectional motor; the rotor supporting portion includes: an upper radial electromagnetic bearing 4, a lower radial electromagnetic bearing 5, a permanent magnetic thrust bearing 9, an upper auxiliary bearing 7 and a lower auxiliary bearing 8; the auxiliary portion includes: a housing and a spindle 16.
Wherein, the integrated electric/power generation reciprocal bidirectional motor selects an outer rotor permanent magnet synchronous motor 6, a permanent magnet thrust bearing 9, an upper auxiliary bearing 7, the outer rotor permanent magnet synchronous motor 6 and a lower auxiliary bearing 8 are arranged on a mandrel 16 in sequence from top to bottom in the axial direction.
The upper auxiliary bearing 7, the lower auxiliary bearing 8 and the inner stator of the outer rotor permanent magnet synchronous motor 6 are fixedly arranged on the mandrel 16. The upper radial electromagnetic bearing and the lower radial electromagnetic bearing are fixedly arranged on the shell, and are in a non-contact state with the outer wall of the flywheel rotating body. The inside of the housing is kept in a vacuum state.
The flywheel energy storage system utilizes the radial electromagnetic bearing and the permanent magnetic thrust bearing to suspend the flywheel rotating body in a contactless manner, so that the friction loss of the high-speed rotor can be well avoided, and the wind loss can be effectively reduced in a vacuum environment.
The flywheel rotating body is made of alloy steel, the flywheel 1 is connected with the flywheel upper end cover 2 and the flywheel lower end cover 3 through bolts, the axial displacement, the radial displacement and the rotation around the horizontal plane x axis and the y axis of the flywheel rotating body are controlled by an upper radial electromagnetic bearing 4 and a lower radial electromagnetic bearing 5, and the axial rotation of the flywheel rotating body is controlled by an outer rotor permanent magnet synchronous motor 6.
Permanent magnets 18 are embedded in the permanent magnet thrust bearing 9, so that the flywheel rotating body can be axially unloaded. A tiny gap exists between the permanent magnet thrust bearing 9 and the flywheel rotating body, and the permanent magnet thrust bearing and the flywheel rotating body are not contacted with each other. Meanwhile, the upper radial electromagnetic bearing 4 and the lower radial electromagnetic bearing 5 carry out radial supporting and active control on the flywheel 1, and the bearing supporting stability can be well ensured. The flywheel rotating body can rotate at high speed in a non-contact state in space and is in a friction-free full-suspension state through the support of the permanent magnetic thrust bearing, the upper radial electromagnetic bearing 4 and the lower radial electromagnetic bearing 5.
The integrated electric/power generation reciprocal bidirectional motor selects the outer rotor permanent magnet synchronous motor 6. The outer rotor permanent magnet synchronous motor 6 is a core component for electric energy conversion. When the energy is stored, the electric energy drives the motor through the electric power converter, the motor drives the flywheel to accelerate to rotate, and the electric energy is converted into mechanical energy of the flywheel to store the energy; then the motor runs constantly until receiving the energy release control signal; when releasing energy, the high-speed flywheel drags the motor to generate electricity, and the current and the voltage suitable for the load are output through the power converter.
The upper auxiliary bearing 7 is axially positioned on the mandrel 16 through the upper fixed shaft sleeve 10; the lower auxiliary bearing 8 is axially positioned on the mandrel 16 through a lower positioning sleeve 17; the upper radial electromagnetic bearing 4 is mounted on the housing by an upper electromagnetic bearing outer stator support 13 and the lower radial electromagnetic bearing 5 is mounted on the housing by a lower electromagnetic bearing outer stator support 14.
The flywheel 1 is cylindrical in overall shape, and the flywheel rotating body is made of alloy steel materials.
The outer rotor permanent magnet synchronous motor 6 adopts an outer rotor structure (figure 3), and can be arranged in a flywheel rotating body, so that the axial size of a shafting is greatly reduced, the structure is compact, the rotor dynamics characteristic is improved, and the rotor vibration is reduced. Wherein 20 is an inner stator of the motor, which is a winding coil; 19 is the motor outer rotor, which is the permanent magnet SmCo.
The structures of the upper radial electromagnetic bearing 4 and the lower radial electromagnetic bearing 5 are shown in fig. 4, the upper radial electromagnetic bearing 4 and the lower radial electromagnetic bearing 5 have the same structure, and the structure comprises a stator coil 21 and a silicon steel sheet rotor 22 arranged in the stator coil 21, wherein the stator coil 21 is an outer stator of the electromagnetic bearing, the silicon steel sheet rotor 22 is an inner rotor of the electromagnetic bearing, and a gap is reserved between the stator coil 21 and the silicon steel sheet rotor 22. The outer rotor radial electromagnetic bearing contributes to compact design.
Meanwhile, an upper auxiliary bearing 7 and a lower auxiliary bearing 8 are respectively arranged at the upper end and the lower end of the flywheel rotating body, so that temporary auxiliary support is provided for the rotor, the system failure rotor is prevented from falling down to collide with the electromagnetic bearing, and the limiting and protecting effects are achieved for the rotor.
The upper auxiliary bearing 7 and the lower auxiliary bearing 8 are shown in fig. 5, respectively. The upper auxiliary bearing 7 and the lower auxiliary bearing 8 select rolling bearings. The axial surface and the outer radial surface of the outer ring of the rolling bearing respectively have a tiny gap with the upper end cover 2 of the flywheel and the lower end cover 3 of the flywheel, and the gap is smaller than the gap between the stator coil 21 and the silicon steel sheet rotor 22. The auxiliary bearing inner ring is fixed, and when the rotor falls or needs to be maintained, the auxiliary bearing outer ring bears the rotor impact, so that the rotor is prevented from being contacted with the electromagnetic bearing.
In order to reduce wind resistance friction when the flywheel rotor rotates at a high speed, the energy conversion efficiency of the system is effectively ensured, and the vacuum state is required to be maintained in the system shell. The housing comprises an upper housing 11 and a lower housing 12, which are connected by means of bolts 15.
Although the embodiments of the present invention are described above, the present invention is not limited to the embodiments adopted for the purpose of facilitating understanding of the technical aspects of the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the core technical solution disclosed in the present invention, but the scope of protection defined by the present invention is still subject to the scope defined by the appended claims.
Claims (7)
1. The cylindrical rotor flywheel energy storage system with the permanent magnet bearing and the electromagnetic bearing in a mixed mode comprises an energy storage conversion part, a rotor supporting part and an auxiliary part;
the method is characterized in that: the energy storage conversion part comprises a flywheel rotating body and an outer rotor permanent magnet synchronous motor (6); the rotor supporting part comprises an upper radial electromagnetic bearing (4), a lower radial electromagnetic bearing (5), an upper auxiliary bearing (7), a lower auxiliary bearing (8) and a permanent magnetic thrust bearing (9); the auxiliary part comprises a housing and a spindle (16);
wherein the mandrel (16) and the flywheel rotating body are arranged in a shell, and the inside of the shell is kept in a vacuum state; the permanent magnet thrust bearing (9), the upper auxiliary bearing (7), the outer rotor permanent magnet synchronous motor (6) and the lower auxiliary bearing (8) are all arranged on the mandrel (16) and are sequentially distributed from top to bottom along the axial direction; the upper auxiliary bearing (7), the lower auxiliary bearing (8) and the inner stator of the outer rotor permanent magnet synchronous motor (6) are fixedly arranged on the mandrel (16); the upper end and the lower end of the flywheel rotating body are connected with the mandrel (16) through the upper auxiliary bearing (7) and the lower auxiliary bearing (8), and are in a clearance fit state with the upper auxiliary bearing (7) and the lower auxiliary bearing (8); the permanent magnet thrust bearing (9) is arranged above the flywheel rotating body, and a gap is reserved between the permanent magnet thrust bearing and the upper end surface of the flywheel rotating body; the outer rotor permanent magnet synchronous motor (6) is arranged in the flywheel rotating body and drives the flywheel rotating body to rotate; the upper radial electromagnetic bearing (4) and the lower radial electromagnetic bearing (5) are fixedly arranged on the shell, and the upper radial electromagnetic bearing (4) and the lower radial electromagnetic bearing (5) are in a non-contact state with the outer wall of the flywheel rotating body;
the motor inner stator (20) of the outer rotor permanent magnet synchronous motor (6) is a winding coil, and the motor outer rotor (19) of the outer rotor permanent magnet synchronous motor (6) is a SmCo permanent magnet; the upper auxiliary bearing (7) is axially positioned on the mandrel (16) through the upper fixed shaft sleeve (10); the lower auxiliary bearing (8) is axially positioned on the mandrel (16) through a lower positioning sleeve (17); the upper radial electromagnetic bearing (4) is arranged on the shell through an upper electromagnetic bearing outer stator support (13), and the lower radial electromagnetic bearing (5) is arranged on the shell through a lower electromagnetic bearing outer stator support (14).
2. The cylindrical rotor flywheel energy storage system supported by a combination of permanent magnet bearings and electromagnetic bearings of claim 1, wherein: the flywheel rotator comprises a flywheel (1), a flywheel upper end cover (2) and a flywheel lower end cover (3), wherein the flywheel upper end cover (2) and the flywheel lower end cover (3) are arranged at the upper end and the lower end of the flywheel (1), the flywheel upper end cover (2) is in clearance fit with an upper auxiliary bearing (7), and the flywheel lower end cover (3) is in clearance fit with a lower auxiliary bearing (8).
3. The cylindrical rotor flywheel energy storage system supported by the permanent magnet bearing and the electromagnetic bearing in a mixed mode according to claim 2, wherein: the gaps between the upper radial electromagnetic bearing (4), the lower radial electromagnetic bearing (5) and the outer wall of the flywheel rotating body are 0.5-1 mm.
4. A cylindrical rotor flywheel energy storage system as claimed in claim 3 wherein the permanent magnet bearing and electromagnetic bearing are mixedly supported, and wherein: the gaps between the upper end and the lower end of the flywheel rotating body and the upper auxiliary bearing (7) and the lower auxiliary bearing (8) are 0.1-0.5 mm.
5. The cylindrical rotor flywheel energy storage system supported by the combination of the permanent magnet bearing and the electromagnetic bearing according to claim 4, wherein: permanent magnets (18) are embedded in the permanent magnet thrust bearing (9).
6. The cylindrical rotor flywheel energy storage system supported by the combination of the permanent magnet bearing and the electromagnetic bearing according to claim 5, wherein: the upper radial electromagnetic bearing (4) and the lower radial electromagnetic bearing (5) are identical in structure and comprise a stator coil (21) and a silicon steel sheet rotor (22) arranged in the stator coil (21), the stator coil (21) is an outer stator of the electromagnetic bearing, the silicon steel sheet rotor (22) is an electromagnetic bearing inner rotor, and a gap is reserved between the stator coil (21) and the silicon steel sheet rotor (22).
7. The cylindrical rotor flywheel energy storage system supported by a combination of permanent magnet bearings and electromagnetic bearings of claim 6, wherein: the shell comprises an upper shell (11) and a lower shell (12), the upper shell and the lower shell are connected through bolts (15), the inside of the shell is kept in a vacuum state, and the vacuum degree is at least 0.1Pa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811487119.0A CN109450158B (en) | 2018-12-06 | 2018-12-06 | Cylindrical rotor flywheel energy storage system with permanent magnet bearing and electromagnetic bearing mixed support |
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| CN201811487119.0A CN109450158B (en) | 2018-12-06 | 2018-12-06 | Cylindrical rotor flywheel energy storage system with permanent magnet bearing and electromagnetic bearing mixed support |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110149025A (en) * | 2019-05-10 | 2019-08-20 | 四川一贝动力科技有限公司 | The integral structure of stored energy mechanism and motor outer rotor |
| CN113037001B (en) * | 2021-02-22 | 2022-08-23 | 江苏大学 | Flywheel energy storage device based on outer rotor bearingless permanent magnet synchronous motor |
| CN115199705B (en) * | 2022-05-31 | 2023-06-16 | 北京信息科技大学 | Multifunctional energy storage flywheel system with damping energy recovery and online modal monitoring functions |
| CN116094240B (en) * | 2023-04-07 | 2023-07-25 | 坎德拉(深圳)新能源科技有限公司 | Flywheel energy storage device and rotary mechanical device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002095209A (en) * | 2000-09-14 | 2002-03-29 | Mitsubishi Heavy Ind Ltd | Flywheel apparatus for storing electric power |
| JP2005240963A (en) * | 2004-02-27 | 2005-09-08 | Ebara Corp | Flywheel type energy storing device |
| CN102437675A (en) * | 2011-10-13 | 2012-05-02 | 山东科技大学 | Energy storage device of magnetic suspension flywheel |
| CN102878202A (en) * | 2012-10-11 | 2013-01-16 | 清华大学 | Heavy-load vertical hybrid magnetic-levitation supporting system applied to flywheel energy storage |
| CN203035756U (en) * | 2012-10-11 | 2013-07-03 | 清华大学 | Heavy-load vertical mixed magnetic suspension supporting system applied to flywheel energy storage |
| CN104410204A (en) * | 2014-11-28 | 2015-03-11 | 江苏大学 | Novel flywheel energy storage device |
| CN105591492A (en) * | 2014-10-31 | 2016-05-18 | 张瑞彬 | Vertical type magnetic suspension flywheel energy storage system |
| CN208924014U (en) * | 2018-12-06 | 2019-05-31 | 哈尔滨电气股份有限公司 | The cylindrical rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5992403B2 (en) * | 2010-06-08 | 2016-09-14 | テンポラル・パワー・リミテッドＴｅｍｐｏｒａｌ Ｐｏｗｅｒ Ｌｔｄ． | Flywheel energy system |
-
2018
- 2018-12-06 CN CN201811487119.0A patent/CN109450158B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002095209A (en) * | 2000-09-14 | 2002-03-29 | Mitsubishi Heavy Ind Ltd | Flywheel apparatus for storing electric power |
| JP2005240963A (en) * | 2004-02-27 | 2005-09-08 | Ebara Corp | Flywheel type energy storing device |
| CN102437675A (en) * | 2011-10-13 | 2012-05-02 | 山东科技大学 | Energy storage device of magnetic suspension flywheel |
| CN102878202A (en) * | 2012-10-11 | 2013-01-16 | 清华大学 | Heavy-load vertical hybrid magnetic-levitation supporting system applied to flywheel energy storage |
| CN203035756U (en) * | 2012-10-11 | 2013-07-03 | 清华大学 | Heavy-load vertical mixed magnetic suspension supporting system applied to flywheel energy storage |
| CN105591492A (en) * | 2014-10-31 | 2016-05-18 | 张瑞彬 | Vertical type magnetic suspension flywheel energy storage system |
| CN104410204A (en) * | 2014-11-28 | 2015-03-11 | 江苏大学 | Novel flywheel energy storage device |
| CN208924014U (en) * | 2018-12-06 | 2019-05-31 | 哈尔滨电气股份有限公司 | The cylindrical rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing |
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| CN109450158A (en) | 2019-03-08 |
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