CN109510381A - The ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing - Google Patents
The ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing Download PDFInfo
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- CN109510381A CN109510381A CN201811487090.6A CN201811487090A CN109510381A CN 109510381 A CN109510381 A CN 109510381A CN 201811487090 A CN201811487090 A CN 201811487090A CN 109510381 A CN109510381 A CN 109510381A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 41
- 230000001360 synchronised effect Effects 0.000 claims abstract description 26
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 230000004323 axial length Effects 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 description 8
- 230000005389 magnetism Effects 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
永磁轴承与电磁轴承混合支承的阶梯变截面转子飞轮储能系统，属于飞轮储能技术领域。本发明解决了现有的飞轮储能系统存在的飞轮转子的轴向长度，影响转子动力力学特性并将导致飞轮储能系统结构紧凑性欠佳的问题，本发明永磁推力轴承、上辅助轴承、外转子永磁同步电机和下辅助轴承安装在芯轴上，飞轮旋转体的上端和下端与上辅助轴承和下辅助轴承呈间隙配合状态；永磁推力轴承与飞轮旋转体的上端面间留有间隙；外转子永磁同步电机置于飞轮旋转体内，带动飞轮旋转体旋转；上径向电磁轴承、下径向电磁轴承固定安装在壳体上，径向电磁轴承与飞轮旋转体外壁呈无接触状态，飞轮主体为阶梯变截面结构。本发明转子系统结构紧凑，提升转子动力学特性。
The utility model relates to a rotor flywheel energy storage system with a stepped variable section supported by a permanent magnet bearing and an electromagnetic bearing, belonging to the technical field of flywheel energy storage. The invention solves the problem that the axial length of the flywheel rotor in the existing flywheel energy storage system affects the dynamic characteristics of the rotor and leads to the poor compactness of the flywheel energy storage system. The permanent magnet thrust bearing and the upper auxiliary bearing of the present invention , The outer rotor permanent magnet synchronous motor and the lower auxiliary bearing are installed on the mandrel, the upper and lower ends of the flywheel rotating body are in a clearance fit state with the upper and lower auxiliary bearings; the permanent magnet thrust bearing and the upper end face of the flywheel rotating body are kept between There is a gap; the outer rotor permanent magnet synchronous motor is placed in the rotating body of the flywheel, which drives the rotating body of the flywheel to rotate; the upper radial electromagnetic bearing and the lower radial electromagnetic bearing are fixedly installed on the shell, and the radial electromagnetic bearing and the outer wall of the flywheel rotating body are free from each other. In the contact state, the main body of the flywheel is a stepped variable section structure. The rotor system of the invention has a compact structure and improves the dynamic characteristics of the rotor.
Description
Technical field
The present invention relates to a kind of flywheel energy storage systems, and in particular to a kind of rank of Permanent-magnet bearing and electromagnetic bearing mixing bearing
Terraced variable cross-section rotor flywheel energy storage system, belongs to Flywheel energy storage technique field.
Background technique
Flywheel energy storage system as one can flexible modulation active source, be actively engaged in the dynamic behaviour of system, and can be
The of short duration state transient process of Eliminating disturbance retraction, makes system restore stable state rapidly.Flywheel energy storage system mainly by flywheel rotor,
The composition such as bearing, integrated electric/power generation mutual-inverse type either-rotation motor, electronic power converter.Integrated electric/power generation mutual-inverse type
Either-rotation motor realizes that electric energy and high speed flywheel mechanical energy are converted.Electric energy accelerates energy storage by electric power converter driving motor, flywheel；
Later, the constant operating of motor can control signal until receiving to release；Energy is released in the power generation of high speed flywheel dragging motor, and converted device output is suitable
In the electric current and voltage of load.
To store more energy, reduce system loss, flywheel rotor needs to have biggish rotary inertia, and in vacuum ring
High rotation speed operation is under border.As a kind of electromechanical integration energy storing devices for integrating the technologies such as machinery, control, electronics,
Flywheel energy storage system there is also many technical problems for restricting its engineering application, mainly finds expression in the choosing of suspension bearing system at present
Type, integrated electric/generator performance and control etc..If flywheel energy storage system takes installation inner rotor motor, and using more
A magnetic suspension bearing bearing, it will usually which the axial length for increasing flywheel rotor influences rotor dynamic mechanical characteristic and will lead to winged
It is not good enough to take turns energy-storage system structural compactness.
Summary of the invention
It has been given below about brief overview of the invention, in order to provide about the basic of certain aspects of the invention
Understand.It should be appreciated that this summary is not an exhaustive overview of the invention.It is not intended to determine pass of the invention
Key or pith, nor is it intended to limit the scope of the present invention.Its purpose only provides certain concepts in simplified form,
Taking this as a prelude to a more detailed description discussed later.
In consideration of it, the present invention influences to solve the axial length of flywheel rotor existing for existing flywheel energy storage system
Rotor dynamic mechanical characteristic simultaneously will lead to the not good enough problem of flywheel energy storage system structural compactness, and then devise a kind of permanent magnetism axis
The ladder variable cross-section rotor flywheel energy storage system with electromagnetic bearing mixing bearing is held, which uses external rotor permanent magnet synchronous machine
With Permanent-magnet bearing mixing bearing.
Scheme adopted by the present invention are as follows: the ladder variable cross-section rotor flywheel of Permanent-magnet bearing and electromagnetic bearing mixing bearing stores up
Energy system, including energy storage transform portion, rotor bearing part and slave part；
Wherein, energy storage transform portion includes flywheel rotary body and external rotor permanent magnet synchronous machine 6；Rotor bearing part
Including upper radial magnetic bearing, lower radial magnetic bearing, upper auxiliary bearing, lower auxiliary bearing and thrust magnetic bearing；Assisted parts
Divide includes shell and mandrel；
Wherein, the mandrel and flywheel rotary body are mounted in shell, and enclosure interior keeps vacuum state；Flywheel main body is
Ladder variable section structure, the ladder variable section structure are the ladder along flywheel horizontal centre reduced diameter up and down
Structure, vertical plane transition between ladder；The thrust magnetic bearing, upper auxiliary bearing, external rotor permanent magnet synchronous machine and lower auxiliary
Bearing is installed on mandrel, and is from top to bottom successively arranged along axial direction；Upper auxiliary bearing, lower auxiliary bearing, external rotor permanent magnet
The inner stator of synchronous motor is fixedly arranged on mandrel；The top and bottom of flywheel rotary body are auxiliary under by upper auxiliary bearing
It helps bearing and mandrel to establish connection, and is in clearance fit state with upper auxiliary bearing and lower auxiliary bearing；The permanent magnetism thrust axis
There are gaps above flywheel rotary body, and between the upper surface of flywheel rotary body for bearing；The external rotor permanent magnet synchronous machine
It is placed in flywheel a rotating body, and drives the rotation of flywheel rotary body；The fixed peace of the upper radial magnetic bearing, lower radial magnetic bearing
On shell, and upper radial magnetic bearing, lower radial magnetic bearing and flywheel rotary body outer wall are in contactless state.
Further: the flywheel rotary body includes flywheel, flywheel upper end cover and flywheel lower cover, the installation of flywheel upper and lower side
There are flywheel upper end cover and flywheel lower cover, flywheel upper end cover and upper auxiliary bearing clearance fit, flywheel lower cover and lower asessory shaft
Hold clearance fit.
Further: the flywheel rotary body is steel alloy flywheel rotary body.
Further: the gap between the upper radial magnetic bearing, lower radial magnetic bearing and flywheel rotary body outer wall
For 0.5~1mm.So set, flywheel rotary body is controlled by electromagnetic force, contacts with each other with bearing without radial, is in suspended state,
Mechanical friction abrasion is greatly reduced, radial support and active control are carried out to flywheel rotary body, can guarantee that bearing supports well
Stability.
Further: the gap between the top and bottom of the flywheel rotary body and upper auxiliary bearing and lower auxiliary bearing
For 0.1~0.5mm.So set, flywheel rotary body is controlled by electromagnetic force, contacts with each other with bearing without axial, be in suspension
State greatly reduces mechanical friction abrasion.
Further: being embedded in permanent magnet in the thrust magnetic bearing.So set, can be carried out to flywheel rotary body axial
Unloading.
Further: the gap between the thrust magnetic bearing and the upper surface of flywheel rotary body is 0.5~1mm.Such as
This setting, flywheel rotary body are controlled by magnetic force, are contacted with each other with thrust magnetic bearing without axial, are in suspended state, greatly subtract
Few mechanical friction abrasion, and thrust magnetic bearing is that flywheel rotor carries out axial unloading, and it is axially negative can greatly to mitigate electromagnetic bearing
It carries.
Further: the electric motor internal stator of the external rotor permanent magnet synchronous machine is wound around coil, and external rotor permanent magnet is synchronous
The motor outer rotor of motor is SmCo permanent magnet.
Further: the upper auxiliary bearing is axially positioned on mandrel by upper fixed hub, and lower auxiliary bearing passes through
Lower positioning sleeve is axially positioned on mandrel；Upper radial magnetic bearing is mounted on shell by the bearing of upper electromagnetic bearing external stator,
Lower radial magnetic bearing is mounted on shell by the bearing of lower electromagnetic bearing external stator.So set, magnet upper and lower end face is by solid
Dead axle set constraint fastening, and permanent magnetism external surface is by flywheel a rotating body surface protection.
Further: the upper radial magnetic bearing is identical as lower radial magnetic bearing structure, including stator coil and sets
Silicon steel sheet rotor inside stator coil, stator coil are the external stator of electromagnetic bearing, and silicon steel sheet rotor is in electromagnetic bearing
Rotor, there are gaps between stator coil and silicon steel sheet rotor.It is designed in this way, Active Magnetic Bearing facilitates compact-sizedization and sets
Meter.
Further: the upper auxiliary bearing and lower auxiliary bearing use rolling bearing.The outer ring axial face of rolling bearing
With outer radial surface respectively at flywheel upper end cover and flywheel lower cover there are gap, which is less than stator coil and silicon steel sheet turns
Gap between son.The inner ring of upper auxiliary bearing and lower auxiliary bearing is fixed, when rotor falls or needs repairing, asessory shaft
Bearing outer-ring bears rotor strike, and rotor is avoided to contact with electromagnetic bearing.
Further: the shell includes upper housing and lower case, and the two is connected by bolt, and enclosure interior keeps true
Dummy status, vacuum degree are at least 0.1Pa.Vacuum environment can effectively reduce windage when high speed rotor rotation, reduce rotor rotation
When friction, be effectively reduced mechanical loss, improve energy storage efficiency.
Present invention effect achieved are as follows:
The present invention selects external rotor permanent magnet synchronous machine as integrated electric/power generation mutual-inverse type either-rotation motor, can make to turn
Subsystem structure is compact, promotes rotor dynamics.Meanwhile flywheel is played a certain protective role also for permanent magnetic tile.
Forced water cooling mode may be selected in electric motor internal stator radiating mode.Flywheel rotor is carried out using novel external rotor Active Magnetic Bearing
Radial support and active control, Permanent-magnet bearing are that flywheel rotor carries out axial unloading, it is ensured that the stability of bearing bearing is reduced
Friction reduces vibration, and further compact systems spatial constructional dimensions, is conducive to system compact design.
Specifically: flywheel energy storage system of the invention utilizes upper radial magnetic bearing, lower radial magnetic bearing, upper asessory shaft
It holds, lower auxiliary bearing and thrust magnetic bearing are by the contactless suspension of flywheel rotary body, the axial displacement of flywheel rotary body, radial position
It moves and is controlled around the rotation of horizontal plane x-axis and y-axis by upper radial magnetic bearing and lower radial magnetic bearing, and flywheel rotates
The axial-rotation of body is controlled by external rotor permanent magnet synchronous machine.It is designed in this way, flywheel rotary body is in space under contactless state
It realizes high speed rotation, is in the full suspended state of friction free, can well avoid high speed rotor frictional dissipation, and vacuum environment can
Effectively reduce windage loss.External rotor permanent magnet synchronous machine is installed on inside flywheel rotary body, in contrast to electric in inner rotor motor system
Machine and flywheel cascaded structure, considerably reduce axle-system axial size, compact-sized, reduce rotor oscillation.Upper auxiliary bearing and
Lower auxiliary bearing provides interim aiding support for rotor, prevents thrashing, and rotor falls to be collided with electromagnetic bearing, rises for rotor
To the effect of limit and protection.
Detailed description of the invention
Fig. 1 is the ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing of the invention
Structure chart；
Fig. 2 is the structure chart of flywheel；
Fig. 3 is the structure chart of external rotor permanent magnet synchronous machine；
Fig. 4 is radial magnetic bearing structure diagram；
Fig. 5 is auxiliary bearing arrangement schematic diagram.
In figure:
1- flywheel；2- flywheel upper end cover；3- flywheel lower cover；The upper radial magnetic bearing of 4-；Radial magnetic bearing under 5-；6-
External rotor permanent magnet synchronous machine；The upper auxiliary bearing of 7-；Auxiliary bearing under 8-；9- thrust magnetic bearing；10- permanent magnet；11- upper casing
Body；12- lower case；The upper electromagnetic bearing external stator bearing of 13-；Electromagnetic bearing external stator supports under 14-；15- bolt, it is solid on 16-
Dead axle set；Fixed hub under 17-；18- mandrel；19- motor outer rotor；20- electric motor internal stator；21- stator coil；22- silicon steel
Piece rotor.
Specific embodiment
For clarity and conciseness, all features of actual implementation mode are not described in the description.However, should
Understand, much decisions specific to embodiment must be made, during developing any this practical embodiments so as to reality
The objectives of existing developer, for example, meeting restrictive condition those of related to system and business, and these restrictive conditions
It may be changed with the difference of embodiment.In addition, it will also be appreciated that although development is likely to be very multiple
It is miscellaneous and time-consuming, but for the those skilled in the art for having benefited from the disclosure of invention, this development is only example
Capable task.
Here, also it should be noted is that, in order to avoid having obscured the present invention because of unnecessary details, applying for text
Illustrate only in part with closely related apparatus structure and/or processing step according to the solution of the present invention, and be omitted and this
The little other details of inventive relationship.
Embodiment: referring to Fig. 1 to Fig. 5, the ladder of Permanent-magnet bearing and electromagnetic bearing mixing bearing in the present embodiment, which becomes, to be cut
Face rotor flywheel energy storage system, including energy storage transform portion, rotor bearing part and slave part；Wherein, energy storage
Transform portion includes: flywheel rotary body, integrated electric/power generation mutual-inverse type either-rotation motor；Rotator abutment point includes: upper radial direction
Electromagnetic bearing 4, lower radial magnetic bearing 5, thrust magnetic bearing 9, upper auxiliary bearing 7, lower auxiliary bearing 8；Slave part includes:
Shell and mandrel 18.
Wherein, integrated electric/power generation mutual-inverse type either-rotation motor selects external rotor permanent magnet synchronous machine 6, permanent magnetism thrust axis
It holds 9, upper auxiliary bearing 7, external rotor permanent magnet synchronous machine 6, lower auxiliary bearing 8 to be mounted on mandrel 18, in axial direction from top to bottom
Successively arrange.
Upper auxiliary bearing 7, lower auxiliary bearing 8, external rotor permanent magnet synchronous machine 6 inner stator be fixedly arranged at mandrel 18
On.Upper radial magnetic bearing, lower radial magnetic bearing are fixedly mounted on shell, and upper radial magnetic bearing, lower radial electromagnetism
Bearing and flywheel rotary body outer wall are in contactless state.Enclosure interior keeps vacuum state.
Above-mentioned flywheel energy storage system using radial magnetic bearing and thrust magnetic bearing by the contactless suspension of flywheel rotary body,
High speed rotor frictional dissipation can be well avoided, and vacuum environment can effectively reduce windage loss.
Flywheel rotary body material is steel alloy, and flywheel 1 is connected with flywheel upper end cover 2, flywheel lower cover 3 by bolt
Connect, the axial displacement of flywheel rotary body, radial displacement and around horizontal plane x-axis and y-axis rotation by upper radial magnetic bearing 4,
Lower radial magnetic bearing 5 is controlled, and its axial-rotation is controlled by external rotor permanent magnet synchronous machine 6.
It is embedded in permanent magnet 10 in thrust magnetic bearing 9, axial unloading can be carried out to flywheel rotary body.Thrust magnetic bearing 9
There are minim gaps between flywheel rotary body, are not in contact with each other.Meanwhile upper radial magnetic bearing 4 and lower radial magnetic bearing 5
Radial support and active control are carried out to flywheel 1, can well guarantee the stability of bearing bearing.Flywheel rotary body is pushed away by permanent magnetism
The bearing of power bearing and upper radial magnetic bearing 4, lower radial magnetic bearing 5 can be realized under contactless state high in space
Speed rotation, is in the full suspended state of friction free.
Integrated electric/power generation mutual-inverse type either-rotation motor selection selection external rotor permanent magnet synchronous machine 6.External rotor permanent magnet is same
Walk the core component that motor 6 is electric energy conversion.When energy storage, electric energy drives flywheel to add by electric power converter driving motor, motor
Speed rotation, the machinery that electric energy is converted into flywheel can be carried out energy storage；The constant operating of motor later can control signal until receiving to release；It releases
When energy, the power generation of high speed flywheel dragging motor is suitable for the electric current and voltage of load through electric power converter output.
The upper auxiliary bearing 7 is axially positioned on mandrel 18 by upper fixed hub 16；It is lower fixed that lower auxiliary bearing 8 passes through
Position set 17 is axially positioned on mandrel 18；Upper radial magnetic bearing 4 is mounted on shell by upper electromagnetic bearing external stator bearing 13
On, lower radial magnetic bearing 5 is mounted on shell by lower electromagnetic bearing external stator bearing 14.
1 main body of flywheel is ladder variable section structure (as shown in Figure 2), has larger inertia, and flywheel rotary body is to close
Golden Steel material.The ladder variable section structure is the hierarchic structure along flywheel horizontal centre reduced diameter up and down,
Vertical plane transition between ladder.
The external rotor permanent magnet synchronous machine 6 uses outer-rotor structure form (Fig. 3), and motor can be installed on to flywheel rotation
Body interior greatly reduces axle-system axial size, compact-sized, improves rotor dynamics, reduces rotor oscillation.Wherein,
20 be electric motor internal stator, is wound around coil；19 be motor outer rotor, is permanent magnet S mCo.
The upper radial magnetic bearing 4 and lower 5 structure of radial magnetic bearing as shown in figure 4, upper radial magnetic bearing 4 under
5 structure of radial magnetic bearing is identical, including stator coil 21 and the silicon steel sheet rotor 22 being placed in inside stator coil 21, stator line
Circle 21 is the external stator of electromagnetic bearing, and silicon steel sheet rotor 22 is electromagnetic bearing internal rotor, stator coil 21 and silicon steel sheet rotor 22
Between there are gaps.External rotor radial electromagnetic bearing facilitates compact-sizedization design.
Meanwhile auxiliary bearing 7 and lower auxiliary bearing 8 are installed respectively in the upper/lower terminal of flywheel rotary body, it is mentioned for rotor
It for interim aiding support, prevents thrashing rotor from falling and is collided with electromagnetic bearing, play the role of limit and protection for rotor.
Upper auxiliary bearing 7 and lower auxiliary bearing 8 are as shown in Figure 5 respectively.Upper auxiliary bearing 7 and the selection rolling of lower auxiliary bearing 8
Dynamic bearing.There are between small with flywheel upper end cover 2 and flywheel lower cover 3 respectively for housing washer axial face and outer radial surface
Gap, and the gap is less than the gap between stator coil 21 and silicon steel sheet rotor 22.Auxiliary bearing inner ring is fixed, when rotor falls
Or when needing repairing, rotor strike is born in auxiliary bearing outer ring, and rotor is avoided to contact with electromagnetic bearing.
To reduce windage friction when flywheel rotor high speed rotation, system capacity transfer efficiency, system casing is effectively ensured
It inside needs to keep vacuum state.The shell includes upper housing 11 and lower case 12, and the two is connected by bolt 15.
Although disclosed embodiment is as above, its content is only to facilitate understand technical side of the invention
Case and the embodiment used, are not intended to limit the present invention.Any those skilled in the art to which this invention pertains, not
Under the premise of being detached from disclosed core technology scheme, any modification and change can be made in form and details in implementation
Change, but protection scope defined by the present invention, the range that the appended claims that must still be subject to limits.
Claims (10)
1. the ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing, including energy storage conversion
Partially, rotor bearing part and slave part；
It is characterized by: the energy storage transform portion includes flywheel rotary body and external rotor permanent magnet synchronous machine (6)；Rotor
Supporting part include upper radial magnetic bearing (4), lower radial magnetic bearing (5), upper auxiliary bearing (7), lower auxiliary bearing (8) and
Thrust magnetic bearing (9)；Slave part includes shell and mandrel (18)；
Wherein, the mandrel (18) and flywheel rotary body are mounted in shell, and enclosure interior keeps vacuum state；Flywheel main body is
Ladder variable section structure, the ladder variable section structure are the ladder along flywheel horizontal centre reduced diameter up and down
Structure, vertical plane transition between ladder；The thrust magnetic bearing (9), upper auxiliary bearing (7), external rotor permanent magnet synchronous machine (6)
It is installed on mandrel (18) with lower auxiliary bearing (8), and from top to bottom successively arranges along axial direction；Upper auxiliary bearing (7), under it is auxiliary
The inner stator of bearing (8), external rotor permanent magnet synchronous machine (6) is helped to be fixedly arranged on mandrel (18)；Flywheel rotary body it is upper
Connection is established by upper auxiliary bearing (7) and lower auxiliary bearing (8) and mandrel (18) in end and lower end, and with upper auxiliary bearing (7)
It is in clearance fit state with lower auxiliary bearing (8)；The thrust magnetic bearing (9) is placed in above flywheel rotary body, and and flywheel
There are gaps between the upper surface of rotary body；The external rotor permanent magnet synchronous machine (6) is placed in flywheel a rotating body, and drives flywheel
Rotary body rotation；The upper radial magnetic bearing (4), lower radial magnetic bearing (5) are fixedly mounted on shell, and upper radial electricity
Magnetic bearing (4), lower radial magnetic bearing (5) and flywheel rotary body outer wall are in contactless state.
2. the ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing according to claim 1 and electromagnetic bearing mixing bearing
System, it is characterised in that: the flywheel rotary body includes flywheel (1), flywheel upper end cover (2) and flywheel lower cover (3), flywheel (1)
Upper and lower side is equipped with flywheel upper end cover (2) and flywheel lower cover (3), and flywheel upper end cover (2) is matched with upper auxiliary bearing (7) gap
It closes, flywheel lower cover (3) and lower auxiliary bearing (8) clearance fit.
3. the ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing according to claim 2 and electromagnetic bearing mixing bearing
System, it is characterised in that: between the upper radial magnetic bearing (4), lower radial magnetic bearing (5) and flywheel rotary body outer wall
Gap is 0.5~1mm.
4. the ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing according to claim 3 and electromagnetic bearing mixing bearing
System, it is characterised in that: between the top and bottom and upper auxiliary bearing (7) and lower auxiliary bearing (8) of the flywheel rotary body
Gap is 0.1~0.5mm.
5. the ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing according to claim 4 and electromagnetic bearing mixing bearing
System, it is characterised in that: be embedded in permanent magnet (10) in the thrust magnetic bearing (9).
6. the ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing according to claim 5 and electromagnetic bearing mixing bearing
System, it is characterised in that: the gap between the thrust magnetic bearing (9) and the upper surface of flywheel rotary body is 0.5~1mm.
7. the ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing according to claim 6 and electromagnetic bearing mixing bearing
System, it is characterised in that: the electric motor internal stator (20) of the external rotor permanent magnet synchronous machine (6) is wound around coil, external rotor permanent magnet
The motor outer rotor (19) of synchronous motor (6) is SmCo permanent magnet.
8. the ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing according to claim 7 and electromagnetic bearing mixing bearing
System, it is characterised in that: the upper auxiliary bearing (7) is axially positioned on mandrel (18) by upper fixed hub (16)；Lower auxiliary
Bearing (8) is axially positioned on mandrel (18) by lower positioning sleeve (17)；Upper radial magnetic bearing (4) by upper electromagnetic bearing outside
Stator bearing (13) is mounted on shell, and lower radial magnetic bearing (5) supports (14) by lower electromagnetic bearing external stator and is mounted on
On shell.
9. the ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing according to claim 8 and electromagnetic bearing mixing bearing
System, it is characterised in that: the upper radial magnetic bearing (4) is identical as lower radial magnetic bearing (5) structure, including stator coil
(21) and it is placed in the internal silicon steel sheet rotor (22) of stator coil (21), stator coil (21) is the external stator of electromagnetic bearing, silicon
Steel disc rotor (22) is electromagnetic bearing internal rotor, and there are gaps between stator coil (21) and silicon steel sheet rotor (22).
10. the ladder variable cross-section rotor flywheel energy storage of Permanent-magnet bearing according to claim 9 and electromagnetic bearing mixing bearing
System, it is characterised in that: the shell includes upper housing (11) and lower case (12), and the two is connected by bolt (15), shell
Internal portion keeps vacuum state, and vacuum degree is at least 0.1Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487090.6A CN109510381A (en) | 2018-12-06 | 2018-12-06 | The ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487090.6A CN109510381A (en) | 2018-12-06 | 2018-12-06 | The ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109510381A true CN109510381A (en) | 2019-03-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109450157A (en) * | 2018-12-06 | 2019-03-08 | 哈尔滨电气股份有限公司 | The big energy storage capacity variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109450157A (en) * | 2018-12-06 | 2019-03-08 | 哈尔滨电气股份有限公司 | The big energy storage capacity variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing |
| 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 |
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