CN100487259C - Low power consumption axial magnetic bearing with redundant structure - Google Patents
Low power consumption axial magnetic bearing with redundant structure Download PDFInfo
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- CN100487259C CN100487259C CNB2007100987511A CN200710098751A CN100487259C CN 100487259 C CN100487259 C CN 100487259C CN B2007100987511 A CNB2007100987511 A CN B2007100987511A CN 200710098751 A CN200710098751 A CN 200710098751A CN 100487259 C CN100487259 C CN 100487259C
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- bearing support
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Abstract
A low power axial magnetic bearing with redundant structure is characterized in that it is composed of bearing body, exciting coils, permanent magnet, magnetic ring, air gap, auxiliary air gap and suspension body. The permanent magnet clings to the bearing body to generate bias flux, the magnetic ring clings to the permanent magnet and forms the auxiliary air gap with the bearing body, the air gap is formed among the magnetic ring, the bearing body pole and the suspension body to generate bias flux, the bearing body is winded with two groups of the exciting coils to generate control flux, the exciting coil, the permanent body and the magnetic ring are formed to redundant axial magnetic bearing stators relative to each other. The invention realizes the redundancy for the structure of the permanent bias axial magnetic bearing, prevents the electromagnetic magnetic path from passing the internal part of the permanent body, and reduces the exciting current. The invention has high reliability and low power consumption, and can work as non-contact support for the rotating components in the flywheel and other devices.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly a kind of low power consumption axial magnetic bearing with redundancy structure can be used as the contactless supporting part of rotary component in the systems such as magnetically levitated flywheel, magnetic suspension control torque gyroscope, aeroengine, molecular pump, high-speed machine tool and satellite.
Background technique
Since magnetic suspension bearing have contactless, need not lubricate, the life-span is long, noise is little, the control accuracy advantages of higher, can be widely used in fields such as Aeronautics and Astronautics and machining.Require the field of high reliability in aeroengine, astrovehicle etc.,, require magnetic levitation bearing system to have redundancy and fault tolerance for improving the reliability of magnetic levitation bearing system.The permanent-magnetic biased axial magnetic bearing of existing structure adopts permanent magnet to produce bias magnetic field, but can not realize redundancy, so reliability is low.And existing axial magnetic bearing with redundancy structure adopts the active magnetic bearings structure, promptly in a bearing support, realize redundancy structure by two groups of field coils of coiling, its structural representation as shown in Figure 1, when a certain group of field coil 11 breaks down, another group field coil 12 can proper functioning, owing to produce bias magnetic field by electric current, so there is the big shortcoming of power consumption.
Summary of the invention
Technical problem to be solved by this invention is: overcome the deficiencies in the prior art, provide a kind of power consumption with redundancy structure little, be easy to control and the low power consumption axial magnetic bearing of high reliability.
One of technical solution of the present invention is: a kind of low power consumption axial magnetic bearing with redundancy structure, it is characterized in that: by bearing support, field coil, permanent magnet, magnetic guiding loop, air gap, auxiliary air gap and suspension are formed, permanent magnet is close to bearing support, magnetic guiding loop be close on the permanent magnet and and bearing support between form auxiliary air gap, bearing support comprises external magnetic poles and middle part magnetic pole, external magnetic poles, the middle part magnetic pole, form air gap between magnetic guiding loop and the suspension, external magnetic poles, the middle part magnetic pole, form air gap between magnetic guiding loop and the suspension, permanent magnet produces the biasing magnetic flux in air gap, two groups of field coils of coiling in the bearing support, field coil is used for producing control magnetic flux, field coil, permanent magnet and magnetic guiding loop are formed redundant each other axial magnetic bearing stator.Axial magnetic bearing stator of the present invention should use in a device in pairs, and forms redundant each other axial magnetic bearing with suspension.
The principle of such scheme is: provide bias magnetic field by permanent magnet to magnetic bearing, the electromagnetic field that field coil produced plays regulating action, be used for changing every power of extremely descending magnetic field, keep the air gap between the magnetic bearing rotor even, and make suspension obtain contactless stable support.Axial magnetic bearing stator of the present invention is two groups of field coils of coiling in bearing support, these two groups of field coils, magnetic pole of the stator, permanent magnet and magnetic guiding loop are formed redundant each other axial magnetic bearing stator, when one group of field coil energising proper functioning on the axial magnetic bearing stator, the obstructed excess current of another group field coil is as standby field coil.The magnetic circuit of axial magnetic bearing is divided into permanent magnetic circuit and electromagnetic circuit, and permanent magnetic circuit produces biasing magnetic flux (as shown in phantom in Figure 2) in air gap, and electromagnetic circuit produces control magnetic flux (shown in solid line among Fig. 2), is example explanation magnetic circuit with an axial magnetic bearing stator.Permanent magnetic circuit is divided into two-way, and wherein one road permanent magnetic circuit is: magnetic flux is got back to the permanent magnet S utmost point by middle part magnetic pole, air gap, suspension, air gap and the magnetic guiding loop of bearing support, bearing support, shown in the dotted line among Fig. 2 from the permanent magnet N utmost point; Another road permanent magnetic circuit is: magnetic flux is got back to the permanent magnet S utmost point by external magnetic poles, air gap, suspension, air gap and the magnetic guiding loop of bearing support, bearing support, shown in the dotted line among Fig. 2 from the permanent magnet N utmost point.Electromagnetic circuit also is divided into two-way, the electric current that produces with the inner field coil of bearing support is an example, wherein one the tunnel is: the electromagnetism magnetic flux constitutes the closed-loop path through middle part magnetic pole, air gap, suspension, air gap, magnetic guiding loop and the auxiliary air gap of bearing support, bearing support, shown in the solid line among Fig. 2; Another road is: the electromagnetism magnetic flux constitutes the closed-loop path through external magnetic poles, air gap, suspension, air gap, magnetic guiding loop and the auxiliary air gap of bearing support, bearing support, shown in the solid line among Fig. 2.The permanent magnetic circuit of standby axial magnetic bearing is identical with the permanent magnetic circuit of proper functioning axial magnetic bearing, and electromagnetic circuit also is divided into two-way, wherein one the tunnel is: the middle part magnetic pole and the bearing support of the external magnetic poles of electromagnetism magnetic flux process bearing support, air gap, suspension, air gap, bearing support constitute the closed-loop path, shown in the solid line among Fig. 4; Another road is: the electromagnetism magnetic flux constitutes the closed-loop path through external magnetic poles, air gap, suspension, air gap, magnetic guiding loop, auxiliary air gap and the bearing support of bearing support, shown in the solid line among Fig. 4.When one of axial magnetic bearing group of field coil broke down therein, another was organized standby field coil and enters normal working, has realized the redundancy of axial magnetic bearing, thereby had guaranteed the high reliability of magnetic bearing system.
Two of technical solution of the present invention is: a kind of low power consumption axial magnetic bearing with redundancy structure, it is characterized in that: by bearing support, field coil, permanent magnet, magnetic guiding loop, air gap, auxiliary air gap and suspension are formed, permanent magnet is close to bearing support, magnetic guiding loop be close on the permanent magnet and and bearing support between form auxiliary air gap, bearing support comprises middle part magnetic pole and interior permanent magnet, interior permanent magnet, the middle part magnetic pole, form air gap between magnetic guiding loop and the suspension, permanent magnet produces the biasing magnetic flux in air gap, two groups of field coils of coiling in the bearing support, field coil is used for producing control magnetic flux, field coil, permanent magnet and magnetic guiding loop are formed redundant each other axial magnetic bearing stator.Axial magnetic bearing stator of the present invention should use in a device in pairs, and axial magnetic bearing stator and suspension are formed redundant each other axial magnetic bearing.Scheme two is compared with scheme one, and permanent magnet moves to the field coil radially outer.
The principle of such scheme is: provide bias magnetic field by permanent magnet to magnetic bearing, the electromagnetic field that field coil produced plays regulating action, be used for changing every power of extremely descending magnetic field, keep the air gap between the magnetic bearing rotor even, and make suspension obtain contactless stable support.Axial magnetic bearing stator of the present invention is two groups of field coils of coiling in bearing support, these two groups of field coils, magnetic pole of the stator, permanent magnet and magnetic guiding loop are formed redundant each other axial magnetic bearing stator, when one group of field coil energising proper functioning on the axial magnetic bearing stator, the obstructed excess current of another group field coil is as standby field coil.The magnetic circuit of axial magnetic bearing is divided into permanent magnetic circuit and electromagnetic circuit, and permanent magnetic circuit produces biasing magnetic flux (as shown in phantom in Figure 5) in air gap, and electromagnetic circuit produces control magnetic flux (shown in solid line among Fig. 5), is example explanation magnetic circuit with an axial magnetic bearing stator.Permanent magnetic circuit is divided into two-way, and wherein one road permanent magnetic circuit is: magnetic flux is got back to the permanent magnet S utmost point by middle part magnetic pole, air gap, suspension, air gap and the magnetic guiding loop of bearing support, bearing support, shown in the dotted line among Fig. 5 from the permanent magnet N utmost point; Another road permanent magnetic circuit is: magnetic flux is got back to the permanent magnet S utmost point by interior permanent magnet, air gap, suspension, air gap and the magnetic guiding loop of bearing support, bearing support, shown in the dotted line among Fig. 5 from the permanent magnet N utmost point.Electromagnetic circuit also is divided into two-way, the electric current that produces with the inner field coil of bearing support is an example, wherein one the tunnel is: the electromagnetism magnetic flux becomes the closed-loop path through bearing support interior permanent magnet, air gap, suspension, air gap, bearing support middle part magnetic pole with bearing support, shown in the solid line among Fig. 6; Another road is: the electromagnetism magnetic flux constitutes the closed-loop path through bearing support interior permanent magnet, air gap, suspension, air gap, magnetic guiding loop, auxiliary air gap and bearing support, shown in the solid line among Fig. 5.The permanent magnetic circuit of standby axial magnetic bearing is identical with the permanent magnetic circuit of proper functioning axial magnetic bearing, and electromagnetic circuit also is divided into two-way, wherein one the tunnel is: the electromagnetism magnetic flux constitutes the closed-loop path through interior permanent magnet, air gap, suspension, air gap, magnetic guiding loop, auxiliary air gap and the bearing support of bearing support, shown in the solid line among Fig. 7; Another road is: the electromagnetism magnetic flux constitutes the closed-loop path through middle part magnetic pole, air gap, suspension, air gap, magnetic guiding loop, auxiliary air gap and the bearing support of bearing support, shown in the solid line among Fig. 7.When one of axial magnetic bearing group of field coil broke down therein, another was organized standby field coil and enters normal working, has realized the redundancy of axial magnetic bearing, thereby had guaranteed the high reliability of magnetic bearing system.
The present invention's advantage compared with prior art is: the present invention utilizes two groups of field coils, bearing support and two magnetic pole, permanent magnet and magnetic guiding loop to form redundant each other axial magnetic bearing stator, simple in structure, when wherein one group of field coil breaks down, the standby field coil of another group can enter normal working, thereby has guaranteed the safe and reliable operation of whole system.
Another advantage of the present invention is: low power consumption axial magnetic bearing of the present invention produces bias magnetic field by permanent magnet, and permanent magnetic circuit is separated with electromagnetic circuit by auxiliary air gap, the electromagnetism magnetic flux is without permanent magnet, thereby the electromagnetic circuit magnetic resistance is very low, very little exciting curent just can produce bigger magnetic flux, can significantly reduce the axial magnetic bearing power consumption with redundancy structure.In addition, in axial magnetic bearing, adopt a plurality of magnetic poles, increased the magnetic pole area, improved the bearing capacity of axial magnetic bearing.
Description of drawings
Fig. 1 is the axial active magnetic bearings structural representation with redundancy structure;
Fig. 2 is the axial, cross-sectional view of the low power consumption axial magnetic bearing with redundancy structure of one of the technology of the present invention solution;
Fig. 3 is the axial end figure (along the permanent magnet sectional drawing) of the low power consumption axial magnetic bearing with redundancy structure of one of the technology of the present invention solution;
Fig. 4 is the standby axial magnetic bearing magnetic circuit of the low power consumption axial magnetic bearing with redundancy structure schematic representation of one of the technology of the present invention solution.
Fig. 5 is the axial, cross-sectional view of two the low power consumption axial magnetic bearing with redundancy structure of the technology of the present invention solution;
Fig. 6 is the axial end figure (along the permanent magnet sectional drawing) of two the low power consumption axial magnetic bearing with redundancy structure of the technology of the present invention solution;
Fig. 7 is two the standby axial magnetic bearing magnetic circuit of the low power consumption axial magnetic bearing with redundancy structure schematic representation of the technology of the present invention solution.
Embodiment
As Fig. 2, Fig. 3 and shown in Figure 4, be a kind of low power consumption axial magnetic bearing of one of the technology of the present invention solution, citation form promptly of the present invention with redundancy structure.It is by bearing support 9, field coil 2 and 3, permanent magnet 4, magnetic guiding loop 5, air gap 7, auxiliary air gap 10 and suspension 6 are formed, permanent magnet 4 is close on the bearing support 9, magnetic guiding loop 5 is close on the permanent magnet 4 and with bearing support 9 and is axially forming auxiliary air gap 10, bearing support 9 comprises external magnetic poles 91 and middle part magnetic pole 92, external magnetic poles 91, middle part magnetic pole 92, form air gap 7 between magnetic guiding loop 5 and the suspension 6, permanent magnet 4 produces the biasing magnetic flux in air gap 7, two groups of field coils 2 of coiling and 3 in the bearing support 9, field coil 2 and 3 is used for producing control magnetic flux, one group of field coil 2, permanent magnet 4 and magnetic guiding loop 5 and another group field coil 3, permanent magnet 4 and magnetic guiding loop 5 are formed redundant each other axial magnetic bearing stator.During proper functioning, field coil 2 galvanizations produce the control magnetic flux, field coil 3 obstructed electric currents, and as standby field coil, when field coil 2 broke down, field coil 3 galvanizations produced the control magnetic flux.
As Fig. 5, Fig. 6 and shown in Figure 7, be a kind of low power consumption axial magnetic bearing of two of the technology of the present invention solution with redundancy structure, scheme two is compared with scheme one, and permanent magnet moves to the field coil radially outer.It is by bearing support 9, field coil 2 and 3, permanent magnet 4, magnetic guiding loop 5, air gap 7, auxiliary air gap 10 and suspension 6 are formed, permanent magnet 4 is close on the bearing support 9, magnetic guiding loop 5 is close on the permanent magnet 4 and with bearing support 9 and is axially forming auxiliary air gap 10, bearing support 9 comprises middle part magnetic pole 92 and interior permanent magnet 93, middle part magnetic pole 92, interior permanent magnet 93, form air gap 7 between magnetic guiding loop 5 and the suspension 6, permanent magnet 4 produces the biasing magnetic flux in air gap 7, two groups of field coils 2 of coiling and 3 in the bearing support 9, field coil 2 and 3 is used for producing control magnetic flux, one group of field coil 3, permanent magnet 4 and magnetic guiding loop 5 and another group field coil 2, permanent magnet 4 and magnetic guiding loop 5 are formed redundant each other axial magnetic bearing stator.During proper functioning, field coil 3 galvanizations produce the control magnetic flux, field coil 2 obstructed electric currents, and as standby field coil, when field coil 3 broke down, field coil 2 galvanizations produced the control magnetic flux.
Magnetic guiding loop 5 that the invention described above technological scheme is used and bearing support 9 all adopt the good material of magnetic property to make, as magnetic materials such as electrical pure iron, various low carbon steel, 1J50 and 1J79.The material of permanent magnet 4 is good rare-earth permanent magnet of magnetic property or ferrite permanent magnet, and permanent magnet 4 is an annulus, magnetizes vertically.Field coil 2 and the good electromagnetic wire coiling final vacuum paint-dipping drying of field coil 3 usefulness conduction form.
Claims (8)
1, a kind of low power consumption axial magnetic bearing with redundancy structure, it is characterized in that: by bearing support (9), two groups of field coils (2,3), permanent magnet (4), magnetic guiding loop (5), air gap (7), auxiliary air gap (10) and suspension (6) are formed, permanent magnet (4) is close on the bearing support (9), magnetic guiding loop (5) is close to permanent magnet (4) and upward and with bearing support (9) is axially forming auxiliary air gap (10), bearing support (9) comprises external magnetic poles (91) and middle part magnetic pole (92), external magnetic poles (91), middle part magnetic pole (92), form air gap (7) between magnetic guiding loop (5) and the suspension (6), permanent magnet (4) produces the biasing magnetic flux in air gap (7), two groups of field coils (2 of the interior coiling of bearing support (9), 3), two groups of field coils (2,3) be used for producing control magnetic flux, wherein one group of field coil (2), permanent magnet (4) and magnetic guiding loop (5) and another group field coil (3), permanent magnet (4) and magnetic guiding loop (5) are formed redundant each other axial magnetic bearing stator.
2, the low power consumption axial magnetic bearing with redundancy structure according to claim 1 is characterized in that: described permanent magnet (4) adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials to make.
3, the low power consumption axial magnetic bearing with redundancy structure according to claim 1 is characterized in that: described permanent magnet (4) is an annulus, magnetizes vertically.
4, the low power consumption axial magnetic bearing with redundancy structure according to claim 1 is characterized in that: described magnetic guiding loop (5), bearing support (9) and suspension (6) adopt the good soft magnetic material of magnetic property to make.
5, a kind of low power consumption axial magnetic bearing with redundancy structure, it is characterized in that: by bearing support (9), two groups of field coils (2,3), permanent magnet (4), magnetic guiding loop (5), air gap (7), auxiliary air gap (10) and suspension (6) are formed, permanent magnet (4) is close on the bearing support (9), magnetic guiding loop (5) is close to permanent magnet (4) and upward and with bearing support (9) is axially forming auxiliary air gap (10), bearing support (9) comprises middle part magnetic pole (92) and interior permanent magnet (93), interior permanent magnet (93), middle part magnetic pole (92), form air gap (7) between magnetic guiding loop (5) and the suspension (6), permanent magnet (4) produces the biasing magnetic flux in air gap (7), two groups of field coils (2 of the interior coiling of bearing support (9), 3), two groups of field coils (2,3) be used for producing control magnetic flux, one group of field coil (2), permanent magnet (4) and magnetic guiding loop (5) and another group field coil (3), permanent magnet (4) and magnetic guiding loop (5) are formed redundant each other axial magnetic bearing stator.
6, the low power consumption axial magnetic bearing with redundancy structure according to claim 5 is characterized in that: described permanent magnet (4) adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials to make.
7, the low power consumption axial magnetic bearing with redundancy structure according to claim 5 is characterized in that: described permanent magnet (4) is an annulus, magnetizes vertically.
8, the low power consumption axial magnetic bearing with redundancy structure according to claim 5 is characterized in that: described magnetic guiding loop (5), bearing support (9) and suspension (6) adopt the good soft magnetic material of magnetic property to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100987511A CN100487259C (en) | 2007-04-26 | 2007-04-26 | Low power consumption axial magnetic bearing with redundant structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100987511A CN100487259C (en) | 2007-04-26 | 2007-04-26 | Low power consumption axial magnetic bearing with redundant structure |
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| CN101054999A CN101054999A (en) | 2007-10-17 |
| CN100487259C true CN100487259C (en) | 2009-05-13 |
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| CNB2007100987511A Expired - Fee Related CN100487259C (en) | 2007-04-26 | 2007-04-26 | Low power consumption axial magnetic bearing with redundant structure |
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| CN102900761B (en) * | 2012-09-06 | 2014-12-24 | 江苏大学 | Permanent magnet biased axial hybrid magnetic bearing |
| CN104632891B (en) * | 2015-03-03 | 2017-05-17 | 武汉理工大学 | Laminated iron core type six-ring redundant axial magnetic bearing |
| CN105443576A (en) * | 2015-12-18 | 2016-03-30 | 贵州大学 | Large bearing axial mixing magnetic bearing |
| CN106438699A (en) * | 2016-11-24 | 2017-02-22 | 武汉理工大学 | Laminated core type single-collar two-coil redundant axial direction magnetic bearing |
| CN106838005B (en) * | 2017-04-11 | 2019-02-05 | 华中科技大学 | A kind of heteropolarity permanent magnetic offset mixed radial magnetic bearing |
| CN107387562A (en) * | 2017-08-29 | 2017-11-24 | 南京磁谷科技有限公司 | A kind of coaxial electromagnet structure of thrust magnetic bearing |
| CN107956798B (en) * | 2017-11-24 | 2019-08-02 | 北京石油化工学院 | A kind of axial pure electromagnetism magnetic bearing of high frequency dynamic quick response spherical surface |
| CN109681527B (en) * | 2019-01-14 | 2020-05-19 | 南京航空航天大学 | Radial magnetic suspension bearing control method with redundancy function |
| CN111594547A (en) * | 2019-02-21 | 2020-08-28 | 北京精雕科技集团有限公司 | Permanent magnet offset type thrust magnetic suspension bearing with low power consumption and large bearing capacity |
| CN111682795B (en) * | 2020-06-12 | 2022-09-27 | 南京航达超控科技有限公司 | Rotary traveling wave ultrasonic motor with backup function and drive control method thereof |
| CN111927885B (en) * | 2020-09-29 | 2021-01-26 | 山东天瑞重工有限公司 | Permanent magnet biased axial magnetic bearing |
| CN113443176B (en) * | 2021-07-02 | 2022-09-27 | 哈尔滨工业大学 | Electromagnetic actuator for nano satellite deployer |
| CN113623319B (en) * | 2021-07-08 | 2023-06-30 | 安徽华驰动能科技有限公司 | Magnetic suspension bearing with safety braking protection function |
| CN114263677B (en) * | 2021-12-27 | 2022-12-02 | 华中科技大学 | Five-bridge-arm fault-tolerant control method and system applied to magnetic suspension bearing |
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2007
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