CN202520777U - Permanent magnet biased axial magnetic bearing - Google Patents
Permanent magnet biased axial magnetic bearing Download PDFInfo
- Publication number
- CN202520777U CN202520777U CN2012200661759U CN201220066175U CN202520777U CN 202520777 U CN202520777 U CN 202520777U CN 2012200661759 U CN2012200661759 U CN 2012200661759U CN 201220066175 U CN201220066175 U CN 201220066175U CN 202520777 U CN202520777 U CN 202520777U
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- axial
- magnet
- magnetic
- stator
- permanent magnet
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Abstract
The utility model discloses a permanent magnet biased axial magnetic bearing in the technical field of magnetic bearings. The permanent magnet biased axial magnetic bearing comprises a stator assembly and a rotor assembly, wherein the stator assembly comprises an axial rotor, an axial control winding, a magnet-insulation body, a magnetic conductor and a permanent magnet body; the rotor assembly comprises a rotary shaft and a rotor iron core; the axial control winding is wound on a magnetic pole of the axial stator; the rotor iron core is sleeved on the rotary shaft; the magnetic conductor is arranged in the axial stator; an outer end of the magnetic conductor is connected with an inner end of the axial stator; the magnet-insulation body is arranged in the axial stator; an outer end of the magnet-insulation body is connected with an inner side of the axial stator; the permanent magnet body is attached to one side of the magnetic conductor; an outer end of the permanent magnet body is in contact with an inner end face of the magnet-insulation body; and the rotor iron core is arranged in the axial stator. The permanent magnet biased axial magnetic bearing has a simple structure, high critical speed of revolution, and low power consumption; and magnetic flow is flown axially, and is completely decoupled with radial suspending force, so that the control is convenient.
Description
Technical field
The utility model relates to a kind of hybrid magnetic bearing of magnetic bearing technical field, in particular a kind of permanent-magnetic biased axial magnetic bearing.
Background technique
Magnetic suspension bearing abbreviates magnetic bearing again as, is to utilize the magnetic force between stator and the rotor that rotor is suspended in the space, makes a kind of novel high-performance bearing that does not have Mechanical Contact between stator and the rotor.Owing to do not have contact mechanically between the stator and rotor; So the rotor of magnetic suspension bearing can reach very high running rotating speed; And have advantages such as mechanical wear is little, energy consumption is low, the life-span is long, unlubricated, pollution-free, be particularly suitable for special applications such as high speed, vacuum and ultra cleaning.
At present; The mode that magnetic bearing provides according to magnetic force is divided into following several kinds: first kind is active magnetic bearings; There is bias current in this magnetic bearing coil, so that bias magnetic field to be provided, superposes with the biasing magnetic flux by the control electric current control magnetic flux that the control winding produces of flowing through; Thereby produce controlled suspending power, volume, weight and power consumption are all bigger.Second kind is passive magnetic bearing; The suspending power of this magnetic bearing is provided by permanent magnet fully, and its required controller is simple, and the suspension power consumption is little; But rigidity and damping are all less, only generally apply in one direction supporting object or alleviate the load that acts on the traditional bearing.The third is a hybrid magnetic bearing; The electromagnet that this magnetic bearing adopts permanent-magnet material to substitute in the active magnetic bearings produces bias magnetic field, and the just balanced load that electromagnet provides or the controlling magnetic field of interference greatly reduce the power loss that produces because of bias current; The required Number of ampere turns of electromagnet is the half the of active magnetic bearings; Dwindle the volume of magnetic bearing, alleviated its weight, and improved bearing capacity.
The permanent-magnetic biased axial magnetic bearing structural type of research is divided into three kinds in the world at present, and a kind of is that permanent magnet is placed rotor, and installation difficulty is increased, and limits its high speed operation; Second kind of magnetic bearing places the both sides of stator with suspended rotor, and axial length is long, and critical speed of rotation is low; In the third magnetic bearing axially the control magnetic flux pass permanent magnet, permanent magnet is tangible demagnetizing effect, leakage field is bigger, at a high speed, the application is restricted efficiently.
The model utility content
Goal of the invention: the purpose of the utility model is to overcome the deficiency of existing technology, provide a kind of simple in structure, control permanent-magnetic biased axial magnetic bearing easily.
Technological scheme: the utility model realizes that through following technological scheme the utility model comprises stator module and rotor assembly, described stator module comprise axial stator, axially control winding, at a distance from magnet, magnet case, permanent magnet; Described rotor assembly comprises rotating shaft and rotor core; Wherein: axially control on the magnetic pole that winding is around in axial stator, rotor core is set in the rotating shaft, and magnet case is located in the axial stator; Its outer end links to each other with axial stator is inner; Be located in the axial stator at a distance from magnet, its outer end links to each other with axial stator is inboard, and permanent magnet is attached at a side of magnet case; The interior edge face of its outer end and separated magnet contacts, and rotor core places the inside in axial stator.
Described rotor core is a disc, and the central sleeve of disk is connected in the rotating shaft; For ease of the high speed rotating of suspended rotor, described rotor core is that solid soft magnetic material is processed.
In the utility model, permanent magnet is positioned at places the rotor core both sides on the stator, structure is comparatively simple, and control is convenient, and through rotor core being designed to laminar disc, critical speed of rotation is high.
During the utility model work: the permanent-magnetic biased axial magnetic bearing of the utility model; Utilization is positioned at the annular permanent magnet of two identical axial chargings of rotor core both sides and sets up quiescent biasing magnetic field; Form closed magnetic circuit through axial stator, rotor core and magnet case; When rotor core is positioned at the longitudinal balance position; Because the symmetry properties of structure, the magnetic flux that annular permanent magnet produces equate that at the right side of the axial end of rotor core air gap and the left side air gap place this moment, left and right sides suction equated; Suppose that this moment, rotor received level disturbing force to the right; Then axially controlling winding passes to the control electric current and in axial air-gap, produces the control magnetic flux and superpose with the biasing magnetic flux; Magnetic field strengthens in the air gap of a left side; Controlling magnetic field and bias magnetic field are in the opposite direction in the right air gap, field weakening, generation level suspending power left in rotor core; If rotor receives disturbing force left, then control current reversal, the control flux-reversal of formation and the stack of biasing magnetic flux form suspending power to the right.
Beneficial effect: compared with prior art, magnetic flux can be to radially not being suspended with influence, with radial suspension force decoupling zero each other all in axial circulation in the utility model.Rotor core is mainly as the biasing magnetic circuit, and this discoid rotor core not only can shorten dramatically the axial length of magnetic bearing, improves the critical speed of rotation of rotor, simultaneously, also can shorten the magnetic circuit of axial control magnetic flux, reduces the loss of axial magnetic flux.The magnetic pole of axial stator is positioned on the magnet case, can shorten the axial length of whole bearing.Simultaneously; This magnetic bearing utilizes permanent magnet to produce the biasing magnetic flux; It is little also to have power consumption; The advantage that axial length is short has broad application prospects in high-speed applications such as flywheel energy storage, air condition compressor, turbomolecular pumps, and national defence fields such as Aero-Space and naval vessels that it is used in then have more significance.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the magnetic circuit schematic diagram of the utility model.
Embodiment
Embodiment in the face of the utility model elaborates down; Present embodiment is being to implement under the prerequisite with the utility model technological scheme; Provided detailed mode of execution and concrete operating process, but the protection domain of the utility model is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises stator module and rotor assembly, and wherein: stator module is located at the periphery of rotor assembly.Stator module comprise axial stator 1, axially control winding 2, at a distance from magnet 3, magnet case 4 and permanent magnet 5; Rotor assembly comprises rotor core 6 and rotating shaft 7, axially controls on the magnetic pole that winding 2 is around in axial stator 1, and rotor core 6 is set in the rotating shaft 7; Be located in axial stator 1 and the magnet case 4 at a distance from magnet 3; Outer end at a distance from magnet 3 contacts with the interior edge face of axial stator 1, and magnet case 4 also is located in the axial stator, and the outer end of magnet case 4 contacts with the interior edge face of axial stator 1; Permanent magnet 5 be attached at magnet case 4 a side and and contact at a distance from the interior edge face of magnet 3, rotor core 6 is located at axial stator 1, at a distance from the inside of magnet 3, permanent magnet 5; Rotor core 6 is discs, and the central sleeve of disk is connected in the rotating shaft 7, and axial stator 1 is located at the outer end of disk.
The interior edge face of axial stator 1 and separated magnet 3 and magnet case 4 contact; The annular permanent magnet 5 of two identical axial chargings adopts neodymium iron boron to process; Be equipped with at a distance from magnet 3, magnet case 4 and annular permanent magnet 5 in the both sides of rotor core 6, each annular permanent magnet 5 is attached at and the separated magnet 3 of its homonymy and the inside of magnet case 4; Two separated magnet 3 identical annulars that are are to process with non-magnetizer; Two magnet cases 4 are identical, only with the biasing magnetic circuit, process discoid with solid soft magnetic material.For ease of the high speed rotating of suspended rotor, rotor core 6 also adopts solid soft magnetic material to process, and is sleeved in the rotating shaft 7, forms axial air-gap with axial stator 1 and permanent magnet 5, and is full decoupled with radial suspension force.Be arranged in the rotor core 6 main biasing magnetic circuits that are used as of the magnetic pole of axial stator 1; Can be made into the sheet discs shape, this discoid rotor core 6 has not only shortened dramatically the axial length of magnetic bearing; Improved the critical speed of rotation of rotor; Simultaneously, also shorten the magnetic circuit of axial control magnetic flux, reduced the loss of axial magnetic flux.The magnetic pole of axial stator 1 is positioned on magnet 3 and magnet case 4, has shortened the axial length of whole bearing.
Shown in solid line among Fig. 2, annular permanent magnet 5 produces the biasing magnetic flux, through magnetic pole, axial air-gap, rotor core 6, the magnet case 4 formation closed magnetic circuits of axial stator 1; Shown in dotted line among Fig. 2, axially control magnetic pole, axial air-gap, the rotor core 6 formation closed-loop paths of magnetic flux in axial stator 1.
Claims (6)
1. permanent-magnetic biased axial magnetic bearing; Comprise stator module and rotor assembly; Described stator module comprise axial stator (1), axially control winding (2), at a distance from magnet (3), magnet case (4) and permanent magnet (5); Described rotor assembly comprises rotating shaft (7) and rotor core (6); It is characterized in that: axially control winding (2) and be around on the magnetic pole of axial stator (1), rotor core (6) is set in the rotating shaft (7), is located in the axial stator (1) at a distance from magnet (3) and magnet case (4); Permanent magnet (5) is attached in magnet (3) and magnet case (4), and the interior edge face of the outer end of permanent magnet (5) and separated magnet (1) contacts and a side links to each other with magnet case (4); The inside of axial stator (1) and the outer end that axial stator (1) is located at rotor core (6) are located in rotor core (6).
2. permanent-magnetic biased axial magnetic bearing according to claim 1 is characterized in that: described rotor core (6) is a disc, and the central sleeve of disk is loaded in the rotating shaft (7).
3. permanent-magnetic biased axial magnetic bearing according to claim 1 is characterized in that: described rotor core (6) and axial stator (1) are that solid soft magnetic material is processed.
4. permanent-magnetic biased axial magnetic bearing according to claim 1 is characterized in that: described permanent magnet (5) is a permanent magnet of being processed annular by neodymium iron boron.
5. permanent-magnetic biased axial magnetic bearing according to claim 1 is characterized in that: the described separated magnet of processing for non-magnetizer at a distance from magnet (3) of annular.
6. permanent-magnetic biased axial magnetic bearing according to claim 1 is characterized in that: described magnet case (4) is two solid disks, is located at the outside of permanent magnet (5) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200661759U CN202520777U (en) | 2012-02-28 | 2012-02-28 | Permanent magnet biased axial magnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200661759U CN202520777U (en) | 2012-02-28 | 2012-02-28 | Permanent magnet biased axial magnetic bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202520777U true CN202520777U (en) | 2012-11-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200661759U Expired - Fee Related CN202520777U (en) | 2012-02-28 | 2012-02-28 | Permanent magnet biased axial magnetic bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202520777U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562800A (en) * | 2012-02-28 | 2012-07-11 | 南京化工职业技术学院 | Permanent-magnet-biased axial magnetic bearing |
| CN108547868A (en) * | 2018-04-12 | 2018-09-18 | 南京邮电大学 | A kind of mixed type axial magnetic bearing of the radial magnetizing of semi-freedom |
| CN109058296A (en) * | 2018-10-09 | 2018-12-21 | 珠海格力电器股份有限公司 | Stator module and the hybrid magnetic-suspension axial bearing arrangement of suction and repulsion |
-
2012
- 2012-02-28 CN CN2012200661759U patent/CN202520777U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562800A (en) * | 2012-02-28 | 2012-07-11 | 南京化工职业技术学院 | Permanent-magnet-biased axial magnetic bearing |
| CN108547868A (en) * | 2018-04-12 | 2018-09-18 | 南京邮电大学 | A kind of mixed type axial magnetic bearing of the radial magnetizing of semi-freedom |
| CN109058296A (en) * | 2018-10-09 | 2018-12-21 | 珠海格力电器股份有限公司 | Stator module and the hybrid magnetic-suspension axial bearing arrangement of suction and repulsion |
| CN109058296B (en) * | 2018-10-09 | 2024-03-05 | 珠海格力电器股份有限公司 | Stator assembly and repulsive force combined magnetic suspension axial bearing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20130228 |