CN101975223B - Rotor hybrid magnetic bearing outside flat horizontal coil - Google Patents
Rotor hybrid magnetic bearing outside flat horizontal coil Download PDFInfo
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- CN101975223B CN101975223B CN2010105194325A CN201010519432A CN101975223B CN 101975223 B CN101975223 B CN 101975223B CN 2010105194325 A CN2010105194325 A CN 2010105194325A CN 201010519432 A CN201010519432 A CN 201010519432A CN 101975223 B CN101975223 B CN 101975223B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0487—Active magnetic bearings for rotary movement with active support of four degrees of freedom
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/20—Application independent of particular apparatuses related to type of movement
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention relates to a rotor hybrid magnetic bearing outside a flat horizontal coil. A four-axis hybrid magnetic bearing is formed by two two-axis single-side horizontal coil hybrid magnetic bearings which are symmetrically arranged in vertical direction, either two-axis single-side horizontal coil hybrid magnetic bearing comprises a rotor and a stator, the rotor comprises an outer magnet-conducting ring and a rotor core which is coaxially sleeved in an inner cavity of the outer magnet-conducting ring, the stator comprises a stator disk, a magnet-conducting cover plate and a plurality of electromagnetic coils, the stator disk comprises a plurality of uniformly distributed magnetic poles, the magnet-conducting cover plate is arranged at the outer side of the stator disk, the plurality of electromagnetic coils are respectively and horizontally sleeved on the magnet-conducting cover plate and correspond to the positions of the magnetic poles one by one, the rotor is sleeved at the outer side of the stator, and the plurality of magnetic poles are connected at the outer edge to form a whole ring. Since the four-axis magnetic bearing consists of the two single-side coil two-axis magnetic bearings,, the structure of the invention is more compact; and the magnetic poles which are separated from each other in the prior art are connected into a whole ring at the outer edge, and therefore, the eddy current loss and the block moment of the running rotor are reduced.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, especially relate to a kind of tablet four axle hybrid magnetic bearings with horizontal coil and external rotor, it can be used as the contactless support of rotary component, particularly as the highi degree of accuracy of space system, the support mechanism of low noise attitude control flywheel.
Background technique
The loss of magnetic bearing is an important overall target, directly has influence on its application.Magnetic bearing can be divided into passive magnetic bearing, active magnetic bearings and hybrid magnetic bearing according to the magnetic force presentation mode.The stable region of passive magnetic bearing is very little; Active magnetic bearings must be set bias current and comes to provide the operation point to magnetic bearing in electromagnetic coil, therefore control electric current large, and power consumption is large; And hybrid magnetic bearing combines permanent magnet bias with Electromagnetic Control, wherein permanent magnet provides main magnetic flux and the offset operation point magnetic field of magnetic circuit, electromagnetic coil provides the adjusting magnetic flux of magnetic circuit, make rotor be in the equilibrium position by certain control law, can significantly reduce to control electric current, reduce power consumption, thereby be particularly suitable for the demanding space of power consumption with applications such as flywheels.
Yet, it (is that the two is an integral body that the magnetic bobbin core of present permanent magnet offset radial hybrid magnetic bearing adopts integrative-structure with the work magnetic pole, particularly, going up exactly magnetic bobbin core and upper magnetic conduction substrate is an integral body, and lower coil iron core and lower magnetic conduction substrate are an integral body).And, in existing hybrid magnetic bearing structure, magnetic pole is separated from each other at circumferencial direction, because this field structure that is separated from each other, causing its radial magnetic field is (being that magnetic field is heterogeneous) that alternately changes in the circumferential direction of the circle, cause rotor when High Rotation Speed, the magnetic flux by the rotor core circumferential surface is by N frequency multiplication (N the equals number of magnetic poles) cyclically-varying of rotating speed, and the eddy current loss of bringing thus be can not ignore.
Although the lamination of rotor core can reduce eddy current loss to a certain extent, and the lamination thickness that further reduces rotor core can significantly reduce eddy current loss, the problem that will bring like this support strength of magnetic bearing to weaken.
Therefore, for the high speed flywheel rotor, also there is obvious technical disadvantages in present hybrid magnetic bearing: at first, the eddy current of rotor core will produce significantly retardance moment, control with AEROSPACE APPLICATION occasions such as magnetically levitated flywheels in attitude, the power consumption of drive motor be will significantly increase, and stability and the precision of satellite attitude control affected; Secondly, when in the housing that high speed rotor will be enclosed in high vacuum in order to reduce windage loss, excessive eddy current loss also will increase the difficulty of rotor dispersing thermal design; Again, four axle magnetic bearings adopt 2 bilateral coil magnetic bearing combinations, make the height of magnetic bearing larger, thereby cause the increase of volume and the increase of quality.In addition, the magnetic bobbin core of present hybrid magnetic bearing adopts integrative-structure with the work magnetic pole, also has complex structure, can not take full advantage of the shortcomings such as circumferential area of magnetic pole.
Summary of the invention
The technical problem to be solved in the present invention is, for external rotor magnetic bearing structure, overcomes that magnetic bearing complex structure, quality are large, an energy consumption high-technology difficult problem, simplifies the magnetic bearing structure, reduces the magnetic bearing quality, reduces magnetic bearing suspension energy consumption.Therefore, the invention provides the hybrid magnetic bearing that a kind of quality is light, volume is little, energy consumption is low, this is a kind of low consumption permanent magnetism biased external rotor mixed magnetic bearing of tablet that includes horizontal coil, uniform radial pole and external rotor.
To achieve the above object of the invention, technical solution of the present invention is: a kind of rotor hybrid magnetic bearing outside flat horizontal coil, it consists of four axle hybrid magnetic bearings by the monolateral horizontal coil hybrid magnetic bearing of symmetrically arranged diaxon about in the of 2, and the monolateral horizontal coil hybrid magnetic bearing of each diaxon comprises rotor and stator.This rotor comprises: outer magnetic guiding loop; Rotor core, coaxial line are sleeved on the inner chamber of this outer magnetic guiding loop.This stator comprises: stator disc includes a plurality of equally distributed magnetic poles; The magnetic conduction cover plate is arranged on the stator disc outside; And a plurality of electromagnetic coils, the difference horizontal set is on this magnetic conduction cover plate, and each electromagnetic coil is corresponding with the position of 1 magnetic pole respectively; Its rotor is sleeved on the outside of this stator.A plurality of magnetic pole its outer edges place as a whole annulus that links to each other.
According to an embodiment of inner rotor hybrid magnetic bearing of horizontal coil of the present invention, described stator disc is in the form of annular discs, and it comprises: upper magnetic conduction pole plate; Lower magnetic conduction pole plate is positioned at described upper magnetic conduction pole plate below; The mounting disc of magnetic post is arranged between described upper magnetic conduction pole plate and the lower magnetic conduction pole plate, and this magnetic post mounting disc is magnetic conduction not; And a plurality of permanent magnets, evenly being embedded in the mounting disc of described magnetic post, described permanent magnet axially magnetizes in the same way along described stator disc; Wherein said upper magnetic conduction pole plate and lower magnetic conduction pole plate are evenly divided into respectively 4 magnetic poles radially along the circumference, and the magnetic pole of each described lower magnetic conduction pole plate is set to the magnetic pole of corresponding described upper magnetic conduction pole plate symmetrical up and down.
Between the adjacent pole of 4 magnetic poles of described upper magnetic conduction pole plate and between the adjacent pole of 4 magnetic poles of described lower magnetic conduction pole plate respectively its outer edges place be connected by passage, wherein this passage is formed by the magnet case with small cross-sectional area.
The intermediate portion of the stator disc 23 of the invention described above magnetic bearing is that magnetic post mounting disc 232 and one group are by the equally distributed circle of position of magnetic pole or fan-shaped column permanent magnet.The permanent magnet of same set of diaxon magnetic bearing magnetizes vertically in the same way, and the permanent magnet magnetizing direction of magnetic bearing is opposite up and down.Permanent magnet up and down two ends is magnetic conduction pole plates (namely going up magnetic conduction pole plate 231 and lower magnetic conduction pole plate 233) of symmetrical configuration.Every magnetic conduction pole plate is evenly divided into four field structures radially along the circumference.Above-mentioned magnetic conduction cover plate 21 is cross as shown in Figure 3.The placement that is the level of state of corresponding 4 magnetic poles of 4 bumps of cross magnetic conduction cover plate, rectangular electromagnetic wire circle 22, and be sleeved on the bump of correspondence of above-mentioned cross magnetic conduction cover plate.In the pole plate outer rim, the magnet case by small cross-sectional area between the adjacent pole is connected, and 4 magnetic poles connect into the annulus of an integral body at the outer rim place.Therefore, when rotor was in the equilibrium position, the radial permanent magnet bias magnetic field of working gas gap was uniform at whole circumferential surface.Therefore, the radial permanent magnet magnetic flux is reduced to minimum level in the eddy current loss that rotor core produces.The present invention adopts the rotor core of lamination, the eddy current loss of the magnetic bearing rotor core that permanent magnet flux disturbance and coil control flux change is brought when being used for further reducing rotor and departing from the equilibrium position.
The present invention is connected to a whole annulus with the common separated magnetic pole its outer edges of magnetic bearing place, because the permanent magnet of same set of diaxon magnetic bearing is axially magnetizing in the same way, the magnetic flux that permanent magnet produces passes in and out rotor core by radial direction through working gas gap in the magnetic pole outer rim.Therefore, when rotor was in the equilibrium position, the radial permanent magnet magnetic flux of working gas gap was uniformly at whole circumferential surface, thereby eddy current loss and retardance moment during with rotor operation are reduced to minimum level.The magnetic flux that electromagnetic coil produces is pressed radial direction in the turnover rotor core of work gas gap in the magnetic pole outer rim, also has sub-fraction electromagnetism magnetic flux along circumferentially entering adjacent pole through leading pole panel edges attachment portion.Because the joint sectional area is less, even if therefore less magnetic flux also produces very large Magnetic flux density, make the circumferential magnetic circuit of pole edge attachment portion saturated, that is to say, the small cross-sectional area magnet case of passage 8 also can be so that the circumferential magnetic circuit of pole edge attachment portion be saturated under less magnetic flux.Like this, can guarantee that the Electromagnetic Control magnetic circuit coupling effect of each magnetic pole is very little, can not exert an influence to control characteristic.
In addition, in hybrid magnetic bearing of the present invention, with the electromagnetic coil horizontal positioned and take the magnetic conduction cover plate of decussate texture as magnetic bobbin core, play the effect that reduces the magnetic bearing axial height and reduce the magnetic bearing stator quality.And magnetic bobbin core and magnetic pole structurally are separated from each other so that its structure compared to existing technology in the two integrated structure simplified.
Compared with prior art, the invention has the advantages that: adopt 2 monolateral coil diaxon magnetic bearings to be combined into four axle magnetic bearings, reduced coil quantity, reduced height and the structure complexity of magnetic bearing, alleviated the quality of magnetic bearing; Adopt horizontal coil uniform radial pole structure, the magnetic pole its outer edges place of separated magnetic bearing in the prior art is connected to a whole annulus, when rotor is in the equilibrium position, the radial permanent magnet magnetic flux of working gas gap is uniformly at whole circumferential surface, and eddy current loss and retardance moment from the source during with rotor operation have been reduced to minimum level; Magnetic bearing magnetic bobbin core of the present invention structurally separates with magnetic pole, processes and assemble more convenient, and makes magnetic pole can take full advantage of its circumferential area, increases bearing capacity.
Description of drawings
Fig. 1 is the structural representation of a specific embodiment of magnetic bearing of the present invention;
Fig. 2 is the structural representation of the up/down magnetic conduction pole plate of magnetic bearing shown in Figure 1;
Fig. 3 is the partial structurtes schematic perspective view of up/down magnetic conduction pole plate shown in Figure 2;
Fig. 4 is the structural representation of the magnetic conduction cover plate of magnetic bearing shown in Figure 1;
Fig. 5 is magnetic circuit figure of the present invention.
Wherein, description of reference numerals is as follows:
The 1-rotor,
The 11-rotor core,
The outer magnetic guiding loop of 12-,
The 2-stator,
21-magnetic conduction cover plate,
The 22-electromagnetic coil,
The 23-stator disc,
The upper magnetic conduction pole plate of 231-,
The mounting disc of 232-magnetic post,
Magnetic conduction pole plate under the 233-,
The 234-permanent magnet,
The 24-connecting rod,
25-stator installation shaft,
The 26-through hole,
The 3-working gas gap,
The 4-spacer ring,
The 5-spacer ring,
The 6-electromagnetic circuit,
The 7-permanent magnetic circuit,
The 8-passage,
The 9-magnetic pole.
Embodiment
Below in conjunction with drawings and Examples the present invention is specifically described.
Referring to Fig. 1, rotor hybrid magnetic bearing outside flat horizontal coil of the present invention is a kind of tablet low-loss four axle hybrid magnetic bearings that include horizontal coil, uniform radial pole and external rotor, consist of four axle hybrid magnetic bearings by 2 monolateral horizontal coil hybrid magnetic bearings of identical diaxon up and down, metal (upper is symmetrical arranged, and the centre is separated by spacer ring 4 and spacer ring 5.
The monolateral horizontal coil hybrid magnetic bearing of each described diaxon is comprised of rotor 1 and stator 2.Rotor 1 is enclosed within on the stator 2 and consists of external rotor.Rotor 1 is made of rotor core 11 and outer magnetic guiding loop 12, and wherein rotor core 11 coaxial lines are sleeved on the inner chamber of outer magnetic guiding loop 12.The rotor core 11 of rotor 1 adopts good sheet-type soft magnetic material (such as the electrical steel plate) punching press of a kind of magnetic property to fold and form.
Stator 2 is comprised of magnetic conduction cover plate 21,4 electromagnetic coils 22, stator disc 23,4 connecting rods 24 and stator installation shaft 25,4 connecting rods 24 connect into an integral body by 4 through holes 26 with magnetic conduction cover plate 21 and stator disc 23 respectively, and are sleeved on the stator installation shaft 25 along stator and the rotor of central axial direction with 2 monolateral horizontal coil hybrid magnetic bearings of diaxon.
Stator disc 23 is comprised of upper magnetic conduction pole plate 231, magnetic post mounting disc 232, lower magnetic conduction pole plate 233 and permanent magnet 234, wherein go up magnetic conduction pole plate 231, magnetic post mounting disc 232, lower magnetic conduction pole plate 233 and stack gradually, permanent magnet 234 is along circumferentially evenly embedding in magnetic post mounting disc 232.
Has gap (being working gas gap 3) between the inner ring surface of the outer ring surface of the stator disc 23 of said stator 2 and the rotor core 11 of above-mentioned rotor 1.
The outer magnetic guiding loop 12 of the magnetic conduction cover plate 21 of stator 2, upper magnetic conduction pole plate 231, lower magnetic conduction pole plate 233 and rotor 1 all adopts the good soft magnetic material of magnetic property to process.Described permanent magnet 234 rounded or fan-shaped columns, the good rare-earth permanent magnet of employing magnetic is made and is axially magnetized in the same way.Described magnetic post mounting disc 232 adopts non-magnetic alloy material aluminum alloy or titanium alloy to make.Paint-dipping drying formed after described electromagnetic coil 22 adopted the good enameled cable coiling of electric conductivity.
As shown in Figure 2, corresponding to a plurality of permanent magnets 234 that evenly are arranged between upper magnetic conduction pole plate 231 and the lower magnetic conduction pole plate 233, every magnetic conduction pole plate (namely going up magnetic conduction pole plate 231 and lower magnetic conduction pole plate 233) is evenly divided into respectively 4 magnetic poles 9 radially along the circumference, and 4 magnetic poles 9 of upper magnetic conduction pole plate 231 are symmetrical about in the of 9 with 4 magnetic poles of lower magnetic conduction pole plate 233.
Described magnetic post mounting disc 232 mainly contains the effect of two aspects: it is an important structural member for (1), be used for basically being location and fixed permanent magnet 234 between the whole circular up/down magnetic conduction pole plate, also bear simultaneously the up and down pressure between the magnetic conduction pole plate, protection permanent magnet 234 makes it not crushed; (2) because each magnetic pole 9 can corresponding polylith permanent magnet 234, utilize this magnetic post mounting disc 232 to make up configuration to the polylith permanent magnet, take full advantage of the sectional area of permanent magnet, be conducive to produce at the working gas gap place even offset magnetic field.
In magnetic conduction pole plate outer rim, between the adjacent pole of 4 magnetic poles 9 of described upper magnetic conduction pole plate 231 and between the adjacent pole of 4 magnetic poles 9 of lower magnetic conduction pole plate 233 respectively the magnet case (being passage 8) by small cross-sectional area be connected, so that 4 magnetic poles 9 of upper magnetic conduction pole plate 231 are linked to be a whole annulus at the outer rim place, 4 magnetic poles 9 of lower magnetic conduction pole plate 233 equally also connect into a whole annulus at the outer rim place.Thereby when rotor was in the equilibrium position, the radial permanent magnet magnetic flux of working gas gap was uniform at whole circumferential surface.
Described passage 8 should be tried one's best in the radially residing position of up/down magnetic conduction pole plate near the setting position of rotor 1, namely, the passage corresponding with internal rotor should be arranged on the inner edge of magnetic conduction pole plate, the passage corresponding with external rotor should be arranged on the outer rim of magnetic conduction pole plate, and guarantee forms uniform magnetic field in air gap and rotor like this.
As shown in Figure 4, the magnetic conduction cover plate 21 of decussate texture is used as the iron core of the rectangular electromagnetic wire circle 22 of 4 horizontal positioned, its decussate texture is made of 4 bumps, each bump is respectively corresponding to one of described 4 magnetic poles 9, and each electromagnetic coil 22 is the level of state and places and be set on the bump of described magnetic conduction cover plate 21.The magnetic conduction cover plate 21 of this decussate texture plays the effect that reduces the magnetic bearing axial height and reduce the magnetic bearing stator quality.
Magnetic conduction cover plate 21 as the magnetic bobbin core of electromagnetic coil 22 adopts Split type structures with described 4 magnetic poles 9, and namely described magnetic conduction cover plate 21 and the up/down magnetic conduction pole plate that consists of described magnetic pole 9 are separable independent components each other, and links together by connecting rod 24.
As shown in Figure 5, consisted of the permanent magnetic circuit 7 of magnetic bearing by permanent magnet 234, upper magnetic conduction pole plate 231, lower magnetic conduction pole plate 233, rotor 1 and air gap 3; Consisted of the electromagnetic circuit 6 of magnetic bearing by electromagnetic coil 22, magnetic conduction cover plate 21, upper magnetic conduction pole plate 231, air gap 3 and rotor 1.
For the passage 8 that is communicated with between the adjacent pole 9, permanent magnet 234 can form even offset magnetic field in the time of should guaranteeing that rotor is in the equilibrium position to the setting of its concrete structure size in working gas gap 3, guarantees that again the magnetic excitation circuit that electromagnetic coil produces is separate.From the angle of energy loss, the more large permanent magnet 234 that more is conducive to of connection area forms even offset magnetic field, reduces eddy current loss; From the angle of control, connection area is more little, and more to be conducive to magnetic excitation circuit separate, is convenient to the control of magnetic bearing.The many factors such as material of the size of passage connection area and permanent magnet material and sectional area, magnetic conduction pole plate are relevant.The sectional area of suitable passage 8 is about 1%～15% of single magnetic pole area, and more excellent scope is 2%～4%.
The partial structurtes schematic perspective view of up/down magnetic conduction pole plate as shown in Figure 3, it represents an example of up/down magnetic conduction pole plate of the present invention, wherein, the area S1 of the working surface of each magnetic pole 9 (1/4 cylindrical side) (being single magnetic pole area) is 247.5mm
2, the sectional area S2 of passage 8 is 7mm
2, be about each magnetic pole 9 working surface area S1 2.8%.For example, for example shown in Figure 3, when the size of passage 8 was suitable, by finite element numerical result of calculation as can be known, the Magnetic flux density in permanent magnet bias magnetic field minimum was 0.747T in the air gap 3, is 0.754T to the maximum.
What form therewith significantly contrast is, when linking to each other without passage 8 between each adjacent pole 9, by finite element numerical result of calculation as can be known, the Magnetic flux density in the permanent magnet bias magnetic field in the local gaps corresponding with the interval of magnetic pole 9 is less, be about 0.276T, remaining part is about 0.758T.
Can find out, when between adjacent pole 9, having the suitable passage of size 8 to be communicated with, can significantly improve the uniformity of the magnetic flux distribution in permanent magnet bias magnetic field in the air gap 3.
Permanent magnetic circuit 7 also provides the passive stabilization of rotor axial motion except providing the operation point for magnetic bearing.Therefore, tablet mixed magnetic bearing with horizontal-coil uniform radial pole and low-loss outer rotor structure shown in Figure 1 can become a kind of radially four axle ACTIVE CONTROL hybrid magnetic bearings.
According to the embodiments of the invention shown in Fig. 1-Fig. 5 and to these embodiments' associated description, can find out: 2 diaxon hybrid magnetic bearings that consist of four axle hybrid magnetic bearings of the present invention all adopt monolateral loop construction, namely only at one-sided magnetic conduction cover plate 21 and the electromagnetic coil 22 of arranging, and set gradually from top to bottom magnetic conduction cover plate 21, electromagnetic coil 22 and the stator disc 23 of a diaxon hybrid magnetic bearing, and the stator disc 23 of another diaxon hybrid magnetic bearing, electromagnetic coil 22 and magnetic conduction cover plate 21.
Between the lower magnetic conduction pole plate 233 of the stator 2 of 2 described diaxon hybrid magnetic bearings, separated by spacer ring 4, between the rotor 1 of 2 described diaxon hybrid magnetic bearings, separated by spacer ring 5.
The magnetic conduction cover plate 21 of a diaxon hybrid magnetic bearing, stator disc 23 and the stator disc 23 of diaxon hybrid magnetic bearing of being connected were connected with the magnetic conduction cover plate along circumferentially the connecting successively by 4 connecting rods 24 respectively of described magnetic conduction cover plate 21, and these 4 connecting rods 24 are separately positioned on one of 4 bumps of magnetic conduction cover plate 21.The stator 2 of 2 described diaxon hybrid magnetic bearings after the connection is sleeved on the stator installation shaft 25.
Working principle of the present invention is: permanent magnet 234 provides the biasing magnetic flux for the radially working gas gap 3 between external rotor 1 and the inner stator 2, produces the required radial force of magnetic bearing static suspension.When left and right sides air gap equated, the radial force that two relative magnetic poles produce was cancelled out each other, and rotor 1 is in the equilibrium position.When to the left and right radial displacement of rotor 1, the left side air gap reduces, thereby the left side permanent magnet flux increases and suction becomes large, and the right side air gap becomes large simultaneously, and the right side permanent magnet flux reduces and suction diminishes, and it is mobile to the left that the result can make rotor 1 continue.In order to suppress this imbalance, electromagnetic coil 22 produces electromagnetism magnetic flux and the stack of permanent magnet bias magnetic flux, plays the effect that weakens the left side air-gap flux, strengthens the right side air-gap flux, thereby produce control force rotor 1 is retracted the equilibrium position.
When rotor 1 had axial displacement, the magnetic line of force between rotor 1 and the stator 2 twisted and produces axially stable restoring force, made rotor 1 axially obtain driven suspension.
Claims (10)
1. rotor hybrid magnetic bearing outside flat horizontal coil, it is that the monolateral horizontal coil hybrid magnetic bearing of each described diaxon comprises by 2 four axle hybrid magnetic bearings of consisting of of the monolateral horizontal coil hybrid magnetic bearing of symmetrically arranged diaxon up and down:
Rotor (1) comprising:
Outer magnetic guiding loop (12);
Rotor core (11), coaxial line are sleeved on the inner chamber of this outer magnetic guiding loop (12); And
Stator (2) comprising:
Stator disc (23) includes a plurality of equally distributed magnetic poles (9);
Magnetic conduction cover plate (21) is arranged on this stator disc (23) outside; And
A plurality of electromagnetic coils (22), the difference horizontal set is on this magnetic conduction cover plate (21), and each electromagnetic coil (22) is corresponding with the position of 1 magnetic pole (9) respectively; And
Described rotor (1) is sleeved on the outside of this stator (2).
2. rotor hybrid magnetic bearing outside flat horizontal coil according to claim 1, wherein,
Described a plurality of magnetic pole (9) its outer edges place as a whole annulus that links to each other.
3. rotor hybrid magnetic bearing outside flat horizontal coil according to claim 1, wherein, described stator disc (23) is in the form of annular discs, and it comprises:
Upper magnetic conduction pole plate (231);
Lower magnetic conduction pole plate (233) is positioned at described upper magnetic conduction pole plate (231) below;
Magnetic post mounting disc (232) is arranged between described upper magnetic conduction pole plate (231) and the lower magnetic conduction pole plate (233), and this magnetic post mounting disc (232) is magnetic conduction not; And
A plurality of permanent magnets (234) are evenly embedded in described magnetic post mounting disc (232), described permanent magnet (234) axially magnetizing in the same way along described stator disc (23); And
Described upper magnetic conduction pole plate (231) and lower magnetic conduction pole plate (233) are evenly divided into respectively 4 magnetic poles (9) radially along the circumference, and the magnetic pole of each described lower magnetic conduction pole plate (233) is set to the magnetic pole of corresponding described upper magnetic conduction pole plate (231) symmetrical up and down.
4. rotor hybrid magnetic bearing outside flat horizontal coil according to claim 3, wherein,
Distinguish its outer edges place between the adjacent pole of 4 magnetic poles (9) of described upper magnetic conduction pole plate (231) and between the adjacent pole of 4 magnetic poles (9) of described lower magnetic conduction pole plate (233) and be connected by passage (8), wherein this passage (8) is formed by the magnet case with small cross-sectional area.
5. rotor hybrid magnetic bearing outside flat horizontal coil according to claim 3, wherein, between the inner ring surface of the rotor core (11) of the outer ring surface of the stator disc (23) of described stator (2) and described rotor (1), has working gas gap (3).
6. rotor hybrid magnetic bearing outside flat horizontal coil according to claim 5, wherein,
Described upper magnetic conduction pole plate (231), permanent magnet (234), lower magnetic conduction pole plate (233), air gap (3) and rotor (1) consist of permanent magnetic circuit (7); And
Described magnetic conduction cover plate (21), the electromagnetic coil (22), air gap (3), rotor (1) and the upper magnetic conduction pole plate (231) that are sleeved on this magnetic conduction cover plate (21) consist of electromagnetic circuit (6).
7. the described rotor hybrid magnetic bearing outside flat horizontal coil of any one in 6 according to claim 3, wherein,
Described magnetic conduction cover plate (21) has decussate texture, and its decussate texture is made of 4 bumps, and each bump is respectively corresponding to one of described 4 magnetic poles (9); The number of described electromagnetic coil (22) is 4, and each described electromagnetic coil (22) is the level of state and places and be set on the bump of described magnetic conduction cover plate (21).
8. the described rotor hybrid magnetic bearing outside flat horizontal coil of any one in 6 according to claim 1, wherein, described rotor core (11) comprises that upper rotor part is unshakable in one's determination and lower rotor part is unshakable in one's determination, and described upper rotor part iron core and lower rotor part iron core all have lamination.
9. the described rotor hybrid magnetic bearing outside flat horizontal coil of any one in 6 according to claim 1, wherein,
2 diaxon hybrid magnetic bearings that consist of described four axle hybrid magnetic bearings all adopt monolateral loop construction, only at the described magnetic conduction cover plate of one-sided placement (21) and described electromagnetic coil (22), and set gradually from top to bottom magnetic conduction cover plate (21), electromagnetic coil (22) and the stator disc (23) of a diaxon hybrid magnetic bearing, stator disc (23), electromagnetic coil (22) and the magnetic conduction cover plate (21) of another diaxon hybrid magnetic bearing;
Between the stator disc (23) of the stator (2) of 2 described diaxon hybrid magnetic bearings, separated by spacer ring (4), between the rotor (1) of 2 described diaxon hybrid magnetic bearings, separated by spacer ring (5).
10. rotor hybrid magnetic bearing outside flat horizontal coil according to claim 9, wherein,
The magnetic conduction cover plate (21) of a diaxon hybrid magnetic bearing, stator disc (23) and the stator disc (23) of diaxon hybrid magnetic bearing of being connected are connected 21 with the magnetic conduction cover plate) along circumferentially the connecting successively by 4 connecting rods (24) respectively of described magnetic conduction cover plate (21), 2 stators (2) of 2 described diaxon hybrid magnetic bearings after the connection are sleeved on the stator installation shaft (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105194325A CN101975223B (en) | 2010-10-26 | 2010-10-26 | Rotor hybrid magnetic bearing outside flat horizontal coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105194325A CN101975223B (en) | 2010-10-26 | 2010-10-26 | Rotor hybrid magnetic bearing outside flat horizontal coil |
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| Publication Number | Publication Date |
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| CN101975223A CN101975223A (en) | 2011-02-16 |
| CN101975223B true CN101975223B (en) | 2013-01-09 |
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| CN2010105194325A Expired - Fee Related CN101975223B (en) | 2010-10-26 | 2010-10-26 | Rotor hybrid magnetic bearing outside flat horizontal coil |
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| CN103836069A (en) * | 2012-11-26 | 2014-06-04 | 张玉宝 | Magnetic bearing and control mode thereof |
| CN106411070B (en) * | 2016-10-17 | 2019-01-25 | 珠海格力电器股份有限公司 | Magnetic suspension bearing magnetic steel of stator assembles positioning device |
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| JP2004162834A (en) * | 2002-11-14 | 2004-06-10 | Ishikawajima Harima Heavy Ind Co Ltd | Magnetic bearing |
| CN101771308B (en) * | 2009-04-26 | 2015-12-16 | 张玉宝 | A kind of magnetic suspension rotor support system and magnetic suspension bearing and magnetic bias weight reducing device |
| CN101608670B (en) * | 2009-07-24 | 2011-01-12 | 中国人民解放军国防科学技术大学 | Mixed magnetic bearing with vertical-coil uniform radial pole and low-loss outer rotor |
| CN101608669B (en) * | 2009-07-24 | 2011-04-06 | 中国人民解放军国防科学技术大学 | Mixed magnetic bearing with horizontal-coil uniform radial pole and low-loss outer rotor |
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| CN101975223A (en) | 2011-02-16 |
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