CN1104730A - Circular magnetic suspension bearing - Google Patents
Circular magnetic suspension bearing Download PDFInfo
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- CN1104730A CN1104730A CN 93119380 CN93119380A CN1104730A CN 1104730 A CN1104730 A CN 1104730A CN 93119380 CN93119380 CN 93119380 CN 93119380 A CN93119380 A CN 93119380A CN 1104730 A CN1104730 A CN 1104730A
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Abstract
The magnetic suspension bearings belonging to non-contact no-friction bearing is composed of suspension ring, permanent magnet, magnetic yoke, regulating coil, offset sensor, limit bearing and electronic controller. The axial passive restraint of the permanent magnet to the suspension ring and the radial active restraint of regulating coil and permanent magnet to it cooperate to reach 3-freedom or 5-freedom retraint. Symmetrical structure can eliminate dead weight influence of suspension part caused by installation, so obtaining no mechanical friction, no abrasion, high restraint precision and high regulation effect.
Description
The present invention relates to contactless frictionless bearing field.
American National aviation and space travel office (NASA) are this technical task of energy storage in the solution astrovehicle with U.S. Ge Dade space research center, subsidize Univ Maryland-Coll Park USA and launch this respect research.James doctor A.Kirk of this university has just proposed his super flywheel energy storage scheme-Flywheel energy storage-Part I as far back as 1977, Basic concepts, Int.J.Mech.Sci.19(1977) 223-231, the core component of this scheme is magnetic suspension bearing-Flywheel energy storage-Part II, Magnetically Suspended Superflywheel, Int.J.Mech.Sci.19(1977) 233-245, carried out the experimental research-Satellite Power Using a Magnetically Suspended Flywheel Stack of model in 1988, Journal of Power Sources, 22(1988) 301-311, relevant magnetic suspension bearing experimental result is commented and can be consulted his paper-Prototype of a Magnetically Susponded Fly-Wheel Energy Storage System in 1989,1989 IEEE 1485-1490.
J.A doctor's Kirh magnetic suspension bearing is the magnetic suspension bearing (being referred to as " pancake " formula in his article) of symmetrical Three Degree Of Freedom constraint four extremely outer loop resistance magnetic cellular type resistance magnet ring joints, and its structural principle is seen Fig. 1.It is mainly by adjust coil connect (1) 8 (on, basically being symmetry down should order with " going up XX " and " following XX " parts by the parts of dress, but when inessential, do not distinguish, component number calculates with a magnetic suspension bearing, below roughly the same), (2) 4 of permanent magnets are adjusted coil and are connected (3) 8 in yoke core, (4) 2 of main yokes, (5) 2 of secondary yokes, outer shroud (6), 2 of position-error probes (being installed on respectively between 2 groups of permanent magnet opposed outside and outer shroud separately), Limit Bearing (7), fixed bolt (17), resistance magnetic cellular type resistance magnet ring joints (12) etc. are formed.
Fig. 2 table goes out the working principle of this magnetic suspension bearing.The name of corresponding part is identical with Fig. 1.The main magnetic line of force of representing the suspension main magnetic circuit that constitutes by permanent magnet (2), main yoke (4), outer shroud (6) with the fine line of band arrow; Being illustrated in the adjustment coil with the dotted line of being with arrow connects under the current excitation by adjusting the secondary magnetic line of force that coil connects the secondary magnetic circuit of adjustment of iron core (3), main yoke (4), outer shroud (6), secondary yoke (5) formation.The permeability magnetic material of major and minor magnetic circuit all is operated in non-magnetic and state.No matter whether are outer ring axis and main yoke dead in line, and main flux all exists, and it plays the magnetic bias effect to outer shroud in the axial passive bound effect of having moved of main yoke and to the work of secondary magnetic circuit.When position-error probe detects outer ring axis and main yoke dead in line, the circuit of being controlled by sensor does not even provide electric current to adjusting coil on the one hand, promptly there is not secondary magnetic flux, though have main flux to exist on the other hand its intensity to outer shroud axisymmetricly, be zero so the warp-wise that outer shroud is subjected to closes magnetic force.When above-mentioned two axial lines takes place parallel or during the quasi-parallel skew, sensor can be defeated by control circuit with measured side-play amount, control circuit is according to the size of side-play amount, each about the electrical equipment of parts or mechanical property and the axle positioning index that should reach give and adjust coil and connect and export the electric current of appropriate intensity and direction to produce secondary magnetic flux, the situation that is offset left as if the magnetic suspension bearing outer shroud with middle and upper part among Fig. 2 is an example, at this moment the secondary magnetic line of force is by among the figure shown in the dotted line, because the variable quantity of secondary magnetic flux surpasses the variable quantity of main flux, be the left slit section master of outer shroud and main yoke, secondary magnetic line of force direction is identical, and then magnetic flow increases; Opposite in the major and minor magnetic line of force direction of right slit section, then magnetic flow reduces, so the result of the external cyclization effect of left and right meeting magnetic flux produces a centripetal force of eliminating the parallel offset amount.Can produce similar independent centripetal force equally in Y direction as seen from Figure 1, then moving of outer shroud just is subjected to initiatively constraint of two dimension on perpendicular to the plane of main yoke axle, adds that its just constitutes the constraint of external circular type Three Degree Of Freedom at main yoke passive bound on axially.The effect of Limit Bearing (7) is to disturb when making outer shroud that excessive skew take place when adding, and Limit Bearing is devoted oneself to work with direct contact the between elimination outer shroud and main yoke.
Although this scheme has been improved Location accuracy, bearing capacity and the working life of magnetic suspension bearing suspension greatly and since its structural characteristic exist the position-error probe that suspension is surveyed strict, difficulty is installed, in application, often run into the Limit Bearing linear velocity excessive, can not the combined type position-error probe be set at the suspension axle head, the magnetic flux of adjusting coil stimulating is in the circumferential excessive shortcoming that causes the axle position to adjust the efficient step-down of shunting of main yoke.
The objective of the invention is to set up a kind of magnetic suspension bearing class-circular magnetic suspension bearing, it is that this specific subclass of pancake formula of James doctor A.Kirk is promptly circumferentially hindered the magnetic mode at constraint degrees of freedom, lopps classification, symmetry properties, number of poles, position-error probe by dress type, main yoke aspect six, improves from working principle and structure.
The circular magnetic suspension bearing that the Three Degree Of Freedom that provides according to invention retrains, by the outer shroud yoke, on, following main yoke, permanent magnet, on, following secondary yoke, on, under adjust coil and connect, on, under adjust coil and connect the yoke core, on, under hinder magnet ring joint, position-error probe, Limit Bearing, structural member, electronic control part is formed, each main magnetic circuit is by permanent magnet, on, following main yoke, outer shroud yoke and with last, magnetic gap between following main yoke constitutes, secondary magnetic circuit is by last, following main, secondary yoke, on, downward modulation directrix circle connects the yoke core, outer shroud yoke and with last, magnetic gap between following main yoke constitutes, a part of inwall of outer shroud is the outer wall of simple cylindricality magnetic gap between itself and main yoke, on, following main yoke coaxial line, on, hinder down magnet ring joint the locating face coplane and by the main yoke axis and by this locating face locate on, under hinder magnet ring joint, each face mutually have in the wedge shape space that is referred to as the utmost point that the locating faces of two resistance yoke links constitute a main magnetic circuit and a pair of on, downward modulation directrix circle connects and the yoke core, it is characterized in that: the number of the described utmost point for more than or equal to 3 odd number the time each in extremely on, downward modulation directrix circle connects forms a homophase group, the number of the described utmost point be during greater than 4 even number per two mutual axisymmetric in extremely on, following adjustment connects forms a homophase group, power supply in the homophase group of each utmost point or utmost point centering is surveyed the position-error probe SC sigmal control of outer shroud yoke in the corresponding utmost point or utmost point centering radial deflection amount, resistance magnet ring joint be have in its magnetic gap side on the main yoke one narrow poor and on cross section, be the main yoke section of W type or V-type perpendicular to it.
According to circular magnetic suspension bearing provided by the invention, it is characterized in that: each key groove that is referred to as polar angle equates, the layout that permanent magnet, upper and lower adjustment coil connect yoke core, W type or V-type resistance magnet ring joint about by the main yoke axle, the angle of cut is half two plane symmetry of polar angle, each utmost point or extremely right position-error probe are positioned on the corresponding utmost point or the extremely right equidistant point.
According to circular magnetic suspension bearing provided by the invention, it is characterized in that: each polar angle equates, the layout that upper and lower adjustment coil connects yoke core, W type or V-type resistance magnet ring joint about by the main yoke axle, the angle of cut is half two plane symmetry of polar angle, all permanent magnets are only arranged about a plane symmetry by the main yoke axle, and each utmost point or extremely right position-error probe are positioned on the corresponding utmost point or the extremely right equidistant point.
The circular magnetic suspension bearing that the Three Degree Of Freedom that provides according to another aspect of the present invention retrains, connect and yoke core, upper and lower resistance magnet ring joint, position-error probe, Limit Bearing, electronic control part by upper and lower adjustment coil, it is characterized in that: also comprise: interior ring yoke, upper and lower major-minor yoke.Permanent magnet.Structural member is formed, each main magnetic circuit is by permanent magnet, on, following main yoke, in ring yoke and with last, magnetic gap between following main yoke constitutes, secondary magnetic circuit is by last, following main, secondary yoke, on, downward modulation directrix circle connects the yoke core, in ring yoke and with last, magnetic gap between following main yoke constitutes, in a part of outer wall of ring yoke be the inwall of magnetic gap between itself and main yoke, on, following main yoke conllinear, on, hinder down magnet ring joint the locating face coplane and by the main yoke axis and by this locating face locate on, under hinder magnet ring joint, each locating face that face two resistance magnet rings joints mutually constitute have on the wedge shape space that is referred to as the utmost point main magnetic circuit and a pair of on, under adjust that coil connects and the yoke core, the number of the described utmost point be during more than or equal to 3 odd number every in extremely on, under adjust coil groups and become a homophase group, the number of the described utmost point be during more than or equal to 4 even number per two mutual axisymmetric utmost point centerings on, under adjust coil and connect and to form a homophase group, the ring yoke was in the position-error probe SC sigmal control of the corresponding utmost point or utmost point centering warp-wise off normal amount in electric current in the homophase group of each described utmost point or utmost point centering was surveyed, each resistance magnet ring joint be have in its magnetic gap side on the main yoke one narrow poor and overweighting the main yoke section that is W type or V-type on its cross section.
Described circular magnetic suspension bearing according to another aspect of the present invention provides is characterized in that: the interior ring yoke coaxial line when position-error probe employing and no off normal is by the combined type position-error probe of dress.
The circular magnetic suspension bearing that provides according to another aspect of the present invention, it is characterized in that: each key groove that is referred to as polar angle equates, the layout that permanent magnet, upper and lower adjustment coil connect yoke core, W type or V resistance magnet ring joint all about by the main yoke axle, the angle of cut is half two plane symmetry of polar angle, the displacement that each utmost point or extremely right position-error probe record is positioned on the corresponding utmost point or the extremely right equidistant point.
The circular magnetic suspension bearing that provides according to another aspect of the present invention, it is characterized in that: each polar angle equates, the layout that upper and lower adjustment coil connects yoke core, W type or V-type resistance magnet ring joint about by main magnetic axis, the angle of cut is half two plane symmetry of polar angle, permanent magnet only arranges about a plane symmetry by the main yoke axle, and the displacement that each utmost point or extremely right position-error probe record is positioned on the corresponding utmost point or the extremely right equidistant point.
A kind of circular magnetic suspension bearing of five degree of freedom constraint is provided according to another aspect of the present invention, by last, under adjust that coil connects and the yoke core, on, under hinder magnet ring joint, electronic control part, it is characterized in that: also comprise: annular yoke, on, following main, secondary yoke, permanent magnet, on, under shunt yoke, on, following position-error probe, on, the lower limit bearing, structural member is formed, each main magnetic circuit is by permanent magnet, on, following main yoke, annular yoke and with last, magnetic gap between following main yoke constitutes, go up secondary magnetic circuit by annular yoke and and last main yoke between magnetic gap, last shunting yoke, last coil connects the yoke core, going up secondary yoke constitutes, down secondary magnetic circuit by annular yoke and and following main yoke between magnetic gap, under shunt yoke, lower coil connects the yoke core, down secondary yoke constitutes, on, following main yoke coaxial line, on, hinder down magnet ring joint the locating face coplane and by the main yoke axis and by this locating face locate on, under hinder magnet ring joint, each locating face that face two resistance magnet rings joints mutually constitute have in the wedge shape space that is referred to as the utmost point main magnetic circuit and a pair of on, under adjust that coil connects and the yoke core, the number of the described utmost point be during more than or equal to 3 odd number every in extremely on, under adjust coil and connect and to form the homophase group separately, the number of the described utmost point be during more than or equal to 4 even number per two mutual axisymmetric utmost point centerings on, under adjust coil and connect and to form the homophase group separately, the position-error probe SC sigmal control of each utmost point or the detection annular yoke that extremely electric current in the homophase group in the space is subjected to its homonymy of position warp-wise off normal amount, each resistance magnet ring joint at the corresponding utmost point or in extremely to the space be have in its magnetic gap side on the main yoke one narrow poor and on cross section, be the main yoke section of W type or V-type perpendicular to it.
Described circular magnetic suspension bearing according to another aspect of the present invention provides is characterized in that: a part of inwall that is referred to as the annular yoke of outer shroud yoke is the outer wall of simple cylindricality magnetic gap between itself and main yoke.
Described circular magnetic suspension bearing according to another aspect of the present invention provides is characterized in that: a part of outer wall of the annular yoke of ring yoke is the inwall of simple cylindricality magnetic gap between itself and main yoke in being referred to as.
Described circular magnetic suspension bearing according to another aspect of the present invention provides is characterized in that: upper and lower position-error probe can be all or one of them annular yoke coaxial line when adopting with no off normal by the combined type position-error probe of adorning.
The described circular magnetic suspension bearing that provides according to another aspect of the present invention, it is characterized in that: each key groove that is referred to as polar angle all equates, the layout that permanent magnet, upper and lower adjustment coil connect yoke core, W type or V-type resistance magnet ring joint about by the main yoke axle, the angle of cut is half two plane symmetry of polar angle, the displacement that each utmost point or extremely right position-error probe record is positioned on the corresponding utmost point or the extremely right equidistant point.
The described circular magnetic suspension bearing that provides according to another aspect of the present invention, it is characterized in that: each polar angle equates, the layout that upper and lower adjustment coil connects yoke core, W type or V-type resistance magnet ring joint about by main yoke, the angle of cut is half two plane symmetry of polar angle, permanent magnet only arranges about a plane symmetry by the main yoke axle and asymmetric about the bisector plane of upper and lower main yoke two faces relative to each other, and the displacement that each utmost point or extremely right position-error probe record is positioned on the corresponding utmost point or the extremely right equidistant point.
The described circular magnetic suspension bearing that provides according to another aspect of the present invention, it is characterized in that: each polar angle equates, the layout that upper and lower adjustment coil connects yoke core, W type or V-type resistance magnet ring joint about by main yoke, the angle of cut is half two plane symmetry of polar angle, the permanent magnet and the layout of parts that is referred to as the couple yoke be only about a plane symmetry by the main yoke axle, and the displacement that each utmost point or extremely right position-error probe record is positioned on the corresponding utmost point or the extremely right equidistant point.
Implement circular magnetic suspension bearing of the present invention, except that the symmetric type Three Degree Of Freedom retrains three utmost point outer shroud magnetic suspension bearings, all has position-error probe by dress is convenient, the Limit Bearing linear velocity is little, off normal is adjusted the efficient height, can be adopted characteristics such as combined type position-error probe, compact structure; In addition, three-pole has that structure is simple relatively, the higher characteristics of suspension ring body radial accuracy.But five degree of freedom constraint magnetic suspension bearing not only has off normal adjusts efficient height, the asymmetric also radial component of balance suspension gravity and the couple that it produced, and is to realize suspending with this class lopps bearing first turning round the scheme of rigid body.
As follows to description of drawings:
Fig. 1 is James doctor's A.Kirk a book thin pancake formula magnetic suspension bearing perspective view.
Fig. 2 is James doctor's A.Kirk a book thin pancake formula magnetic suspension bearing principle explanatory drawing.
Fig. 3 to Fig. 5 is a ring magnetic suspension bearing working principle explanatory drawing in the Three Degree Of Freedom constraint.
Fig. 6 to Figure 10 is a ring magnetic suspension bearing working principle explanatory drawing in the five degree of freedom constraint.
Figure 11 is a five degree of freedom constraint outer shroud magnetic suspension bearing working principle explanatory drawing.
Figure 12 is combined type position-error probe embodiment.
Figure 13 is that the symmetric type Three Degree Of Freedom retrains three utmost point outer shroud magnetic suspension bearing embodiments.
Figure 14, Figure 15, Figure 16 are respectively that the symmetric type Three Degree Of Freedom retrains ring magnetic suspension bearing embodiment in three utmost points, four utmost points, the sextupole.
Figure 17, Figure 18 are respectively that the symmetric type five degree of freedom retrains three utmost points, four utmost point outer shroud magnetic suspension bearing embodiments.
Figure 19, Figure 20, Figure 21 are respectively that the symmetric type five degree of freedom retrains ring magnetic suspension bearing embodiment in three utmost points, four utmost points, the sextupole.
Figure 22 is that the asymmetric five degree of freedom retrains three utmost point outer shroud magnetic suspension bearing embodiments.
Figure 23 is ring magnetic suspension bearing embodiment in the asymmetric five degree of freedom constraint four extremely.
In conjunction with the accompanying drawings, further specify circular magnetic suspension bearing definition of the present invention and implementation principle, inventive principle and invention implementation example.
One, circular magnetic suspension bearing definition and implementation principle
1. definition
By permanent magnet, yoke parts (comprising also when suspension ring body, major and minor yoke, five degree of freedom constraint that shunting yoke, asymmetric also comprise the couple yoke when the big couple situation), adjust coil, resistance magnet ring joint, position-error probe, Limit Bearing, fastener, these critical pieces of electronic control part and form, realize that suspension ring body warp-wise initiatively retrains, the magnetic suspension bearing of axial passive bound.
2. circular magnetic suspension bearing implementation principle:
(1) term:
The common name of suspended ring or annular yoke-Nei ring or outer shroud;
All buoyant element of suspension ring body-be connected with suspended ring are so divide another name inner ring body and outer ring body for interior ring and outer shroud situation;
The power of non-magnetic force-except that the major and minor magnetic force of a magnetic suspension bearing of considering all is called non-magnetic force;
Warp-wise component-Li is at the component of radial direction;
The uniform permanent magnet of permanent magnet-magnetic property;
(radially to be normal direction) plane of radial plane-by the magnetic suspension bearing axle; Axle is divided into two radially half planes with the radial plane;
Axially bisector plane-with two main yokes equidistant axially being the plane of normal direction;
The utmost point-upper and lower main yoke coaxial line, the upper and lower resistance magnet ring joint locating face coplane of upper and lower correspondence also passes through the main yoke axis, and the wedge shape space that the locating faces that saved by adjacent two resistance magnet rings constitute is called the utmost point;
The number of number of poles-a divided described wedge shape space of lopps magnetic magnetic suspension bearing;
Extremely right-per two be called about the axisymmetric utmost point of main yoke axle extremely right;
This utmost point is adjusted the adjustment coil that is comprised in the sector space of the coil company-utmost point and even is called this utmost point adjustment coil even;
The adjustment coil of the identical position-error probe SC sigmal control of homophase group-be subordinated to connects;
The angle on two planes of polar angle-formation wedge shape space, its value are that 360 °/n(n is a number of poles);
The polar angle at half-shadow angle-1/2nd;
Combined type position-error probe-, press the coaxial suspension axis when no off normal of this combined sensor when adorning with the sensor that the public component parts of position-error probe that divides combines.
(2) implementation principle:
A. adjusting coil connects yoke core, resistance magnet ring joint and arranges all two radial plane symmetries about the half-shadow angle of the plane angle of cut; Permanent magnet side bus is that straight line, its direction of magnetization are for axially also direction is identical; Belong to the permanent magnet of this utmost point and when big couple situation by the couple yoke of dress all about the equidistant point symmetry of this polar angle;
B. symmetric type does not have the couple yoke, and its whole permanent magnets are arranged and should be connected the yoke core and hinder all symmetry plane symmetries of symmetry of magnet ring joint about adjusting coil; Symmetric type can not the constant warp-wise non-magnetic force of negative function on the suspension ring body.Its of asymmetric permanent magnet arranges that only about a radial plane symmetry in the radial plane at this moment following three kinds of situations are arranged: (1) if simultaneously again about axial bisector plane symmetry can be used for offsetting use on the suspension ring body not with the non-magnetic force of the constant radial of power; (2) if asymmetric then can be used for offsetting the non-magnetic force of the constant radial that has little couple about axial bisector plane; (3) if arrange the radial plane symmetry of unique symmetry in the radial plane of arranging about whole permanent magnets, then can be used for offsetting the non-magnetic force of the constant radial with big couple by dress couple yoke and its.Only there is the asymmetric case of above-mentioned (1) in Three Degree Of Freedom constraint circular magnetic suspension bearing;
C. suspended ring is called external circular type in the main yoke outside; Otherwise be called interior ring type;
D. all yoke all is operated in the magnetic saturation district and does not have shunting yoke, couple yoke, realizes that radially the active of two degrees of freedom retrains suspended ring, axially the passive bound of one degree of freedom then is called the Three Degree Of Freedom constraint; Only part ring body tube section is operated in best magnetic saturation district, all the other yokes and all is operated in non-magnetic saturation district and the shunting yoke is arranged, with realize the axial one degree of freedom passive bound of suspended ring, radially the active constraint that is respectively two degrees of freedom of its two ends then is called the five degree of freedom constraint;
E. main yoke circumferentially adopts resistance magnet ring joint scheme, and adopts W type or V-type resistance magnet ring joint;
F. retrain for Three Degree Of Freedom: the adjustment coil upper and lower at the corresponding levels of every utmost point is linked as a homophase group when number of poles is odd number, each extremely right coil of adjusting upper and lower at the corresponding levels is linked as a homophase group when number of poles is even number, and the electric current in the homophase group is by detecting the place utmost point or extremely the signal footpath control circuit of the sensor of suspended ring radial deflection amount on the equidistant point being controlled.Retrain for five degree of freedom: upper and lower utmost point adjustment coil of every utmost point connects and form the homophase group respectively when number of poles is odd number: each upper and lower extremely right utmost point adjustment coil connects and forms the homophase group respectively when number of poles is even number; In the homophase group electric current by detecting the place utmost point or extremely the signal of the sensor of installing with this homophase group homonymy of suspended ring radial deflection amount on the equidistant point being controlled through control circuit.The control circuit parameter is determined according to control theory.
G. other does not form the structure member of magnetic circuit, all constitutes with diamagnetic material as axle sleeve, bearing, positioning bolt etc.; Cartridge housing is selected permeability magnetic material for use then it should be kept suitable distance with permanent magnet, main yoke, secondary yoke when considering magnetic shielding.
Two, the inventive principle explanation
1. encircle the magnetic suspension bearing principle in the constraint of symmetric type and asymmetric Three Degree Of Freedom
Accompanying drawing 3 is ring magnetic suspension bearing fundamental diagram in the constraint of symmetric type Three Degree Of Freedom.The main magnetic line of force of representing the suspension main magnetic circuit that constitutes by permanent magnet (2), main yoke (4), interior ring (6) with the fine line of band arrow; Dotted line with the band front is illustrated in the secondary magnetic line of force of adjusting the secondary magnetic circuit of adjustment that is made of the whole coil yoke core (3) of meter, main yoke (4), interior ring (6), secondary yoke (5) under coil (1) current excitation.The permeability magnetic material of major and minor magnetic circuit all should be operated in non-magnetic saturation state.No matter whether are inner ring axis and main yoke dead in line, and main flux all exists, and its internally ring play the passive bound effect in the axial dipole field of main yoke and simultaneously the work of secondary magnetic circuit played the magnetic biasing effect.
When position-error probe detected inner ring axis and main yoke dead in line, the circuit that position-error probe is controlled did not even provide electric current to adjusting coil, does not promptly have secondary magnetic flux.Though at this moment when symmetric type designs, have main flux to exist its intensity distriubtion internally ring axisymmetricly, so in the magnetic force that radially closes that is subjected to of ring ring be zero; When asymmetric designs, as shown in Figure 4, the left and right side slit magnetic field distribution of interior ring is axisymmetric no longer, its envelope is seen Fig. 5, at this moment the magnetic force that closes that acts on the inner ring body just balances each other with the radial component that closes that acts on the non-magnetic force (generally being gravity) above it, so total resultant radial force that inner ring body is subjected to still is zero.
When above-mentioned two axial lines takes place parallel or during the quasi-parallel skew, sensor can be defeated by control circuit with measured side-play amount, control circuit is according to the size and the variance ratio thereof of side-play amount, each about the electrical machinery characteristic of parts and the suspension annulate shaft positioning index that should reach give the electric current of adjusting coil output one appropriate intensity and direction to produce secondary magnetic track, if with the off normal of symmetric type-asymmetric situation adjust principle identical therewith-magnetic suspension bearing Fig. 3 in the hoop left avertence move and be example, at this moment secondary flux loop is by among the figure shown in the dotted line, the variable quantity of secondary magnetic flux surpasses the variable quantity of main flux, the left slit section master of ring and main yoke promptly, secondary magnetic line of force direction is opposite, and then magnetic flow reduces; Identical in right slit section two class magnetic line of force directions, then fluxoid increases.So the result of the internal cyclization effect of left and right magnetic flow produces a radial force of eliminating the parallel offset amount.If radially another not the direction of conllinear have the independent radial force of similar this elimination parallel offset, then just be subjected to the active constraint of two degrees of freedom in off normal perpendicular to the plane upper inner ring of main yoke axle, add its main yoke axially on the passive bound of off normal just constitute in the Three Degree Of Freedom of ring retrain.
2. encircle the magnetic suspension bearing principle in the constraint of symmetric type and asymmetric five degree of freedom
The explanation of ring magnetic suspension bearing principle sees that accompanying drawing 6 is to Figure 10 in the five degree of freedom constraint.Comparing structurally (referring to Fig. 6) with ring type bearing in the Three Degree Of Freedom constraint has increased upper and lower shunting yoke (8) and the position-error probe that encircles the end radial deflection in examining has been set respectively at interior ring two ends; The asymmetric structure has also increased by two couple yokes (9) (referring to Fig. 9) when counteracting has the non-magnetic force of constant radial of big couple.(regional work of 6 ") (referring to Fig. 6) portion is in this optimum Working of magnetic saturation district, yet also can be loosened to the working state near the magnetic saturation district to select upper inner ring tube section at magnetic parameter.Adjusting in the control that coil connects electric current makes it be subjected to homonymy position-error probe SC sigmal control.
When the symmetric design shown in the figure b, the stressing conditions when inner ring body does not have off normal is the same with above-mentioned corresponding Three Degree Of Freedom situation.
The difference of when asymmetric designs, pressing application target in two kinds of situation, that is: one, negative function in the suspension ring body not with the non-magnetic force of the constant radial of couple; Two, the constant radial that the have couple non-magnetic force of negative function on the suspension ring body.The same with corresponding Three Degree Of Freedom for first kind of method that situation adopted, promptly the permanent magnet distribution left and right sides is asymmetric and about axial symmetry plane symmetry.Can be divided into little couple and big couple situation for second kind of situation as can be known again by implementation principle b.For little couple situation as shown in Figure 7, at this moment the asymmetric while of the permanent magnet distribution left and right sides is also asymmetric about axial bisector plane, in during the no off normal of ring among Fig. 7 the field intensity envelope in the upper and lower magnetic gap in right side use curve 41 and curve 42 qualitative representations among Fig. 8 respectively, it is owing to magnetically saturated result that flat-top appears in the curve top.According to the magnetic flux principle of continuity, curve-1 should equate that with the area of curve-2 envelope therefore the couple that produces with this method can be very not big.For big couple situation as shown in Figure 9, Figure 10 illustrates the field intensity envelope when suspended ring does not have off normal in Fig. 9 middle and upper part, middle part, the left and right sides, the bottom magnetic gap, use respectively curve 51 and curve 54, curve 52 and curve 55, curve 53 with by line 56 qualitative representations.Because have couple yoke (9) to exist, curve 51 no longer equates with the envelope area of curve 56 with curve 53, curve 54, so can balance each other with the non-magnetic force of the constant radial of big couple.
No matter be that symmetric type also is non-title formula, as long as suspended ring radially do not have off normal, then act on resultant couple on the ring body, close radial force and be zero.And when off normal takes place radially in suspended ring its off normal to eliminate principle also just the same.Environment-development was given birth under a kind of off normal situation in Fig. 6 illustrated, and the main magnetic line of force (25), went up the secondary magnetic line of force (27) trend of the secondary magnetic line of force (28) down.Situation about initiatively retraining with the intrafascicular approximately realization two degrees of freedom of Three Degree Of Freedom is similar, the existence of the upper and lower secondary magnetic line of force can be distinguished and internally encircles two ends and realize that this two degrees of freedom initiatively retrains, and adds that the passive bound of axially going up one degree of freedom just constitutes the five degree of freedom constraint of internal ring.
3. symmetric type and asymmetric five degree of freedom retrain outer shroud magnetic suspension bearing principle.
Accompanying drawing 11 is symmetric type five degree of freedom constraint outer shroud magnetic suspension bearing schematic diagram.It mainly by adjust coil connect (1), permanent magnet (2), adjust coil connect yoke core (3), main yoke (4), secondary yoke (5), outer shroud (6), on shunt yoke (8), down for shunting yoke (8 ＇), go up position-error probe and encircle (15) parts with following off normal sense (13), upper limit bearing with lower limit bearing (7), limited ring and off normal survey and form.Main magnetic circuit (25) is more all arranged and go up secondary magnetic circuit (27), following secondary magnetic circuit (28) with ring type in the above-mentioned five degree of freedom constraint.When asymmetric designs, the method that difference adopted of the radially constant non-magnetic force that is subjected to by outer ring body is identical with ring type correlation method in the above-mentioned five degree of freedom constraint, and the work magnetic parameter of outer shroud tube section (seeing 6 ＇ among Figure 11) is selected also to select the same with five from degree constraint endocyclic tube section work magnetic parameter.So when outer ring body does not have off normal, act on radial force on the outer ring body resultant couple, close radial force and also be zero.When off normal is given birth to radially in environment-development outside, realize an axial passive bound method of active constraint, the outer shroud of outer shroud two ends two degrees of freedom separately also with corresponding in the same during ring.
4. combined type position-error probe
Accompanying drawing 2 provides a kind of combined type position-error probe structure principle chart.It is to belong to the vortex patern displacement transducer, is made up of FERRITE CORE (31), coil (32), radome (33) and resin extender (omitting among the figure).Assembly relation with the coaxial line of suspended ring axon (34) when the no off normal also is shown among the figure.
Parent-FERRITE CORE that Figure 12 provides-design also can not show too many advantage, but can and send more superior combined type position-error probe with this thought.
5. the resistance magnet ring saves
W type resistance magnet ring joint is seen (10) and (10) among Figure 17 among Figure 14, it is characterized in that main yoke magnetic gap side has a narrow magnetic line of force that is pickled with grains or in wine, makes the circumferential shunting of main yoke in main magnet ring joint and is distributed on the section perpendicular to the main yoke axle and is W shape, V-type resistance magnet ring joint is then V-shaped on corresponding section, sees (11) among Figure 15.
Three, the invention implementation example
In implementation example, provide among (one), (two), (three), (four) and provide asymmetric circular magnetic suspension bearing example among symmetric type circular magnetic suspension bearing example, (five), (six), (seven), (eight).
(1), the symmetric type Three Degree Of Freedom retrains three utmost point outer shroud magnetic suspension bearings
The symmetric type Three Degree Of Freedom retrains three utmost point outer shroud magnetic bearing structures and principle as shown in figure 13, and it connects (1) 6, (2) 3 of permanent magnets, adjusts (3) 6 in coil yoke core, (5) 2 of secondary yokes, (4) 2 of main yokes, outer shroud (6), (13) 3 of position-error probes, (14) 3 on position-error probe support, (10) 6 on W type resistance magnetic joint ring, (7) 1 of Limit Bearings, (16) 3 of positioning bolts and other structural member and form by adjusting coil.Two these utmost points of every utmost point are adjusted coil and are even formed a homophase group, so have three homophase groups.The electric current that flows into each homophase group is respectively by controlling through control circuit apart from its nearest position-error probe.
(2), ring magnetic suspension bearing in symmetric type Three Degree Of Freedom constraint three, four, the sextupole
Ring in the symmetric type Three Degree Of Freedom constraint three extremely, the structure of magnetic suspension bearing and principle as shown in figure 14, coil connects (1) 6, permanent magnet (2), adjusts (3) 16 in coil yoke core by adjusting for it, (5) 2 of secondary yokes, (4) 2 of main yokes, interior ring (6), interior ring stand and off normal are surveyed and encircled (15), (13) 3 of position-error probes, position-error probe and Limit Bearing bearing (14), warp, axial limiting bearing (7), (10) 6 of W type magnetic resistance links, axle sleeve (18), (16) 3 of positioning bolts, cartridge housing (19) and formed.Two these utmost points of every utmost point are adjusted coil and are even formed a homophase group, so have three homophase groups, the electric current that flows into each homophase group is respectively by controlling through control circuit apart from being total to nearest position-error probe.
The structure of ring magnetic suspension bearing and principle are as shown in figure 15 in the symmetric type Three Degree Of Freedom constraint four extremely.The component names name can be with reference to Figure 14.Every four extremely right these utmost points are adjusted coil and are even formed a homophase group, so have two homophase groups.The electric current that flows into each homophase group is controlled through control circuit two position-error probes on the symmetry plane by being installed in extremely.
Ring in the symmetric type Three Degree Of Freedom constraint sextupole, the structure of magnetic suspension bearing and principle are as shown in figure 16.The component names name can be with reference to Figure 14.Every four extremely right these utmost points are adjusted coil and are formed together group mutually, so have three homophase groups.The electric current that flows into each homophase group is controlled through control circuit two position-error probes on the symmetry plane by being installed in extremely.
(3), symmetric type five degree of freedom constraint three, four utmost point outer shroud magnetic suspension bearings:
The symmetric type five degree of freedom retrains the structure of three utmost point outer shroud magnetic suspension bearings and principle as shown in figure 17.It is to connect (2) 3 of (1) 6 permanent magnets by adjusting coil, adjust (3) 6 in coil yoke core, (4) 2 of main yokes, (5) 2 of secondary yokes, outer shroud (6), (8) 2 of shunting yokes (ring side section), shunting yoke (end section) (8 ＇) 2, (13) 6 of position-error probes, (14) 2 of position-error probe bearings, (15) 2 of limited ring and off normal side rings, warp, (7) 2 on axial limiting bearing, axle (17), fixture wire hole (21), (10) 6 of W type magnetic resistance links, (16) 3 of positioning bolts form.This utmost point of every utmost point homonymy is adjusted coil and is formed together group mutually, so have six homophase groups.The electric current that flows into each homophase group is respectively by organizing homonymy mutually with this and controlling through control circuit apart from nearest altogether position-error probe.
The symmetric type five degree of freedom retrains the structure of four utmost point outer shroud magnetic suspension bearings and principle as shown in figure 18.The component names name can be with reference to Figure 17.Whenever, extremely two these utmost points of homonymy are adjusted coils and connect and form a homophase group, so have four homophase groups, the electric current that flows into each homophase group is organized on the symmetry plane and two position-error probes of its homonymy are controlled through control circuit by being installed in this mutually.
(4), ring magnetic suspension in symmetric type five degree of freedom constraint three, four, the sextupole
The structure of ring magnetic suspension bearing and principle are as shown in figure 19 in the symmetric type five degree of freedom constraint three extremely.It is to connect (1) 6 by adjusting coil, permanent magnet (2), adjust (3) 18 in coil yoke core, (5) 2 of secondary yokes, (4) 2 of main yokes, interior ring (6), last shunting yoke (8) is surveyed ring (15) with last ring end off normal, under shunt yoke and survey ring with following ring end off normal, (13) 6 of position-error probes, (14) 2 of position-error probe bearing and Limit Bearing bearings, warp, (7) 2 on axial limiting bearing, (10) 6 at W type balk ring joint, axle sleeve (18), (16) 3 of fixed bolts, cartridge housing (19) is formed.This utmost point of every utmost point both sides is adjusted coil and is even formed a homophase group respectively, so have 6 homophase groups.The electric current that flows into each homophase group is respectively by organizing homonymy mutually with this and controlling through control circuit apart from its nearest position-error probe.
The structure of ring magnetic suspension bearing and principle are as shown in figure 20 in the symmetric type five degree of freedom constraint four extremely.The component names name can be with reference to Figure 19.Whenever, extremely two these utmost points of homonymy are adjusted coils and connect and form a homophase group, so have four homophase groups.The electric current that flows into each homophase group is organized on the symmetry plane and two position-error probes of its homonymy of position are controlled through control circuit by being installed in this mutually.
The structure of link magnetic suspension bearing and principle are as shown in figure 21 in the symmetric type five degree of freedom constraint sextupole.The component names name can be with reference to Figure 19.Whenever, extremely two these utmost points of homonymy are adjusted coils and connect and form a homophase group.So have six homophase groups.The electric current that flows into each homophase group is organized on the symmetry plane and two position-error probes of its homonymy of position are controlled through control circuit by being installed in this mutually.
(5), the asymmetric Three Degree Of Freedom retrains three utmost point outer shroud magnetic suspension bearings
Any one radius that the symmetric type Three Degree Of Freedom is retrained in three isometrical permanent magnets among embodiment Figure 13 of three utmost point outer shroud magnetic suspension bearings changes the embodiment that promptly gets corresponding asymmetric magnetic suspension bearing.
(6), ring magnetic suspension bearing in the asymmetric Three Degree Of Freedom constraint three extremely:
In symmetric type Three Degree Of Freedom constraint three extremely, choose a utmost point wantonly among embodiment Figure 14 of ring magnetic suspension bearing, change this symmetrically about the equidistant point of this utmost point and promptly get corresponding asymmetric magnetic suspension bearing embodiment perpendicular to the permanent magnet section of main yoke axle in extremely.
(7), the asymmetric five degree of freedom retrains three utmost point outer shroud magnetic suspension bearings
Retrain at corresponding symmetric type five degree of freedom on embodiment Figure 17 basis of three utmost point outer shroud magnetic suspension bearings and add a couple yoke (9) promptly, its embodiment is seen Figure 22.
(8), ring magnetic suspension bearing in the asymmetric five degree of freedom constraint four extremely
The structural principle of ring magnetic suspension bearing as shown in figure 23 in the asymmetric five degree of freedom constraint four extremely.It is compared with ring in the symmetric type shown in Figure 20 has only increased by 4 of upper and lower couple yoke (9) and fixing bolts (16 ＇) thereof on the component categories.The big I of regulating the middle magnetic gap of couple yoke and interior ring formation changes the size of couple to a certain extent; Increase top utmost point permanent magnet magnetic flux (increasing its sectional area), reduce bottom permanent magnet magnetic flux (reducing its sectional area), can balance each other with the bigger gravity that the interior parts that encircle and be connected with it that suspend are formed suspension.
Claims (14)
1, a kind of circular magnetic suspension bearing of Three Degree Of Freedom constraint, by the outer shroud yoke, on, following main yoke, permanent magnet, on, following secondary yoke, on, under adjust coil and connect, on, under adjust coil and connect the yoke core, on, under hinder magnet ring joint, position-error probe, Limit Bearing, structural member, electronic control part is formed, each main magnetic circuit is by permanent magnet, on, following main yoke, outer shroud yoke and with last, magnetic gap between following main yoke constitutes, secondary magnetic circuit is by last, following main, secondary yoke, on, downward modulation directrix circle connects the yoke core, outer shroud yoke and with last, magnetic gap between following main yoke constitutes, a part of inwall of outer shroud is the outer wall of simple cylindricality magnetic gap between itself and main yoke, on, following main yoke coaxial line, on, hinder down magnet ring joint the locating face coplane and by the main yoke axis and by this locating face locate on, under hinder magnet ring joint, have in the wedge shape space that is referred to as the utmost point that locating faces of each adjacent two resistance yoke link constitute a main magnetic circuit and a pair of on, downward modulation directrix circle connects and the yoke core, it is characterized in that: the number of the described utmost point for more than or equal to 3 odd number the time each in extremely on, downward modulation directrix circle connects forms a homophase group, the number of the described utmost point be during greater than 4 even number per two mutual axisymmetric in extremely on, following adjustment connects forms a homophase group, power supply in the homophase group of each utmost point or utmost point centering is surveyed the position-error probe SC sigmal control of outer shroud yoke in the corresponding utmost point or utmost point centering radial deflection amount, resistance magnet ring joint be have in its magnetic gap side on the main yoke one narrow poor and on cross section, be the main yoke section of W type or V-type perpendicular to it.
2, circular magnetic suspension bearing according to claim 1, it is characterized in that: each key groove that is referred to as polar angle equates, the layout that permanent magnet, upper and lower adjustment coil connect yoke core, W type or V-type resistance magnet ring joint about by the main yoke axle, the angle of cut is half two plane symmetry of polar angle, each utmost point or extremely right position-error probe are positioned on the corresponding utmost point or the extremely right equidistant point.
3, circular magnetic suspension bearing according to claim 1, it is characterized in that: each polar angle equates, the layout that upper and lower adjustment coil connects yoke core, W type or V-type resistance magnet ring joint about by the main yoke axle, the angle of cut is half two plane symmetry of polar angle, all permanent magnets are only arranged about a plane symmetry by the main yoke axle, and each utmost point or extremely right position-error probe are positioned on the corresponding utmost point or the extremely right equidistant point.
4, a kind of circular magnetic suspension bearing of Three Degree Of Freedom constraint, connect and yoke core, upper and lower resistance magnet ring joint, position-error probe, Limit Bearing, electronic control part by upper and lower adjustment coil, it is characterized in that: also comprise: interior ring yoke, upper and lower major-minor yoke.Permanent magnet.Structural member is formed, each main magnetic circuit is by permanent magnet, on, following main yoke, in ring yoke and with last, magnetic gap between following main yoke constitutes, secondary magnetic circuit is by last, following main, secondary yoke, on, downward modulation directrix circle connects the yoke core, in ring yoke and with last, magnetic gap between following main yoke constitutes, in a part of outer wall of ring yoke be the inwall of magnetic gap between itself and main yoke, on, following main yoke conllinear, on, hinder down magnet ring joint the locating face coplane and by the main yoke axis and by this locating face locate on, under hinder magnet ring joint, locating faces of each adjacent two resistance magnet rings joint constitute have on the wedge shape space that is referred to as the utmost point main magnetic circuit and a pair of on, under adjust that coil connects and the yoke core, the number of the described utmost point be during more than or equal to 8 odd number every in extremely on, under adjust coil groups and become a homophase group, the number of the described utmost point be during more than or equal to 4 even number per two mutual axisymmetric utmost point centerings on, under adjust coil and connect and to form a homophase group, the ring yoke was in the position-error probe SC sigmal control of the corresponding utmost point or utmost point centering warp-wise off normal amount in electric current in the homophase group of each described utmost point or utmost point centering was surveyed, each resistance magnet ring joint be have in its magnetic gap side on the main yoke one narrow poor and overweighting the main yoke section that is W type or V-type on its cross section.
5, circular magnetic suspension bearing according to claim 4 is characterized in that: the interior ring yoke coaxial line when position-error probe employing and no off normal is by the combined type position-error probe of dress.
6, according to claim 4 or 5 described circular magnetic suspension bearings, it is characterized in that: each key groove that is referred to as polar angle equates, the layout that permanent magnet, upper and lower adjustment coil connect yoke core, W type or V resistance magnet ring joint all about by the main yoke axle, the angle of cut is half two plane symmetry of polar angle, the displacement that each utmost point or extremely right position-error probe record is positioned on the corresponding utmost point or the extremely right equidistant point.
7, according to claim 4 or 5 described circular magnetic suspension bearings, it is characterized in that: each polar angle equates, the layout that upper and lower adjustment coil connects yoke core, W type or V-type resistance magnet ring joint about by main magnetic axis, the angle of cut is half two plane symmetry of polar angle, permanent magnet only arranges about a plane symmetry by the main yoke axle, and the displacement that each utmost point or extremely right position-error probe record is positioned on the corresponding utmost point or the extremely right equidistant point.
8, a kind of circular magnetic suspension bearing of five degree of freedom constraint, by last, under adjust that coil connects and the yoke core, on, under hinder magnet ring joint, electronic control part, it is characterized in that: also comprise: annular yoke, on, following main, secondary yoke, permanent magnet, on, under shunt yoke, on, following position-error probe, on, the lower limit bearing, structural member is formed, each main magnetic circuit is by permanent magnet, on, following main yoke, annular yoke and with last, magnetic gap between following main yoke constitutes, go up secondary magnetic circuit by annular yoke and and last main yoke between magnetic gap, last shunting yoke, last coil connects the yoke core, going up secondary yoke constitutes, down secondary magnetic circuit by annular yoke and and following main yoke between magnetic gap, under shunt yoke, lower coil connects the yoke core, down secondary yoke constitutes, on, following main yoke coaxial line, on, hinder down magnet ring joint the locating face coplane and by the main yoke axis and by this locating face locate on, under hinder magnet ring joint, locating faces of each adjacent two resistance magnet rings joint constitute have in the wedge shape space that is referred to as the utmost point main magnetic circuit and a pair of on, under adjust that coil connects and the yoke core, the number of the described utmost point be during more than or equal to 3 odd number every in extremely on, under adjust coil and connect and to form the homophase group separately, the number of the described utmost point be during more than or equal to 4 even number per two mutual axisymmetric utmost point centerings on, under adjust coil and connect and to form the homophase group separately, the position-error probe SC sigmal control of each utmost point or the detection annular yoke that extremely electric current in the homophase group in the space is subjected to its homonymy of position warp-wise off normal amount, each resistance magnet ring joint at the corresponding utmost point or in extremely to the space be have in its magnetic gap side on the main yoke one narrow poor and on cross section, be the main yoke section of W type or V-type perpendicular to it.
9, circular magnetic suspension bearing according to claim 8 is characterized in that: a part of inwall that is referred to as the annular yoke of outer shroud yoke is the outer wall of simple cylindricality magnetic gap between itself and main yoke.
10, circular magnetic suspension bearing according to claim 8 is characterized in that: a part of outer wall of the annular yoke of ring yoke is the inwall of cylindrical magnetic gap between itself and main yoke in being referred to as.
11, according to Claim 8 or 9 or 10 described circular magnetic suspension bearings, it is characterized in that: upper and lower position-error probe can be all or one of them annular yoke coaxial line when adopting with no off normal by the combined type position-error probe of adorning.
12, according to Claim 8 or 9 or 10 or 11 described circular magnetic suspension bearings, it is characterized in that: each key groove that is referred to as polar angle all equates, the layout that permanent magnet, upper and lower adjustment coil connect yoke core, W type or V-type resistance magnet ring joint about by the main yoke axle, the angle of cut is half two plane symmetry of polar angle, the displacement that each utmost point or extremely right position-error probe record is positioned on the corresponding utmost point or the extremely right equidistant point.
13, according to Claim 8 or 9 or 10 or 11 described circular magnetic suspension bearings, it is characterized in that: each polar angle equates, the layout that upper and lower adjustment coil connects yoke core, W type or V-type resistance magnet ring joint about by main yoke, the angle of cut is half two plane symmetry of polar angle, permanent magnet only arranges about a plane symmetry by the main yoke axle and asymmetric about the bisector plane of upper and lower main yoke two faces relative to each other, and the displacement that each utmost point or extremely right position-error probe record is positioned on the corresponding utmost point or the extremely right equidistant point.
14, according to Claim 8 or 9 or 10 or 11 described circular magnetic suspension bearings, it is characterized in that: each polar angle equates, the layout that upper and lower adjustment coil connects yoke core, W type or V-type resistance magnet ring joint about by main yoke, the angle of cut is half two plane symmetry of polar angle, the permanent magnet and the layout of parts that is referred to as the couple yoke be only about a plane symmetry by the main yoke axle, and the displacement that each utmost point or extremely right position-error probe record is positioned on the corresponding utmost point or the extremely right equidistant point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93119380 CN1104730A (en) | 1993-11-17 | 1993-11-17 | Circular magnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93119380 CN1104730A (en) | 1993-11-17 | 1993-11-17 | Circular magnetic suspension bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1104730A true CN1104730A (en) | 1995-07-05 |
Family
ID=4992884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93119380 Pending CN1104730A (en) | 1993-11-17 | 1993-11-17 | Circular magnetic suspension bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1104730A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322244C (en) * | 2005-05-27 | 2007-06-20 | 南京航空航天大学 | Permanent magnet offset radial magnetic bearing |
| CN100392767C (en) * | 2003-01-21 | 2008-06-04 | 武汉理工大学 | Magnetic suspension hard disc single free degree multi-function experiment platform |
| CN100392768C (en) * | 2003-01-21 | 2008-06-04 | 武汉理工大学 | Magnetic suspension hard disk single free degree property experiment platform |
| CN100430168C (en) * | 2006-11-24 | 2008-11-05 | 南京航空航天大学 | Process for producing axial magnetic bearing structure |
| CN100432461C (en) * | 2005-05-18 | 2008-11-12 | 江苏大学 | AC-DC radial-axial mixed magnetic bearing having three degrees of freedom and method for controlling the same |
| CN102454701A (en) * | 2010-10-21 | 2012-05-16 | 吴小平 | (Multi-polarization orientation) conjugated laminated permanent magnet suspension bearing |
| CN104101372A (en) * | 2013-04-12 | 2014-10-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic-suspension bearing device and sensor fixation support thereof |
| CN113557361A (en) * | 2019-03-14 | 2021-10-26 | 株式会社易威奇 | Magnetic bearing, drive device provided with same, and pump |
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1993
- 1993-11-17 CN CN 93119380 patent/CN1104730A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392767C (en) * | 2003-01-21 | 2008-06-04 | 武汉理工大学 | Magnetic suspension hard disc single free degree multi-function experiment platform |
| CN100392768C (en) * | 2003-01-21 | 2008-06-04 | 武汉理工大学 | Magnetic suspension hard disk single free degree property experiment platform |
| CN100432461C (en) * | 2005-05-18 | 2008-11-12 | 江苏大学 | AC-DC radial-axial mixed magnetic bearing having three degrees of freedom and method for controlling the same |
| CN1322244C (en) * | 2005-05-27 | 2007-06-20 | 南京航空航天大学 | Permanent magnet offset radial magnetic bearing |
| CN100430168C (en) * | 2006-11-24 | 2008-11-05 | 南京航空航天大学 | Process for producing axial magnetic bearing structure |
| CN102454701A (en) * | 2010-10-21 | 2012-05-16 | 吴小平 | (Multi-polarization orientation) conjugated laminated permanent magnet suspension bearing |
| CN104101372A (en) * | 2013-04-12 | 2014-10-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic-suspension bearing device and sensor fixation support thereof |
| CN104101372B (en) * | 2013-04-12 | 2017-04-05 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of magnetic suspension bearing apparatus and its sensor fixed support |
| CN113557361A (en) * | 2019-03-14 | 2021-10-26 | 株式会社易威奇 | Magnetic bearing, drive device provided with same, and pump |
| CN113557361B (en) * | 2019-03-14 | 2023-10-13 | 株式会社易威奇 | Magnetic bearing, driving device provided with same, and pump |
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