CN203362827U

CN203362827U - Magnetic bearing

Info

Publication number: CN203362827U
Application number: CN2013203423761U
Authority: CN
Inventors: 岳光明; 蔚伟; 储彬; 金克锦; 黄世伟; 陈飞
Original assignee: Hefei Smarter Technology Group Corp
Current assignee: Hefei Smarter Technology Group Corp
Priority date: 2013-06-14
Filing date: 2013-06-14
Publication date: 2013-12-25
Anticipated expiration: 2023-06-14

Abstract

The utility model discloses a magnetic bearing. The bearing comprises a rotor and a stator component matched with the rotor, which are in suspension fit, wherein the stator component comprises a magnet pole unit which is arranged on the stator component and used for forming a rotor suspension power; N and S poles of the magnet pole unit are in the same direction as the axial direction of the stator. According to the bearing, the traditional manner that the N and S poles of the magnet pole unit are arranged in the radial direction of the stator is avoided, while the layout structure that the N and S poles are arranged according to the axial direction of the stator component is adopted, so that a unique effect that the rotor converts a magnet pole when working frequently is tactfully achieved.

Description

A kind of magnetic suspension bearing

Technical field

The utility model belongs to mechanical magnetic suspension field, is specifically related to a kind of magnetic suspension bearing.

Background technique

Magnetic suspension bearing (Magnetic Bearing) be utilize magnetic force by rotor suspension in the air, make between rotor and stator not have a kind of apparatus structure of Mechanical Contact.With traditional ball bearing, sliding bearing and filmatic bearing, compare, there is not Mechanical Contact in magnetic bearing, rotor can run to very high rotating speed, have that mechanical wear is little, energy consumption is low, noise is little, the life-span is long, without lubricated, without advantages such as oil pollutions, be specially adapted in high speed, vacuum, the particular surroundings such as ultra-clean.Current magnetic suspension bearing, so far all still continue to use as shown in Figure 1, be also that the stator inner wall place is along its circumferential uniform many armature structures that are wound with coil, thereby the N that relies on many group surrounding rotors to arrange, the mode of structure that the S utmost point is arranged along rotor radial, realize the electromagnetism absorption suspension effect for rotor, said structure has no doubt possessed the magnetic suspension function based on rotor, but the defect of its existence still can't neglect, mainly be: on the one hand, when rotor one circle, whenever each zone of rotor all will inevitably be repeatedly frequently through as shown in Figure 1 respectively organize N, the S utmost point (in Fig. 1, dotted portion is its magnetic line of force flow path schematic diagram), on it corresponding induction region also will correspondence in addition magnetic pole transform, also constantly discharged and recharged operation, can guarantee that just now each is to N, the S utmost point is for the suction-operated of rotor, yet, rotor must be constantly to rotate when work, each zone of above-mentioned rotor or else cracked ends is crossed and is respectively organized N, the S utmost point and charge and discharge phenomena frequently constantly occurs, and then unavoidably make it produce eddy current loss and cause electric heating effect, finally cause rotor to produce superheating phenomenon, gently affect its normal using effect, heavy produce the mistake cause thermal damage phenomenon of equipment, on the other hand, N, the formation of the S utmost point is all to rely on armature and coil jointly to form, the armature of conventional construction or be whole integrally formed with stator, the whole coiling of coil, once and bearing machining just completes and can't be changed, while as need, running into special occasions such as needing to increase suspending power, can only be undertaken by the mode of changing bearing, change loaded down with trivial details and cost is high, go and be fixed on rotor inner wall more again or after making in advance armature coiling, this mode not only causes each armature top can't form accurate circumferential surface because of various alignment errors etc., the decentraction phenomenon that rotor outer wall and stator inner wall also occur, thereby cause both at all can't normal adaptive utmost point work, thereby bring very big puzzlement to the practical operation personnel.

Summary of the invention

The purpose of this utility model is to provide a kind of magnetic suspension bearing simple in structure, and magnetic pole in the time of can effectively reducing working rotor transforms number of times, and its eddy current loss is low and generate heat littlely, and working efficiency can be greatly improved.

For achieving the above object, the utility model has adopted following technological scheme: a kind of magnetic suspension bearing, comprise rotor and adaptive stator module with it, and form the suspension matching relationship between the two; Described stator module comprises the magnetic pole unit that is used to form rotor suspension power be located thereon, and the N of described magnetic pole unit, S utmost point arranged direction and stator axis length direction arrange in the same way.

Major advantage of the present utility model is: abandoned the traditional setting along the stator radial arrangement by the N of magnetic pole unit, the S utmost point, and break through the layout that its N of unusual employing, the S utmost point and stator module axial length direction arrange in the same way, thereby played cleverly the frequent effect unique that transforms magnetic pole while avoiding working rotor, during practical operation, one side is due to the existence of magnetic pole unit, rely on its magnetic force, also just realized the effect of the magnetic suspension for rotor that conventional construction can be realized, on the other hand, due to above-mentioned unique N of the present utility model, S utmost point arrangement, no matter how rotor realizes rotating operation under external power, when rotating a circle, on it, all only can there be the change procedure of single polarity in each zone when circumferentially moving, if be also that certain part area of rotor is in the N of magnetic pole unit utmost point magnetization scope, now how circumferentially rotate in this zone, because the area of influence of the N utmost point is the impact along the stator module circumferential direction, now this zone of rotor is also just all the time in unipolar magnetized state, also just avoided traditional N, the frequent passive magnetization phenomenon of rotor that the different magnetic pole unit of each polarity on S utmost point setting causes along the stator circumferential arrangement, it is simple in structure easy-to-use, eddy current loss amount and heating value in the time of can reducing working rotor greatly, working efficiency can be greatly improved.

The accompanying drawing explanation

The working principle sectional view that Fig. 1 is traditional magnetic suspension bearing;

Fig. 2 is assembling condition plan view of the present utility model;

Fig. 3 is the structure sectional view after Fig. 2 removes rotor;

The three-dimensional structure diagram that Fig. 4 is stator module;

The explosive decomposition figure that Fig. 5 is Fig. 4;

Fig. 6-7 are the utility model fundamental diagram.

Embodiment

A kind of magnetic suspension bearing, comprise rotor and adaptive stator module with it, forms the suspension matching relationship between the two; Described stator module comprises the magnetic pole unit that is used to form rotor suspension power 10 be located thereon, and the N of described magnetic pole unit 10, S utmost point arranged direction and stator module axial length direction arrange in the same way.

The utility model practical structures is as shown in Fig. 2-6, thereby by having abandoned the N of magnetic pole unit 10, S extremely all along traditional setting of stator module radial arrangement, the layout arranged in the same way to break through its N of unusual employing, the S utmost point and stator module axial length direction, thus played cleverly the frequent effect unique that transforms magnetic pole while avoiding working rotor, during practical operation, one side is due to the existence of magnetic pole unit 10, rely on its magnetic force, also just realized the effect of the magnetic suspension for rotor that conventional construction can be realized, on the other hand, due to above-mentioned unique N of the present utility model, S utmost point arrangement, no matter how rotor realizes rotating operation under external power, when rotating a circle, on it, all only can there be the change procedure of single polarity in each zone when circumferentially moving, give an example: if the zone foremost of rotor is in the N of magnetic pole unit 10 utmost point magnetization scope, now how circumferentially rotate in this zone, the circumferential direction of having shrouded stator module due to the area of influence of the N utmost point, now this zone of rotor is also just all the time in unipolar magnetized state, also just avoided traditional N, the frequent passive magnetization phenomenon of rotor that the different magnetic pole unit 10 of each polarity on S utmost point setting causes along the stator circumferential arrangement.During real work, can consider that the profile that described stator module is set to as shown in Figure 2-5 is semicircle shape, at least comprise the semicircle pressing plate 11 that two plate faces are parallel to each other and be arranged in the electromagnet section 12 between two pressing plate 11 plate faces, the vertical pressing plate 11 plate faces of N, S utmost point arranged direction of described electromagnet section 12 are arranged, like this, no matter semicircle shape pressing plate 11 is to adopt directly cutting or other global formation mode on the one hand, the inwall that forms after assembling coordinates the stator module formed at its two pressing plate 11 all can guarantee the clearence degree with respect to the rotor outer wall, also can accurately meet the concentricity requirement of stator module inwall and rotor outer wall, thereby avoid making traditional electromagnet and separating of stator and the later stage is installed Concentricity tolerance phenomenon between the stator that may cause and rotor, on the other hand, the namely semicircle shape stator module as shown in Figure 4 that semicircle shape pressing plate 11 forms, now, rotate the number of turns regardless of rotor, now epitrochanterian appointment magnetized area is still also the one pole magnetization, even be also the polarity transformation of---nonpolarity---the N utmost point of the N utmost point, or be the polarity transformation of---nonpolarity---the S utmost point of the S utmost point, epitrochanterian same magnetized area forever only can change once by magnetic pole when it rotates a circle, eddy current loss amount and heating value when this unique polarity arrangement mode can reduce working rotor greatly, working efficiency can be greatly improved.

As further preferred version of the present utility model: as shown in Figure 4, stator module is the semicircle shape symplex structure; Described electromagnet section 12 is four and uniform along its arc direction on pressing plate 11 plate bodys; Described every two pressing plates that are fitted to each other 11 and therebetween electromagnet section 12 form one group of described magnetic pole unit 10; Described magnetic pole unit 10 is many groups and axially arranges successively along stator module, 11 faces laminatings of the cooperation of two on each magnetic pole unit 10 pressing plate and the 11 polarity homopolarities settings of this two pressing plate.The structure that closely cooperates between above-mentioned electromagnet section 12 and pressing plate, in fact also be about to the whole channel passed through for the confession magnetic line of force that formed between the plate body of armature in electromagnet section 12 and pressing plate 11, because rotor is positioned at pressing plate 11 inwall places, and two the closing on pressing plate 11 and arrange for laminating of 10 of each adjacent pole unit, the three groups of magnetic pole units 10 shown in the utility model Fig. 4-7 of take are example, now each internal face of each pressing plate 11 also forms the N utmost point along its axial direction successively, and---the S utmost point------the S utmost point is constructed by the polarity of the N utmost point---N utmost point---the S utmost point, finally to guarantee its work validity, on the other hand, the passage flow through for convenience of the magnetic line of force due to the armature in electromagnet section 12 formation itself, also can regard as for " water channel " of water flow and exist, how many water and great " water channel " can flow through, many thick armature can produce corresponding large active force naturally, but, traditional electrical magnet is often organized single electromagnet unit by list and is just wanted to reach great magnetic-adsorption effect, this is obviously wrong, once actual, use, not only can be because of the meaningless situation that causes stator blocked up that thickens of armature thickness, while is due to the suitability of rotor and stator, the blocked up phenomenon that also just causes the thickness of rotor own, the utility model is by adopting the distributing design, be also that arranged in rows is organized magnetic pole unit 10 more, thereby by stator module is constantly extended and fills the some groups of magnetic pole units 10 that satisfy specified requirement along its axial direction, thereby the mode that increases magnetic pole unit 10 numbers by reducing armature thickness reaches the high magnetic force suction-operated for rotor equally, produce great magnetic force as wanted, can correspondingly fill out and establish how many groups of magnetic pole units 10, easy to use and quick, effect is also very obvious, this can obviously find out the varied in thickness of rotor in as Fig. 6-7, and finally rotational stability and the energy consumption for rotor provide very big assurance.Simultaneously, the arrangement of a plurality of electromagnet section 12 on every group of magnetic pole unit 10, to consider if only arrange an electromagnet section 12 on the magnetic pole unit 10 of direct every group of profile semicircular in shape shape, and the armature direction of this electromagnet section 12 to be also its N, S extreme direction meet and a series of requirements such as the stator module axis arranges in the same way, the coil winding of this electromagnet section 12 also just must be difficult to even say and can't realize so; The utility model is by experiment in many ways, employing is in the mode of a plurality of electromagnetism iron wire bag replace curve by straight lines, in other words, by on a curve theory, by unlimited straight line, forming this theory, a plurality of electromagnet section 12 that is normal coiling by layout forms the stator module of semicircular in shape shape, thereby reduces difficulty of processing; Simultaneously, by the pressing cooperating structure of itself and pressing plate 11, during actual the use, pressing plate can direct extraneous integral body process, and after the coiling of line bag independence, then modularization assembling gets final product separately, and it is simple in structure and very applicable, and market prospects are wide.

Further, as Figure 2-3, described magnetic suspension bearing comprises the base part as its pedestal, ventricumbent being arranged on base part of described stator module inside arc.In other words, whole bearing outer ring of the present utility model position forms for adopting the stator module button to be located on base part, finally to guarantee the space boundary effect for rotor.

During the actual use of the utility model, adopt two electromagnet sections 12 that respectively organize the topmost part on magnetic pole unit 10 to realize the stable suspersion of rotor, making a concerted effort for offsetting the gravity of rotor of the vertical direction that these two groups of electromagnet sections 12 produce, and be positioned at the mutual balance of cross component force that two electromagnet sections 12 that its bilateral symmetry arranges produce each other, guarantee the lateral stability of rotor.Its whole mechanism, for traditional bearing mechanism, has without the advantage such as friction, low noise, rotating speed be fast, extremely is applicable in high speed, vacuum, the particular surroundings such as ultra-clean.

Claims

1. a magnetic suspension bearing, comprise rotor and adaptive stator module with it, forms the suspension matching relationship between the two; Described stator module comprises the magnetic pole unit that is used to form rotor suspension power (10) be located thereon, and it is characterized in that: the N of described magnetic pole unit (10), S utmost point arranged direction and stator module axial length direction arrange in the same way.

2. magnetic suspension bearing according to claim 1, it is characterized in that: described stator module profile is semicircle shape, at least comprise the semicircle pressing plate (11) that two plate faces are parallel to each other and be arranged in the electromagnet section (12) between two pressing plates (11) plate face, the N of described electromagnet section (12), the vertical pressing plate of S utmost point arranged direction (11) plate face are arranged.

3. magnetic suspension bearing according to claim 2, it is characterized in that: stator module is the semicircle shape symplex structure; Described electromagnet section (12) is four and uniform along its arc direction on pressing plate (11) plate body.

4. according to the described magnetic suspension bearing of claim 2 or 3, it is characterized in that: described every two pressing plates that are fitted to each other (11) and therebetween electromagnet section (12) form one group of described magnetic pole unit (10); Described magnetic pole unit (10) is many groups and axially arranges successively along stator module, face laminating and the setting of this two pressing plate (11) polarity homopolarity between the cooperation pressing plate of two on each magnetic pole unit (10) (11).

5. magnetic suspension bearing according to claim 4, it is characterized in that: described magnetic suspension bearing comprises the base part as its pedestal, ventricumbent being arranged on base part of described stator module inside arc.