CN101483378A - Asynchronous magnetic couplings for high temperature resistant high performance oblique slot type rotor - Google Patents
Asynchronous magnetic couplings for high temperature resistant high performance oblique slot type rotor Download PDFInfo
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- CN101483378A CN101483378A CNA2009100244490A CN200910024449A CN101483378A CN 101483378 A CN101483378 A CN 101483378A CN A2009100244490 A CNA2009100244490 A CN A2009100244490A CN 200910024449 A CN200910024449 A CN 200910024449A CN 101483378 A CN101483378 A CN 101483378A
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Abstract
The present invention relates to technical field of magnetic transmission in mechanical engineering, particularly a high temperature resistant high performance tapered slot type rotor asynchronous magnetic coupling, which comprises an outer rotor with magnetism, a inner rotor without magnetism, separation sleeve, and adjustable magnetic pole piece with teeth; the outer rotor comprises an outer rotor basal body and magnetic pole; the magnetic pole forms a certain helix angle with axial cord; the inner rotor comprises a inner rotor basal body, a magnetic induction prime conductor and end rings; the magnetic induction prime conductor embeds in angular deep groove of the inner rotor basal body in helical shape; the separation sleeve covers the inner rotor and is set between the inner rotor and the outer rotor; the adjustable magnetic pole piece with teeth is fixed on the machine body and can be disposed inside or outside of the separation sleeve; the outer magnetic rotor forms an outer layer air gap with the adjustable magnetic pole piece; the inner rotor forms an inner layer air gap with the adjustable magnetic pole piece. The above structure is disposed on the inside and outside circular conical surface to form circular cone asynchronous magnetic transmission. The advantages of the invention are as following: high temperature resistant, smooth, steady and reliable transmission, high usage of permanent magnet and big transmitting torque of unit volume.
Description
Technical field
The present invention relates to the high temperature resistant oblique slot type rotor asynchronous magnetic couplings of high-performance of the technical field of magnetic transmission in the mechanical engineering, particularly a kind of magnetic field modulation.It is mainly used in the working temperature height, production environment is required in dead-tight transmission device or the equipment, is particularly suitable for not having the axle envelope, does not have leakage, resistant to elevated temperatures magnetic drive pump, magnetic agitation still, magnetic valve etc.
Background technology
Shortcomings such as traditional mechanical coupling is widely used in machine driving and connects, and generally all adopts contact transmission campaign and power, and existence is impacted greatly, the life-span is short, need to lubricate.At present, commonly used synchronous mode magnetic drive device according to the magnetic material same sex repel each other, principle of opposite sex attraction comes work, so being housed, the inner and outer rotors of permanent magnet can realize contactless transmission, overcome above-mentioned shortcoming, because of inside and outside magnet rotor contactless, leave the gap between the two, so usually that separation sleeve is set is hermetically sealed to realize between, there is not the transmission of leakage, be widely used in industries such as chemical industry, oil, food, particularly wider in the application of not having axle envelope, non-leakage magnetic pump and magnetic agitation still.But this synchronous mode magnetic drives also exists certain limitation on using, because interior magnet rotor contacts with medium in the seal isolation cover, higher or the running back self-temperature increase of medium temperature that transmits when needs, the demagnetization phenomenon just easily takes place when if the temperature of permanent magnet is higher than its Curie-point temperature on the interior magnet rotor, make magnetic drives ability drop even cisco unity malfunction, these have restricted the scope of application of magnetic drives.The actual serviceability temperature of Nd-Fe-B permanent magnet because the remanent magnetism temperature coefficient is bigger, generally can only be limited to below 80 ℃.As adopt higher and the samarium cobalt permanent magnet body that temperature coefficient is lower of Curie temperature, though the requirement of satisfied temperature to a certain extent, because its price costliness very still should not generally adopt at present.The actual serviceability temperature of samarium cobalt permanent magnet body generally is limited to below 250 ℃.
Chinese patent 200420025250.2 discloses a kind of permanent magnet induction magnetic drive device, because internal rotor need not permanent magnetic material can be realized the transmission requirement under the high temperature, but above-mentioned magnetic drives is because its permanent magnet can not provide stronger high speed rotating magnetic field, the strip conductor radial depth inlayed of internal rotor is less in addition, the induced current that produces in the radial direction of sliver and the distributional difference of the magnetic line of force are little, so outer crowded DeGrain of electric current in the internal rotor in the work, just be difficult to produce the kelvin effect of deep trouth, so transmission performance is restricted.This kind magnetic coupling generally runs on the situation of stabilization of speed in addition, and when the speed of service had rapid variation, when for example speed diminished, revolutional slip is excessive will to cause that rotor loss sharply increases, and efficient reduces, heating is serious.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming and defect, a kind of asynchronous magnetic couplings of magnetic field modulation formula skewed rotor structure is provided, can save the permanent magnet consumption, improve reliable transmission, reduce and safeguard, raise the efficiency, reduce cost, the drive system that particularly is applicable to magnetic drive pump, magnetic agitation still, magnetic valve and other apparatus transmission needs of (medium temperature up to 300 ℃～450 ℃) under the condition of high temperature, and can be used for the speed of service situation jumpy is arranged.
For achieving the above object, technical scheme of the present invention is:
Asynchronous magnetic couplings for high temperature resistant high performance oblique slot type rotor, comprise inside and outside rotor: it is characterized in that: increased seal isolation cover, toothed adjustable magnetic pole piece, external rotor is made up of external rotor matrix and external rotor permanent magnet body, and internal rotor is made up of internal rotor matrix, magnetic induction conductor and end ring; Seal isolation is placed between internal rotor and the external rotor, cover is contained on the internal rotor, toothed adjustable magnetic pole piece places between internal rotor and the external rotor, is fixed on the body, and the external rotor permanent magnet body glues by the N utmost point, the alternate tight arrangement of S utmost point even number and is contained on the external rotor matrix internal diameter circle wall; Internal rotor matrix periphery is offered oblique deep trouth or spiral groove, imbeds to form the magnetic induction conductor behind the good conductor material, and forms the cage rotor of sealing, constitutes faradic passage with end ring.
In the above-mentioned shaft coupling, the modes of emplacement of toothed adjustable magnetic pole piece can have two kinds: the one, place the outer tight and outer rotor matrix of seal isolation cover, and another is to place in the seal isolation cover and near the internal rotor matrix;
In the above-mentioned shaft coupling, the N utmost point of external rotor permanent magnet body and S be monolithic magnet one utmost point very; Or polylith same polarity, unidimensional bar-shaped magnet consist of a utmost point;
In the above-mentioned shaft coupling, the magnetic pole of external rotor permanent magnet body is magnetized by radial multi-pole by the compacting of Nd-Fe-Bo permanent magnet material bonding again and forms;
In the above-mentioned shaft coupling, the external rotor permanent magnet body becomes 0-45 degree angle with axis;
In the above-mentioned shaft coupling, the oblique deep trouth that internal rotor matrix periphery is offered evenly distributes, and becomes 0-45 degree angle with axis, and equates that with the angle of external rotor permanent magnet body with the axis angle direction is identical.
Design feature of the present invention is as follows: (1) external rotor inwall is equipped with some N utmost points and the extremely tight permanent magnet alternately of S along circumference, some N utmost points and S extremely closely alternately permanent magnet can be with axis angled or 0 degree (helical angle ≠ 0 or helical angle=0), or external rotor is bondd by Nd-Fe-Bo permanent magnet material, and suppressing magnetizes by radial multi-pole again forms magnetic pole, magnetic pole and axis form an angle or 0 degree, form the high-energy rotating magnetic field when external rotor rotates; (2) internal rotor is offered some oblique deep trouths (or spiral groove) in the matrix periphery, and deep trouth correspondingly becomes 0-45 degree angle with axis, and wherein the good conductor material that embeds forms the helical form cage rotor structure of sealing; (3) groove depth should easily produce the kelvin effect of deep trouth on the internal rotor, makes CURRENT DISTRIBUTION present certain distributivity (see figure 7) along groove depth; (4) between inner and outer rotors, form the effective clearance, a separation sleeve and a toothed adjustable magnetic pole piece with sealing function is set in the gap forms.
When prime mover drove the external rotor rotation, the high-energy magnetic field on the outer magnet rotor and the helical form cage type conductor of the sealing on the internal rotor produced induced current, by counter magnetic field and the driving rotor coupling transfer torque that induced current produced.Because driven rotor does not need permanent magnetic material yet in this magnetic drives, because the iris action of separation sleeve, external rotor does not contact with the medium that the institute transmission is passed, and so just can take some cooling provisions, the temperature when reducing external rotor and working.So the magnet rotor permanent magnet is subjected to the restriction of medium temperature and the problem that influences in can having overcome in the prior art.
Form helical conductor owing to embed the good conductor material in the internal rotor deep trouth, form complete enclosed construction with two end ring of end again and form special cage rotor structure.Adopt the deep bar rotor structure can utilize the kelvin effect effect of deep trouth to realize of the requirement of the resistance of rotor, occasion jumpy is arranged thereby be adapted to operate in low speed or high speed or speed with rotation speed change.The asynchronous magnetic transmission in when starting and load running when revolutional slip is big, because the internal rotor rotating speed is lower, the power frequency that flows through in the rotor conductor is higher, the magnetic flux of conductor bottom interlinkage is than conductor top many (Fig. 6), the leakage reactance of conductor bottom is also big than top, and the reactance of bottom land and notch differs bigger again, and the reactance of bottom land part is big, electric current is little, the slot-open-section reactance is little, electric current big (Fig. 7), and the distribution of electric current is very uneven in the rotor conductor, the electric current major part be extruded into notch and the trench bottom conductor seldom, even be zero, cause the real area of conductor to reduce, the resistance of rotor increases, limit the electric current variation, thereby increased the output torque.This helps cutting down the consumption of energy, and reduces heating.And when rotating speed was higher, the outer crowded phenomenon of electric current disappeared, and CURRENT DISTRIBUTION is even, and the real area that is equivalent to conductor increases, and the resistance of rotor reduces, and is high rotating speed, big moment output state, and magnetic drives efficient height, heating is few.
Because the groove on the internal rotor is offered angled with axis and be opposite certain angle (helical form layout) with magnet arrangement and axis thus can make starting performance better, transmission is more steady.Embed the good conductor material require in the internal rotor deep trouth and satisfy fusing point height, characteristics such as corrosion-resistant, just can be suitable for special occasions such as strong acid, highly basic, high temperature.
Between inner and outer rotors, form the effective clearance, a separation sleeve and a toothed adjustable magnetic pole piece with sealing function is set in the gap forms.Adopt the advantage of toothed adjustable magnetic pole piece to be: to form outer air gap between outer magnet rotor and the adjustable magnetic pole piece, form the internal layer air gap between internal rotor and the adjustable magnetic pole piece, fixing adjustable magnetic pole piece can air magnetic field, modulation gap, make that permanent magnet provides stronger high speed rotating magnetic field on the external rotor, internal rotor is driven when low speed easily, and stable working is reliable during normal operation, and transmission efficiency is higher, save cost, the unit volume transmitting torque is increased.The number of teeth when change adjustable magnetic pole piece can change the velocity of rotation of inner and outer rotors in addition, so also can realize the function of transformation of speed.
Description of drawings
Fig. 1 is the overall construction drawing of the embodiment of the invention 1
Fig. 2 is embodiment 1 an inner and outer rotors sectional drawing
Fig. 3 is the overall construction drawing of the embodiment of the invention 2
Fig. 4 is embodiment 2 inner and outer rotors sectional drawings
Fig. 5 inner rotor shaft down fold schematic diagram
Fig. 6 is deep trouth stray flux distribution figure
Fig. 7 is a deep trouth conductor current density profile
Fig. 8 is a circular cone asynchronous magnetic transmission schematic diagram
Fig. 9 is a cone axial chute schematic diagram
Label among the figure is represented respectively: 1. magnetic induction conductor; 2. end ring; 3. internal rotor matrix; 4. seal isolation cover; 5. external rotor matrix; 6. external rotor permanent magnet body; 7. sealing ring; 8, toothed adjustable magnetic pole piece 9, body; I, internal rotor; II, external rotor map parameter h are the groove depth height; J is a current density.
Embodiment
General structure of the present invention as shown in Figure 1, this device comprises: the external rotor of being made up of external rotor matrix 5 and external rotor permanent magnet body 6, internal rotor, seal isolation cover 4 and the toothed adjustable magnetic pole piece 8 be made up of internal rotor matrix 3, magnetic induction conductor and end ring 2.Seal isolation cover 4 places between internal rotor and the external rotor, and cover is contained on the internal rotor.Toothed adjustable magnetic pole piece 8 places between internal rotor and the external rotor, be screwed on body 9, its modes of emplacement can have two kinds: the one, place seal isolation cover 4 outer tight and outer rotor matrix 5, and another is to place in the seal isolation cover 4 and near internal rotor matrix 3.External rotor is made up of external rotor matrix 5 and external rotor permanent magnet body 6, and external rotor permanent magnet body 6 glues by the N utmost point, the alternate tight arrangement of S utmost point even number and is contained on the external rotor matrix 5 internal diameter circle wall, and the N utmost point and the S utmost point can the monolithic magnet be a utmost point both; Also can the polylith same polarity, unidimensional bar-shaped magnet consists of a utmost point; External rotor permanent magnet body 6 can become 0-45 degree angle with axis; Or the magnetic pole of external rotor permanent magnet body 6 magnetizes by radial multi-pole by Nd-Fe-Bo permanent magnet material bonding compacting again and forms, and magnetic pole becomes 0-45 degree angle with axis.Internal rotor is made up of internal rotor matrix 3, magnetic induction conductor 1 and end ring 2, magnetic induction conductor 1 is to offer oblique deep trouth or spiral groove in driven rotor matrix periphery, deep trouth can become 0-45 degree angle with axis, wherein imbed the cage rotor that the good conductor material forms sealing, constitute faradic passage with end ring 2.
Fig. 8 is the schematic diagram of circular cone asynchronous magnetic transmission device, external rotor matrix 5 inner surfaces are conical, external rotor permanent magnet body 6 glues by the N utmost point, the alternate tight arrangement of S utmost point even number and is contained on the external rotor matrix 5 internal diameter circle wall, and the N utmost point and the S utmost point can the monolithic magnet be a utmost point both; Also can the polylith same polarity, unidimensional bar-shaped magnet consists of a utmost point; The external rotor permanent magnet body can become 0-45 degree angle to arrange with axis.Internal rotor matrix 3 is conical, magnetic induction conductor 1 is to offer some oblique deep trouths in internal rotor matrix periphery, deep trouth can become 0-45 degree angle with axis, wherein imbeds the conical cage rotor that the good conductor material forms sealing, constitutes faradic passage with end ring 2.
The asynchronous magnetic transmission adopts toothed adjustable magnetic pole piece modulation external rotor magnetic field to make air gap produce harmonic field, make external rotor that stronger rotating magnetic field is provided by air-gap harmonic magnetic field, the easier internal rotor conductor cutting magnetic line that makes produces induced current, produce magnetic field and air-gap harmonic magnetic field acting in conjunction driving internal rotor rotation and transmitting torque by induced current, also can realize the function of transformation of speed.The effect of oblique deep slot type rotor also makes the easier cutting magnetic line of conductor.And because the modulating action of adjustable magnetic pole piece makes external rotor that stronger rotating magnetic field is provided, thereby the utilance of permanent magnet is improved greatly, the transmission performance of magnetic transmission is higher.
Claims (7)
1. asynchronous magnetic couplings for high temperature resistant high performance oblique slot type rotor, comprise internal rotor (I) and external rotor (II), it is characterized in that: increased seal isolation cover (4), toothed adjustable magnetic pole piece (8), external rotor (II) is made up of external rotor matrix (5) and external rotor permanent magnet body (6), and internal rotor (I) is made up of internal rotor matrix (3), magnetic induction conductor (1) and end ring (2); Seal isolation cover (4) places between internal rotor (I) and the external rotor (II), cover is contained on the internal rotor (I), toothed adjustable magnetic pole piece (8) places between internal rotor (I) and the external rotor (II), be fixed on the body (9), external rotor permanent magnet body (6) glues by the N utmost point, the alternate tight arrangement of S utmost point even number and is contained on external rotor matrix (5) the internal diameter circle wall; The internal rotor matrix
(3) periphery is offered oblique deep trouth or spiral groove, imbeds to form magnetic induction conductor (1) behind the good conductor material, and forms the cage rotor of sealing, constitutes faradic passage with end ring (2).
2. the described asynchronous magnetic couplings of claim 1 is characterized in that: toothed adjustable magnetic pole piece (8) places the outer tight and outer rotor matrix (5) of seal isolation cover (4) or places in the seal isolation cover (4) and near internal rotor matrix (3).
3, the described asynchronous magnetic couplings of claim 1 is characterized in that: the N utmost point of external rotor permanent magnet body (6) and S be monolithic magnet one utmost point very; Or polylith same polarity, unidimensional bar-shaped magnet consist of a utmost point;
4, the described asynchronous magnetic couplings of claim 3 is characterized in that: the magnetic pole of external rotor permanent magnet body (6) is magnetized by radial multi-pole by the compacting of Nd-Fe-Bo permanent magnet material bonding again and forms.
5, claim 1,3 or 4 described asynchronous magnetic couplings, it is characterized in that: external rotor permanent magnet body (6) becomes 0-45 degree angle with axis;
6, the described asynchronous magnetic couplings of claim 1, it is characterized in that: the oblique deep trouth that internal rotor matrix (3) periphery is offered evenly distributes, and become 0-45 degree angle with axis, and equate that with the angle of axis angle direction is identical with external rotor permanent magnet body (6).
7. according to claim 1 and 2 described asynchronous magnetic couplings, it is characterized in that: external rotor matrix (5) inner surface is for conical, and internal rotor matrix (3) is conical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100244490A CN101483378B (en) | 2009-02-24 | 2009-02-24 | Asynchronous magnetic couplings for high temperature resistant high performance oblique slot type rotor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100244490A CN101483378B (en) | 2009-02-24 | 2009-02-24 | Asynchronous magnetic couplings for high temperature resistant high performance oblique slot type rotor |
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| Publication Number | Publication Date |
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| CN101483378A true CN101483378A (en) | 2009-07-15 |
| CN101483378B CN101483378B (en) | 2011-08-10 |
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| CN2009100244490A Expired - Fee Related CN101483378B (en) | 2009-02-24 | 2009-02-24 | Asynchronous magnetic couplings for high temperature resistant high performance oblique slot type rotor |
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