CN107116191A - A kind of complex and spiral magnetic stirrer - Google Patents
A kind of complex and spiral magnetic stirrer Download PDFInfo
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- CN107116191A CN107116191A CN201710339491.6A CN201710339491A CN107116191A CN 107116191 A CN107116191 A CN 107116191A CN 201710339491 A CN201710339491 A CN 201710339491A CN 107116191 A CN107116191 A CN 107116191A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/02—Use of electric or magnetic effects
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Abstract
The invention discloses a kind of complex and spiral magnetic stirrer, it can be widely applied to the material electromagnetic processing such as metal continuous cast, semi-solid casting field.The invention is characterised in that yoke group is compounded to form by two sets of different independent yoke groups；Described yoke group is made up of the yoke back of the body and several yoke ends；Yoke knapsack contains thin wall cylinder-shaped, two kinds of structures of plate shape.Yoke end is arranged in two kinds of yoke backs, and the yoke end is uniformly arranged on strand periphery, and the normal angle of plane is 30 75 ゜ where all yoke end faces, and the polar surface of magnetic pole is directed to strand center.There is 1 100mm gap between two kinds of yoke back ofs the body.Power supply is supplied using two-phase or three phase mains, and a set of or two sets of power supplys can be used.During using two sets of power supplys, it is particularly suitable for the situation larger to axial force demand.The present invention can drive metal bath to be spinned motion, realize the pressure uniform stirring to metal bath, can improve slab quality, suppress liquid fluctuating.
Description
Technical field
The present invention is applied to electromagnetic casting and material electromagnetic processing forming field, particular for metal continuous cast, semi-solid casting
Make and rotating magnetic field electromagnetic agitator used in directional solidification process.
Background technology
The tight requirement of material property and high standard force researchers to continually develop new material, study new technology.Electricity
There is the advantage that other physical fields can not be substituted in magnetic field, and it receives the extensive concern of researchers.Electromagnetic field is filled
Put can in the case where not contacted directly with metal bath by heat energy and transferring kinetic energy to metal bath, molten metal is not contaminated.
Electromagnetic agitation is the flowing of control metal bath to improve the effective means of slab quality.Rotary EMS can refine local strand
Solidified structure and uniformly circumferentially Temperature Distribution, but the heat and mass transfer process of axial direction is not abundant enough, and with the increase of stirring intensity
Negative segregation phenomenon occurs therewith.Linear electromagnetic stirring can be such that metal bath is moved in vertical direction, and the effect of axial force can subtract
Liquid fluctuating in little crystallization device and the convection current on vertical direction is strengthened, but the flowing under-activity of radial direction.So, it is single
Magnetic field is unsatisfactory to the effect for improving slab quality.Spiral electromagnetic agitation combines rotary EMS and travelling-wave electromagnetic stirring
The characteristics of, metal bath can be made to spin motion, forced convertion adds heat exchange and solute is exchanged, and reduces metal bath
Center and the thermograde of solidification front, so as to increase equiaxial crystal ratio and reduce center segregation etc..What spiral electromagnetic agitation was produced
Axially stream is collided with Mold stream stock, can slow down liquid level to lower recess.Therefore, spiral electromagnetic agitation is used as improvement material
The means of performance will increasingly be taken seriously.
Helical magnetic field is the superposition of rotating excitation field and travelling-magnetic-field spatially, such as to realize spiral electromagnetic agitation, can be used
Composite stirring mode.At present, three kinds of modes can be summarized as：The inside and outside superposition of rotating excitation field and travelling-magnetic-field, rotating excitation field it is upper
Lower to stack, the circumference of travelling-magnetic-field is side by side.Such method can drive metal bath to be spinned motion, strengthen on axial and circumferential
Solute and heat exchange, increase equiaxial crystal ratio, reduce center segregation, improve product quality.Except such method, also yoke end face phase
Carry on the back tilted-putted for yoke, yoke end face carries on the back stepped arrangement relative to yoke；This kind of method can equally realize spiral
Electromagnetic agitation.The Research Thinking of this two classes method is embodied in publication number CN87104014A, publication number CN86104510A, publication number
In 102825245A and publication number 102554165A Chinese invention patent application case, and publication number CN201476606U and public affairs
In the number of opening CN87204232U Chinese utility model patent application case.Traditional inside and outside two complete equipment superposition adds device
Weight, and outer layer equipment at a distance of metal bath farther out, the effect of outer layer equipment mixing power can be reduced substantially.In rotating excitation field equipment
The lower circumferential weight for equally adding device side by side of stacking and travelling-magnetic-field equipment, adds manufacturing cost.For many set rotations
Magnetic field means stacked on top is together, although axial traveling wave power can be produced inside metal bath, but by vertical cross-section
On yoke number of permutations and yoke carry on the back successional influence, revolving force of the size much smaller than circumference of axial force.Similarly, for
The circumferential array of travelling-magnetic-field equipment, the size of its peripheral force is much smaller than axial force, therefore can not realize abundant auger.It is right
Placed in yoke end face place plane relative to the inclination of the yoke back of the body or step type, its core concept is that yoke end face place is put down
There is certain angle in face relative to the yoke back of the body.After EM induction system indirect current, two adjacent yoke ends, magnetic field is always
Moved from previous yoke end to latter yoke end, and moving direction is perpendicular to the space between them.Therefore in magnetic
Plane where yoke end face wants that the direction of electromagnetic force is also angled when having certain angle for the yoke back of the body.Electromagnetic force can
Horizontal peripheral force and vertical axial force are decomposed into, comprehensive is spiral force, can realize auger.But magnetic field is adjacent
Two yoke ends between space when vertically moving, the face of side is less than perpendicular to the effective area of yoke end sides
Product, and the number of yoke end arranged cells is limited, axial force is much smaller than peripheral force.This two classes method can not all be realized effectively
Auger.
The content of the invention
For above-mentioned the deficiencies in the prior art, the invention provides a kind of compact conformation, control is flexible, and performance is stable to answer
Box-like spiral magnetic stirrer, can drive metal bath to be spinned motion, realize the pressure uniform stirring to metal bath.
Technical scheme is as follows：
A kind of complex and spiral magnetic stirrer, EM induction system is made up of yoke group and the coil being enclosed on thereon, magnetic
Yoke group is compounded to form by rotating excitation field yoke group and travelling-magnetic-field yoke group；The rotating excitation field yoke group and travelling-magnetic-field yoke
Group is constituted by the yoke back of the body and several yoke ends；The rotating excitation field yoke back of the body is thin wall cylinder-shaped, and the travelling-magnetic-field yoke back of the body is
Plate shape；Travelling-magnetic-field yoke carries on the back the gap for having 1-100mm between the rotating excitation field yoke back of the body.
Rotating excitation field yoke end one has 4 or 6, is arranged horizontally in rotating excitation field yoke back；Travelling-magnetic-field magnetic
Yoke end one has 6,8,12,16,18 or 24, the travelling-magnetic-field yoke back of the body one has 2,4 or 6, symmetrical or be evenly distributed on
The periphery of strand, and vertical placement；Travelling-magnetic-field yoke end is arranged vertically at travelling-magnetic-field yoke back, each travelling-magnetic-field
Yoke back has 3 or 4 travelling-magnetic-field yoke ends；The yoke end in two kinds of magnetic fields is evenly distributed on strand periphery, magnetic pole
Polar surface is directed to strand center.
Coil uses wire or hollow copper pipe, such as uses hollow copper pipe, can be passed through cooling water inside it, can with overlapping winding,
Concentratred winding arrangement is wrapped in the space between yoke.
Power supply is supplied using two-phase or three-phase alternating-current supply；Using a set of or two sets of power supplys.
The angle of the center line of rotating excitation field yoke end and travelling-magnetic-field yoke end position is 35-75 ゜, is owned
The angle of the normal of plane is 30-75 ゜ where yoke end face.
Travelling-magnetic-field yoke back of the body intersection is evenly distributed between rotating excitation field yoke end, and two class yoke groups can be with alternate row
Cloth.
During using a set of power supply, coil is connected between two kinds of yokes；During using two sets of power supplys, control electric current can be distinguished strong
Degree；In the case where not influenceing the size of peripheral force, the purposive size for increaseing or decreasing axial force of energy；And by exchanging in power supply
The position of two-phase can change the direction of electromagnetic force, controllable four kinds of auger modes can be realized, be respectively：It is left
Upper, lower-left, upper right and bottom right.
The operation principle of the present invention is as follows：
Coil current uses six grades of mode imposed loads of two-phase quadrupole or three-phase, and the magnetic field that alternating current is produced passes through two kinds
Yoke enters in metal bath.Under magnetic fields, induced-current is produced inside metal bath；Induced-current and magnetic field are mutual
Effect produces electric rotating magnetic force and linear electromagnetic power respectively, and two power are compounded to form auger power, and the power drives metal bath
Spin motion.
The invention provides a kind of complex and spiral magnetic stirrer, it significantly has the beneficial effect that：
1. compact conformation, control is flexible, and performance is stable, and metal bath can be driven to spin motion, realize and metal is melted
The pressure uniform stirring of body.
2. the mode of connection is simple, identical with rotary EMS device, and the selectivity of power supply is more flexible.Can with a set of or
Two sets of power supplys of person, it is specifically chosen as the case may be.When using two sets of power supplys, under the effect for not influenceing peripheral force to act on,
The size for increaseing or decreasing axial force that can be purposive or the direction for changing axial force.Needing vertical direction larger
During power, the benefit of the device is more obvious.
3. relative to same device, the present invention has broken same device with a set of power supply or can not control axial force respectively
With the limitation of peripheral force, the present invention can produce bigger axial force, and the controllability of spiral electromagnetic force is stronger.
4. having a wide range of application, available for the electromagnetic agitation of conticaster crystallizer, two cold-zones or solidification end, it is also suitable simultaneously
In molding, semi-solid casting etc.., can be with even solidification shell thickness, by changing the size of peripheral force and axial force respectively
Even solute Distribution, suppresses the liquid fluctuating of metal bath in crystallizer, can reduce the thermograde at strand center and edge, subtract
Flow slowly stock impact depth and promotion inclusion floating, reduces center segregation, promotes formation etc. of equiax crystal.
5. relative to the spiral electromagnetic mixing apparatus of superposing type inside and outside tradition, the present invention can provide bigger peripheral force.
Brief description of the drawings
Fig. 1 is 4-2 × 4 (4 rotating excitation field yoke ends；2 × 4 travelling-magnetic-field yoke end symmetrics are distributed strand two
Side) complex and spiral magnetic stirrer and strand structural representation；
Fig. 2 is the top view of 4-2 × 4 complex and spiral magnetic stirrer structures；
Fig. 3 is the oblique view of 4-2 × 4 complex and spiral magnetic stirrer structures；
Fig. 4 is the cross section view of 4-2 × 4 complex and spiral magnetic stirrer structures；
Fig. 5 is 4-2 × 3 (4 rotating excitation field yoke ends；2 × 3 travelling-magnetic-field yoke end symmetrics are distributed strand two
Side, the rest may be inferred below) top view of complex and spiral magnetic stirrer structure；
Fig. 6 is the oblique view of 4-2 × 3 complex and spiral magnetic stirrer structures；
Fig. 7 is the top view of 4-4 × 4 complex and spiral magnetic stirrer structures；
Fig. 8 is the oblique view of 4-4 × 4 complex and spiral magnetic stirrer structures；
Fig. 9 is the top view of 4-4 × 3 complex and spiral magnetic stirrer structures；
Figure 10 is the oblique view of 4-4 × 3 complex and spiral magnetic stirrer structures；
Figure 11 is the top view of 6-2 × 4 complex and spiral magnetic stirrer structures；
Figure 12 is the oblique view of 6-2 × 4 complex and spiral magnetic stirrer structures；
Figure 13 is the top view of 6-2 × 3 complex and spiral magnetic stirrer structures；
Figure 14 is the oblique view of 6-2 × 3 complex and spiral magnetic stirrer structures；
Figure 15 is the top view of 6-6 × 4 complex and spiral magnetic stirrer structures；
Figure 16 is the oblique view of 6-6 × 4 complex and spiral magnetic stirrer structures；
Figure 17 is the top view of 6-6 × 3 complex and spiral magnetic stirrer structures；
Figure 18 is the oblique view of 6-6 × 3 complex and spiral magnetic stirrer structures；
Figure 19 is strand Z=0 cross sections flow field polar plot under rotary EMS；
Figure 20 is strand X=0 longitudinal sections streamline polar plot under rotary EMS；
Figure 21 is using the lower strand Z=0 cross sections flow field polar plot of the complex and spiral magnetic stirrer of 4-2 × 4 effect；
Figure 22 is using the lower strand X=0 longitudinal sections flow field polar plot of the complex and spiral magnetic stirrer of 4-2 × 4 effect；
(mixing power of vertical direction is one on the other)；
Figure 23 is using the lower strand X=0 longitudinal sections flow field polar plot of the complex and spiral magnetic stirrer of 4-2 × 4 effect；
(mixing power of vertical direction is ibid)；
Figure 24 is using the lower strand X=0 longitudinal sections flow field polar plot of the complex and spiral magnetic stirrer of 4-2 × 4 effect；
(mixing power of vertical direction is with)；
Figure 25 is using three-dimensional motion pattern in the lower strand of the complex and spiral magnetic stirrer of 4-2 × 4 effect；
Figure 26 is applies strand longitudinal section last axial velocity comparison diagram of line to down going wave power and when not applying in the same direction；
Figure 27 is the comparison diagram of the power using horizontal direction during a set of and two sets of power supplys, on vertical direction.
Wherein, 1：Strand；2：Spiral magnetic stirrer；3：Rotating excitation field yoke end；4：Coil；5：Rotating excitation field yoke
The back of the body；6：Travelling-magnetic-field yoke is carried on the back；7：Travelling-magnetic-field yoke end.
Embodiment
The embodiment to the present invention is further illustrated below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of complex and spiral magnetic stirrer is arranged on the periphery of strand.In figure, 1 is strand, and 2 be one
Plant complex and spiral magnetic stirrer.As shown in Fig. 2-18, a kind of complex and spiral magnetic stirrer, including coil, yoke group.
It is characterized in that yoke group is compounded to form by two sets of different independent yoke groups.Described yoke is by the yoke back of the body and several magnetic
Yoke end is constituted.A kind of described yoke back of the body is thin wall cylinder-shaped, and its yoke end horizontal is distributed in yoke back；The yoke end
Totally 4 or 6, portion, the diagonal angle at the center of their positions is 30-70 ゜.The described another yoke back of the body is tabular, should
The yoke back of the body totally 2,4 or 6, periphery that is vertical to place and symmetrical or being evenly distributed on strand；Its yoke end is distributed in magnetic vertically
In back of the yoke, 3 or 4 are often classified as.Two kinds of yoke ends are uniformly arranged on the periphery of strand, and two kinds of yoke ends position
Centerlines are 35-75 ゜.The coil uniform winding is in two kinds of yokes, and the polar surface of magnetic pole is directed to strand center.
There is 1-100mm gap between described two kinds of yokes back of the body, on the one hand shorten the distance between two kinds of yokes, reduce outer layer equipment
Electromagnetic force with range attenuation degree；On the other hand the transmission of the magnetic line of force is not influenceed.The core concept of the present invention is travelling-magnetic-field
Yoke back of the body intersection is evenly distributed between rotating excitation field yoke end, and two class yoke groups can be with interphase distribution.
Power supply mode is supplied using two-phase or three-phase alternating current, and power frequency is 0-100Hz.It is characterized in that two kinds of yokes
A set of power supply can be shared, two sets of power supplys can also be supplied.During using a set of power supply, coil is connected between two kinds of yokes.Make
During with two sets of power supplys, control electric current intensity can be distinguished；In the case where not influenceing the size of peripheral force, purposive it can increased or decrease
The size of axial force.And the direction of electromagnetic force can be changed by the position for exchanging the two-phase in power supply, it can realize controllable
Four kinds of auger modes, be respectively：Upper left, lower-left, upper right and bottom right.
The travelling-magnetic-field yoke back of the body, which intersects, to be evenly distributed between the space of rotating excitation field yoke end, and two kinds of yokes carry on the back it
Between have space.Wherein rotating excitation field yoke end horizontal is arranged in its yoke back, and travelling-magnetic-field yoke end is distributed in vertically
Its yoke back.There are 4 or 6 two kinds of arrangement forms rotating excitation field yoke end, and the travelling-magnetic-field yoke back of the body has 2,4 or 6 three kinds
There are 3 or 4 two kinds of placement forms distribution form, travelling-magnetic-field yoke end.The spiral magnetic stirrer being compounded to form has 8 kinds
Structure.Hereinafter, illustrated with the complex and spiral magnetic stirrer of 4-2 × 4.
Embodiment 1
As shown in Figure 1, 2, strand 1 uses cross dimensions for 450mm × 370mm bloom.Complex and spiral electromagnetism is stirred
The yoke group for mixing device is compounded to form by two kinds of different independent yokes.They are rotating excitation field yoke, travelling-magnetic-field magnetic respectively
Yoke.Yoke group is good by magnetic conductivity, and coercivity is low, and the low orientation silicon steel of magnetic loss is made.
As shown in Figure 3,4, the rotating excitation field yoke back of the body 5 is thin wall cylinder-shaped, and internal diameter is 1280mm, and external diameter is 1360mm, high
440mm.The cube that the travelling-magnetic-field yoke back of the body 6 is 440mm × 360mm × 15mm, is symmetrically distributed in the two of strand 1 by totally 2
Side.Rotating excitation field yoke end 3 totally 4, its yoke end face size is 440mm × 360mm rectangle；The yoke end horizontal cloth
Put in its yoke back, and the diagonal angle at the center of their positions is 60 ゜.Travelling-magnetic-field yoke end 7 totally 8,
Its yoke back is arranged vertically on, per side 4.Two kinds of yoke ends are evenly distributed on the periphery of strand 1, and two kinds of yoke end institutes
The angle at center of position be 60 ゜, the polar surface of yoke is directed to the center of strand 1.The coil 4 using copper conductor or in
Empty copper pipe coiling is formed, and cooling water can be passed through inside hollow copper pipe, copper pipe by such as using, and be existed with concentratred winding mode uniform winding
In two kinds of yokes, coil turn is fixed as 100 circles.There is 25mm gap between two kinds of yoke back ofs the body.After the indirect current stream of coil 4,
Rotating excitation field and travelling-magnetic-field can be produced, helical magnetic field is compounded to form.
In this example, power supply is supplied using a set of two-phase alternating current, the ゜ of carrier phase shift 90 between every phase winding；Supply frequency is
3Hz, size of current is 400A, using two-phase quadrupole mode imposed load.
The strand Z=0 cross-section Flow Field Distribution situations under travelling-magnetic-field yoke effect are not added with, as shown in figure 19.Metal
Melt rotates in cross-section, after indirect current, and induced field produces electromagnetic force with induced-current interaction, should
Power drives metal bath to rotate.
Streamline distributions at the strand X=0 longitudinal sections under travelling-magnetic-field yoke effect are not added with, as shown in figure 20：Metal
Four circulation movements symmetrical above and below are presented in melt on longitudinal section, and this is the effect of Secondary Flow under rotary EMS.
Embodiment 2
The imposed load mode and size of this example and embodiment 1, it is identical using power mode, the difference is that adding traveling wave
Magnetic field yoke, and ensure that vertical mixing direction is incorgruous.The lower strand Z=0 of the complex and spiral magnetic stirrer of 4-2 × 4 effect is vertical
Streamline distributions at section, as shown in figure 21：Metal bath rotates in cross-section, after indirect current, sensing
Magnetic field produces spiral electromagnetic force with induced-current interaction, and spiral electromagnetic force is decomposed into the power in horizontally and vertically direction, level
Power drives metal bath to rotate.
As shown in figure 22, metal bath presented on longitudinal section above and below four circulation movements, wherein respectively have up and down one compared with
Strong circulation flowing plays a leading role, and the flow strength is stronger relative to the circulation that rotary EMS acts on lower longitudinal section.It is different
To vertical mixing power drive metal bath to do large-scale circulation in longitudinal section.This is conducive to heat transfer and biography on axial direction
Matter.
Embodiment 3
This example is relative to embodiment 2, it is ensured that vertical mixing direction is ibid.As shown in figure 23, metal bath is equally cut vertical
Four circulation flowings above and below being presented on face, but relative to the flowing of strand bottom, the flow strength on top is powerful.This is due to same
To mixing power straight up strengthen the flowing of strand upper metal melt, metal bath rises along wall, reaches top
Flowed downward afterwards along strand center.
Embodiment 4
This example is relative to embodiment 3, it is ensured that vertical mixing direction is with.As shown in figure 24, metal bath is on longitudinal section
The type of flow with example 3 on the contrary, the mobile phase of strand bottom is larger for the flow strength on top.This is due in the same direction
Mixing power straight down strengthen the flowing of strand lower metal melt.The metal bath on strand top rises along wall,
Due to the effect of liquid continuity and pressure differential, metal bath flows downward at top along strand center, causes liquid level to recessed
Fall into.As shown in figure 26, apply after mixing power straight down in the same direction, downward power drives part metals melt downward along wall
Motion, is then backed up along strand center, upward backflow and the melt collision that partly flows downward, and slows down liquid surface hollow journey
Degree, can suppress liquid fluctuating.
Embodiment 5
As shown in figure 25, using under the effect of the complex and spiral magnetic stirrer of 4-2 × 4, metal bath is done inside strand
Screw.
Embodiment 6
This example is identical with the structure that embodiment 2 is used, the difference is that using two sets of two-phase power supplies supplies.Phase between per phase winding
The ゜ of bearing difference 90；Supply frequency is 3Hz, using two-phase quadrupole mode imposed load, is wrapped in the line in rotating excitation field yoke group
Size of current is passed through in circle for 400A, size of current is passed through in the coil being wrapped in travelling-magnetic-field yoke group for 500A.
When as shown in figure 27, using two sets of power supplys, electric current is constant in the coil in holding rotating excitation field yoke group, adds
The electric current in coil in travelling-magnetic-field yoke group, it is found that the power of horizontal direction does not change substantially, the power of vertical direction is obvious
Increase, this explanation, can be with the size of purposive increase axial force during using two sets of power supplys.
Therefore, it is more suitable using two sets of power supplys when needing the larger situation of axial force；Prove simultaneously, contrast is used
The such device of a set of power supply, the present invention possesses the advantage that can provide larger axial force.And can make as the case may be
Corresponding selection；Add the flexibility used.When carrying out electromagnetic agitation, it can be changed by the position for exchanging two-phase in two-phase power supply
Become the direction of horizontally and vertically electromagnetic force, so as to realize controllable spiral electromagnetic agitation.
The complex and spiral magnetic stirrer that the present invention is provided has a wide range of application, and can be applied to metal continuous cast, semi-solid casting
Make and directional solidification field.Wherein during metal continuous cast, the electromagnetism available for crystallizer, two cold-zones and solidification end is stirred
Mix.Compact conformation of the present invention, control is flexible, and performance is stable, the traditional such device of contrast, and can provide larger peripheral force, with
For required.
For the strand that cross dimensions is larger, because solidification shrinkage amount is larger in process of setting, easily there is center porosity,
Central pipe, the quality problems such as center segregation, at this time, it may be necessary to provide pressure uniform stirring interior in a big way to improve strand matter
Amount problem.The present apparatus can not only provide the larger mixing power of horizontal direction, moreover it is possible to provide mixing power larger in vertical direction, because
This present apparatus has the usability of greater room.
During using a set of power supply, simple raising current strength and frequency, both horizontally and vertically on electromagnetic force all can
Increase, the mixing effect that may be needed with some situations is not consistent.The present apparatus can provide controllable axial force, therefore for
Suppressing the research direction of liquid fluctuating also has advantage.
Above-described instantiation, is only that technical scheme, embodiment is described to the purpose of the present invention, and
Non- to limit the invention, therefore, various modifications or modification that those skilled in the art makes to the present invention are all fallen within
In the range of the claim of the present invention.
Claims (4)
1. a kind of complex and spiral magnetic stirrer, it is characterised in that：EM induction system is by yoke group and is enclosed on line thereon
Circle composition, yoke group is compounded to form by rotating excitation field yoke group and travelling-magnetic-field yoke group；The rotating excitation field yoke group and row
Ripple magnetic field yoke group is constituted by the yoke back of the body and several yoke ends；The rotating excitation field yoke back of the body is thin wall cylinder-shaped, traveling wave magnetic
The field yoke back of the body is plate shape；Travelling-magnetic-field yoke carries on the back the gap for having 1-100mm between the rotating excitation field yoke back of the body；
Rotating excitation field yoke end one has 4 or 6, is arranged horizontally in rotating excitation field yoke back；Travelling-magnetic-field yoke end
Portion one has 6,8,12,16,18 or 24, the travelling-magnetic-field yoke back of the body one has 2,4 or 6, symmetrical or be evenly distributed on strand
Periphery, and vertical place；Travelling-magnetic-field yoke end is arranged vertically at travelling-magnetic-field yoke back, each travelling-magnetic-field yoke
Back has 3 or 4 travelling-magnetic-field yoke ends；The yoke end in two kinds of magnetic fields is evenly distributed on strand periphery, the polarity of magnetic pole
Face is directed to strand center；
Coil uses wire or hollow copper pipe, such as uses hollow copper pipe, can be passed through cooling water inside it, can be with overlapping winding, concentration
Winding arrangement is wrapped in the space between yoke；
Power supply is supplied using two-phase or three-phase alternating-current supply；Using a set of or two sets of power supplys.
2. complex and spiral magnetic stirrer according to claim 1, it is characterised in that：Rotating excitation field yoke end and row
The angle of the center line of ripple magnetic field yoke end position is 35-75 ゜, the angle of the normal of plane where all yoke end faces
For 30-75 ゜.
3. complex and spiral magnetic stirrer according to claim 1, it is characterised in that：The travelling-magnetic-field yoke back of the body intersects equal
It is distributed in evenly between rotating excitation field yoke end, two class yoke groups can be with interphase distribution.
4. complex and spiral magnetic stirrer according to claim 1, it is characterised in that：During using a set of power supply, coil
It is connected between two kinds of yokes；During using two sets of power supplys, control electric current intensity can be distinguished；In the case where not influenceing the size of peripheral force,
The purposive size for increaseing or decreasing axial force of energy；And electromagnetic force can be changed by the position for exchanging the two-phase in power supply
Direction, controllable four kinds of auger modes can be realized, be respectively：Upper left, lower-left, upper right and bottom right.
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| CN201710339491.6A CN107116191B (en) | 2017-05-15 | 2017-05-15 | Combined type spiral electromagnetic stirrer |
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|---|---|---|---|
| CN201710339491.6A CN107116191B (en) | 2017-05-15 | 2017-05-15 | Combined type spiral electromagnetic stirrer |
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| CN107116191B CN107116191B (en) | 2020-09-29 |
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| CN111085674A (en) * | 2019-12-25 | 2020-05-01 | 东北大学 | Carbon fiber reinforced metal matrix composite material capable of being extended cooperatively and preparation device and method |
| CN111085674B (en) * | 2019-12-25 | 2021-09-03 | 东北大学 | Carbon fiber reinforced metal matrix composite material capable of being extended cooperatively and preparation device and method |
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