CN109351929A - A kind of solenoid type magnetic stirrer - Google Patents
A kind of solenoid type magnetic stirrer Download PDFInfo
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- CN109351929A CN109351929A CN201811553501.7A CN201811553501A CN109351929A CN 109351929 A CN109351929 A CN 109351929A CN 201811553501 A CN201811553501 A CN 201811553501A CN 109351929 A CN109351929 A CN 109351929A
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- solenoid coil
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- electromagnetic force
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 136
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- 238000003756 stirring Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
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- 239000007787 solid Substances 0.000 claims description 20
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
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- 238000010586 diagram Methods 0.000 description 5
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
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- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D27/00—Stirring devices for molten material
Abstract
The invention discloses a kind of solenoid type magnetic stirrers, comprising: shell, solenoid coil, crucible, Resistant heating unit and heat insulation layer；Coil support wall is provided in shell, solenoid coil is wrapped on coil support wall, and solenoid coil can provide radial and axial electromagnetic force after being powered for metal bath；Resistant heating unit is used to heat and keep the molten condition of metal for crucible；Heat insulation layer protects solenoid coil for completely cutting off high temperature.In the present invention, different number, position solenoid coil can produce different radial and axial distribution of electromagnetic force, wherein, typical force distribution is the axially distributed unevenness of radial electromagnetic force, metal bath is set to generate the turbulent motion of " double loop " track, the more traditional electromagnetic agitation of turbulence greatly improves, and increases the randomness of bath movement, therefore the more traditional magnetic stirrer of stirring efficiency of solenoid type magnetic stirrer obtains larger raising.
Description
Technical field
The invention belongs to electromagnetic casting fields, more particularly, to a kind of solenoid type magnetic stirrer.
Background technique
With science and technology and manufacturing fast development, single metal material is difficult to meet industrial design requirement, because
This exploitation has the composite material of multiple material excellent properties into one of current research hotspot.Wherein, grain reinforced metal
The features such as based composites prepare simple, superior performance by it, cost is relatively low, obtains in every field such as Aeronautics and Astronautics, automobiles
To being widely applied.Mechanical mixing method is stirred the metal bath that enhancing particle is added by rotation oar, makes enhancing
Grain is sufficiently mixed with metal bath, is that prepare particles reiforced metal-base composition be current most mature method, but machinery stirs
Mix there is also easily bringing into impurity, mixing power are uneven, the defects of stringent required agitating paddle material high temperature resistant, and electromagnetic agitating technology
It with blind area non-contact, without mixing, is not easy to bring the advantages such as impurity, improvement metal microstructure into, particulate reinforced metal-based multiple
Condensation material casting field has great application prospect.Currently, there are mainly three types of different stirring shapes for traditional electromagnetic agitating technology
Formula: (1) revolving-field type, metal bath are rotated under the action of rotating excitation field by circumferential electromagnetic force；(2) travelling-magnetic-field formula,
Metal bath is moved in a straight line under the action of travelling-magnetic-field by the constant electromagnetic force in direction；(3) helical magnetic field formula rotates
Magnetic field is superimposed with travelling-magnetic-field, metal bath under the action of helical magnetic field simultaneously spinned by peripheral force and axial force on
Liter or descending motion.The patent of invention of publication number CN107116191A and CN103182495A point out complex and spiral electromagnetism respectively
Blender can produce above-mentioned three kinds of different agitating modes under different working modes.But traditional electromagnetic agitation still has following
Defect: (1) mixing efficiency is not high, stirs electromagnetic force and makes metal bath movement disorder degree smaller without radial component, is unfavorable for gold
Belong to the mixing of melt internal heat transfer and metal bath and enhancing particle；(2) pact of the mixing speed by electromagnetic force skin effect
Beam accelerates metal bath flow velocity and needs to improve operating current frequency, and the raising of frequency is so that electromagnetic force suffered by melt is mainly divided
Cloth is in melt close to winding area, and central area is hardly by electromagnetic force；(3) rotating in a circumferential direction for metal bath is formed in liquid level
Center Maelstrom easily makes particle that agglomeration occur, reduces composite material in particles reiforced metal-base composition casting
Performance；(4) magnetic stirrer winding is more, and structure is complicated, not easy to repair.
Summary of the invention
In view of the drawbacks of the prior art, the purpose of the present invention is to provide a kind of solenoid type magnetic stirrers, it is intended to solve
Certainly the prior art particles reiforced metal-base composition casting in due to whipped form is single, metal bath movement disorder degree compared with
Small the technical issues of leading to metal bath and enhancing poor Particle Mixing Result, inefficiency.
The present invention provides a kind of solenoid type magnetic stirrers, comprising: shell, solenoid coil, crucible, resistance wire add
Hot cell and heat insulation layer；Coil support wall is provided in the shell, the solenoid coil is wrapped in the coil support wall
On, the solenoid coil can provide radial and axial electromagnetic force after being powered；The Resistant heating unit is used to be the earthenware
Crucible heats and keeps the molten condition of metal；The heat insulation layer protects the solenoid coil for completely cutting off high temperature.
Wherein, when work, the magnetic field that the solenoid coil generates at its height center is greater than the magnetic field at both ends, metal
Electromagnetic force suffered by the middle part of melt is greater than electromagnetic force suffered by both ends, and the movement tendency that metal bath inwardly flows generation is entire molten
Body forms middle part inward flow, and " double loop " flow trace that both ends are flowed outward is this similar to churned mechanically " double
Circuit " turbulent motion can efficiently be stirred entire melt.
As an embodiment of the present invention, when solenoid coil is single coil, it is wrapped in the coil support
On wall；The magnetic field that the solenoid coil generates is smaller at thiol maximum both ends, and molten metal is in synchronization in crucible
The electromagnetic force being subject to also is in the big characteristic distributions small in ends in middle part.
As an embodiment of the present invention, when solenoid coil is single coil, it is arranged on the outside of metal bath
Lower end, when work, the electromagnetic force that metal bath lower end is subject to is larger, and the electromagnetic force that upper end is subject to is smaller, lower end metal bath
It flows radially inward and upper end metal bath flows outward, metal bath forms the circulation loop of an entirety, liquid form
For turbulent flow.
As an embodiment of the present invention, when solenoid coil is single coil, it is arranged on the outside of metal bath
Upper end, when work, the electromagnetic force that metal bath upper end is subject to is larger, and the electromagnetic force that lower end is subject to is smaller, upper end metal bath
Inwardly flowing and lower end metal bath flows outward, metal bath formed an entirety circulation loop, liquid form is turbulent flow.
As another embodiment of the invention, when solenoid coil is two coils, two coils are separately positioned on
Top and bottom on the outside of metal bath, and the height center about crucible is symmetrical.
As another embodiment of the invention, when solenoid coil is two coils, two coils are separately positioned on
Top and bottom on the outside of metal bath, and the height center asymmetric distribution about crucible.
Wherein, the solenoid coil is that solid copper conductor or hollow copper tubing can be led to when using hollow copper tubing in pipe
Water further increases the heat dissipation performance of coil.
In embodiments of the present invention, solenoid type magnetic stirrer further include: frequency converter and power supply, the one of the frequency converter
End connects the solenoid coil, and the other end of the frequency converter connects the power supply, and the frequency converter can be between 0~100Hz
Arbitrarily change the alive frequency of the solenoid coil institute, the power supply can arbitrarily change the solenoid between 0~400A
The alive virtual value size of coil institute.
In embodiments of the present invention, Resistant heating unit includes: resistance wire, thermocouple and temperature regulation circuit；It is described
Resistance wire is used for heating crucible, and the thermocouple is described for detecting crucible temperature and by temperature feedback to temperature regulation circuit
Temperature regulation circuit is maintained at crucible temperature in user's set temperature according to thermocouple feedback.
The present invention has the following technical effect that
(1) stirring efficiency is high.Since solenoid coil generates radial and axial electromagnetic force, and radial electromagnetic force is along axial point
Cloth is uneven, causes metal bath to form similar churned mechanically flow circuits, forms of motion is turbulent flow, the more traditional electromagnetism of turbulence
Stirring greatly improves, and increases the randomness of metal bath movement, therefore the stirring efficiency of solenoid type magnetic stirrer relatively passes
System magnetic stirrer obtains larger raising, while also having both blind area non-contact, without mixing, being not easy to bring into that impurity, to improve metal micro-
The advantages of seeing the tradition electromagnetic agitation such as structure.
(2) control is simple and whipped form is diversified.It only needs to change solenoidal position and combination can produce different points
The electromagnetic force of cloth feature, therefore can be fixed according to the metal bath to be mixed of different physical characteristics or the metal bath of the particle containing enhancing
Different whipped forms is made, metal continuous cast, a variety of fields such as particles reiforced metal-base composition casting, semi-solid casting are suitable for
Scape.
(3) limitation of the raising of power frequency to mixing effect is reduced.When power frequency improves, electromagnetic force increases, but
Due to skin effect, electromagnetic force is mainly distributed on the outside of metal bath, and the electromagnetic stirring force that inside is subject to is smaller, and solenoid type
Magnetic stirrer is applied to the electromagnetic force of metal bath based on radial force, and metal bath will generate radial velocity, and on the outside
It is circulated between inside, reduces mixing power minor impact inside metal bath.
(4) metal bath liquid level non-stop layer whirlpool is formed in whipping process, therefore in particles reiforced metal-base composition
In casting, it not will lead to enhancing particle and reunite in nearly meniscus region.
(5) primary structure of field generator for magnetic is solenoid coil, and structure is simple, and size is small, and performance is stablized, the service life
It is long.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of solenoid type magnetic stirrer provided in an embodiment of the present invention；
Fig. 2 is the magnetic induction line schematic diagram in the magnetic field that solenoid coil generates；
Fig. 3 (a) be metal bath in magnetic field, induction field, induced current and electromagnetic force phase relation schematic diagram；
Fig. 3 (b) is the typical field of force of solenoid type magnetic stirrer, flow field schematic diagram；
Fig. 4 (a) is the sectional view in the unicoil mode stirring Fluid field of solenoid type magnetic stirrer；
Fig. 4 (b) is to stir the sectional view of Fluid field in tradition machinery blender；
Fig. 5 is the structure chart and flow field sectional view of first embodiment of the invention；
Fig. 6 is the structure chart and flow field sectional view of second embodiment of the invention；
Fig. 7 is the structure chart and flow field sectional view of third embodiment of the invention；
Fig. 8 is the structure chart and flow field sectional view of fourth embodiment of the invention；
Fig. 9 is the structure chart and flow field sectional view of fifth embodiment of the invention.
In figure, 1 is shell, and 2 be case top lid, and 3 be solenoid coil, and 4 be crucible, and 5 be resistive heater, and 6 be insulation
Layer, 7 be metal bath (molten metal).
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention be applied to electromagnetic casting and material electromagnetic processing field, particular for metal continuous cast, semi-solid casting and
Magnetic stirrer used in particles reiforced metal-base composition casting.The present invention provides a kind of structure is simple, work the longevity
Life length, whipped form multiplicity, the high solenoid type blender of stirring efficiency can drive metal bath to do turbulent motion, realization pair
Metal bath stirs or quickly and evenly mixes metal bath with solid particle.
Solenoid type blender provided by the invention includes: that shell, case top lid, solenoid coil, crucible, resistance wire add
Hot cell and heat insulation layer；Shell plays support, isolation and protection；Case top lid plays isolation protective effect；The solenoid
Coil winding is inside housings on coil support wall；The crucible is surround by resistance wire, is used as container；The resistance wire adds
Hot cell is the molten condition that crucible heats and keeps metal；The heat insulation layer is located on the outside of resistance wire, and effect is protection spiral shell
Spool coil completely cuts off resistance wire high temperature.
In embodiments of the present invention, solenoid coil has single and two kinds of forms of multiple combinations.Single solenoid coil can
It is stronger to generate thiol, the weaker electromagnetic force in both ends is suitable for metal continuous cast；Multiple toroidal windings can have different number,
Position is combined to generate the electromagnetic stirring force of different distributions, and combining form can be according to different usage scenarios, different physical characteristics
Metallic matrix and enhancing particle change.
In embodiments of the present invention, solenoid coil connection frequency converter and power supply, power supply provide electricity for frequency converter and coil
Can, and can arbitrarily change the alive virtual value size of solenoid coil between 0~400A, frequency converter can be in 0~100Hz
Between arbitrarily change the alive frequency of coil institute and keep current amplitude constant according to electromagnetic induction principle, frequency is higher, generates
Electromagnetic stirring force it is bigger, due to skin effect, the region of electromagnetic force is also smaller, although solenoid provided by the invention
Formula magnetic stirrer can provide radial electromagnetic force to reduce limitation of the power frequency raising to mixing effect, but be not enough to support completely
Disappearing, the metal bath and enhancing particle without same physical characteristic correspond to different optimal current frequency and size in stirring,
Frequency converter and power supply enable the present invention to be optimal on power frequency and size in different usage scenarios.
Solenoid coil form is not limited to solid copper conductor, and the mode that hollow copper tubing water flowing can be used further increases it and dissipates
Thermal energy power.
In embodiments of the present invention, Resistant heating unit is made of resistance wire, thermocouple and temperature regulation circuit.Resistance
Silk is used for heating crucible, and thermocouple is for detecting crucible temperature and by temperature feedback to temperature regulation circuit, temperature regulation circuit
Can be fed back according to thermocouple is maintained at crucible temperature in user's set temperature.
In the present invention, energization solenoid coil generates alternating magnetic field B, as shown in Fig. 2, the magnetic field is by radial component and axial direction
Component composition, which inspires induction field E in metal bath, according to the law of electromagnetic induction it is found that the phase of induction field E
Alternating magnetic field after steric retardationSince metal bath is inductive load, the phase of the induced current density J in melt be will be late by
Induction fieldAccording to Ampere force formula, electromagnetic force suffered by unit volume metal bathBy
There is radial and axial component in magnetic field, therefore metal bath is by electromagnetic force axially and radially.Axial electromagnetic force can accelerate gold
Belong to the movement of melt in the axial direction, improves the speed and turbulence of bath movement.For radial electromagnetic force, due to current density
The influence of lagging phase α leads to action time of the metal bath in a power cycles by electromagnetic force radially inward
And numerical value is all larger than electromagnetic force radially (i.e. in Fig. 3 (a)), therefore metal bath generate to
The movement tendency of interior flowing, with the increase of working time, the flow velocity of metal bath constantly enhances, until the resistance of motion and electromagnetism
Power reaches dynamic equilibrium.
Because the magnetic field that solenoid coil generates at its height center is greater than the magnetic field at both ends, metal bath middle part
Suffered electromagnetic force is greater than electromagnetic force suffered by both ends, is become according to above-mentioned analysis known metal melt by the movement inwardly flowed is generated
Gesture, due to the metal bath conservation of mass, final melt will form middle part inwardly flowing, " double loop " flowing that both ends are flowed outward
Track, it is this that efficiently entire melt can be stirred similar to churned mechanically " double loop " turbulent motion.Therefore, originally
The solenoid type magnetic stirrer that invention provides has both the advantages of mechanical agitator and traditional magnetic stirrer.
For further description solenoid type magnetic stirrer provided in an embodiment of the present invention, referring now to attached drawing and tie
Closing specific example, details are as follows:
First embodiment:
As shown in Figure 1, solenoid type blender provided by the invention include: shell 1, case top lid 2, solenoid coil 3,
Crucible 4, Resistant heating unit 5 and heat insulation layer 6；Shell 1 plays support, isolation and protective effect；Case top lid 2 plays isolation protection
Effect；Solenoid coil 3 is wrapped on 1 Inside coil supporting walls of shell, and height is more smaller than crucible 4；Crucible 4 is by resistance wire ring
Around as stirring container；Resistant heating unit 5 forms (thermocouple and temperature by resistance wire, thermocouple and temperature regulation circuit
Adjust and be not drawn into circuit diagram), resistance wire is used for heating crucible and keeps the molten condition of metal, and thermocouple is for detecting crucible
Temperature and by temperature feedback to temperature regulation circuit, temperature regulation circuit can be fed back according to thermocouple make crucible temperature be maintained at use
In the set temperature of family；Heat insulation layer 6 is located on the outside of resistance wire, and effect is protection solenoid coil, completely cuts off resistance wire high temperature, works as gold
Aerosil can be used as insulation layer material in category melting temperature when lower, sky can be used when metal melting temperature is higher
Heart layers of copper is insulated by way of water cooling.
As shown in figure 5, blender coil is made of single solenoid coil 3.Since the magnetic field that solenoid coil 3 generates exists
Thiol is maximum, and both ends are smaller, therefore the big both ends in the middle part of the electromagnetic force that synchronization is subject to also is in of molten metal 7 in crucible
Small distribution.As shown in Fig. 2, coil 3 generates alternating magnetic field B, and the magnetic field is by diameter in a power cycles of solenoid coil 3
Formed to component and axial component, which inspires induction field E in metal bath 7, according to the law of electromagnetic induction it is found that
The delayed phase alternating magnetic field of induction field ESince metal bath 7 is inductive load, the induced current density J's in melt
Phase will be late by induction fieldAccording to Ampere force formula, electromagnetic force suffered by unit volume metal bathSince there is radial and axial component in magnetic field, metal bath is by electromagnetic force axially and radially.Axial magnetic
Power can accelerate the movement of metal bath in the axial direction, improve the speed and turbulence of bath movement.For radial electromagnetic force, electric current
When the lagging phase α of density will lead to effect of the metal bath 7 in a power cycles by electromagnetic force radially inward
Between and numerical value be all larger than electromagnetic force radially, as shown in Fig. 3 (a),(to be radially outward positive
Direction), and because 3 middle part of solenoid coil big characteristics of magnetic field distribution and the metal bath conservation of mass small in ends, middle part metal
Melt will inwardly flow, and both ends metal bath flows outward, complete circulation track be formed, with the increase of working time, gold
The flow velocity for belonging to melt constantly enhances, until the resistance of motion and electromagnetic force reach dynamic equilibrium.
As shown in figure 4, middle part metal bath is inwardly moved to flowing up and down again after near axis by electromagnetic force, this
Kind is similar to churned mechanically " double loop " turbulent motion and can efficiently be stirred to entire melt.Therefore, the present invention mentions
The solenoid type magnetic stirrer of confession has both the advantages of mechanical agitator and traditional magnetic stirrer.
The present embodiment is suitable for metal continuous cast, semi-solid casting etc., especially suitable for particles reiforced metal-base composition
Casting.The core procedure of the described particles reiforced metal-base composition casting is the mixed of metal bath and enhancing solid particle
It closes, enhancing particle is the sunk type solid particle that density is slightly larger than metallic matrix, and in static state, particle can be under slower speed
It is heavy.Under the present embodiment, the power of movement is circulated up by fluid positioned at the subregional particle in 7 upper half of metal bath, is hindered
Hinder its sinking；Power positioned at the subregional particle in 7 lower half of metal bath by the downward shuttling movement of fluid first accelerates to sink,
Again by shuttling movement to 7 middle part of metal bath, the circulation of entire fluid is so that density is slightly larger than the enhancing particle of metallic matrix
It is uniformly distributed in metal bath 7.
Second embodiment:
The present embodiment the difference from the first embodiment is that the present embodiment using two solenoid coil 3-1 and 3-2, two
A solenoid coil 3-1 and 3-2 is reduced compared with first embodiment coil turn, therefore height reduces, and is separately connected a set of power supply
And frequency converter.
As shown in fig. 6, two solenoid coils 3-1 and 3-2 are located at the top and bottom in 7 outside of metal bath, and
It is symmetrical about 4 height center of crucible, since magnetic field is concentrated mainly near solenoid coil 3-1 and 3-2, metal
The electromagnetic force that 7 both ends of melt are subject to is larger, and the electromagnetic force that middle part is subject to is smaller, and both ends metal bath inwardly flows, and middle part is golden
Belong to melt to flow outward, metal bath forms the circulation loop of an entirety, and liquid form is turbulent flow, and loop direction and first is in fact
It is opposite to apply example.
The present embodiment is suitable for metal continuous cast, semi-solid casting etc., especially suitable for particles reiforced metal-base composition
Casting.The core procedure of the described particles reiforced metal-base composition casting is the mixed of metal bath and enhancing solid particle
It closes, enhancing particle is the floating type solid particle that density is slightly less than metallic matrix, and in static state, particle can be in slower speed
It is floating.Under the present embodiment, power positioned at the subregional particle in 7 upper half of metal bath by the downward shuttling movement of fluid hinders
It floats；The power of movement is circulated up by fluid positioned at the subregional particle in 7 lower half of metal bath, first accelerates to float up to gold
Belong to 7 middle part of melt, then by shuttling movement to 7 bottom of metal bath, the circulation of entire fluid is so that density is slightly less than Metal Substrate
The enhancing particle of body is uniformly distributed in metal bath 7.
3rd embodiment:
The present embodiment is the difference from the first embodiment is that the present embodiment is located at metal bath 7 using solenoid coil 3
The lower end in outside, and solenoid coil 3 is reduced compared with first embodiment coil turn, therefore height reduces.Solenoid coil 3 connects
A set of power supply and frequency converter.
As shown in fig. 7, solenoid coil 3 is located at the lower end in 7 outside of metal bath, since magnetic field is concentrated mainly on solenoid
Near coil 3, therefore the electromagnetic force that metal bath lower end is subject to is larger, and the electromagnetic force that upper end is subject to is smaller, and lower end metal is molten
Body inwardly flows and upper end metal bath flows outward, and metal bath forms the circulation loop of an entirety, and liquid form is rapids
Stream, loop direction are opposite with fourth embodiment.
The present embodiment is suitable for metal continuous cast, semi-solid casting etc., especially suitable for particles reiforced metal-base composition
Casting.The core procedure of the described particles reiforced metal-base composition casting is the mixed of metal bath and enhancing solid particle
It closes, enhancing particle is that density is greater than metallic matrix, and particle can be with the sunk type solid particle of fast speed sinking in static state.
Under the present embodiment, metal bath 7, which flows up, drives particle to move toward melt liquid level, and by circulating so that sunk type
Enhancing particle is uniformly distributed in metal bath 7.
Fourth embodiment:
The present embodiment is the difference from the third embodiment is that the present embodiment is located at metal bath 7 using solenoid coil 3
The upper end in outside.Solenoid coil 3 connects a set of power supply and frequency converter.
As shown in figure 8, solenoid coil 3 is located at the upper end in 7 outside of metal bath, since magnetic field is concentrated mainly on solenoid
Near coil 3, therefore the electromagnetic force that metal bath upper end is subject to is larger, and the electromagnetic force that lower end is subject to is smaller, and upper end metal is molten
Body inwardly flows and lower end metal bath flows outward, and metal bath forms the circulation loop of an entirety, and liquid form is rapids
Stream.
The present embodiment is suitable for metal continuous cast, semi-solid casting etc., especially suitable for particles reiforced metal-base composition
Casting.The core procedure of the described particles reiforced metal-base composition casting is the mixed of metal bath and enhancing solid particle
It closes, enhancing particle is that density is less than metallic matrix, and particle can be with the floating type solid particle of fast speed floating in static state.
Under the present embodiment, metal bath 7, which flows downward, drives particle to move toward crucible bottom, and by circulating so that floating type
Enhancing particle is uniformly distributed in metal bath 7.
5th embodiment:
The present embodiment is the difference from the second embodiment is that two the solenoid coils 3-1 and 3-2 that the present embodiment uses
In the height direction about 4 height center mal-distribution of crucible, two solenoid coils 3-1 and 3-2 are separately connected a set of electricity
Source and frequency converter.
As shown in figure 9, two solenoid coils 3-1 and 3-2 are located at the top and bottom in 7 outside of metal bath, and
About 4 height center mal-distribution of crucible, lower end-coil 3-2 is closer apart from 4 height center of crucible.Since magnetic field is mainly concentrated
Near solenoid coil 3-1 and 3-2, therefore the electromagnetic force that 7 both ends of metal bath are subject to is larger, between coil 3-1 and 3-2
The electromagnetic force that is subject to of region it is smaller, both ends metal bath inwardly flows, converge at the height center of coil 3-1 and 3-2 and to
Outer flowing, metal bath form the circulation loop of an entirety, and liquid form is turbulent flow, loop direction and first embodiment phase
Seemingly.
The present embodiment is suitable for metal continuous cast, semi-solid casting etc., especially suitable for particles reiforced metal-base composition
Casting.The core procedure of the described particles reiforced metal-base composition casting is the mixed of metal bath and enhancing solid particle
It closes, the sunk type enhancing grain density that the present embodiment is applicable in is between first embodiment and 3rd embodiment.
Except above-described embodiment, solenoid coil 3 can have different number, the combination of position meets a variety of different liquid forms
Requirement, can specifically be matched according to different usage scenarios, the metallic matrix of different physical characteristic and enhancing particle.
As it will be easily appreciated by one skilled in the art that the foregoing is merely presently preferred embodiments of the present invention and oneself, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of solenoid type magnetic stirrer characterized by comprising shell, solenoid coil, crucible, Resistant heating
Unit and heat insulation layer；
Coil support wall is provided in the shell, the solenoid coil is wrapped on the coil support wall, the helical
Pipeline circle can provide radial and axial electromagnetic force after being powered；
The Resistant heating unit is used to heat and keep the molten condition of metal for the crucible；The heat insulation layer be used for every
Exhausted high temperature protects the solenoid coil.
2. solenoid type magnetic stirrer as described in claim 1, which is characterized in that when work, the solenoid coil exists
The magnetic field generated at its height center is greater than the magnetic field at both ends, and electromagnetic force suffered by metal bath middle part is greater than electromagnetism suffered by both ends
Power, metal bath will generate the movement tendency of inward flow, inwardly flow in the middle part of melt composition, what both ends were flowed outward
" double loop " flow trace, it is this that efficiently entire melt can be carried out similar to churned mechanically " double loop " turbulent motion
Stirring.
3. solenoid type magnetic stirrer as described in claim 1, which is characterized in that when solenoid coil is single coil
When, it being wrapped on the coil support wall, the magnetic field that the solenoid coil generates is smaller at thiol maximum, both ends,
Molten metal is also in the big distribution small in ends in middle part in the electromagnetic force that synchronization is subject in crucible.
4. solenoid type magnetic stirrer as described in claim 1, which is characterized in that when solenoid coil is single coil
When, the lower end on the outside of metal bath is set, and when work, the electromagnetic force that metal bath lower end is subject to is larger, what upper end was subject to
Electromagnetic force is smaller, lower end metal bath inward flow and upper end metal bath flows outward, metal bath formed one it is whole
The circulation loop of body, liquid form are turbulent flow.
5. solenoid type magnetic stirrer as described in claim 1, which is characterized in that when solenoid coil is single coil
When, the upper end on the outside of metal bath is set, and when work, the electromagnetic force that metal bath upper end is subject to is larger, what lower end was subject to
Electromagnetic force is smaller, upper end metal bath inward flow and lower end metal bath flows outward, metal bath formed one it is whole
The circulation loop of body, liquid form are turbulent flow.
6. solenoid type magnetic stirrer as described in claim 1, which is characterized in that when solenoid coil is two coils
When, two coils are separately positioned on the top and bottom on the outside of metal bath, and the height center about crucible is symmetrical.
7. solenoid type magnetic stirrer as described in claim 1, which is characterized in that when solenoid coil is two coils
When, two coils are separately positioned on the top and bottom on the outside of metal bath, and the height center asymmetric distribution about crucible.
8. such as the described in any item solenoid type magnetic stirrers of claim 1-7, which is characterized in that the solenoid coil is
Solid copper conductor or hollow copper tubing.
9. such as the described in any item solenoid type magnetic stirrers of claim 1-8, which is characterized in that the solenoid type electromagnetism
Blender further include: frequency converter and power supply, one end of the frequency converter connect the solenoid coil, the frequency converter it is another
End connects the power supply, and the frequency converter can arbitrarily change the alive frequency of the solenoid coil institute between 0~100Hz,
The power supply can arbitrarily change the alive virtual value size of the solenoid coil institute between 0~400A.
10. such as the described in any item solenoid type magnetic stirrers of claim 1-9, which is characterized in that the Resistant heating
Unit includes: resistance wire, thermocouple and temperature regulation circuit；
The resistance wire is used for heating crucible, and the thermocouple is for detecting crucible temperature and temperature feedback being adjusted electricity to temperature
Road, the temperature regulation circuit are maintained at crucible temperature in user's set temperature according to thermocouple feedback.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811553501.7A CN109351929A (en) | 2018-12-18 | 2018-12-18 | A kind of solenoid type magnetic stirrer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811553501.7A CN109351929A (en) | 2018-12-18 | 2018-12-18 | A kind of solenoid type magnetic stirrer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109909464A (en) * | 2019-04-11 | 2019-06-21 | 东北大学 | A kind of saturating magnetic high thermal conductivity crystallizer inner sleeve of height with skeleton structure |
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