CN108187557A - A kind of high-efficiency stirring method and device of no volume gas aluminium-nitridation silicon melt - Google Patents

A kind of high-efficiency stirring method and device of no volume gas aluminium-nitridation silicon melt Download PDF

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Publication number
CN108187557A
CN108187557A CN201810012552.2A CN201810012552A CN108187557A CN 108187557 A CN108187557 A CN 108187557A CN 201810012552 A CN201810012552 A CN 201810012552A CN 108187557 A CN108187557 A CN 108187557A
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aluminium
volume
graphite crucible
silicon melt
melt
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CN201810012552.2A
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张伟
张伟一
杜云慧
张鹏
王玉洁
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Beijing Jiaotong University
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Beijing Jiaotong University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/70—Mixers specially adapted for working at sub- or super-atmospheric pressure, e.g. combined with de-foaming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F2035/99—Heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/26—Mixing ingredients for casting metals

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Silicon Compounds (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

The invention discloses a kind of high-efficiency stirring method and devices of no volume gas aluminium nitridation silicon melt, belong to the materials working research field such as metallurgical, casting, the present invention, which using inner wall is furnished with the variable volume graphite crucible of prismatic blade and with high speed electromagnetic stirring is combined mode and nitrogenizes silicon melt to aluminium, to be stirred；Utilize variable volume graphite crucible, empty all gas on melt top, and then under conditions of completely cutting off completely with ambient atmos, it is stirred using high speed electromagnetic, generate circumferential high-speed stirred movement, utilize the prismatic blade on graphite crucible inner wall, prevent the downward precipitation of silicon nitride particle and centrifugation segregation movement, so as to efficiently obtain the equally distributed aluminium nitridation silicon melt of the silicon nitride particle of no volume gas, mixing time can shorten to 2 minutes, solve the problems, such as volume gas and stirring efficiency low technical present in aluminium nitridation silicon melt stirring.

Description

A kind of high-efficiency stirring method and device of no volume gas aluminium-nitridation silicon melt
Technical field
The invention belongs to the materials working research fields such as metallurgical, casting, more particularly to a kind of no volume gas aluminium-nitridation silicon melts High-efficiency stirring method and device.
Background technology
In the materials working research fields such as metallurgical, casting, it is often necessary to various melts are stirred, such as metal half Solid size, the stirring for adding particle melt etc., it is therefore an objective to make the homogenization such as temperature, ingredient, the tissue of melt.Stirring efficiency Stirring intensity is generally depended on, stirring intensity is bigger, and the shearing of formation and turbulent flow are stronger, and melt realizes temperature, ingredient, tissue etc. The mixing time of homogenization is shorter, and stirring efficiency is higher.However, strong stirring can lead to the volume gas problem of melt, easily High-temperature fusant oxidation, formation is caused to be mingled with tissue etc., even with protective atmosphere, volume gas can also make to spread stomata in melt, Material property is caused to deteriorate, it is seen then that volume gas problem has fettered the stirring intensity of melt, reduces stirring efficiency.Aluminium-silicon nitride is multiple Condensation material contains the silicon of 1.8wt% or so and the silicon nitride particle of 15wt% or so, has high specific strength, the Gao Bigang of aluminum substrate concurrently The advantages that degree, heat conduction are soon and the hardness of silicon nitride particle is high, thermal stability is good, wear-resistant, is widely used in aerospace, vapour The fields such as vehicle, military project.Due to 1900 DEG C of 660 DEG C of fusing points for being higher than aluminium of fusing point of silicon nitride, silicon nitride is in molten aluminum body Existing in the form of solid granulates, in addition, 3.2~3.5g/cm of density due to silicon nitride3More than aluminium density 2.6~ 2.8g/cm3, so silicon nitride particle easily precipitates in aluminium-nitridation silicon melt, therefore, to expeditiously prepare nitrogen The equally distributed aluminium of silicon carbide particle-nitridation silicon melt and then high performance aluminium-silicon nitride composite material is obtained, must just increased pair The stirring intensity of melt, such volume gas problem just more highlight.Authorization Notice No. CN105436436B, Authorization Notice No. CN The patents of invention such as 103307900B by the methods of " narrow stir chamber in melt liquid level ", " setting melt disturbance isolator " come Barrier agitation transmits to melt liquid level, avoids melt volume gas.The angle that the present invention completely cuts off completely from melt and gas carries out Creativity and innovation in terms of melt stirring has broken away from constraint of the volume gas to stirring intensity and stirring efficiency, can expeditiously prepare nothing The equally distributed aluminium of silicon nitride particle-nitridation silicon melt of volume gas.
Invention content
The technical problems to be solved by the invention are that volume gas present in aluminium-nitridation silicon melt stirring and stirring efficiency are low Problem provides a kind of high-efficiency stirring method and device of no volume gas aluminium-nitridation silicon melt.
The technical solution adopted by the present invention to solve the technical problems is：
The variable volume graphite crucible that prismatic blade is furnished with using inner wall is combined mode to aluminium-silicon nitride with high speed electromagnetic stirring Melt is stirred；Using variable volume graphite crucible, by reducing the volume of graphite crucible, melt top in graphite crucible is emptied All gas, and under conditions of melt and ambient atmos completely isolation, i.e., under conditions of no gas source, carry out melt Stirring, and then melt volume gas is avoided from root；It is stirred using high speed electromagnetic, in the case where no volume gas fetters, makes aluminium-nitrogen SiClx melt generates circumferential high-speed stirred movement, using the prismatic blade on graphite crucible inner wall, constantly by aluminium-nitridation of surrounding Silicon melt move on to it is internal, the aluminium of lower part-nitridation silicon melt is moved on to top, and then prevent silicon nitride particle downward precipitation and from Heart segregation moves, so as to efficiently obtain the equally distributed aluminium of the silicon nitride particle of no volume gas-nitridation silicon melt.
The beneficial effects of the invention are as follows：Using the present invention, aluminium-nitridation silicon melt is stirred, can directly be prepared The aluminium that no volume gas, silicon nitride particle are evenly distributed-nitridation silicon melt, mixing time can shorten to 2 minutes, and stirring efficiency compares document “Pardeep Sharma,Satpal Sharma,Dinesh Khanduja.Production and some properties of Si3N4reinforced aluminium alloy composites.Journal of Asian Ceramic Societies 3 (2015) 352-359 " reports improve 400% in 10 minutes, solve and are deposited in aluminium-nitridation silicon melt stirring Volume gas and stirring efficiency low technical problem.
Description of the drawings
Fig. 1 is the front view that the method for the present invention stirs aluminium-nitridation silicon melt device.
In figure, graphite crucible 2, prismatic blade 3, heating tube 4, cooling tube 5, aluminium-nitridation silicon melt 6, blocking 7, outer cover 8, bottom Frame 9, volume adjustment head 10, thermocouple 11, conical gas vent 12, blocking 13, trip bolt 14, spring 15, bearing shell 16, thrust Bearing 17, motor 18, transmission mechanism 19, guide plate 20, connection slide plate 21, buffer spring 22, connecting screw 23, guide groove 24, Rack 25, motor 26, transmission mechanism 27, stent 28.
Fig. 2 is the A-A views that the method for the present invention stirs aluminium-nitridation silicon melt device.
In figure, electromagnetic pole is to 1.
Fig. 3 is the B-B views that the method for the present invention stirs aluminium-nitridation silicon melt device.
Fig. 4 is the C-C views that the method for the present invention stirs aluminium-nitridation silicon melt device.
Fig. 5 is the D-D partial views that the method for the present invention stirs aluminium-nitridation silicon melt device.
Fig. 6 is the E-E partial views that the method for the present invention stirs aluminium-nitridation silicon melt device.
Fig. 7 is the water quenching microstructure of aluminium-nitridation silicon melt of the method for the present invention stirring.
Specific embodiment
The method of the present invention stirring aluminium-nitridation silicon melt device is described as follows with reference to attached drawing：
As Figure 1-Figure 4, the Efficient Agitator of no volume gas aluminium-nitridation silicon melt is mainly stirred by high speed electromagnetic and filled It puts, graphite crucible 2 and its volume adjustment device are formed with moving up and down device, thermocouple 11, blocking 7 and chassis 9.
As shown in Figure 1, Figure 2, Figure 4 shows, three pairs of electromagnetic poles of high speed electromagnetic agitating device are distributed on to 1 around graphite crucible 2, The distance between 2 outer wall of graphite crucible is 5mm, and electromagnetic pole is to 1 outside plus outer cover 8.
As shown in Figure 1, Figure 2, Figure 3 shows, graphite crucible 2 is fixed on using mechanical connection manner on chassis 9, graphite crucible 2 Heating tube 4 and cooling tube 5 uniformly at intervals in wall are connect respectively with external power supply with cooling liquid supply system；In graphite crucible 2 Upper inside wall is machined with internal thread, cooperates with the external screw thread of 10 lower end of volume adjustment head；Graphite crucible 2 internal thread with Under inner wall on prismatic blade 3 is distributed with, connect using mechanical connection manner with the inner wall of graphite crucible 2.Prismatic blade 3 is in graphite earthenware It is distributed on 2 different height of crucible in horizontal layer, the interval a of the lower edge of undermost prismatic blade 3 and the inner bottom surface of graphite crucible 2 For 0~20mm, the interval b between adjacent prismatic blade layer is 0~20mm, by adjusting a and b, make top layer prismatic blade 3 it is upper The lowermost interval c at edge and 2 internal thread of graphite crucible is maintained at 0~10mm, and the upper table of aluminium-nitridation silicon melt 6 faces upward The lowermost distance d for being higher by 2 internal thread of graphite crucible is 5~10mm.In same prismatic blade layer, the root of three prismatic blades 3 It is 120 ° that portion position, which is distributed on the inner wall of graphite crucible 2 i.e. interval α angle, and the length e of prismatic blade 3 is the half of graphite crucible 2 Diameter, width are 1/3rd of the radius of graphite crucible 2.On the length direction of each prismatic blade 3, the head of prismatic blade 3 On the basis of 2 horizontal circle center of graphite crucible is directed toward, tilted along the flow direction of aluminium-nitridation silicon melt 6, prismatic blade 3 Angle β with the 2 horizontal circumference line of centres of its root and graphite crucible is 30 °, constantly to melt aluminium-silicon nitride of surrounding Body 6 moves on to inside；In the width direction of each prismatic blade 3, the upper blade of prismatic blade 3 descends blade along aluminium-silicon nitride relatively The flow direction of melt 6 tilts, and the width direction of prismatic blade 3 and the angle γ of horizontal plane are 35 °, so that continuous underground is by portion Aluminium-nitridation silicon melt 6 moves on to top.The root position of prismatic blade 3 in adjacent prismatic blade layer is on same level perspective plane It is 60 ° to be spaced δ angles.
As shown in Figure 1, Figure 4, Figure 5, the volume adjustment device of graphite crucible 2 is by volume adjustment head 10, blocking 13, fastening spiral shell Nail 14, spring 15 and driving device are formed, and are used to implement the volume adjustment of graphite crucible 2.Volume adjusts head 10, and material is stone Ink, upper part are round bar, and lower part is disk, and external screw thread is machined in disk side, the internal thread with 2 upper inside wall of graphite crucible It cooperates；Infundibulate gas vent 12 is equipped on disk.The rectangular tablet lower left quarter of blocking 13 is carried adjusts head 10 with volume Disk uniform thickness round platform, rectangular tablet right part is equipped with circular hole, and blocking 13 is limited in leakage by right part circular hole by trip bolt 14 In bucket shape gas vent 12, there is the gap of 1mm between the round platform of blocking 13 and infundibulate gas vent 12；Spring 15 is sleeved on trip bolt On 14 screw rod, effect is to jack up blocking 13, when screw-in reduces 2 volume of graphite crucible to volume adjustment head 10 downwards, just In the air discharge in graphite crucible 2；Rotate clockwise the rectangular handle at the top of trip bolt 14, the disk below handle The rectangular flat-plate compressed of blocking 13 is attached to the upper surface of volume adjustment 10 lower disk of head, seals infundibulate gas vent 12.It drives Dynamic device is made of motor 18, transmission mechanism 19 and detent mechanism, for volume adjustment head 10 to be driven to screw in downwards and rotation upwards Go out graphite crucible 2, be the key device for realizing the adjustment of 2 volume of graphite crucible；Transmission mechanism 19 is by turbine and worm screw, gear and tooth Wheel transmission is formed；Detent mechanism is located at the round bar top of volume adjustment head 10, and located lateral is carried out by upper and lower two bearing shells 16, by Upper and lower two thrust bearings 17 carry out longitudinal register；Motor 18, transmission mechanism 19 and the detent mechanism of driving device are respectively adopted Mechanical connection manner is fixed on guide plate 20, carries out moving down in the guide groove 24 that guide plate 20 can be on stent 28 be fixed on It is dynamic.
As shown in Fig. 1, Fig. 6, move up and down device by motor 26, transmission mechanism 27, connection slide plate 21, buffer spring 22, Connecting screw 23 is formed.Transmission mechanism 27 is made of rack 25 and gear, turbine and worm-drive, the lower end of rack 25 and connection Slide plate 21 is connected using mechanical connection manner.In the guide groove 24 that connection slide plate 21 can be on stent 28 be fixed on move down It is dynamic, and pass through buffer spring 22 and connecting screw 23 is connect with guide plate 20, volume is made to adjust above and below head 10 and its driving device It is mobile.In bearer connection screw rod 23, guide plate 20, volume adjustment head 10 and its driving device, thermocouple 11, blocking 13, fastening After the related components such as screw 14, spring 15, the decrement of buffer spring 22 is also greater than the maximum of 2 internal thread of graphite crucible Screw-in depth.Move up and down the motor 26 of device, transmission mechanism 27 is fixed on using mechanical connection manner on stent 28.
As Figure 1 and Figure 4, thermocouple 11 is fixed on volume adjustment head 10, and lower end connects with aluminium-nitridation silicon melt 6 It touches, stretches into 4mm in aluminium-nitridation silicon melt 6, block 7 bottoms for being located at graphite crucible 2.
A kind of high-efficiency stirring method of no volume gas aluminium-nitridation silicon melt is furnished with the variable volume of prismatic blade using above-mentioned inner wall Graphite crucible is combined mode with high speed electromagnetic stirring and aluminium-nitridation silicon melt is stirred；Using variable volume graphite crucible, lead to The volume of the small graphite crucible of over-subtraction empties all gas on melt top in graphite crucible, and complete with ambient atmos in melt Under conditions of full isolation, i.e., under conditions of no gas source, the stirring of melt is carried out, and then melt volume gas is avoided from root； It is stirred using high speed electromagnetic, in the case where no volume gas fetters, aluminium-nitridation silicon melt is made to generate circumferential high-speed stirred movement, profit With the prismatic blade on graphite crucible inner wall, constantly by the aluminium of surrounding-nitridation silicon melt move on to it is internal, by aluminium-nitridation of lower part Silicon melt moves on to top, and then prevents the downward precipitation of silicon nitride particle and centrifugation segregation movement, so as to efficiently obtain nothing The equally distributed aluminium of silicon nitride particle-nitridation silicon melt of volume gas.Include the following steps：
Step 1, aluminium-nitridation silicon melt is prepared, temperature is controlled at 700 DEG C；
Step 2, above-mentioned aluminium-nitridation silicon melt to be poured into graphite crucible 2, the preheating temperature of graphite crucible 2 is 700 DEG C, Preheating is realized by the heating tube 4 in its wall；
Step 3, start and move up and down device, the external screw thread of 10 lower end of volume adjustment head is dropped into edge on graphite crucible 2 Internal thread at, closing move up and down device；Start the driving device of volume adjustment head 10, by the external screw thread of volume adjustment head 10 It screws in the internal thread of graphite crucible 2, when aluminium-nitridation silicon melt 6 starts along the round platform of blocking 13 and infundibulate gas vent 12 Between gap, when being overflowed from the lower part of the rectangular tablet of blocking 13, close the driving device of volume adjustment head 10；It twists clockwise Tight trip bolt 14, infundibulate gas vent 12 is sealed, melt is made to completely cut off completely with ambient atmos；
Step 4, thermocouple 11 is connected, using thermocouple 11 to external power supply and cooling liquid supply system input information, is adjusted Heating tube 4 and cooling tube 5 are saved, makes the temperature stabilization of aluminium-nitridation silicon melt 6 at 700 DEG C, starts high speed electromagnetic agitating device, it is right Aluminium-nitridation silicon melt 6 carries out Isothermal stirring, stablizes stirring 2 minutes or so；
Step 5, closing high-speed electromagnetic mixing apparatus unscrews trip bolt 14 counterclockwise, makes blocking 13 in the work of spring 15 It is bounced under, aluminium-nitridation silicon melt 6 can be released by opening blocking 7, for using.
Fig. 7 is the water quenching microstructure of aluminium-nitridation silicon melt of the method for the present invention stirring, and darker regions are aluminium base in figure Body, light areas are silicon nitride particle, it is seen then that do not have stomata on aluminum substrate, silicon nitride particle is evenly distributed in aluminum substrate.
Embodiment one, the power of high speed electromagnetic agitating device is 20kW, rotating speed is 900 revs/min, a 0mm, b are Under conditions of 0mm, c 0mm, d are 5mm, after stablizing stirring 50 seconds 1 minute, no volume gas can obtain, silicon nitride particle is evenly distributed Aluminium-nitridation silicon melt 6.
Embodiment two, the power of high speed electromagnetic agitating device is 20kW, rotating speed is 1200 revs/min, a 20mm, b are Under conditions of 20mm, c 10mm, d are 10mm, after stablizing stirring 2 minutes, no volume gas can obtain, silicon nitride particle is evenly distributed Aluminium-nitridation silicon melt 6.
As it can be seen that under the premise of being emptied using variable volume graphite crucible and completely cutting off contact of the gas with melt, and then in big work( Under rate, high speed electromagnetic stirring condition, the method for the present invention can expeditiously prepare no volume gas, silicon nitride particle is evenly distributed aluminium- Nitrogenize silicon melt.

Claims (4)

  1. A kind of 1. high-efficiency stirring method of no volume gas aluminium-nitridation silicon melt, which is characterized in that the change of prismatic blade is furnished with using inner wall Volume graphite crucible is combined mode with high speed electromagnetic stirring and aluminium-nitridation silicon melt is stirred；Utilize variable volume graphite earthenware Crucible by reducing the volume of graphite crucible, empties all gas on melt top in graphite crucible, and in melt and extraneous gas Under conditions of body isolation completely, i.e., under conditions of no gas source, the stirring of melt is carried out, and then melt is avoided to roll up from root Gas；It is stirred using high speed electromagnetic, in the case where no volume gas fetters, aluminium-nitridation silicon melt is made to generate circumferential high-speed stirred movement, Using the prismatic blade on graphite crucible inner wall, constantly by the aluminium of surrounding-nitridation silicon melt move on to it is internal, by aluminium-nitrogen of lower part SiClx melt moves on to top, and then prevents the downward precipitation of silicon nitride particle and centrifugation segregation movement, so as to efficiently obtain The equally distributed aluminium of silicon nitride particle without volume gas-nitridation silicon melt, includes the following steps：
    Step 1, aluminium-nitridation silicon melt is prepared, temperature is controlled at 700 DEG C；
    Step 2, above-mentioned aluminium-nitridation silicon melt is poured into graphite crucible, the preheating temperature of graphite crucible is 700 DEG C, by its wall Interior heating tube realizes preheating；
    Step 3, start and move up and down device, the external screw thread of volume adjustment head lower end is dropped to the internal thread on edge on graphite crucible Place, closing move up and down device；Start the driving device of volume adjustment head, volume adjustment head is screwed into graphite crucible Internal thread in, when aluminium-nitridation silicon melt start along between the round platform of blocking and infundibulate gas vent gap, from blocking When the lower part of rectangular tablet is overflowed, the driving device of volume adjustment head is closed；Trip bolt is tightened clockwise, infundibulate is deflated Mouth seals, and melt is made to completely cut off completely with ambient atmos；
    Step 4, thermocouple is connected, using thermocouple to external power supply and cooling liquid supply system input information, adjusts heating tube And cooling tube, make the temperature stabilization of aluminium-nitridation silicon melt at 700 DEG C, start high speed electromagnetic agitating device, aluminium-silicon nitride is melted Body carries out Isothermal stirring, stablizes stirring 2 minutes；
    Step 5, closing high-speed electromagnetic mixing apparatus unscrews trip bolt counterclockwise, and blocking is made to bounce under the action of the spring, beats Aluminium-nitridation silicon melt can be released by opening blocking, for using.
  2. 2. the high-efficiency stirring method of a kind of no volume gas aluminium-nitridation silicon melt according to claim 1, which is characterized in that high The rotating speed of fast electromagnetic mixing apparatus is 900~1200 revs/min.
  3. 3. a kind of Efficient Agitator of no volume gas aluminium-nitridation silicon melt, the device include：High speed electromagnetic agitating device, graphite Crucible 2 and its volume adjustment device are with moving up and down device, thermocouple 11, blocking 7 and chassis 9；It is characterized in that：
    Internal thread is machined in the upper inside wall of graphite crucible 2, is cooperated with the external screw thread of 10 lower end of volume adjustment head；Graphite The volume adjustment device of crucible 2 is made of volume adjustment head 10, blocking 13, trip bolt 14, spring 15 and driving device, is used for Realize the volume adjustment of graphite crucible 2；Volume adjusts head 10, and material is graphite, and upper part is round bar, and lower part is disk, in circle Disc side is machined with external screw thread, cooperates with the internal thread of 2 upper inside wall of graphite crucible；Infundibulate is equipped on disk to deflate Mouth 12；The rectangular tablet lower left quarter of blocking 13 carries the round platform with the disk uniform thickness of volume adjustment head 10, and rectangular tablet right part is set There is circular hole, blocking 13 is limited in by trip bolt 14 in infundibulate gas vent 12 by right part circular hole, the round platform of blocking 13 and leakage There is the gap of 1mm between bucket shape gas vent 12；Spring 15 is sleeved on the screw rod of trip bolt 14, and effect is to jack up blocking 13, When screw-in reduces 2 volume of graphite crucible to volume adjustment head 10 downwards, convenient for the air discharge in graphite crucible 2；Clockwise The rectangular flat-plate compressed of blocking 13 can be attached to volume tune by the rectangular handle at the top of rotational fastener screw 14, the disk below handle The upper surface of whole 10 lower disk of head, seals infundibulate gas vent 12；Driving device is by motor 18, transmission mechanism 19 and positioning Mechanism is formed, and is to realize 2 volume of graphite crucible for volume adjustment head 10 to be driven to screw in downwards and screws out graphite crucible 2 upwards The key device of adjustment；Transmission mechanism 19 is made of turbine and worm screw, gear and gear drive；Detent mechanism is located at volume adjustment First 10 round bar top, located lateral is carried out by upper and lower two bearing shells 16, and longitudinal register is carried out by upper and lower two thrust bearings 17； Motor 18, transmission mechanism 19 and the detent mechanism of driving device are respectively adopted mechanical connection manner and are fixed on guide plate 20, lead It is moved up and down into the guide groove 24 that plate 20 can be on stent 28 be fixed on；Device is moved up and down by motor 26, driver Structure 27, connection slide plate 21, buffer spring 22, connecting screw 23 are formed；Transmission mechanism 27 is by rack 25 and gear, turbine and worm screw Transmission is formed, and the lower end of rack 25 is connected with connecting slide plate 21 using mechanical connection manner；Connection slide plate 21 can be fixed on branch It is moved up and down in guide groove 24 on frame 28, and passes through buffer spring 22 and connecting screw 23 is connect with guide plate 20, made Volume adjusts head 10 and its driving device moves up and down；In bearer connection screw rod 23, guide plate 20, volume adjustment head 10 and its drive After the related components such as dynamic device, thermocouple 11, blocking 13, trip bolt 14, spring 15, the decrement of buffer spring 22 is also It is greater than the maximum screw-in depth of 2 internal thread of graphite crucible；Move up and down the motor 26 of device, transmission mechanism 27 is connected using machinery The mode of connecing is fixed on stent 28.
  4. 4. a kind of Efficient Agitator of no volume gas aluminium-nitridation silicon melt according to claim 3, which is characterized in that aluminium- The lowermost distance d that the upper table of nitridation silicon melt 6 is higher by upwardly 2 internal thread of graphite crucible is 5~10mm.
CN201810012552.2A 2018-01-05 2018-01-05 A kind of high-efficiency stirring method and device of no volume gas aluminium-nitridation silicon melt Withdrawn CN108187557A (en)

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Application publication date: 20180622