CN108941497A - The casting device and casting method of miniature turbocompressor multistage turbine rotor - Google Patents
The casting device and casting method of miniature turbocompressor multistage turbine rotor Download PDFInfo
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- CN108941497A CN108941497A CN201810989543.9A CN201810989543A CN108941497A CN 108941497 A CN108941497 A CN 108941497A CN 201810989543 A CN201810989543 A CN 201810989543A CN 108941497 A CN108941497 A CN 108941497A
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- turbine rotor
- turbocompressor
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- mold die
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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
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
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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
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/12—Controlling, supervising, specially adapted to centrifugal casting, e.g. for safety reasons
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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
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
-
- 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
- B22D27/15—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using vacuum
Abstract
The present invention relates to the casting devices and casting method of a kind of miniature turbocompressor multistage turbine rotor, casing assembly including vacuum-pumping, the centrifugation control assembly in casing assembly and digital casting controlling component, mold die is set in centrifugation control assembly, digital casting controlling component is located above mold die, it is equipped with the heating coil for carrying out program temperature regulation to it in mold die, makes in mold die molten state alloy Slow cooling in gradient.The present apparatus realizes molten state alloy Slow cooling in gradient, orderly, fine and close, uniform metal lattice form is formed in multistage turbine rotor casting, improve the firmness and toughness of casting, it is expected to solve the problems such as product quality especially structural strength is unstable, rotor blade ratio of defects is high present in the existing miniature turbocompressor multistage turbine rotor casting process, realizes successfully to cast and obtain with precision size, the good miniature turbocompressor multistage turbine rotor of physical property.
Description
Technical field
The present invention relates to compressor multistage turbine rotors, and in particular to a kind of miniature turbocompressor multistage turbine turn
The casting device and casting method of son.
Background technique
Turbocompressor since its charge flow rate is big, revolving speed is high, runs smoothly, simple and compact for structure, instrument automation,
The fields such as chemical, aerospace are widely used.Carry out lift gas pressure by the interaction force between rotary blade and air-flow
Power, while so that air-flow is generated acceleration and obtain the turbocompressor of kinetic energy, so that air-flow is slowed down in diffuser, by gas kinetic energy
It is converted into pressure energy output acting.Since gas flowing is continuously, to convey in air-flow to turbocompressor in compression process
Gas pressure can be promoted gradually in journey, therefore be required the strength of materials of turbo blade very high.Miniature turbocompressor is due to it
It is small in size, thrust ratio is big, revolving speed is high, it is adaptable, output stablize the advantages that, be widely used in the army and the people's every field.It is micro- at present
The integral casting method of type turbocompressor turbine rotor is less, since structure is complicated for miniature turbine, blade large specific surface area,
Gap is small between leaf, therefore conventional casting methods manufacture has very big difficulty.
The wheel disc and blade of turbine are manufactured respectively with cutting or casting method, then is assembled, and are turbocompressor turbines
The manufacturing method that rotor generallys use.However when the size of turbine rotor it is small to a certain extent after, utilize cutting method or casting
The wheel disc and blade of manufacture carry out again effectively connect just it is extremely difficult, limit the further of turbine rotor diameter to a certain extent
Reduce.
It is also common manufacturing method using precision cutting technique manufacture wheel disc and the integrated turbine rotor of blade, however
This technique is very high to the function and requirement on machining accuracy of equipment, thus cost is also very high, and still remain to small size turbine,
The problems such as very thin blade processing has difficulties.For monoblock cast method due to its lower production costs, Recent study is more popular,
But for miniature turbine blade, there is also cavity when casting be not easy casting uniformly, product strength be not sufficiently stable, product defects rate
High insoluble problem.
Authorization Notice No. discloses a kind of vacuum centrifugal casting machine for the Chinese invention patent of CN 101722289B, including
The composition such as shaft, upper die and lower die, bottom plate, slide plate, upper and lower mould hold-down mechanism；Authorization Notice No. is the China of CN101954467B
Patent of invention discloses a kind of vacuum centrifugal casting method and device, and method includes molding, vacuumizes centrifugation, casting, demoulding
Step；The Chinese invention patent that Authorization Notice No. is CN 104209488B discloses a kind of vacuum centrifugal casting method and its dress
It sets, device includes vacuum drying oven, shaft, rotating platform, shell mold and heater.It is above-mentioned about vacuum centrifugal casting method and its
The patent of device appreciates the method for using vacuum-centrifugation to combine easily to be existed to overcome in conventional centrifugal casting medium casting
The phenomenon that stomata, it is therefore an objective to make workpiece fill type good.
The common problem of above-mentioned patent be them and be not for miniature turbocompressor multistage turbine rotor from
Core type vacuum pressing and casting field is specially designed, therefore there is no in view of miniature turbocompressor, with multistage turbine rotor, this is high
The manufacture particularity of precision industrial goods: not only whirlpool is eliminated in view of the method combined using high speed centrifugation and vacuum casting
Bubble existing for inside rotor blades, vapour lock, phenomena such as aoxidizing existing for surface, it is often more important that: 1) it to can be realized more
The monoblock cast of grade turbine shaft and rotor blade, one-pass molding reduce the brings stress such as subsequent possible welding and concentrate position
Point；2) it needs to consider temperature control and casting Process Synchronization in multistage turbine rotor casting process, and then controls alloy material
Crystallization process, product quality especially intensity caused by avoiding mold die temperature and crystallization controllability difference etc. difficult is unstable,
The high problem of rotor blade ratio of defects；3) in being cast for miniature turbocompressor with multistage turbine rotor, how by temperature control
System and the coupling of high speed centrifugation control process, the characteristics of to make full use of conventional centrifugal to cast, pass through adjust it is different in casting process
Centrifugal force size suffered by the mold die in stage, realization orderly control its segregation to the alloy of different materials composition proportion, even
It can accomplish to orient gradient segregation, so as to realize that different functions is needed by the component difference for controlling blade different location
Asking is also the specific question that absolutely not considers of above-mentioned patent.
Summary of the invention
In view of the above problems, in order to hot investment casting miniature turbocompressor multistage turbine rotor, in monoblock cast
On the basis of method, the method combined using high speed centrifugation and vacuum casting, in turn in conjunction with the temperature control in casting process
Alloy material crystallization is controlled, is cast with solving miniature turbocompressor internal cavity in multistage turbine rotor casting process at present
Be not easy uniformly, inside turbine rotor blade existing for bubble, vapour lock, oxidation, mold die temperature and crystallization existing for surface by
The problems such as product quality especially intensity is unstable, rotor blade ratio of defects is high caused by control property difference etc. is difficult, the present invention provides
A kind of casting device and casting method of miniature turbocompressor multistage turbine rotor.
The invention is realized by the following technical scheme:
A kind of casting device of miniature turbocompressor multistage turbine rotor, casing assembly including vacuum-pumping are set
In setting casting mold mould in centrifugation control assembly and digital casting controlling component in casing assembly, the centrifugation control assembly
Tool, the digital casting controlling component are located above mold die, are equipped in the mold die and carry out program temperature to it
The heating coil of regulation makes in mold die molten state alloy Slow cooling in gradient.
Further, the heating coil and digital casting controlling component connect temperature-controlling module, including with add
The temperature sensing collecting ring brush and heating collecting ring brush of heat coil connection, and connect with digital casting controlling component
Heating power supply and sensor.Heating coil is located above adjustable speed turntable, be annularly embedded in mold die inner side and
Lower section, heating power supply and sensor are set to the shaft core position immediately below small-sized induction furnace, using temperature sensing-feedback loop control
The heating power of small-sized induction furnace is made, heating collecting ring brush is set to the shaft core position immediately below adjustable speed turntable, covers and is turning
In dish axle, while being connected with conducting wire with casting and temperature control circuits assembly, temperature sensing collecting ring brush is set to adjustable speed and turns
Shaft core position immediately below disk, heating collecting ring brush lower section, covers on turntable shaft, while with conducting wire and casting and temperature control circuits
Assembly is connected.During molten state alloy liquid slurry enters mold die, temperature sensing collecting ring brush tune is utilized
Section carries out temperature regulation by the size of current of heating coil, realizes the slowly controlled cooling in gradient of molten state alloy, is being formed
Guarantee that the metal lattice generated is stable, uniform during solid, fastness and toughness is improved, to reach multistage turbine rotor casting
It is required that the strength of materials.Mold die is located at the lower section of small-sized induction furnace and control pin of casting, and mold die is integrally fastened to can
Adjust the speed turntable upper center position.
Further, the digital casting controlling component includes the small-sized induction furnace and use for melted alloy material
Enter the casting control pin of mold die from small-sized induction furnace in control molten alloy, small-sized induction furnace is located at airtight inner housing
The casting in mold die in the bottom is heated using electromagnetic induction principle in topmost central location, casting control
Cotter is located at the lower section of small-sized induction furnace, and the top of casting mold and casting is total by being drivingly connected route and casting and temperature control circuits
At being connected, the digital casting controlling component manipulation outside pressure casing body is set, the casting process of aluminium alloy is controlled.
Further, the centrifugation control assembly includes adjustable speed turntable, the gearbox for being connected to adjustable speed turntable lower part
And driving motor, driving motor are connect by driving motor power supply line with driving motor route assembly.The adjustable speed turntable packet
The turntable of turntable shaft He its top support mold die is included, main body is metal structure, and turntable upper top is coated with high temperature resistant pottery
Porcelain coating, the turntable shaft lower end are connected with gearbox.Driving motor is set to the axis immediately below adjustable speed turntable and gearbox
Heart position, motor transmission shaft are set in casing assembly by gearbox gear and turntable axis connection, driving motor route assembly
Between pressure casing body and airtight inner housing, by connecting line respectively with driving motor and the number being arranged in outside pressure casing body
Word formula casting manipulation unit is connected.Centrifugation control unit can be realized during multistage turbine rotor integral cast, protect
Cast and the casting high speed rotation above adjustable speed turntable are held, the horizontal centrifugal power for being much larger than gravity is generated, so that molten state is closed
Golden slurry can even into slit gap everywhere on the multistage turbine rotor blade mold circumference of high level of architectural complexity, from
And manufacture shaft and the integrated turbo blade of blade.
Further, the casing assembly is made of pressure casing body and airtight inner housing.Pressure casing body is big by rigidity
The strong special stainless steel of bearing capacity is made, and is the main pressure-containing member of the present apparatus, and internal includes airtight inner housing, Qi Bishang
Through being equipped with inner and outer shell gas exchanges mouth, airtight inner housing is good by air-tightness, good to micro-molecular gas barrier property and have
There are the polymer ceramic composites of certain mechanical strength to be made, runs through on wall and inner and outer shell gas exchanges mouth is installed.It is resistance to
Pressure outer housing mainly undertakes the air pressure difference of equipment inside and outside in Centrifugal Vacuum casting process, and accident can occur in contingency
In the case where protect the safety of operator as far as possible.Airtight inner housing is mainly used to prevent the small molecule gas of Environmental Trace
Body is spread since inside and outside immense pressure difference passes through stainless steel material interstitial void into mold die, it is ensured that the Centrifugal Vacuum
Casting process can carry out under high vacuum degree environment, guarantee miniature turbocompressor multistage turbine rotor monoblock cast
The extreme high purity of molten state alloy liquid slurry prevents the oxidation of alloy material, surface carbon in casting process to greatest extent
The generation of phenomena such as change.
Further, the casing assembly connects vacuum control component, and the vacuum control component includes vacuum pump, vacuum
Valve and the inner and outer shell gas exchanges mouth being connect with casing assembly.Vacuum subassembly can guarantee to be centrifuged control group in casting device
Part and digital casting controlling component are in the environment for being completely closed and reaching ideal vacuum degree, to effectively avoid
Due to the bubble that molten state alloy slurry is brought by volume gas in general centrifugal casting process, and can prevent various in external environment
Gas molecules diffuse into molten state alloy slurry, prevent the oxidation of alloy material, table in casting process to greatest extent
The generation for phenomena such as face is carbonized, so that the component perfusion that casting obtains is finer and close, uniform, structural strength is more stable, surface property
It is more excellent.
Further, which manipulates unit by the digital casting of its work of line connection control, digital
Casting manipulation unit is arranged outside pressure casing body, manipulates unit for Digital Programmable control, passes through casting and temperature control circuits
Assembly and device carry out circuit connection, and casting and temperature control circuits assembly are set to pressure casing body and airtight inner casing in casing assembly
Between body, one end by be drivingly connected line respectively with casting control pin, heating collecting ring brush and temperature sensing collecting ring brush
It is connected, itself passes through connecting line again and be connected with the digital casting manipulation unit being arranged in outside pressure casing body.Pass through
Digital casting manipulation unit is cast via casting and temperature control circuits assembly control gearbox and the procedural change of adjustable speed turntable
The centrifugal force size of different phase during making, realization orderly control its segregation to the alloy of different materials composition proportion, even
It can accomplish to orient gradient segregation, so as to realize that different functions is needed by the component difference for controlling blade different location
It asks: such as blade segregation aggregation higher alloy compositions of hardness in the middle part of wheel disc, and blade is poly- by the segregation of subapical part
Collection elasticity and the preferable alloy compositions of toughness etc..
Using the casting method of above-mentioned casting device, specifically comprise the following steps:
(1) make vacustat in casing assembly and reach casting condition requirement；
(2) opening digital casting controlling component melts preset alloy material, opens heating coil and preheats casting mold mould
To suitable cast temperature, starting is centrifuged control assembly and is adjusted to the revolving speed of needs tool；
(3) fused solution alloy material is cast to mold die, in this process, adjusts the size of current of heating coil,
Program temperature regulation is carried out, makes in mold die molten state alloy Slow cooling in gradient, forms high temperature alloy ordered crystalline；
(4) after temperature reduction, make casing assembly and atmosphere outside air pressure balance, device is out of service, that is, completes
Casting process.
Compared with prior art, which utilizes modularization thinking, will be centrifuged control assembly, vacuum control component, temperature
Control assembly, digital casting controlling component and shell combine.It is combined using high speed centrifugation and vacuum casting
Method is not easy uniformly to cause to form to solve internal cavity casting in miniature turbocompressor multistage turbine rotor casting process
The problems such as leaf product intensity is unstable.High vacuum state is kept by melting, casting process, turbine rotor can be effectively eliminated
Bubble, vapour lock existing for blade interior, phenomena such as being aoxidized existing for surface.It is high in the case where high speed rotation generates centrifugal force
The metal alloy of warm liquid can more completely be filled with blade mold gap, keep the condition of high temperature of casting mold in the process, have
It is eliminated under fluid state conducive to bubble, impurity.After casting basic forming, pass through digital casting controlling component and temperature control
The synergistic effect such as component processed, realizing molten state alloy, Slow cooling cools down in gradient, facilitates in integrated multistage turbine rotor
Orderly, fine and close, uniform metal lattice form is formed in casting, improves the firmness and toughness of casting.It is expected to solve existing
Miniature turbocompressor product quality especially intensity present in multistage turbine rotor casting process is unstable, rotor blade
It is more to realize that successfully casting obtains using with precision size, the good miniature turbocompressor of physical property for the problems such as ratio of defects is high
Grade turbine rotor.
The present invention is expected to solve the product present in existing miniature turbocompressor multistage turbine rotor casting process
The problems such as quality especially structural strength is unstable, rotor blade ratio of defects is high, realize successfully casting obtain with precision size,
The good miniature turbocompressor multistage turbine rotor of physical property, has the advantage that
1, the method for using high speed centrifugation and vacuum casting to combine is whole to solve turbocompressor multistage turbine rotor
Internal cavity casting is not easy uniformly to lead to problems such as formed blades product strength unstable in body casting process, also avoids turbine
The reconnection of axis and rotor blade is difficult, and cutting may be implemented or casting method is difficult to the miniature turbocompressor completed multistage
Turbine rotor is integrated.
2, in the case where high speed rotation generates centrifugal force, the metal alloy of high-temperature liquid state can more completely be filled with blade
Die clearance keeps the condition of high temperature of casting mold in the process, is conducive to bubble, impurity is eliminated under fluid state, Er Qiezhu
The high speed rotation that cast and casting assembly are kept during making rotates generated horizontal centrifugal power and is much larger than gravity, so that molten
The alloy slurry of change can even into slit everywhere on circumference, so that the component perfusion that casting obtains is finer and close, uniform, from
And manufacture shaft and the integrated multistage turbine rotor of blade.
3, it can guarantee that casting device melting, casting process are in one and are completely closed and reach by vacuum component
Carried out in the environment of ideal vacuum degree, can effectively avoid in general centrifugal casting process due to molten state alloy slurry because
The bubble that volume gas is brought into, and various gas molecules in external environment can be prevented to diffuse into molten state alloy slurry, it is maximum
Generation phenomena such as preventing the oxidation of alloy material, surface carbonation in casting process of limit.
4, it after casting basic forming, is acted synergistically by digital casting controlling component and temperature-controlling module etc., it is real
Slow cooling cools down existing molten state alloy in gradient, help to be formed in integrated multistage turbine rotor casting orderly, it is fine and close,
Uniform metal lattice form, improves the firmness and toughness of casting, to reach required by integrated multistage turbine rotor casting
The strength of materials.
5, it may be implemented orderly to control its segregation to different alloys by the centrifugal rotational speed in control casting process, even
It can accomplish to orient gradient segregation, realize different functional requirements so as to control the component difference of blade different location:
Such as blade segregation aggregation higher alloy compositions of hardness in the middle part of wheel disc, and blade is by subapical part segregation aggregation bullet
Property and the preferable alloy compositions of toughness etc..
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
In figure: 1- pressure casing body, the small-sized induction furnace of 2-, 3- casting control pin, 4- heating power supply and sensor,
5- mold die, 6- heating coil (showing section), 7- adjustable speed turntable, 8- heat collecting ring brush, 9- temperature sensing collection
Flow ring brush, 10- gearbox, 11- driving motor, 12- driving motor power supply line, 13- vacuum pump, the digital casting of 14-
Manipulate unit, 15- vacuum valve, 16- inner and outer shell gas exchanges mouth, 17- casting and temperature control circuits assembly, 18- driving electricity
The airtight inner housing of machine circuit assembly, 19-.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
A kind of Centrifugal Vacuum monoblock cast device of miniature turbocompressor multistage turbine rotor, such as Fig. 1, the device
Including centrifugation control assembly, vacuum control component, temperature-controlling module, digital casting controlling component and casing assembly.
Control assembly is centrifuged by adjustable speed turntable 7, gearbox 10, driving motor 11, driving motor power supply line 12 and driving
Motor route assembly 18 is constituted.Adjustable speed turntable includes the turntable of turntable shaft and its top support fixed casting mold and casting, master
Body is metal structure, and turntable upper top is coated with refractory ceramics coating, and gearbox is set to the axis immediately below adjustable speed turntable
Heart position, is directly connected to turntable shaft thereon, and driving motor is set to the shaft core position immediately below adjustable speed turntable and gearbox,
Motor transmission shaft is set to pressure casing in casing assembly by gearbox gear and turntable axis connection, driving motor route assembly
Between body and airtight inner housing, by connecting line respectively with driving motor and the digital casting being arranged in outside pressure casing body
Manipulation unit is connected.
Vacuum control component is made of vacuum pump 13, vacuum valve 15 and inner and outer shell gas exchanges mouth 16.Vacuum control group
Part can guarantee to be centrifuged control assembly in casting device and digital casting controlling component is in one and is completely closed and reaches
The environment of ideal vacuum degree, to effectively avoid in general centrifugal casting process since molten state alloy slurry is because of volume gas band
The bubble entered, and various gas molecules in external environment can be prevented to diffuse into molten state alloy slurry, to greatest extent
The generation for phenomena such as preventing the oxidation of alloy material, surface carbonation in casting process, the component perfusion for obtaining casting more cause
Close, uniform, structural strength is more stable, and surface property is more excellent.
Temperature-controlling module is by heating power supply and sensor 4, heating coil 6, heating collecting ring brush 8 and temperature sensing collection
It flows ring brush 9 to form, wherein temperature sensing collecting ring brush 9 and heating collecting ring brush 8 is in rotary parts and stationary parts
Between conduct electric current common components.Heating power supply and sensor are set to the shaft core position immediately below small-sized induction furnace, use
Temperature sensing-feedback loop controls the heating power of small-sized induction furnace, and heating coil is located above adjustable speed turntable, annularly buries
Inner side and lower section set on mold die heat collecting ring brush: the shaft core position being set to immediately below adjustable speed turntable,
It covers on turntable shaft, while being connected with conducting wire with casting and temperature control circuits assembly, temperature sensing collecting ring brush is set to can
The shaft core position immediately below turntable is adjusted the speed, heating collecting ring brush lower section covers on turntable shaft, while with conducting wire and casting and temperature
Control route assembly is connected.
Digital casting controlling component is manipulated by small-sized induction furnace 2, casting control pin 3, mold die 5, digital casting
Unit 14 and casting and temperature control circuits assembly 17 form, and small-sized induction furnace 2 is located at the topmost central location of airtight inner housing 19,
The casting in mold die 5 in the bottom is heated using electromagnetic induction principle, casting control pin 3 is located at small-sized sense
The lower section of furnace is answered, the top of mold die 5 is connected with casting and temperature control circuits assembly by being drivingly connected route, is arranged
Digital casting controlling component manipulation outside pressure casing body, controls the casting process of aluminium alloy；Mold die 5 is located at small
The lower section of type induction furnace 2 and control pin 3 of casting, mold die 5 are integrally fastened to adjustable speed turntable upper center position, casting and
Temperature control circuits assembly 17 is set in casing assembly between pressure casing body 1 and airtight inner housing 19, and one end passes through drive connection
Line is connected with casting control pin 3, heating collecting ring brush 8 and temperature sensing collecting ring brush 9 respectively, itself passes through connection again
Line is connected with the digital casting manipulation unit 14 being arranged in outside pressure casing body 1.
Casing assembly is made of pressure casing body 1 and airtight inner housing 19, and pressure casing body is strong by the big bearing capacity of rigidity
Special stainless steel be made, be the main pressure-containing member of the present apparatus, internal includes airtight inner housing, through being equipped on wall
Inner and outer shell gas exchanges mouth, airtight inner housing is good by air-tightness, good to micro-molecular gas barrier property and have certain mechanics
The polymer ceramic composites of intensity are made, and run through on wall and are equipped with inner and outer shell gas exchanges mouth.
By the present apparatus be particularly applicable in certain type unmanned plane micro turbine engine multistage compressor turbine rotor from
Core type vacuum monoblock cast, detailed process is as follows:
Vacuum pump 13, vacuum valve 15 and inner and outer shell are successively opened by Digital Programmable control casting manipulation unit first
Gas exchanges mouth 16 to the vacustat inside airtight inner housing 19 and reaches Centrifugal Vacuum casting condition requirement.Then
Unit 14 is manipulated by digital casting to control via casting and temperature control circuits assembly 17, opens heating power supply 4 and small-sized induction
Furnace 2 is preheated, so that nickel-base high-temperature IN718 alloy Ni preset in small-sized induction furnace 23The melting of AlTi reinforcing material；Simultaneously
Open the synchronous preheating multistage compressor wheel rotor mold die 5 of heating coil 6.Unit 14 is then manipulated by digital casting
Driving motor 11 is opened via driving motor route assembly 18, and adjustable speed turntable 7 is adjusted to centrifugal true by gearbox 10
Suitable rotational speed required for empty monoblock cast.
Airtight 19 internal pressure of inner housing of apparatus system to be confirmed, centrifugal rotational speed, temperature are stablized, and guarantee small-sized induction furnace
After alloy feed liquid is uniformly melted under the conditions of vacuum protection in 2, confirm that the mold die 5 on adjustable speed turntable 7 is also preheated to
After suitable cast temperature, manipulating the manipulation casting control pin 3 of unit 14 by digital casting will be molten in small-sized induction furnace 2
Alloy liquid is cast into mold die 5, by further adjusting vacuum degree and centrifugation rate, makes molten state nickel-base high-temperature
IN718 alloy liquid slurry is well into multistage compressor turbine rotor casting mold 5.
During molten state nickel-base high-temperature IN718 alloy liquid slurry enters mold die 5, number is continued through
Formula casting manipulation unit 14 utilizes temperature sensing collecting ring brush 9 and heating collecting ring via casting and temperature control circuits assembly 17
Brush 8 adjusts the size of current for passing through heating coil 6, to carry out program temperature regulation, realizes the molten state in mold die 5
The slowly controlled cooling in gradient of nickel-base high-temperature IN718 alloy forms orderly, cause in multistage compressor turbine rotor cast-internal
Close, the microcosmic lattice form of homogeneous metal, while making blade nearly spindle portion segregation aggregation hardness in the middle part of wheel disc higher
Alloy compositions containing Ni, and blade preferably contains Ni by subapical part segregation aggregation elasticity and toughness3AlTi enhances alloy group
Point, promote the performance of entire micro turbine engine multistage compressor turbine rotor.To the end of Programmed freezing process, high temperature is closed
The ordered crystalline forming process of gold is also completed therewith.
After the completion of casting process, small-sized induction furnace 2, heating are successively closed finally by digital casting manipulation unit 14
Coil 6, heating power supply and sensor 4；After system temperature is reduced to 30 degree of room temperature or more, vacuum pump 13 is turned off, is opened true
Empty valve 15 and inner and outer shell gas exchanges mouth 16, so that pressure casing body 1 and airtight inner housing 19 and atmosphere outside air pressure
Balance closes driving motor 11 at this time and adjustable speed turntable 7 is slowly stopped operating, can take out multistage compressor whirlpool obtained
Submodule tool is rotated, so that a step realizes the Centrifugal Vacuum monoblock cast of micro turbine engine multistage compressor turbine rotor
Process.
Those of ordinary skill in the art it should be appreciated that more than specific embodiment be intended merely to illustrate this
Patent of invention, and being not used as the restriction to the invention patent, if in the spirit of the invention patent, to
Variation, the modification of the upper specific embodiment will all be fallen in the Claims scope of the invention patent.
Claims (9)
1. a kind of casting device of miniature turbocompressor multistage turbine rotor, casing assembly including vacuum-pumping is set to
Mold die is arranged in the centrifugation control assembly in centrifugation control assembly and digital casting controlling component in casing assembly
(5), the digital casting controlling component is located above mold die (5), which is characterized in that sets in the mold die (5)
There is the heating coil (6) for carrying out program temperature regulation to it, makes the interior molten state alloy of mold die (5) Slow cooling in gradient.
2. a kind of casting device of miniature turbocompressor multistage turbine rotor according to claim 1, feature exist
In the heating coil (6) and digital casting controlling component connect temperature-controlling module, including even with heating coil (6)
The temperature sensing collecting ring brush (9) connect and heating collecting ring brush (8), and what is connect with digital casting controlling component add
Thermoelectric generator and sensor (4).
3. a kind of casting device of miniature turbocompressor multistage turbine rotor according to claim 1, feature exist
In the digital casting controlling component includes for the small-sized induction furnace (2) of melted alloy material and for controlling melting
Alloy enters the casting control pin (3) of mold die (5) from small-sized induction furnace (2).
4. a kind of casting device of miniature turbocompressor multistage turbine rotor according to claim 1, feature exist
In the centrifugation control assembly includes adjustable speed turntable (7), the gearbox (10) for being connected to adjustable speed turntable (7) lower part and drives
Dynamic motor (11), driving motor (11) are connect by driving motor power supply line (12) with driving motor route assembly (18).
5. a kind of casting device of miniature turbocompressor multistage turbine rotor according to claim 4, feature exist
In, the adjustable speed turntable (7) includes the turntable of turntable shaft He its top support mold die (5), and main body is metal structure,
Turntable upper top is coated with refractory ceramics coating, and the turntable shaft lower end is connected with gearbox.
6. a kind of casting device of miniature turbocompressor multistage turbine rotor according to claim 1, feature exist
In the casing assembly is made of pressure casing body (1) and airtight inner housing (19).
7. a kind of casting device of miniature turbocompressor multistage turbine rotor according to claim 1, feature exist
Connect vacuum control component in, the casing assembly, the vacuum control component include vacuum pump (13), vacuum valve (15) and
The inner and outer shell gas exchanges mouth (16) being connect with casing assembly.
8. according to a kind of described in any item casting devices of miniature turbocompressor multistage turbine rotor of claim 7,
It is characterized in that, which manipulates unit (14) by the digital casting of its work of line connection control.
9. a kind of casting method of miniature turbocompressor multistage turbine rotor, which is characterized in that using such as claim 1 institute
The casting device stated, specifically comprises the following steps:
(1) make vacustat in casing assembly and reach casting condition requirement；
(2) opening digital casting controlling component melts preset alloy material, opens heating coil (6) and preheats mold die
(5) to suitable cast temperature, starting centrifugation control assembly and the revolving speed for being adjusted to needs；
(3) fused solution alloy material is cast to mold die (5), in this process, the electric current for adjusting heating coil (6) is big
It is small, program temperature regulation is carried out, makes in mold die (5) molten state alloy Slow cooling in gradient, ties high temperature alloy orderly
Crystalline substance molding；
(4) after temperature reduction, make casing assembly and atmosphere outside air pressure balance, device is out of service, and completion was cast
Journey.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810989543.9A CN108941497A (en) | 2018-08-28 | 2018-08-28 | The casting device and casting method of miniature turbocompressor multistage turbine rotor |
Applications Claiming Priority (1)
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| CN115351257A (en) * | 2022-07-30 | 2022-11-18 | 西安诺博尔稀贵金属材料股份有限公司 | Centrifugal casting mold and centrifugal casting method for Ni-based alloy pipe |
| CN117483694A (en) * | 2024-01-02 | 2024-02-02 | 山西昌达盛精密铸造有限公司 | High-chromium alloy centrifugal pipe casting machine and use method thereof |
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Application publication date: 20181207 |