CN107127323B - A kind of method and apparatus that ceramic core depoling efficiency can be improved - Google Patents
A kind of method and apparatus that ceramic core depoling efficiency can be improved Download PDFInfo
- Publication number
- CN107127323B CN107127323B CN201710445566.9A CN201710445566A CN107127323B CN 107127323 B CN107127323 B CN 107127323B CN 201710445566 A CN201710445566 A CN 201710445566A CN 107127323 B CN107127323 B CN 107127323B
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- CN
- China
- Prior art keywords
- chamber
- clear water
- lye
- depoling
- reaction chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/001—Removing cores
- B22D29/002—Removing cores by leaching, washing or dissolving
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/001—Removing cores
- B22D29/003—Removing cores using heat
Abstract
The invention discloses a kind of method and apparatus that ceramic core depoling efficiency can be improved.Firstly, this method is to use lye as depoling liquid, and use medium of the clear water as periodic cleaning depoling product.Equipment using this method includes lye chamber, clear water chamber, reaction chamber and pressure pocket, lye is sucked back into lye chamber after being first passed into reaction chamber reaction a period of time by vacuum air pump by lye when work, clear water is passed through reaction chamber again, clear water acutely boils at this time, cleaning is attached to the depoling product of whose surfaces by boiling scouring force, then clear water is sucked back into clear water chamber and lye is passed through reaction chamber again, repeated the above steps until the removing of type core is clean.Pressure is kept constant by voltage stabilizing air pump in this kind of device systems.Since, without pressure difference, wall thickness reduces and the safety is improved inside and outside reaction chamber；Since periodically the depoling product of whose surfaces can be washed away in time by being passed through clear water, depoling rate is greatly improved, the removing of any labyrinth ceramic core is applicable to.
Description
Technical field
The invention belongs to hollow turbine vane ceramic core fast eliminating technical fields, and in particular to ceramics can be improved in one kind
The method and apparatus of type core depoling efficiency, suitable for the hollow turbine vane alumina based ceramic core with complicated inner cavity structure
Fast eliminating.
Background technique
Modern aeroengine and gas turbine are all made of hollow turbine vane, and turbo blade operating temperature is high, it is necessary to
Meet operating temperature requirements by optimizing internal coolant flow channel, so the cooling duct inside hollow turbine vane is more and more multiple
It is miscellaneous.For shaping blade inside labyrinth cooling duct, need to manufacture and use the ceramic core with corresponding labyrinth.Mesh
Before, ceramic core material is mainly aluminium oxide and silica, and compared with silica fundamental mode core, alumina based ceramic core has more
High high temperature creep resistance, and do not react with high-temperature liquid metal, therefore in high-temperature alloy blades casting process of new generation
In be used widely.
Currently, the mainstream depoling method for alumina based ceramic core is normal pressure soda boiling depoling.But due to aluminium oxide
Chemical stability it is high, depoling rate is slower under the conditions of normal pressure soda boiling.High temperature and pressure depoling is raising type core removing rate
A kind of effective ways, but depoling reaction product can often be attached to whose surfaces obstruction depoling reaction in high temperature and pressure
Further progress.Therefore, research can remove the high temperature and pressure depoling method of depoling reaction product and equipment automatically has important meaning
Justice.
Summary of the invention
The object of the present invention is to provide a kind of method and apparatus that can improve ceramic core depoling efficiency.
In order to achieve the above objectives, the present invention adopts the following technical scheme that realize:
A kind of equipment that ceramic core depoling efficiency can be improved, including pressure pocket, lye chamber and clear water chamber；Wherein,
The reaction chamber for placing hollow turbine vane is provided in pressure pocket, lye chamber and clear water chamber are arranged at pressure-bearing
The top of chamber, lye chamber are connected with reaction chamber, for providing and the depoling liquid in abstraction reaction chamber, clear water chamber and reaction chamber phase
Connection, for providing and the clear water in abstraction reaction chamber；Coupled logical voltage stabilizing air pump is additionally provided with outside pressure pocket.
A further improvement of the present invention lies in that depoling liquid is lye, mass concentration range is 50%~70%.
It is formulated a further improvement of the present invention lies in that lye is dissolved in water by KOH.
A further improvement of the present invention lies in that the type core in hollow turbine vane is alumina based ceramic core, hollow vortex
The size of impeller blade is 50mm~250mm.
A further improvement of the present invention lies in that further include vacuum air pump, by solenoid directional control valve respectively with lye chamber and
Clear water chamber is connected.
A further improvement of the present invention lies in that being provided with lye chamber electromagnetism on the pipeline that lye chamber is connected with reaction chamber
Valve is provided with clear water chamber solenoid valve on the pipeline that clear water chamber is connected with reaction chamber.
A further improvement of the present invention lies in that being additionally provided with venting solenoid valve on the side wall of pressure pocket.
A further improvement of the present invention lies in that the pipeline connected between reaction chamber, lye chamber and clear water chamber and three cavitys
It is made of the strong monel alloy of resistance to alkali liquid corrosion, to guarantee work longevity of the three under high-temperature high concentration lye operating condition
Life.
A further improvement of the present invention lies in that the bottom of reaction chamber is provided with the pipeline phase with lye chamber and clear water chamber lower part
The groove of cooperation.
A method of ceramic core depoling efficiency can be improved, this method, which is based on above-mentioned one kind, can be improved ceramic core depoling
The equipment of efficiency, comprising the following steps:
1) depoling liquid is passed into reaction chamber and is heated to specified for temperature ranges first, the pressure in pressure pocket is maintained
Within the specified range；
2) after the type core of depoling liquid and hollow turbine vane reaction a period of time, pressure release is carried out to pressure pocket, by depoling liquid
Extract and be passed through clear water out, the depoling reaction product of whose surfaces is washed away in clear water boiling；
3) clear water is extracted out, lye is passed through in reaction chamber, and pressure-bearing cavity pressure is increased in specified range again；
4) it repeats the above steps until the type core removing of hollow turbine vane is clean.
The present invention has the advantage that:
A kind of equipment that ceramic core depoling efficiency can be improved provided by the invention, can be realized the fast eliminating of type core,
This is because the present invention leans on the molten stall rate of high temperature alkaline solution raising type core, by clear by being alternately passed through high temperature alkaline solution and clear water automatically
The boiling power of water removes the depoling product for being attached to whose surfaces, eliminates showing for reaction rate reduction caused by depoling product covers
As.The present invention can shorten the idle work time during conventional high-temperature high-pressure process depoling, improve depoling work efficiency, this be because
Eliminate for the present invention needs to take out blade to clear up depoling product after reacting a period of time in conventional high temperature high pressure depoling method
Work.The safety of equipment operation can be improved in the present invention, this is because holding on the inside of reaction chamber during conventional high-temperature high pressure depoling
By elevated pressures, simultaneous reactions chamber is by alkali liquid corrosion, its safety after reacting cavity wall and generating defect during long-term corrosion
Property reduce；And the design scheme that the present invention uses pressure pocket to separate with reaction chamber, only inner wall bears pressure but does not contact pressure pocket
Lye, because without generating defect because of corrosion, therefore pressure pocket safety is guaranteed；Even and if reaction chamber because contact lye by
Damage, but balanced since its bilateral is pressurized, it eliminates in conventional high temperature high pressure depoling equipment because unilateral be pressurized in reaction chamber inside causes
Potential reaction cavity explosion etc. security risks.
Further, depoling liquid of the invention uses the lye of high-temperature high concentration, is able to achieve lye and the fast reaction of type core, this
It is because lye and type core reaction speed are very fast in the case of high-temperature high concentration.
Further, present invention mainly solves the removing problems of alumina based ceramic core, this is because alumina type core
It is high to learn stability, removing is difficult.
Further, the present invention can be achieved lye and clear water and periodically replace to be passed through in reaction chamber, alternate intervals and accordingly move
Work can be completed with external controller, corresponding solenoid valve and vacuum air pump.
Further, pressure pocket is provided with venting solenoid valve in the present invention, and automatic shutter movement is carried out by external controller
Control, it is corresponding with the period that lye and clear water are passed through, to guarantee circulation smoothly, and cooperates with voltage stabilizing air pump and guarantee that depoling is reacted
When system in pressure.
Further, reaction chamber, clear water chamber and the lye chamber in the present invention are all made of the manufacture of monel metal material, it is ensured that
Working life of the three under high-temperature high concentration lye operating condition, this is because monel metal has stronger high temperature resistant and alkaline-resisting
Corrosion ability.
Further, the present invention more can thoroughly aspirate lye or clear water in lye-clear water alternating cyclical process, this
It is to guarantee suction later period lye because the bottom of reaction chamber offers the groove matched with clear water chamber and lye chamber lower pipeline
Or clear water is collected to groove location, to realize that lye or clear water are more thoroughly aspirated completely.
A kind of method that ceramic core depoling efficiency can be improved provided by the invention, will first be placed on reaction to depoling blade
In chamber, and the lye in lye chamber is passed through in reaction chamber, followed by the heating furnace silk being wrapped in outside reaction chamber to whole
A system is heated, and after reaching assigned temperature, the pressure in external voltage stabilizing air pump regulating system makes pressure be maintained at finger
Determine in range, the reaction of depoling at this time starts to carry out.After reacting a period of time, venting solenoid valve is opened to let out to system
Pressure, and it is intracavitary by vacuum air pump and corresponding electromagnetic valve linking lye to be sucked back into lye, and clear water is then passed into reaction chamber
In, clear water is in fluidized state at this time, the depoling reaction product of whose surfaces is washed away by its power of boiling, so that new whose surfaces
It is exposed.Then clear water is sucked back into clear water chamber and is passed through lye again, circulation above-mentioned steps are for several times until ceramic core is de-
Except clean.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
In figure: 1, solenoid directional control valve；2, vacuum air pump；3, lye chamber；4, lye chamber solenoid valve；5, venting solenoid valve；6,
Pressure pocket；7, voltage stabilizing air pump；8, reaction chamber；9, clear water chamber solenoid valve；10, clear water chamber.
Specific embodiment
The present invention will be further described in detail below with reference to the embodiments, following embodiment be explanation of the invention and
The invention is not limited to following embodiments.
Embodiment:
As shown in Figure 1, a kind of method and apparatus that can improve ceramic core depoling efficiency proposed by the present invention, wherein equipment
It include: solenoid directional control valve 1, vacuum air pump 2, lye chamber 3, lye chamber solenoid valve 4, venting solenoid valve 5, pressure pocket 6, voltage stabilizing air pump
7, reaction chamber 8, clear water chamber solenoid valve 9 and clear water chamber 10, specific structure is as follows:
1) pressure resistant vessel is pressure pocket 6, and cavity is provided with gas vent and venting solenoid valve 5, and top is uncapped desirable foliation piece；
Pressure pocket 6 is connected to voltage stabilizing air pump 7.
2) reaction chamber 8 is placed in pressure pocket 6, and there is at two groove in 8 bottom of reaction chamber respectively and under clear water chamber 10 and lye chamber 3
Pipeline match, be provided with heating furnace silk to reaction chamber 8 for the liquid feed in reaction chamber 8 to be blotted only, outside reaction chamber 8
It is heated.
3) clear water chamber 10 and lye chamber 3, two cavity bottoms are arranged on pressure pocket 6 has pipeline to be passed through reaction chamber 8
In the corresponding groove in bottom, lye chamber solenoid valve 4 and clear water chamber solenoid valve 9 are respectively arranged on two pipelines；10 He of clear water chamber
3 top of lye chamber is connect with vacuum air pump 2, for extracting the liquid in respective cavity.
When work, it will first place in the reactor chamber, and the lye in lye chamber is passed through in reaction chamber, connect to depoling blade
Get off and whole system is heated by being wrapped in the heating furnace silk outside reaction chamber, after reaching assigned temperature, by external
Pressure in voltage stabilizing air pump regulating system keeps pressure within the specified range, and the reaction of depoling at this time starts to carry out.One section of reaction
After time, venting solenoid valve is opened to carry out pressure release to system, and passes through vacuum air pump and corresponding electromagnetic valve linking for lye
It is intracavitary to be sucked back into lye, then clear water is passed into reaction chamber, clear water is in fluidized state at this time, washes away type by its power of boiling
The depoling reaction product of wicking surface, so that new whose surfaces are exposed.Then clear water is sucked back into clear water chamber and led to again
Enter lye, circulation above-mentioned steps are for several times until ceramic core removing is clean.
It is a specific embodiment below.
1) certain model blade to depoling is placed into reaction chamber 8, is injected separately into clear water chamber 10 and lye chamber 3 clear
The aqueous alkali of water and 70% mass concentration, then seals equipment.
2) lye chamber solenoid valve 4 is opened, solenoid directional control valve 1 is adjusted, is passed through the lye in lye chamber 3 in reaction chamber 8, beats
Heating and voltage stabilizing air pump 7 are opened, is maintained at system pressure within the scope of 3 ± 0.5MPa.
3) after temperature in system is raised to 380 DEG C, start to keep the temperature, after reaction 3 hours, close voltage stabilizing air pump 7 and open and put
Pneumoelectric magnet valve 5 carries out pressure release to system, is then all sucked back the lye in reaction chamber 8 in lye chamber 3 by vacuum air pump 2；It connects
Get off to close lye chamber solenoid valve 4, while solenoid directional control valve 1 being made to commutate, opens clear water chamber solenoid valve 9, clear water is made to be passed through reaction
In chamber 8, clear water can acutely boil at this time, and boiling power can wash away the depoling reaction product that ceramic core surface covers completely；10
Clear water is sucked back into clear water chamber 10 after minute, closes clear water chamber solenoid valve 9, solenoid directional control valve 1 is then made to commutate, opens lye
Chamber solenoid valve 4 is passed through lye again in reaction chamber 8, and closing venting solenoid valve 5 and opening voltage stabilizing air pump 7 makes system pressure again
Secondary to return to specified pressure range and keep constant, depoling reaction continues.
4) it repeats the above steps, until ceramic core is totally removed completely, to system decompression, cooling then takes out blade
?.
Claims (5)
1. a kind of method that ceramic core depoling efficiency can be improved, which is characterized in that this method, which is based on one kind, can be improved ceramic mould
The equipment of core depoling efficiency, the equipment include pressure pocket (6), lye chamber (3) and clear water chamber (10)；Wherein, it is set in pressure pocket (6)
It is equipped with the reaction chamber (8) for placing hollow turbine vane, lye chamber (3) and clear water chamber (10) are arranged at pressure pocket (6)
Top, lye chamber (3) are connected with reaction chamber (8), for providing and the depoling liquid in abstraction reaction chamber (8), clear water chamber (10)
It is connected with reaction chamber (8), for providing and the clear water in abstraction reaction chamber (8)；It is additionally provided with outside pressure pocket (6) coupled
Logical voltage stabilizing air pump (7)；
Depoling liquid is lye, and mass concentration range is 50%~70%；
Further include vacuum air pump (2), is connected respectively with lye chamber (3) and clear water chamber (10) by solenoid directional control valve (1)；Alkali
Lye chamber solenoid valve (4), clear water chamber (10) and reaction chamber (8) phase are provided on the pipeline that sap cavity (3) is connected with reaction chamber (8)
Clear water chamber solenoid valve (9) are provided on the pipeline of connection；Venting solenoid valve (5) are additionally provided on the side wall of pressure pocket (6)；The party
Method the following steps are included:
1) depoling liquid is passed into reaction chamber (8) and after being heated to 380 DEG C first, the pressure in pressure pocket (6) is maintained 3
In ± 0.5MPa；
2) after the type core of depoling liquid and hollow turbine vane reaction a period of time, pressure release is carried out to pressure pocket (6), depoling liquid is taken out
Out and it is passed through clear water, the depoling reaction product of whose surfaces is washed away in clear water boiling；
3) clear water is extracted out, lye is passed through in reaction chamber (8), and pressure pocket (6) interior pressure is increased to specified range again
It is interior；
4) it repeats the above steps until the type core removing of hollow turbine vane is clean.
2. a kind of method that ceramic core depoling efficiency can be improved according to claim 1, which is characterized in that lye by
KOH is dissolved in water and is formulated.
3. a kind of method that ceramic core depoling efficiency can be improved according to claim 1, which is characterized in that hollow turbine
Type core in blade is alumina based ceramic core, and the size of hollow turbine vane is 50mm~250mm.
4. a kind of method that ceramic core depoling efficiency can be improved according to claim 1, which is characterized in that reaction chamber
(8), the pipeline connected between lye chamber (3) and clear water chamber (10) and three cavitys is closed by the strong Meng Naier of resistance to alkali liquid corrosion
Gold is made, to guarantee working life of the three under high-temperature high concentration lye operating condition.
5. a kind of method that ceramic core depoling efficiency can be improved according to claim 1, which is characterized in that reaction chamber
(8) bottom is provided with the groove matched with the pipeline of lye chamber (3) and clear water chamber (10) lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710445566.9A CN107127323B (en) | 2017-06-13 | 2017-06-13 | A kind of method and apparatus that ceramic core depoling efficiency can be improved |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710445566.9A CN107127323B (en) | 2017-06-13 | 2017-06-13 | A kind of method and apparatus that ceramic core depoling efficiency can be improved |
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| CN107127323A CN107127323A (en) | 2017-09-05 |
| CN107127323B true CN107127323B (en) | 2019-10-11 |
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| CN201710445566.9A Expired - Fee Related CN107127323B (en) | 2017-06-13 | 2017-06-13 | A kind of method and apparatus that ceramic core depoling efficiency can be improved |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107855503A (en) * | 2017-10-31 | 2018-03-30 | 西安交通大学 | A kind of depoling equipment that alumina based ceramic core removing speed is improved by airflow stirring |
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| SU470365A1 (en) * | 1974-01-07 | 1975-05-15 | Московский Машиностроительный Завод "Салют" | Installation for cleaning castings from ceramics |
| SU872024A1 (en) * | 1980-01-04 | 1981-10-15 | Предприятие П/Я Р-6209 | Unit for cleaning castings off ceramics |
| JP2763845B2 (en) * | 1992-11-10 | 1998-06-11 | 株式会社東海理化電機製作所 | Cleaning equipment |
| JP2000288689A (en) * | 1999-04-07 | 2000-10-17 | Nissan Motor Co Ltd | Method for removing ceramic mold for shell mold |
| JP4600151B2 (en) * | 2005-05-24 | 2010-12-15 | トヨタ自動車株式会社 | Method for removing molten salt core |
| US8091610B2 (en) * | 2008-07-02 | 2012-01-10 | Pcc Airfoils, Inc. | Method and apparatus for removing core material |
| JP2011167672A (en) * | 2010-02-22 | 2011-09-01 | Seiko Epson Corp | Method for cleaning droplet discharge apparatus |
| CN103252477B (en) * | 2012-02-15 | 2015-06-10 | 中国科学院金属研究所 | Efficient ceramic core removal device for hollow blade |
| CN103143526B (en) * | 2012-12-25 | 2015-03-25 | 中国神华能源股份有限公司 | Locomotive bogie cleaning equipment |
| US20150174653A1 (en) * | 2013-12-19 | 2015-06-25 | United Technologies Corporation | System and methods for removing core elements of cast components |
| CN103752810B (en) * | 2014-01-07 | 2016-05-11 | 西安欧中材料科技有限公司 | A kind of method and special equipment thereof that removes alumina based ceramic core |
| CN103894363B (en) * | 2014-03-19 | 2016-09-14 | 江苏益科热处理设备有限公司 | A kind of biliquid well formula cleaning machine with gas floatation separation device |
| CN204892918U (en) * | 2015-08-28 | 2015-12-23 | 秦皇岛市宇田科技有限公司 | Novel energy -conserving depoling cauldron |
| CN106583695B (en) * | 2015-10-14 | 2018-10-02 | 沈阳铸造研究所有限公司 | A kind of alumina based ceramic core high temperature and pressure core-removing device and depoling method |
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