CN109175305A - A kind of pump vane casting technique and impeller - Google Patents
A kind of pump vane casting technique and impeller Download PDFInfo
- Publication number
- CN109175305A CN109175305A CN201811191214.6A CN201811191214A CN109175305A CN 109175305 A CN109175305 A CN 109175305A CN 201811191214 A CN201811191214 A CN 201811191214A CN 109175305 A CN109175305 A CN 109175305A
- Authority
- CN
- China
- Prior art keywords
- casting
- impeller
- shell
- pressure
- pump vane
- 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.)
- Pending
Links
- 238000005266 casting Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 29
- 239000000919 ceramic Substances 0.000 claims abstract description 27
- 239000011162 core material Substances 0.000 claims description 21
- 239000006260 foam Substances 0.000 claims description 16
- 238000012856 packing Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 229910052573 porcelain Inorganic materials 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 238000011049 filling Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 244000035744 Hura crepitans Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to casting technology fields, in particular to a kind of pump vane casting technique and its impeller, a kind of pump vane casting technique, comprising: use type core model casting shell of impeller；The type core of shell of impeller when type core in the model casting step is used as the pump vane casting；The shell of impeller forms the impeller with low-pressure casting process, a kind of impeller, impeller is cast using above-mentioned casting technique, impeller in the present invention is combined by ceramic mold casting, model casting and low pressure casting, molten metal fills insufficient problem during being able to solve pump vane casting, reduces the generation of impeller stomata, loose phenomenon.
Description
Technical field
The present invention relates to casting technology fields, in particular to a kind of pump vane casting technique and impeller.
Background technique
Centrifugal compressor or centrifugal pump are used to provide pressurization for the flowing of various fluids.This compressor or centrifugal pump include
Impeller, when the impeller is rotated, fluid axial direction enter, and then accelerate into circumferential direction and radial direction, and high flow rate fluid enters
Diffuser exports high-pressure fluid after converted speed, and to such compressor or centrifugal pump, used impeller is generally alloy essence
Close casting large-scale thin-walled impeller.
It is easy to appear the defects of filling is insufficient when traditional gravity forging type casting impeller, is limited by shell structure, type
Shell itself bear pressure it is limited, impeller casting be easy to produce stomata, it is loose the problems such as.
Summary of the invention
The purpose of the present invention is to provide a kind of pump vane casting technique and impellers, are able to solve gold during pump vane casting
Belong to liquid and fill insufficient problem, reduces the generation of impeller stomata, loose phenomenon.
The embodiment of the present invention is achieved in that
A kind of pump vane casting technique, comprising:
Using type core model casting shell of impeller；
The type core of shell of impeller when type core in the model casting step is used as the pump vane casting；
The shell of impeller forms the impeller with low-pressure casting process.
Preferably, above-mentioned shell of impeller has positioned at the main running channel of wheel hub bottom and positioned at the wheel hub and wheel cap connection position
The cross gate set.
Preferably, in above-mentioned low-pressure casting process casting pressure curve be divided into a liter liquid stage, fill the type stage, pressurization stages and
Packing stage.
Preferably, in the pressurization stages, when solid film occurs in the molten metal of shell cavity wall contact, enter
Packing stage.
Preferably, above-mentioned pressurization stages pressure is 1.5 times -2 times for filling type staged pressure.
Preferably, in the packing stage, dwell pressure 0.08Mpa-0.12Mpa, dwell time 4min-
5min。
Preferably, above-mentioned low-pressure casting process includes low-pressure casting apparatus, and the low-pressure casting apparatus uses foamed ceramics
Filter filtering enters the molten metal in the shell of impeller.
Preferably, above-mentioned low-pressure casting apparatus includes the stalk for conveying molten metal into shell of impeller, the bubble
The inlet of the stalk is arranged in foam ceramic filter.
Preferably, above-mentioned ceramic foam filter is inclined relative to horizontal setting.
Preferably, above-mentioned type core material is ceramics.
A kind of impeller, the impeller are cast using above-mentioned casting technique.
The beneficial effect of the embodiment of the present invention is:
Using low-pressure casting process casting impeller, shell of impeller when the type core in model casting step is used as pump vane casting
Type core, make molten metal under the action of gas pressure smoothly full of shell of impeller, it is insufficient effectively to solve molten metal filling
Defect is conducive to the formation of castings crystallization.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is low-pressure casting apparatus structural schematic diagram of the present invention.
Wherein: 1- crucible；2- stalk；3- filter；4- shell.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
Embodiment 1:
The present embodiment provides a kind of pump vane casting techniques, comprising:
Using ceramic core model casting shell of impeller 4；
4 manufacturing process of shell: making shell 4 using ceramic core fusible pattern, will integrally be put into after the cleaning of ceramic core fusible pattern
It is stained with rotation in pulper equipment and is stained with coating, then protrude into the ceramic core fusible pattern of uniform coating on the felt of surface in sand sprinkling machine equipment
Multi-direction overturning makes ceramic core fusible pattern surface uniformly be covered with one layer of zircon sand；Repetition is stained with slurry, stucco, drying process until molten
Mould has at least four layers of zircon sand, and then this ceramic core fusible pattern is put into heating furnace and is heated, and obtains inner cavity after fusing dewaxing and includes
The shell 4 of ceramic core；
The type core of shell of impeller 4, shell of impeller 4 are cast when type core in model casting step is used as pump vane casting with low pressure
It makes technique and forms impeller, the type core material in the present embodiment is ceramics, and the structure that the presence of ceramic core improves shell 4 is strong
Degree, higher pressure can be born in casting, is conducive to the formation of castings crystallization.
Shell of impeller 4 has the main running channel of corresponding wheel hub bottom and the cross gate of wheel hub and wheel cap link position, molten metal
Steady from the injection molten metal flowing of the main running channel of wheel hub bottom, cross gate is small to the impact of shell 4 and venting quality is good, after molding
Impeller be not likely to produce stomata and impurity.
Casting pressure curve is divided into a liter liquid stage, fills type stage, pressurization stages and packing stage in low-pressure casting process,
In pressurization stages, when solid film occurs in the molten metal of 4 cavity wall of shell contact, into packing stage, pressurization stages pressure is
1.5 times -2 times for filling type staged pressure, in packing stage, dwell pressure 0.08Mpa-0.12Mpa, the dwell time is
4min-5min, molten metal are solidified from edge to master, cross gate in shell 4, are from top to bottom solidified, dwell pressure advantageous metal
Crystallization, molten metal can effectively fill in shell 4, reduce molten metal and fill insufficient phenomenon generation.
Low-pressure casting process includes low-pressure casting apparatus, and low-pressure casting apparatus enters leaf using ceramic foam filter filtering
The molten metal in shell 4 is taken turns, low-pressure casting apparatus includes the stalk 2 for conveying molten metal into shell of impeller 4, foam pottery
The inlet of stalk 2 is arranged in porcelain filter, and ceramic foam filter is inclined relative to horizontal setting, sets at inlet
It sets ceramic foam filter and can effectively reduce impurity and enter in shell 4, while wall surface impurity blocks filter, improve filter
Service life；
Ceramic foam filter selects aluminium oxide as refractory material, and operating temperature is at 1200 DEG C to 1500 DEG C, porosity
80% to 90%, air penetrability is in 400cm2To 8000cm2, the filter efficiency of ceramic foam filter reaches 90% or more, suitably
Air penetrability, which both ensure that, to cause molten metal fluid resistance big because of air penetrability is too small, will not cause because of air penetrability is excessive
Field trash passes through too many；Filter location beveling simultaneously increases the effective sectional area that molten metal flows through filter, prevents
Only because caused by increasing ceramic foam filter in casting process aluminium alloy flow resistance increase.
A kind of impeller, which is characterized in that impeller is cast using above-mentioned casting technique, and blade wheel structure intensity is high, impurity
Few, the impeller porosity is low.
Embodiment 2:
As shown in connection with fig. 1, the present embodiment provides a kind of impeller low-pressure casting apparatus and impellers, comprising: sealing device, inflation
Device and vacuum evacuation device；Crucible 1 is for accommodating molten metal；2 one end of stalk is sealingly disposed in inside crucible 1, and sandbox is built-in
There is husky and shell 4, the other end of stalk 2 is arranged inside sandbox and connects shell 4, and stalk 2 into shell 4 for conveying
Molten metal；
One end that stalk 2 is located in crucible 1 is provided with filter 3, and filter 3 is used to filter the gold entered in shell 4
Belong to liquid.Filter 3 is ceramic foam filter, increases ceramic foam filter in the inlet position of stalk 2, for filtering
It removes the various non-metallic inclusions being mingled in molten metal and molten metal oxide skin, the inlet and filter 3 of stalk 2 is set
Meter, close to 1 bottom of crucible, guarantees that less molten metal impurity enters filter 3, keeps away simultaneously below 1 inner metal liquid face of crucible
The blocking of filter 3 is exempted from, the service life of filter 3 can be increased substantially.
Ceramic foam filter selects aluminium oxide as refractory material, and operating temperature is at 1200 DEG C to 1500 DEG C, porosity
80% to 90%, air penetrability is in 400cm2To 8000cm2, filter efficiency reaches 90% or more, and suitable air penetrability both ensure that not
Molten metal fluid resistance can be caused big because air penetrability is too small, field trash will not be caused to pass through too much because of air penetrability is excessive.
Filter 3 is inclined relative to horizontal setting, and 3 installation site beveling of filter increases molten metal and flowed through
The effective sectional area of filter 3, prevent because caused by increasing ceramic foam filter in casting process molten metal flow resistance increasing
Add；
Molten metal injects in shell from the main running channel and wheel hub of wheel hub bottom and the cross gate of wheel cap link position, filling type
Shell simultaneously forms impeller.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of pump vane casting technique characterized by comprising
Using type core model casting shell of impeller (4)；
The type core of shell of impeller (4) when type core in the model casting step is used as the pump vane casting；
The shell of impeller (4) forms the impeller with low-pressure casting process.
2. casting technique according to claim 1, which is characterized in that the shell of impeller (4), which has, is located at wheel hub bottom
Main running channel and cross gate positioned at the wheel hub and wheel cap link position.
3. pump vane casting technique according to claim 1, which is characterized in that casting pressure is bent in the low-pressure casting process
Line is divided into a liter liquid stage, fills type stage, pressurization stages and packing stage.
4. casting technique according to claim 1, which is characterized in that in the pressurization stages, when the shell (4) chamber
When solid film occurs in the molten metal of wall contact, into packing stage.
5. casting technique according to claim 1, which is characterized in that the pressurization stages pressure fills type stage pressure to be described
1.5 times -2 times of power.
6. pump vane casting technique according to claim 3, which is characterized in that in the packing stage, dwell pressure is
0.08Mpa-0.12Mpa, dwell time 4min-5min.
7. pump vane casting technique according to claim 1, which is characterized in that the low-pressure casting process includes low pressure casting
Device, the low-pressure casting apparatus enter the molten metal in the shell of impeller (4) using ceramic foam filter filtering.
8. pump vane casting technique according to claim 7, which is characterized in that the low-pressure casting apparatus includes for leaf
Take turns the stalk (2) of conveying molten metal in shell (4), feed liquor of the ceramic foam filter setting in the stalk (2)
Mouthful.
9. pump vane casting technique according to claim 8, which is characterized in that the ceramic foam filter is relative to level
Face is obliquely installed.
10. pump vane casting technique described in -9 any one according to claim 1, which is characterized in that the type core material is pottery
Porcelain.
11. a kind of impeller, which is characterized in that the impeller is cast using casting technique described in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811191214.6A CN109175305A (en) | 2018-10-12 | 2018-10-12 | A kind of pump vane casting technique and impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811191214.6A CN109175305A (en) | 2018-10-12 | 2018-10-12 | A kind of pump vane casting technique and impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109175305A true CN109175305A (en) | 2019-01-11 |
Family
ID=64948327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811191214.6A Pending CN109175305A (en) | 2018-10-12 | 2018-10-12 | A kind of pump vane casting technique and impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109175305A (en) |
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|---|---|---|---|---|
| US6499529B1 (en) * | 2001-08-17 | 2002-12-31 | Hitchiner Manufacturing Co., Inc. | Centrifugal countergravity casting |
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| CN104815961A (en) * | 2015-03-30 | 2015-08-05 | 共享装备有限公司 | Oblique vertical ceramic filter screen seat and casting system adopting filter screen seat |
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2018
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Application publication date: 20190111 |
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