CN111472995A - Manufacturing method of silicon carbide ceramic lining metal pump cover - Google Patents
Manufacturing method of silicon carbide ceramic lining metal pump cover Download PDFInfo
- Publication number
- CN111472995A CN111472995A CN202010302018.2A CN202010302018A CN111472995A CN 111472995 A CN111472995 A CN 111472995A CN 202010302018 A CN202010302018 A CN 202010302018A CN 111472995 A CN111472995 A CN 111472995A
- Authority
- CN
- China
- Prior art keywords
- metal framework
- silicon carbide
- carbide ceramic
- pump cover
- lining
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0023—Lining the inner wall of hollow objects, e.g. pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/20—Oxide or non-oxide ceramics
- F05D2300/22—Non-oxide ceramics
- F05D2300/226—Carbides
- F05D2300/2261—Carbides of silicon
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
Abstract
The invention discloses a manufacturing method of a silicon carbide ceramic lining metal pump cover, which comprises the following steps of firstly processing a metal framework, wherein the shape of the metal framework is matched with that of a pump cover product, the inner shape of the metal framework is thinner than that of the pump cover product, and a lining adsorption hole is formed in the metal framework; then, performing surface roughening treatment on the inner side of the metal framework by adopting a shot blasting and sand blasting process; and then adopting a casting mould to coat the silicon carbide ceramic lining layer on the inner side of the metal framework, wherein the joint surface of the silicon carbide ceramic lining layer and the metal framework is fixed through a lining adsorption hole. The manufacturing method has high reliability, ensures the effective application of the silicon carbide ceramic lining layer, ensures the corrosion resistance and the wear resistance of the pump cover, and prolongs the service life of the pump cover. By processing the lining adsorption holes on the metal framework, the problems of honeycomb defects and poor binding capacity with the metal framework in the traditional composite pump cover forming process are solved.
Description
Technical Field
The invention relates to a manufacturing method of a silicon carbide ceramic lining metal pump cover, and belongs to the technical field of centrifugal pumps.
Background
The silicon carbide ceramic pump cover is a pump cover with a special structure, a silicon carbide ceramic lining material is lined in a designated area on the surface of a metal framework, and a medium contact part is silicon carbide ceramic, so that the silicon carbide ceramic pump cover has extremely strong corrosion resistance and abrasion resistance, the service life of the silicon carbide ceramic pump cover is 4-6 times that of a common metal pump cover, and the application field is extremely wide.
In the process of lining the silicon carbide ceramic with the metal skeleton, if air in the silicon carbide ceramic lining material cannot be completely exhausted, a large number of irremovable honeycomb defects exist on the surface and inside of the silicon carbide ceramic, and the defects can cause media to corrode the peripheral metal skeleton, so that parts are damaged. Meanwhile, the binding capacity of the silicon carbide ceramic lining material and the metal framework is limited, and if the metal framework is not designed reasonably, the lining material can fall off in a large area, so that the service life of parts is seriously influenced.
Disclosure of Invention
The invention aims to solve the problems that the surface and the interior of a lining material of a silicon carbide ceramic pump cover have serious defects, the lining material is easy to fall off and the like, and provides a manufacturing method of a silicon carbide ceramic lining metal pump cover.
The purpose of the invention is realized by the following technical scheme.
The invention discloses a manufacturing method of a silicon carbide ceramic lining metal pump cover, which comprises the following specific manufacturing steps:
1) processing a metal framework, wherein the shape of the metal framework is matched with that of a pump cover product, the thickness of the inner shape of the metal framework is reduced compared with that of the pump cover product, and a lining adsorption hole is formed in the metal framework;
2) performing surface roughness treatment on the inner side of the metal framework by adopting a shot blasting and sand blasting process, and removing burrs and sharp corners to ensure that the surface roughness after treatment generally reaches Sa2.5 or Sa3 level;
3) performing oil stain treatment and rust prevention treatment on the inner side surface of the metal framework again;
4) positioning the metal framework in a casting mold, heating the metal framework and the mold to 120 ℃ in a vacuum-pumping environment, and carrying out heat preservation until the moisture on the metal framework is dried;
5) heating and stirring the silicon carbide ceramic material under a vacuum-pumping environment to melt phenolic resin in the silicon carbide ceramic material;
6) pressurizing and injecting the heated and stirred silicon carbide ceramic material into a casting mold, so that the silicon carbide ceramic lining layer is coated on the inner side of the metal framework, and the joint surface of the silicon carbide ceramic lining layer and the metal framework is fixed through a lining adsorption hole;
7) and after the casting is finished, naturally cooling to room temperature, and polishing and removing a dead head part on the outer side of the pump cover to obtain the silicon carbide ceramic lining metal pump cover.
The metal framework is a casting part processed by a nodular cast iron material, a stainless steel material or a carbon steel material.
The thickness of the silicon carbide ceramic lining layer is 6-20 mm.
The inner lining adsorption holes of the metal framework are all of horn mouth structures with large outside diameters and small inside diameters.
The outermost side diameter of the liner adsorption hole of the metal framework is 40-60 mm; the innermost diameter of the liner adsorption hole of the metal framework is 30-50 mm; the mouth part of the innermost side of the lining adsorption hole of the metal framework is processed into a circular arc-shaped transition surface.
Each lining adsorption hole of metal framework is many circles of circumference and distributes, and is the crisscross distribution between each circle of lining adsorption hole.
The inner side outer edge of the metal framework is processed with an annular positioning groove, and the inner side width of the annular positioning groove is larger than the outer side width of the annular positioning groove, so that the bonding capacity of the silicon carbide ceramic inner liner layer and the metal framework is improved.
Advantageous effects
The manufacturing method has high reliability, ensures the effective application of the silicon carbide ceramic lining layer, ensures the corrosion resistance and the wear resistance of the pump cover, and prolongs the service life of the pump cover. By processing the lining adsorption holes on the metal framework, the problems of honeycomb defects and poor binding capacity with the metal framework in the traditional composite pump cover forming process are solved.
Drawings
FIG. 1 is a diagram of a silicon carbide ceramic lined metal pump cover obtained by the manufacturing method of the present invention;
FIG. 2 is a top view of a metal skeleton in a silicon carbide ceramic lining metal pump cover obtained by the manufacturing method of the present invention;
wherein: 1-a metal skeleton; 2-a silicon carbide ceramic lining layer.
Detailed Description
The invention is further described with reference to the following figures and examples:
examples
The invention discloses a manufacturing method of a silicon carbide ceramic lining metal pump cover, which comprises the following specific manufacturing steps:
1) processing a metal framework 1, wherein the inner shape of the metal framework 1 is thinner than that of a pump cover product, and a lining adsorption hole is formed in the metal framework 1; FIG. 2 is a top view of a metal skeleton;
2) performing surface roughness treatment on the inner side of the metal framework 1 by adopting a shot blasting and sand blasting process, and removing burrs and sharp corners to ensure that the surface roughness after treatment generally reaches Sa2.5 or Sa3 level; the sand blasting adopts quartz sand with the granularity of 0.5-1.5mm, oil stains and rusts on the surface of the metal framework can be completely cleaned, but certain roughness can improve the adhesive force of the lining layer;
3) performing oil stain treatment and rust prevention treatment on the inner side surface of the metal framework 1 again;
4) positioning the metal framework 1 in a casting mould, heating the metal framework 1 to 110 ℃ along with the mould in a vacuum-pumping environment, and carrying out heat preservation until the moisture on the metal framework is dried;
5) heating and stirring the silicon carbide ceramic material under a vacuum-pumping environment to melt phenolic resin in the silicon carbide ceramic material;
6) pressurizing and injecting the heated and stirred silicon carbide ceramic material into a casting mold, so that the silicon carbide ceramic lining layer 2 is coated on the inner side of the metal framework 1, and the interface of the silicon carbide ceramic lining layer 2 and the metal framework 1 is fixed through a lining adsorption hole;
7) after the casting is finished, the casting is naturally cooled to room temperature, and the riser part on the outer side of the pump cover is polished and removed, so that the silicon carbide ceramic lining metal pump cover is obtained, as shown in fig. 1.
The metal framework 1 is a casting part processed by ductile cast iron materials.
The thickness of the silicon carbide ceramic lining layer 2 is 10 mm.
And the lining adsorption holes of the metal framework 1 are all horn mouth structures with large outside diameters and small inside diameters.
The outermost side of the liner adsorption hole of the metal framework 1 is 50mm in diameter; the innermost diameter of the liner adsorption hole of the metal framework 1 is 40 mm; the mouth part of the innermost side of the lining adsorption hole of the metal framework is processed into a circular arc-shaped transition surface.
Each inside lining absorption hole of metal framework 1 is 4 circles of circumference distributions, and is the staggered distribution between each circle of inside lining absorption hole.
An annular positioning groove is processed at the inner side outer edge of the metal framework 1, the inner side width of the annular positioning groove is larger than the outer side width, and the bonding capacity of the silicon carbide ceramic inner liner layer 2 and the metal framework 1 is improved.
Claims (8)
1. A manufacturing method of a silicon carbide ceramic lining metal pump cover is characterized by comprising the following steps: the specific manufacturing steps are as follows:
1) processing a metal framework, wherein the shape of the metal framework is matched with that of a pump cover product, the thickness of the inner shape of the metal framework is reduced compared with that of the pump cover product, and a lining adsorption hole is formed in the metal framework;
2) performing surface roughness treatment on the inner side of the metal framework by adopting a shot blasting and sand blasting process, and removing burrs and sharp corners to ensure that the surface roughness after treatment generally reaches Sa2.5 or Sa3 level;
3) performing oil stain treatment and rust prevention treatment on the inner side surface of the metal framework again;
4) positioning the metal framework in a casting mold, heating the metal framework and the mold to 120 ℃ in a vacuum-pumping environment, and carrying out heat preservation until the moisture on the metal framework is dried;
5) heating and stirring the silicon carbide ceramic material under a vacuum-pumping environment to melt phenolic resin in the silicon carbide ceramic material;
6) pressurizing and injecting the heated and stirred silicon carbide ceramic material into a casting mold, so that the silicon carbide ceramic lining layer is coated on the inner side of the metal framework, and the joint surface of the silicon carbide ceramic lining layer and the metal framework is fixed through a lining adsorption hole;
7) and after the casting is finished, naturally cooling to room temperature, and polishing and removing a dead head part on the outer side of the pump cover to obtain the silicon carbide ceramic lining metal pump cover.
2. The method of claim 1, further comprising: the inner lining adsorption holes of the metal framework are all of horn mouth structures with large outside diameters and small inside diameters.
3. The method of claim 2, wherein: the outermost side diameter of the liner adsorption hole of the metal framework is 40-60 mm; the innermost diameter of the liner adsorption hole of the metal framework is 30-50 mm.
4. A method of manufacture as claimed in any one of claims 1 to 3, wherein: the mouth part of the innermost side of the lining adsorption hole of the metal framework is processed into a circular arc-shaped transition surface.
5. A method of manufacture as claimed in any one of claims 1 to 3, wherein: the metal framework is a casting part processed by a nodular cast iron material, a stainless steel material or a carbon steel material.
6. A method of manufacture as claimed in any one of claims 1 to 3, wherein: the thickness of the silicon carbide ceramic lining layer is 6-20 mm.
7. A method of manufacture as claimed in any one of claims 1 to 3, wherein: each lining adsorption hole of metal framework is many circles of circumference and distributes, and is the crisscross distribution between each circle of lining adsorption hole.
8. A method of manufacture as claimed in any one of claims 1 to 3, wherein: an annular positioning groove is processed at the inner side outer edge of the metal framework, and the inner side width of the annular positioning groove is larger than the outer side width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010302018.2A CN111472995A (en) | 2020-04-16 | 2020-04-16 | Manufacturing method of silicon carbide ceramic lining metal pump cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010302018.2A CN111472995A (en) | 2020-04-16 | 2020-04-16 | Manufacturing method of silicon carbide ceramic lining metal pump cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111472995A true CN111472995A (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010302018.2A Pending CN111472995A (en) | 2020-04-16 | 2020-04-16 | Manufacturing method of silicon carbide ceramic lining metal pump cover |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4052133A (en) * | 1975-11-12 | 1977-10-04 | The Gorman-Rupp Company | Corrosion and abrasion resistant centrifugal pump |
| CN2199337Y (en) * | 1994-10-10 | 1995-05-31 | 旅顺长城不锈钢厂 | Steel-plastics composite mechanical sealed diluted acid pump |
| CN104265647A (en) * | 2014-07-31 | 2015-01-07 | 苏州淮通电气有限公司 | Wear-resisting impact-resisting immersible pump |
| CN205423273U (en) * | 2016-03-14 | 2016-08-03 | 石家庄科宏泵业有限公司 | Centrifugal pump composite ceramic flow passage components |
| CN109209856A (en) * | 2018-10-19 | 2019-01-15 | 苏州奥耐特碳化硅陶瓷科技有限公司 | A kind of pump cover and its manufacturing method |
-
2020
- 2020-04-16 CN CN202010302018.2A patent/CN111472995A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4052133A (en) * | 1975-11-12 | 1977-10-04 | The Gorman-Rupp Company | Corrosion and abrasion resistant centrifugal pump |
| CN2199337Y (en) * | 1994-10-10 | 1995-05-31 | 旅顺长城不锈钢厂 | Steel-plastics composite mechanical sealed diluted acid pump |
| CN104265647A (en) * | 2014-07-31 | 2015-01-07 | 苏州淮通电气有限公司 | Wear-resisting impact-resisting immersible pump |
| CN205423273U (en) * | 2016-03-14 | 2016-08-03 | 石家庄科宏泵业有限公司 | Centrifugal pump composite ceramic flow passage components |
| CN109209856A (en) * | 2018-10-19 | 2019-01-15 | 苏州奥耐特碳化硅陶瓷科技有限公司 | A kind of pump cover and its manufacturing method |
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Application publication date: 20200731 |