CN103697162A - Silver thin film composited carbon sealing ring and preparation method thereof - Google Patents
Silver thin film composited carbon sealing ring and preparation method thereof Download PDFInfo
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- CN103697162A CN103697162A CN201310631386.1A CN201310631386A CN103697162A CN 103697162 A CN103697162 A CN 103697162A CN 201310631386 A CN201310631386 A CN 201310631386A CN 103697162 A CN103697162 A CN 103697162A
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Abstract
The invention relates to a silver thin film composited carbon sealing ring and a preparation method thereof, and solves problems of sealing material lubrication, high temperature oxidation and thermal expansion in oil heat extraction sealing technology and problems in composite technology of more sealing materials. A conventional sealing material composite technology and a sealing ring prepared by the conventional technology have the disadvantages that the sealing effect, the cold resisting effect and the heat resisting effect are bad. The method provided by the invention comprises the following steps: a silver film (2) is composited on the surface of a carbon ring (1), the inner diameter of the carbon ring is 10 cm, and the outer diameter of the carbon ring is 12 cm. The invention relates to the sealing ring and the preparation thereof.
Description
Technical field:
The present invention relates to carbon seal ring of a kind of composite silver film and preparation method thereof.
Background technique:
In order to solve in seal unit of oil heat extraction equipment, sealing material is lubricated, high temperature oxidation and heat expansion issues, has the complex technique of a lot of sealing materials.But the sealing effect of the seal ring of existing sealing material complex technique and preparation thereof, anti-cold, heat resistanceheat resistant weak effect.
From the structure of composite material and complex method, to argent and graphite-base composite material, the application seal unit of oil heat extraction equipment designs in the present invention.Studied the impact of vacuum high-pressure impregnating method preparation technique condition on Ag/ graphite-seal ring performance.
Summary of the invention:
The object of this invention is to provide carbon seal ring of a kind of composite silver film and preparation method thereof.
Above-mentioned object realizes by following technological scheme:
A carbon seal ring for composite silver film, its composition comprises: carbocyclic ring, described carbocyclic ring surface recombination silverskin, the internal diameter of described carbocyclic ring is ф 10cm, the external diameter of described carbocyclic ring is ф 12cmm.
A preparation method for the carbon seal ring of composite silver film, the first step adds plumbago in die forming machine, adds that to be pressed into internal diameter be that ф 10cm, external diameter are the carbocyclic ring of ф 12cmm;
Second step, carries out the processing such as surface finish to described carbocyclic ring, put it into afterwards in the mould of high pressure vacuum dipping stove;
The 3rd step, puts into by solid-state silver the crucible that high pressure vacuum floods stove, and heat and when making its fusing, described high pressure vacuum dipping stove is vacuumized, and the carbocyclic ring described in preheating;
The 4th step, temperature in described high pressure vacuum dipping stove is that 1000～1100 ℃, pressure are while being 20～25Mpa, crucible liquid outlet is aimed to the mould pipeline entrance that carbocyclic ring is housed, making to melt state silvering solution enters in described mould through described pipeline, described carbocyclic ring is impregnated with molten state silvering solution in mould, silvering solution externally under pressure-acting, is squeezed in the hole of described carbocyclic ring, finally forms the carbon seal ring of composite silver film.
The preparation method of the carbon seal ring of described composite silver film, the purity of described plumbago is more than 99%.
Beneficial effect:
1. the carbon seal ring of the composite silver film of the present invention's design is simple in structure, and in its preparation process, parameters is reasonable in design, silvering solution graphite-base composite material can be used in petroleum thermal recovery seal configuration completely, through zero load, cold examination, heat examination, system sealing performance reaches designing requirement, without leakage, scuffing, occur, and other function admirable.
2. the Main Ingredients and Appearance of the carbon seal ring of the composite silver film of the present invention's design is Ag, C, and is mixed with S, O element, and Ag content is few; Internal main will consist of C composition, and its thermal expansion coefficient is 6X10-6/ ℃ after tested, and friction factor is 0.11-0.15.
Accompanying drawing explanation:
Accompanying drawing 1 is the structural representation of the carbon seal ring of the composite silver film that the present invention relates to.
Embodiment:
Embodiment 1:
A carbon seal ring for composite silver film, its composition comprises: carbocyclic ring 1, described carbocyclic ring surface recombination silverskin 2, the internal diameter of described carbocyclic ring is ф 10cm, the external diameter of described carbocyclic ring is ф 12cmm.
Embodiment 2:
A preparation method for the carbon seal ring of composite silver film, the first step adds plumbago in die forming machine, adds that to be pressed into internal diameter be that ф 10cm, external diameter are the carbocyclic ring of ф 12cmm;
Second step, carries out the processing such as surface finish to described carbocyclic ring, put it into afterwards in the mould of high pressure vacuum dipping stove;
The 3rd step, puts into by solid-state silver the crucible that high pressure vacuum floods stove, and heat and when making its fusing, described high pressure vacuum dipping stove is vacuumized, and the carbocyclic ring described in preheating;
The 4th step, temperature in described high pressure vacuum dipping stove is that 1000～1100 ℃, pressure are while being 20～25Mpa, crucible liquid outlet is aimed to the mould pipeline entrance that carbocyclic ring is housed, making to melt state silvering solution enters in described mould through described pipeline, described carbocyclic ring is impregnated with molten state silvering solution in mould, silvering solution externally under pressure-acting, is squeezed in the hole of described carbocyclic ring, finally forms the carbon seal ring of composite silver film.
Embodiment 3:
According to the preparation method of the carbon seal ring of the composite silver film described in embodiment 2, the purity of described plumbago is more than 99%.
The carbon seal ring preparation process of described composite silver film determines:
In the carbon seal ring preparation process of described composite silver film, the different performances that directly affect the carbon seal ring of composite silver film of process parameter, especially form material impact to the generation at interface.Moist type mainly be take as main in the interface that the carbon seal ring of composite silver film generates, and has small part reactive interfacial to exist.When only considering graphite material dipping effect, major influence factors has:
1) argent melt temperature: temperature is higher, mobility is better, is more easily filled into carbocyclic ring deep layer, but is subject to the restriction of silver-colored melting point heating-up temperature cannot be arranged to be greater than the higher value of 720 ℃; On the other hand, graphite is high energy material, and in the time of 720 ℃, its surface tension is 230mN.m-1.With melt temperature, raise, molten state silvering solution and carbocyclic ring reaction product layer thickness, by surpassing the thickness of critical optimum response layer, form fragility interface, and performance will degenerate, and cause laminated film overall performance to decline.
2) carbocyclic ring preheating temperature: preheating temperature is higher, argent melt more easily infiltrates the inner deep layer of prefabricated component, and cooled and solidified speed is slower, floods more fully, and preheating temperature is higher, and impregnating depth is darker.
3) external pressure: in vacuum pressure impregnation, external pressure is dipping direct driving force, and pressure is larger, and impregnating depth is darker.
4) rate of cooling: rate of cooling is slower, molten state silvering solution more easily flow into carbocyclic ring deep layer.But meanwhile,, if rate of cooling is slow, known according to composite material interface complex effect theory, molten state silvering solution is also more abundant with reacting of carbocyclic ring interface, more easily generates fragility interface, causes the hydraulic performance decline of the carbon seal ring of A composite silver film.
5) carbocyclic ring gap: directly the most serious on impregnating depth impact.According to capillary pressure PC and wrapping angle θ relation, gap is thinner, and molten state silvering solution is more easily penetrated into carbocyclic ring deep layer, and impregnating depth is darker.
The test result of the carbon seal ring of described composite silver film:
For the sealing effect of the carbon seal ring of checking composite silver film, guarantee that the complete machine being applied to has good seal performance, and combination property reaches best, the complete machine being applied to is carried out to zero load, cold examination, heat examination experiment.
1) no load test:
Whether test complete machine is when not loading, and whether system leaks, start, stop and be steady, whether move reliably, various logic relation, experimental condition is under normal temperature and pressure if whether correctly waiting content measurement test, pump is imported and exported all in open mode, and system is moved 1 hour continuously.Laboratory data is in Table 1:
Table 1 no-load test data:
2) try cold: test system, after application of load, normal temperature, has under pressure existence condition, actual loading ability, whether hydraulic system reliable, whether system drive ability reaches requirement and leakage test, medium is water.Pump inlet and outlet pressure is poor should be not less than 4Mpa, moves continuously 1 hour, and laboratory data is in Table 2.
The cold examination test data of table 2
3) heat examination: test system is loading under load condition, and under High Temperature High Pressure, system has or not leakage, and whether system drive ability meets the requirements of test.Test(ing) medium is steam, and temperature is not less than 350 ℃, pump inlet pressure >=15Mpa, and pump discharge pressure and inlet pressure be poor >=4Mpa, moves 206 hours continuously.Laboratory data is in Table 3:
Table 3 heat examination test data
Claims (3)
1. a carbon seal ring for composite silver film, its composition comprises: carbocyclic ring, is characterized in that: described carbocyclic ring surface recombination silverskin, the internal diameter of described carbocyclic ring is ф 10cm, the external diameter of described carbocyclic ring is ф 12cmm.
2. a preparation method for the carbon seal ring of composite silver film, is characterized in that: the first step, in die forming machine, add plumbago, and add that to be pressed into internal diameter be that ф 10cm, external diameter are the carbocyclic ring of ф 12cmm;
Second step, carries out the processing such as surface finish to described carbocyclic ring, put it into afterwards in the mould of high pressure vacuum dipping stove;
The 3rd step, puts into by solid-state silver the crucible that high pressure vacuum floods stove, and heat and when making its fusing, described high pressure vacuum dipping stove is vacuumized, and the carbocyclic ring described in preheating;
The 4th step, temperature in described high pressure vacuum dipping stove is that 1000 ~ 1100 ℃, pressure are while being 20 ~ 25Mpa, crucible liquid outlet is aimed to the mould pipeline entrance that carbocyclic ring is housed, making to melt state silvering solution enters in described mould through described pipeline, described carbocyclic ring is impregnated with molten state silvering solution in mould, silvering solution externally under pressure-acting, is squeezed in the hole of described carbocyclic ring, finally forms the carbon seal ring of composite silver film.
3. the preparation method of the carbon seal ring of composite silver film according to claim 2, is characterized in that: the purity of described plumbago is more than 99%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310631386.1A CN103697162A (en) | 2013-12-02 | 2013-12-02 | Silver thin film composited carbon sealing ring and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310631386.1A CN103697162A (en) | 2013-12-02 | 2013-12-02 | Silver thin film composited carbon sealing ring and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1286321A (en) * | 1999-09-01 | 2001-03-07 | 中国科学院金属研究所 | Process for plating flexible graphite products with thick silver layer |
| US20060057386A1 (en) * | 2004-09-09 | 2006-03-16 | Nissin Kogyo Co., Ltd. | Composite material and method of producing the same, and composite metal material and method of producing the same |
| US20100047546A1 (en) * | 2006-05-22 | 2010-02-25 | Vinod Chintamani Malshe | Non-Metallic Nano/Micro Particles Coated with Metal, Process and Applications Thereof |
| CN102276950A (en) * | 2011-05-18 | 2011-12-14 | 湖州松华橡塑有限公司 | Polytetrafluoroethylene (PTFE) composite material sealing ring with high temperature resistance and low creep, and preparation method thereof |
-
2013
- 2013-12-02 CN CN201310631386.1A patent/CN103697162A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1286321A (en) * | 1999-09-01 | 2001-03-07 | 中国科学院金属研究所 | Process for plating flexible graphite products with thick silver layer |
| US20060057386A1 (en) * | 2004-09-09 | 2006-03-16 | Nissin Kogyo Co., Ltd. | Composite material and method of producing the same, and composite metal material and method of producing the same |
| US20100047546A1 (en) * | 2006-05-22 | 2010-02-25 | Vinod Chintamani Malshe | Non-Metallic Nano/Micro Particles Coated with Metal, Process and Applications Thereof |
| CN102276950A (en) * | 2011-05-18 | 2011-12-14 | 湖州松华橡塑有限公司 | Polytetrafluoroethylene (PTFE) composite material sealing ring with high temperature resistance and low creep, and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 汤卉等: "Ag/石墨密封环在石油热采中的应用", 《第六届中国功能材料及其应用学术会议论文集（10）》 * |
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Application publication date: 20140402 |