CN106145948A - A kind of oxidation-resistant graphite sealing ring - Google Patents
A kind of oxidation-resistant graphite sealing ring Download PDFInfo
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- CN106145948A CN106145948A CN201510205110.6A CN201510205110A CN106145948A CN 106145948 A CN106145948 A CN 106145948A CN 201510205110 A CN201510205110 A CN 201510205110A CN 106145948 A CN106145948 A CN 106145948A
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Abstract
The invention belongs to solar energy heat utilization technical field, particularly relate to a kind of oxidation-resistant graphite sealing ring, it is characterized in that, each component consists of according to mass fraction: silica flour 5-15 part, boron carbide 5-15 part, Colophonium 65-70 part, graphite 5-15 part, oxolane 1-5 part, after graphite, silica flour, boron carbide and Colophonium are mixed in proportion, use oxolane as dispersant, disperse through ball milling, add in mould, compacting is fired into tubulose, through high-pressure impregnation, hot pressure sintering molding, after molding, cutting cyclization, polishing grinding.Product of the present invention has antioxygenic property height, high intensity, thermal expansion wear-resisting, resistance to, the advantage of good seal performance.
Description
Technical field
The invention belongs to solar energy heat utilization technical field, particularly relate to a kind of oxidation-resistant graphite sealing ring.
Background technology
In the case of Fossil fuel reduces increasingly, solar energy has become the mankind and has used the important component part of the energy, and is constantly developed.The utilization of solar energy has photothermal deformation and opto-electronic conversion two ways, and solar electrical energy generation is a kind of emerging regenerative resource.The advantages such as solar energy has that stock number is big, has a very wide distribution, cleanliness without any pollution, technically reliable.Solar energy generation technology is increasingly becoming China or even the emphasis of international renewable energy technologies development.China's solar energy resources enriches, and grows up more than 2000 hours during regional sunshine in year of national total area more than 2/3, China's solar energy resources year theory reserves up to 1,700,000,000,000 tons of coals.
In the gatherer process of solar energy, solar energy heat collector is provided with the swivel joint for connecting line, the high-temperature medium of circulation is had inside connecting line, swivel joint, swivel joint be internally provided with carbon seal ring, therefore, there is serious impact the service life of the resistance to elevated temperatures butt joint of carbon seal ring.Graphite material is widely used in the fields such as aviation nuclear energy and industry, and but, graphite material starts oxidation in the oxidation environment more than 500 DEG C so that it is application is very limited, and existing carbon seal ring cannot meet use demand.
Summary of the invention
The present invention is directed to above-mentioned technical problem, it is provided that the carbon seal ring that a kind of antioxygenic property is high.
The technical solution adopted in the present invention is: a kind of oxidation-resistant graphite sealing ring, it is characterised in that each component consists of according to mass fraction: silica flour 5-15 part, boron carbide 5-15 part, Colophonium 65-70 part, graphite 5-15 part, oxolane 1-5 part.
Each component consists of according to more high quality number: silica flour 8 parts, boron carbide 10 parts, Colophonium 68 parts, 12 parts of graphite, oxolane 2 parts.
The preparation technology of a kind of oxidation-resistant graphite sealing ring, it is characterised in that comprise the following steps:
(1) according to the mass fraction each component of weighing: silica flour 5-15 part, boron carbide 5-15 part, Colophonium 65-70 part, graphite 5-15 part, oxolane 1-5 part；
(2) after the graphite, silica flour, boron carbide and the Colophonium that weigh in described step (1) being mixed in proportion, use oxolane as dispersant, disperse through ball milling, add in mould, compacting is fired into tubulose, through high-pressure impregnation, hot pressure sintering molding, after molding, cutting cyclization, polishing grinding.
Described step (2) is selected inorganic salt or macromolecule impregnant.
Described step (2) is selected Polycarbosilane as impregnating agent.
The invention have the benefit that
1, in the present invention, silica flour, boron carbide, Colophonium, graphite jointly react and define B4C-SiC ceramic composite, and Colophonium makes composite dispersion phase be uniformly distributed in continuous phase ceramic particle cladding, material surface forms borosilicic acid thin film so that it is at high temperature antioxygenic property improves；
2, the hardness of existing carbon seal ring is low, wear no resistance, the use cycle is short, need frequently replacing, after the present invention adds ceramic phase in graphite, define pottery graphite composite material, it is provided simultaneously with the premium properties of pottery and graphite bi-material, the anti-wear performance not only making material has had large increase, can retain again the self-lubricating property of graphite, reduce friction factor, composite has high intensity and wear-resisting advantage；
3, using oxolane as dispersant, disperse through ball milling, make ceramic particle broken rear and graphite forms dispersion phase, Colophonium is continuous phase, the most both can improve grinding efficiency, and dispersed phase distribution can be made again more uniform；
4, the thermal coefficient of expansion of graphite is 29 × 10-6M/ (m K), and the thermal coefficient of expansion of pottery is 3 × 10-6M/ (m K), bi-material is after compound, and its thermal coefficient of expansion can reduce, and is detected as 10 × 10-6M/ (m K), in the case of a high temperature, its performance of expanding with heat and contract with cold can be amplified further, and the two compound material is more suitable at high temperature life-time service；
5, add inorganic salt or macromolecule impregnant, such as Polycarbosilane so that it is be filled in the surface pore of composite, thus reach sealing function, good seal performance.
Accompanying drawing explanation
The structural representation that Fig. 1-3 is applied in swivel joint for the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described further:
In figure, 1-housing, 2-spring, 3,4,5-carbon seal ring, 6-connector.
Embodiment 1
A kind of oxidation-resistant graphite sealing ring is prepared in accordance with the following steps:
(1) according to the mass fraction each component of weighing: silica flour 15 parts, boron carbide 8 parts, Colophonium 65 parts, 8 parts of graphite, oxolane 5 parts；
(2) graphite, silica flour, boron carbide and the Colophonium that weigh in step (1) are mixed and stirred for uniformly, add oxolane, be then quickly added into ball milling 50h in ball grinder, after ball milling, decompression distillation processes, after decompression distillation is disposed, feed the mixture in mould, 2000 DEG C of heat treatments are pressed into pipe, use Polycarbosilane that pipe is carried out high-pressure impregnation, and impregnation pressure is 0.8MPa, then hot pressure sintering molding, after molding, cut cyclization, polishing grinding.
Embodiment 2
A kind of oxidation-resistant graphite sealing ring is prepared in accordance with the following steps:
(1) according to the mass fraction each component of weighing: silica flour 12 parts, boron carbide 5 parts, Colophonium 70 parts, 5 parts of graphite, oxolane 3 parts；
(2) graphite, silica flour, boron carbide and the Colophonium that weigh in step (1) are mixed and stirred for uniformly, add oxolane, be then quickly added into ball milling 50h in ball grinder, after ball milling, decompression distillation processes, after decompression distillation is disposed, feed the mixture in mould, 2000 DEG C of heat treatments are pressed into pipe, use macromolecule impregnant that pipe is carried out high-pressure impregnation, and impregnation pressure is 0.8MPa, then hot pressure sintering molding, after molding, cut cyclization, polishing grinding.
Embodiment 3
A kind of oxidation-resistant graphite sealing ring is prepared in accordance with the following steps:
(1) according to the mass fraction each component of weighing: silica flour 8 parts, boron carbide 10 parts, Colophonium 68 parts, 12 parts of graphite, oxolane 2 parts；
(2) graphite, silica flour, boron carbide and the Colophonium that weigh in step (1) are mixed and stirred for uniformly, add oxolane, be then quickly added into ball milling 50h in ball grinder, after ball milling, decompression distillation processes, after decompression distillation is disposed, feed the mixture in mould, 2000 DEG C of heat treatments are pressed into pipe, use macromolecule impregnant that pipe is carried out high-pressure impregnation, and impregnation pressure is 0.8MPa, then hot pressure sintering molding, after molding, cut cyclization, polishing grinding.
Embodiment 4
A kind of oxidation-resistant graphite sealing ring is prepared in accordance with the following steps:
(1) according to the mass fraction each component of weighing: silica flour 10 parts, boron carbide 15 parts, Colophonium 67 parts, 15 parts of graphite, oxolane 2 parts；
(2) graphite, silica flour, boron carbide and the Colophonium that weigh in step (1) are mixed and stirred for uniformly, add oxolane, be then quickly added into ball milling 50h in ball grinder, after ball milling, decompression distillation processes, after decompression distillation is disposed, feed the mixture in mould, 2000 DEG C of heat treatments are pressed into pipe, use Polycarbosilane that pipe is carried out high-pressure impregnation, and impregnation pressure is 0.8MPa, then hot pressure sintering molding, after molding, cut cyclization, polishing grinding.
Embodiment 5
A kind of oxidation-resistant graphite sealing ring is prepared in accordance with the following steps:
(1) according to the mass fraction each component of weighing: silica flour 5 parts, boron carbide 12 parts, Colophonium 65 parts, 10 parts of graphite, oxolane 1 part；
(2) graphite, silica flour, boron carbide and the Colophonium that weigh in step (1) are mixed and stirred for uniformly, add oxolane, be then quickly added into ball milling 50h in ball grinder, after ball milling, decompression distillation processes, after decompression distillation is disposed, feed the mixture in mould, 2000 DEG C of heat treatments are pressed into pipe, use inorganic salt impregnating agent that pipe is carried out high-pressure impregnation, and impregnation pressure is 0.8MPa, then hot pressure sintering molding, after molding, cut cyclization, polishing grinding.
Fig. 1-3 is the structural representation that the carbon seal ring in the present invention is applied in 3 kinds of swivel joints, wherein, the housing 1 of swivel joint selects 321(0Cr19Ni10Ti) austenitic stainless steel, austenitic stainless steel has the advantages such as high temperature resistant, wear-resistant, resistance to oxidation, after processing, carry out solution treatment, high-temperature salt bath, increase case hardness and corrosion resistance.
Performance test
(1) product in the present invention carrying out friction-wear test, testing equipment uses MHK-500 ring block type friction wear testing machine, and under conditions of PV value is 30MPa m/s, the coefficient of friction of carbon seal ring is 0.198, and volume wear is 0.26
mm3, it is the 1/10 of pure graphite wear extent；During pressure rate value increases, the coefficient of friction change of pottery graphite composite material is little, shows that friction coefficient of composite material is impacted less.
(2) product in the present invention is carried out oxidation resistance test, concrete test is carried out according to the method for regulation in the non-oxidizability bioassay standard of People's Republic of China's aircraft industry standard HB5258-2000 steel and high temperature alloy, and the average oxidation speed of product of the present invention is 0.4g/m2H, the average oxidation skin amount of coming off is 5.0g/m2, reaching 2 grades, antioxygenic property is high.
Above 5 embodiments of the present invention are described in detail, but described content has been only presently preferred embodiments of the present invention, it is impossible to be considered the practical range for limiting the present invention.All impartial changes made according to the present patent application scope and improvement etc., within all should still belonging to the patent covering scope of the present invention.
Claims (5)
1. an oxidation-resistant graphite sealing ring, it is characterised in that each component consists of according to mass fraction: silica flour 5-15 part, boron carbide 5-15 part, Colophonium 65-70 part, graphite 5-15 part, oxolane 1-5 part.
A kind of oxidation-resistant graphite sealing ring the most according to claim 1, it is characterised in that each component consists of according to more high quality number: silica flour 8 parts, boron carbide 10 parts, Colophonium 68 parts, 12 parts of graphite, oxolane 2 parts.
3. the preparation technology of an oxidation-resistant graphite sealing ring, it is characterised in that comprise the following steps:
(1) according to the mass fraction each component of weighing: silica flour 5-15 part, boron carbide 5-15 part, Colophonium 65-70 part, graphite 5-15 part, oxolane 1-5 part；
(2) after the graphite, silica flour, boron carbide and the Colophonium that weigh in described step (1) being mixed in proportion, use oxolane as dispersant, disperse through ball milling, add in mould, compacting is fired into tubulose, through high-pressure impregnation, hot pressure sintering molding, after molding, cutting cyclization, polishing grinding.
The preparation technology of a kind of oxidation-resistant graphite sealing ring the most according to claim 3, it is characterised in that select inorganic salt or macromolecule impregnant in described step (2).
The preparation technology of a kind of oxidation-resistant graphite sealing ring the most according to claim 3, it is characterised in that select Polycarbosilane as impregnating agent in described step (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510205110.6A CN106145948A (en) | 2015-04-27 | 2015-04-27 | A kind of oxidation-resistant graphite sealing ring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510205110.6A CN106145948A (en) | 2015-04-27 | 2015-04-27 | A kind of oxidation-resistant graphite sealing ring |
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| CN106145948A true CN106145948A (en) | 2016-11-23 |
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| CN201510205110.6A Pending CN106145948A (en) | 2015-04-27 | 2015-04-27 | A kind of oxidation-resistant graphite sealing ring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131519A (en) * | 2017-12-11 | 2018-06-08 | 中国船舶重工集团公司第七0五研究所 | A kind of rotation seal joint for the connection of high temperature and pressure motion tubes |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1357510A (en) * | 2001-07-24 | 2002-07-10 | 中国科学院等离子体物理研究所 | Composite doped graphite material and its prepn |
| US20040166333A1 (en) * | 2002-06-07 | 2004-08-26 | The Boeing Company | Method and composition for sealing components and components sealed thereby |
| CN1677730A (en) * | 2005-04-18 | 2005-10-05 | 浙江大学 | Preparing method for composite two-pole plate for proton exchange film fuel cell |
| CN102745991A (en) * | 2012-06-26 | 2012-10-24 | 宁波东联密封件有限公司 | Molded sintered graphite sealing ring and preparation method thereof |
| CN104485458A (en) * | 2014-12-03 | 2015-04-01 | 林前锋 | Method for preparing graphite spheres |
-
2015
- 2015-04-27 CN CN201510205110.6A patent/CN106145948A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1357510A (en) * | 2001-07-24 | 2002-07-10 | 中国科学院等离子体物理研究所 | Composite doped graphite material and its prepn |
| US20040166333A1 (en) * | 2002-06-07 | 2004-08-26 | The Boeing Company | Method and composition for sealing components and components sealed thereby |
| CN1677730A (en) * | 2005-04-18 | 2005-10-05 | 浙江大学 | Preparing method for composite two-pole plate for proton exchange film fuel cell |
| CN102745991A (en) * | 2012-06-26 | 2012-10-24 | 宁波东联密封件有限公司 | Molded sintered graphite sealing ring and preparation method thereof |
| CN104485458A (en) * | 2014-12-03 | 2015-04-01 | 林前锋 | Method for preparing graphite spheres |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131519A (en) * | 2017-12-11 | 2018-06-08 | 中国船舶重工集团公司第七0五研究所 | A kind of rotation seal joint for the connection of high temperature and pressure motion tubes |
| CN108131519B (en) * | 2017-12-11 | 2019-05-31 | 中国船舶重工集团公司第七0五研究所 | A kind of rotation seal joint for the connection of high temperature and pressure motion tubes |
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Application publication date: 20161123 |