CN101451058A - Carbon graphite composite material for sea water pump sealing and preparation method thereof - Google Patents
Carbon graphite composite material for sea water pump sealing and preparation method thereof Download PDFInfo
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- CN101451058A CN101451058A CNA2007101587592A CN200710158759A CN101451058A CN 101451058 A CN101451058 A CN 101451058A CN A2007101587592 A CNA2007101587592 A CN A2007101587592A CN 200710158759 A CN200710158759 A CN 200710158759A CN 101451058 A CN101451058 A CN 101451058A
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- carbon graphite
- water pump
- composite material
- sea water
- charcoal
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Abstract
The invention relates to a carbon graphite composite material, in particular to a carbon graphite composite material for sealing a seawater pump and a method for preparing the same. The composite material is formed through impregnating furan resin by a carbon graphite substrate; and the weight percentage of the furan resin is between 5 and 10 percent. The preparation method comprises: the carbon graphite substrate is put into an impregnating vessel, vacuumized, pressurized through nitrogen gas or compressed air and taken out; resin on the surface of the carbon graphite is wiped out; and the carbon graphite is aired under the condition of natural ventilation. The impregnated carbon graphite is put into a curing tank and is heated and cured; after temperature and pressure maintenance is completed, power is cut; and the carbon graphite is cooled and decompressed along a furnace to a temperature of below 50 DEG C and is take out. After resin crust is peeled off through machining, the carbon graphite is subjected to secondary impregnation and curing according to the process. The prepared material has comprehensive performance of excellent lubrication, sealing, wearing resistance, seawater corrosion resistance, high strength and the like, has low manufacturing cost and fully meets the use requirement of the seawater pump.
Description
Technical field
The present invention relates to carbon graphite composite material, be specially a kind of carbon graphite composite material for sea water pump sealing and preparation method thereof.
Background technology
In engine working process, each sub-system all must be safe and reliable, just can guarantee the normal operation of whole power set usually for some power set in China's Marine engineering.The major function of sea-water pump is to provide enough high pressure sea waters to the combustion chamber of hot operation state and engine etc., in time they is implemented to cool.Guarantee that each parts is operated under the safe condition.The stationary ring of sea-water pump is that the above-mentioned furane resin matrix material that soaks processes, with its paired pair of friction components be chromium plated steel, the pressure of seawater medium is 2.9MPa, average linear velocity 6m/s.Requirement to stationary ring is: use more than ten times at every turn necessary trouble-free service 1250 seconds continuously.
Summary of the invention
The object of the invention is to provide a kind of carbon graphite composite material for sea water pump sealing that can work under these conditions and preparation method thereof, and satisfy the material of sea-water pump service requirements in the Marine engineering, this material has over-all propertieies such as excellent lubrication, sealing, wear-resisting, seawater corrosion resistance and intensity height, and cost is lower.
Technical scheme of the present invention is:
The invention provides a kind of carbon graphite composite material for sea water pump sealing, this material soaks furane resin by the charcoal graphite matrix and constitutes, the weight percent of furane resin is 5-10%, charcoal graphite matrix is wherein selected the carbon graphite material of finestructure, highly dense, high-strength, medium degree of graphitization for use, requires volume density 1.80-1.84g/cm
3, folding strength 50MPa, ultimate compression strength〉70MPa, ash oontent＜0.5%wt, degree of graphitization 50～60%, the charcoal graphite particle size is 10-50 μ m.
The present invention also provides the above-mentioned sea water pump sealing preparation method who soaks the furane resin carbon graphite composite material, the charcoal graphite matrix is put into impregnating autoclave, kept 20～40 minutes after being evacuated down to 130～150Pa, suck furane resin then, with nitrogen or pressurized with compressed air to 1～1.4MPa, wipe out the resin on tubulose charcoal graphite matrix surface after pressurize 6～10 hours, release are taken out, under the natural ventilation condition, dried 24～48 hours.Above-mentioned tubulose charcoal graphite matrix put into solidify jar, after insulation, pressurize were finished, outage was taken out with below the stove decrease temperature and pressure to 50 ℃.After the resin duricrust is pulled down in Vehicle Processing, carry out the dipping second time, solidify by above-mentioned technology again, promptly can be used for processing the sea water pump sealing ring.
With tubulose charcoal graphite matrix put into solidify jar after, curing process is:
Room temperature～120 ℃, 5～10 ℃/hour; 120～150 ℃, 10～20 ℃/hour; 150～180 ℃, 20～30 ℃/hour, 180 ℃ of insulations 2～3 hours; All maintain 1～1.5MPa in above-mentioned each temperature range jar internal pressure.
Employed fine graphite can be ordered in market in the carbon graphite composite material for sea water pump sealing of the present invention, and also available pitch coke is a raw material, through repeatedly impregnating pitch and roasting, obtains 2000～2300 ℃ of graphitization processing at last.
The invention has the beneficial effects as follows:
1, the material of the present invention preparation has over-all propertieies such as excellent lubrication, sealing, wear-resisting, seawater corrosion resistance and intensity height, and manufacturing cost is lower, has satisfied the service requirements of sea-water pump fully.
2, with material preparation sea water pump sealing ring provided by the invention, can use continuously more than ten times, each trouble-free service 1250 seconds has satisfied the service requirements of sea-water pump fully.
Embodiment
Embodiment 1
Become 10 of the charcoal carbon tubes of desired shape with finestructure MSL-IV charcoal machining graphite, charcoal carbon tube external diameter is 48mm, wall thickness is 6mm, in 110 ℃ baking oven, dried 1 hour after using water as the medium ultrasonic cleaning, again graphite matrix is put into impregnating autoclave, be evacuated down to 133Pa and kept 30 minutes, suck furane resin and arrive 1.2MPa with pressurized with compressed air again, pressurize wipes out tubulose charcoal graphite matrix surface after the release taking-up after 6 hours resin dried in draughty air 24 hours naturally.Put into then and solidify jar, solidify: room temperature～120 ℃, 5～10 ℃/hour of heat-up rates by following technology; 120～150 ℃, 10～20 ℃/hour of heat-up rates; 150～180 ℃, 20～30 ℃/hour of heat-up rates were 180 ℃ of insulations 2～3 hours.In above temperature range, a jar internal pressure maintains 1～1.5MPa.After insulation, pressurize finished, outage was taken out with below the stove decrease temperature and pressure to 50 ℃.After the resin duricrust is pulled down in Vehicle Processing, repeat above-mentioned dipping, curing process more once, promptly can be used for processing the sea water pump sealing ring.This matrix material is made of charcoal graphite matrix dipping furane resin, and the weight percent of furane resin is 8%, and present embodiment adopts furfuryl alcohol resin, is 50 seconds with the viscosity number that is coated with No. 4 cup measurement furane resin.
Prepare the volume density of material〉1.96g/cm
3, folding strength 60MPa, ultimate compression strength〉130MPa, Shore hardness 65～75, open porosity＜1%.Wear ring with this materials processing surpasses 10 times in the actual use of sea-water pump, works 1250 seconds at every turn.
Comparative example
10 sea water pump sealing tubular blanks of high-strength, highly dense, the high-purity SMF-650 machining graphite of producing with the carbon element factory, Shanghai, density 〉=the 1.96g/cm3 of the material that employing and the identical dipping of above-mentioned enforcement, curing complete processing are prepared, folding strength 40～50MPa, ultimate compression strength 100～110MPa, Shore hardness 40～50.With the sea water pump sealing ring of this materials processing, the graphite grazing surface wear often appears in actual use, and as ditch dug with a plow, fall piece etc., hardness, the intensity of the body material of its reason and selection are on the low side, and degree of graphitization is higher, and material is soft relevant.
Embodiment 2
Difference from Example 1 is:
In 110 ℃ baking oven, dried 1 hour after using water as the medium ultrasonic cleaning, again graphite matrix is put into impregnating autoclave, being evacuated down to 140Pa kept 40 minutes, suck furane resin and arrive 1.4MPa with pressurized with compressed air again, pressurize wipes out tubulose charcoal graphite matrix surface after the release taking-up after 8 hours resin dried in draughty air 36 hours naturally.Put into then and solidify jar, solidify: room temperature～120 ℃, 5～10 ℃/hour of heat-up rates by following technology; 120～150 ℃, 10～20 ℃/hour of heat-up rates; 150～180 ℃, 20～30 ℃/hour of heat-up rates were 180 ℃ of insulations 2～3 hours.In above temperature range, a jar internal pressure maintains 1～1.5MPa.After insulation, pressurize finished, outage was taken out with below the stove decrease temperature and pressure to 50 ℃.After the resin duricrust is pulled down in Vehicle Processing, repeat above-mentioned dipping, curing process more once, promptly can be used for processing the sea water pump sealing ring.This matrix material is made of charcoal graphite matrix dipping furane resin, and the weight percent of furane resin is 5%, and present embodiment adopts furfuryl alcohol resin, is 20 seconds with the viscosity number that is coated with No. 4 cup measurement furane resin.
Prepare the volume density of material〉1.96g/cm
3, folding strength 60MPa, ultimate compression strength〉130MPa, Shore hardness 65～75, open porosity＜1%.Wear ring with this materials processing surpasses 10 times in the actual use of sea-water pump, works 1250 seconds at every turn.
Embodiment 3
Difference from Example 1 is:
In 110 ℃ baking oven, dried 1 hour after using water as the medium ultrasonic cleaning, again graphite matrix is put into impregnating autoclave, being evacuated down to 150Pa kept 20 minutes, suck furane resin and arrive 1MPa with nitrogen pressure again, pressurize wipes out tubulose charcoal graphite matrix surface after the release taking-up after 10 hours resin dried in draughty air 48 hours naturally.Put into then and solidify jar, solidify: room temperature～120 ℃, 5～10 ℃/hour of heat-up rates by following technology; 120～150 ℃, 10～20 ℃/hour of heat-up rates; 150～180 ℃, 20～30 ℃/hour of heat-up rates were 180 ℃ of insulations 2～3 hours.In above temperature range, a jar internal pressure maintains 1～1.5MPa.After insulation, pressurize finished, outage was taken out with below the stove decrease temperature and pressure to 50 ℃.After the resin duricrust is pulled down in Vehicle Processing, repeat above-mentioned dipping, curing process more once, promptly can be used for processing the sea water pump sealing ring.This matrix material is made of charcoal graphite matrix dipping furane resin, and the weight percent of furane resin is 10%, and present embodiment adopts furfuryl alcohol resin, is 70 seconds with the viscosity number that is coated with No. 4 cup measurement furane resin.
Prepare the volume density of material〉1.96g/cm
3, folding strength 60MPa, ultimate compression strength〉130MPa, Shore hardness 65～75, open porosity＜1%.Wear ring with this materials processing surpasses 10 times in the actual use of sea-water pump, works 1250 seconds at every turn.
Claims (6)
1, a kind of carbon graphite composite material for sea water pump sealing is characterized in that: this matrix material is made of charcoal graphite matrix dipping furane resin, and the weight percent of furane resin is 5-10%.
2, according to the described carbon graphite composite material for sea water pump sealing of claim 1, it is characterized in that: the charcoal graphite matrix is selected the carbon graphite material of finestructure, highly dense, high-strength, medium degree of graphitization for use, requires volume density 1.80-1.84g/cm
3, folding strength 50MPa, ultimate compression strength〉70MPa, ash oontent＜0.5%, degree of graphitization 50～60%, the charcoal graphite particle size is 10-50 μ m.
3, according to the described carbon graphite composite material for sea water pump sealing of claim 1, it is characterized in that: with the viscosity number that is coated with No. 4 cup measurement furane resin is 20-70 second.
4, the preparation method of the described carbon graphite composite material for sea water pump sealing of a kind of claim 1 is characterized in that concrete steps are as follows:
(1) Vehicle Processing is good tubulose charcoal graphite matrix carries out ultrasonic cleaning, dries after removing the charcoal graphite dust in surface and the hole;
(2) again tubulose charcoal graphite matrix is put into impregnating autoclave, kept 20～40 minutes after being evacuated down to 130～150Pa;
(3) suck furane resin then,, wipe out the resin on tubulose charcoal graphite matrix surface after pressurize 6～10 hours, release are taken out, under the natural ventilation condition, dried 24～48 hours with nitrogen or pressurized with compressed air to 1～1.4MPa;
(4) above-mentioned tubulose charcoal graphite matrix is put into solidified jar, after insulation, pressurize were finished, outage was taken out with below the stove decrease temperature and pressure to 50 ℃;
(5) after the resin duricrust is pulled down in Vehicle Processing, carry out the dipping second time, solidify by above-mentioned technology again, promptly can be used for processing the sea water pump sealing ring.
5, according to the preparation method of the described carbon graphite composite material for sea water pump sealing of claim 4, it is characterized in that: described finestructure, charcoal graphite highly dense, high-strength, medium degree of graphitization are raw material with the pitch coke, through repeatedly impregnating pitch and roasting, obtain 2000～2300 ℃ of graphitization processing at last.
6, according to the preparation method of the described carbon graphite composite material for sea water pump sealing of claim 4, it is characterized in that: after tubulose charcoal graphite matrix was put into the curing jar, curing process was:
Room temperature～120 ℃, 5～10 ℃/hour; 120～150 ℃, 10～20 ℃/hour; 150～180 ℃, 20～30 ℃/hour,, all maintain 1～1.5MPa in above-mentioned each temperature range jar internal pressure 180 ℃ of insulations 2～3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101587592A CN101451058A (en) | 2007-12-07 | 2007-12-07 | Carbon graphite composite material for sea water pump sealing and preparation method thereof |
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|---|---|---|---|
| CNA2007101587592A CN101451058A (en) | 2007-12-07 | 2007-12-07 | Carbon graphite composite material for sea water pump sealing and preparation method thereof |
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| CN101451058A true CN101451058A (en) | 2009-06-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104002460A (en) * | 2014-05-13 | 2014-08-27 | 龚孝祥 | Graphite pipe manufacturing method for eliminating extruding internal stress and microcracks |
| CN106987089A (en) * | 2017-05-22 | 2017-07-28 | 贵州兰鑫石墨机电设备制造有限公司 | The normal temperature cure technique of furane resins impregnated graphite materials |
| CN107008213A (en) * | 2017-04-20 | 2017-08-04 | 南通理工学院 | The heat curing process and its equipment of furane resins impregnated graphite materials |
| CN117447204A (en) * | 2023-12-22 | 2024-01-26 | 成都中超碳素科技有限公司 | Preparation method of mechanical carbon material |
-
2007
- 2007-12-07 CN CNA2007101587592A patent/CN101451058A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104002460A (en) * | 2014-05-13 | 2014-08-27 | 龚孝祥 | Graphite pipe manufacturing method for eliminating extruding internal stress and microcracks |
| CN107008213A (en) * | 2017-04-20 | 2017-08-04 | 南通理工学院 | The heat curing process and its equipment of furane resins impregnated graphite materials |
| CN106987089A (en) * | 2017-05-22 | 2017-07-28 | 贵州兰鑫石墨机电设备制造有限公司 | The normal temperature cure technique of furane resins impregnated graphite materials |
| CN117447204A (en) * | 2023-12-22 | 2024-01-26 | 成都中超碳素科技有限公司 | Preparation method of mechanical carbon material |
| CN117447204B (en) * | 2023-12-22 | 2024-03-15 | 成都中超碳素科技有限公司 | Preparation method of mechanical carbon material |
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Open date: 20090610 |